Field Wiring - Weil-McLain CGa 2 Series Manual

CGa Series 2 Gas-Fired Water Boiler — Boiler Manual
5

Field wiring

For your safety,
to avoid possible electric shock hazard. Failure
to do so can cause severe personal injury or death.
If rollout thermal fuse element wire as supplied with boiler
must be replaced, type
used. If other original wiring as supplied with boiler must
be replaced, use only type
Installation must comply with:
provincial or local codes or regulations.
and any local codes.
Wiring connections
on page 36 for spark-ignited pilot boiler.
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 equip-
ment connected to it. If connected directly to boiler, set
for 0.1 amps plus gas valve current. See information on
Field wiring connec-
tions —
service switch, DHW
(if used) and
thermostat
(or end switch) pro-
vided by installer
Part Number 550-142-900/1016
-
-
wire or equivalent must be
wire or equivalent.
as required by
the wiring diagram shown in
tions. Wiring diagram on boiler gives setting for
control module and gas valve. Also see instructions
with thermostat.
DHW
1. Connect DHW aquastat as shown in wiring below.
Junction box (furnished)
2. Fused disconnect or service switch (15 amp. recom-
mended) may be mounted on this box. For those
installations with local codes which prohibit instal-
lation 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
and application. A separate transformer is required to
relay for each circulator.
. When using 3-wire zone
valves, install an isolation relay. Connect
the zone valve end switch wires to the
isolation relay coil. Connect the isolation
relay contact across the boiler T-T
terminals. Failure to comply can result in
damage to boiler components or cause
unreliable operation, resulting in severe
property damage.
, page 37.
-
).
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