Weekly; Monthly - Trane Arctic PolyTherm TP Series Installation, Operation And Maintenance Manual

Simultaneous chiller/heater

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Table Of Contents

Table of Contents

Table 14. Recommended chiller service intervals (continued)

Confirm and record compressor amperage draw and voltage

Compare water/glycol flow against design specifications

Tighten compressor rotalock nuts

Weekly

Weekly inspection is a continuation and elaboration of

daily best practice:

•

Inspect touchscreen interface panel for alarm status

and additions to the alarm history. (Do not clear

alarms as this is a very important performance

record if troubleshooting problems occur.)

•

Listen for excessive vibrations or motor noise. This

usually signals a loose brace or section of piping.

•

Measure all refrigerant static pressure on any idle

circuits. Record any significant changes or

reductions in pressure.

•

Clean strainers weekly during initial weeks after

initial start up until water quality has been reliably

established. Thereafter, inspect and clean strainers

at least monthly .

Monthly

The monthly maintenance inspection examines many

items that generally require frequent attention. This

routine event identifies small problems early before

they can become big problems requiring serious repair

and refurbishment:

1. Remove the strainer on the inlet water pipe to the

chiller/heater and verify that it is clean and free of

debris.

2. The 30 Mesh screen is made of SAE Grade 304

stainless steel. Clean the interior of the end cap (or

service cap), and the gasket using a soft natural

bristle brush and tap water. If fine particles cannot

be removed with the water stream, use a mild

detergent and a non-abrasive brush to remove

them.

3. Check the compressor oil level sight glass. The oil

should always be clear and free-flowing. Any milky

or "slow rolling" effect indicates that liquid

refrigerant is making its way back into the

compressor and will cause premature compressor

failure.

N N O O T T I I C C E E

E E q q u u i i p p m m e e n n t t D D a a m m a a g g e e ! !

F F a a i i l l u u r r e e t t o o r r e e m m o o v v e e m m o o i i s s t t u u r r e e f f r r o o m m s s y y s s t t e e m m c c o o u u l l d d

c c a a u u s s e e c c o o r r r r o o s s i i o o n n w w i i t t h h i i n n t t h h e e c c h h i i l l l l e e r r / / h h e e a a t t e e r r

c c o o m m p p o o n n e e n n t t s s , , a a n n d d d d e e g g r r a a d d e e p p e e r r f f o o r r m m a a n n c c e e . .

P P e e r r f f o o r r m m v v a a c c u u u u m m e e v v a a c c u u a a t t i i o o n n o o f f s s y y s s t t e e m m t t o o r r e e m m o o v v e e

m m o o i i s s t t u u r r e e . .

ARTC-SVX005B-EN

Task

4. When the compressor is not operating, the oil level

should be at least at the bottom of the sight glass,

up to two-thirds full. When the compressor is

operating, the oil level will normally be at the

bottom of the sight glass, or even below, but it

must be visible.

5. Low oil sight glass conditions could signify an

undercharged chiller that lacks proper refrigerant

velocity to return oil to the compressor sump.

Eventually, dry compressor starts could occur

causing premature compressor failure. This may

indicate that some oil has been lost from a previous

refrigerant leak repair. The compressor data label

indicates the correct oil type and quantity with

which it should be filled.

N N o o t t e e : : A flashlight may be required to see the oil

C C o o m m p p r r e e s s s s o o r r F F a a i i l l u u r r e e ! !

F F a a i i l l u u r r e e t t o o f f o o l l l l o o w w i i n n s s t t r r u u c c t t i i o o n n s s b b e e l l o o w w c c o o u u l l d d r r e e s s u u l l t t i i n n

c c a a t t a a s s t t r r o o p p h h i i c c c c o o m m p p r r e e s s s s o o r r f f a a i i l l u u r r e e . .

D D o o n n o o t t o o p p e e r r a a t t e e w w i i t t h h i i n n s s u u f f f f i i c c i i e e n n t t o o i i l l . .

6. Check the glycol concentration using a

refractometer.

C C o o m m p p r r e e s s s s o o r r D D a a m m a a g g e e ! !

F F a a i i l l u u r r e e t t o o f f o o l l l l o o w w i i n n s s t t r r u u c c t t i i o o n n s s b b e e l l o o w w c c o o u u l l d d r r e e s s u u l l t t i i n n

e e x x t t e e n n s s i i v v e e c c o o m m p p r r e e s s s s o o r r d d a a m m a a g g e e . .

V V e e r r i i f f y y t t h h a a t t s s u u c c t t i i o o n n p p r r e e s s s s u u r r e e i i s s s s u u f f f f i i c c i i e e n n t t . . S S e e c c u u r r e e

t t h h e e c c i i r r c c u u i i t t o o r r m m o o d d u u l l e e o o f f f f l l i i n n e e u u n n t t i i l l s s t t a a t t u u s s c c a a n n b b e e

e e x x a a m m i i n n e e d d i i n n d d e e t t a a i i l l . .

7. Check the refrigeration pressures.

8. For R410A refrigerant, low pressure refrigeration

gauge should read 120 to 160 psi and high pressure

refrigeration gauge should read 300 to 450 psi.

I I m m p p o o r r t t a a n n t t : : Suction pressures below 90 psi (R410A) is a

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

churning in the sump of the compressor.

Adjusting the line of sight may be necessary to

visually inspect the oil in the compressor sump

during operation. At a minimum, the oil must be

seen churning in the compressor sump. It should