Verifying Proper Fan Rotation - Trane Voyager Commercial Installation, Operation And Maintenance Manual

S S t t a a r r t t u u p p
Table 46. Test mode states for SZ VAV units with modulating hot gas reheat and modulating heat
TEST
STEP MODE FAN
1 FAN ON ON
ECONO-
2 ON
MIZER
3 COOL 1 ON
4 COOL 2 ON
5 COOL 3 ON
6 REHEAT ON
7 HEAT 1 ON
8 HEAT 2 ON
9 RESET
Notes:2 & 3 stage standard efficiency units (excluding 40-50T Std Efficiency CV):
1. For Traditional VAV units, the VFD Command when "In-Control" will be controlled based on Supply Air Pressure Requirements. For SZ VAV
units, the VFD Command will be at discrete points during Test Mode.
2. For 27.5-35T units, both compressors will be energized during the Cool 2 Step. For 40-50T units, only Compressor 2 will be energized during
the Cool 2 Step.
3. The Reheat Pumpout relay will be energized any time the Reheat circuit is energized in active Cooling Mode.
4. For units with Statitrac installed, the Exhaust Damper will track the Economizer position during Service Test Mode and the Exhaust Fan will be
energized once the Economizer rises above the Exhaust Enable Setpoint.
Notes:5 stage high efficiency units (including 40-50T Std Efficiency CV):
1. Compressor 1 is the smaller compressor on the circuit.
2. Condenser fans are controlled as defined for normal operation.
3. Exhaust fan operates as defined for normal operation based on economizer position.
4. When Compressor 1 is energized with either C1, C2, or with both for 30 minutes continuously, C3 will be required to de-energize for 30
seconds.

Verifying Proper Fan Rotation

W W A A R R N N I I N N G G
R R o o t t a a t t 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 ! !
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 r r o o t t a a t t 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 c c u u t t t t i i n n g g a a n n d d s s l l a a s s h h i i n n g g
t t e e c c h h n n i i c c i i a a n n w w h h i i c c h h 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 . .
Using , p. 68 to Table 46, p. 74
momentarily jump across the test terminals to start the
Minimum Ventilation Test.
The Exhaust Fan will start anytime the economizer
damper position is equal to or greater than the exhaust
fan setpoint.
74
VFD COMP
COMMAND ECON
1
45% (0
MIN OFF
VDC)
45% (0
OPEN OFF
VDC)
80% (6.67
MIN ON
VDC)
IN-
MIN ON
CONTROL
IN-
MIN ON
CONTROL
73% (5.24
MIN ON
VDC)
100% (10
MIN OFF
VDC)
100% (10
MIN OFF
VDC)
as a reference,
COMP COMP HEAT
3 OUTPUT
2
OFF OFF 0%
OFF OFF 0%
OFF OFF 0%
ON OFF 0%
ON ON 0%
ON ON 0%
OFF OFF 50%
OFF OFF 100%
The economizer will drive to the minimum position
setpoint, exhaust fans may start at random, and the
supply fan will start.
Once the supply fan has started, check for proper
rotation. The direction of rotation is indicated by an
arrow on the fan housing.
If the fan is rotating backwards, open the main power
disconnect switch upstream of the unit terminal block
or the unit factory mounted disconnect switch.
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 . .
RE-
PUMP- COOL HEAT
OUT
VALVE VALVE
OFF 100%
OFF 100%
IN-
CON- 100%
TROL
IN-
CON- 100%
TROL
IN-
CON- 100%
TROL
IN-
CON- 50% 50%
TROL
OFF 100%
OFF 100%
W W A A R R N N I I N N G G
RT-SVX34R-EN
0%
0%
0%
0%
0%
0%
0%