6 720 608 782
Installation instructions
25
HIGH ALTITUDE OPERATION
The maximum fan speed setting (P1) may need to be adjusted depending on the altitude of the installation. (see Table
14). If the P1 fan speed is changed, CO2 levels must be checked and confirmed with a combustion gas analyzer (see
chapter 6.4 page 31, for details).
Adjusting maximum power fan speed P1
To select fan speed:
B Press ON/OFF button into OFF.
B Press and hold "Program" button and press ON/OFF
button to turn appliance ON.
Fig. 34
B As soon as '188' is displayed, release "Program" but-
ton , and the display reads P2.
B Press the minus button to display P1.
B Press "P" program button to enter P1 adjustment.
The current setting will appear on the display.
B Press + or - to choose the fan speed suitable with
your installation, see Table 14.
B Press and hold (± 5 sec.) “Program” button until the
display flashes, then the selected value is memorized
Natural Gas Liquid propane
Altitude
(above sea
level)
Vent
terminal
Pipe
length
1)
Fan speed Fan speed
0 - 2000 ft
(0 - 610 m)
Twin
system
3 - 32 ft
No
modification
No
modification
For operation at elevations
above 2,000 ft (610 m)
the equipment ratings
shall be reduced at the
rate of 4% for each 1,000
ft (305 m) above sea level
33 - 52 ft
2000 - 4500 ft
(610 - 1372 m)
Twin
system
3 - 32 ft 40
CO
2
adjustment with flue gas analyzer required,
see section 6.4 for instructions.
33 - 52 ft 41
4500 - 8000 ft
(1372 - 2439 m)
Twin
system
3 - 32 ft 41
Not approved
33 - 52 ft 41
Table 14 Fan speed adjustment
1) Full equivalent length (inlet + outlet piping + fittings. See Table 4)
i
Proceed directly to Section 6.4 to confirm
CO2 values are within range.
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