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48VR: Owners' Information Manual
Fig. 3 – Gas Heating/Electric Cooling Unit with Access Panel
To shut off unit gas heat:
WARNING
!
FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury, death,
and/or property damage.
Do not turn off the electrical power to unit without first turning off the
gas supply.
NOTE: If the unit is being shut down because of a malfunction, call
your dealer as soon as possible.
Should overheating occur or the gas supply fail to shut off, shut off the
external manual gas valve to the unit before shutting off the electrical
supply. 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 and any gas control which has
been under water.
Refer to
Fig. 6
while proceeding with the following steps.
1. Set the temperature selector on room thermostat to lowest
temperature setting and set system SWITCH to OFF.
2. Close the external manual shutoff valve.
3. Turn off the electrical power supply to the unit.
4. Remove the control access panel. (See
5.
Move the selector switch on the internal gas valve to the OFF
position.
6. Replace the control access panel.
To start unit electric cooling:
Refer to
Fig. 5
while proceeding with the following steps.
1. Set the temperature selector on room thermostat to highest
temperature setting and set system SWITCH to OFF.
2. Close the external manual shutoff valve, if not already closed.
3. Turn ON the electrical power supply to the unit.
4. Set system switch to COOL.
5. Set the temperature selector on room thermostat slightly below the
room temperature to start unit.
To shut off unit electric cooling:
Refer to
Fig. 7
while proceeding with the following steps.
1. Set the temperature selector on room thermostat to highest
temperature setting and set system SWITCH to OFF.
2. Close the external manual shutoff valve, if not already closed.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Removed
Fig.
2.)
3. Turn off the electrical power supply to the unit.
NOTE: If the unit is being shut down because of a malfunction, call
your dealer as soon as possible.
The operation of your unit is controlled by the indoor temperature
control (thermostat). You simply adjust the thermostat and it maintains
the indoor temperature at the level you select. Most thermostats of
heating and cooling 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.
To better protect your investment and to eliminate unnecessary service
calls, familiarize yourself with the following facts:
1. During heat pump heating, increasing the thermostat setting more
than 2°F (1.1°C) may cause the supplemental gas heat to be turned
A14490
on for a short period of time to satisfy the thermostat. Needless use
of the supplementary heat reduces potential energy savings.
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!
Cooling Mode
With the SYSTEM control set to COOL, your unit will run in cooling
mode until the indoor temperature is lowered to the level you have
selected. On extremely hot days, your unit will run for longer periods at
a time and have shorter "off" periods than on moderate days.
Heat Pump Heating Mode
With the SYSTEM or MODE control of your indoor thermostat set to
HEAT, your unit will run in heat pump heating mode until room
temperature is raised to the level you have selected. Of course, your
system will run for longer periods to maintain a comfortable
environment on cooler days and nights than on moderate ones.
Gas Heat Mode
Your heat pump is your primary heating source. Your system is also
equipped with a supplemental gas heating source. On cold days and
nights, your system will automatically turn 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 comfortable,
your thermostat will turn on the supplemental gas heat.
Defrost Mode
When your heat pump is providing heat to your home or office and the
outdoor temperature drops below 45°F (7.2°C), moisture may begin to
freeze on the 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 defrost mode starts at a preset time interval of 60 minutes, although,
it may be reset to 30, 90 or 120 minutes. Defrost will start at the preset
time only if the ice is sufficient to interfere with normal heating
operation.
After the ice is melted from the coil, or after a maximum of 10 minutes
in defrost mode, the unit automatically switches back to normal heating
operation.
Do not be alarmed if steam or fog appears at the outdoor unit during
defrost mode. Water vapor from 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 for ice to build up on the unit grille. This is normal
for these weather conditions. Do not attempt to remove the ice from the
unit grille. This condition will not affect the proper function of the unit
and will clear within a few days.
4
Operating Your Unit
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