Paloma PH2-20R OFN Engineering Handbook page 127

13. Adjustment of maximum manifold setting
a. Open the hot water tap fully and make the maximum fl ow.
b. Press and hold down the Adjusting Button (SW3).
c. While holding the Adjusting Button (SW3); momentarily push the Maximum Button (SW2) on the PCB.
(Note: It becomes to the maximum setting forcibly when the water is fl ow.)
Using the manometer, adjust the maximum manifold pressure to the standard pressure (see table below) plus the
previous recorded maximum fan pressure in step 11. (2) b.
d. Every time you press the Maximum Button (SW2), the displayed value is [UP] or [DOWN]. Adjust the value at the
manometer.
e. After adjusted, release the Maximum Button (SW2) fi rst, then release the Adjusting Button (SW3).
14. Adjustment of slow ignition manifold setting
a. Find DIP1 and change DIP switch #1 setting of DIP1 to ON position. DO NOT alter any other DIP switch.
b. Press the Maximum Button (SW2), then press the Minimum Button (SW1) within 2 seconds and hold down both for
more than 5 seconds. The "P" is displayed on the LED of remote control.
c. With the maximum hot water fl ow (open the hot water tap fully), press the Maximum Button (SW2) and measure and
record the fan pressure for the slow ignition point.
d. Press and hold down the Adjusting Button (SW3) and using the manometer, adjust the slow ignition manifold
pressure to the standard pressure (see table below) plus the previous recorded fan pressure for the slow ignition point
in step 14.b. above.
e. Release the Adjusting Button (SW3).
f. Turn off power at remote control.
g. Changed the DIP switch #1 setting of DIP1 to OFF position. DO NOT alter any other DIP switch.
15. Attach the unit's front cover.
16. Turn on gas supply (Note: ensure there are no gas leaks). Turn on water supply (Note: ensure there are no water
leaks).
17. Turn on remote control.
18. Check and ensure safe operation and performance of the water heater.
Standard Pressure (inch in w.c.)
Minimum Capacity
Maximum Capacity
Slow Ignition Point
Minimum Capacity
Maximum Capacity
Slow Ignition Point
PH2-28RDVS
L.P. NAT
0.87/11.0 0.51/7.1 0.87/11.0
3.25/11.0 2.48/7.1 2.80/11.0
1.85/11.0 0.59/7.1 1.85/11.0
PH2-28ROF
L.P. NAT
0.91/11.0 0.63/7.1 0.91/11.0 0.63/7.1
3.35/11.0 3.00/7.1 2.72/11.0 2.52/7.1
2.76/11.0 2.05/7.1 2.76/11.0 2.05/7.1
PH2-25RDVS PH2-20RDVS
L.P. NAT L.P.
0.51/7.1 0.87/11.0 0.51/7.1
2.10/7.1 2.00/11.0 1.50/7.1
0.59/7.1 1.85/11.0 0.59/7.1
PH2-25ROF
L.P. NAT L.P.
0.91/11.0 0.63/7.1
1.93/11.0 1.73/7.1
2.76/11.0 2.05/7.1
NAT
PH2-20ROF
NAT
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