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Electrical Power Connections
Installations must follow these codes:
•
National Electrical Code and any other national,
state, provincial or local codes or regulations hav-
ing jurisdiction.
•
Safety wiring must be NEC Class 1.
•
Heater must be electrically grounded as required
by the NEC.
•
In Canada, CSA C22. 1 C.E.C. Part 1.
The heater is wired for 120 VAC, <12 amps. The volt-
age is indicated on the tie-in leads. Consult the wir-
ing diagram shipped with the heater in the instruction
packet. The remote tank control stat, thermostat, or
electronic heater control (as applicable) may be con-
nected to the stage selector terminal (See wiring dia-
gram). 24 VAC is supplied to this connection through
the heater transformer. DO NOT attach any voltage
to the stage selector terminals. Before starting the
heater check to ensure proper voltage to the heater
and pump.
Install a separate disconnect means for each load. Use
appropriately sized wire as defined by NEC, CSA and/
or local code. All primary wiring should be 125% of
minimum rating.
If any of the original wire as supplied with the heater
must be replaced, it must be replaced with 105°C wire
or its equivalent.
Field-Connected Controllers
It is strongly recommended that all individually-pow-
ered control modules and the heater should be sup-
plied from the same power source.
NOTE: Field-supplied isolation relays should be
installed when field-connected controllers are
mounted more than 50 equivalent feet (18 Ga)
from heater.
Check the Power Source
AWARNING: Using a multi-meter, check the
following voltages at the terminal block inside
the unit. Make sure proper polarity is followed
and house ground is proven. (See Fig. 17.)
BLACK
WHITE
A B C
Fig. 17: Wiring Connections
Check the power source:
AC = 108 VAC Minimum, 132 VAC MAX
AB = 108 VAC Minimum, 132 VAC MAX
BC = <1 VAC Maximum
W. 18: Multi-meter
If the heater does not have a factory-wired stage con-
troller, it is factory-wired in an on-off configuration with
other stage terminals jumpered.
To field-connect a stage controller, remove factory-in-
stalled jumpers and wire stage controller as shown in
Fig. 20–23.
Making the Electrical Connections
Refer to Fig. 16–22.
1. Verify that circuit breaker is properly sized by re-
ferring to heater rating plate. A dedicated circuit
breaker should be provided.
2. Turn off all power to the heater. Verify that power
has been turned off by testing with a multi-meter
prior to working with any electrical connections or
components.
CIRCUIT
BREAKER
GREEN
GROUND
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