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15.1)
INSTRUCTIONS FOR PRESSURE TEST GAUGE CONNECTION
15.2)
INLET GAS PRESSURE CHECK
1. Turn off all electrical power and manual gas shutoff valve to the system to connect manometer hoses.
2. Turn the pressure test screw in the center of the gas valve test boss (see Figure 1 below) not more than one turn
counterclockwise. Attach a 9 mm hose and manometer over the inlet pressure boss on the valve.
3. Open the gas shutoff valve and Ignite the appliance burner by switching on the electricity supply to the appliance
and check that the manometer reading is as shown in the chart below (see also the Data Label affixed to the
Burner Control Box).
4. Switch off the electricity supply to the appliance and close the gas shutoff valve. Remove the manometer tube from
the gas valve test boss. After testing, carefully seal test point with the provided screw by turning clockwise.
Recommended torque = 1.0 Nm.
15.3)
OUTLET GAS PRESSURE CHECK AND ADJUSTMENTS
All adjustments must be made on the basis of the specific characteristics of the appliance. Check inlet and outlet
pressure using the pressure test points provided. After testing, carefully seal test points with the provided screws.
Recommended torque = 1.0 Nm.
1.
Turn off all electrical power to the system to connect manometer hoses.
2.
Turn the pressure test screw in the center of the gas valve test boss not more than one turn
counterclockwise. Attach a 9 mm hose and manometer over the outlet pressure test boss on the valve
(see Figure 1 below). If regulator needs to be adjusted, see instructions below.
TO ADJUST REGULATOR (step opening Hi/Lo two stage gas valves – SIT No. 843):
Remove the modulator plastic cap A (see Figure 1 below).
MAXIMUM PRESSURE: Power the modulator in the maximum condition – high fire. Keeping the screw C
stationary, turn regulator adjustment hex nut B clockwise to increase presure, or counterclockwise to
decrease pressure. Use a 10 mm spanner. After setting put back the modulator plastic cap.
MINIMUM PRESSURE: Turn off the power supply to the modulator – low fire. Keeping the hex nut B
stationary, turn the screw C clockwise to increase presure, or counterclockwise to decrease pressure. Use a
6 x 1 blade. After setting put back the modulator plastic cap. Reconnect pressure regulator connection (if used).
WARNING: To ensure the correct operation of the modulator it is necessary that the plastic cap A is
returned to its original location.
Form 44201360
Oct 2019
28
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