Innovation - Edge [i] Installation, Operation, Maintenance Manual
CHAPTER 6
– MAINTENANCE
OMM-0143_A
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9/6/2019
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6.7 FIRESIDE INSPECTION
Fireside inspection of the Innovation Water Heater includes removing the exhaust manifold,
intake manifold, and the burner assembly from the unit.
The purpose of this inspection is to check for the formation of deposits on the inside of the heat
exchanger tubes, exhaust manifold, and/or the burner assembly. These deposits can be caused
by the presence of even trace amounts of chlorides and/or sulfur, in the combustion air and fuel
sources. Such deposits can be influenced by the extent of the condensing operation and the
chloride and sulfur levels that can vary significantly from application to application.
Since the fireside inspection will include removal of the exhaust manifold, burner assembly and
intake manifold from the Innovation Water Heater, the following replacement gaskets will be
necessary for reassembly upon completion of the inspection:
Part Number
Quantity
Description
GP-18899
2
Burner Flange Gasket
81048
1
Flame Detector Gasket
81198
1
Intake Manifold Flange Gasket
GP-122537
1
Manifold-To-Heat Exchanger Gasket
The intake manifold may be hot. Therefore, allow the unit to cool sufficiently before starting the
removal process described in the following steps.
Fireside Inspection Instructions
1.
Set the
Controller’s
Enable/Disable
switch to the
Disable
position. Disconnect AC power
from the unit and turn off the gas supply.
2.
Remove the exhaust vent from the exhaust manifold. Use a scraper or blade to separate the
high temperature silicon sealant between the exhaust manifold and vent connector and
remove all sealant from both surfaces in preparation for reassembly.
3.
Remove the side and rear panels from the unit. Also remove the bottom panel of the cabinet
to expose the mechanical room floor beneath the burner. This is needed to provide clearance
for pulling the burner.
4.
Locate the intake manifold at the bottom of the unit's heat exchanger (see Figure 6.7-1 and
6.7-2).
5.
Disconnect the lead wire from the flame detector installed on the intake manifold flange
(Figure 6.3-1).
6.
Remove the two (2) hex standoffs securing the flame detector to the intake manifold (see
Figure 6.3-1 and 6.3-2).
7.
Remove the flame detector and gasket from the intake manifold flange.
8.
Disconnect the cable from the igniter-injector, loosen the compression nut and elbow from the
gas injector tube (Figure 6.3-1), and remove the entire ignition assembly (nut/elbow, solenoid
valve, hose nipple, and gas flex hose) from the manifold flange.
9.
Loosen and remove the igniter-injector
from the intake manifold flange. Retain the clocking
washers (if present), for later reassembly.
10.
Refer to Figure 6.7-1. Loosen and remove the four (4) 1/4-20 cap screws securing the blower
side of the intake manifold (P/N
44106
). DO NOT REMOVE the two 1/4-20 screws and nuts
securing the manifold support bracket.