Installation Manual

6 720 644 930
20
Installation instructions
Fan speed adjustment
Natural Gas Liquid propane
Altitude
(above sea
level)
Total
equivalent
vent length
1)
Minimum
power fan
speed (P2)
Maximum
power fan speed
(P1)
Maximum
power fan speed
(P1)
0 - 2000 ft
(0 - 610 m)
3.5 - 32 ft
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
33 - 57 ft
8
2000 - 4500 ft
(610 - 1372 m)
3.5 - 32 ft 8* 48* 47*
33 - 57 ft 8* 49* 48*
4500 - 8000 ft
(1372 - 2439 m)
3.5 - 32 ft 9* 49*
48*
33 - 57 ft 9* 50* 49*
* Above 2000 ft, CO
2
levels must be checked with a combustion gas analyzer, see section 6.4 for instructions.
Table 19 Fan speed adjustment for 3" piping
1) Full equivalent length (inlet + outlet piping + fittings)
Natural Gas Liquid propane
Altitude
(above sea
level)
Total
equivalent
vent length
1)
Minimum
power fan
speed (P2)
Maximum
power fan speed
(P1)
Maximum
power fan speed
(P1)
0 - 2000 ft
(0 - 610 m)
2.25 - 59 ft
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
60 - 122.5 ft
8
2000 - 4500 ft
(610 - 1372 m)
2.25 - 59 ft 8* 48* 47*
60 - 122.5 ft 8* 49* 48*
4500 - 8000 ft
(1372 - 2439 m)
2.25 - 59 ft 9* 49*
48*
60 - 122.5 ft 9* 50* 49*
* Above 2000 ft, CO
2
levels must be checked with a combustion gas analyzer, see section 6.4 for instructions.
Table 20 Fan speed adjustment for 4" piping
1) Full equivalent length (inlet + outlet piping + fittings)