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INTRODUCTION

I. SPECIFICATIONS

TABLE OF CONTENTS

!

WARNING

Page No.

I. SPECIFICATIONS

Components

2

Unit Dimensions

3-5

Electrical & Physical Data

6-10

II. INSTALLATION

General

11

Location Considerations

11

Exhaust & Combustion

Hoods

12

Cover Panel Installation

12

Clearances

13

Rooftop

14

Ducting

14-15

Return Air

15

III. GAS SUPPLY & PIPING

16-18

IV. ELECTRICAL WIRING

Power Supply

19

Hook-up

20

Internal Wiring

20

Thermostat

20

V. FURNACE CONTROLS

21-23

VI. OPERATION INFO

23-24

VII. AIRFLOW

25-26

VIII. TROUBLESHOOTING

27-29

IX. WIRING DIAGRAMS

30-33

X. CHARGE CHARTS

34-36

XI. WARRANTY

40

THE MANUFACTURER’S WARRANTY
DOES NOT COVER ANY DAMAGE OR
DEFECT TO THE AIR CONDITIONER
CAUSED BY THE ATTACHMENT OR
USE OF ANY COMPONENTS,
ACCESSORIES OR DEVICES (OTHER
THAN THOSE AUTHORIZED BY THE
MANUFACTURER) INTO, ONTO OR IN
CONJUNCTION WITH THE AIR
CONDITIONER. YOU SHOULD BE
AWARE THAT THE USE OF
UNAUTHORIZED COMPONENTS,
ACCESSORIES OR DEVICES MAY
ADVERSELY AFFECT THE
OPERATION OF THE AIR
CONDITIONER AND MAY ALSO
ENDANGER LIFE AND PROPERTY.
THE MANUFACTURER DISCLAIMS
ANY RESPONSIBILITY FOR SUCH
LOSS OR INJURY RESULTING FROM
THE USE OF SUCH UNAUTHORIZED
COMPONENTS, ACCESSORIES OR
DEVICES.

This booklet contains the installation and
operating instructions for your
combination gas heating/electric cooling
unit. There are some precautions that
should be taken to derive maximum
satisfaction from it. Improper installation
can result in unsatisfactory operation or
dangerous conditions.

Read this booklet and any instructions
packaged with separate equipment
required to make up the system prior to
installation. Give this booklet to the
owner and explain its provisions. The
owner should retain this booklet for
future reference.

CHECKING PRODUCT

RECEIVED

Upon receiving the unit, inspect it for any
damage from shipment. Claims for
damage, either shipping or concealed,
should be filed immediately with the
shipping company. 

IMPORTANT: 

Check

the unit model number, heating size,
electrical characteristics, and
accessories to determine if they are
correct.

A. GENERAL

The Combination Gas Heating/Electric
Cooling Rooftop is available in 250,000
AND 350,000 BTUH heating input with
nominal cooling capacity of 15 tons.
300,000 and 400,000 BTUH heating inputs
are available in nominal cooling capacity of
20 & 25 tons. Units are convertible from
bottom supply and return to side supply
and return by relocation of supply and
return air cover panels. See cover
installation detail and Figures 10 &11.

The units are weatherized for mounting
outside of the building.

UNITS ARE NOT DESIGN CERTIFIED TO
BE INSTALLED INSIDE THE
STRUCTURE. DOING SO CAN CAUSE
INADEQUATE UNIT PERFORMANCE AS
WELL AS PROPERTY DAMAGE AND
CARBON MONOXIDE POISONING
RESULTING IN PERSONAL INJURY OR
DEATH.

B. MAJOR COMPONENTS

The unit includes a hermetically-sealed
refrigerating system consisting of a scroll
compressor, condenser coil, evaporator
coil with capillary tube assembly or TXV, a
circulation air blower, a condenser fan, a
heat exchanger assembly, gas burner and
control assembly, combustion air motors
and fan, and all necessary internal
electrical wiring. The cooling system of
these units is factory-evacuated, charged
and performance tested. Refrigerant
amount and type are indicated on rating
plate.

!

WARNING

Summary of Contents for A180CL25E

Page 1: ...y 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 Do not return to your home until authorized by the gas supplier or fire department DO NOT RELY ON SMELLALONE TO DETECT LEAKS DUE TO VARIOUS FACTORS YOU MAY NOT BE ABLE TO SMELL FUEL GASES U L recognized fuel gas an...

Page 2: ...arate equipment required to make up the system prior to installation Give this booklet to the owner and explain its provisions The owner should retain this booklet for future reference CHECKING PRODUCT RECEIVED Upon receiving the unit inspect it for any damage from shipment Claims for damage either shipping or concealed should be filed immediately with the shipping company IMPORTANT Check the unit...

Page 3: ...URN DIMENSIONS FOR DOWNFLOW APPLICATIONS Unit Dimensions FOR CLEARANCES SEE PAGE 12 FIGURE 12 IMPORTANT THIS UNIT MUST BE MOUNTED LEVEL IN BOTH DIRECTIONS TO ALLOW WATER TO DRAIN FROM THE CONDENSER SECTION AND CONDENSATE PAN ST A0886 02 ST A0886 07 ...

Page 4: ...FIGURE 3 COMPONENT LOCATIONS DIMENSIONS ST A0886 04 FIGURE 4 COMPONENT LOCATIONS DIMENSIONS ST A0886 06 FIGURE 5 COMPONENT LOCATIONS ST A0886 27 4 GAS SUPPLY SIDE ENTRY 3 4 INLET ...

Page 5: ...5 FIGURE 7 COMPONENT ACCESS LOCATIONS DIMENSIONS FIGURE 6 DIMENSIONS ST A0886 05 ST A0886 03 FIGURE 8 COMPONENT LOCATIONS ST A0886 28 ...

Page 6: ...25E 3 60 460 6 4 44 2 0 10 0 46 50 50 BLT 3 2 X 18 0 X 18 0 36 0 1 00 16000 82 72 1836 2056 51 X 457 X 457 3 345 7551 2325 832 8 932 6 3 2 X 18 0 X 24 0 2041 51 X 457 X 610 A180DM35E 3 60 460 6 4 44 2 0 10 0 46 50 50 BLT 3 2 X 18 0 X 18 0 36 0 1 00 16000 82 72 1871 2091 51 X 457 X 457 3 345 7551 2325 848 7 948 5 3 2 X 18 0 X 24 0 2041 51 X 457 X 610 A180YL25E 3 60 575 5 0 34 1 0 8 0 34 35 35 BLT 3...

Page 7: ...A240DM30E 3 60 460 9 3 59 6 2 0 11 2 59 60 60 BLT 3 2 X 18 0 X 18 0 36 0 1 00 16000 77 72 1930 2150 51 X 457 X 457 3 345 7551 2183 875 4 975 2 3 2 X 18 0 X 24 0 2041 51 X 457 X 610 A240DM40E 3 60 460 9 3 59 6 2 0 11 2 59 60 60 BLT 3 2 X 18 0 X 18 0 36 0 1 00 16000 77 72 1954 2174 51 X 457 X 457 3 345 7551 2183 886 3 986 1 3 2 X 18 0 X 24 0 2041 51 X 457 X 610 A240YL30E 3 60 575 7 7 49 4 1 0 8 0 45...

Page 8: ...7 107 2083 2303 51 X 457 X 457 3 345 7551 3317 944 8 1044 6 3 2 X 18 0 X 24 0 3033 51 X 457 X 610 A300DM40E 3 60 460 10 4 70 1 5 11 2 67 70 70 BLT 3 2 X 18 0 X 18 0 36 0 2 00 16000 117 107 2107 2327 51 X 457 X 457 3 345 7551 3317 955 7 1055 5 3 2 X 18 0 X 24 0 3033 51 X 457 X 610 A300YL30E 3 60 575 8 5 54 1 0 8 0 49 50 50 BLT 3 2 X 18 0 X 18 0 36 0 2 00 16000 117 107 2061 2281 51 X 457 X 457 3 345...

Page 9: ...M25E 3 60 460 6 4 44 2 0 10 0 46 50 50 BLT 3 2 X 18 0 X 18 0 36 0 1 00 16000 82 72 1836 2056 51 X 457 X 457 3 345 7551 2325 832 8 932 6 3 2 X 18 0 X 24 0 2041 51 X 457 X 610 A180DM35E 3 60 460 6 4 44 2 0 10 0 46 50 50 BLT 3 2 X 18 0 X 18 0 36 0 1 00 16000 82 72 1871 2091 51 X 457 X 457 3 345 7551 2325 848 7 948 5 3 2 X 18 0 X 24 0 2041 51 X 457 X 610 A180YL25E 3 60 575 5 0 34 1 0 8 0 34 35 35 BLT ...

Page 10: ...10 A240DM30E 3 60 460 9 0 62 2 0 11 2 58 60 60 BLT 3 2 X 18 0 X 18 0 36 0 2 00 16000 117 107 2018 2238 51 X 457 X 457 3 345 7551 3317 915 3 1015 1 3 2 X 18 0 X 24 0 3033 51 X 457 X 610 A240DM40E 3 60 460 9 0 62 2 0 11 2 58 60 60 BLT 3 2 X 18 0 X 18 0 36 0 2 00 16000 117 107 2042 2262 51 X 457 X 457 3 345 7551 3317 926 2 1026 0 3 2 X 18 0 X 24 0 3033 51 X 457 X 610 A240YL30E 3 60 575 7 1 50 1 0 8 0...

Page 11: ... are especially corrosive 3 A liquid cleaner may be used several times a year to remove matter that will not wash off with water Several different types of protective coatings are offered in some areas These coatings may provide some benefit but the effectiveness of such coating materials cannot be verified by the equipment manufacturer The best protection is frequent cleaning maintenance and mini...

Page 12: ...nlet hood 1 Remove screws securing blower access panel and remove access panel For location of blower access panel see Figure 3 2 Remove exhaust combustion air inlet hoods from the cartons located inside the blower compartment 3 Attach blower access panel 4 Attach the combustion air inlet exhaust hoods with screws Reference Figure 4 for proper location Screws are in carton with the hood 5 Vent the...

Page 13: ...13 E CLEARANCES The following minimum clearances must be observed for proper unit performance and serviceability Reference Figure 12 FIGURE 12 CLEARANCES ST A0886 09 ...

Page 14: ...tor should fabricate ductwork in accordance with local codes Use industry manuals as a guide when sizing and designing the duct system Contact Air Conditioning Contractors of America 1513 16th St N W Washington D C 20036 DO NOT UNDER ANY CIRCUMSTANCES CONNECT RETURN DUCTWORK TO ANY OTHER HEAT PRODUCING DEVICE SUCH AS FIREPLACE INSERT STOVE ETC UNAUTHORIZED USE OF SUCH DEVICES MAY RESULT IN FIRE CA...

Page 15: ...hat the user building owner must be informed against future changes in construction which might change this to a confined space Also caution the user building owner against any future installation of additional equipment such as power ventilators clothes dryers etc within the existing unconfined and or confined space which might create a negative pressure within the vicinity of other solid liquid ...

Page 16: ...n 1 2 PSIG TO CHECK FOR GAS LEAKS USE A SOAP AND WATER SOLUTION OR OTHER APPROVED METHOD DO NOT USE AN OPEN FLAME DO NOT USE AN OPEN FLAME TO CHECK FOR LEAKS THE USE OF AN OPEN FLAME CAN RESULT IN FIRE EXPLOSION PROPERTY DAMAGE PERSONAL INJURY OR DEATH WARNING FIGURE 17 SUGGESTED GAS PIPING IMPORTANT Check the rating plate to make certain the appliance is equipped to burn the type of gas supplied ...

Page 17: ...nlet pressure Based on a Pressure Drop of 0 5 Inch Water Column TABLE 4 LP GAS PIPE CAPACITY TABLE CU FT HR Nominal Iron Pipe Size Inches 10 20 30 40 50 60 70 80 90 100 125 150 275 189 152 129 114 103 96 89 83 78 69 63 567 393 315 267 237 217 196 182 173 162 146 132 1 071 732 590 504 448 409 378 346 322 307 275 252 2 205 1 496 1 212 1 039 913 834 771 724 677 630 567 511 3 307 2 299 1 858 1 559 1 4...

Page 18: ...FT HEATING VALUE OF GAS BTU PER CU FT 900 1000 1040 1100 2500 MIN SEC MIN SEC MIN SEC MIN SEC MIN SEC TABLE 5 Start the furnace and measure the time required to burn one cubic foot of gas Prior to checking the furnace input make certain that all other gas appliances are shut off with the exception of pilot burners Time the meter with only the furnace in operation IMPORTANT NOTE FOR ALTITUDES ABOVE...

Page 19: ...ore than 3 conductors in a raceway or cable see the N E C C E C in Canada for derating the ampacity of each conductor IMPORTANT THIS UNIT IS AP PROVED FOR USE WITH COPPER CONDUCTORS ONLY CONNECTED TO UNIT CONTACTOR WARRANTY MAY BE JEOPARDIZED IF ALUMINUM WIRE IS CONNECTED TO UNIT CONTACTOR Special instructions apply for power wiring with aluminum conductors Warranty is void if connections are not ...

Page 20: ...low voltage wiring should be sized as shown in Table 7 Install the room thermostat in accordance with the instruction sheet packed in the box with the thermostat Run the thermostat lead wires through control entry opening Figure 2 or Figure 21 and connect to the low voltage thermostat connections see wiring diagram Never install the thermostat on an outside wall or where it will be influenced by d...

Page 21: ...xed 45 seconds indoor blower delay on the control energizes the indoor blower 10 After a fixed 120 seconds second stage warmup period control checks the thermostat input If W1 and W2 is present control enters normal operating loop where all inputs are continuously checked F First Stage and Second Stage Removed Simultaneously 1 Upon a loss of W1 and W2 the gas valve is de energized 2 Upon a loss of...

Page 22: ...rtment Operation of this control indicates an abnormal condition Therefore the unit should be examined by a qualified installer service agency or the gas supplier before being placed back into operation DO NOT JUMPER THIS DEVICE DO NOT reset the overtemperature control without taking corrective action to assure that an adequate supply of combustion air is maintained under all conditions of operati...

Page 23: ...the heat exchanger top Flush the inside of each heat exchanger tube with water Blow out each tube with air to remove excessive moisture 11 Reassemble steps 1 through 9 in reverse order Be careful not to strip out the screw holes used to mount the collector box and inducer blower Replace inducer blower gasket and collector box gasket with factory replacements if damaged HOLES IN THE EXHAUST TRANSIT...

Page 24: ...T Do not use excessive water pressure Excessive water pressure can bend the fins and tubing of the coil and lead to inadequate unit performance Be careful not to splash water excessively into unit 3 Inspect the drain pan and condensate drain at the same time the evaporator coil is checked Clean the drain pan by flushing with water and removing any matters of obstructions which may be present 4 Go ...

Page 25: ... 1812 2056 2299 2543 2786 2759 3064 3369 3675 3980 4285 4591 4896 767 783 799 815 896 905 914 923 932 941 950 959 968 1956 2199 2443 2686 2632 2938 3243 3548 3854 4159 4464 4770 5075 786 802 818 900 909 918 927 936 945 954 963 972 2100 2343 2586 2506 2812 3117 3422 3727 4033 4338 4643 4949 806 822 904 913 922 931 940 949 958 967 976 2243 2487 2380 2685 2991 3296 3601 3907 4212 4517 4823 899 908 91...

Page 26: ... 3616 3860 4106 4411 4717 5022 5327 5633 5938 6243 6549 6854 7159 876 928 937 946 955 964 973 982 991 1000 1009 1018 1027 3760 3980 4285 4591 4896 5201 5506 5812 6117 6422 6728 7033 7338 932 941 950 959 968 977 986 995 1004 1013 1022 1031 3854 4159 4464 4770 5075 5380 5686 5991 6296 6602 6907 7212 945 954 963 972 981 990 999 1008 1017 1026 1035 1044 4033 4338 4643 4949 5254 5559 5865 6170 6475 678...

Page 27: ...or terminals voltage must be within 10 of rating plate volts when unit is operating Compressor short cycles Incorrect voltage At compressor terminals voltage must be 10 of nameplate marking when unit is operating Defective overload protector Replace check for correct voltage Refrigerant undercharge Add refrigerant Registers sweat Low evaporator airflow Increase speed of blower or reduce restrictio...

Page 28: ...VOLTAGE TRANSFORMER CHECK WIRING CHECK FOR 208 230 VAC TO IDM MOTOR CHECK IGNITOR CABLE CHECK SPARK IGNITOR POSITION AND CONDITION IS EACH NEGATIVE PRESSURE SWITCH CLOSED CHECK FOR OPEN ROLL OUT CONTROLS CHECK FOR OPEN LIMIT CHECK IGNITION CONTROL CHASSIS GROUND WIRE CHECK WIRING CHECK INLET GAS PRESSURE CHECK 24 VOLTS TO GAS VALVE CHECK FOR GAS FLOW TO AND FROM VALVE CHECK BURNER CARRYOVER NOTE T...

Page 29: ... PROPER THERMOSTAT OPERATION REMOVE VALVE LEAD AT GAS VALVE IF VALVE CLOSES RECHECK THE THERMOSTAT AND WIRING IF OK THEN REPLACE VALVE YES NO SYSTEM RUNS UNTIL CALL FOR HEAT ENDS TROUBLESHOOTING ENDS REPEAT PROCEDURE UNTIL TROUBLE FREE OPERATION IS OBTAINED YES NO TURN THERMOSTAT OFF VALVE SHUTS OFF FLAME SHUTS OFF YES INDUCED DRAFT MOTOR S STOPS AFTER 5 SECOND POSTPURGE YES YES CHECK FOR DIRTY FI...

Page 30: ...30 FIGURE 26 ...

Page 31: ...31 FIGURE 27 ...

Page 32: ...32 FIGURE 28 ...

Page 33: ...33 FIGURE 29 ...

Page 34: ...34 SYSTEM CHARGE CHARTS FIGURE 30 ...

Page 35: ...35 SYSTEM CHARGE CHARTS FIGURE 31 ...

Page 36: ...36 SYSTEM CHARGE CHARTS FIGURE 32 ...

Page 37: ... failed part to the port of entry into the continental United States SERVICE LABOR RESPONSIBILITY This Warranty does not cover any labor expenses for service nor for removing or reinstalling parts All such expenses are your responsibility unless a service labor agreement exists between you and your contractor HOW TO OBTAIN WARRANTY PERFORMANCE You must promptly report any failure covered by this W...

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