HTP PHE199-119 - Manual (Page 43)

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LP-314 REV. 3.24.14
PART 7 - FIELD WIRING
A. FIELD WIRING COMPLIANCE REQUIREMENTS
ELECTRICAL SHOCK HAZARD – For your safety, to avoid possible electrical shock hazard, turn off electrical power supply at service
entrance panel before making any electrical connections. Failure to do so can result in severe personal injury or death.
NOTE: Wiring must be N.E.C. Class 1. If original wiring as supplied with boiler must be replaced, use only TEW 105
o
C wire or
equivalent. Boiler must be electrically grounded as required by National Electrical Code ANSI/NFPA 70 – latest edition.
INSTALLATION MUST COMPLY WITH:
1. National Electrical Code and any other national, state, provincial or local codes or regulations.
2. In Canada, CSA C22.1 Canadian Electrical Code Part 1, and any local codes.
B. FIELD WIRING
All the wiring connections made to the appliance in the field are done on the field connection board located on the right side of the
cabinet. The cabinet has multiple knockouts available to route field wiring into and out of the field connection board. The control
provides a pump output thermostat and outdoor sensor inputs to operate the central heating system.
C. LINE VOLTAGE WIRING
1. Connect the normal incoming power to the terminals marked as shown in Figure 25. A line voltage fused disconnect switch may be
required to be externally mounted and connected according to local codes and standards.
2. Connect the central heating pump as shown in the terminals marked CH/DHW PUMP (see Figure 25). 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 than the 120 volts
supplied, an external motor starter will be required.
3. Please note that the solar pump connectors on the field connection board are not functional at this time.
D. LOW VOLTAGE WIRING
1. Make all low voltage connections to the terminal strip located on the field connection board (shown in Figure 24) as outlined below.
2. The room thermostat should be connected to the terminals marked T STAT (shown in Figure 24). Alternately, any dry contact
closure across these terminals will cause the unit to operate the hydronic heating module. NOTE: Caution must be used to ensure
neither of the terminals becomes connected to ground. Mount the thermostat on an inside wall as central as possible to the area being
heated, away from drafts or heat producing devices such as a television, which could influence the ability of the thermostat to measure
room temperature accurately. NOTE: If the thermostat is equipped with a directly connected anticipator, the anticipator should be set at
.1 amps. If the thermostat is connected to other devices, the anticipator should be set to match the power requirements of those
connected devices. Refer to the instruction manuals of the connected devices for further information.
3. The outdoor sensor must be connected for the unit to operate at optimum efficiency. Use a minimum 22 AWG wire for runs of 100
feet or less and minimum 18 AWG wire for runs up to 150 feet. Instructions are included with the outdoor sensor to correctly mount the
sensor on the exterior surface of the building. It is preferable to mount the sensor on the north side in an area that will not be affected
by direct sunlight but will be exposed to varying weather conditions. Connect the ou
tdoor sensor to terminals marked “Outdoor” in
Figure 24.
E. FIELD CONNECTION BOARD
Label all wires prior to disconnecting them when servicing the appliance. Wiring errors can cause improper and dangerous operation.
Failure to follow these instructions may result in property damage or personal injury.
To avoid electrical shock, turn off all power to the appliance prior to opening an electrical box within the unit. Ensure the power remains
off while any wiring connections are being made. Failure to follow these instructions could result in component or product failure,
serious injury, or death. Such product failure IS NOT covered by warranty.