50JZ
Single-Packaged 50Hz, CE Electric Heat Pump Units
with Puron® (R-410A) Refrigerant
A Guide to Operating and Maintaining Your
Single-Packaged Electric Heat Pump Units
NOTE: Read the entire instruction manual before starting the
installation.
2. Ice or frost tends to form on the coil during winter heating
operation. Your heat pump is designed to automatically melt
the ice. When in this defrost cycle, it is normal for steam or
fog to rise from the outdoor unit. Do not be alarmed!
SAFETY CONSIDERATIONS
Note to Installer:This manual should be left with the equipment
user.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of these or any other appliances. Failure
to follow this warning could result in fire, serious injury, or
death.
Do not use this unit if any part has been under water.
Immediately call a qualified service technician to inspect the
unit and to replace any part of the control system which has
been under water. Failure to follow this warning could result
in electrical shock, fire, serious injury, or death.
Before performing recommended maintenance, be sure the
main power switch to unit is turned off and lockout tag
installed. Electric shock could cause serious injury or death.
C990064
STARTING OR SHUTTING UNITS OFF
1. To start either of these units:
Fig. 1—Unit 50JZ (50Hz)
a. Turn on the electrical power supply to unit.
Step 1—Cooling Mode
b. Select temperature and set SYSTEM switch or MODE
control to desired mode.
With the SYSTEM or MODE control set to COOL, your heat
pump will run in cooling mode until the indoor temperature is
lowered to the level you have selected. On extremely hot days,
your heat pump will run for longer periods at a time and have
shorter “off” periods than on moderate days.
2. To shut this unit off:
NOTE: If the unit is being shut down because of a malfunction,
call your dealer as soon as possible.
a. Set system SWITCH or MODE control to OFF.
Step 2—Heating Mode
b. Turn off the electrical power supply to unit and install
lockout tag.
With the SYSTEM or MODE control of your indoor thermostat set
to HEAT, your heat pump will run in heating mode until room
temperature is raised to the level you have selected. Of course,
your heat pump will run for longer periods to maintain a
comfortable environment on cooler days and nights than on
moderate ones.
OPERATING YOUR HEAT PUMP
The operation of your heat pump system is controlled by the
indoor thermostat. You simply adjust the thermostat and it
maintains the indoor temperature at the level you select. Most
thermostats of heat pump systems have 3 controls: a temperature
control selector, a FAN control, and a SYSTEM or MODE control.
Refer to your thermostat owner’s manual for more information.
Step 3—Supplemental Heat
Your heat pump is your primary heating source. Your system may
also be equipped with a supplemental heating source such as
electric heat. On cold days and nights, your system will automati-
cally turn on the supplemental heat in order to maintain the level
of comfort you have selected.
To better protect your investment and to eliminate unnecessary
service calls, familiarize yourself with the following facts:
1. During heating, increasing the thermostat setting more than
2°F/1.1°C may cause the supplemental heaters to be turned on
for a short period of time to satisfy the thermostat. Needless
use of the supplementary heat reduces potential energy sav-
ings.
When your heat pump needs additional heat to keep you comfort-
able, your Carrier electronic thermostat will turn on the supple-
mental heat (if equipped) and display the “AUX HT” message.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book
Tab 6a 8a
1
4
PC 101
Catalog No. 005–00009
Printed in U.S.A.
Form OM50-C2
Pg 1
2–02
Replaces: New
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1. Inspection and, if required, cleaning of the outdoor and indoor
coils.
Neveroperate your unit without the filter(s) in place. Failure
to heed this warning may result in damage to the blower
motor and/or compressor. An accumulation of dust and lint on
internal parts of your unit can cause loss of efficiency and , in
some cases, a fire.
2. Inspection and, if required, cleaning of the indoor coil drain
pan.
3. Inspection and cleaning of blower wheel housing and motor.
4. Inspection of all supply-air and return-air ducts for leaks,
obstructions, and insulation integrity. Any problems found
should be resolved at this time.
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.
5. Inspection of the unit base to ensure that no cracks, gaps, etc.,
exist which may cause a hazardous condition.
6. Inspection of the unit casing for signs of deterioration.
Indoor and Outdoor Coils
7. Inspection of all electrical wiring and components to assure
proper connection.
Cleaning of the coils should only be done by qualified service
personnel. Contact your dealer for the required annual mainte-
nance.
8. Inspection for leaks in the refrigerant circuit. Pressure-check
to determine appropriate refrigerant charge.
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.
9. Inspection of compressor oil level by service person to ensure
proper oil level is maintained in the compressor when it is
installed and running.
Compressor
10. Operational check of the unit to determine working condi-
tions. Repair or adjustment should be made at this time.
All compressors are factory-shipped with a normal charge of the
correct type refrigeration grade oil. A compressor should rarely
require additional oil.
Your servicing dealer may offer an economical service contract
that covers seasonal inspections. Ask for further details.
Condenser Fan
Complete service instructions can be found in each unit’s Instal-
lation, Start-Up and Service Instructions.
BEFORE YOU CALL FOR SERVICE ...
...check for several easily-solved problems.
If insufficient heating or cooling is suspected:
Do not poke sticks, screwdrivers, or any other objects into
revolving fan blades. Injury or equipment damage may result.
The fan must be kept free of all obstructions to ensure proper
cooling. Contact your dealer for any required service.
( ) Check for sufficient airflow. Check the air filter for dirt. Check
for blocked return-air or supply-air grilles. Be sure they are open
and unobstructed. If these checks do not reveal the cause, call your
servicing dealer.
Electrical Controls and Wiring
Electrical controls are difficult to check without proper instrumen-
tations. If there are any discrepancies in the operating cycle,
contact your dealer and request service.
If your unit is not operating at all, check the following list for
easy solutions:
Refrigerant Circuit
( ) Check to be sure that your thermostat temperature selector is set
below the indoor temperature during the cooling season or above
the indoor temperature during heating season. Be sure the SYS-
TEM switch or MODE control is in the COOL or HEAT position
and not in the OFF position.
The refrigerant circuit is difficult to check for leaks without the
proper equipment. If inadequate cooling is suspected, contact your
local dealer for service.
( ) If your unit still fails to operate, call your servicing dealer for
troubleshooting and repairs. Specify the model and serial numbers
of your unit. (Record them in this manual in the space provided.)
If the dealer knows exactly which unit you have, he may be able
to offer suggestions over the phone, or save valuable time through
knowledgeable preparation for the service call.
System under pressure. Relieve pressure and recover all
refrigerant before system repair or final unit disposal to avoid
serious injury or death. Use all service ports and open all
flow-control devices, including solenoid valves.
Unit Panels
After performing any maintenance or service on either of these
units, be sure all panels are fastened securely in place to prevent
rain from entering unit cabinet and to prevent disruption of the
correct unit airflow pattern.
IN CASE OF TROUBLE
If you perform the steps above and unit performance is still
unsatisfactory, shut off the unit and call your dealer.
REGULAR DEALER MAINTENANCE
Dealer’s Name ______________________________________
Telephone___________________________________________
Unit Model__________________________________________
Unit Serial Number___________________________________
In addition to the type of routine maintenance you might be willing
to perform, your unit should be inspected regularly by a properly
trained service technician. An inspection (preferably each year, but
at least every other year) should include the following:
3
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Copyright 2002 CARRIER Corp. • 7310 W. Morris St. • Indianapolis, IN 46231
om50c2
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book
Tab 6a 8a
1
4
PC 101
Catalog No. 005–00009
Printed in U.S.A.
Form OM50-C2
Pg 4
2–02
Replaces: New
Download from Www.Somanuals.com. All Manuals Search And Download.
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