W7100G); Chilled Water Sensor Checkout; (Honeywell Sensor) - Trane RAUJ-C20 Installation, Operation And Maintenance Manual

P P r r e e - - S S t t a a r r t t
W W A A R R N N I I N N G G
L L i i v v e e E E l l e e c c t t r r i i c c a a l l 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 f f o o l l l l o o w w a a l l l l e e l l e e c c t t r r i i c c a a l l s s a a f f e e t t y y p p r r e e c c a a u u t t i i o o n n s s
w w h h e e n n e e x x p p o o s s e e d d t t o o l l i i v v e e e e l l e e c c t t r r i i c c a a l l c c o o m m p p o o n n e e n n t t 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 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 . .
W W h h e e n n i i t t i i s s n n e e c c e e s s s s a a r r y y t t o o w w o o r r k k w w i i t t h h l l i i v v e e e e l l e e c c t t r r i i c c a a l l
c c o o m m p p o o n n e e n n t t s s , , h h a a v v e e a a q q u u a a l l i i f f i i e e d d l l i i c c e e n n s s e e d d e e l l e e c c t t r r i i c c i i a a n n
o o r r o o t t h h e e r r i i n n d d i i v v i i d d u u a a l l w w h h o o h h a a s s b b e e e e n n p p r r o o p p e e r r l l y y t t r r a a i i n n e e d d
i i n n h h a a n n d d l l i i n n g g l l i i v v e e e e l l e e c c t t r r i i c c a a l l c c o o m m p p o o n n e e n n t t s s p p e e r r f f o o r r m m
t t h h e e s s e e t t a a s s k k s s . .
11. At the Chilled Water Controller, use a digital
voltmeter to verify there is 24 volts AC across
terminals TR & TR.
12. After approximately 15 seconds, the LEDs on the
W7100G should begin to illuminate as the cooling
outputs stage "On".
13. Set the "Setpoint F" dial at 60ºF; within 15 seconds,
the LEDs should turn "Off" as the cooling outputs
stage "Off".
14. Remove the 1780 ohm resistor from Terminals 6 &
7 and reinstall the wire jumper removed in step 6.
15. Set the "Setpoint F" dial at 50ºF; within 15 seconds,
the LEDs should turn "On" as the cooling outputs
stage "On".
16. Turn the control circuit switch 1S2, in the unit
control panel, to the "OFF" position.
17. Remove the 3,400 ohm resistor from Terminals T &
T1 and reconnect the chilled water temperature
sensor leads to Terminals T & T1.
18. Remove the "Test Plug" from the W7100G test
socket and reinstall the red dust cover.
19. Plug the reset relay(s) 1K11 and 1k12 (if applicable)
back into their receptacle.
20. Turn the control switch 1S2 to the "On" position to
restore power to the control system.
100
Figure 71. W7100G chilled water controller
GND
24 VAC
TR
TR
W
SETPOINT °F
R
ECONO
B
Y
CHANGE
10
OVER
9
# STAGES RESET °F
8
7
RESET
6
T
SENSOR
T1
CONTROL
REMOTE
P
BAND °F
SETPOINT
P1
5
4
SATELLITE
3
2
1
Test Plug Socket
(Remove red dust cover)

Chilled Water Sensor Checkout

(Honeywell Sensor)

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. Verify that the main power disconnect switch and
the control circuit switch 1S2, in the unit control
panel, is "OFF".
2. At the temperature controller, disconnect the wire
connected to terminal T1. Use a digital ohmmeter
to measure the resistance across terminal T and the
wire removed from terminal T1.
3. Use the conversion chart in Figure 37 to convert the
measured resistance to an equivalent temperature.
4. Measure the actual temperature at the sensor
location. If the measured resistance in step 2 is not
within ± 10.0 ohms of the actual temperature, the
sensor is out of range; replace it.
COOL
6
B
C
A
COOL
5
B
C
A
COOL
4
B
C
A
COOL
3
B
C
A
COOL
2
B
C
A
COOL
1
B
C
A
SS-SVX11K-EN