Raypak B0147, B0109 installation instructions 109 Hi/Lo Models, 147 Hi/Lo Models

Regulator Cap

Low fire adjustment

BURNER PRESSURE ADJUSTMENT

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	Regulator Cap
• Remove the screw and washer from the burner feed pipe pressure tap.	Low fire adjustment
	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	Regulator Cap
necessary to increase set point on the	thermostat	(refer	to
				High fire adjustment
“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).	High fire adjustment
• Turn off the water heater.	access hole

•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).

Regulator Cap

High fire adjustment

Pressure Tap

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.

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