Raypak B0200 Owner's Manual page 29

GAS INLET PRESSURE
IMPORTANT – CHECK the gas supply pressure at the inlet to the water heater with the water heater and all other
gas burning appliances in the premises operating (burners alight). The minimum gas supply pressures are:
Natural Gas - 1.13 kPa
If this minimum cannot be achieved, it may indicate the meter or the gas line to the water heater is undersized. It is
important to ensure that an adequate gas supply pressure is available to the water heater when other gas burning
appliances, on the same gas supply, are operating.
GAS PRESSURE ADJUSTMENT
On/Off Models
To adjust the burner pressure on a water heater with the Honeywell
Smart Valve, proceed as follows:
Remove the gas control cover.
Remove the screw and washer from the outlet pressure tap.
Attach a manometer to the outlet pressure tap.
Remove the cap from the pressure regulator adjuster.
With the main burner operating, adjust the pressure regulator (clockwise to
increase or anti-clockwise to decrease) to achieve the burner pressure as
specified on the rating label (refer to
Turn off the water heater.
Replace the cap on the pressure regulator adjuster.
Disconnect the manometer and replace the pressure tap screw and washer.
Check for gas leaks, using soapy water.
Replace the gas control cover.
Modulating Models
To adjust the burner pressure on a water heater with the Robertshaw 7000 Series modulating gas control, proceed
as follows:
Remove the gas control cover.
Remove the screw and washer from the outlet pressure tap on the
gas control.
Attach a manometer to the outlet pressure tap.
Remove the cap from the Jeavons gas pressure regulator.
Operate the main burner at high fire, This can usually be achieved by
turning the temperature control to the „HI‟ position. Refer to
"Temperature Control" on page 33.
Adjust the pressure regulator (clockwise to increase or anti-clockwise to
decrease) to achieve the burner pressure as specified on the rating
label (refer to "Location of
Turn off the water heater.
Replace the cap on the pressure regulator adjuster.
Disconnect the manometer and replace the pressure tap screw and washer.
Check for gas leaks, using soapy water.
Replace the gas control cover.
Propane - 2.75 kPa
"Location of Controls" on page 25).
Controls" on page 25).
Regulator Cap
29
Pressure Tap
Robertshaw
Regulator Cap
Pressure Tap