Field Wiring; Wiring Connections - Weil-McLain Gold GV Manual

VI

Field wiring

Electrical installation must
comply with:
National Electrical Code and any other national, state,
provincial or local codes or regulations.
In Canada, CSA C22.1 Canadian Electrical Code Part 1,
and any local codes.
Wiring must be N.E.C. Class 1.
If original wiring as supplied with boiler must be
replaced, use only type 90 °C wire or equivalent.
Boiler must be electrically grounded as required by
National Electrical Code ANSI/NFPA 70-latest edition.

Wiring connections

Thermostat(s)
Install on inside wall away from influences of drafts,
hot or cold water pipes, lighting fixtures, television,
sunrays, or fireplaces.
Follow instructions with thermostat. If it has a heat
anticipator, set
match power requirements of equipment connected
to it (ignition control and gas valve, zone valve contacts,
etc.). Wiring diagram on boiler gives setting for
standard equipment (ignition control and gas valve).
Thermostat wires are labeled "
label before connecting as shown in Figure 18. Route
this wiring through the hole in the upper left side jacket.
For zoned systems, substitute the zone valve end
switches or circulator relay contacts for the thermostat
contact shown in Figure 18.
40
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GOLD GV Water Boiler — Series 4 GOLD GV W GOLD GV W ater Boiler — Series 4 ater Boiler — Series 4
in thermostat to
heat anticipator
" on boiler. Remove
T-T
When using three-wire zone valves,
take care to avoid miswiring
This can impose an additional 24
volts across the boiler control
circuitry. The boiler control module
will sense this problem and lockout.
It will flash the
lights to indicate the
CIRC
problem. See label on control
module for explanation of lockout
conditions. To verify before
connecting to boiler, disconnect
field thermostat wires at boiler.
Place a voltmeter across the leads.
Then watch the voltmeter as each
zone is activated (by activating
zone thermostat). There should
never be a voltage reading across the
two leads coming to the boiler. If
you see a voltage reading, one or
more zone valves is miswired.
Junction Box (furnished)
Locate the 2 x 4 junction box on the left side of the boiler
as shown on page 3 of this manual and in other
illustrations.
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.
Connect 120 VAC power wiring as shown in Figure
18.
Part number 550-141-856/0703
.
and
POWER TSTAT