Paloma PH-28RIFSN, Engineering Handbook

Page: 39 / 68

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ON
1 2 3 4
DIP1
ON
OFF
1 2 3 4
SW1 SW2
SW3
High Altitude
Chip Location
LED
Adjusting
Button
DIP Switch
High Altitude Chip for PC Board.
Rating of gas appliances are based on sea level operation and need not be changed for installa-
tions at elevations up to 3,280 feet (1,000 m).
Notice: For installation above 3,280 feet (1,000 m), the PC Board must be set for High
Altitude installation.
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.)
(12) Change the Dip Switch #1 and #2 setting to the “OFF”
position. DO NOT alter any other DIP Switch. (The LED
on the PCB and the display of the remote control stops
illuminating.)
(13) Attach the unit’s front cover.
(14) Turn on the gas shutoff valve and water shutoff valve.
(15) Check and ensure safe operation and performance of
the water heater.
WARNING: ANTI-SCALD WARNING FOR HIGH ALTITUDE USE: If you are installing a PH-28C
Unit that you intend to set a high temperatures of 170-180ºF (77-82ºC), note that the danger
of scalding from steam is greater at high altitudes, especially when pressure drops sud-
denly. Always use such hot water in a closed system where accidental production of steam
cannot harm the operator. Never allow such hot water to come directly from a tap or other
exposes outlet.
WARNING: ERROR CODE 15 AT HIGH ALTITUDE: If your system produces an Error Code 15
at high altitude, water is being boiled in the heat exchanger. The first step in troubleshoot-
ing is to lower the output temperature setting.
WARNING: When PH-28CDVSP (Direct Vent Model, L.P. Gas) is installed at the altitude of
6,561 to 9,840 feet (2,000 to 3,000 m) with the high altitude chip, the maximum vent length
should be reduced 5 feet (1.5 m). Refer to the table of the water heater instruction manual.