COMMISSIONING
49
Minimum test point gas pressure
Refer to the rating label on the water heater for the minimum test point gas pressure.
1. Open a hot tap slowly until the burners ignite.
2. Press and hold down the MIN button (“1L” is shown
on the LED display), and observe the reading on
the manometer.
3. Release the MIN button. If the manometer reading
observed in Step 2 agrees with the rating label, no
further adjustment is required.
4. To adjust, press and hold down the adjuster button
(“LH” is shown on the LED display).
Note:
The adjuster button must be held down
continuously through steps 4 to 6.
5. Press the MIN button and observe the reading on
the manometer.
Note:
While the MIN button is pressed, the gas
pressure will at first increase then decrease,
cycling between an upper gas pressure limit (39 on
LED display) and a lower gas pressure limit (01 on
LED display).
6. Release the MIN button when the reading on the manometer agrees with the rating label.
7. Release the adjuster button.
Notes:
•
If the burners extinguish and / or an error code starts to flash on the display, release the MIN and
adjuster buttons, close the hot tap, clear the error code, turn on the water heater and recommence
the procedure from Step 1.
•
If the adjuster button is released before Step 6, clear any error code (if displayed) and recommence
the procedure from Step 1.
•
To clear an error code, refer to
“Error Codes”
on page 16.
L.E.D.
display
test point
orifice
washer
test point
screw
min button
max button
adjuster button
manometer
