HTP ELP-199 - Manual (Page 44)

44
LP-294 REV. 2.20.14
DO NOT adjust or attempt to measure gas valve outlet pressure. The gas valve is factory-set for the correct outlet pressure and
requires no field adjustment. Attempts by the installer to adjust or measure the gas valve outlet pressure could result in damage to the
valve and cause substantial property damage, severe personal injury, or death.
Ensure that the high gas pressure regulator is as least 6 – 10 feet upstream of the boiler. Failure to do so could result in substantial
property damage, severe personal injury, or death.
Strain on the gas valve and fittings may result in vibration, premature component failure and gas leakage, and result in fire, explosion,
property damage, severe personal injury, or death.
Adjustments to the throttle screw or offset may only be made by a qualified gas technician using a calibrated combustion analyzer
capable of measuring CO
2
and CO. Failure to follow this instruction could result in fire, explosion, property damage, severe personal
injury, or death.
PART 7 – FIELD WIRING
ELECTRICAL SHOCK HAZARD - For your safety, 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.
Wiring must be N.E.C. Class 1. If original wiring supplied with the boiler must be replaced, use only AWM/TEW 105
o
C wire or
equivalent. Boiler must be electrically grounded as required by National Electrical Code ANSI/NFPA 70 – Latest Edition. Follow all local
codes.
To ease future service and maintenance, label all wires. Wiring errors can cause improper and dangerous operation, and result in
substantial property damage, severe personal injury, or death.
A. 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 TERMINATIONS
All connections made to the boiler in the field are done inside the electrical junction box located on the left side of the boiler. Multiple
knockout locations are available to route field wires into and out of the electrical junction box.
C. FIELD WIRING
The control used in the boiler is capable of directly controlling 3 pumps – General, CH, and DHW. Total pump output current available
for the pumps cannot exceed 3 amps at 120 volts. If a pump requires more than this amount of power, an external contactor or motor
starter is needed. The system pump output is capable of switching 0.5 amps at 120 volts, in addition to the boiler and DHW pumps
described above.
The electrical junction box 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
“Straight Through” CAT3 or CAT5 patch cables.
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.