Raypak 155C User Manual download pdf (Page 15)

GAS SUPPLY CONNECTIONS

Gas piping must have a sediment trap ahead of the

heater gas controls, and a manual shut-off valve lo-

cated outside the heater jacket. All gas piping should

be tested after installation in accordance with local

codes.

CAUTION: The heater and its manual shut off valve

must be disconnected from the gas supply during any

pressure testing of that system at test pressures in

excess of 1/2 psig (3.45 KPA). Dissipate test pressure

in the gas supply line before reconnecting the heater

and its manual shut off valve to gas supply line.

FAILURE TO FOLLOW THIS PROCEDURE MAY

DAMAGE THE GAS VALVE. OVER PRESSURED

GAS VALVES ARE NOT COVERED BY WARRANTY.

The heater and its gas connections shall be leak tested

before placing the appliance in operation. Use soapy

water for leak test. Do NOT use open flame.

NOTE: Do not use teflon tape on gas line pipe thread.

A flexible sealant is recommended.

A minimum of 7" W.C. and a maximum of 14" W.C.

upstream pressure under load, and no load conditions

must be provided for natural gas or a minimum of 12"

W.C. and a maximum of 14" for propane gas.

GAS PRESSURE REGULATOR

The gas pressure regulator is present and sealed

at 4"W.C. for natural gas, and 11"W.C. for propane

gas. Between the gas valve and the burners is a 1/8"

pipe plug. The pressure at this point , taken with a

manometer, should be about 3.7"W.C. natural gas

and 10.5"W.C. propane gas. If an adjustment is

needed, remove seal and turn adjustment screw

clockwise

to increase pressure or counter-clockwise

to decrease pressure.

ROBERTSHAW VALVE

W. C. adjustment

HONEYWELL VALVE

W. C. adjustment

PIPE SIZING FOR GAS CONNECTIONS

MAXIMUM EQUIVALENT PIPE LENGTH

Natural Gas 1000BTU/FT

.60 Specific Gravity

@ 0.5" WC Pressure Drop

Propane Gas 2500BTU/FT

1.53 Specific Gravity

@ 0.5" WC Pressure Drop

MODEL

155B

1/2" 3/4" 1"

N P N P N P

15 35 60 145 200 500

Fig. # 8090.1

Fig. # 8149.1

Fig. # 8081.0

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 33 34

Comments to this Manuals

No comments

Raypak 155C User Manual Page 15

Comments to this Manuals

Related products and manuals for Water equipment Raypak 155C