Application
ECC is an electronic room temperature controller for water-based systems. ECC can control
- fan-coil units - inductions units
- air conditioning systems - small ventilating systems - 2-pipe systems with central
heating or cooling change-over - 4-pipe systems for sequential
heating or cooling
The electronic PI-controller with double loop can control supply air temperature providing required room temperature. The double loop function will eliminate tolerances in terminal units.
ECC must be connected to ECC-S supply air temperature sensor and ABNC
thermohydraulic motor. Then room control panel ECC-R is connected. However, ECC controller can be used without ECC-R room control panel, please consult Danfoss. ABNC thermohydraulic motor can be combined with KOVM 3-way valves and with RAV, VMT and RA-N 2-way valves. Direct acting valves can be used for both heating and cooling applications.
ECC has potentiometer for required room temperature setting. Use room control panel ECC-R for further room temperature (set point) displacement from 0 to ±5K or from 0 to ±2.5K.
ECC heating controller can also be used for temperature reduction at night and
Application
(ECC 12)
Application
(ECC 22)
ECC 22 is a sequential controller with adjustable neutral zone. Factory setting 2K. ECC 22 is used for 4-pipe systems with sequential heating and cooling.
The controller has two sets of sequential heating and cooling outputs. Each set has one supply air sensor to ensure equal room supply air temperature from all units.
ECC 22 has a green indicator lamp for cooling indication and a red lamp for heating indication.
ECC 12 can be used as heating or cooling controller. The controller has two outputs with one supply air temperature sensor each to ensure equal room supply air temperature from all units.
ECC 12 has a red indicator lamp for heating or cooling demand indication.
Temperature Set point
Type Description range displacement Code no.
Room control panel for continous
ECC-R set point displacement 10-30 °C ± 5 K 087N0050
Room control panel for continous
ECC-R set point displacement 12.5-27.5 °C ± 2.5 K 087N0051
Room temperature sensor
ECC-R Tamper proof version without – – 087N0052
room temperature displacement
Controller
Temperature
Type Description range Neutralzone Code no.
Heating or cooling controller
ECC 12 for 2-pipe systems 15-25 °C No 087B0061
Sequential controller for 4-pipe systems Adjustable
ECC 22 with sequential heating and cooling 15-25 °C 0.5-5 K 087B0062
Room control panel
Ordering
Accessories for ECC-R
Description Code no.
Adapter plate for CEV, CEK and CED replacement 087N0099
Thermohydraulic motor
Type Valve Function Code no.
KOVM, RAV and VMT normally 082F1046
ABNC RA 2000 closed 082F1045
ABNC motor and RA 2000 valve combination requires adapters and extension pieces supplied in boxes of 10 each.
A cap for motor protection against theft or damage is available. The cap is fixed with an internal hexagon screw.
ABNC accessories
Code no.
Valve Adapter Protection
and extension cap
RA 2000 082F1201 082F1211
RAV/VMT - 082F1211
Sensor
Type Description Code no.
ECC-S Supply air temperature sensor, NTC 12000 W at 25 °C, cable 1500 mm 087N0055
Three-way mixing valves type KOVM
Connection Max. pressure Max.
ISO 7/1 with without Test supply
Type kvs static bypass bypass Dpc1) pressure temp. Code no.
inlet outlet m3/h bar bar
bar bar bar °C
0.6 0.8 0.8 013U3014
KOVM Rp 1/2 Rp 1/2 1.5 10 1.6 0.8 0.8 16 90 013U3015
2.0 0.5 0.5 013U3020
1) Dpc represents pressure fall across valve-controlled heat exchanger.
Type Code no.
Æ 12 compression fittings 013L0288
Æ 15 compression fittings 013L0289
Code no. for 1-off. Supplied in boxes of 10.
Two-way valves, straight version, types RAV and VMT
Max. pressure
Connection Max.
Test supply
Type inlet outlet kvs operating Dp pressure temp. Code no.
m3/h bar bar ISO 7/1 bar °C RAV 10/8 Rp 3/8 R 3/8 1.2 013U0012 RAV 15/8 Rp 1/2 R 1/2 1.5 013U0016 10 0.8 16 120 RAV 20/8 Rp 3/4 R 3/4 2.3 013U0022 RAV 25/8 Rp 1 R 1 3.1 013U0027 ISO 228/1 VMT 15/8 G 3/4 A G 3/4 A 1.5 065F0115 VMT 20/8 G 1 A G 1 A 2.3 10 0.8 16 120 065F0120 VMT 25/8 G 1 1/4A G 1 1/4A 3.1 065F0125 Spare parts
Type Code no.1)
Gland seal (for all valves 013U0070
except RA 2000)
Type Cu-pipe fittings Code no.1)
Æ 15 x 1 013U0130 VMT 15 Æ 16 x 1 013U0131 Æ 18 x 1 013U0132 Æ 18 x 1 013U0134 VMT 20 Æ 22 x 1 013U0135 VMT 25 Æ 28 x 1 013U0140 Accessories
Type Plastic pipe fittings Code no.1)
Æ 16 x 2 013G3106
VMT 15
Æ 18 x 2 013G3108
Accessories
1) Supplied in boxes of 10.
Two-way valves type RA-N and RA-FN
Please see data sheet on RA valves.
Materials in contact with water: Valve body: MS 58, nickel-plated
W-no. 2.0402 Valve cone: NBR rubber
Pressure pin: CrMo steel, W no. 1.4112
O-ring: EPDM rubber
Transformer sizing Use an approved transformer with galvanic separation. Never use autotransformer.
Transformer data:
Primary voltage 230 V~ 50 - 60 Hz Secondary voltage 24 V ~ ±15% Calculate transformer size on the basis of formula:
P = 8 x n [VA]
n = maximum number of ABNC motors connected.
Transformer mounting is to follow regulations.
ECC 12 - Calculating maximum number of ABNC motors connected (n)
Add number of connected ABNC motors.
ECC 22 - Calculating n when heating and cooling outputs have the same number of ABNC motors
Add number of connected ABNC motors and divide the number by two (i.e. n = half the number of motors connected)
ECC 22 - Calculating n when heating and cooling outputs have different number of ABNC motors
Add number of connected ABNC motors in heating and in cooling output and use the highest number of motors (i.e. n = the highest number of motors connected to either heating or cooling outputs.
Example
Given: 4 ECC 22 connected to 14 ABNC motors (6 motors to heating and 8 motors to cooling).
Sizing
System description We recommend max. flow temperature not exceeding 65 °C.
To ensure hydraulic balance in the heating system max. differential pressure (Dp) across valves must not exceed 0.3 bar.
For optimal control we recommend heating systems with pre-set valves and weather compensation control.
High differential pressure should be avoided if the risk of noise is to be eliminated.
Differential pressures can be reduced using Danfoss AVDL, ASVP, AVP, AVPB, AVPQ or IVD pressure controls.
Two pipe heating systems
ECC 12
Variable volume control, heating
On room temperature fall ECC 12 controller and ABNC thermohydraulic motor will open control valve modulatingly to allow increased hot water flow through the heating coil. Reverse function will occur at room temperature rise.
Large systems will require flow and
differential pressure control. Consult Danfoss for further information.
Constant volume control, heating On room temperature fall ECC 12 controller and ABNC thermohydraulic motor will open KOVM valve, port (B) to allow increased hot water flow through the heating coil. Reverse function will occur at room temperature rise. As KOVM valve opens to allow increased hot water flow through the heating coil (B-AB) the built-in bypass (A-AB) closes.
Reverse function will occur at room temperature rise.
KOVM valve is fitted so that the bypass facility ensures constant circulating water flow, i.e. constant pump pressure.
Two-pipe cooling systems ECC 12 in cooling mode (ECC-R terminals 6 and 7 are connected)
Variable volume control, cooling
On room temperature rise ECC 12 controller and ABNC thermohydraulic motor will open control valve modulatingly to allow increased cooling water flow through the cooling coil. Reverse function will occur at room temperature fall.
Large systems will require flow and
differential pressure control. Consult Danfoss for further information.
Constant volume control, cooling
On room temperature rise ECC 12 controller and ABNC thermohydraulic motor will open KOVM valve, port (B) modulatingly to allow increased cooling water flow through the cooling coil. Reverse function will occur at room temperature fall.
As KOVM valve opens to allow increased cold water flow through the cooling coil (B-AB) the built-in bypass (A-(B-AB) closes. Reverse function will occur at room temperature fall.
KOVM valve is fitted so that the bypass facility ensures constant circulating water flow, i.e. constant pump pressure.
Two pipe change-over systems
ECC 12
Operation principle
Change-over cooling/heating system supplies hot or cold water.
The terminal unit controls consists of ECC 12 controller, ECC-R room control panel, ECC-S supply air temperature sensor and ABNC thermohydraulic motor. ECC 12 controller also requires a manual or an automatic switch function to distinguish cold water from hot water supply.
At cold water supply ECC-R room control panel terminals 6 and 7 are short-circuited by a SPDT-switch.
At hot water supply ECC-R room control panel terminals 6 and 7 must not be connected.
A surface thermostat mounted onto the supply pipes will indicate cold or hot water supply from the central system. Always mount surface thermostat onto supply pipes where circulation is constant to provide for correct control irrespective of coil load variations. Consider actual flow temperatures when selecting surface thermostat type, e.g. an adjustable surface thermostat with lock-up setting knob.
The surface thermostat switch must fit safety voltage 5V/150 mA.
Take care that room control panels have one change-over switch each.
Variable volume control
Heating
On room temperature fall ECC 12 controller and ABNC thermohydraulic motor will open the valve modulatingly to allow hot water flow through the.
Reverse function will occur at room temperature rise.
Cooling
On room temperature rise ECC 12 controller and ABNC thermohydraulic motor will open the valve modulatingly to allow cold water flow through the coil.
Reverse function will occur at room temperature fall.
Large systems will require flow and
differential pressure control. Consult Danfoss for further information.
Constant volume control
Heating
On room temperature fall ECC 12 controller and ABNC thermohydraulic motor will open the KOVM valve modulatingly to allow hot water flow through the coil passing valve ports B-AB and at the same time water flow through the built-in bypass A-AB will be reduced.
Reverse function will occur at room temperature rise.
Cooling
On room temperature rise ECC 12 controller and ABNC thermohydraulic motor will open the KOVM valve modulatingly to allow cold water flow through the coil passing valve ports B-AB and at the same time water flow through the built-in bypass A-AB will be reduced.
Reverse function will occur at room temperature fall.
KOVM valve is fitted so that the bypass facility ensures constant circulating water flow, i.e. constant pump pressure.
Four pipe two-heat-exchanger systems
ECC 22
Variable volume control
On room temperature rise ECC 22 controller and ABNC thermohydraulic motor will close the heating valve modulatingly to reduce water flow through the heating coil.
When room temperature continues to rise, the valve closes completely. The adjustable built-in neutral zone ensures that the valve remains closed until room temperature has increased by the degrees set on the
controller-front potentiometer. Any increase in excess of that allows the cooling valve to open modulatingly to increase cold water flow through the cooling coil.
Reverse function will occur at room temperature fall.
Large systems will require flow and
differential pressure control. Consult Danfoss for further information.
Constant volume control
On room temperature rise ECC 22 controller and ABNC thermohydraulic motor will close heating valve, ports B-AB, modulatingly to reduce water flow through the heating coil and at the same time increase water flow through the built-in bypass (A-AB). When room temperature continues to increase the valve closes completely. The adjustable built-in neutral zone ensures that the valve remains closed, until room temperature has increased by the degrees set on the controller-front potentiometer. Any increasse in excess of that allows the cooling valve, ports B-AB, to open modulatingly to conduct water flow through the cooling coil. At the same time water flow through the built-in bypass A-AB will be reduced.
Reverse function will occur at room temperature fall.
KOVM valve is fitted so that the bypass facility ensures constant circulating water flow, i.e. constant pump pressure.
Supply voltage 24 V~, ± 15 %
Frequency 50-60 Hz
Start-up power consumption 270 mA
Operation power consumption 70 mA
Ambient temperature 0-50 °C
Enclosure IP 40
Cable length 1200 mm
Data General data on ECC 12 and ECC 22
Supply voltage 24 V, 50-60 Hz
Power consumption 1.4 W
Voltage range 24 V, ± 15 %
Ambient operation temperature -10 to 50 °C
Enclosure DIN-rail mounting
Enclosure tightness IP 20
Sensor type NTC 12000 W at 25 °C
Storage temperature –20 - +50 °C
Output load Max. 1 ABNC per output
Control principle Double loop with P and PI
ECC 12
Number of outputs 2 heating or 2 cooling circuits
ECC 22
Neutral zone 0.5 - 5 K
Heating outputs 2 heating circuits
Cooling outputs 2 cooling circuits
Wiring
Note: On installation take an 8-wire cable
between ECC-R room control panel and ECC controller to prepare for nighttemperature -reduction and/or change-over function. For night-temperature-reduction or change-over function the used switch must fit safety voltage 5V/150 mA.
Take care that room control panels have one switch each both for night temperature reduction and change-over function.
Mounting and wiring ABNC
Dimensions
ECC
Dimensions
Dimensions
ECC-R
Dimensions
Dimensions D d2 H L DN ISO 7/1 RAV mmm mm 15 Rp 1/2 R 1/2 15/8 86 95 20 Rp 3/4 R 3/4 20/8 86 106 25 Rp 1 R 1 25/8 99 125 ABNC-RAV ABNC-RA2000 D d2 H L DN ISO 7/1 Type mm mm 10 Rp 3/8 R 3/8 92 75 RA-N, RA-FN 15 Rp 1/2 R 1/2 92 82 RA-U 20 Rp 3/4 R 3/4 97 98 25 Rp 1 R 1 RA-N, RA-FN 97 125 15 Rp 1/2 R 1/2 101 96 20 Rp 3/4 R 3/4 RA-G 104 107 25 Rp 1 R 1 109 125 ABNC-VMT b H L DN a ISO 228/1 VMT mm mm 15 Æ15, Æ16, Æ18 G 3/4 A 15/8 86 90 20 Æ18, Æ22 G 1 A 20/8 86 101 25 Æ28 G 1 1/4 A 25/8 99 120 D H DN KOVM ISO 7/1 mm 0.6 15 Rp 1/2 1.5 85 2.0 ABNC-KOVM
Design Valve bodies
Valve bodies are made of brass, pressure pin and spindle of chromium steel. Pressure pin operates in a life-time lubricated O-ring gland seal.
O-ring seals are made of EPDM rubber. KOVM valve cones are made of EPDM rubber, and RA 2000, RAV and VMT valve cones are made of nitrile rubber.
O-ring seals can be replaced without draining down the system.
Valve bodies are designed for and tested in air conditioning systems. A Danfoss FV strainer is recommended for valve protection.
Any water treatment or chemical cleaning agents should be free from mineral oil, which has a destabilising effect on EPDM rubber.
RAV, hot/cold water valve
VMT, hot/cold water valve
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material.
Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed.
Danfoss Randall Ltd.
Ampthill RoadBedford MK42 9ER
