32
Electrical Connections
Refer t o wiring diagrams on pages 46
and 47. All wiring must be properly
grounded! Before attempting to wire
unit, disconnect power supply at main
service panel first. For pumps
exceeding 4 A, refer to F ig. 16 and
wiring diagrams on pages 46 and 47.
In the United States all electrical wiring
must be in accordance with the
National Electrical Code ANSI/NFPA 70
(latest edition).
In Canada all e lectrical connections
must be in accordance with Canadian
Electrical Code C22.1 Part 1 (latest
edition.)
If an external electrical source is
utilized, t he boiler, when installed, must
be electrically grounded in accordance
with the requirements of the authority
having jurisdiction or, in the absence of
such requirements, with the National
Electrical Code, ANSI/NFPA 70.
N
L
T
T
G
N
L
120V24V
L
N
Jumper
Separate breaker
Transformer/relay
(field supplied)
Terminal strip
Thermostat
connections
120V pump
output
120V power
input
120V pump
over 4 Amp.
WR 8A02A
Using transformer/relay to s witch pumps over 4 Amp.
WR 8A02A contact can switch 120VAC, 12 Amp.
Fig. 16
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