Gas Supply Connections; Gas Pressure; Water Connections & System Piping - Raypak 0180B Type H Installation And Operating Instructions Manual

Model

Gas Supply Connections

The inlet gas connection of the boiler gas valve is 1/2".
Provide an adequate gas piping supply line no smaller
than 1/2", according to Table H above.
Gas piping must have a sediment trap ahead of the
boiler gas controls, and a manual shut-off valve locat-
ed outside the jacket. All gas piping should be tested
after installation in accordance with local codes.
Manual
Valve
Sediment Trap
Fig. 14: Sediment Trap
CAUTION: The boiler 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 psi (3.45 kPa). Dissipate test
pressure in the gas supply line before reconnecting
the boiler and its manual shut-off valve to gas supply
line. FAILURE TO FOLLOW THIS PROCEDURE
MAY DAMAGE THE
PRESSURED GAS VALVES ARE NOT COVERED
BY WARRANTY. The boiler 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.
1/2 in. Pipe 3/4 in. Pipe
No.
Nat. Pro. Nat.
0042 125 350 500
0066 60 160 175
0090 30 80 125
0135 15 40
0180 20
Table H: Maximum Equivalent Pipe Length (Feet)
Union
Gas Valve
Must be Supplied by Installer
GAS VALVE. OVER
1 in. Pipe
Pro. Nat. Pro.
460
300 400
60 150 200 450
35 90 115 300
NOTE: Do not use teflon tape on gas line pipe
thread. A flexible sealant suitable for use with Natural
and Propane gases is recommended.
These boilers are also certified to operate on propane
gas, when equipped with the combination gas valve
and orifices (pilot and main burners) sized for propane
gas.

Gas Pressure

The gas valve is provided with pressure taps to meas-
ure gas pressure upstream of the gas valve and
downstream which is the same as the manifold pres-
sure.
Gas Type
Natural
Propane
Table I: Minimum and Maximum Gas Pressure
Water Connections & System
Piping
The pipe size for water connections is shown on page
6. Typical piping systems are shown on pages 17 to
19.
This boiler is supplied with a circulator and built-in
bypass as standard to ensure the required minimum
water flow in the boiler. The bypass on models H-0135
and H-0180 is provided with an adjustable valve that is
factory-set in the full open position. The handle is
15
1 1/4 in. Pipe
Nat. Pro.
425
Inches Inches
WC Min. WC Max.
7.0 10.5
12.0 13.0
Regulator
Setting
3.5
11.0