Raypak B-R259 Installation & Operating Instructions Manual

Contents

26PRVFIELD-SUPPLIEDNOTE: To avoid water damage or scalding due tovalve operation, drain pipe must be connected to valveoutlet and run to a safe place of discharge. Drain pipemust be the same size as the valve discharge connec-tion throughout its entire length and must pitch down-ward from the valve. No shut-off valve shall beinstalled between the relief valve and the drain line.Valve lever should be tripped at least once a year toensure that waterways are clear.PRESSURE RELIEF VALVE INSTALLATIONTo conform to local building codes, it may be neces-sary to install a 3/4" pressure relief valve, having acapacity equal to the BTUH output of the model. Themaximum acceptable pressure relief valve setting is125 psi.ELECTRICAL WIRINGNOTE: If it is necessary to replace any of the originalwiring, use 105°C wire or its equivalent, and/or 150°Cwire or its equivalent, like the original wiring.WARNING: Heaters are factory-wired for240 VAC power supply. DO NOT attempt to oper-ate at or below 208 VAC.CAUTION: Heater must be electrically grounded andbonded. Bonding lug is provided loose with theheater. Install bonding lug on lower right or left sideof jacket as necessary for bonding the heater.Mounting hole is provided on the jacket.The Electronic Intermittent Ignition Device automati-cally lights the main burner upon a call for heat. Theheater is supplied with a dual-voltage transformer for120 VAC or 240 VAC input power hookup.NOTE: Failure to ground the heater electricallycould affect the heater’s electronics.NOTE: See page 40 for further instructions if usinga time clock/fireman’s switch.Wiring locationsCONTROL BOX(FACTORY-MOUNTEDLOCATION)FIELD WIRING BOXRECOMMENDEDPOWER SUPPLYSIDEOPTIONALPOWER SUPPLY SIDE(ROUTING TO WIRINGBOX REQUIRED)