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Table 73. Air-cooled condenser—refrigerant coil fin data (continued)
Coil Type
Tons
Evaporator
120
Hi-Cap Evap
Condenser
Evaporator
130
Hi-Cap Evap
Condenser
Evaporator
150
Condenser
Fan Belt Adjustment
The supply fan belts and optional exhaust fan belts
must be inspected periodically to assure proper unit
operation.
Replacement is necessary if the belts appear frayed or
worn. Units with dual belts require a matched set of
belts to ensure equal belt length. When removing or
installing new belts, do not stretch them over the
sheaves; instead, loosen the adjustable motor-
mounting base.
Once the new belts are installed, adjust the belt tension
using a Browning or Gates tension gauge (or
equivalent) illustrated in
Figure 145. Typical belt tension gauge
Deflection = Belt Span (in.)
64
Deflection = Belt Span (mm)
152
RT-SVX24Q-EN
Coil Fin
Tube Dia.
Config.
Internally
1/2
Finned
Internally
1/2
Finned
Enhanced
18 mm
Internally
1/2
Finned
Internally
1/2
Finned
Enhanced
18 mm
Internally
1/2
Finned
Smooth
18 mm
Figure 145, p.
195.
Force Scale
Small
O-Ring
Span Scale
Large
O-Ring
Fins per foot
Coil Rows
3
168
6
168
2
276
4
168
6
168
2
276
6
168
2
276
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 w w / / C C a a p p a a c c i i t t o o r r s s ! !
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 a a n n d d d d i i s s c c h h a a r r g g e e
c c a a p p a a c c i i t t o o r r 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 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 a a n n d d d d i i s s c c h h a a r r g g e e a a l l l l m m o o t t o o r r s s t t a a r r t t / / r r u u n n
c c a a p p a a c c i i t t o o r r 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 . . F F o o r r v v a a r r i i a a b b l l e e
f f r r e e q q u u e e n n c c y y d d r r i i v v e e s s o o r r o o t t h h e e r r e e n n e e r r g g y y s s t t o o r r i i n n g g
c c o o m m p p o o n n e e n n t t s s p p r r o o v v i i d d e e d d b b y y T T r r a a n n e e o o r r o o t t h h e e r r s s , , r r e e f f e e r r t t o o
t t h h e e a a p p p p r r o o p p r r i i a a t t e e m m a a n n u u f f a a c c t t u u r r e e r r ' ' s s l l i i t t e e r r a a t t u u r r e e f f o o r r
a a l l l l o o w w a a b b l l e e w w a a i i t t i i n n g g p p e e r r i i o o d d s s f f o o r r d d i i s s c c h h a a r r g g e e o o f f
c c a a p p a a c c i i t t o o r r s s . . V V e e r r i i f f y y w w i i t t h h a a C C A A T T I I I I I I o o r r I I V V v v o o l l t t m m e e t t e e r r
r r a a t t e e d d p p e e r r N N F F P P A A 7 7 0 0 E E t t h h a a t t a a l l l l c c a a p p a a c c i i t t o o r r s s h h a a v v e e
d d i i s s c c h h a a r r g g e e d d . .
F F o o r r a a d d d d i i t t i i o o n n a a l l i i n n f f o o r r m m a a t t i i o o n n r r e e g g a a r r d d i i n n g g t t h h e e s s a a f f e e
d d i i s s c c h h a a r r g g e e o o f f c c a a p p a a c c i i t t o o r r s s , , s s e e e e P P R R O O D D - - S S V V B B 0 0 6 6 * * - - E E N N . .
1. To determine the appropriate belt deflection:
a. Measure the center-to-center distance, in
inches, between the fan sheave and the motor
sheave.
b. Divide the distance measured in Step 1a by 64;
the resulting value represents the amount of
belt deflection for the proper belt tension.
2. Set the large O-ring on the belt tension gauge at the
deflection value determined in Step 1b.
3. Set the small O-ring at zero on the force scale of the
gauge.
4. Place the large end of the gauge on the belt at the
center of the belt span. Depress the gauge plunger
until the large O-ring is even with the of the second
belt or even with a straightedge placed across the
sheaves.
S S e e r r v v i i c c e e a a n n d d M M a a i i n n t t e e n n a a n n c c e e
Coil Face Area
Tube Type
(sq. ft.)
Internally Finned
106.25
Internally Finned
106.25
161
Microchannel
Internally Finned
106.25
Internally Finned
106.25
161
Microchannel
Internally Finned
106.25
161
Microchannel
W W A A R R N N I I N N G G
195
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