Daikin Maverick II MPS062E, Руководство по установке и обслуживанию

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IM 991-2 • MAVERICK II ROOFTOP 94 www.DaikinApplied.com
Maintenance
Unit Storage
Location
The Daikin Rooftop Packaged System is an outdoor unit.
However, the schedule may dictate storage either on the
ground or in its final position at the site. If the unit is stored on
the ground, additional precautions should be taken as follows:
• Make sure that the unit is well supported along the length
of the base rail.
• Make sure that the unit is level (no twists or uneven
ground surface).
• Provide proper drainage around the unit to prevent
flooding of the equipment
• Provide adequate protection from vandalism, mechanical
contact, etc. The condenser fins are particularly
vulnerable to damage by even light contact with ground
based objects.
• Make sure all doors are securely closed.
• Units should be fitted with covers over the supply and
return air openings.
Supply Fans
1. Move the motor base to check and lubricate slides and
lead screws.
2. Remove the drive belts, tag them with the fan name and
unit serial number, and store them in a conditioned space
out of direct sunlight.
3. Turn the supply fan manual motor protectors (MMP) to
the OFF position.
4. Once every two weeks, rotate the fan and motor shafts.
Mark the shaft positions first, to make sure they stop in a
different position.
5. Depending on local climatic conditions, condensate
may collect on components inside the units. To prevent
surface rust and discoloration, spray all bare metal parts
with a rust preventive compound. Pay close attention to
fan shafts, sheaves, bearings, and bearing supports.
Cabinet Sections
Once a month, open a door on each section and verify that no
moisture or debris is accumulating in the unit.
Cooling Circuits
The steps below are necessary only if the unit has been
started.
1. Turn the compressor manual motor protectors (MMP) to
the OFF position.
2. Close the discharge and liquid line refrigerant service
valves on each circuit.
3. Tag the valves as a warning for the technician who
restarts the units.
Gas Furnace
If the unit is equipped with a gas furnace, close the gas shutoff
valve and open furnace control switch S3. For information on
maintenance of the gas furnace, refer to IM 684 .
Control Compartment
1. Daikin Applied recommends that the electronic control
equipment in the unit be stored in a 5% to 95% RH (non-
condensing) environment.
2. It may be necessary to put a heat source (light bulb) in
the main control panel to prevent the accumulation of
atmospheric condensate within the panel.
3. The location and wattage of the heat source is
dependent on local environmental conditions.
4. Check the control compartment every two weeks to
check that the heat source is functional and is adequate
for current conditions.
Restart
CAUTION
Before replacing refrigerant sensors or protective devices, see “Refrigerant
Charge” on page 96 for an important warning to prevent an abrupt loss
of the entire charge.
CAUTION
To service liquid line components,the manual shutoff valve is closed
and refrigerant is pumped into the condenser. The pounds of refrigerant
in the system may exceed the capacity of the condenser, depending on
the amount of refrigerant. Suitable means of containing the refrigerant is
required.
After extended storage, perform a complete start up. Inevitable
accumulations of dirt, insect nests, etc. can contribute to
problems if not cleaned out thoroughly prior to startup. In
addition, thermal cycling tends to loosen mechanical and
electrical connections. Following the startup procedure helps
discover these and other issues that may have developed
during the storage interval.