48A2,A3,A4,A5020-060 Single-Package Rooftop Gas Heating/Electric Cooling Units
with COMFORTLINK™ Controls and Scroll Compressors
User’s Information Manual
NOTE TO INSTALLER
This manual should be left with the equipment owner.
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.
—Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
—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 cannot reach your gas supplier, call the fire department.
—Installation and service must be performed by a qualified installer, service agency or the gas supplier.
WARNING
Improper installation, adjustment, alteration, service 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.
TO LIGHT UNIT
DANGER
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.
If you do not follow these instructions exactly, a fire or explosion may result, causing property damage, injury, or loss of life.
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 scrolling marquee. The scrolling marquee is located in the control box at the compressor end of the unit.
a.Push the ESCAPE key unit a blank display screen is shown.
b.Push the 
key until the SERVICE TEST LED is lit.
c.Push the ENTER key. The display will show STOP.
NOTE: Items in the Configuration and Service Test modes are password protected. The display will flash PASS and WORD when required. Use
the ENTER and arrow keys to enter the 4 digits of the password. The default password is 1111.
d.Push the ENTER key again. The NO/YES display will flash.
WARNING
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.
Your combination heating/cooling unit is equipped with direct spark ignition and induced draft power combustion blower.
WARNING
Burners will light automatically. Do not attempt to light by hand; personal injury may result.
e.Push the 
or 
key to toggle the display to YES and then push ENTER . The unit will be locked off from heating, cooling or any operation. The controls will still function and the display will still operate.
2.Close the field-installed manual gas shutoff valve.
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.
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.
Book |
1 |
Catalog No. 04-53480052-01 |
Printed in U.S.A. |
Form 48A-5SO |
Pg 1 |
3-08 |
Replaces: 48A-3SO |
Tab |
1a |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
GAS HEAT |
GAS VALVE |
SECTION |
(PANEL REMOVED) |
Fig. 1 — Typical Gas Section Location (48A3027 Shown)
Fig. 2 — Typical Gas Valve Location (48A2,A3,A4,A5020-050 Shown)
2
MODE
Run Status
Service Test
Temperature
Pressures
Setpoints
Inputs
Outputs
Configuration
Time Clock
Operating Modes
Alarms
a30-2239ef
Alarm Status
ESCAPE ENTER
STEP 1
STEP 4
STEP 6
a48-930tf
STEP 8
a48-925tf
a48-
STEP 2
STEP 3
a48-3767tf
STEP 5
a48-3768tf
STEP 7
|
MODE |
a30-2239ef |
|
Run Status |
|
|
Service Test |
|
|
Temperature |
|
|
Pressures |
|
|
Setpoints |
|
|
Inputs |
Alarm Status |
|
Outputs |
ESCAPE ENTER |
|
Configuration |
|
|
|
|
a48- |
Time Clock |
|
Operating Modes |
|
|
|
Alarms |
|
STEP 9 |
|
STEP 10 |
Fig. 3 — To Light Unit
3
Loading...