Bryant Legacy Series, Preferred Series, Legacy 674D, Legacy 677C, Preferred 674D Owner's Information Manual

674D AND 677C
LEGACYt AND PREFERREDt 13 AND 14 SEER
SINGLE--PACKAGED HYBRID HEATr DUAL FUEL SYSTEM
WITH PURON (R--410A) REFRIGERANT SINGLE AND THREE PHASE
2 --5 NOMINAL TONS (SIZES A24--A60)

Owner’s Information Manual

Fig. 1 -- Unit 674D

A09034

Fig. 2 -- Unit 677C

A09042

NOTE TO EQUIPMENT OWNER:

For your convenience, please record the model and serial numbers of your new equipment in the spaces
provided. This information, along with the installation data and dealer contact information, will be helpful
should your system require maintenance or service.

UNIT INFORMATION

Model # _____________________________________

Serial # ______________________________________

ACCESSORIES (List type and model #)

_____________________________________________

_____________________________________________

_____________________________________________

NOTE TO INSTALLER:

This manual must be left with the equipment owner.

INSTALLATION INFORMATION

Date Installed ________________________________

DEALERSHIP CONTACT INFORMATION

Company Name_______________________________

Address______________________________________

_____________________________________________

Phone Number _______________________________

Technician Name _____________________________

_____________________________________________

1

SAFETY CONSIDERATIONS

Installation and servicing of this equipment can be hazardous dueto
mechanical and electrical components. Only trained and qualified
personnel should install, repair, or service this equipment.

Untrained personnel canperformbasicmaintenance functionssuch
as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on this
equipment, observe precautions in the literature, on tags, and on la­bels attached to or shipped with the unit and other safety precautions
that may apply.

Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have fire extinguisher available. Read these in­structions thoroughly and follow all warningsor cautionsincluded
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.

In Canada refer to the current editions of the National Standards of
CanadaCAN/CSA--B149.1 and .2 NaturalGasand Propane Install­ation codes, and Canadian Electrical Code CSA C22.1.

Recognize safety information. This is the safety--alert symbol
Whenyou see this symbol on the unit and in instructionsor 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 injuryor death.CAUTION is used to identify un­safe practices which may resultin minorpersonal injury or product
and property damage.NOTE isused tohighlightsuggestions which

will result in enhanced installation, reliability, or operation.
Note: Installer: This manual should be left withthe equipment user.

!

WARNING

!

CUT HAZARD

Failure to follow this caution may result in personal injury.

When removing access panels or performing maintenance
functions insideyour unit, be awareof 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.

!

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.

!

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury
and/or death.

Before performing recommended maintenance, be sure the
main power switch to unit is turned off and lock--out tag is
installed.

CAUTION

WARNING

WARNING

FIRE,EXPLOSION, ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury,
death or property damage.

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.

!

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.

WARNING

!

FIRE,EXPLOSION, ELECTRICAL SHOCK HAZARD

Failure to follow this hazard warning could result in personal
injury, death and/or property damage.

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.

FIRE, EXPLOSION HAZARD

Failure to follow this warning could resultin personalinjury,
death, and/or property damage.

Do not attempt to light by hand.

WARNING

!

WARNING

2

UNIT INTRODUCTION

The 674D and 674D units are small packaged gas heat/electric heat
pump systems that can utilize both the efficiency of heat pump heat­ing and the comfort of gas heating. The system will optimize for
idealheating, depending on several factors.This unit uses Puron®,
the ozone friendly refrigerant, for cooling and heat pump heating.

Starting or Shutting Off Unit
Note:Your combination heating/cooling unit is equipped with an

automatic direct spark ignition and power combustion blower.

burners do not light within 15 minutes of the initial call for
heat, there is a lockout.

11. Set the temperature selector on room thermostat to desired
setting.

Flue Hood

Burners

Gas Valve

A09043

Fig. 4 -- Gas Heating/Electric Cooling Unit with

Access Panel Removed

Access Panels

A09036

Fig. 3 -- Gas Heating/Electric Cooling Unit Access

Panels

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. 6 while proceeding with
the following steps.

1. Setthetemperatureselector on room thermostat to thelowest
temperature setting and set system switch to Emergency
Heat.

2. Close the external manual gas shutoff valve.

3. Turn off the electrical supply to the unit.

4. Remove the front access panel with a 5/16 --in. nut driver.

5. Move the selectorswitchon the internalgas valve to theOFF
position and wait 5 minutes.

6. Move the selector switch on the internal gas valve to the ON
position.

7. Replace the front access panel.

8. Turn on the electrical supply to unit.

9. Open the external manual gas shutoff valve.

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 willgo
into a Retry Mode after a period of approximately 22
seconds (following the 5--second ignition period). If the

!

FIRE AND EXPLOSION HAZARD

Failure to follow this warning could resultin personalinjury,
death, and/or property damage.

1. If the main burners fail to light, or the blower fails to start,
shutdown gas heatingsection and call your dealerfor 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 shut off unit gas heat:

!

FIRE, EXPLOSION, ELECTRICAL SHOCK
HAZARD

Failure to follow this warning could resultin personalinjury,
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. 7 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 front access panel.

5. Move the selector switchon the internalgas valveto theOFF
position.

6. Replace the front access panel.

3

WARNING

WARNING

To start unit electric cooling:

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.

3. Turn off the electrical power supply to the unit.

4. Remove the front access panel.

5. Move the selectorswitchon the internalgas valve to theOFF
position.

6. Replace the front access panel

7. Restore electrical power to the unit and set system switch to
COOL.

8. Set the temperature selector on room thermostat slightly be­low the room temperature to start unit.

To shut off unit electric cooling:

Refer to Fig. 9 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.

3. Turn off the electrical power supply to the unit.

Note: Heat Pump heating mode procedure is similar to electric
cooling mode except thermostat mode is HEAT and thermostat
must operate on first stage heating above the balance point that
has been determined by the Dealer.

OPERATING YOUR UNIT

The operation of your unit is controlled by the indoor temperature
control (thermostat). You simply adjust the thermostat and it main­tainsthe indoor temperatureat 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 investmentand 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 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 isdesignedto 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!

Step 1—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.

Step 2—Heat Pump Heating Mode

With the SYSTEM or MODE control of your idoor 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 couse, your
system will run for longer periods to maintain a comfortable envi­ronment on cooler days and nights than on moderate ones.

Step 3—Gas Heat Mode

Your heat pump is your primaryheating source. Your system is also
equippedwith a supplemental gas heating source. On cold days and
nights, your system will automatically turn on the suppmental 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.

Step 4—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
heatabsorbed 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 min­utesin defrostmode, the unitautomaticallyswitches 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.

Step 5—Emergency Heat Mode

Ifyou should have problemswiththe heatpump portion of your sys­tem, this modeallowsyour supplemental gas heating source to keep
your home or office warm until your heat pump can be serviced.

MAINTENANCE AND SERVICE

This section discusses maintenance that should be performed on
your system. Mostmaintenance should be performed by your deal­er. You, asthe 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 dealercan help you establish a standard procedure.

For your safety, keep the unit areaclear and free of combustible ma­terials, gasoline, and other flammable liquids and vapors.

To assureproper functioning of the unit,flow of condenserairmust
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. clearance)
(1067mm) and theduct side(12 in. minimum clearance)(305 mm).

Maintenance and Care for the Equipment Owner

Before proceeding with those things you might want to maintain
yourself, please carefully consider the following:

!

FIRE, EXPLOSION, ELECTRICAL SHOCK AND
CUT HAZARD

Failure to follow this warning could result in personal injury,
death or property damage.

1. TURN OFF ELECTRICAL POWER TO YOUR UNIT
BEFORE SERVICING OR PERFORMING
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.

4

WARNING

Air

Filters

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 blowermotor and can causethe 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 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. 5 to access filters installed in the accessory filterrack. 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

Unit Size Filter Size in. (mm)

A24040 20x20x1 (508x508x25)

A24060 and 30 20x24x1 (508x610x25)

A36 --- A42 24x30x1 (610x762x25)

A48 --- A60 24x36x1 (610x914x25)

!

FIRE AND UNIT OPERATION HAZARD

Failure to follow this warning could result in personal injury,
death or 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.

Fans and Fan Motors

Periodically check the condition of fan wheels and housingsand fan
motor shaft bearings. Contact your dealer for the required annual
maintenance.

Indoor and Outdoor

Cleaning of the coils should only be done by qualified service per­sonnel. Contact your dealer for the required annual maintenance.

Condensate

The drain pan and condensate drain line should be checked and
cleaned at the same time thecooling coils are checked by your deal­er.

Compressor

Allcompressors arefactory shippedwith anormalchargeof thecor­rect type and quantity of refrigeration grade oil. A compressor
should rarely require additional oil.

Condenser (Outdoor)

Drain

WARNING

Coils

Fan

Filter Access Panel
For Accessory Filter Rack

Access Panels

A09044

Fig. 5 -- Accessory Filter Rack Access Panel

To replace or inspect filters in accessory filter rack (See Fig. 5):

1. Remove the filter access panel using a 5/16--in. nut driver.

2. Remove the filter(s) by pulling itout 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.

!

PERSONAL INJURY AND UNIT DAMAGE HAZARD

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.

The fan must be kept free of all obstructions to ensure proper cool­ing. Contact your dealer for any required service.

Electrical Controls and W

Electricalcontrolsaredifficultto check without proper instrumenta­tion. If there are any discrepancies in the operating cycle, contact
your local dealer and request service.

Refrigerant

Therefrigerantcircuitis difficultto check for leaks without the prop­er equipment. If inadequate cooling is suspected, contact your local
dealer for service.

Circuit

!

EXPLOSION, BURN 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.

5

WARNING

iring

WARNING

Unit

Panels

Afterperforming any maintenanceor 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 correctunit airflow pat­tern.

Combustion Area and Vent

For properand safeoperation, the furnace needs air for combustion
and ventilation. The air openings, on the furnace, the air openings
to the areain which the furnace is installed, and the spacing around
the furnace must not be blocked or obstructed.

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.

!

FIRE, EXPLOSION HAZARD

Failure to follow this warning could result in personal injury,
death and/or property damage.

If your unit makes an especially loud noise when the main
burners are ignited, shut down the heating section and call
your dealer.

System

WARNING

5. Inspection and, if required, cleaning of the indoor coil con­densate drain pan.

6. Inspection and cleaning of blower wheel housing and motor.

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 theunit baseto ensure that no cracks, gaps, etc.,
exist which may cause a hazardous condition.

9. Inspection of the unit casing for signs of deterioration.

10. Inspection of all electrical wiring and components to assure
proper connection.

11. Inspection for leaks in the refrigerant circuit. Pressure and
temperature check to determine appropriate refrigerant
charge.

12. Operational check of the unit to determine working
conditions.Repairor adjustmentshouldbe madeat thistime.

Your servicing dealer may offeran economical servicecontract that
covers seasonal inspections. Ask for further details.

Completeservice instructions can be found in the unit Installation,
Start--up and Service Instructions.

Warranty Certificate

Your unit has a limited warranty. Be sure to read the warranty care­fully to determine the coverage for your unit.

!

BURN HAZARD

Failure to follow this caution may result in personal injury.

Componentsin heatingsection may be hot after unit has been
started up. When observing flame, be careful not to get close
to or touch heating components.

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:

1. Inspection of all flue product passages--including the burn­ers, heat exchanger, and flue collector box, Mare sure the
burnerflames areblue in color andin proper adjustment.Re­fer to Fig. 10 for burner flame.

2. Inspection of all combustion --and ventilation--air passages
and openings.

3. Close inspectionof all gas pipes leading to and inside of your
unit.

4. Inspection and, if required, cleaning of the outdoor and
indoor coils.

CAUTION

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.

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
SYSTEM switch or MODE control is in the COOL or HEAT and
not OFF.

( ) 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 thespace 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

If you perform thesteps above and unit performance is still unsatis­factory, shut off the unit and call your dealer.

6

55

MAIN

C

L

O

S

E

ON

OFF

STEP 1 STEP 2

STEP 4

STEP 3

STEP 5

STEP 6

MAIN

STEP 8

ON

OFF

O

P

E

N

STEP 9

Fig. 6 -- To Start Unit Gas Heat

STEP 7

72

STEP 10

A07662

7

55

MAIN

C

L

O

S

E

ON

OFF

STEP 1

STEP 4

STEP 2

STEP 3

STEP 5

STEP 6

A07663

Fig. 7 -- To Shut Off Unit Gas Heat

8

90

MAIN

C

L

O

S

E

ON

OFF

STEP 1

STEP 4

STEP 2

STEP 3

STEP 5

MAIN

ON

STEP 6

STEP 8

Fig. 8 -- To Start Unit Electric Cooling

9

OFF

STEP 7

72

A07796

90

MAIN

C

L

O

S

E

ON

OFF

STEP 1

STEP 2

Fig. 9 -- To Shut Off Unit Electric Cooling

BURNER FLAME

BURNER

MANIFOLD

Fig. 10 -- Monoport Burner

STEP 3

A07797

C99021

Heating&CoolingSystems

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.

Copyright 2009 Bryant Heating & Cooling Systems, 7310 W. Morris St. Indianapolis, IN 46231

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Printed in the U.S.A.

10

Edition Date: 03/09

Catalog No:OM674D---677C ---01

Replaces: OM674D --- 01 AND OM677C--- 01