Compressor Tasks - Trane Arctic Manhattan Gen II Installation, Operation And Maintenance Manual

Air-cooled modular chiller

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Table of Contents

M M a a i i n n t t e e n n a a n n c c e e P P r r o o c c e e d d u u r r e e s s

5. For extremely dirty coils, chemical soaking may be

required to loosen debris build-up. Apply chemicals

with a hand-held pump sprayer following a similar

pattern used in the water cleaning.

6. Let the chemical mixture soak in the evaporator for

a short period of time to loosen sediment and scale

build-up. Trane recommends using straight tap

water except in extreme cases. (Take extra

precautions by covering electrical components with

plastic bags, etc.)

7. After chemical cleaning, all surfaces must be

flushed thoroughly with clean water to remove

residual chemicals. Trace chemical residue may

result in premature aluminum fin breakdown and

deterioration requiring coil replacement.

8. Securely reinstall fan grill assembly (or V-baffle end

cap).

9. Turn power back on individual unit after ensuring

all electrical connections are wiped dry.

10. Ensure that each unit's panels are clean and clear of

debris.

Evaporator Cleaning Procedure

Fouling of evaporators will result in a gradual decline in

performance of the chiller.

1. Isolate each evaporator using the isolation valves.

2. Back flush using the city water supply forced to a

drain.

3. A brazed-plate evaporator is cleaned by back

washing which is forcing a cleansing water/glycol

mixture backwards through it at higher than normal

pressures.

4. Flushing should take place across a maximum 30

Mesh screen filter/strainer with frequent screen

cleaning to remove the debris from the chiller.

Flushing should continue until the screen is clean.

After detergent and chemical cleaning, flush the

piping for a minimum of one hour with fresh water

to remove any remaining cleaning compounds.

Compressor Tasks

The Manhattan™ Gen II Chiller has been designed for

ease of maintenance access. When properly positioned

within a machine room or space, Copeland

compressors can be quickly removed for repair or

replacement. (See

"Site Preparation and

Clearances," p.

14).

Remove Compressor

Verify that power is turned OFF via the chiller module

breaker that is found in the power distribution panel.

Confirm module power is OFF by testing with known

operational voltmeter. Once confirmed, install lockout/

tagout equipment to ensure power is not turned on

while service work is being performed.

W W A A R R N N I I N N G G

H H a a z z a a r r d d o o u u s s V V o o l l t t a a g g e e ! !

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l l o o c c k k o o u u t t / / t t a a g g o o u u t t p p r r o o c c e e d d u u r r e e s s t t o o e e n n s s u u r r e e t t h h e e p p o o w w e e r r

c c a a n n n n o o t t b b e e i i n n a a d d v v e e r r t t e e n n t t l l y y e e n n e e r r g g i i z z e e d d . . V V e e r r i i f f y y t t h h a a t t n n o o

p p o o w w e e r r i i s s p p r r e e s s e e n n t t w w i i t t h h a a v v o o l l t t m m e e t t e e r r . .

1. Close the suction and discharge rotalock valves.

Firmly front-seat both rotalock valves clockwise.

N N o o t t e e : : Do not over-tighten as the valve can become

difficult to loosen if over-tightened.

2. Recover the remaining refrigerant charge from the

compressor using a suitable recovery machine and

a clean recovery cylinder that is pressure rated for

the refrigerant being removed. Weigh refrigerant

charge that was removed.

3. Remove all compressor electrical wiring, as well as

safety and crankcase heater wiring. Make sure to

notate all connection points for the new installation.

N N o o t t e e : : Be sure to document conductor/wire numbers

and their corresponding termination points.

4. Using a spud wrench, remove the rotalock nuts

from the compressor.

5. Remove the four compressor mounting bolts from

frame using two 1/2 inch sockets, or a socket and a

wrench. (Install the nuts underneath the frame.)

6. Remove the compressor from the module.

Install Compressor

Verify that power is disconnected from the chiller.