York D4IC-360, Technical Information

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siphon are not obstructed. Make sure the water evacuates
correctly. Prime the siphon (fill with water) if necessary.
-
Outdoor coils:
Eliminate any dirt or residues on the surface
of both sides of the coils, and in the V-shaped air passage
section formed by the coils. Clean the surface of the fins
with a soft brush or compressed air, taking care not to dam-
age them. As these are exposed to outdoor environmental
conditions, it might be necessary to use water with an
adequate detergent for cleaning. In this case, and always
from the inside out, apply from top to bottom.
- Outdoor air intake:
If the unit is equipped with any of the
economiser, motor-driven damper or fixed outdoor air intake
accessories, maintenance should also be applied to the air
filters included inside the rain hood. These are aluminium
mesh filters. Make sure both the mesh as well as the frame
are in good condition. Wash with water and an adequate
detergent, if necessary. Pay attention to the arrow on the
frame, which indicates the air flow direction and should point
towards the interior of the unit. See Fig. 22.
-
Refrigerant circuit:
This circuit should be checked in
depth at the beginning of each cooling or heating season:
Operating pressures, control elements, temperature steps,
etc.
-
Mechanical and electrical operation:
Also at the begin-
ning of each season, check the amperage of all motors, the
conditions of electrical connections and operation of safety
controls. The bearings of the outdoor as well as indoor fan
motors are of the permanent lubrication type and, therefore,
do not require maintenance.
If the unit is equipped with any of the economiser, mo-
tor-driven damper or extracting barometric damper ac-
cessories, check for correct operation of air dampers and
motors.
If equipped with the axial extraction fan accessory, check
the conditions and operation of the control unit.
If equipped with fixed outdoor air intake, check the condi-
tions of the air damper, and the reliability of remaining
open.
- Structure integrity and unit components: Check the
conditions of the structure and outdoor components of
the unit, absence of bruises or dents, tightness of screws,
etc.
Check correct closing of access doors, including conditions
of the airtight gasket and locks.
- Hot water coil: If the unit is equipped with this accessory,
check operation of the control elements, water level in
the system and air purge of the coil, at the beginning of
each heating season. Depending upon the area and the
installation, and if necessary, make sure the proportion of
antifreeze is correct
- Fig. 22 -
Outdoor air intake aluminium mesh filters
PAY ATTENTION TO THE POSITION OF THE
FILTERS AS PER ARROW (ON THE FRAME)
INDICATING AIR FLOW DIRECTION
REMOVAL OF ALUMINIUM MESH FILTERS
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LOOSEN THE KNOB BY TURNING MANUALLY, UNTIL THE FILTER
HOUSING IS CLEAR.
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SLIDE THE HOUSING DOWNWARDS, WITH THE FILTERS.
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REMOVE THE FILTERS.
TO REINSTALL THE FILTERS, PROCEED INVERSELY
FILTERS
(X2)
GUIDE SCREWS
(NEVER LOOSEN)
FILTER
HOUSING
KNOB
(X4)
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