System Guide

Introduction

Heating

Air-Condition

Pressure Boosting

Wastewater

Tool box

Reference project

Introduction

How to use

• Drawing library

1 .

The Flow THINKING is a concept especially developed for our partners in

commercial building services

FLOW THINKING means:

> Focusing on the customer > Embracing system knowledge > Being a competent partner & adviser > Finding the right solutions

> Providing tools for your daily work

As an element of this concept we have developed “The Gundfos System Guide”

The Grundfos System Guide is an extensive reference book, which goes through the standard systems within: • heating

• air-conditioning • pressure boosting • wastewater

The systems are evaluated, and the Guide gives recommendations on how to prepare the most energy-optimal, reliable and comfortable system, considering the components, which form your system. Contents

The Guide contains a short review of a few theoretical areas within the mentioned systems. This is meant as a “tool box”, which can be used across of systems.

Overview: Here a short overview is given of the individual systems, and which Grundfos pumps are recom-mended for use in the system.

System description: In this paragraph the specific systems are reviewed in details. Suggestions are given of how to build up the system, so that the interaction between the components in the system is optimised with regard to comfort, safety and energy. Here we focus on how speed-regulated pumps are used in the systems.

How to select: Here it is shown how the pump/pump system is dimensioned and selected, provided the system is built up as described under system description.

A Guide – not a collection of formulas

The System Guide is designed to be a practical tool for professionals, who already have the theoretical knowledge about systems. So the System Guide is not a completely slavish going through the structure of all systems, but it can with advantage be used as a source of inspiration or a checklist.

The System Guide has been designed in co-operation with system specialists from all over Europe. Even though many areas have been harmonized, there may still be examples of system constructions, which traditionally are not used locally

Always updated

Grundfos will in future continue to design and spread competences within systems. So regularly there will be supplements to the Grundfos System Guide.

How to use

1 .

D 

How to use

Pump Chiller Cooling Tower Cooling Tower Cooling Tower Buffer Tank Fan Coil 2 pipe type Fan Coil 4 pipe type Fan Coil Combination type Air Unit In-let Air Unit Out-let Cooling Surface Heating Surface Heat/Cool Recovering Surface 1 . 3

M M M M M M M M -++

D 

How to use

Pressureraizing Unit Diaphragm Tank Exspansion tank Open Type Hot WaterTank With Heat Element

Hot Water Storage Tank Boiler Heat excanger Radiator Termastatic radiator valve Throttle valve Isolation valve

Non return valve

2 way motor valve

3 way motor valve (divide)

3 way motor valve (collecting)

Pressure control valve

Pressure relief valve

Safety valve

1 .

2. Heating

Overview

Ÿ System/products

Ÿ Product description

Application System

Ÿ Main pumps

Ÿ Boiler shunt

Ÿ Mixing loops

Ÿ Heat surfaces

Ÿ Heat recovery

Ÿ DHW circulation

Ÿ DHW production

How to select

Ÿ Main pumps

Ÿ Boiler shunts

Ÿ Mixing loops

Ÿ Heat surfaces

Ÿ Heat recovery

Ÿ DHW circulation

Ÿ DHW production

2 . 1

2. Heating

S / 

Overview

UPS Series 100 O O X

UPS Series 200 O O O O O X X

UPE Series 2000 X X X

TPE Series 2000 X X X X

TP/LM/LP/CLM O O O X X

TPE/LME/LPE/CLME X X X X X

NK/NB O O O X

NKE/NBE X X X

Main

pumps

Boiler

shun

ts

Mixing

loops

Hea

t sur

faces

Hea

t r

ec

ov

er

y

DHW

cir

cula

tion

DHW

pr

oduc

tion

First choice = X

Second choice = O

System Type Product Type Heat recovery Heating surfaces Main Pumps Boiler shunts Heat Production Mixing loop HW HWC CW DWH 2 . 1

M PMU t p G10

2. Heating

P / 

Overview

UPS Series 100

UPS Series 200 X X X X X

UPE Series 2000 X X X X X X

TPE Series 2000 X X X X X X

TP/LM/LP/CLM

TPE/LME/LPE/CLME X X X X X X X

NK/NB

NKE/NBE X X X X X X X

External

Alarm

Remote

con

tr

ol

GEN

Ibus

LON

bus

Ext

. Star

t /

St

op

Analog

input

External

sensor

Communication Product Type

PC User level

(BMS supply)

Sub-station level

(BMS supply)

Component level

(Grundfos)

PMU G10 M t p 2 . 2

2. Heating

P / 

Overview

PMU

PFU

Delta Control

PCU

Management unit for up to 8 pumps Preset controller for up to 4 pumps Complete control panel for up to 4 pumps

Contact unit for up to 4 pumps UPE Series 2000 TPE Series 2000 Inline E-pumps In-Line E-pumps In-Line End suction E-Pumps

End suction PMU PFU 2.2 kW 7.5 kW 2.2 kW 7.5 kW 7.5 kW 315 kW

Functionality Used in Max. kW

connection pump size

with

∆p

2 .

2. Heating

P 

Overview

Heating Product Range

Survey curve 50 Hz

H[m] Q[m3_/h]

End-suction Dry-runners

NB/NK NBE/NKE

In-line Dry-runners

TP/LM/LP/CLM TPE Series 2000 TPE/LME/LPE/CLME

In-line Wet-runners

UPS Series 100 UPS Series 200 UPE Series 2000 2 . 4

2. Heating

F / 

Features

S

Wide product range Wide system range Support tools

I

Easy electrical connection Easy access to speed regulator Clear user interface

Integrated frequency converter No need for motor protection

O

Very low noise level High quality material Varible speed

High efficiency

Benefits

S

Only one supplier Easy selection Safe selection I Easy/safe installation Safe/quick commencement Quick commencement Safe installation Low installation cost

O High comfort Long lifetime Energy saving Low operation cost

Overview

2 .

2. Heating

UPS S 100

T D Temperature -25 to +110°C Pressure PN 10 (10 bar) Power range 25W to 250W Speed 1 to 3 speed Connections Unions; Flanges Port to port 130 to 250 mm Pump housing Cast iron; Bronze Stainless Steel

C

None

M P F Easy electrical connection Easy access to speed regulator Very low noise level

High quality material High efficiency

No need for motor protection Wide product range

Wide application range

M C B Installer:

Ÿ Easy installation Ÿ Only one supplier Ÿ 2 years warranty End user:

Ÿ Maintenance free Ÿ Long lifetime Ÿ Low operating cost Ÿ High comfort

Overview

UPS Series 100 Q[m3_/h] H[m] 2 . 6

2. Heating

UPS S 200

T D Temperature -10 to +120°C Pressure PN 10 (10 bar) Power range 250W to 2200W Speed 3 speed Connections Flanges (PN6/10) Port to port 220 to 450 mm Pump housing Cast iron; Bronze

C

Alarm module (accessories) GENIbus module (accessories)

M P F

Easy electrical connection Water lubricated bearings Very low noise level High quality material High efficiency

Motor protection module Wide product range Wide application range

M C B Installer:

Ÿ Easy installation Ÿ Only one supplier Ÿ Easy to start-up End user:

Ÿ Long lifetime Ÿ Maintenance free Ÿ Low operating cost Ÿ High comfort

Overview

UPS Series 200 Q[m3_/h] H[m] 2 . 7

2. Heating

UPE S 2000

T D Temperature +2 to +95°C Pressure PN 10 (10 bar) Power range 60W to 2200W Speed Variable speed Connections Unions; Flanges Port to port 130 to 450 mm Pump housing Cast iron; Bronze

C Alarm relay Digital input Analog input GENIbus M P F Easy electrical connection Water lubricated bearings Very low noise level High quality material High efficiency

Integrated frequency converter No need for motor protection Wide product range

Communication

M C B Installer:

Ÿ Easy installation Ÿ Only one supplier Ÿ Easy start-up End user:

Ÿ Long lifetime

Ÿ Very low operating cost Ÿ Very high comfort Ÿ Access to operation data

Overview

UPS Series 2000 Q[m3_/h] H[m] 2 . 8

2. Heating

TPE S 2000

T D Temperature -25 to +140°C Pressure PN 16 (16 bar) Power range 1.1kW to 7.5kW Speed Variable speed Connections Flanges Port to port 280 to 450 mm Pump housing Cast iron

C Alarm relay Digital input Analog input GENIbus M P F Easy electrical connection Integrated frequency converter Integrated diff. pressure sensor High quality material

High efficiency

No need for motor protection Wide product range

Cataphoresis treated Communication M C B Installer: Ÿ Easy installation Ÿ Easy start-up Ÿ Only one supplier End user:

Ÿ Long lifetime

Ÿ Very low operating cost Ÿ High comfort

Ÿ Access to operation data

Overview

TPE Series 2000 Q[m3_/h] H[m] 2 . 9

2. Heating

TP/LM/LP/CLM

T D Temperature -25 to +140°C Pressure PN 20 (20 bar) Power range 0.37kW to 45kW Speed 1 speed Connections Flanges Port to port 280 to 820 mm Pump housing Cast iron; Bronze

C None

M P F High quality material High efficiency Wide product range Twin head pumps Wide application range Standard motor Cataphoresis treated

M C B Installer:

Ÿ Easy installation Ÿ Only one supplier End user:

Ÿ Long lifetime Ÿ Low operating cost Ÿ High comfort

Overview

TP/LM/LP/CLM Q[m3_/h] H[m] 2 . 10

2. Heating

TPE/LME/LPE/CLME

T D Temperature -25 to + 140°C Pressure PN 16 (16 bar) Power range 1.1kW to 7.5kW Speed Variable speed Connections Flanges Port to port 280 to 450 mm Pump housing Cast iron

C Alarm relay Digital input Analog input GENIbus M P F Easy electrical connection Integrated frequency converter High quality material

High efficiency

No need for motor protection Wide product range

Cataphoresis treated Communication M C B Installer: Ÿ Easy installation Ÿ Easy start-up Ÿ Only one supplier End user:

Ÿ Long lifetime

Ÿ Very low operating cost Ÿ High comfort

Ÿ Access to operation data

Overview

TPE/LME/LPE/CLME Q[m3_/h] H[m] 2 . 11

2. Heating

NB/NK

T D Temperature -10 to + 140°C Pressure PN 16 ( 16 bar ) Power range 0.37 KW to 355 KW Speed 1 speed Connections DN 32 - 300 Pump housing Cast iron, Bronze

C None

M P F Flexibility

High quality material High efficiency Wide product range Spacer coupling Wide system range Standard motor

M C B Installer:

Ÿ Easy installation Ÿ Only one supplier End user:

Ÿ Long lifetime Ÿ Low operating cost

Overview

NB/NK Q[m3_/h] H[m] 2 . 12

2. Heating

NBE/NKE

T D Temperature -10 to +140°C Pressure PN 16 ( 16 bar ) Power range 0.75 KW to 7.5 KW Speed Variable Connections DN 32 - 125 Pump housing Cast iron

C Alarm relay Digital input Analog input GENIbus M P F Easy electrical connection Integrated frequency converter High quality material

High efficiency

No need for motor protection Wide product range

Communication

M C B Installer:

Ÿ Easy installation Ÿ Easy start-up Ÿ Only one supplier End user:

Ÿ Long lifetime

Ÿ Very low operating cost Ÿ High comfort

Ÿ Access to operation data

Overview

NB/NK Q[m3_/h] H[m] 2 . 13

2000 4000 6000 8000 100 80 60 40 20 100% 75% 25% 50%

2. Heating

M 

F

Due to variation in the heat demand and the flow, we recommend to use speed controlled pumps in parallel as main pumps. Maximum 3 pumps plus 1 as standby pump. By speed controlling all the pumps it is possible to obtain the maximum energy saving.

D Flow

per Pump Pump type m3_/h

5 - 60 UPE Series 2000 60 - 100 TPE Series 2000

100 - 200 LM/LP/CLM + External freq. converter 200 - 1000 NK+ External freq. converter

It is important to check the efficiency at the duty point where the system has a high number of operating hours.

I

Using UPE and TPE Series 2000, no external pres-sure sensor and motor protection is necessary, only a PMU is needed for parallel operation.

It is possible to have proportional pressure without a sensor placed in the system.

For pumps above 7.5 kW both external sensor, motor protection and a pump control unit is neces-sary.

System description

Flow variation in a reference year (8760 hours)

Flow %

Hours/year

Duty point with a high number of operating hours

Flow

When pumps are installed in parallel non-return valves must be installed

2 .

75% 25% 50% 100% 75% 25% 50% 100%

2. Heating

B 

F

The primary task of the boiler shunt pump is to ensure that the temperature differences between top and bottom of the boiler are not too big, big temperature differences cause tension in the mate-rial and thus reduce the life of the boiler.

For certain types of fuel there is a risk of corrosion at too low temperatures at the bottom of the boiler. Maximum safety is ensured when using a control-led pump, and the energy saving is optimal.

D Flow

per Pump Pump type m3_/h

5 - 100 TPE/LME/LPE/CLME

100 - 200 LM/LP/CLM + External freq. converter 200 - 1000 NK+ External freq. converter

Often the pumps have high flow and low head, and then it is important to check the NPSH value of the pump.

I

TPE/LME/LPE/CLME: The pumps have an integrated frequency converter and a motor protection. A temperature transmitter with an output signal of 0/5-10V or 0/4-20 mA should be used. R100 remote control is used for start-up and later reading out of operating data.

LM/LP/CLM/NK: The mentioned pump types require an external frequency converter and an external regulator.

System description

tF 90°C 50°CtR ∆t= 40°C Head m NPSH m Max. flow Flow Flow

Placing of temperature sensor

t

2 .

2. Heating

M 

F

Due to variation in use and heat demand in differ-ent parts of the building, the system is divided into zones controlled by a mixing loop. The flow temperature will be lower than in the mains sup-ply, which will result in a higher flow in the zone than in the mains supply. This will help obtain a better hydraul-ic balance in the total system. Speed controlling the pump makes it possible to obtain the maximum energy saving.

D Flow

per Pump Pump type m3_/h

5 - 60 UPE Series 2000 60 - 100 TPE Series 2000

When using a two-way valve, the pressure lost in the valve will be managed by the main pump. When using a three-way valve, the pump in the mixing loop also has to manage the pressure lost in the valve.

I

Using UPE and TPE Series 2000 there is no need for an external pressure sensor and a motor protection. It is possible to have proportional pressure without a sensor placed in the system.

System description

Q = 4.3 m3_/h tF = 60°C tF = 80°C Q = 2.15 m3_/h tF = 40°C tF = 40°C Φ = 100kW M M ∆p pump

Mixing loop with 2 way valve

M

∆p pump

Mixing loop with 2 way valve

2 .

2. Heating

H 

F

A heating surface heats the air which through the ventilation system is blown into the building. The temperature in the heating surface depends on the outdoor temperature and is controlled by way of the ventilation system’s control unit. The system has a constant flow and variable temperature, where it is important that the flow is correct. Normally the flow is adjusted by a regulating valve, it may also be an advantage to use an adjustable pump (E-pump).

D Flow

per Pump Pump type m3_/h

5 - 60 UPE Series 2000 60 - 100 TPE/LME/LPE

I

UPE Series 2000:

The pump is set to constant curve and then adjusted to the correct flow.

TPE/LME/LPE:

The pump is set at uncontrolled mode, and then adjusted to the correct flow.

This is easily done with remote control R100.

System description

Flow adjusted with a valve Flow adjusted with a pump M M Head Power Max. speed Flow adjusted with a valve Correct flow Flow ∆p valve Head Power Max. speed Correct flow Flow Reduced speed 2 . 17

2. Heating

H 

F

The purpose of the system is to recover the heat of the outlet air. The primary task of the pump is to ensure an optimal flow between the heating surfaces. The pump/valve is controlled from the general control unit of the ventilation system. The saving potential of using a controlled pump in stead of a three-way valve to reach the correct temperature is very big.

D Flow

per Pump Pump type m3_/h

5 - 100 TPE/LME/LPE

The total efficiency of the system depends on whether the circulated quantity of water is correct. If there is a risk of temperatures below 0°C in the air intake of the system, the system must be applied with an antifreeze agent. If a 37% glocyl mixture is used, this will protect against frost down to –20°C.

I

The pump is set at uncontrolled, and the signal from the central control unit is connected to the analog entry (0/5-10v or 0/4-20 mA).

R100 remote control must be used in connection with setting up the pump.

System description

M

3 way valve controlled system

Pump controlled system

System efficiency η = t2 - t1

t3 - t1

Air out Air in

t1

t2

t3

2 .

2. Heating

H  

F

The purpose of the system is domestic hot water heating. The function of the circulator pump is to ensure that hot water is always available as close to the tapping point as possible, in order to reduce waste of water and increase the comfort. In certain installations (loading circuits) the pump can at the same time ensure the circulation between the inverter and the storage tank.

D Flow

per Pump Pump type

m3_{/h Uncontrolled Controlled}

0.5 - 6 UPS Series 100 TPE 6 - 60 UPS Series 200 TPE 60 - 200 LM/LP/CLM LME/LPE/CLME

Normally uncontrolled pumps are used, because usually the flow variation is only small. It may be advantageous to use controlled pumps for adjust-ment of the flow when starting up the system, though.

In large systems it will also be an advantage to use a temperature controlled pump.

I

Because of the contents of gasses in water, it is important that this gas is not gathered in the pump, thus reducing the lifetime of the pump. Therefore it is always recommended to install the pump with upward flow direction, and minimum horizontal flow direction.

System description

Cold water

Hot

water waterHot

circulation

Temperature transmitter

Cold water

Hot

water waterHot

circulation

Cold water Air-vent

2 .

2. Heating

H  

F

To make the system as flexible as possible, the heating and storage of the domestic hot water are divided into two units, one for heating and one for accumulation of the hot water. The construction of the systems among others depends on the kind of heat exchanger (charger) used. The pump is con-trolled by the temperature in the storage tank, either ON/OFF or variable speed.

D Flow

per Pump Pump type

m3_{/h Uncontrolled Controlled}

0.5 - 6 UPS Series 100 TPE 6 - 60 UPS Series 200 TPE 60 - 200 LM/LP/CLM LME/LPE/CLME

If one pump is used for both accumulation and circulation, the minimum flow of the pump must be the same as the required flow for circulation.

I

If the pump is installed on the ”hot” side of the exchanger, it must be ensured that the temperature does not exceed required max. temperature, as this may cause lime depositing in the pump.

Because of the contents of gasses in water, it is important that this gas is not gathered in the pump, thus reducing the lifetime of the pump. Therefore it is always recommended to install the pump with upward flow direction, and minimum horizontal flow direction.

System description

Recirculation pump Charge pump Hot water storage tank M HWC CW HW Recirculation and charge pump M Hot water storage tank HWC CW HW Charge

exchanger Recirculationexchanger

Charge pump Recirculation pump

Hot water storage tank HW CW HWC M M 2 . 20

50 100 500 100 500 1,000 5,000 10,000 1,000 1000 5,000 10,000 50,000 100,000 1 5 10 50 100 10

2. Heating

M 

Q     

Step 1: Define total m2 _{heated area ex. 20,000 m}2

Step 2: Define heat loss per m2 _{ex. 50 W/m}2 _{(total heat loss 1,000 kW)}

Step 3: Define ∆t of the system ex. ∆t 20°C (flow 43 m3_/h)

Step 4: Define ∆p of the pump ex. 10 m

Step 5: Find the exact pump in the data booklet ex. TPE 80-180 3.0 kW

How to select

100 W/m2 _{= Old building (low insulation)}

75 W/m2 _{= Old building (medium insulation)}

50 W/m2 _{= New building (high insulation)}

∆t = 40°C ex. (tF 90°C - tR 50°C) ∆t = 30°C ex. (tF 80°C - tR 50°C) ∆t = 20°C ex. (tF 70°C - tR 50°C) ∆t = 10°C ex. (tF 60°C - tR 50°C) W/m2 _{= 100} W/m2 _{= 75} W/m2 _{= 50} ∆t = 40°C ∆t = 30°C ∆t = 20°C ∆t = 10°C

= 1 pump + 1 stand-by pump (wet runner)

= 1 pump + 1 stand-by pump (dry runner)

= 2 pumps + 1 stand-by pump (dry runner)

= 3 pumps + 1 stand-by pump (dry runner)

H ea tin g de m an d in [k W ] H ea t in [m ] Heated area in [m2_] Flow in [m3_/h] 2 . 21

50 100 500 100 500 1,000 5,000 10,000 1,000 1000 5,000 10,000 50,000 100,000 1 5 10 50 100 10

2. Heating

M 

Q      Step 1: Define total m2 _{heated area}

Step 2: Define heat loss per m2

Step 3: Define ∆t of the system Step 4: Define ∆p of the pump

Step 5: Find the exact pump in the data booklet

How to select

100 W/m2 _{= Old building (low insulation)}

75 W/m2 _{= Old building (medium insulation)}

50 W/m2 _{= New building (high insulation)}

∆t = 40°C ex. (tF 90°C - tR 50°C) ∆t = 30°C ex. (tF 80°C - tR 50°C) ∆t = 20°C ex. (tF 70°C - tR 50°C) ∆t = 10°C ex. (tF 60°C - tR 50°C) W/m2 _{= 100} W/m2 _{= 75} W/m2 _{= 50} ∆t = 40°C ∆t = 30°C ∆t = 20°C ∆t = 10°C

= 1 pump + 1 stand-by pump (wet runner)

= 1 pump + 1 stand-by pump (dry runner)

= 2 pumps + 1 stand-by pump (dry runner)

= 3 pumps + 1 stand-by pump (dry runner)

H ea tin g de m an d in [k W ] H ea t in [m ] Heated area in [m2_] Flow in [m3_/h] 2 . 22

2. Heating

M 

S 1:

Calculate the flow required in the system: Φ x 0.86

(tF-tR) Φ = Heat demand in [kW] Q = Volume flow rate in [m3_/h]

tF = Dimensioning flow pipe temperature in [°C] tR = Dimensioning return-pipe temperature in [°C] 0.86 is the conversion factor (kcal/h to kW)

Calculate the heat required in the system:

The value to the end farthest off or the high value of the system is the basis for pump dimensioning.

S 2:

Lay down the flow variation of the system: Ex. of variation in the flow:

100% flow for 5% hours 75% flow for 10% hours 50% flow for 35% hours 25% flow for 50% hours

S 3:

Lay down the operating hours per year: System with domestic hot water production: 8,760 hours/year.

System without domestic hot water production, depending on the location:

ex. 5,500 hours/year.

S 4:

Define if it is profitable to speed control the pump depending on variation in flow and duration of variation.

How to select

= Q Head[m] _Max. duty point System characteristics Required head

Flow required Flow [m3_/h]

= Variation in flow = Calculation profile Operating hours in % Flow in % % Profitable to speed control the pump

Unprofitable to speed control the pump

M ax . v ar ia tio n in fl ow

Duration of variation in flow %

2 .

100 1 10 100 10 1,000 50 5 50 500 129 18 100% 75% 25% 50%

2. Heating

M 

S 5:

Define number of pumps in the system Systems with constant flow:

Pumps in operation and stand-by pumps.

When there is no variation in the flow, 1 pump in operation and 1 stand-by pump are probably the solution. Here, the efficiency in the duty point is very important.

Systems with variable flow:

Having variation, it can be profitable to choose more than 1 pump together with 1 stand-by pump. Here it is also important to check the efficiency in the duty point where there are a lot of operating hours.

S 6:

Where to place the transmitter:

Define where to place the differential pressure transmitter.

For smaller systems it is possible to use pumps (pumps up to 7.5kW) with integrated transmitter and controller; the pressure loss compensation will be managed by the built-in controller.

For larger systems the differential pressure trans-mitter can be placed either over the pump or at a critical point in the system.

How to select

Head in [m]

Flow in [m3_/h]

Duty point with a lot of operating hours ∆p pump ∆p system Flow 2 . 24

129 18

2. Heating

How to select

M  .

S D:

80,000 m2 _{old renovated building 75 W/m}2

Heat demand: (80,0000 m2 _{x 0.075 W/m}2_{) 6,000 kW} Flow temperature (tF): 90°C Return temperature (tR): 50°C ∆t : (90°C – 50°C) 40°C Flow ((6,000x0.86)/40) 129 m3_/h ∆p at max. flow (129 m3_{/h): 18 m} S:

1 constant speed pump + 1 stand-by pump

Selected pump: 2 x NK 80-250/259 Motor size: 2 x 11.0 kW Variation in flow:

100% flow for 5% hours

75% flow for 10% hours 50% flow for 35% hours 25% flow for 50% hours

Operating hours per year: 8,760 hours

E :

Flow Hours Effect Energy [%] [h] [kW] [kWh] 100 438 9.8 4,292 75 876 8.3 7,270 50 3,066 6.6 20,235 25 4,380 4.8 21,024 Total 8,760 Total 52,821 H ea tin g p ro du ct io n D ist rib uti on n et tF tR

poutlet pinlet – poutlet = _pinlet

∆p pump system

Q[m3_/h]

H[m]

100 1 10 100 10 1,000 50 5 50 500 129 18

2. Heating

M  .

How to select

S D:

80,000 m2 _{old renovated building 75 W/m}2

Heat demand: (80,0000 m2 _{x 0.075 W/m}2_{) 6,000 kW} Flow temperature (tF): 90°C Return temperature (tR): 50°C ∆t : (90°C – 50°C) 40°C Flow ((6,000 x 0.86)/40) 129 m3_/h ∆p at max. flow (129 m3_{/h): 18 m} S:

2 speed controlled pumps + 1 stand-by pump Selected pump: 3 x TPE 80-240 Motor size: 3 x 5.5 kW Variation in flow:

100% flow for 5% hours

75% flow for 10% hours 50% flow for 35% hours 25% flow for 50% hours

E :

Flow Hours Effect Energy [%] [h] [kW] [kWh] 100 438 10.3 4,551 75 876 5.9 5,168 50 3,066 3.62 11,099 25 4,380 1.31 5,738 Total 8,760 Total 26,516 H ea t p ro du ct io n D ist rib uti on n et tF tR

poutlet pinlet – poutlet = _pinlet

∆p pump system Flow in [m3_/h] Head in [m] 2 . 26

2. Heating

M  

S 1:

1 constant speed pump + 1 stand-by pump

Selected pump: 2 x NK 80-250/259 Motor size: 2 x 11.0 kW Control panel: Motor protection Change-over switch Access to system data: No Price index: 100 (4,500 EURO)

S 2:

2 speed controlled pumps + 1 stand-by pump Selected pump: 3 x TPE 80-240 Motor size: 3 x 5.5kW Controller: PMU Access to system data: Yes Price index: 162 (7,290 EURO)

C/:

The comparison of the two systems makes it clear that the large savings are gained by reduced flow. Already at a flow of 75% the savings are 29%. In addition to the energy saving there is also an in-crease in comfort, due to the reduced pressure and thereby reduced noise in the system valves.

Depending on the energy price the pay-back time is very short for the extra costs of the speed controlled pump system.

At a cost of 0.1 EURO per kWh, the pay-back time is approximately 1.1 years.

How to select

Flow Hours Effect Energy [%] [h] [kW] [kWh] 100 438 9.8 4,292 75 876 8.3 7,270 50 3,066 6.6 20,235 25 4,380 4.8 21,024 Total Total 8,760 52,821

Flow Hours Effect Energy [%] [h] [kW] [kWh] 100 438 10.3 4,551 75 876 5.9 5,168 50 3,066 3.62 11,099 25 4,380 1.31 5,738 Total Total 8,760 26,516

Flow Sys.1 Sys. 2 Savings Savings [%] [kWh] [kWh] [kWh] % 100 4,292 4,551 -259 -6 75 7,270 5,168 2,102 29 50 20,235 11,099 9,136 45 25 21,024 5,738 15,286 72 Total 52,821 26,516 26,305 50 2 . 27

100% 100%

2. Heating

B  .

How to select

S D: Boiler effect: 2,000 kW Flow temperature (tF): 90°C Return temperature (tR): 50°C Return temperature (tRB): 70°C Flow (QSH): 86 m3_/h

∆p with max. flow (129 m3_{/h): 8 m}

S:

1 Constant speed pump

Selected pump: 1 x CLM 125-211 Motor size: 1 x 4,0 kW Variation in flow:

100% flow for 33% hours

75% flow for 33% hours 50% flow for 33% hours

E :

Flow Hours Effect Energy [%] [h] [kW] [kWh] 100 1,833 3.7 6,782 75 1,833 3.7 6,782 75 1,833 3.7 6,782 Total 5,500 Total 20,346 tF 90°C tR 50°C tRB 70°C H Q Max. load

main system Min. load

main system

∆p valve

2 .

50% 75% 100% 100% 40% 12%

2. Heating

B  .

How to select

S D: Boiler effect: 2,000 kW Flow temperature (tF): 90°C Return temperature (tR): 50°C Return temperature (tRB): 70°C Flow (QSH): 86 m3_/h

∆p with max. flow (129 m3_{/h): 8 m}

S:

1 Constant speed pump

Selected pump: 1 x CLME 125-211 Motor size: 1 x 4,0 kW Variation in flow:

100% flow for 33% hours

75% flow for 33% hours 50% flow for 33% hours

E :

Flow Hours Effect Energy [%] [h] [kW] [kWh] 100 1,833 3.5 6,415 75 1,833 1.3 2,383 50 1,833 0.4 773 Total 5,500 Total 9,571 tF 90°C tR 50°C tRB 70°C H Q Max. load

main system Min. load

main system

t

2 .

2. Heating

M  .

S D:

Example with two-way valve:

Heat demand in the zone: 60 kW Flow temperature main system (tF): 90°C Flow temperature in the zone (tFZ): 70°C Return temperature in the zone (tRZ): 40°C Flow ((60 x 0.86)/30): 1.72 m3_/h

∆p zone at max. flow (1.72 m3_/h):

(radiators+RTV+pipes/valves)(0.2+0.8+1.0): 2 m

S:

1 speed controlled pump

Selected pump: UPE 25-40 Motor size: 1 x 60 W Operating hours per year: 5,500 With an MC module it is possible to have an alarm from the pump.

With an MB module it is possible to have GENIbus communication, + G10 (gateway) being LONWORK.

E :

Flow Hours Effect Energy [%] [h] [W] [kWh] 100 275 54 14.9 75 550 44 24.2 50 1,925 36 69.3 25 2,750 29 79.8 Total 5,500 Total 118.2

How to select

Q zone: 1.72 m3_/h tFZ 70°C tRZ 50°C ∆p pump: 2.0 m tF 90°C Q main 1.03 m3_/h M Alarm: output

Min./Max. curve: input

Stop/start: input

Analog 0-10V: input

Min./Max. curve: input

Stop/start: input GENIbus: in/output + G10 LONWORK: in/output MB 40/60 MB 40/60 Power supply Power supply G10 2 . 30

2. Heating

M  .

S D:

Example with three-way valve:

Heat demand in the zone: 60 kW Flow temperature main system (tF): 90°C Flow temperature in the zone (tFZ): 70°C Return temperature in the zone (tRZ): 40°C Flow ((60 x 0.86)/30): 1.72 m3_/h

∆p zone at max. flow (1.72 m3_/h):

three-way valve: 2.0 m (radiators+RTV+pipes/valves)(0.2+0.8+1.0): 2.0 m Total ∆p: 4.0 m

S:

1 speed controlled pump

Selected pump: UPE 25-80 Motor size: 1 x 250 W Operating hours per year: 5,500 With an MC module it is possible to have an alarm from the pump.

With an MB module it is possible to have GENIbus communication, + G10 (gateway) being LONWORK.

E :

Flow Hours Effect Energy [%] [h] [W] [kWh] 100 275 130 35.8 75 550 107 58.9 50 1,925 89 171.3 25 2,750 78 214.5 Total 5,500 Total 480.5

How to select

Q zone: 1.72 m3_/h tFZ 70°C tRZ 50°C ∆p pump: 4.0 m tF 90°C Q main 1.03 m3_/h M Alarm: output

Min./Max. curve: input

Stop/start: input

Analog 0-10V: input

Min./Max. curve: input

Stop/start: input GENIbus: in/output + G10 LONWORK: in/output MB 80 MB 80 Power supply Power supply G10 2 . 31

2. Heating

H  .

S D:

Example with constant speed pump:

Heat demand: 100 kW Flow temperature main system (tF): 75°C Flow temperature (tFS): 50°C Return temperature (tR): 25°C Flow ((100 x 0.86)/25): 3.4 m3_/h ∆p at max. flow (3.4 m3_/h): (surface+pipes/valves)(1.5+0.8+1.0): 3.3 m S:

1 constant speed pump

Selected pump: UPS 25-80 Motor size: 1 x 250 W Operating hours per year: 5,500 The pump is set at speed 3, and the flow is adjusted to calculated flow.

At speed 3 and a flow of 3.4 m3_{/h the head is 5.8 m.}

The pressure loss over the adjustment valve has to be (5.8 – 3.3) = 2.5 m more than at fully open valve.

E :

Flow Hours Effect Energy [%] [h] [W] [kWh] 100 5,500 221 1,216 Total 5,500 Total 1,216

How to select

Air flow Adjustment

valve Constant speed pump tR tFS tF M Head Flow Adjustment valve 5.8 m 3.3 m 3.4 m3_/h 2 . 32

2. Heating

H  .

S D:

Example with variable speed pump:

Heat demand: 100 kW Flow temperature main system (tF): 75°C Flow temperature (tFS): 50°C Return temperature (tR): 25°C Flow ((100 x 0.86)/25): 3.4 m3_/h ∆p at max. flow (3.4 m3_/h): (surface+pipes/valves)(1.5+0.8): 2.3 m S:

1 constant speed pump

Selected pump: UPE 25-80 Motor size: 1 x 250 W Operating hours per year: 5,500 The pump is set at constant curve and adjusted to the right flow. The total head is lower due to no adjustment valve in the system. At the same time it is possible to communicate with the pump.

E :

Flow Hours Effect Energy [%] [h] [W] [kWh] 100 5,500 140 770 Total 5,500 Total 770

S:

The energy saving compared to an installation with an adjustment valve:

(1,216-770) = 446 kWh = 27%

Moreover, an adjustment valve is not required (costs saved).

How to select

Air flow Variable speed pump tR tFS tF M Head Flow Max. curve 2.3 m 3.4 m3_/h Reduced speed 2 . 33

0 -40 -30 -20 -10 0 20 40 60% 0 20 40 60% 1100 1075 1050 1000 1025

2. Heating

H  .

S D:

Example with three-way valve:

Heat transfer: 200 kW Temperature air (t1): - 12°C Temperature air (t2): +10°C Temperature air (t3): +22°C Temperature liquid (tF): +12°C Temperature liquid (tR): + 0°C ∆t liquid system (12-0): +12°C Anti-freeze protection down to: -20°C

Calculation of flow:

Flow water((200 x 0.86)/12): 14.3 m3_/h

Compensation factor for anti-freeze: 1.14 (The specific heat drops by 20%)

(Density increase 6%)

Flow with anti-freeze liquid (14.3x1.14): 16.3 m3_/h

∆p system at max. flow

three-way valve: 3.3 m (heat surface+pipes/valves)(2.3+1.0): 3.3 m Compensation factor for anti-freeze: 1.3 Total ∆p: ((3.3+3.3) x 1.3) 8.6 m

S:

1 constant speed pump

Selected pump: TP 65-120 Motor size: 1 x 1.1 kW Operating hours per year: 5,500 Due to higher density the power consumption P2 will increase from 675 W to 715 W (P1=890W). To prevent overload of the motor it is important to check the max. P2 value of the motor. In this case the value is 1100 W, which gives a good safety margin. A dry-runner has been selected to avoid problems with condensation in the motor, and the shaft seal is of the RUUE type due to the liquid with glycol.

How to select

Air flow

outlet Air flowinlet

t3 tR tF t1 t2 M

Freezing point Propylene glycol_{Ethylene glycol}

Glycol Glycol Ethylene glycol 0°C 10°C 0°C 10°C Propylene glycol Density kg/m3 °C 2 . 34

0 -40 -30 -20 -10 0 20 40 60% 0 20 40 60% 1100 1075 1050 1000 1025

2. Heating

H  .

S D:

Example speed controlled pump:

Heat transfer: 200 kW Temperature air (t1): -12°C Temperature air (t2): +10°C Temperature air (t3): +22°C Temperature liquid (tF): +12°C Temperature liquid (tR): + 0°C ∆t liquid system (12-0): +12°C Anti-freeze protection down to: -20°C

Calculation of flow: Flow water((200 x 0.86)/12): 14.3 m3_/h

Compensation factor for anti-freeze: 1.14 (The specific heat drops by 20%)

(Density increase 6%)

Flow with anti-freeze liquid (14.3 x 1.14): 16.3 m3_/h

∆p system at max. flow

(heat surface+pipes/valves)(2.3+1.0): 3.3 m Compensation factor for anti-freeze: 1.3 Total ∆p: (3.3 x 1.3) 4.3 m

S:

1 speed contolled pump

Selected pump: TPE 65-60 Motor size: 1 x 0.55 kW Operating hours per year: 5,500 The pump is set at uncontrolled mode, and via the 0-10V analog input it is controlled by the air handling unit controller.

Due to higher density the power consumption P2 will increase from 360 W to 385 W (P1=511W). To prevent overload of the motor it is important to check the max. P2 value of the motor. In this case the value is 550 W, which gives a good safety margin.

A dry-runner has been selected to avoid problems with condensation in the motor, and the shaft seal is of the RUUE type due to the liquid with glycol.

How to select

Air flow

outlet Air flowinlet

t3

tR

tF

t1

t2

Freezing point Propylene glycol_{Ethylene glycol}

Glycol Glycol Ethylene glycol 0°C 10°C 0°C 10°C Propylene glycol Density kg/m3 °C 2 . 35

2. Heating

H   .

S 1:

1 constant speed pump

Selected pump: TP 65-120 Motor size: 1 x 1.1 kW Operating hours per year: 5,500 Three-way valve: Yes Access to system data: No Price index: 100 (570 EURO)

S 2:

1 speed controlled pump

Selected pump: TPE 65-60 Motor size: 1 x 0.55 kW Three-way valve: No Operating hours per year: 5,500 Access to system data: Yes Price index: 150 (860 EURO)

C/:

Using a speed controlled pump, the total pressure loss in the system drops dramatically, and it is pos-sible to get a variable flow in the system depending on the actual situation. When the flow is readjusted the pump will follow the system characteristics giving high savings. On top of the energy savings there is also a saving in investment and installation costs, as there is no need for the motor valve and the by-pass.

Depending on the energy price the pay-back time is very short for the extra costs of the speed controlled pump system. At a cost of 0.1 EURO per kWh the pay-back time is 1 year.

How to select

Flow Hours Effect Energy [%] [h] [kW] [kWh] 100 5,500 890 4,895 Total Total 5,500 4,895

Flow Hours Effect Energy [%] [h] [kW] [kWh] 100 2,200 511 1,124 75 2,200 308 678 50 1,100 173 190 Total Total 5,500 1,992

Flow Sys.1 Sys. 2 Saving Saving [%] [kWh] [kWh] [kWh] % 100 4,895 1,124 75 678 50 190 Total 4,895 1,992 2,903 59 2 . 36

2. Heating

H   .

S D:

Example with fixed speed pump: Hotel with 320 rooms.

Circulation loss per room: 200 W Total loss: 64 kW Hot water temperature (tH): 55°C Circulation return temperature (tC): 45°C ∆t system: 10°C Flow ((64 x 0.86)/10): 5.5 m3_/h

∆p at max. flow (5.5 m3_/h):

(tank+pipes/valves)(1.0+2.5+3.0): 7.0 m

S:

1 constant speed pump

Selected pump: UPS 32-120 FB Motor size: 1 x 400 W Operating hours per year: 8,760

With a relay module built into the terminal box, there is no need for external motor protection, and at the same time the pump will have an alarm relay.

Due to risk of corrosion the pump housing is made of bronze.

E :

Flow Hours Effect Energy [%] [h] [W] [kWh] 100 2,920 295 861 80 2,920 277 809 60 2,920 253 739 Total 8,760 Total 2,409

How to select

55°C 45°C 5.5 m3_/h 7.0 m Hot

water waterHot

circulation Heat loss Thermostatic valve Cold water Air-vent Heat loss 2 . 37

2. Heating

H   .

S D:

Example with fixed speed pump: Hotel with 320 rooms

Circulation loss per room: 200 W Total loss: 64 kW Hot water temperature (tH): 55°C Circulation return temperature (tC): 45°C ∆t system: 10°C Flow ((64 x 0.86)/10): 5.5 m3_/h

∆p at max. flow (5.5 m3_/h):

(tank+pipes/valves)(1.0+2.5+1.0): 5.0 m

S:

1 speed controlled pump

Selected pump: TPE 40-60 Motor size: 1 x 370 W Operating hours per year: 8,760 There is no need for motor protection, and at the same time the pump will have an alarm relay. The pump is set at controlled mode, and the signal from the temperature transmitter is connected directly to the terminal box.

E :

Flow Hours Effect Energy [%] [h] [W] [kWh] 100 2,920 260 760 80 2,920 185 540 60 2,920 126 368 Total 8,760 Total 1,668

Savings compared to a system with thermostatic valves are 30%. Furthermore, investment and total installation costs are lower.

How to select

55°C 45°C 5.5 m3_/h 5.0 m Hot

water waterHot

circulation Heat loss Temperature transmitter Cold water Air-vent Heat loss 2 . 38

M _storageHot M

2. Heating

H   .

S D:

Example with fixed speed pump: Hotel with 320 rooms.

Total effect (9,600/10): 800 kW Hot water temperature (tH): 55°C Cold water temperature (tCO): 8°C ∆t system: 47°C Flow ((800 x0.86)/47): 14.6 m3_/h ∆p at max. flow (14.6 m3_/h): (tank/exchanger+pipes/valves) (1.0+3.5+0.5+1.5): 6.5 m S:

1 speed controlled pump

Selected pump: TPE 50-120 Motor size: 1 x 1.1 kW Operating hours per year: 5,110 There is no need for motor protection, and at the same time the pump will have an alarm relay. The pump is set at controlled mode, and the signal from the temperature transmitter is connected directly to the terminal box. The ON/OFF thermostat in the storage tank is also connected direcly to the terminal box.

E :

Flow Hours Effect Energy [%] [h] [W] [kWh] 100 730 606 442 80 2,190 374 819 60 2,190 168 368 Total 5,110 Total 1,629

How to select

HW HWC CW Charge pump Hot water storage tank Temp. transmitter ON/OFF thermostat M = Water consumption = Variation in flow charge pump = Calculation profile

Flow in %

Day-and-night

2 .

3. Air-conditioning

Overview

• System/products

• Product description

System description

• Chiller pumps

• Cooling towers

• Dry cooler

• Main pumps

• Cooling surfaces

• Cooling ceilings/floors

• Fan coils

How to select

• Chiller pumps

• Cooling towers

• Dry cooler

• Main pumps

• Cooling surfaces

• Cooling ceilings/floors

• Fan coils

3 . 1

3. Air-conditioning

S/

Overview

UPS Series 100 O

UPS Series 200 O

TPE Series 2000 X X X

TP/LM/LP/CLM O O O O O O O

TPE/LME/LPE/CLME X X X X X O O

NK/NB O O O O

NKE/NBE X X X X

Chiller

pumps

Cooling

to

w

ers

Dr

y

cooler

Main

pumps

Cooling

sur

faces

Cooling ceilings/floors

Fan

coils

First choice = X

Second choice = O

System Type

Product Type

Cooling Tower or Air Cooled Condenser BatteryCooler Chilled Beam Fan coil

Buffer tank Chiller

M M M

Chiller pump Main pump

3 .

M PMU t p G10

3. Air-conditioning

P / 

Overview

UPS Series 100

UPS Series 200 X X X X X

TPE Series 2000 X X X X X X

TP/LM/LP/CLM

TPE/LME/LPE/CLME X X X X X X X

NK/NB

NKE/NBE X X X X X X X

External

Alarm

R100

Remote con tr ol

GEN

Ibus

LON

bus

Ext

. Star

t /

St

op

Analogue

input

External

sensor

Communication Product Type

PC User level

(BMS supply)

Sub-station level

(BMS supply)

Component level

(Grundfos)

PMU G10 M t p 3 . 2

3. Air-conditioning

P / 

Overview

PMU

PFU

Delta Control

PCU

Management unit for up to 8 pumps Preset controller for up to 4 pumps Complete control panel for up to 4 pumps

Contact unit for up to 4 pumps

TPE Series 2000

Inline E-pumps

In-Line E-pumps In-Line End suction E-Pumps

End suction PMU PFU 7.5 kW 7.5 kW 7.5 kW 315 kW

Functionality Used in Max. kW

connection pump size

with

∆p

3 .

3. Air-conditioning

P 

Overview

Air-conditioning Product Range

Survey curve 50 Hz

H[m] Q[m3_/h]

End-suction Dry-runners

NB/NK NBE/NKE

In-line Dry-runners

TP/LM/LP/CLM TPE Series 2000 TPE/LME/LPE/CLME

In-line Glandless

UPS Series 100 UPS Series 200 3 . 4

3. Air-conditioning

F / 

Overview

Features

S

Wide product range Wide system range Support tools

I

Easy electrical connection Easy access to speed regulator Clear user interface

Integrated frequency converter No need for motor protection

O

Very low noise level High quality materials Variable speed High efficiency

Benefits

S

Only one supplier Easy selection Safe selection I Easy/safe installation Safe/quick start up Quick start up Safe installation Lower installation cost

O High comfort

Durability and Reliability

Energy saving and Controllability Low operation cost

3 .

3. Air-conditioning

UPS S 100

Overview

T D Temperature -25 to +110°C Pressure PN 10 (10 bar) Power range 25W to 250W Speed 1 to 3 speed Connections Unions; Flanges Port to port 130 to 250 mm Pump housing Cast iron; Bronze Stainless Steel

C

No

M P F Easy electrical connection Easy access to speed switch Very low noise level

High quality material High efficiency

No need for motor protection Wide product range

Wide application range

M C B Installer:

• Easy installation • Only one supplier • 2 years’ warranty End user:

• Maintenance free • Durability

• Low operating cost • High comfort UPS Series 100 Q[m3_/h] H[m] 3 . 6

3. Air-conditioning

UPS S 200

Overview

T D Temperature -10 to +120°C Pressure PN 10 (10 bar) Power range 250W to 2200W Speed 3 speed Connections Flanges (PN6/10) Port to port 220 to 450 mm Pump housing Cast iron; Bronze

C

Alarm module (accessories) GENIbus module (accessories)

M P F

Easy electrical connection Water lubricated bearings Very low noise level High quality material High efficiency

Motor protection module Wide product range Wide application range

M C B Installer:

• Easy installation • Only one supplier • Easy to start-up End user:

• Long lifetime • Maintenance free • Low operating cost • High comfort UPS Series 200 Q[m3_/h] H[m] 3 . 7

3. Air-conditioning

TPE S 2000

Overview

T D Temperature -25 to +140°C Pressure PN 16 (16 bar) Power range 0.37kW to 7.5kW Speed Variable speed Connections Flanges Port to port 280 to 450 mm Pump housing Cast iron

C Alarm relay Digital input Anlog input GENIbus M P F Easy electrical connection Integrated frequency converter Integrated diff. pressure sensor High quality material

High efficiency

No need for motor protection Wide product range

Catephoresis coated Communication M C B Installer: • Easy installation • Easy start-up • Only one supplier End user:

• Long lifetime

• Very low operating cost • High comfort

• Access to operation data

TPE Series 2000

Q[m3_/h]

H[m]

3 .

3. Air-conditioning

TP/LM/LP/CLM

Overview

T D Temperature -25 to +140°C Pressure PN 20 (20 bar) Power range 0.37kW to 45kW Speed 1 speed Connections Flanges Port to port 280 to 820 mm Pump housing Cast iron; Bronze

C None

M P F High quality material High efficiency Wide product range Twin head pumps Wide application range Standard motor Catephoresis coated

M C B Installer:

• Easy installation • Only one supplier End user:

• Long lifetime • Low operating cost • High comfort TP/LM/LP/CLM Q[m3_/h] H[m] 3 . 9

3. Air-conditioning

TPE/LME/LPE/CLME

Overview

T D Temperature -25 to + 140°C Pressure PN 16 (16 bar) Power range 0.37kW to 7.5kW Speed Variable speed Connections Flanges Port to port 280 to 450 mm Pump housing Cast iron

C Alarm relay Digital input Anlog input GENIbus M P F Easy electrical connection Integrated frequency converter High quality material

High efficiency

No need for motor protection Wide product range

Catephoresis coated Communication M C B Installer: • Easy installation • Easy start-up • Only one supplier End user:

• Long lifetime

• Very low operating cost • High comfort

• Access to operation data

TPE/LME/LPE/CLME

Q[m3_/h]

H[m]

3 .

3. Air-conditioning

NB/NK

Overview

T D Temperature -10 to + 140°C Pressure PN 16 ( 16 bar ) Power range 0.37 KW to 355 KW Speed 50 Hz, 2 - 4 and 6 pol Connections DN 32 - 300

Pump housing Cast iron; Bronze

C None

M P F Flexibility

High quality material High efficiency Wide product range Spacer coupling Wide application range Standard motor

M C B Installer:

• Easy installation • Only one supplier End user:

• Long lifetime • Low operating cost

NB/NK

Q[m3_/h]

H[m]

3 .

3. Air-conditioning

NBE/NKE

Overview

T D Temperature -10 to +140°C Pressure PN 16 ( 16 bar ) Power range 0.75 KW to 7.5 KW Speed Variable Connections DN 32 - 125 Pump housing Cast iron

C Alarm relay Digital input Anlog input GENIbus M P F Easy electrical connection Integrated frequency converter High quality material

High efficiency

No need for motor protection Wide product range

Communication

M C B Installer:

• Easy installation • Easy start-up • Only one supplier End user:

• Long lifetime

• Very low operating cost • High comfort

• Access to operation data

NBE/NKE

Q[m3_/h]

H[m]

3 .

3. Air-conditioning

System description

C W P

F

Application with one chiller.

The chiller is fitted with temperature sensors which control the temperature difference depending on the cooling load. Care must be taken to ensure that there is no freezing up of the evaporator coils. Because of this, a constant water flow is required and usually a fixed speed pump is installed.

Control is normally via a regulating valve, but it may be possible to use a variable speed pump which is controlled according to the start/stop sequence of the chiller.

D Flow

per Pump Pump type m3_/h

5 - 150 TPE/LME/LPE/CLME

150 - 200 LM/LP/CLM + External freq. converter 200 - 1000 NK+ External freq. converter

I

Pump is set to uncontrolled operation and then adjusted to the correct flow. It is easily done with the remote control R100.

Pump terminals for start/stop input are connected. To secure a high comfort a standby pump can be added. Controller PFU will be used for alternation between two pumps.

Chiller pump Chiller pump Flow adjusted with a valve Flow adjusted with a pump Flow adjusted with a valve Head Power Max. speed Flow Correct flow ∆pvalve Flow adjusted with a variable speed pump Head Power Max. speed Flow Correct flow Reduced speed 3 . 13