Watts Aerco Innovation 800 User Manual page 75

Innovation Hot Water Hot Water Boiler User Manual
Since the fireside inspection will include removal of the exhaust manifold, burner assembly and
intake manifold from the Innovation Hot Water Boiler, the following replacement gaskets will be
necessary for reassembly upon completion of the inspection:
Part Number
GP-18899
81048
81136
GP-122537
The intake manifold may be hot. Therefore, allow the unit to cool sufficiently before starting the
removal process described in the following steps.
1. Set the ON/OFF switch on the control panel, to the OFF 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 Figures 6-3 and
6-4).
5. Disconnect the lead wire from the flame detector installed on the intake manifold flange
(Figure 6-2).
6. Remove the two (2) hex standoffs securing the flame detector to the intake manifold (see
Figures 6-1 and 6-2).
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 6-1), 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 6-3. 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.
OMM-0120_0A
GF-128-I
CHAPTER 6 – MAINTENANCE
Quantity Description
2 Burner Flange Gasket
1 Flame Detector Gasket
1 Intake Manifold Flange Gasket
1 Manifold-To-Heat Exchanger Gasket
Fireside Inspection
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
- INTERNATIONAL
Page 75 of 174
11/15/2016