Line Voltage Wiring For Standard Heater; Thermostat - Pioneer PHR100-55 Instruction Manual

Figure 18 –Control Detail LP-325-P1
3. If using DHW, connect the domestic hot water pump as shown to the terminals marked 4 (HOT), 5
(NEUT), 6 (GND). The connections shown are suitable for a maximum continuous pump draw of 3 amps
at 120 volts.
4. If a pump requires more current or voltage other than 120 volts, an external motor starter or contactor
will be required.
D. THERMOSTAT
1. Connect the room thermostat to the terminals marked 14 and 15 on the field connection board. Any dry
contact closure across these terminals will cause the heater to run. Caution should be used to ensure
neither of the terminals connects to the ground.
The heater is capable of directly controlling 2
pumps when in standard mode and 3 pumps
when configured as a cascade master heater.
When configured as a standard unit, each
pump output can provide a maximum of 3
amps at 120 volts. If pumps require more than
this amount of power, an external contactor or
motor starter is needed.
If the heater is configured as a cascade
master, the system pump output is a dry
contact output capable of switching 5 amps at
120 volts in addition to the heater pump and
DHW pump outputs sourcing 3 amps each.
The field connection board has separate,
clearly marked terminal strips for line voltage
and low voltage wiring. Special jacks are
provided for trouble-free cascade system
wiring using standard CAT3 or CAT5 patch
cables.
C. LINE VOLTAGE WIRING FOR
STANDARD HEATER
1. Connect the incoming power wiring to the
line voltage terminal strip in the field
connection board at terminals 120V, Neutral,
Ground. A line voltage fused disconnect switch
may be required to be externally mounted and
connected according to local codes that may
apply.
2. Connect the central heating pump to the
terminals marked 1 (HOT), 2 (NEUT), 3 (GND)
in Figure 18. The connections shown are
suitable for a maximum continuous pump draw
of 3 amps at 120 volts. If the pump requires
more current or voltage other than 120 volts,
an external motor starter or contactor will be
required.
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