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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 ! !
F F a a i i l l u u r r e e t t o o d d i i s s c c o o n n n n e e c c t t p p o o w w e e r r b b e e f f o o r r e e s s e e r r v v i i c c i i n n g g 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 d d e e a a t t h h o o r r s s e e r r i i o o u u s s i i n n j j u u r r y y . .
D D i i s s c c o o n n n n e e c c t t a a l l l l e e l l e e c c t t r r i i c c p p o o w w e e r r , , i i n n c c l l u u d d i i n n g g r r e e m m o o t t e e
d d i i s s c c o o n n n n e e c c t t s s b b e e f f o o r r e e s s e e r r v v i i c c i i n n g g . . F F o o l l l l o o w w p p r r o o p p e e r r
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 . .
There are two different methods for removing the
tandem compressors, depending on the space in which
the chiller/heater is installed and the available space
overhead or behind the module:
R R e e m m o o v v e e T T h h r r o o u u g g h h t t h h e e R R o o o o f f P P a a n n e e l l : : Where there is a
minimum of 48 inches of overhead clearance, remove
the eight fasteners attaching the roof panel to the
module. Position a lifting device over the tandem
compressors.
R R e e m m o o v v e e T T h h r r o o u u g g h h t t h h e e S S i i d d e e C C T T o o p p P P a a n n e e l l : : Where there
is a minimum of 36 inches of rear clearance, remove
the fasteners attaching the upper Side C panel to the
module. Position supports on the middle level framing
sufficient to slide the tandem compressors out the rear.
1. Close the suction and discharge rotalock valves (if
so equipped). 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 refrigerant from the high and low sides
of the compressor using a suitable vacuum
recovery machine and clean recovery cylinder.
3. Detach the refrigeration lines from the compressor
suction and discharge stubs. Reconnect rotalock
valves.
4. Evacuate the compressor using the connections on
the suction and discharge stubs to 500 microns or
lower (250 to 500 micron range is ideal).
5. Disconnect the compressor power lines and all
associated power leads.
6. Observe the oil level in each compressor via the
sight glass and confirm the oil level is below the oil
line connector opening.
7. Disconnect and cap the threaded oil line on each
compressor.
8. Remove the four mounting bolts holding each
compressor to the middle frame.
9. Position a lifting device (top removal) or support
bracing (rear removal) and ensure there is sufficient
clearance as the compressors are moved.
10. Remove the compressors from the module by
lifting or sliding.
ARTC-SVX005B-EN
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
Install Tandem Compressor
Verify that power is disconnected from the chiller/
heater.
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 ! !
F F a a i i l l u u r r e e t t o o d d i i s s c c o o n n n n e e c c t t p p o o w w e e r r b b e e f f o o r r e e s s e e r r v v i i c c i i n n g g 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 d d e e a a t t h h o o r r s s e e r r i i o o u u s s i i n n j j u u r r y y . .
D D i i s s c c o o n n n n e e c c t t a a l l l l e e l l e e c c t t r r i i c c p p o o w w e e r r , , i i n n c c l l u u d d i i n n g g r r e e m m o o t t e e
d d i i s s c c o o n n n n e e c c t t s s b b e e f f o o r r e e s s e e r r v v i i c c i i n n g g . . F F o o l l l l o o w w p p r r o o p p e e r r
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. Position the tandem compressors into the chiller/
heater using the same method used for removal.
2. Position the compressors in position and attach to
the frame with eight mounting bolts, washers, and
nuts. Tighten nuts with 1/2-inch socket and wrench.
3. Install the rotalock nuts on the compressor suction
and discharge connections. The recommended
torque is 80 lbf for 2-inch and larger and 60 lbf for
rotalock nuts smaller than 2-inch. Tighten with a
narrow spud wrench.
4. Evacuate the compressors using the connections
on the suction and discharge stubs to 500 microns
or lower (250 to 500 micron range is ideal).
5. Attach compressor power lines, all associated
power leads, and safeties in the compressor
electrical box.
6. Re-connect the threaded oil line on each
compressor.
7. Observe the oil level in each compressor via the
sight glass and confirm the oil level is visible.
8. Open all rotalock valves (if so equipped) until fully
back-seated counterclockwise.
N N O O T T I I C C E E
V V a a l l v v e e D D a a m m a a g g e e ! !
A A p p p p l l y y i i n n g g e e x x c c e e s s s s i i v v e e f f o o r r c c e e w w h h e e n n f f u u l l l l y y o o p p e e n n i i n n g g a a n n
i i s s o o l l a a t t i i o o n n v v a a l l v v e e c c o o u u l l d d c c a a u u s s e e v v a a l l v v e e d d a a m m a a g g e e . . T T h h e e
v v a a l l v v e e c c o o u u l l d d b b i i n n d d i i n n t t h h e e f f u u l l l l y y o o p p e e n n p p o o s s i i t t i i o o n n a a n n d d
p p r r e e v v e e n n t t p p r r o o p p e e r r s s e e r r v v i i c c e e i i s s o o l l a a t t i i o o n n . .
D D o o n n o o t t a a p p p p l l y y e e x x c c e e s s s s i i v v e e f f o o r r c c e e . .
9. Restore power to the module containing the
compressor by turning the circuit breakers CB-1 and
CB-2 to the ON position.
10. Observe the newly installed tandem compressors
to verify that all connections have been seated and
tightened correctly.
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