24
Field Connected Devices
Field Wiring Connection
Field-Connected Devices
It is strongly recommended that all individually-powered
control modules and the heater should be supplied from
the same power source.
Install heater controls, thermostats, or building
management systems in accordance with the applicable
manufacturers’ instructions.
A
A
DANGER: SHOCK HAZARD
1
2
3
24VAC
CWP
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
USE COPPER CONDUCTORS ONLY
CWP
0 - 10 VDC
EMS
INPUT
JUMPER WHEN
NOT USED
ALARM
DRY
CONTACTS
120V
EXTERNAL
SAFETY
VALVE
FAN/DAMPER
DRY
CONTACTS
EXTERNAL
INTERLOCK
SYSTEM
SENSOR
OUTDOOR
SENSOR
INDIRECT
DHW
SENSOR
TEMP TO
INDIRECT
SENSOR
JUMPER 11 & 12
WHEN NOT USED
ENABLE/
DISABLE
INDIRECT
DHW OVERIDE
FIELD WIRING
TERMINAL BLOCKS
FACTORY WIRING
NOTE: Use only stranded copper conductors.
Figure 26. Low-Voltage Field Wiring
NOTE:
Minimum 18 AWG, 105°C, stranded wire must
be used for all low voltage (less than 30 volts) external
connections to the heater. Solid conductors should not
be used because they can cause excessive tension on
contact points. Install conduit as appropriate. All high
voltage wires must be the same size (105°C, stranded
wire) as the ones on the unit or larger.
A
A
CAUTION:
Label all wires prior to disconnection
when servicing controls. Wiring errors can cause
improper and dangerous operation. Verify proper
operation after servicing.
Make sure electrical power to the heater is disconnected
to avoid potential serious injury or damage to components.
Figure 27.
Low-Voltage Wiring/Transformer Box
FIELD WIRING TERMINAL
BLOCKS
FIELD LOW VOLTAGE
CONDUIT LOCATIONS
F10615
FIELD WIRING
KNOCKOUT
Содержание Xfiire 300B
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