Field Wiring; Wiring Connections - Weil-McLain GOLD CGa Installation And Maintenance Manual

Boiler Manual
5

Field wiring

For your safety,
service entrance panel before making any electrical
connections
Failure to do so can cause severe personal injury or
death.
Wiring must be N.E.C. Class 1.
If rollout thermal fuse element wire as supplied with
boiler must be replaced, type
must be used. If other original wiring as supplied with
boiler must be replaced, use only type
equivalent.
Boiler must be
National Electrical Code ANSI/NFPA 70-latest edition.
Electrical 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.

Wiring connections

Boiler is shipped with controls completely wired, except
spill switch and vent damper. Refer to wiring diagrams
shown on page 34 for standing pilot ignition boiler or
page 38 for spark-ignited pilot boiler.
Figure 20
Field wiring connections —
service switch and
thermostat (or end switch)
provided by installer
Part Number 550-110-593/1099
turn off electrical power supply at
to avoid possible electric shock hazard.
wire or equivalent
200 °C
105 °C
electrically grounded as required by
120 VAC
Hot
Service
switch
(not provided)
Black
Junction box,
boiler left side
Thermostat
1. Connect thermostat as shown on wiring diagram
on boiler.
2. Install on inside wall away from influences of drafts,
hot or cold water pipes, lighting fixtures, television,
sunrays or fireplaces.
3. If thermostat has a heat anticipator, set heat
anticipator in thermostat to match power
requirements of equipment connected to it. If
connected directly to boiler, set for 0.1 amps plus
gas valve current. See information on the wiring
wire or
diagram shown in
devices, refer to manufacturer's specifications.
Wiring diagram on boiler gives setting for control
module and gas valve. Also see instructions with
thermostat.
Junction box (furnished)
1. Connect 120 VAC power wiring (
2. Fused disconnect or service switch (15 amp.
recommended) may be mounted on this box. For
those installations with local codes which prohibit
installation of fused disconnect or service switch on
boiler, install a 2 x 4 cover plate on the boiler
junction box and mount the service switch remotely
as required by the code.
Wiring multiple zones
Refer to zone valve manufacturer's literature for wiring
and application. A separate transformer is required to
power zone valves. Zoning with circulators requires a
relay for each circulator.
Neutral Ground
Ground screw
White Green Black
T h e r m o s t a t
leads, through
jacket left side
59323
, page 39. For other
Figure 25b
Figure 20
Thermostat
or end switch
(not provided)
Wire nuts
Black
).
Service
switch
(not provided)
Thermostat
or end switch
(not provided)
27