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50ZHK: Owner's Information Manual
Demand Defrost Mode
The defrost mode is factory set to an initial 60-minute time interval. It
may also be adjusted to an initial interval of 30, 90, or 120 minutes.
During operation, the control optimizes current defrost time based on the
previous defrost interval and previous defrost period. If the previous
defrost period is less than 2 minutes for two consecutive defrost cycles
the control will lengthen the defrost interval by 15 minutes, up to a
maximum of 120 minutes or 30 minutes greater than the original
setpoint, whichever comes first. If the previous defrost period is more
than 5 minutes for two consecutive defrost cycles the control will
shorten the defrost interval by 15 minutes, down to a minimum of 30
minutes or 30 minutes from the original setpoint, whichever is first.
After the defrost condition is satisfied, or after a maximum of 10 minutes
in defrost mode, the unit will resume normal heating operation.
Emergency Heating Mode
In the event of primary unit heat failure, the emergency heat mode
allows your supplemental heating source to keep your home or office
warm until your unit can be serviced. Contact your dealer in the event of
primary unit heat failure.
During Emergency Heat, your thermostat will lockout the heat pump and
turn on the supplemental heat, if equipped. You may notice the indoor
fan increase its speed.
Maintenance and Service
This section discusses maintenance that should be performed by your
dealer and care you, as the owner, may wish to handle for your new unit.
Routine Maintenance
All routine maintenance should be handled by skilled, experienced
personnel. Your dealer can help you establish a standard procedure.
To assure proper functioning of the unit, flow of condenser air must not
be obstructed from reaching the unit. Clearance from the top of the unit
is 48 in. (1219 mm). Clearance of at least 36 in. (914 mm) is required on
sides except the power entry side (42 in. [1067 mm] clearance).
Maintenance and Care for the Equipment Owner
Before proceeding with those things you might want to maintain
yourself, please carefully consider the following:
WARNING
!
FIRE, EXPLOSION, ELECTRICAL SHOCK, CUT
HAZARD
Failure to follow this warning could result in personal injury, death or
property damage.
1.
TURN OFF ELECTRICAL POWER TO YOUR UNIT
BEFORE SERVICING OR PERFORMING MAINTENANCE
AND INSTALL A LOCK-OUT TAG.
2.
When removing access panels or performing
functions inside your unit, be aware of sharp sheet metal parts
and screws. Although special care is taken to reduce sharp
edges to a minimum, be extremely careful when handling parts
or reaching into the unit.
Air Filters
The air filter(s) should be checked every 3 or 4 weeks and changed or
cleaned whenever it becomes dirty. Dirty filters produce excessive stress
on the blower motor and can cause the motor to overheat and shut down.
This unit must have an air filter in place before it can be operated. These
filters should be located in at least one of two places. In many
applications, the installer will provide return air filter grilles mounted on
the wall or ceiling of the conditioned structure. In the instance of filter
grilles, the filters can simply be removed from the grille and replaced.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Table 1
indicates the correct indoor filter size for your unit.
When installing the new filter(s), note the direction of the airflow arrows
on the filter frame.
If you have difficulty locating your air filter(s) or have questions
concerning proper filter maintenance, contact your dealer for
instructions. When replacing filters, always use the same size and type of
filter that was supplied originally by the installer.
FIRE AND UNIT OPERATION HAZARD
Failure to follow this warning could result in personal injury, death or
property damage.
Never operate your unit without filters in place. An accumulation of
dust and lint on internal parts of your unit can cause loss of efficiency.
Fans and Fan Motor
Periodically check the condition of fan wheels and housings and
fan-motor shaft bearings. Contact your dealer for the required annual
maintenance.
Indoor and Outdoor Coils
Cleaning of the coils should only be done by qualified service personnel.
Contact your dealer for the required annual maintenance.
Condensate Drain
The drain pan and condensate drain line should be checked and cleaned
at the same time the cooling coils are checked by your dealer.
Compressor
All compressors are hermetically sealed and do not require periodic
maintenance.
Condenser Fan
PERSONAL INJURY AND UNIT DAMAGE HAZARD
Failure to follow this warning could result in personal injury, death or
property damage.
Do not poke sticks, screwdrivers, or any other object into revolving fan
blades.
maintenance
The fan must be kept free of all obstructions to ensure proper cooling.
Contact your dealer for any required service.
Electrical Controls and Wiring
Electrical controls are difficult to check without proper instrumentation.
If there are any discrepancies in the operating cycle, contact your local
dealer and request service.
Refrigerant Circuit
The refrigerant circuit is difficult to check for leaks without the proper
equipment. If inadequate cooling is suspected, contact your local dealer
for service.
3
Table 1 – Indoor Air Filter Data
Unit Size
024
20x20x1 (508x508x25 mm)
030-036
24x30x1 (610x762x25 mm)
042-060
24x36x1 (610x914x25 mm)
WARNING
!
WARNING
!
Filter Size
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