11. Turn outlet pressure test screw to seal the pressure port
(clockwise, 7in-lb minimum)
12. Turn on the electrical power to the system.
13. Make a call for heat on the thermostat.
14. Using a leak detection solution or soap suds, check for
leaks at the pressure boss screw. If a leak is detected,
SHUT OFF GAS AND FIX ALL LEAKS IMMEDIATELY.
Figure 13 – Two stage gas valve
Figure 14 – Adjustment screw
Figure 15 – Typical gas pipe arrangement
Table 4 – Inlet Gas Pressure
Gas Pressure in.w.c. (psig)
Minimum
Maximum
Natural Gas
4.5
10.5
Propane
11.0
13.0
Table 5 – Outlet gas pressure
Gas Pressure in. w.c.
Input
Natural Gas
Propane
High fire (100%)
3.0
8.6
Low fire (70%)
1.55
5.0
Table 6 – Maximum capacity of pipe Ft³/hr for pipe length ft (m)
Nominal Iron pipe size in. (mm)
Internal dia. in. (mm)
10 (3.0)
20 (6.0)
30 (9.1)
40 (12.1)
50 (15.2)
1/2 (13)
0.622 (158)
175
120
97
82
73
3/4(19)
0.824 (20.9)
360
250
200
170
151
1 (25)
1.049 (26.6)
680
465
375
320
285
1-1/4 (32)
1.380 (35.0)
1400
950
770
660
580
1-1/2 (39)
1.610 (40.9)
2100
1460
1180
990
900
CFH = Furnace input (BTH/hr)/Heating value of gas (BTU/ft³)
16
Summary of Contents for C105-2-V
Page 24: ...Figure 29 Direct vent clearance 23 ...
Page 25: ...Figure 30 Other than Direct vent clearance 24 ...
Page 32: ...Figure 31 Dimensions 31 ...
Page 33: ...Figure 32 Two Stage ECM Wiring diagram 32 ...
Page 36: ...Figure 33 Exploded view Cxx 2 V part 1 35 ...
