Maintenance; General; Unit Maintenance - Daikin Maverick I MPS A03C Installation And Maintenance Manual

General

Advise The Customer
1. Change the air filters regularly. The heating system
operates better, more efficiently and more economically.
2. Except for the mounting platform, keep all combustible
articles three feet from the unit and exhaust system.
3. Important: Replace all blower doors and compartment
cover after servicing the unit. Do not operate the unit
without all panels and doors securely in place.
4. Do not allow snow or other debris to accumulate in the
vicinity of the unit.

Unit Maintenance

Furnace Section
Power supply to unit must be disconnected before making field connections.
To avoid electrical shock, personal injury or death, be sure to rigorously
adhere to field wiring procedures regarding proper lockout and tagout of
components.
Holes in the exhaust transition or heat exchanger can cause toxic fumes
to enter the building. The exhaust transition or heat exchanger must be
replaced if they have holes or cracks in them. Failure to do so can cause
carbon monoxide poisoning resulting in personal injury or death.
Power supply to unit must be disconnected before making field connections.
To avoid electrical shock, personal injury or death, be sure to rigorously
adhere to field wiring procedures regarding proper lockout and tagout of
components.
The unit's furnace should operate for many years without
excessive scale build-up in flue passageways; however, it
is recommended that a qualified installer, service agency, or
the gas supplier annually inspect the flue passageways, the
exhaust system and the burners for continued safe operation,
paying particular attention to deterioration from corrosion or
other sources.
IM 970-2 • MAVERICK I ROOFTOP
DANGER
DANGER
DANGER
If during inspection the flue passageways and exhaust system
are determined to require cleaning, the following procedures
should be followed (by a qualified installer, service agency, or
gas supplier):
1. Turn OFF the electrical power to the unit and set the
thermostat to the lowest temperature.
2. Shut OFF the gas supply to the unit either at the meter or
at manual valve in the supply piping.
3. Remove the furnace controls access panel and the
control box cover. Disconnect the gas supply piping from
the gas valve.
4. Disconnect the gas supply piping from the gas valve.
5. Disconnect the wiring to the induced draft blower motor,
gas valve, flame sensor, and flame roll-out control, and
ignitor cable. Mark all wires disconnected for proper
reconnection.
6. Remove the screws (4) connecting the burner tray to the
heat exchanger mounting panel.
7. Remove the burner tray and the manifold assembly from
the unit.
8. Remove the screws (5) connecting the induced draft
blower to the collector box and screws (18) connecting
the collector box to the heat exchanger center panel.
Remove the induced draft blower and the collector box
from the unit.
9. Remove the screws (3) connecting the divider plate to
the heat exchanger center panel.
10. Remove the turbulators from inside the heat
exchangers by inserting the blade of a screwdriver
under the locking tabs. Pop the tabs out of the
expanded grooves of the heat exchanger. Slide the
turbulators out of the heat exchangers.
11. Direct a water hose into the outlet of the heat
exchanger top. Flush the inside of each heat exchanger
tube with water. Blow out each tube with air to remove
excessive moisture.
12. Reassemble (steps 1 through 10 in reverse order). Be
careful not to strip out the screw holes used to mount
the collector box and inducer blower. Replace inducer
blower gasket and collector box gasket with factory
replacements if damaged.
The manufacturer recommends that a qualified installer, service
agency or the gas supplier visually inspect the burner flames for
the desired flame appearance at the beginning of the heating
season and approximately midway in heating season.
The manufacturer also recommends that a qualified installer,
service agency or the gas supplier clean the flame sensor with
steel wool at the beginning of the heating season.
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