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M M a a i i n n t t e e n n a a n n c c e e
Service Intervals
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 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 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 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 . .
D D r r i i v v e e c c o o o o l l i i n n g g f f l l u u i i d d a a n n d d s s t t r r a a i i n n e e r r m m u u s s t t b b e e s s e e r r v v i i c c e e d d
e e v v e e r r y y f f i i v v e e ( ( 5 5 ) ) y y e e a a r r s s . .
Interval
5 years
Drain and replace the drive cooling fluid
5 years
Replace the fluid strainer when servicing the fluid
Yearly
Perform a fluid pH test.
Unit Diagnostics
An improperly filled drive cooling system (either low
fluid level or entrapped air in the circuit) can result in
the AFD or output filter overheating. This condition
may result in the following diagnostics:
•
AFD Fault
•
Loss of Drive Cooling Control
If chiller diagnostics indicate a drive cooling system
problem, contact your local Trane Service Agency.
pH Test
Obtain a sample of fluid from the drive cooling loop via
the loop drain located near the discharge of the pump.
Test for pH level using litmus paper with a 0.5
resolution.
•
pH < 8 indicates fluid to be changed
Pressure Relief Cap
The pressure relief cap is an automotive style pressure-
vent radiator cap; refer to the following figure. The
setting for the relief spring is 16 lb (7.3 kg). The function
of the relief cap can be verified with a standard
automotive radiator cap tester.
64
Task
Figure 44. Pressure relief cap
Drive Cooling Expansion Tank
Proper fluid level is important to the operation of the
unit. To verify proper level, inspect the liquid level in
the fluid reservoir (located on the left side of the
electrical panel); refer to the following figure for fluid
levels under various temperature conditions. If levels
are low, contact your local Trane Service Agency.
Figure 45. Drive cooling expansion tank fill
Design Fill at
70°F (21.1°C)
Maximum Fill at
32°F (0.0°C)
N N o o t t e e : : Fill lines are NOT marked on the tank. The top
level is just below the upper fitting and the
bottom level is just above the lower fitting; the
middle level is midway between the two fittings.
Cleaning the Condenser
Condenser tube fouling is suspect when the
"approach" temperature (i.e., the difference between
Design Fill at
104°F (40.0°C)
Maximum Fill at
70°F (21.1°C)
Design Fill at
32°F (0.0°C)
Minimum Fill at
70°F (21.1°C)
HDWA-SVX001D-EN
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