Gas Supply Connection - Raypak 399B-2339B Installation & Operating Instructions Manual

regulator must be installed to reduce the gas supply
pressure to a maximum of 10.5 in. WC for natural gas
and 13.0 in. WC for propane gas. The regulator should
be placed a minimum distance of 10 times the pipe
diameter up-stream of the heater gas controls. Refer
to Table I for maximum pipe lengths.

Gas Supply Connection

CAUTION: The heater must be disconnected from
the gas supply during any pressure testing of the gas
supply system at test pressures in excess of 1/2 psi
(3.45 kPa).
The heater must be isolated from the gas supply pip-
ing system by closing the manual shut-off valve during
any pressure testing of the gas supply piping system
at test pressures equal to or less than 1/2 psi (3.45
kPa). Relieve test pressure in the gas supply line prior
to reconnecting the heater and its manual shut-off
valve to the gas supply line. FAILURE TO FOLLOW
THIS PROCEDURE MAY DAMAGE THE GAS
VALVES. Over pressurized gas valves are not cov-
ered 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
an open flame.
3/4"
Model
No.
N P
399B 15
499B
649B
749B
899B
989B
1259B
1529B
1799B
1999B
2069B
2339B
Natural gas – 1,000 BTU per ft
Propane gas – 2,500 BTU per ft
1" 1-1/4"
N P N P
25 60 100 260
65 150
45 100
35 80
20 45
3
, .60 specific gravity at 0.5 in. WC pressure drop
3
, 1.53 specific gravity at 0.6 in. WC pressure drop
Table I: Maximum Equivalent Pipe Length
Fig. 14: Gas Supply Connection
CAUTION: Do not use Teflon tape on gas line pipe
thread. A pipe compound rated for use with natural
and propane gases is recommended. Apply
sparingly only on male pipe ends, leaving the two
end threads bare.
1-1/2" 2"
N P N P
250
130 360 500
95 250 340
75 180 260 600
45 110 150 360
120 300
75 180
50 120
40 100
30 80
30 80
20 55
19
2-1/2" 3"
N P N P
400
300
170 325 560
125 250 400
100 225 340
75 175 260
75 175 260
55 135 160 400
4"
N P
600