User Information Manual
704B
SINGLE-PACKAGED ELECTRIC COOLING UNIT
WITH PURON® (R-410A) REFRIGERANT
Cancels: New
OM01–61
6–03
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified personnel should install, repair, or service
air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters. All other operations should be performed
by trained service personnel. When working on air-conditioning
equipment, observe precautions in the literature, tags, and labels
attached to the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations.
Recognize safety information. This is the safety-alert symbol
.
When you see this symbol on the product or in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words — DANGER, WARNING, CAU-
TION, and NOTE. Danger identifies the most serious hazards,
which will result in severe personal injury or death. Warning
indicates a condition that could cause serious personal injury or
death. Caution is used to identify unsafe practices, which would
result in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in
enhanced installation, reliability, or operation.
C99064
Fig. 1—Unit 704B
b. Select temperature and set SYSTEM switch or MODE
control to desired mode.
2. To shut unit off:
NOTE: If the unit is being shut down because of a malfunction,
Note to Installer: This manual should be left with the equipment
user.
call your dealer as soon as possible.
a. Set system SWITCH or MODE control to OFF.
b. Turn off the electrical power supply to unit.
WARNING: Do not store or use gasoline or other
flammable vapors and liquids in the vicinity of this or any
other appliance. Failure to follow this warning could
result in fire, serious injury, or death.
OPERATING YOUR PACKAGED COOLING UNIT
The operation of your packaged cooling 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 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.
WARNING: Do not use this unit if any part has been
under water. Immediately call a qualified service techni-
cian 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.
To better protect your investment and to eliminate unnecessary
service calls, familiarize yourself with the following facts:
I. COOLING MODE
With the SYSTEM or MODE 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 system will
run for longer periods at a time and have shorter “off” periods than
on moderate days.
WARNING: Before performing recommended mainte-
nance, be sure the main power switch to unit is turned off.
Electric shock could cause serious injury or death.
II. HEATING MODE (IF INSTALLED WITH OPTIONAL
ELECTRIC HEAT)
Your system may also be equipped with an electric heating source.
On cold days and nights, place your MODE control to HEAT and
your system will automatically turn on the supplemental heat in
order to maintain the level of comfort you have selected.
STARTING OR SHUTTING UNIT OFF
1. To start the unit:
a. Turn on the electrical power supply to unit.
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REFRIGERANT CIRCUIT
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.
The refrigerant circuit is difficult to check for leaks without the
proper equipment. If inadequate cooling is suspected, contact your
local dealer for service.
10. Operational check of the unit to determine working condi-
tions. Repair or adjustment should be made at this time.
WARNING: 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.
Your servicing dealer may offer an economical service contract
that covers seasonal inspections. Ask for further details.
Complete service instructions can be found in the unit Installation,
Start-Up and Service Instructions.
D. Warranty Certificate
Unit 704B has a limited warranty. Be sure to read the warranty
carefully to determine the coverage for your unit.
UNIT PANELS
After performing any maintenance or service on the unit, 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.
E. Before You Call for Service ...
...check for several easily-solved problems.
If insufficient heating or cooling is suspected:
( ) 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.
C. Regular Dealer Maintenance
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:
If your unit is not operating at all, check the following list for
easy solutions:
( ) 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.
1. Inspection and, if required, cleaning of the outdoor and
indoor coils.
2. Inspection and, if required, cleaning of the indoor coil drain
pan.
( ) 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.
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.
5. Inspection of the unit base to ensure that no cracks, gaps,
etc., exist which may cause a hazardous condition.
F. In Case of Trouble
If you perform the steps above and unit performance is still
unsatisfactory, shut off the unit and call your dealer.
6. Inspection of the unit casing for signs of deterioration.
Dealer’s Name ______________________________________
Telephone__________________________________________
Unit Model_________________________________________
Unit Serial Number___________________________________
7. Inspection of all electrical wiring and components to assure
proper connection.
8. Inspection for leaks in the refrigerant circuit. Pressure-
check to determine appropriate refrigerant charge.
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© 2003 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231
Printed in U.S.A.
om0161
Catalog No. 5370–401
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