Paloma PH-28RIFSN, Engineering Handbook

Page: 38 / 68

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For High Altitude Installation Above 3,280 Feet (1,000 M):
WARNING: Improper adjustment, alteration, service or maintenance can cause property
damage, personal injury, or death.
High Altitude DIP Switch Adjustment
When the water heater is installed above 3,280 feet (1,000 m)
or when the Burner Control Assembly (PCB) was replaced,
the adjustment of the High Altitude Chip is required for high
altitude installation.
Without adjusting the PCB by the High Altitude Chip, the
water heater may not function properly.
NOTICE: A different High Altitude
Chip is required for every 3,280
feet (1,000 m). The High Altitude
Chip is not interchangeable
between Indoor, Outdoor and
Direct Vent models, types of gas
and serial number. Check the
number on the High Altitude Chip.
(Refer to the table comes with the
chip.)
ON
1 2 3 4 DIP1
ON
OFF
1 2 3 4
SW1 SW2
SW3
ON
1 2 3 4
DIP1D
IP
1
ONO
N
OFFO
F
F
1 2 3
4
Setting during adjustment
to DIP Switch #1 and #2
for High Altitude.
ON
1
2 3 4
As set from factory
ON
1
2 3 4
ON
1 2 3
4
Setting after adjustment
to DIP Switch #1 and #2
for High Altitude.
Notice: If the water heater is installed less than 3,280 feet
(1,000 m), no High Altitude Chip is required or supplied
and no action is required.
How to adjust the High Altitude Chip on the PCB for high
altitude installation:
(1) Check the altitude (above sea level) where the water
heater is installed.
(2) If the altitude is more than 3,280 feet (1,000 m), the
adjustment of the High Altitude Chip is required.
(3) Ensure that you have the correct High Altitude Chip
for proper model, gas type and altitude.
(4) Disconnect the electric power to the water heater. Turn off
the gas shutoff valve and water shutoff valve.
(5) Remove the front cover.
(6) Place High Altitude Chip as shown on PCB (Refer to
diagram on this section.)
(7) Turn on the electric power.
(8) Find the DIP Switch #1 and #2 located at the top left hand
side of the PCB (Refer to illustration for DIP Switch
location).
(9) Change the DIP Switch #1 and #2 setting to the “ON”
position. DO NOT alter any other DIP Switch. (The LED
on the PCB is flashing. At the same time, the display of
the MAIN/BATH remote control starts to flash.)
(10) Find the Adjusting Button located at the top left hand
side of the PCB.
(11) Press the Adjusting Button until the LED on the PCB
(the display of the remote control) changes “Flashing” to
“Illuminating”.
Location of DIP Switches on PC Board.