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Installation & Operation Manual
7 Field wiring
ELECTRICAL SHOCK HAZARD – For
your safety, turn off electrical power
supply before making any electrical
connections to avoid possible electric
shock hazard. Failure to do so can cause
severe personal injury or death.
Wiring must be N.E.C. Class 1.
If original wiring as supplied with boiler
must be replaced, use only type 105°C wire
or equivalent.
Boiler must be electrically grounded as
required by National Electrical Code
ANSI/NFPA 70 – latest edition.
Installation must comply with:
1. National Electrical Code and any other national, state,
provincial, or local codes, or regulations.
2. In Canada, CSA C22.1 Canadian Electrical Code Part 1, and
any local codes.
Line voltage connections
1. Connect 120 VAC power wiring to the line voltage terminal
strip in the junction box, as shown in FIG. 7-1.
2. Provide and install a fused disconnect or service switch
(15 amp recommended) as required by the code (see
FIG. 7-1).
3. When connecting hot water generator pumps connect the
wiring to the line voltage terminal strip as shown in
FIG. 7-1. Maximum current is 1.8 amps, install a field
supplied contactor.
4. To activate a system pump, wire as shown in FIG. 7-1. Dry
contacts are sized for 1.5 hp/120V, 3 hp/240V or 30 amps.
5. To activate a louver, connect to the dry contacts provided.
Contacts are rated for 5 amps, 120V.
Figure 7-1 Line Voltage Field Wiring Connections
Label all wires prior to disconnection
when servicing controls. Wiring errors
can cause improper and dangerous
operation.
ƽ WARNING
NOTICE
ƽ CAUTION
120V SUPPLY
NEUTRAL W
GROUND G
LINE
SERVICE SWITCH
BK
HEAT EXCHANGER 1
HOT WATER
GENERATOR
HEAT EXCHANGER 2
HOT WATER
GENERATOR
SYSTEM PUMP
HEAT EXCHANGER 1
BOILER PUMP
HEAT EXCHANGER 2
BOILER PUMP
W
G
L
W
G
L
BK
G
W
BK
G
W
BK
G
W
BK
L2/W G
L1
PUMP CONTACTOR
HEX 1
HEX 2