Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
Page
62
of
216
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0078_0M
09/11/2015
Phone: 800-526-0288
GF-128
PROPANE GAS Combustion Calibration -
Continued
22.
Repeat steps 16 through 21 for the following valve positions:
80%, 60%, 50%, 40%, 30%, 20%, 18%
Combustion Calibration Readings
Valve
Position
Oxygen (O
2
) %, ± 0.2%
Carbon
Monoxide
(CO)
Flame
µA
INN600
INN800
INN1060
INN1350
100%
5.0%
5.0%
6.0%
4.0%
<150 ppm
> 6
80%
6.0%
6.0%
6.0%
5.0%
<150 ppm
> 6
60%
6.0%
6.0%
6.0%
6.0%
<150 ppm
> 6
50%
6.0%
6.0%
6.0%
6.0%
<150 ppm
> 6
40%
6.0%
6.0%
6.5%
6.0%
<150 ppm
> 6
30%
7.0%
7.0%
7.0%
7.5%
<150 ppm
> 5
20%
6.0%
6.0%
6.0%
6.0%
<150 ppm
> 4
18%
6.0%
6.0%
6.0%
7.0%
<150 ppm
> 3
23.
If the oxygen level at the 18% valve position is too high and the Blower voltage is at the
minimum value, you can adjust the idle screw (TAC valve), which is recessed in the top of
the Air/Fuel Valve (see Figure 4-5 in the previous section). Rotate the screw 1/2 turn
clockwise (CW) to add fuel and reduce the O
2
to the specified level. Recalibration MUST be
performed again from
60% down to 18%
after making a change to the idle screw (TAC
valve).
This completes the PROPANE gas combustion calibration procedure.
4.5 REASSEMBLY
Once the combustion calibration adjustments are properly set, the unit can be reassembled for
service operation.
Reassembly
1.
Set the ON/OFF switch in the
OFF
position.
2.
Disconnect AC power from the unit.
3.
Shut off the gas supply to the unit.
4.
Remove the manometer and barbed fittings and reinstall the NPT plug using a suitable pipe
thread compound.
5.
Remove the combustion analyzer probe from the 1/8” (3.18 mm) vent hole in the exhaust
manifold. Replace the 1/8” NPT plug in the manifold.
6.
Replace the unit’s side panels and front door.
