Bryant LEGACY 574D User Manual

574D- -A AND 577C- -A  
LEGACYt AND PREFERREDt 13 AND 14 SEER  
SINGLE-PACKAGED AIR CONDITIONER AND GAS FURNACE SYSTEM  
WITH PURON (R-410A) REFRIGERANT SINGLE AND THREE PHASE  
2-5 NOMINAL TONS (SIZES 24-60)  
Owner’s Information Manual  
A09033  
A09034  
577C--A Without Economizer  
574D----A Without Economizer  
A10078  
A10077  
577C--A With Economizer  
Fig. 2 -- Unit 577C--A  
574D----A With Economizer  
Fig. 1 -- Unit 574D--A  
1
SAFETY CONSIDERATIONS  
!
WARNING  
Improper installation, adjustment, alteration, service maintenance,  
or use can cause explosion, fire, electrical shock, or other  
conditions which may cause death, personal injury, or property  
damage. Consult a qualified installer, service agency, or your  
distributor or branch for information or assistance. The qualified  
installer or agency must use factory--authorized kits or accessories  
when modifying this product. Refer to the individual instructions  
packaged with the kits or accessories when installing.  
FIRE AND EXPLOSION HAZARD  
What to do if you smell gas:  
1. Do not try to light any appliance.  
2. Do not touch any electrical switch; do not use any phone  
in your building.  
3. Leave the building immediately.  
4. Immediately call your gas supplier from a nearby phone.  
Follow the gas supplier’s instructions.  
5. If you cannot reach your gas supplier, call the fire  
department.  
Follow all safety codes. Wear safety glasses, protective clothing,  
and work gloves. Have a fire extinguisher available. Read these  
instructions thoroughly and follow all warnings or cautions  
included in literature and attached to the unit. consult local  
building codes, the current editions of the National Fuel Gas Code  
(NFGC) NFPA 54/ANSI Z223.1, and the National Electrical Code  
(NEC) NFPA 70.  
!
WARNING  
In Canada refer to the current editions of the National Standards of  
Canada CAN/CSA--B149.1 and .2 Natural Gas and Propane  
Installation codes, and Canadian Electrical Code CSA C22.1  
ELECTRICAL SHOCK HAZARD  
Failure to follow this warning could result in personal  
injury and/or death.  
Recognize safety information. This is the safety--alert symbol  
.
Before performing recommended maintenance, be sure the  
main power switch to unit is turned off and lock--out tag is  
installed.  
When you see this symbol on the unit and in instructions or  
manuals, be alert to the potential for personal injury. Understand  
these signal words: DANGER, WARNING, and CAUTION. These  
words are used with the safety--alert symbol. DANGER identifies  
the most serious hazards which will result in severe personal injury  
or death. WARNING signifies hazards which could result in  
personal injury or death. CAUTION is used to identify unsafe  
practices which may 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.  
!
WARNING  
FIRE,  
EXPLOSION,  
HAZARD  
ELECTRICAL  
SHOCK  
Failure to follow this warning could result in personal  
injury, death and/or property damage.  
NOTE: Installer: This manual should be left with the equipment  
user.  
1. Do not turn off the electrical power to unit without first  
turning off the gas supply.  
2. Before attempting to start the gas heating section,  
familiarize yourself with all the procedures that must be  
followed.  
!
WARNING  
FIRE,  
EXPLOSION,  
ELECTRICAL  
SHOCK  
HAZARD  
Failure to follow this warning could result in personal  
injury, death or property damage.  
WARNING  
FIRE, EXPLOSION HAZARD  
!
Installation and servicing of this equipment can be  
hazardous due to mechanical and electrical components.  
Only trained and qualified personnel should install, repair,  
or service this equipment.  
Failure to follow this warning could result in personal  
injury, death, and/or property damage.  
Do not attempt to light by hand.  
WARNING  
FIRE, EXPLOSION HAZARD  
!
!
CAUTION  
Failure to follow this warning could result in personal  
injury, death, and/or property damage.  
CUT HAZARD  
Failure to follow this caution may result in personal injury.  
Do not store or use combustible materials, gasoline, or other  
flammable vapors and liquids in the vicinity of this or any  
other appliance.  
When removing access panels or performing maintenance  
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.  
!
WARNING  
FIRE,  
EXPLOSION,  
ELECTRICAL  
SHOCK  
HAZARD  
Failure to follow this warning could result in personal  
injury, death or property damage.  
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.  
3
UNIT INTRODUCTION  
WARNING  
!
These units are small packaged gas heat/electric cooling system  
that can utilize the comfort of gas heating packaged along with  
efficient electric air conditioning. This unit uses Puronr, the  
ozone friendly refrigerant for cooling.  
FIRE AND EXPLOSION HAZARD  
Failure to follow this warning could result in personal  
injury, death, and/or property damage.  
Starting or Shutting Off Unit  
NOTE: Your combination heating/cooling unit is equipped with  
an automatic direct spark ignition and power combustion blower.  
1. If the main burners fail to light, or the blower fails to  
start, shut down gas heating section and call your dealer for  
service.  
2. Never attempt to manually light the main burners on unit  
with a match, lighter, or any other flame. If the electric  
sparking device fails to light the main burners, refer to the  
following shutdown procedures, then call your dealer as  
soon as possible.  
To start unit gas heat:  
Refer to Fig. 3 for location of unit front access panel. Refer to Fig.  
4 for location of gas valve. Refer to Fig. 5 while proceeding with  
the following steps.  
1. Set the temperature selector on room thermostat to the low-  
est temperature setting and set system switch to HEAT.  
To shut off unit gas heat:  
2. Close the external manual gas shutoff valve.  
3. Turn off the electrical supply to the unit.  
4. Remove the control access panel with a 5/16--in. nut driver.  
(See Fig. 3.)  
WARNING  
!
FIRE,  
HAZARD  
EXPLOSION,  
ELECTRICAL  
SHOCK  
5. Move the selector switch on the internal gas valve to the  
OFF position and wait 5 minutes.  
Failure to follow this warning could result in personal  
injury, death, and/or property damage.  
6. Move the selector switch on the internal gas valve to the ON  
position.  
Do not turn off the electrical power to unit without first  
turning off the gas supply.  
7. Replace the control access panel.  
8. Turn on the electrical supply to unit.  
9. Open the external manual gas shutoff valve.  
NOTE: If the unit is being shut down because of a malfunction,  
call your dealer as soon as possible.  
10. Set the temperature selector on room thermostat slightly  
above room temperature to start unit. The induced--draft  
combustion air fan will start. Main gas valve will open and  
main burners should ignite within 5 seconds. If the burner  
does not light within 5 seconds, the ignition module will go  
into a Retry Mode after a period of approximately 22  
seconds (following the 5--second ignition period). If the  
burners do not light within 15 minutes of the initial call for  
heat, there is a lockout.  
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.  
11. Set the temperature selector on room thermostat to desired  
setting.  
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 Fig. 3.)  
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. 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.  
3. Turn ON the electrical power supply to the unit.  
4. Set system switch to COOL.  
Control  
Access  
Panel  
Blower  
Access  
Panel  
Filter Access Panel  
For Accessory Filter Rack  
Compressor  
Access  
Panel  
5. Set the temperature selector on room thermostat slightly  
below the room temperature to start unit.  
A09213  
To shut off unit electric cooling:  
Fig. 3 -- Accessory Filter Rack Access Panel  
Refer to Fig. 8 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 off the electrical power supply to the unit.  
4
Air Filters  
OPERATING YOUR UNIT  
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 air filters in place before it can be operated.  
These filters can be located in one of at least 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.  
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:  
Cooling Mode  
The other typical application is an accessory filter rack installed  
inside the unit itself. The following information is given to assist in  
changing filters used in these internal filter racks.  
Table 1 indicates the correct indoor filter size for your unit. Refer  
to Fig. 3 to access filters installed in the accessory filter rack. If  
using an Accessory Filter Rack, refer to the Installation Instructions  
provided with it for correct filter sizes and quantities.  
Table 1 – Indoor Air Filter Data  
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.  
Gas Heat Mode  
With the SYSTEM or MODE control of your indoor thermostat set  
to HEAT, your unit will run in heating mode until room  
temperature is raised to the level you have selected. On cold days  
and nights, your system will typically run for longer periods of  
time and have shorter “off” periods than on moderate days.  
Unit Size  
A24040  
Filter Size  
20x20x1 (508x508x25 mm)  
20x24x1 (508x610x25 mm)  
24x30x1 (610x762x25 mm)  
24x36x1 (610x914x25 mm)  
A24060, 30  
A36 --- A42  
A48 --- A60  
MAINTENANCE AND SERVICE  
This section discusses maintenance that should be performed on  
your system. Most maintenance should be performed by your  
dealer. You, as the owner, may wish to handle some minor  
maintenance 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.  
For your safety, keep the unit area clear and free of combustible  
materials, gasoline, and other flammable liquids and vapors.  
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) and the duct side (12 in. (305 mm)  
minimum clearance). Also, ensure that the return--air duct  
connection (s) is physically sound, is sealed to the furnace casing,  
and terminates outside the space containing the furnace.  
Flue Hood  
Burners  
Gas Valve  
A09043  
Maintenance and Care for the Equipment Owner  
Fig. 4 -- Gas Heating/Electric Cooling Unit with Access Panel  
Removed  
Before performing equipment maintenance  
carefully consider the following:  
yourself, please  
To replace or inspect filters in accessory filter rack (See Fig. 3):  
1. Remove the filter access panel using a 5/16--in. nut driver.  
2. Remove the filter(s) by pulling it out of the unit. If the  
filter(s) is dirty, clean or replace with a new one.  
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.  
!
WARNING  
FIRE, EXPLOSION, ELECTRICAL SHOCK AND  
CUT HAZARD  
Failure to follow this warning could result in personal  
injury, death or property damage.  
1. Turn off gas supply first, then all electrical power to your  
unit and install lock--out tag before servicing or per-  
forming maintenance.  
2. When removing access panels or performing  
maintenance 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. Wear safety glasses, gloves, and appropriate  
protective clothing.  
!
CAUTION  
UNIT OPERATION HAZARD  
Failure to follow this caution may result in 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 and blower motor and/or  
compressor damage.  
5
Replacing or inspecting filters in units with econom-  
izers  
Small Chassis (See Fig. 5)  
!
CAUTION  
UNIT OPERATION HAZARD  
1. Remove return air duct cover at rear of unit using a 5/16--in.  
nut driver.  
Failure to follow this caution may result in property  
damage.  
2. Remove the filter(s) by pulling it out and through the unit  
duct opening. If filter is dirty, replace both filters with new  
ones.  
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 and blower motor and/or  
compressor damage.  
When installing the new filters, note the direction of the airflow  
arrows on the filter frame, which should be pointing at the indoor  
coil.  
3. Reinstall duct cover ensuring opening is air and watertight.  
Table 2 – Indoor Air Filter Data with Economizer  
Unit Size  
Filter Size  
2 each 20 x 12 x 1  
30-040/060  
(508 x 305 x 25 mm)  
2 each 20 x 12 x 1  
36-060/090  
42-060/090  
(508 x 305 x 25 mm)  
1 each 24 x 14 x 1 (610 x 356 x 25 mm),  
24 x 16 x 1 (610 x 406 x 25 mm)  
1 each 24 x 14 x 1 (610 x 356 x 25 mm),  
24 x 16 x 1 (610 x 406 x 25 mm)  
1 each 24 x 16 x 1 (610 x 406 x 25 mm),  
24 x 18 x 1 (610 x 457 x 25 mm)  
48-090/115/130  
60-090/115/130*  
FILTER  
ACCESS  
PANEL  
*Units with bent indoor coil.  
LARGE CHASSIS  
A10062  
Fig. 6 -- Large Chassis Filter Access  
Fans and Fan Motors  
Periodically check the condition of fan wheels and housings and  
fan motor shaft bearings. Contact your dealer for the required  
annual maintenance.  
Heat Exchanger  
To ensure dependable and efficient heating operation, the heat  
exchanger should be checked by a qualified maintenance person  
before each heating season, and cleaned when necessary. This  
checkout should not be attempted by anyone not having the  
required expertise and equipment to properly do the job. Contact  
your dealer for the required periodic maintenance.  
RETURN  
DUCT COVER  
(Remove for  
filter access)  
Indoor and Outdoor Coils  
SMALL CHASSIS  
Cleaning of the coils should only be done by qualified service  
personnel. Contact your dealer for the required annual  
maintenance.  
A10063  
Fig. 5 -- Small Chassis Filter Access  
Large Chassis (See Fig. 6)  
Condensate Drain  
1. Remove filter access door using a 5/16--in. nut driver.  
The drain pan and condensate drain line should be checked and  
cleaned at the same time the cooling coils are checked by your  
dealer.  
2. Remove the filter(s) by pulling it out and through the unit  
filter access door. If filter is dirty, replace both filters with  
new ones.  
Compressor  
Units with bent indoor coils, install 24 x 18 x 1 (610 x 457 x 25  
mm) filter first and then install 24 x 16 x 1 (610 x 406 x 25) filter.  
All compressors are factory shipped with a normal charge of the  
correct type of refrigeration grade oil. A compressor should rarely  
require additional oil.  
When installing the new filters, note the direction of the airflow  
arrows on the filter frame, which should be pointing at the indoor  
coil.  
3. Reinstall filter access door ensuring opening is air and water  
tight.  
6
Condenser (Outdoor) Fan  
Combustion Area and Vent System  
For proper and safe operation, the furnace needs air for combustion  
and ventilation. The air openings, on the furnace, the air openings  
to the area in which the furnace is installed, and the spacing around  
the furnace must not be blocked or obstructed.  
WARNING  
!
PERSONAL INJURY AND UNIT DAMAGE  
HAZARD  
The combustion area and vent system should be inspected visually  
before each heating season. The normal accumulation of dirt, soot,  
rust, and scale can result in loss of efficiency and improper  
performance if allowed to build up. This inspection should be done  
by a trained service person.  
Failure to follow this warning could result in personal  
injury, death or property damage.  
Do not insert sticks, screwdrivers, or any other objects into  
revolving fan blades.  
!
WARNING  
The fan must be kept free of all obstructions to ensure proper  
cooling. Contact your dealer for any required service.  
FIRE, EXPLOSION HAZARD  
Failure to follow this warning could result in personal  
injury, death and/or property damage.  
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.  
If your unit makes an especially loud noise when the main  
burners are ignited, shut down the heating section and call  
your dealer.  
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.  
!
CAUTION  
BURN HAZARD  
!
WARNING  
Failure to follow this caution may result in personal injury.  
Components in heating section may be hot after unit has  
been started up. When observing flame, be careful not to get  
close to or touch heating components.  
EXPLOSION AND ENVIRONMENTAL HAZARD  
Failure to follow this warning could result in personal  
injury, death or property damage.  
System under pressure. Relieve pressure and recover all  
refrigerant before system repair or final unit disposal. Use  
all service ports and open all flow--control devices,  
including solenoid valves.  
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:  
Unit Panels  
1. Inspection of all flue product passages--including the burn-  
ers, heat exchanger, and flue collector box, Mare sure the  
burner flames are blue in color and in proper adjustment.  
Refer to Fig. 9 for burner flame.  
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.  
2. Inspection of all combustion--and ventilation--air passages  
and openings.  
3. Close inspection of all gas pipes leading to and inside of  
your unit.  
4. Inspection and, if required, cleaning of the outdoor and  
indoor coils.  
5. Inspection and, if required, cleaning of the indoor coil con-  
densate drain pan.  
7
MAIN  
ON  
55  
OFF  
STEP 1  
STEP 2  
STEP 3  
STEP 5  
STEP 4  
STEP 6  
STEP 7  
MAIN  
ON  
72  
OFF  
STEP 8  
STEP 9  
STEP 10  
A07662  
Fig. 7 -- To Start Unit Gas Heat  
8
MAIN  
ON  
55  
OFF  
STEP 1  
STEP 2  
STEP 3  
STEP 4  
STEP 5  
STEP 6  
A07663  
Fig. 8 -- To Shut--off Unit Gas Heat  
MAIN  
ON  
72  
90  
OFF  
STEP 4 & 5  
STEP 2  
STEP 1  
STEP 3  
A09194  
Fig. 9 -- To Start Unit Electric Cooling  
9
MAIN  
ON  
90  
OFF  
STEP 1  
STEP 2  
STEP 3  
A07797  
Fig. 10 -- To Shut--off Unit Electric Cooling  
BURNER FLAME  
Warranty Certificate  
Your unit has a limited warranty. Be sure to read the warranty  
carefully to determine the coverage for your unit.  
BURNER  
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.  
MANIFOLD  
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  
C99021  
set below the indoor temperature during the cooling season or  
above the indoor temperature during heating season. Be sure the  
SYSTEM switch or MODE control is in the COOL or HEAT  
position and not in the OFF position.  
Fig. 11 -- Monoport Burner  
6. Inspection and cleaning of blower wheel housing and  
motor.  
(
) If your unit still fails to operate, call your servicing dealer for  
7. Inspection of all supply--air and return--air ducts for leaks,  
obstructions, and insulation integrity. Any problems found  
should be resolved at this time.  
8. Inspection of the unit base to ensure that no cracks, gaps,  
etc., exist which may cause a hazardous condition.  
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.  
In Case of Trouble  
9. Inspection of the unit casing for signs of deterioration.  
If you perform the steps above and unit performance is still  
unsatisfactory, shut off the unit and call your dealer.  
10. Inspection of all electrical wiring and components to assure  
proper connection.  
11. Inspection for leaks in the refrigerant circuit. Pressure  
check to determine appropriate refrigerant charge.  
12. Operational check of the unit to determine working  
conditions. Repair or adjustment should be made at this  
time.  
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.  
Heating & Cooling Systems  
TO OBTAIN INFORMATION ON PARTS: Consult your installing dealer or classified section of your local telephone directory under the  
“Heating Equipment” or Air Conditioning Contractors & Systems” heading for dealer listing by brand name.  
Have available the Model No., Series Letter, & Serial No. of your equipment to ensure correct replacement part.  
Edition Date: 04/10  
Catalog No: OM574D---577C---03  
Copyright 2010 Bryant Heating & Cooling Systems, 7310 W. Morris St. Indianapolis, IN 46231  
Replaces: OM574D---577C---02  
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.  
10  

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