Carrier 62DC User Manual

62DA,DB,DC,DD07-38  
Vertical or Horizontal  
Dedicated 100% Outdoor Air Unit  
with Optional Gas Heat  
User’s Information Manual  
NOTE TO INSTALLER  
WARNING  
This manual should be left with the equipment owner.  
Burners will light automatically. Do not attempt to light by  
hand; personal injury may result.  
WARNING: If the information in this  
manual is not followed exactly, a fire or  
explosion may result causing property  
damage, personal injury or loss of life.  
TO LIGHT UNIT  
DANGER  
— Do not store or use gasoline or other  
flammable vapors and liquids in the  
vicinity of this or any other appliance.  
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.  
3. Never attempt to manually light the burners on the  
unit with a match, lighter, or any other flame. If the  
electric sparking device fails to light the burners, refer  
to the shutdown procedures, then call your dealer as  
soon as possible.  
— WHAT TO DO IF YOU SMELL GAS  
• Do not try to light any appliance.  
• Do not touch any electrical switch;  
do not use any phone in your  
building.  
• Immediately call your gas supplier  
from a neighbor’s phone. Follow the  
gas supplier’s instructions.  
If you do not follow these instructions exactly, a fire or  
explosion may result, causing property damage, injury, or  
loss of life.  
• If you cannot reach your gas sup-  
plier, call the fire department.  
— Installation and service must be per-  
formed by a qualified installer, service  
agency or the gas supplier.  
See Fig. 1 and 2 for location of gas valve. Refer to Fig. 3  
while performing the following steps.  
1. Disable unit operation by using the BACview controller.  
The BACview controller is shipped in the control box  
and can be mounted on the unit or at a remote location.  
WARNING  
a. On the BACview MAIN screen, press ENTER.  
The LOGIN screen will be shown.  
Improper installation, adjustment, alteration, ser-  
vice or maintenance can cause injury or property  
damage. Refer to this manual. For assistance or  
additional information consult a qualified installer,  
service agency, or the gas supplier.  
b. Enter the PASSWORD (the default admin pass-  
word is 1111) and press OK. The DECR and INCR  
buttons will appear on the bottom of the screen and  
the Shutdown command will flash.  
c. Press the INCR button, then press the OK button.  
The unit will stop immediately. Shutdown [ON]  
will be shown on the main screen.  
2. Close the field-installed manual gas shutoff valve.  
WARNING  
3. Turn off the electrical power to the unit using the optional  
disconnect or the field-installed disconnect and lock off  
using proper lockout and tag-out procedures.  
Before performing recommended maintenance, be sure  
main power switch to unit is turned off and lockout tag is  
installed. Electrical shock could cause personal injury.  
4. Remove the gas section panels.  
5. Move the switch on the gas valve to the OFF position and  
wait 5 minutes.  
Your combination heating/cooling unit is equipped with  
direct spark ignition and induced draft power combustion  
blower.  
NOTE: If this is the first installation of the unit, the gas  
flue hoods must be installed before operating unit. These  
must be installed for the unit to run properly.  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 04-53620003-01 Printed in U.S.A. Form 62D-1SO Pg 1 1-09 Replaces: New  
a48-925tf  
a48-924tf  
STEP 1  
STEP 2  
a62-420  
STEP 3  
a62-425  
ON  
a62-424  
OFF  
STEP 4  
STEP 5  
a62-427  
ON  
a62-426  
OFF  
STEP 6  
STEP 7  
a48-931tf  
a48-930tf  
STEP 8  
STEP 9  
STEP 10  
Fig. 3 — To Light Unit  
3
6. Move the switch on the gas valve to the ON position.  
7. Replace the gas section access panels.  
8. Turn on the electrical supply to the units.  
9. Open the field-installed manual gas valve.  
10. Using the BACview controller, enable the unit to run us-  
ing the following procedure:  
3. Turn off the electrical power to the unit using the optional  
disconnect or the field-installed disconnect and lock off  
using proper lockout and tag-out procedures.  
4. Remove the gas section panels.  
5. Move the switch on the gas valve to the OFF position and  
wait 5 minutes before doing any service in the section or  
on the piping.  
a. On the BACview MAIN screen, press ENTER.  
The LOGIN screen will be shown.  
b. Enter the PASSWORD (the default admin pass-  
word is 1111) and press OK. The DECR and INCR  
buttons will appear on the bottom of the screen and  
the Shutdown command will flash.  
c. Press the DECR button, then press the OK button.  
The unit will start after 10 seconds. Shutdown  
[OFF] will be shown on the main screen.  
6. Replace gas section access panels.  
7. If unit is being shut down because of a malfunction, call  
your dealer as soon as possible.  
If unit is being shut down because the heating season has  
ended, restore electrical power to the unit and reset the  
BACview controller to ensure operation of the cooling  
system during the cooling season.  
IMPORTANT: Should overheating occur or the gas supply  
fail to shut off, shut off the manual gas valve to the unit  
before shutting off the electrical supply.  
11. To test the operation of the gas section, use the BACview  
controller to energize heating to turn on the gas. Refer to  
unit Controls, Start-Up, Operation, Service and Trouble-  
shooting literature for more information.  
Do not use this unit if any part has been under water. Imme-  
diately call a qualified service technician to inspect the unit and  
to replace any part of the control system and gas control that  
has been under water.  
WARNING  
If the main burners fail to light or the blower fails to start,  
shut down gas heating section and call your dealer for ser-  
vice. Failure to follow these requirements could result in  
serious personal injury.  
MAINTAINING YOUR UNIT  
All maintenance should be handled by skilled, experienced  
personnel. Your dealer can help you establish a standard  
procedure.  
For your safety, keep the area around the unit clear and free  
of combustible materials, gasoline, and other flammable  
liquids and vapors.  
To ensure proper functioning of the unit, the flow of com-  
bustion and ventilating air must not be obstructed from reach-  
ing the unit. Clearance of at least 4 ft on flue and condenser  
sides and 6 in. on all other sides is required.  
TO SHUT UNIT OFF  
WARNING  
1. Do not turn off the electrical power to unit without  
first turning off the gas supply.  
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. Call your  
dealer as soon as possible.  
ROUTINE MAINTENANCE AND CARE  
FOR THE EQUIPMENT OWNER  
Consider the following information before maintaining or  
servicing equipment:  
Failure to follow these procedures can result in serious  
fire or personal injury.  
WARNING  
Refer to Fig. 4 while performing the following steps:  
1. TURN OFF GAS SUPPLY AND THEN ELECTRI-  
CAL POWER TO YOUR UNIT BEFORE SERVIC-  
ING OR PERFORMING MAINTENANCE.  
2. Do not turn off electrical power to this unit without  
first turning off the gas supply.  
3. When removing access panels or performing mainte-  
nance functions inside your unit, be aware of sharp  
sheet metal parts and screws. Although special care  
has been taken to reduce sharp edges inside the unit,  
be extremely careful when handling parts or reaching  
into the unit.  
1. Disable unit operation by using the BACview controller.  
The BACview controller is shipped in the control box  
and can be mounted on the unit or at a remote location.  
a. On the BACview MAIN screen, press ENTER.  
The LOGIN screen will be shown.  
b. Enter the PASSWORD (the default admin pass-  
word is 1111) and press OK. The DECR and INCR  
buttons will appear on the bottom of the screen and  
the Shutdown command will flash.  
c. Press the INCR button, then press the OK button.  
The unit will stop immediately. Shutdown [ON]  
will be shown on the main screen.  
Failure to follow these procedures can result in serious  
fire or personal injury.  
2. Close the field-installed manual gas shutoff valve.  
4
a48-925tf  
a48-924tf  
STEP 1  
STEP 2  
STEP 3  
ON  
OFF  
STEP 5  
STEP 6  
STEP 4  
Fig. 4 — To Shut Unit Off  
Air Filter(s) — Air filter(s) should be checked monthly  
and changed when necessary. Units may have either 2-in. or  
4-in. thick filters. For units with 2-in. thick filters, all filters will  
be 20 x 24 x 2-in. size. For units with 4-in. thick filters, filters  
may be 20 x 24 x 4-in. size or 20 x 20 x 4-in. size. The filter ac-  
cess panel is located at the end of the unit opposite of the con-  
denser section. The access door is labeled to indicate that it is  
the filter access door. Units with energy conservation wheel  
will have additional filters which must also be replaced.  
WARNING  
Never operate your unit without filters in place. Failure to  
heed this warning may result in damage to the blower  
motor and/or compressor. An accumulation of dust and lint  
on internal parts of your unit can cause loss of efficiency  
and, in some cases, fire.  
To replace or inspect filters:  
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 attempt-  
ed by anyone not having the required expertise and equipment  
to do the job properly. Checking and/or cleaning the heat  
exchanger involves removing the gas controls assembly, the  
flue collector box, and the flue collector box cover. When  
finished, the gas controls assembly must be reinstalled for  
proper operation. Also, the flue collector box cover must be  
replaced correctly so that a proper seal is maintained. Refer to  
unit installation instructions for correct procedure. Contact  
your dealer for the required periodic maintenance.  
1. Loosen the 3 latches securing the filter access door (and  
optional energy conservation wheel section door if in-  
stalled) and open door. See Fig. 1.  
2. Remove filters by pulling filter out toward you and away  
from the filter track.  
3. Inspect or replace filters.  
4. Return filters to filter tracks. Note direction of airflow  
arrows on filter frame.  
5. Close filter access panel and tighten latches.  
If you have difficulty in locating your air filter or if you  
have questions concerning proper filter maintenance, contact  
your dealer for instructions. When replacing your unit filters,  
always use the same size and type of filter that was originally  
supplied by the installer.  
Fans and Belts — Periodically check the condition of  
the fan wheels and housings, and belt tension. When service is  
necessary, call your dealer.  
5
5. When you have completed your inspection, follow the To  
Light Unit section in this manual to restore your unit to  
operation.  
6. Observe unit heating operation. Watch the burner flame  
to see if it is bright blue. If you observe a suspected mal-  
function or if the flame is not bright blue, call your dealer.  
Indoor-Fan Motor, Outdoor-Fan Motor, and  
Combustion Fan Motor — Lubrication is not recom-  
mended. Bearings will not require lubrication for at least  
5 years of normal operation. After 5 years, motor life can be  
extended by having the motors serviced at an authorized motor  
service shop.  
Fan Shaft Bearings — The bearings should be greased  
with Shell Alvania no. 2 grease or equivalent. The bearings  
will need to be greased annually, dependent on fan usage. Do  
not grease more than once a year.  
WARNING  
Components in heat section may be hot after unit has been  
started. When observing flame, be careful not to get close  
to or touch heating components. Serious personal injury  
may result.  
Evaporator and Condenser Coils — Cleaning of  
the coils should be done by qualified service personnel.  
Contact your dealer for the required annual maintenance.  
7. Replace gas section access panels.  
Condensate Drain — The drain pan and condensate  
drain line should be checked and cleaned at the same time the  
cooling coils are checked by your dealer.  
Unit Panels — After performing any maintenance or  
service on the unit, be sure all panels are securely fastened in  
place to prevent rain from entering unit cabinet and to prevent  
disruption of the correct unit airflow pattern.  
Compressor — All compressors are factory supplied with  
a normal charge of the correct type of refrigeration-grade oil in  
them and should not require additional oil.  
REGULAR DEALER MAINTENANCE  
Condenser Fan  
WARNING  
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:  
Do not poke sticks, screwdrivers, or any other object into  
revolving fan blades. Severe bodily injury may result.  
1. Inspection of all flue product passages — including the  
burners, heat exchanger, and flue collector box.  
2. Inspection of all combustion and ventilation-air passages  
and openings.  
3. Close inspection of all gas pipes leading to and inside  
your unit.  
4. Inspection and if required, cleaning of the condenser and  
evaporator coils.  
5. Inspection and if required, cleaning of the condensate  
drain pan.  
6. Inspection and cleaning of blower wheel housing and  
motor.  
7. Inspection of all supply and return-air ducts for leaks, ob-  
structions, and insulation integrity. Any problems found  
should be resolved at the time of inspection.  
8. Inspection of the unit base for cracks, gaps, etc., which  
may cause a hazardous condition.  
The fan must be kept free of all obstructions to ensure prop-  
er cooling. Contact your dealer for any required service.  
Electrical Controls and Wiring Electrical con-  
trols are difficult to check without proper instrumentation. If  
there are any discrepancies in the operating cycle, contact your  
dealer and request service.  
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.  
Combustion Area and Vent System — The com-  
bustion area and vent system should be visually inspected be-  
fore each heating season. The normal accumulation of dirt,  
soot, rust, and scale can result in loss of efficiency and im-  
proper performance if allowed to build up.  
CAUTION  
9. Inspection of the unit casing for signs of deterioration.  
If your unit makes any unusual or especially loud noises  
during heating, shut down the heating section and call your  
dealer.  
10. Inspection of all electrical wiring and components to  
ensure proper connection.  
11. Inspection for leaks in the refrigerant circuit. Pressure-  
check to determine appropriate refrigerant charge.  
12. Inspection of fan wheels and housings, belt tension, and  
fan motor shaft bearings.  
See Fig. 1 and 2 and proceed as follows to inspect the com-  
bustion area and power-venting system of your unit.  
1. Turn off gas supply to your unit.  
2. Turn off electrical power to your unit.  
3. Remove gas section access panels.  
4. Using a flashlight, carefully inspect the burner areas for  
dirt, soot, rust, or scale.  
13. Operational check of the unit to determine working  
conditions. Repair or adjustment should be made at the  
time of inspection.  
Your servicing dealer may offer an economical service con-  
tract that covers seasonal inspections. Ask for further details.  
Complete service instructions can be found in the unit  
Controls, Start-Up, Operation, Service and Troubleshooting  
literature.  
CAUTION  
If dirt, soot, rust, or scale accumulations are found, call  
your dealer and do not operate your heating section.  
6
NOTE: Before proceeding with the next check, turn OFF the  
electrical power supply to the unit. Remove the gas section  
access panels.  
BEFORE YOU CALL FOR SERVICE,  
CHECK FOR PROBLEMS  
THAT CAN BE EASILY SOLVED  
(
) During the heating season, check the switch on the gas  
If insufficient heating or cooling is suspected:  
valve. Is it in the ON position? If it is not, be sure it has not  
been turned off for the purpose of safety. If no safety hazards  
are present, follow the start-up procedures in this manual.  
(
) Check for sufficient airflow. Check the air filter for dirt.  
Check for blocked return 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 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.  
If your unit is not operating at all, check the following list  
for easy solutions:  
(
) Check BACview display to be sure unit has not been dis-  
abled. Check set points are properly set.  
) Is the electrical supply switch ON? Are any fuses blown  
or has the circuit breaker tripped?  
) During the heating season, check the external manual  
shutoff valve. Is this lever parallel with the pipe, indicating that  
the valve is open? Or is the lever at the right angle, indicating  
that the valve is closed? If closed, has the gas been shut off for  
safety reasons? Otherwise, you may open the valve and follow  
the start-up procedures listed in this manual.  
(
IN CASE OF TROUBLE  
(
If, after performing the above checks, unit performance is  
unsatisfactory, shut off the unit and call your dealer.  
Dealer’s Name _____________________________________  
Telephone No. _____________________________________  
Unit Model _______________________________________  
Unit Serial Number _________________________________  
7
Copyright 2009 Carrier Corporation  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 04-53620003-01  
Printed in U.S.A.  
Form 62D-1SO  
Pg 8  
1-09  
Replaces: New  

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