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S S y y s s t t e e m m C C o o n n t t r r o o l l C C i i r r c c u u i i t t W W i i r r i i n n g g ( ( F F i i e e l l d d W W i i r r i i n n g g ) )
Table 20. Unit control panel wiring 120 Vac (continued)
Generic Refrigerant Monitor Input
Outdoor Air Temperature Sensor
Trace Comm Interface or LonTalk
1A14
Note: Comm 4 requires two
modules; one is mounted in each
panel.
BACnet or MODBUS
Tracer Comm 5 Interface (One
Comm 5 Module Left Panel Only)
Tracer SC Module
Right Hand Control Panel
Optional Low Voltage Circuits
% RLA Compressor 2 Output
(Circuit 2 Right Panel 1A15)
External Condenser Pressure
Output (Circuit 2 Right Panel 1A15)
Tracer Comm 4 Interface 1A14
Note: Comm 4 requires two
modules (one in each panel).
Note: All wiring to be in accordance with National Electrical Code (NEC) and any local codes.
(a)
If the Chilled Water Flow Proving Input is a factory-installed ifm efector flow-sensing device, the secondary field device (recommended with 38°F [3.3°C]
and lower leaving chilled water temperatures) for proof of flow connects from 1X1-5 to 1K26-4 (binary input; normally open, closure with flow). Remove
factory jumper when used.
(b)
If the Condenser Water Flow Proving Input is a factory-installed ifm efector flow-sensing device, the secondary (optional) field device for proof of flow
connects from 1X1-6 to 1K27-4 (binary input; normally open, closure with flow). Remove factory jumper when used.
(c)
Standard low-voltage circuits (less than 30 Vac) must be separated from 120 Vac or higher wiring.
Water Pump Interlock Circuits
and Flow Switch Input
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 . .
N N o o t t e e : : The circuits for the chilled water proof of flow
and the condenser water proof of flow do NOT
require external power. Refer to the wiring
diagrams that shipped with the chiller.
Chilled Water Pump
1. Wire the evaporator water pump contactor (5K1) to
a separate 120 volt single-phase power supply with
14 AWG, 600V copper wire.
2. Connect circuit to 1A5-J2-6.
3. Use 1A5-J2-4 120 Vac output to allow the control
panel to control the evaporator water pump, or wire
the 5K1 contactor to operate remotely and
independently of the control panel (left panel only).
64
1A17-J2-5 to 6
Inter-processor Communication
(IPC) Bus Connection and Sensor
1A14-J2-1(+) to 2(-)
1A14-J2-3(+) to 4(-)
Left Panel
1A22, 5(+) to 6(-)
1A14-J2-1(+) to 2(-)
1A14-J2-3(+) to 4(-)
Left Panel
1A10
1A15-J2-1 to 3 Right Panel
1A15-J2-4 to 6 Right Panel
1A14-J2-1(+) to 2(-)
1A14-J2-3(+) to 4(-)
Right Panel
Analog Input
Communication and Sensor
Communication to Tracer
or LonTalk
Communication to BACnet or
MODBUS
Communication to Tracer
Communication to Tracer SC
Module
Analog Output
Analog Output
Communication to Tracer
Chilled Water Proof of Flow
When this circuit is installed properly and the
evaporator pump is running and providing the required
minimum flow, this circuit will prove the evaporator
water flow for the chiller controls. Proof of evaporator
water flow is required before the start sequence will be
allowed to proceed and a loss of evaporator water flow
during chiller operation will result in a chiller shut-
down.
Refer to as-built schematics on the inside of the control
panel for field wiring. This is a dry binary input;
normally-open, closure for flow. Apply no external
power.
1. With factory-installed ifm efector® flow-sensing
devices, a field-provided secondary flow-sensing
device is recommended with applications having
38°F (3.3°C) and below leaving evaporator water
temperatures. When a secondary flow-sensing
device is used, remove the factory jumper and
install its contacts between 1X1-5 to 1K26-4; this
places the secondary flow sensing device in series
with the ifm efector® flow-sensing device.
2. For field-provided primary proof of flow devices,
connect the primary proof of flow device between
terminals 1X1-5 to 1A6-J3-2 (left panel only). A
secondary field device is recommended with
applications having 38°F (3.3°C) and below leaving
evaporator water temperatures, and must be field-
wired in series with the primary proof of flow
device.
2–10 Vdc, or 4–20 mA
(As Ordered; See Sales Order)
(As Ordered; See Sales Order)
2–10 Vdc
2–10 Vdc
CDHF-SVX01N-EN
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