Dettson Chinook C15-M-V Instructions D'installation Et Manuel Du Propriétaire page 16

5.4 SETTING GAS PRESSURE
Gas valve is very sensible to outlet pressure adjustment.
Thus, it should be done slowly and only allows for slight
adjustment. Follow those steps to properly adjust the
servo gas valve :
1. With the gas to the unit shut off at the manual gas
valve, remove the outlet pressure tap plug in the
gas valve.
2. Connect the pressure hose from a manometer to
this pressure tap. Turn on the manual gas valve.
3. Make sure the unit is operating at its maximum
capacity and note the pressure. Should be 3.2" w.c.
+/- 0.3 for Natural gas and 8.6" w.c. +/- 0.5 for LP
gas.
4. Insert a small slotted screwdriver into the opening
at the top of the valve. Allow up to 10 seconds for
each change in pressure
Table 6 – Maximum capacity of pipe Cu.ft./Hr for pipe length ft (m)
Nominal Iron pipe size in. (mm)
1/2 (13)
3/4(19)
1 (25)
1-1/4 (32)
1-1/2 (39)
Internal dia. in. (mm) 10 (3.0)
0.622 (158)
0.824 (20.9)
1.049 (26.6)
1.380 (35.0)
1.610 (40.9)
15
5. Turn clockwise to
counterclockwise to decrease pressure.
6. Shut off gas to the unit and place the regulator cap
and the manifold pressure tap.
7. Check unit for leaks
Table 4 – Inlet Gas Pressure
Gas Pressure in.w.c. (psig)
Minimum
Natural 4.5
Gas
Propane 11.0
Table 5 – Outlet gas pressure
Gas Pressure in. w.c.
Input Natural Gas
High fire (100%) 3.2 +/- 0.3
Low fire (40%) 0.8 +/- 0.3
20 (6.0) 30 (9.1)
175 120 97
360 250 200
680 465 375
1400 950 770
2100 1460 1180
increase pressure or
Maximum
10.5
13.0
Propane
8.6 +/- 0.5
2.1 +/- 0.3
40 (12.1) 50 (15.2)
82 73
170 151
320 285
660 580
990 900