Specifications

6 720 644 956
Operation instructions
29
8.8 Fan speed
8.8.1 Fan speed adjustment
IMPORTANT! Installation adjustment:
After installing the water heater, the fan speed values for
minimum power (P2) and maximum power (P1) may
need adjustment due to variations in altitude.
Failure to make necessary adjustments to fan speed
values may result in improper operation of the
appliance.
Use the equivalent vent length value to determine the
appropriate fan speed value found in the Table 5. Refer
to page 29 on how to adjust the fan speeds if an
adjustment is necessary. After changing fan speed
values, proceed to section 9.4 to confirm CO2 values
are within specified ranges.
Fan speed adjustment
Adjusting minimum power fan speed (P2)
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. 51
B As soon as '188' is displayed, release "Program"
button , and the display should read P2.
B Press or to choose the fan speed suitable
with your installation, see Table 5.
B Press and hold (± 5 sec.) “Program” button until
the display flashes, then the selected value is memo-
rized.
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. 52
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 “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 5.
B Press and hold (± 5 sec.) “Program” button until
the display flashes, then the selected value is memo-
rized.
Natural Gas Liquid propane
Altitude
(above sea
Minimum power
fan speed (P2)
Maximum power fan
speed (P1)
Maximum power fan
speed (P1)
0 - 2000 ft
(0 - 610 m)
7
No
modification required
No
modification required
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
2000 - 4500 ft
(610 - 1372 m)
8* 48* 47*
4500 - 8000 ft
(1372 - 2439 m)
9* 49*
48*
* Above 2000 ft, CO
2
levels must be checked with a combustion gas analyzer, see section 9.4 for instructions.
Table 5 Fan speed adjustment
i
Do not set P2 to greater then 9.
i
Proceed directly to Section 9.4 to confirm
CO
2
values are within range.