Raypak B0109 - Manual (Page 34)

BURNER PRESSURE ADJUSTMENT
34
Hi/Lo Models
To adjust the burner pressure on a water heater with a White Rodgers 36E20 Type 301 Hi/Lo gas control, proceed
as follows:
109 Hi/Lo Models
• Remove the screw and washer from the burner feed pipe pressure tap.
• Attach a manometer to the pressure tap.
• Remove the 20mm plug from the left hand side of the water heater
and remove the cap from the high fire pressure regulator adjuster.
• With the main burner operating on high fire, 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 Controls” on page 29).
NOTE : To ensure the burner is operating at high fire it may be
necessary to increase set point on the thermostat (refer to
“Temperature Control” on page 35).
• Remove the cap from the low fire pressure regulator adjuster.
• With the main burner operating on low fire, 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 Controls” on
page 29).
NOTE : To ensure the burner is operating on low fire it may be necessary to
decrease the set point on the thermostat (refer to “Temperature Control” on
page 35).
• Turn off the water heater.
• Replace the caps on the pressure regulator adjusters and the 20 mm plug in the left hand side panel.
• Disconnect the manometer and replace the pressure tap screw and washer.
• Check for gas leaks, using soapy water.
147 Hi/Lo Models
• Remove the screw and washer from the outlet pressure tap.
• Attach a manometer to the outlet pressure tap.
• Remove the cap from the high fire pressure regulator adjuster.
• With the main burner operating on high fire, 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 Controls” on page 29).
NOTE : To ensure the burner is operating at high fire it may be
necessary to increase set point “SE.1” on the thermostat (refer to
“Temperature Control” on page 36).
• Remove the cap from the low fire pressure regulator adjuster.
• With the main burner operating on low fire, 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 Controls” on page 29).
NOTE : To ensure the burner is operating on low fire it may be necessary to decrease the set point of “SE.2” on
the thermostat (refer to “Temperature Control” on page 36).
• Turn off the water heater.
• Replace the high and low fire caps on the pressure regulator adjusters.
• Disconnect the manometer and replace the pressure tap screw and washer.
• Check for gas leaks, using soapy water.
High fire adjustment
access hole
Regulator Cap
Low fire adjustment
Pressure Tap
Regulator Cap
High fire adjustment
Pressure Tap
Regulator Cap
Low fire adjustment
Regulator Cap
High fire adjustment