Electrical Wiring; Normal Gas Supply And Piping - Camus Hydronics MFH060 Installation, Operation And Service Manual

4.

ELECTRICAL WIRING

All electrical wiring to the boiler must be electrically bonded to ground 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 or the Canadian Electrical Code Part I, CSA C22.1, Electrical Code.
Provide disconnecting means of sufficient rating within sight of the boiler. These heaters require an 115V,
60Hz supply. Depending on the pump used, a 15-amp breaker is usually sufficient.
Electrical connections must be made so that the circulator will operate before the gas valve can open. At
no time may the control system allow the burner to fire without water flowing in the system.
Use minimum 18-gauge conductor for 24-volt field wiring to boiler. Splicing of wires is not recommended.
Use sealed tight conduit suitable for outdoor use for outdoor installations.
Use terminal strip provided inside control panel for low water cut-off and remote controller
Refer to wiring diagram provided with boiler.
5.

NORMAL GAS SUPPLY AND PIPING

This boiler is intended to operate at inlet gas pressures not exceeding 1/4 PSI (7"W.C.) when firing with
natural gas. If higher pressures are present, consult the gas company for correction.
When pressure testing the gas supply piping at pressures above ½ PSI, the boiler and its individual gas
shut-off valve must be disconnected from the supply piping.
Provide a trap (drip leg) as close to the heater as possible.
Install a ground joint union and manual shut-off valve in the gas line near the heater to allow easy removal
of the gas control assembly.
Provide gas pressures at inlet to appliance in accordance with the limits in the table below:
Minimum Running (inches W.C.)
Maximum Lockup (inches W.C.)
PROPANE NATURAL GAS
10
11
5
4
14