Raypak P-R185B To P-R405B - Manual (Page 18)

Fig. # 8149
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 preset at 4" W. C. for natural
gas, and 11" W. C. for propane gas. The pressure at the
gas valve, taken with a manometer, should be about 3.7"
W. C. natural gas (3.9" W.C. for Low NOx) 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 pres-
sure.
18
Gas
Pressure
Adjustment
GAS PRESSURE ADJUSTMENT LOCATIONS
MILLIVOLT GAS VALVES
ELECTRONIC IGNITION GAS VALVES
Robertshaw 7000
Models 185 thru 405
Gas
Pressure
Adjustment
Honeywell VR8304
Models 185 thru 405
Robertshaw 7200
Model 185
ELECTRONIC IGNITION GAS VALVES-CONTINUED
Robertshaw 7000 BDER
Model 265-335
Robertshaw 7000 DERHC
Model 405
Gas
Pressure
Adjustment
Gas
Pressure
Adjustment
Fig # 9263
Fig # 9264
Fig # 9328
Fig # 9327
Fig # 9329
Fig. # 9365
ATMOSPHERIC LOW NOx
PIPE SIZING FOR GAS CONNECTIONS
Low NOx units are not available in propane.