Lochinvar Sunc Condensing Boiler 1.3 - Manual (Page 38)

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 18 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
BK
SERVICE SWITCH
MODULE I
HOT WATER
GENERATOR
MODULE 2
HOT WATER
GENERATOR
SYSTEM PUMP
1.5HP/120V, 3HP/240V
MODULE I
BOILER PUMP
1.5HP/120V, 3HP/240V
MODULE 2
BOILER PUMP
1.5HP/120V, 3HP/240V
PUMP CONTROL
W
W
W
W
W
G
G
G
G
G
BK
BK
BK
L
L
LI G L2/W
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