Bosch C 950 - Page 35

Installation instructions
35
C 950/C 1050 (Pro TL 175 C/199 C) – 6 720 805 440 (2019/10)
Table 33 Fan speed adjustment for 4" piping
Natural Gas Liquid
propane
Natural Gas Liquid
propane
Altitude (above
sea level)
Vent
terminal
Total equivalent
vent length
1)
Minimum
power fan
speed (P2)
Minimum
power fan
speed (P2)
Maximum
power fan
speed (P1)
Maximum
power fan
speed (P1)
0 - 2000 ft
(0 - 610 m)
Concentric 3.5 - 39 ft No modification required on installations below 2000 ft Altitude
40 - 86 ft
Twin
system
3.5 - 59 ft
60 - 126 ft
2000 - 4500 ft
(610 - 1372 m)
Concentric 3.5 - 39 ft 11* 14* 47* 47* 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
40 - 86 ft 11* 14* 48* 48*
Twin
system
3.5 - 59 ft 10* 13* 47* 47*
60 - 126 ft 11* 14* 48* 48*
4500 - 8000 ft
(1372 - 2439 m)
Concentric 3.5 - 39 ft 11* 14* 48* 48*
40 - 86 ft 13* 16* 48* 48*
Twin
system
3.5 - 59 ft 11* 14* 48* 48*
60 - 126 ft 12* 15* 48* 48*
* Above 2000 ft, CO2 levels must be checked with a combustion gas analyzer, see chapter 7.5 for instructions.
1) Full equivalent length (inlet + outlet piping + fittings)