Carrier 50JZ Guide Manual To Operating And Maintaining

50JZ
SingMe-Package EMectric Heat Pump Unit
with Puron® (R-410A) Refrigerant
\isit x__ _.carrier.com
A Guide To Operating and Maintaining Your
SingMe-Package EMectric Heat Pump Unit
HF-JkTUNG& COOLING
NOTE TO INSTALLER
This manual should be left v,ith the equipment owner.
Do not store or use gasoline or other flammable wtpors and
liquids in the vicinity of this or any other appliance. 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 ser'vice technician to inspect the
unit and to replace any part of the control system which has
been under water Failure to _bllow this warning could result
in electrical shock, fire, serious injury, or death.
Befbre performing recommended maintenance, be sure the
main power switch to unit is turned off Electric shock could
cause serious i11iury or death.
TO START
UNIT
1, Turn on the electrical power supply to unit,
2, Select temperature and set SYSTEM switch or MODE control
to desired mode,
TO SHUT UNIT OFF
If" unit is being shut down because of a malfunction, call your
dealer as soon as possible
1. Set system SWITCH or MODE control to OFF.
2. Turn off the electrical power supply to unit.
OPERATING YOUR
NEAT PUMP UNIT
The operation of your heat pump system is controlled by d-m
indoor thermostat You simply adjust d_e thermostat and it
maintains the indoor temperature at the level you select. Most
thermostats for heat pump systems have 3 controls: a temperature
control selector, a FAN control, and a SYSTEM or MODE control
Refer to your daem_ostat owner's manual _br more information.
Step l--Cooling Mode
With the SYSTEM oi" 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 exhemely hot days,
your heat pump will run for longer periods at a time and have
shorter "ofF' periods than on moderate days.
Step 2--Heating Node
With the SYSTEM oi" MODE control ofyonr indoor them_ostat set
to HEAT, your heat pump will run in heating mode until room
temperature is raised to ff*e level you have selected. Of course,
your heat pump will have to operate _br longer periods to maintain
a comfbrtable environment on cooler days and nights than on
moderate ones
Fig. 1--Unit 80JZ
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
electrical heat. On cold days and nights, your system will auto-
matically mm on the supplemental heat in order to maintain the
level of comfort you have selected.
When your heat pump needs additional heat to keep you comt_rt-
able, your Carrier electronic thermostat will mrn on the supple-
mental heat (if equipped) and display the "AUX HT" message.
Step 4--Defrost Mode
When your heat pump is providing heat to your home o1"office and
the outdoor temperature drops below 45 OF, moistme may begin to
fi'eeze on d-_e surface of the coil. If allowed to build up, this ice
would impede airflow across the coil and reduce the amount of
heat absorbed from the outside air. So, to maintain energy-efficient
operation, your heat pump has an automatic defrost mode.
The defiost mode starts at a preset time interval of 30 minutes,
although, it may be reset to 60, 90 or 120 minutes. Defrost will
start at the preset time only if the ice is sufficient to interfere with
nomml heating operation.
After d_e ice is inched fi'om the coil, or afier a maximum of 10
minutes in defrost mode, the unit automatically switches back to
nomml heating operation.
Do not be alarmed if steam or fog appears at the outdoor unit
during defrost mode. Water vapor fiom the melting ice may
condense into a mist in the cold outside air.
During certain weather conditions such as heavy snow and
freezing rain it is not uncommon fbr ice to build up on the unit
grille. This is nomml _br these weather conditions. Do not attempt
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 101 Catalog No 565-070 Printed in U.SA Form OM50-29 Pg 1 8-00 Replaces: New