Raypak HI DELTA 302B Installation & Operating Instructions Manual

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Raypak HI DELTA 302B Installation & Operating Instructions Manual Manual pdf 21 page image

at test pressures equal to or less than 1/2 psi (3.45kPa). Relieve test pressure in the gas supply line priorto reconnecting the heater and its manual shut-offvalve to the gas supply line. FAILURE TO FOLLOWTHIS PROCEDURE MAY DAMAGE THE GASVALVES. Over pressurized gas valves are not cov-ered by warranty. The heater and its gas connectionsshall be leak-tested before placing the appliance inoperation. Use soapy water for leak test. DO NOT usean open flame.Reversing Gas Supply ConnectionReversing the standard fuel connection from the left-hand to the right-hand side is a simple field operation.1. Disconnect all electrical power from the heater (ifapplicable).2. Disconnect the main gas pipe from the heater (ifapplicable).3. Remove the left and right front panels from theheater.4. Locate the main gas line that traverses across theheater above the manifold risers.5. Remove the pipe cap from the right-hand end ofthe main gas line.21Gas SupplyGas piping must have a sediment trap ahead of theheater gas controls, and a manual shut-off valve lo-cated outside the heater jacket. It is recommendedthat a union be installed in the gas supply piping adja-cent to the heater for servicing. A pounds-to-inchesregulator must be installed to reduce the gas supplypressure to a maximum of 10.5 in. WC for natural gasand 13.0 in. WC for propane gas. The regulator shouldbe placed a minimum distance of 10 times the pipediameter up-stream of the heater gas controls. Referto Table K for maximum pipe lengths.Gas Supply ConnectionThe heater must be isolated from the gas supply pip-ing system by closing the manual shut-off valve duringany pressure testing of the gas supply piping systemCAUTION: The heater must be disconnected fromthe gas supply during any pressure testing of the gassupply system at test pressures in excess of 1/2 psi(3.45 kPa).Fig. 16: Gas Supply ConnectionCAUTION: Do not use Teflon tape on gas line pipethread. A pipe compound rated for use with naturaland propane gases is recommended. Applysparingly only on male pipe ends, leaving the twoend threads bare.CAUTION: Support gas supply piping withhangers, not by the heater or its accessories. Makesure the gas piping is protected from physicaldamage and freezing, where required.3/4" 1” 1-1/4” 1-1/2” 2” 2-1/2”ModelNo. N P N P N P N P N P N P302B 15 25 35 85 150 380 360 -- -- -- -- --402B -- 15 25 60 100 260 250 -- -- -- -- --502B -- -- -- -- 65 150 130 360 500 -- -- --652B -- -- -- -- 45 100 95 250 340 -- -- --752B -- -- -- -- 35 80 75 180 260 600 -- --902B -- -- -- -- 20 45 45 110 150 360 400 --Table K: Maximum Equivalent Pipe LengthDANGER: Make sure the gas on which the heaterwill operate is the same type as specified on theheater’s rating plate.Natural gas – 1,000 BTU per ft3 , .60 specific gravity at 0.5 in. WC pressure dropPropane gas – 2,500 BTU per ft 3 , 1.53 specific gravity at 0.6 in. WC pressure drop