Dry Air System (2020) Installation Procedure

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Doc #: 2100-AD-015-0107

Revision:

-Dry Air System (2020) Installation

Procedure

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Contents

Revision History ... 3 1.0 Purpose ... 4 2.0 Applicable To ... 4 3.0 Scope ... 4 4.0 Definitions ... 4 5.0 Training ... 4 6.0 Safety ... 4

7.0 Personnel, Equipment and Material Required ... 5

8.0 Procedure ... 6

9.0 Procedure Review ... 17

10.0 Records ... 17

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Revision History

REV

Date

Approved

Sections

Affected

Reason for Change

Remarks and/or Change Details

Name

- 9/1/2020 Initiated M. Evatt

Approved by:

Matt Evatt

Name, ME Title

John Donaldson

Name, EL Maint

Dick Joyce

Name, SciOps

Tammie Lavoie 1 September 2020

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1.0

Purpose

This document contains the installation procedure for the new dry air system for the DESI

instrument on the Mayall telescope with future provision to supply dry air to the DESI Spectrograph Enclosure located in the Large Coude Room on the Main Floor.

In late 2019 and early 2020, it was found that the existing dry air system supplying air to the Mayall telescope, the DESI instrument, and the DESI Spectrograph Enclosure was contaminated with substances that were being transferred to cold surfaces in the focal plane enclosure. The decision was made to disconnect the existing dry air system from DESI and the spectrograph enclosure, and to install a completely separate new system to provide dry air to those points of use.

2.0

Applicable To

Mayall 4-meter telescope

3.0

Scope

The scope of this document covers the installation of the new Dry Air system for the DESI

instrument and the Spectrograph Enclosure. It includes demolition of the existing contents of Dark Room 1 on the Main Floor of the Mayall and the installation of compressors, tubing, hoses, dryers, filters, valves, and all other in-line equipment. It also includes the installation of new electrical service in Dark Room 1 from the nearest and most convenient source of the required electrical power.

4.0

Definitions

4.1

5.0

Training

5.1 Overhead crane operations 5.2 Rigging

5.3 Crane Personnel Basket Training

6.0

Safety

Regular paragraph

6.1 Daily Briefing Form

6.2 Crane S.O.P. checklist (1000-AD-015-0010) 6.3 Electrical Safety

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7.0

Personnel, Equipment and Material Required

Task

[Refer to Section 8]

Prsnl Skills Req’d Equipment, Tools, Supplies Notes

8.1 Demolition in

Darkroom 1 1 General mechanical

Reciprocating Saw

Reciprocating Saw Blades Suitable for cutting through wood and nails

Extension cord, 15 ft long min Sufficient gauge to run reciprocating saw Pry bars (2 EA)

Hand drill Battery operated, with charged battery

Driver set for drill, including bit holder, multiple Philips and flat bits.

Ear Plugs

Protective work gloves Safety glasses

Dust mask Vacuum Cleaner

Tool kit w/standard tools (screw drivers, crescent wrenches, allen keys, hammer, etc.)

8.2 Run power to

Darkroom 1 1 Electrician

Conduit / Conduit Fittings

Wire

Junction box and appropriate breakers

Conduit hangers and hardware

Drill motor Battery operated, with charged battery

Stepped bit

Driver set for drill, including bit holder, multiple Philips and flat bits.

Ear Plugs

Protective work gloves Safety glasses

Tool kit w/standard tools (screw drivers, crescent wrenches, allen keys, hammer, etc.)

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8.3/8.4 Move Compressor 1/2 from ground floor to main floor

1 Facilities Mech

Knife to cut plastic wrap

Strapping cutters Claw hammer

Pry bar

½” or 3/8” ratchet with Imperial socket set including a ¾” socket

Combination wrench set, Imperial

Furniture dollies (2 EA) with ¾” plywood decks attached to the tops

Light rope, 10 or 15 ft Protective work gloves Safety glasses

Tie Wraps, or ½” dia x 2 inch long lag bolts (4 EA)

Drill motor Battery operated, with charged battery

Drill bits (sized for pilot holes for 1/2” lag bolts

Floor plates for elevator thresholds

Check to make sure they are there 8.5 Anchor Compressors to floor of Dark Room 1 1 Facilities Mech

Marker to mark floor 4 EA ½-13 x 4-1/2 Lg Steel Anchor Bolts (including nuts, washers)

McMaster Carr 91578A117

Hammer Drill

Masonry Bit, ½” 3/4” Wrench to Mount Compressors

8.6 Assemble and Mount Dry Air Mounting Board of Wall of Dark Room 1

1 Facilities Mech

Dry Wall Anchors Drill

XX” Anchor Bolts Drill Bits

All Components listed in drawing 2100-ME-020-0058 Teflon Tape

½”, ¾” Wrenches Box Wrench Set 6’ Ladder/Step Stool

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8.7/8.8 Install Ultra High Purity Stainless Steel Tubing/fittings

1 Facilities Mech

Unistrut/Ceiling Tube Support Unistrut Anchors/Drywall Anchors

Swagelok Gap Inspection Tool for ¾” fittings.

This isn’t included in the “TOOL KIT SMALL”

Swagelok Toolkit PN “TOOL KIT SMALL” Unistrut Clamps

Crescent Wrench/Box Wrench Socket Set

All Components listed in drawing 2100-ME-020-0058 6’ Ladder/Step Stool Combination wrenches, 1-1/16” and 1-1/8”

For ¾” Swagelok Tubing Fittings

Drill and Tap Mounting Bracket 2100-ME-020-0060

8.9 Install Ultra High Purity Stainless Steel Braided Flex Hose through Polar Axis

3 Facilities Mech

Magnetic LED Drop Lights QTY: 4 Spot Lights QTY: 4 Headlamps

Extension Cords QTY: 3 Set Standard Allen Wrench

Set

T- Handle

Swagelok Toolkit

10’ Light Weight Rod Feed line through Polar Axis PVC Tape

6’ Ladder Accessing Polar Axis from Behind Telescope Tie Wraps 8.10 Install Ultra High Purity Stainless Steel Tubing/fittings 3 Facilities Mech Unistrut QTY: 3

2100-ME-020-0057 – Item 41 Transition Mount Tubing and Fittings (Box for

PFA Tube to Rigid Tube at HA Wrap)

Swagelok Toolkit Drill and Tap 8.11 Install UHP

SST Tubing and fittings from elliptical tube exit to tubing support at tube / Dec Wrap PFA soft tubing transition.

3 Facilities Mech

Unistrut QTY: 3

2100-ME-020-0057 - Item 41 Transition Mount 2100-ME-020-0057 – All items

in details J and T (Box for Elliptical Tube to Horseshoe)

Tubing and Fittings

Drill and Tap Fall Protection

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8.12 Install Item 25 Transition on Bracket Assembly on Center Section 2 Facilities Mech 2100-ME-020-0057 Item 25 Transition Bracket Assembly Drill and Tap

Fall Protection Swagelok Toolkit Drill and Tap Transfer Punch

All tubing and fittings shown in 2100-ME-020-0057 Detail L

8.13 Install tubing and clamps along SW-to-S Serrurier Truss leg to Top Ring

3 Facilities Mech, Mech Engineer

Fall Protection Swagelok Toolkit

Clamps 2100-ME-020-0057 Items 44 and 45 (two each)

Man Basket Person in basket will operate crane; must be experienced in crane Dome Crane operation. Fall Protection

PFA tubing cutters

Conduit clamps sized for ½” tubing

Hand drill, drill bits and taps for

Scissor lift

PFA Tubing roll Sufficient length to go from top ring mounted panel to the contamination monitor in the Cass cage. 8.14 Install 2100-ME-020-0057 Item 43 1 Facilities Mech 2100-ME-020-0057 Item 43 Panel Swagelok Toolkit

Weight plate for Cass Cage floor

Standard tools (Crescent wrench, SAE box end wrenches)

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8.0

Procedure

8.1 Demolition in Dark Room 1

8.1.1 Clean out Darkroom 1 – remove all loose items that are in the way. The large magnet that’s in the room should be on a different countertop out of the way. 8.1.2 Using the reciprocating saw and pry bars, remove the floor cabinets and

countertop shown in the hatched area in Figure 2. Figure 1. Location of Dark Room 1

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8.1.3 Remove the demo’d items from the room and place them on the main floor near the trash ready to be taken down.

8.1.4 Remove any existing air lines that are mounted on the east wall in the location where the Air Dryer Mounting Board will be mounted by turning off the air to the line, cutting it as required, and installing a cap on the open line.

8.2 Run power to Darkroom 1

8.2.1 Electrician to determine breaker location, run appropriate conduit, install disconnect in Darkroom #1, install outlets in Darkroom #1, install cords on compressors.

8.3 Move Compressor 1 from Ground Floor to Main Floor

8.3.1 Using a knife, strapping cutters, a hammer, and pry bars as required, unpack one of the air compressors.

8.3.2 Place one furniture dolly under each set of feet, similarly to Figure 3. Note that it may be necessary to use one of the bridge cranes in the garage to lift the compressor up; if so, rig as required using the rigging on the rack in the garage.

8.3.3 Using the ½” lag bolts, bolt the compressor feet to the furniture dollies. Alternately, use the tie wraps to secure the compressor feet to the furniture dollies. The lag bolts will probably be better.

8.3.4 Making sure the compressor is stable on the dollies, wheel it to the staff elevator. Use the sheet metal ramp to assist in getting the compressor safely over the elevator threshold. Go up to the U or P floor.

8.3.5 Use the sheet metal ramp to transfer the compressor from the staff elevator to the upper staff hydraulic elevator. Go up the main floor.

8.3.6 On the main floor, go out the REAR of the elevator into the hallway. Use the sheet metal ramp to move the compressor out of the hydraulic elevator. 8.3.7 Wheel the compressor through the hallway into the door of Darkroom 1. 8.3.8 Once the compressor is in Darkroom 1, remove the lag bolts.

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8.3.9 If it doesn’t seem possible to kick the first dolly out from under the

compressor while lifting it up, tie the thin rope to the front of that dolly so the dolly can be pulled out.

8.3.10 Lift one end of the compressor (careful; it weighs > 260 lbs) and get the dolly out from under the compressor feet. Gently set that end of the compressor down on the ground.

8.3.11 Go to the other end of the compressor and repeat the lift-remove dolly-set down sequence again.

8.4 Move Compressor 2 from Ground Floor to Main Floor

8.4.1 Using a knife, strapping cutters, a hammer, and pry bars as required, unpack one of the air compressors.

8.4.2 Place one furniture dolly under each set of feet, similarly to Figure 3. Note that it may be necessary to use one of the bridge cranes in the garage to lift the compressor up; if so, rig as required using the rigging on the rack in the garage.

8.4.3 Using the ½” lag bolts, bolt the compressor feet to the furniture dollies. Alternately, use the tie wraps to secure the compressor feet to the furniture dollies. The lag bolts will probably be better.

8.4.4 Making sure the compressor is stable on the dollies, wheel it to the staff elevator. Use the sheet metal ramp to assist in getting the compressor safely over the elevator threshold. Go up to the U or P floor.

8.4.5 Use the sheet metal ramp to transfer the compressor from the staff elevator to the upper staff hydraulic elevator. Go up the main floor.

8.4.6 On the main floor, go out the REAR of the elevator into the hallway. Use the sheet metal ramp to move the compressor out of the hydraulic elevator. 8.4.7 Wheel the compressor through the hallway into the door of Darkroom 1. 8.4.8 Once the compressor is in Darkroom 1, remove the lag bolts.

8.4.9 If it doesn’t seem possible to kick the first dolly out from under the

compressor while lifting it up, tie the thin rope to the front of that dolly so the dolly can be pulled out.

8.5 Mount Compressors 1 and 2 in Dark Room 1.

8.5.1 Position Compressor 1 and 2 in mounting location. 8.5.2 Mark floor hole location.

8.5.3 Position compressor to allow room to drill holes. 8.5.4 Anchor compressors to floor.

8.6 Assembly and Installation of Air Dryer Mounting Board on wall of Dark Room 1 8.6.1 Mark mounting hardware locations on east wall of Darkroom 1 using a

template. Drill pilot holes at those locations ensuring the holes go into studs behind the wall.

8.6.2 Make a template from the hole locations in the wall.

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8.6.4 Mount board on wall.

8.6.5 Assemble all components on the mounting board as shown on drawing 2100-ME-020-0058.

8.7 Install Ultra High Purity Stainless Steel Tubing/Fittings from Compressor(s) to Dry Air Mounting Board

8.7.1 Mount Unistrut Tube Support to Ceiling in 3 places, according to Drawing: 2100-ME-020-0058

8.7.1.1Use self-tapping screws or drill and tap holes or use beam clamps.

8.7.2 Cut tubing to size, bend/form and install with fittings according to drawing. 8.7.2.1Install Teflon tape on all threads

8.7.2.2Mount to Unistrut using hangers

8.8 Install Ultra High Purity Stainless Steel Tubing/Fittings from Dry Air Mounting Board to Polar Axis of the Telescope

8.8.1 Mount 3 Unistrut for supporting the stainless-steel tubing according to drawing detail C-C

8.8.1.1Using Drywall Anchors

8.8.2 Drill hole through wall according to detail 8 on drawing 2100-ME-020-0058 8.8.2.11” Hole Saw

8.8.3 Cut, Bend/Form and Mount Stainless Steel Tubing and Fittings from Dry Air Mounting Board through hole according to drawing.

8.8.4 Mount 2 Unistrut for supporting the stainless-steel tubing according to drawing detail D-D

8.8.4.1Using Drywall Anchors

8.8.5 Install bracket 2100-ME-020-0060, detail item 24 according to detail E 8.8.6 Cut, Bend/Form and Mount Stainless Steel Tubing and Fittings from through

hole to bracket mounted at Polar Axis of Telescope according to drawing. 8.8.6.1Mount to Unistrut using hangers.

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8.9 Install Ultra High Purity Stainless Steel Jacketed Flex Line through the Polar Axis 8.9.1 Lock-out tag-out Telescope Drives and Oil Pumps.

8.9.2 Stage lighting: behind telescope pointing up through the polar axis, inside the elliptical tube, inside the polar axis. Use battery powered magnetic lighting. Spot lights on mezzanine, behind telescope and within elliptical tube. 8.9.3 Stage Tools: Ladder/10’ Pole behind telescope, Allen Wrenches/Tie

Wraps/Tape/Cutters inside Elliptical tube, Hose on mezzanine level.

8.9.4 Position participant within the elliptical tube by south journal. Position Safety Watch on Horseshoe Catwalk. Position Participant on Mezzanine.

8.9.5 Participant on Mezzanine to hand hose through portal on back side of the South Journal to participant within the South Journal. Refer to Figure 4. 8.9.6 Participant within South Journal to stage hose within the South Journal, either

in a drape or coil to prepare to feed it down the Polar Axis.

8.9.7 Participant on Mezzanine to restage behind telescope on 6’ ladder. Pass the 10” pole through the Polar Wrap-up.

8.9.8 Participant within the Polar Axis to guide the pole through the Polar Wrap-up. This participant may have to partially crawl through the rectangular hole to access the Polar Wrap-up. Refer to Figure 4.

8.9.9 Participant within the Polar Axis to tape and secure the end of the hose to the pole.

8.9.10 Participant behind the telescope to pull the pole back through, while the participant within the South Journal helps guide the hose through as it is being fed down to behind the telescope.

8.9.11 Secure hose end to the previous run hard line at the junction mounted to the bracket.

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8.9.12 Secure the hose to the first clamp behind the telescope at the entrance to the Polar Wrap-up.

8.9.13 Participant within the South Journal to check and ensure adequate slack in the hose for proper operation, and secure it to the last two clamps of the Polar Wrap-Up.

8.9.14 Secure any excess droop of the hose within the Elliptical tube.

8.10 Install Ultra High Purity Stainless Steel Tubing/Fittings within the Elliptical Tube. 8.10.1 Mount 3 Unistrut for supporting the stainless-steel tubing according to

drawing detail F-F. May be able to secure to AC Cable Mounts. 8.10.1.1 Drill and Tap holes for mounting the Unistrut.

8.10.2 Mount Transition Bracket 2100-ME-020-0068 in location according to drawing 2100-ME-020-0058.

8.10.3 Hoist the High Purity Stainless Steel Tubing by hand into the elliptical tube, handing it off from person to person.

8.10.3.1 Position one participant on the Catwalk in front of the North Journal. Position one participant on the Horseshoe Catwalk. Position one participant within the Elliptical tube.

8.10.4 Secure the end of the Tubing to the Soft Line at the Transition Mounting Bracket.

8.11 Install UHP SST Tubing and fittings from elliptical tube exit to tubing support at tube / Dec Wrap PFA soft tubing transition. This operation will require one person on the Absolute Dec Encoder Access Platform, one person inside the Elliptical Tube, and a Safety Watch located on the C-Floor.

8.11.1 Install Unistrut support and Item 41 Transition Assembly on the Horseshoe per Detail J.

8.11.1.1 One person to stand on the Absolute Dec Encoder Access Platform with fall protection.

8.11.1.2 Safety watch on the C-floor.

8.11.2 Assemble “L” section consisting of Items 34 and 30 using right angle fittings Item 37.

Note: It may be necessary to install Item 33 onto this assembly in order to avoid having to reach through the cutout in the elliptical tube to connect it, but that may make installing the “L” section as an assembly impossible. This is a question that will be answered during the pre-work site survey.

8.11.2.1 One person to stand on the Absolute Dec Encoder Access Platform with fall protection.

8.11.2.2 One person inside the elliptical tube with a fall protection harness to facilitate extraction in case of an emergency.

8.11.2.3 Safety watch on the C-floor.

8.12 Install Item 25 ½ Inch Transition Bracket Assembly (shown in Figure 6) on the center section. Note that the entire assembly including the bracket, all fittings, and the valve can be assembled ahead of time.

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8.12.1 Mark holes using transfer punch 8.12.2 Drill and tap bolt holes

8.13 Install both the ½” stainless supply tubing, the flexible PFA contamination monitor tubing, and clamps on SW to S Serrurier Truss leg as shown in Detail P of 2100-ME-020-0057.

8.13.1 Prepare Man Basket for use by one person. Ensure all required tools are in the basket.

8.13.2 Install 2 EA Item 44 clamps on the SW to S Truss while standing on the center section, approximately in the locations shown on the drawing.

8.13.3 Rotate the telescope all the way to the south, as close to the railing as possible.

8.13.4 Install 2 EA Item 45 Truss Clamps on the SW to S truss close to the ring, approximately in the locations shown on the drawing.

8.13.5 Rotate the telescope back to zenith

8.13.6 Position one person on the Center Section with the 20 ft piece of ½” tubing (2100-ME-020-0057 Item 32)

8.13.7 Position one person in the Man Basket (with crane controls)

8.13.8 Maneuver Man Basket south of telescope; bring low enough to receive 20 ft piece of tubing from person on Center Section deck. Center Section person to continue holding end of tubing to help control it.

8.13.9 The two people position the tubing on the truss and the person on the center section secures it on the bottom in the lowest clamp.

8.13.10 The person in the man basket secures it to the middle clamp, then the top clamp.

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8.13.11 The person in the man basket can then lower the end of the PFA tubing down to the person on the center section; both people can then install the tubing in the tubing clamps on the truss.

8.13.12 Man basket can then be returned to the floor.

8.13.13 Install 2100-ME-020-0057 Item 36 tubing from Center Section

Transition Bracket Assembly to bottom of 20 ft length of tubing on truss. This will require multiple bends.

8.13.14 Run the PFA tubing down the south or south west face of the center section to the Cass cage. Use conduit clamps to secure the tubing.

8.13.14.1 Rotate the telescope south as required, using the scissor lift to access the south or southwest face.

8.13.14.2 Drill and tap holes for conduit clamps in appropriate locations to secure the PFA tubing.

8.13.14.3 Install a valve at the junction between the upper and lower shells to facilitate primary mirror removal. Drill and tap holes for conduit clamps above and below this junction. Install fittings so the valve stays on the upper shell when the line is separated.

8.13.14.4 Continue running the PFA Tubing into the Cass cage, securing it with cable ties. Run it to the location for the contamination monitor. 8.13.15 Install the contamination monitor and power supply as detailed in

drawing 2100-AD-020-0057. Plumb the PFA tubing into a valve, then connect the valve to the monitor as shown.

8.14 Install 2100-ME-020-0057 Item 43 Manifold Panel on Ring.

8.14.1 Install one weight plate in the Cassegrain cage on the floor. 8.14.2 Rotate telescope to SE Annex

8.14.3 Install SE Annex stay bar

8.14.4 Disassemble 2100-ME-020-0057 Item 43 Manifold Panel for ease of installation on the telescope.

8.14.5 Install bare panel on Top Ring in location shown on drawing 8.14.6 Assemble flow components and tubing on panel

8.14.7 Bend and install tubing from panel back to 20 ft section of tubing affixed to truss leg as required.

8.15 Install PFA Tubing from 2100-ME-020-0057 Item 43 Manifold Panel to corrector and FPE along the same vane the lines are currently run along. Affix tubing clamps to top of ring as required, using the tubing clamps that are currently in place.

8.15.1 Replace all fittings at the corrector and at the FPE, including the in-line filters. 8.15.2 All fittings, hose, and other parts inside the FPE will be detailed in another

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9.0

Procedure Review

As required.

10.0

Records

11.0

Job Hazard Analysis

JHA Preparation Instructions: JHAs are to be prepared by the Supervisor or Group Manager in charge of the work, with work group member participation. The goal of preparing a JHA is for those responsible for or performing any work to review the risks and possible complications of that work and to consider ways of mitigating those risks and complications. A JHA shall be completed for all work executed. The JHA## is to be incremented when a procedure requires more than one JHA form. “Standing” should be marked if job or task is performed regularly and work group members are always the same individuals. Supervisors are responsible for getting the work group members sign off completed and a copy sent to the safety officer for each JHA.

JHA Change Instructions: If changes to the content of this JHA are required, follow the KPNO ETS Engineering Change Process. The master copy of the document must be checked out of the Document Vault, an Engineering Change form must be completed, and the Revision Table (see last page) must be updated. Note that periodic reviews of this JHA that do not result in content changes require only entry of the review date and the name of the reviewer in the Revision Table; the document revision should not be advanced in this case.

JHA Number: 2100-AD-015-0107-JHA Standing: N/A

Date Completed: 31 October 2019

Title of Job or Task: Dry Air System (2020) Installation Procedure Location/Facility: KPNO 4-meter Telescope

Supervisor or Person

Completing this JHA: Richard Joyce Person(s) Assisting

with this JHA: David Sprayberry, Tammie Lavoie

Recommended Personal Protective Equipment (PPE): select area above line to make entry

Head Protection Eye Protection X Hand and body Protection X Fall Protection X

Foot Protection X Hearing Protection X Respiratory Protection Special PPE:

Notes:

*Hard hats must be used whenever someone is working above you or at your head height, or when working with suspended loads.

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Equipment or tools needed to perform the job: tab or select to make entry in next location, only use if not listed in procedure.

Hazard Analysis Instructions: Complete the table below with the basic job steps, stating the hazards present and safe procedures or precautions to control the hazards for each step. Tab will move to next column; to add rows place cursor outside table on the right, and press ENTER.

Basic Job Steps: Review the activity and divide it into basic steps.

Hazards Present in Each Job Step: Identify the hazards or the possible danger present for each basic job step.

Correct and Safe Procedures and Precautions: Decide what actions or procedures are necessary to control and minimize the hazardspresent.

Things to consider:

Use designations in the “Hazards Present”

column:

Do employees know how to do the job? AX – Asphyxiation HS – Heat stress What are the hazards? Include people and equipment. BR – Burn Hazard R – Repetitive Motion How can injuries or accidents occur? CB – Caught Between SA – Struck Against How can injuries or accidents be prevented? CBY – Contacted By

CS – Confined Space SB – Struck By Are there obvious unsafe conditions? CI – Caught In SE – Stored Energy Are special tools needed? CO – Caught On SL – Suspended Load Do people need personal protective equipment? CW – Contact With TH – Trip Hazard How would we rescue people if something went

wrong?

E – Exposure to Chemicals, Noise, Vibration, Radiation Do we have the equipment to rescue? EL – Electrical

ER – Ergonomics FB – Fall to Below FH – Fire Hazard

Item

No. BASIC JOB STEPS

HAZARDS PRESENT IN EACH JOB STEP

CORRECT AND SAFE PROCEDURES AND PRECAUTIONS

8.1 Demolition in Dark Room 1 E, EL,

- Wear earplugs, safety glasses, and gloves while using the reciprocating saw - Be aware of what you’re

cutting into – make sure there are no energized electrical lines or pressurized air lines.

8.2 Run power to Dark Room 1 EL

This task is to be done by an electrician; all standard electrical safety measures must be observed.

8.3/8.4 Move Compressors E, ER

- Be cautious when lifting heavy compressors to avoid lifting injuries

- Be careful not to allow compressor to fall on you.

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Item

No. BASIC JOB STEPS

HAZARDS PRESENT IN EACH JOB STEP

CORRECT AND SAFE PROCEDURES AND PRECAUTIONS

8.5 Mount Compressors in Dark Room 1 SL Wear earplugs, safety glasses, and gloves while drilling holes in floor

8.6 Assembly and installation of Air Dryer

Mounting Board on wall E, ER

- Wear earplugs, safety glasses, and gloves while drilling holes in board and in wall

- Use caution lifting board to avoid injury

8.7 Install tubing from compressor to dry air

mounting board E

- Wear safety glasses and gloves while cutting tubing. 8.8 Install tubing from dry air mounting

board to polar axis E, FB

- Wear safety glasses and gloves while cutting tubing - Use caution when working

from ladders

8.9 Install flex line through Polar Axis CF

- Other people will be in close enough proximity to assist in the event of a problem.

- Refer to 1000-AD-015-0005 Confined Space SOP

8.10 Install stainless rigid tubing inside the

Elliptical Tube. CF, E

- Other people will be in close enough proximity to assist in the event of a problem.

- Personnel inside elliptical tube to wear FP harness to assist with extraction if required.

- Refer to 1000-AD-015-0005 Confined Space SOP - Use safety glasses while

drilling and tapping holes if required

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Item

No. BASIC JOB STEPS

HAZARDS PRESENT IN EACH JOB STEP

CORRECT AND SAFE PROCEDURES AND PRECAUTIONS

8.11

Install rigid stainless tubing between elliptical tube and entrance to west dec wrap

FB, E, SB

- Fall protection required for personnel on the Encoder Access Platform.

- Personnel inside elliptical tube to wear FP harness to assist with extraction if required.

- Use safety glasses while drilling and tapping holes if required.

- Personnel to stay out of area below work zone to avoid dropped tools, etc.

8.12 Install Transition Bracket on Center

Section E, TH, SB

- Use safety glasses while drilling and tapping holes. - Avoid trip hazards on top of

the center section. - Personnel to stay out of

area below work zone to avoid dropped tools, etc.

8.13 Install clamps and tubing on Serrurier

Truss. FB, SB, SL

- Requires use of Man Basket; must use fall protection - Personnel to stay out of area below work zone to avoid dropped tools, etc. - Man Basket is a suspended

load; do not mover under the suspended load.

8.14 Install Manifold Panel on Ring E - Use caution lifting heavy

weight for cass cage bottom

8.15 Install PFA tubing on vanes FB

- Work must be done from scissor lift; FP must be worn.

- Personnel to stay out of area below work zone to avoid dropped tools, etc.

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WORK GROUP MEMBERS FOR THIS JHA

I understand & will adhere to the steps, hazards & controls as described in this JHA. I understand that performing steps out of sequence may pose hazards that have not been evaluated, nor authorized. I will contact my supervisor prior to continuing work, if the scope of work changes or new hazards are introduced. I understand I have the authority and responsibility to stop work if I believe it to be unsafe.

NAME (print) SIGNATURE DATE

1 2 3 4 5 6 7 8 9 10 SUPERVISOR IN CHARGE

I have reviewed the steps, hazards & controls described in this JHA with all workers listed above and authorize them to perform the work. Workers are qualified (i.e. licensed or certified, as appropriate, & in full compliance with NOAO training requirement(s) to perform this activity.

NAME SIGNATURE DATE

Figure

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References

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