Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 4 – INITIAL START-UP
OMM-0078_0J
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
Page
57
of
196
GF-128
Phone: 800-526-0288
PRI: 11/22/2013
Propane Combustion Calibration -
Continued
17. Following combustion calibration at the 16% valve position, check the combustion readings
at each of the valve positions listed below and record the readings on the Start-Up &
Registration data sheets provided with the unit. During these checks,
DO NOT
attempt to
adjust the downstream gas pressure using the SSOV gas pressure adjustment screw.
NOTE
Based on the water heater load, it may not be possible to obtain data at all of
the points listed without encountering an Over-Temp condition.
18. Valve Positions to be checked:
•
20%,
•
30%,
•
40%,
•
50%,
•
60%,
•
80%,
•
100%
This completes the Propane 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” 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.
4.6 TEMPERATURE CONTROL CALIBRATION
The unit normally comes factory set and calibrated for a 130°F setpoint (default value). However,
if a different setpoint temperature is desired, it can be changed using the procedure in section
4.6.1. If the setpoint is changed, it must be done prior to temperature control calibration.
There are two primary adjustments for performing temperature calibration. These are Min Load
Adj and Max Load Adj (minimum and maximum load adjustment).
Adjustments to these settings are made at minimum and maximum load conditions and should be
made in small increments from 1 to 3 degrees. After making an adjustment, the outlet water
temperature must be allowed to settle for several minutes prior to making any further
adjustments.
