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Perform the following procedure to check the blower vacuum pressure:
1.
Turn heater off and wait for blower to stop
operating.
2.
Remove screw retaining right side upper access
panel, push panel up, pull bottom of panel away
from heater to disengage bottom retaining arms
and lift panel out from heater.
3.
Remove black cap from blower manifold
pressure test point and attach manometer hose
to test point.
4.
Turn heater on and ensure blower speed is 100%
(full fire).
5.
Take manometer reading.
6.
Turn heater off and wait for blower to stop operating.
7.
Remove manometer hose and replace black cap on test point.
8.
Replace side panel.
Perform the following procedure to replace the air filter:
1.
Turn heater off and wait for blower to stop operating.
2.
Remove two hex head screws retaining air filter box cover and remove cover.
3.
Slide air filter out of air filter box.
4.
Use a vacuum cleaner to remove any dust or foreign matter from inside air
filter box.
5.
Reassemble in reverse order of above using replacement air filter.
Note: The air filter must be replaced.
Do not attempt to clean and reuse the air filter.
NOTE: Use Rheem replacement filters:
•
012553F (300mm X 300mm) for models 910500, 910750 and 911000
•
012552F (400mm X400mm) for models 911250, 911500, 911750 and 912000
•
Inspect 6 monthly
•
Replace when tracking pressure exceeds the following, at 100% fan speed:
Models
910500, 910750, 911250, 911500
911000, 911750, 912000
Table 20: MVB Filter Replacement Tracking Pressure
Tracking Pressure
(kPa)
-0.125
-0.175
107
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