Modine Manufacturing MPR Series, Инструкция по установке и обслуживанию

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57 MCP15-500.9
Energy Recovery Exhaust Assembly
If the unit is equipped with a Modine supplied Energy Recovery
Exhaust section, check the following:
1. The energy recovery wheel drive belt is a linked belt that
resists stretching, however any natural stretching may
affect wheel rotation and energy recovery performance.
The belt should be checked periodically, especially within
the first 400 hours of operation. If too loose, the belt can be
tightened by removing link(s) to shorten the belt.
2. The bearings are permanently lubricated and under normal
operating conditions maintenance is not required.
3. The wheel is to be checked for cleanliness. In most cases,
the counterflow airflow will allow the rotary wheel to self-
clean itself of contaminants that may adhere to the surface
of the wheel. In situations where self-cleaning is not
sufficient, the wheel can be cleaned with a vacuum and
brush to clear any buildup.
4. Check wheel to housing seals and replace if worn. To
check the seal, slide a piece of paper ("feeler gauge”)
between the seal and the media at multiple locations on
both sides of the bearing beam as you rotate the wheel
slowly by hand (clockwise when viewed from the pulley
side). Verify that the media slightly grabs the paper during
the rotation. If necessary, loosen adjusting screws along
the bearing beam and re-set seal to a slight interference fit
with the wheel media.
Note: The wheel assembly can be partially slid out of the
cabinet for maintenance if desired. The wheel should not be
slid out more than 50% of the width to prevent the wheel from
tipping out of the cabinet.
Energy Recovery Wheel Electric Preheat
When providing annual maintenance for the electric preheat
(if equipped), keep the unit free from dust, dirt, grease and
foreign matter. Pay particular attention to:
1. The heating elements should be checked annually for
cracks and discoloration. If a crack is detected, the heating
elements should be replaced before the unit is put back
into service. If the elements are dark gray, airflow across
the heating elements should be checked to ensure that a
blockage has not occurred or the blower is operating
properly.
2. The electrical connections should be checked annually for
general cleanliness and tightness.
3. The controls should be checked to ensure that the unit is
operating properly.
MAINTENANCE - CONTINUED
Exhaust/Barometric Relief Dampers
If the unit is equipped with an exhaust fan (Digit 7=B, C, E, or
F) or barometric relief dampers (Digit 7=R), check that the
dampers are clean and manually open/close freely. For units
with power exhaust, the exhaust backdraft dampers are
accessible from inside the exhaust hood. For units with
barometric relief, the dampers are accessible from the end
panel on the module. Refer to Figure 57.1.
Repeat Start-Up Procedure
Once complete, repeat applicable Start-Up Procedure steps as
shown starting on page 18.
Figure 57.1 - Power Exhaust Module & Barometric
Relief Damper Module Access Panel Location
Exhaust Hood
Barometric Relief
Damper
(Model Digit 7=R)
Location of Power
Exhaust Module
Backdraft Damper
(Model Digit 7=C or F)
[not shown]