Gas Supply Connections - Rheem Raypak 207A Installation And Operation Manual

8' (2.4 m)
OR LESS
2' MIN
(0.6 m)
VENT PIPE
DRAFT HOOD
HEATER
Figure 11. Venting Clearances
NOTE: With venting application of two or more heaters,
contact the factory.

Gas Supply Connections

MANUAL
GAS INLET
SHUTOFF
VALVE
(Field-supplied)
FINISH FLANGE
3" MIN
(76 mm)
Typical
UNION
(Field-supplied)
SEDIMENT TRAP
(Field-supplied)
Figure 12. Gas Supply Plumbing
Gas piping must have a sediment trap ahead of the
heater gas controls, and a manual shutoff valve located
outside the heater jacket. All gas piping should be tested
after installation in accordance with local codes.
A CAUTION: The heater and its manual shutoff 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 heater and
its manual shutoff valve to gas supply line. FAILURE
TO FOLLOW THIS PROCEDURE MAY DAMAGE THE
GAS VALVE. OVER-PRESSURIZED 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.
VENT CAP
2' MIN
(0.6 m)
5' MIN
(1.5 m)
HEATER JACKET
GAS VALVE
Gas Regulator Best Practices
From the gas pressure regulator it is recommended to
have no less than 10 pipe diameters of straight smooth
pipe downstream of the regulator discharge and to have
no less than 10 linear feet (not including fittings) between
the regulator and the inlet to the appliance for proper
operation.
Figure 13. Manual Shutoff Valve Installation
Supply Pressure
CAUTION: Do not use Teflon tape on gas line pipe
A
thread. Only sealant tape or 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.
A minimum of 5 in. WC and a maximum of 10.5 in. WC
upstream pressure under load and no-load conditions
must be provided for natural gas.
Gas Pressure Regulator
The gas pressure regulator is preset at 3.1 in. WC for
natural gas. The pressure at the gas valve, taken with a
manometer, should be about 3.1 in. WC natural gas. If an
adjustment is needed, remove seal and turn adjustment
screw clockwise to increase pressure or counter-
clockwise to decrease pressure.
MANUAL
SHUTOFF
VALVE
UNION
Figure 14. Manual Shutoff Valve Installation
F10639-4
13