Rheem A180CL25E User manual

92-23577-56-01
SUPERSEDES 92-23577-56-00
INSTALLATION INSTRUCTIONS
FOR COMBINATION HEATING
AND COOLING ROOFTOP UNITS
15, 20 & 25 TON (-)KKB
AND 15 & 20 TON (-)KMB UNITS
!
If the information in these instructions is not followed exactly, a
fire or explosion may result, causing property damage, personal
injury or death.
THESE INSTRUCTIONS ARE
INTENDED AS AN AID TO
QUALIFIED SERVICE
PERSONNEL FOR PROPER
INSTALLATION, ADJUSTMENT
AND OPERATION OF THIS
UNIT. READ THESE
INSTRUCTIONS THOROUGHLY
BEFORE ATTEMPTING
INSTALLATION OR
OPERATION. FAILURE TO
FOLLOW THESE
INSTRUCTIONS MAY RESULT
IN IMPROPER INSTALLATION,
ADJUSTMENT, SERVICE OR
MAINTENANCE, POSSIBLY
RESULTING IN FIRE,
ELECTRICAL SHOCK, CARBON
MONOXIDE POISONING,
EXPLOSION, PROPERTY
DAMAGE, PERSONAL INJURY
OR DEATH.
WARNING
Recognize this symbol as an indication of Important Safety Information!
!
— Do not store or use gasoline or other
flammable vapors and liquids, or other
combustible materials 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.
• 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 BEABLE TO
SMELL FUEL GASES.
• U.L. recognized fuel gas and CO
detectors are recommended in all
applications, and their installation should
be in accordance with the manufacturer’s
recommendations and/or local laws,
rules, regulations, or customs
— Improper installation, adjustment, alteration,
service or maintenance can cause injury,
property damage or death. Refer to this
manual. Installation and service must be
performed by a qualified installer, service
agency or the gas supplier.
WARNING
!
PROPOSITION 65: THIS FURNACE CONTAINS FIBERGLASS
INSULATION. RESPIRABLE PARTICLES OF FIBERGLASS ARE
KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER.
EXHAUST GAS FROM THIS FURNACE CONTAINS CHEMICALS,
INCLUDING CARBON MONOXIDE, KNOWN TO THE STATE OF
CALIFORNIA TO CAUSE BIRTH DEFECTS OR OTHER REPRO-
DUCTIVE HARM.
WARNING
!
FOR YOUR SAFETY
!
DO NOT DESTROY.
PLEASE READ CAREFULLY AND KEEP
IN A SAFE PLACE FOR FUTURE
REFERENCE BY A SERVICEMAN OR
USER OF THIS APPLIANCE.

2
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

3
FIGURE 1. BOTTOM VIEW
FIGURE 2. SUPPLY AND
RETURN 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

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

5
FIGURE 7.
COMPONENT ACCESS
LOCATIONS &
DIMENSIONS
FIGURE 6. DIMENSIONS
ST-A0886-05
ST-A0886-03
FIGURE 8.
COMPONENT
LOCATIONS
ST-A0886-28

6
A180CL25E 3-60-208-230 12.4/12.4 88 2.4 11.5 74/74 80/80 80/80 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1790 2010
[51 X 457 X 457] [3.345] [7551] [2325]/ [811.9] [911.7]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180CL35E 3-60-208-230 12.4/12.4 88 2.4 11.5 74/74 80/80 80/80 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1817 2037
[51 X 457 X 457] [3.345] [7551] [2325]/ [824.2] [924.0]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180CM25E 3-60-208-230 12.4/12.4 88 2.4 14.7 77/77 80/80 80/80 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1820 2040
[51 X 457 X 457] [3.345] [7551] [2325]/ [825.5] [925.3]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180CM35E 3-60-208-230 12.4/12.4 88 2.4 14.7 77/77 80/80 80/80 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1847 2067
[51 X 457 X 457] [3.345] [7551] [2325]/ [837.8] [937.6]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180DL25E 3-60-460 6.4 44 2.0 7.0 43 45 45 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1806 2026
[51 X 457 X 457] [3.345] [7551] [2325]/ [819.2] [919.0]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180DL35E 3-60-460 6.4 44 2.0 7.0 43 45 45 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1841 2061
[51 X 457 X 457] [3.345] [7551] [2325]/ [835.1] [934.9]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180DM25E 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) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1806 2026
[51 X 457 X 457] [3.345] [7551] [2325]/ [819.2] [919.0]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180YL35E 3-60-575 5.0 34 1.0 8.0 34 35 35 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1817 2037
[51 X 457 X 457] [3.345] [7551] [2325]/ [824.2] [924.0]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180YM25E 3-60-575 5.0 34 1.0 8.0 34 35 35 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]
SHIPPING
LBS.
[KG]
TABLE 1
15, 20 & 25 TON (-)KKB – ELECTRICAL& PHYSICAL DATA
ELECTRICAL
MODEL
NUMBER
PHASE
FREQUENCY
VOLTAGE
(HZ)
(VOLTS)
RATED
LOAD
AMPERES
(RLA)[EA.]
COMPRESSOR
LOCKED
ROTOR
AMPERES
(LRA)[EA.]
FULL LOAD
AMPERES
(FLA)
FAN
MTR
[EA.]
BLWR
MTR
MINIMUM
CIRCUIT
AMPACITY
AMPERES MIN.
AMPS MAX.
AMPS
FUSE OR HACR
CIRCUIT
BREAKER DRIVE
TYPE RECOMMENDED
NO.AND SIZE
[mm x mm x mm]
AREA
SQ. FT.
[SQ. M]
NO.
ROWS CFM
[L/s]
R22
OZ.
[G]
SYSTEM
PER
CIRCUIT
1,2/3,4
NET
LBS.
[KG]
FILTER OUTDOOR COIL WEIGHT
PHYSICAL

7
A180YM35E 3-60-575 5.0 34 1.0 8.0 34 35 35 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]
A240CL30E 3-60-208-230 17.8/17.8 124 2.4 14.7 100/100 110/110 110/110 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 77/72 1884 2104
[51 X 457 X 457] [3.345] [7551] [2183]/ [854.6] [954.4]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A240CL40E 3-60-208-230 17.8/17.8 124 2.4 14.7 100/100 110/110 110/110 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 77/72 1900 2120
[51 X 457 X 457] [3.345] [7551] [2183]/ [861.8] [961.6]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A240CM30E 3-60-208-230 17.8/17.8 124 2.4 22.3 108/108 110/110 110/110 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 77/72 1906 2126
[51 X 457 X 457] [3.345] [7551] [2183]/ [864.5] [964.3]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A240CM40E 3-60-208-230 17.8/17.8 124 2.4 22.3 108/108 110/110 110/110 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 77/72 1922 2142
[51 X 457 X 457] [3.345] [7551] [2183]/ [871.8] [971.6]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A240DL30E 3-60-460 9.3 59.6 2.0 10.0 58 60 60 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 77/72 1908 2128
[51 X 457 X 457] [3.345] [7551] [2183]/ [865.5] [965.2]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A240DL40E 3-60-460 9.3 59.6 2.0 10.0 58 60 60 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 77/72 1932 2152
[51 X 457 X 457] [3.345] [7551] [2183]/ [876.3] [976.1]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
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 50 50 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 77/72 1908 2128
[51 X 457 X 457] [3.345] [7551] [2183]/ [865.5] [965.2]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A240YL40E 3-60-575 7.7 49.4 1.0 8.0 45 50 50 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 77/72 1932 2152
[51 X 457 X 457] [3.345] [7551] [2183]/ [876.3] [976.1]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A240YM30E 3-60-575 7.7 49.4 1.0 8.8 46 50 50 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]
A240YM40E 3-60-575 7.7 49.4 1.0 8.8 46 50 50 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]
SHIPPING
LBS.
[KG]
TABLE 1 – CONTINUED
15, 20 & 25 TON (-)KKB – ELECTRICAL& PHYSICAL DATA
ELECTRICAL
MODEL
NUMBER
PHASE
FREQUENCY
VOLTAGE
(HZ)
(VOLTS)
RATED
LOAD
AMPERES
(RLA)[EA.]
COMPRESSOR
LOCKED
ROTOR
AMPERES
(LRA)[EA.]
FULL LOAD
AMPERES
(FLA)
FAN
MTR
[EA.]
BLWR
MTR
MINIMUM
CIRCUIT
AMPACITY
AMPERES MIN.
AMPS MAX.
AMPS
FUSE OR HACR
CIRCUIT
BREAKER DRIVE
TYPE RECOMMENDED
NO.AND SIZE
[mm x mm x mm]
AREA
SQ. FT.
[SQ. M]
NO.
ROWS CFM
[L/s]
R22
OZ.
[G]
SYSTEM
PER
CIRCUIT
1,2/3,4
NET
LBS.
[KG]
FILTER OUTDOOR COIL WEIGHT
PHYSICAL

8
A300CL30E 3-60-208-230 21.0/21.0 156 2.3 14.7 114/114 125/125 125/125 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 2037 2257
[51 X 457 X 457] [3.345] [7551] [3317]/ [940.3] [1023.8]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A300CL40E 3-60-208-230 21.0/21.0 156 2.3 14.7 114/114 125/125 125/125 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 2053 2273
[51 X 457 X 457] [3.345] [7551] [3317]/ [931.2] [1031.0]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A300CM30E 3-60-208-230 21.0/21.0 156 2.3 22.3 122/122 125/125 125/125 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 2059 2279
[51 X 457 X 457] [3.345] [7551] [3317]/ [933.9] [1033.7]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A300CM40E 3-60-208-230 21.0/21.0 156 2.3 22.3 122/122 125/125 125/125 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 2075 2295
[51 X 457 X 457] [3.345] [7551] [3317]/ [941.2] [1041.0]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A300DL30E 3-60-460 10.4 70 1.5 10.0 61 70 70 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] [7551] [3317]/ [934.8] [1034.6]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A300DL40E 3-60-460 10.4 70 1.5 10.0 61 70 70 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 2085 2305
[51 X 457 X 457] [3.345] [7551] [3317]/ [945.7] [1045.5]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A300DM30E 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 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] [7551] [3317]/ [934.8] [1034.6]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A300YL40E 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 2085 2305
[51 X 457 X 457] [3.345] [7551] [3317]/ [945.7] [1045.5]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A300YM30E 3-60-575 8.5 54 1.0 8.8 50 50 50 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 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]
A300YM40E 3-60-575 8.5 54 1.0 8.8 50 50 50 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]
SHIPPING
LBS.
[KG]
TABLE 1 – CONTINUED
15, 20 & 25 TON (-)KKB – ELECTRICAL& PHYSICAL DATA
ELECTRICAL
MODEL
NUMBER
PHASE
FREQUENCY
VOLTAGE
(HZ)
(VOLTS)
RATED
LOAD
AMPERES
(RLA)[EA.]
COMPRESSOR
LOCKED
ROTOR
AMPERES
(LRA)[EA.]
FULL LOAD
AMPERES
(FLA)
FAN
MTR
[EA.]
BLWR
MTR
MINIMUM
CIRCUIT
AMPACITY
AMPERES MIN.
AMPS MAX.
AMPS
FUSE OR HACR
CIRCUIT
BREAKER DRIVE
TYPE RECOMMENDED
NO.AND SIZE
[mm x mm x mm]
AREA
SQ. FT.
[SQ. M]
NO.
ROWS CFM
[L/s]
R22
OZ.
[G]
SYSTEM
PER
CIRCUIT
1,2/3,4
NET
LBS.
[KG]
FILTER OUTDOOR COIL WEIGHT
PHYSICAL

9
A180CL25E 3-60-208-230 12.4/12.4 88 2.4 11.5 74/74 80/80 80/80 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1790 2010
[51 X 457 X 457] [3.345] [7551] [2325]/ [811.9] [911.7]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180CL35E 3-60-208-230 12.4/12.4 88 2.4 11.5 74/74 80/80 80/80 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1817 2037
[51 X 457 X 457] [3.345] [7551] [2325]/ [824.2] [924.0]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180CM25E 3-60-208-230 12.4/12.4 88 2.4 14.7 77/77 80/80 80/80 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1820 2040
[51 X 457 X 457] [3.345] [7551] [2325]/ [825.5] [925.3]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180CM35E 3-60-208-230 12.4/12.4 88 2.4 14.7 77/77 80/80 80/80 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1847 2067
[51 X 457 X 457] [3.345] [7551] [2325]/ [837.8] [937.6]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180DL25E 3-60-460 6.4 44 2.0 7.0 43 45 45 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1806 2026
[51 X 457 X 457] [3.345] [7551] [2325]/ [819.2] [919.0]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180DL35E 3-60-460 6.4 44 2.0 7.0 43 45 45 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1841 2061
[51 X 457 X 457] [3.345] [7551] [2325]/ [835.1] [934.9]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180DM25E 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) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1806 2026
[51 X 457 X 457] [3.345] [7551] [2325]/ [819.2] [919.0]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180YL35E 3-60-575 5.0 34 1.0 8.0 34 35 35 BLT (3) 2 X 18.0 X 18.0 36.0 1.00 16000 82/72 1841 2061
[51 X 457 X 457] [3.345] [7551] [2325]/ [835.1] [934.9]
(3) 2 X 18.0 X 24.0 [2041]
[51 X 457 X 610]
A180YM25E 3-60-575 5.0 34 1.0 8.0 34 35 35 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]
SHIPPING
LBS.
[KG]
TABLE 2
15 & 20 TON (-)KMB – ELECTRICAL& PHYSICAL DATA
ELECTRICAL
MODEL
NUMBER
PHASE
FREQUENCY
VOLTAGE
(HZ)
(VOLTS)
RATED
LOAD
AMPERES
(RLA)[EA.]
COMPRESSOR
LOCKED
ROTOR
AMPERES
(LRA)[EA.]
FULL LOAD
AMPERES
(FLA)
FAN
MTR
[EA.]
BLWR
MTR
MINIMUM
CIRCUIT
AMPACITY
AMPERES MIN.
AMPS MAX.
AMPS
FUSE OR HACR
CIRCUIT
BREAKER DRIVE
TYPE RECOMMENDED
NO.AND SIZE
[mm x mm x mm]
AREA
SQ. FT.
[SQ. M]
NO.
ROWS CFM
[L/s]
R22
OZ.
[G]
SYSTEM
PER
CIRCUIT
1,2,3,4
NET
LBS.
[KG]
FILTER OUTDOOR COIL WEIGHT
PHYSICAL

10
A180YM35E 3-60-575 5.0 34 1.0 8.0 34 35 35 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]
A240CL30E 3-60-208-230 17.5/17.5 123 2.4 14.7 99/99 110/110 110/110 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 1972 2192
[51 X 457 X 457] [3.345] [7551] [3317]/ [894.5] [994.3]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A240CL40E 3-60-208-230 17.5/17.5 123 2.4 14.7 99/99 110/110 110/110 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 1988 2208
[51 X 457 X 457] [3.345] [7551] [3317]/ [901.7] [1001.5]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A240CM30E 3-60-208-230 17.5/17.5 123 2.4 22.3 107/107 110/110 110/110 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 1994 2214
[51 X 457 X 457] [3.345] [7551] [3317]/ [904.5] [1004.3]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A240CM40E 3-60-208-230 17.5/17.5 123 2.4 22.3 107/107 110/110 110/110 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 2010 2230
[51 X 457 X 457] [3.345] [7551] [3317]/ [911.7] [1011.5]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A240DL30E 3-60-460 9.0 62 2.0 10.0 57 60 60 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 1996 2216
[51 X 457 X 457] [3.345] [7551] [3317]/ [905.4] [1005.2]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A240DL40E 3-60-460 9.0 62 2.0 10.0 57 60 60 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 2020 2240
[51 X 457 X 457] [3.345] [7551] [3317]/ [916.3] [1016.0]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
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 43 45 45 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 1996 2216
[51 X 457 X 457] [3.345] [7551] [3317]/ [905.4] [1005.2]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A240YL40E 3-60-575 7.1 50 1.0 8.0 43 45 45 BLT (3) 2 X 18.0 X 18.0 36.0 2.00 16000 117/107 2020 2240
[51 X 457 X 457] [3.345] [7551] [3317]/ [916.3] [1016.0]
(3) 2 X 18.0 X 24.0 [3033]
[51 X 457 X 610]
A240YM30E 3-60-575 7.1 50 1.0 8.8 43 45 50 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]
A240YM40E 3-60-575 7.1 50 1.0 8.8 43 45 50 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]
SHIPPING
LBS.
[KG]
TABLE 2 – CONTINUED
15 & 20 TON (-)KMB – ELECTRICAL& PHYSICAL DATA
ELECTRICAL
MODEL
NUMBER
PHASE
FREQUENCY
VOLTAGE
(HZ)
(VOLTS)
RATED
LOAD
AMPERES
(RLA)[EA.]
COMPRESSOR
LOCKED
ROTOR
AMPERES
(LRA)[EA.]
FULL LOAD
AMPERES
(FLA)
FAN
MTR
[EA.]
BLWR
MTR
MINIMUM
CIRCUIT
AMPACITY
AMPERES MIN.
AMPS MAX.
AMPS
FUSE OR HACR
CIRCUIT
BREAKER DRIVE
TYPE RECOMMENDED
NO.AND SIZE
[mm x mm x mm]
AREA
SQ. FT.
[SQ. M]
NO.
ROWS CFM
[L/s]
R22
OZ.
[G]
SYSTEM
PER
CIRCUIT
1,2,3,4
NET
LBS.
[KG]
FILTER OUTDOOR COIL WEIGHT
PHYSICAL

11
II. INSTALLATION
A. GENERAL
1. INSTALLATION — Install this unit in
accordance with The American
National Standard Z223.1-latest
edition booklet entitled “National Fuel
Gas Code,” and the requirements or
codes of the local utility or other
authority having jurisdiction.
Additional helpful publications
available from the “National Fire
Protection Association” are: NFPA-
90A - Installation of Air Conditioning
and Ventilating Systems 1985 or
latest edition. NFPA-90B - Warm Air
Heating and Air Conditioning
Systems 1984.
These publications are available
from:
National Fire Protection
Association, Inc.
Batterymarch Park
Quincy, MA 02269
2. PRE-INSTALLATION CHECK-
POINTS — Before attempting any
installation, carefully consider the
following points:
Structural strength of supporting
members
(Rooftop Installation)
Clearances and provision for
servicing
Power supply and wiring
Gas supply and piping
Air duct connections and sizing
Drain facilities and connections
Location for minimum noise and
vibration - away from bedroom
windows
IMPORTANT: Before operating unit,
remove compressor shipping
supports from the compressor base.
Failure to remove supports will casue
noise and vibration.
LOCATION CONSIDERATIONS
The metal parts of this unit may be
subject to rust or deterioration in adverse
environmental conditions. This oxidation
could shorten the equipment’s useful life.
Salt spray, fog or mist in seacoast areas,
sulphur or chlorine from lawn watering
systems, and various chemical
contaminants from industries such as
paper mills and petroleum refineries 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 minimal
exposure to contaminants.
B. OUTSIDE INSTALLATION
THESE UNITS ARE DESIGNED
CERTIFIED FOR OUTDOOR
INSTALLATION ONLY. INSTALLATION
INSIDE ANY PART OF A STRUCTURE
CAN RESULT IN INADEQUATE UNIT
PERFORMANCE AS WELL AS
PROPERTY DAMAGE. INSTALLATION
INSIDE CAN ALSO CAUSE
RECIRCULATION OF FLUE PRODUCTS
INTO THE CONDITIONED SPACE
RESULTING IN PERSONAL INJURY OR
DEATH.
If the unit is to be installed in an area
where contaminants are likely to be a
problem, give special attention to the
equipment location and exposure.
1. Avoid having lawn sprinkler heads
spray directly on the unit cabinet.
2. In coastal areas locate the unit on the
side of the building away from the
waterfront.
3. Shielding by a fence or shrubs may
give some protection.
DISCONNECT ALL POWER TO UNIT
BEFORE STARTING MAINTENANCE.
FAILURE TO DO SO CAN CAUSE
ELECTRICAL SHOCK RESULTING IN
PERSONAL INJURY OR DEATH.
REGULAR MAINTENANCE WILL
REDUCE THE BUILDUP OF
CONTAMINANTS AND HELP TO
PROTECT THE UNIT’S FINISH.
1. Frequent washing of the cabinet, fan
blade and coil with fresh water will
remove most of the salt or other
contaminants that build up on the unit.
2. Regular cleaning and waxing of the
cabinet with an automobile polish will
provide some protection.
!WARNING
!WARNING
FIGURE 9. Outside Slab Installation. Closet Distribution System.
Slab Floor Construction
ST-A0886-25

12
(Typical outdoor slab installation is
shown in Figure 9.)
1. Select a location where external
water drainage cannot collect around
unit.
2. Provide a level slab sufficiently high
enough above grade to prevent
surface water from entering the unit
3. Locate the unit to provide proper
access for inspection and servicing
as shown in Figure 12.
4. Locate unit where operating sounds
will not disturb owner or neighbors.
5. Locate unit so roof runoff water does
not pour directly on the unit. Provide
gutter or other shielding at roof level.
Do not locate unit in an area where
excessive snow drifting may occur or
accumulate.
6. Where snowfall is anticipated, the
height of the unit above the ground
level must be considered. Mount unit
high enough to be above anticipated
maximum area snowfall and to allow
combustion air to enter the
combustion air inlet.
7. Select an area which will keep the
areas of the vent, air intake, and A/C
condenser fins free and clear of
obstructions such as weeds, shrubs,
vines, snow, etc. Inform the user
accordingly.
C.ATTACHING EXHAUSTAND
COMBUSTIONAIR INLET
HOODS
IMPORTANT: Do not operate this unit
without the exhaust/combustion air inlet
hood properly installed. These hoods
are shipped in cartons in the blower
compartment inside the unit and must
be attached when the unit is installed.
See Figure 4.
To attach exhaust/combustion air inlet
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 unit using the flue exhaust
hood, as supplied from the factory,
without alteration or addition. The only
exception is with factory approved
additions.
D.
COVER PANEL
INSTALLATION/
CONVERSION PROCEDURE
DOWNFLOW TO HORIZONTAL
1. Remove the screws and covers from
the outside of the supply and return
sections. Also remove and discard
cover plate. See Figure 7.
2. Install the covers over the bottom
supply and return openings, painted
side up, inserting the leading flange
under the bracket provided. Place
the back flange to top of the front
bracket provided. See Figures 10
and 11.
3. Secure the return and supply cover to
front bracket with two (2) screws.
E.
FILTER REPLACEMENT
This unit is provided with 3 - 18” X 18” X 2”
and 3 - 18” X 24” X 2” disposable filters.
When replacing filters, ensure they are
inserted fully to the back to prevent
bypass. See Figure 5.
Recommended supplier of this filter is
Glassfloss Industries, Inc. or
AAF International
215 Central Avenue
P.O. Box 35690
Louisville, KY 40232
Phone: [phone]
Part #: 54-42541-01 (18" x 18" x 2")
54-42541-03 (18" x 24" x 2")
FIGURE 10. HORIZONTAL
CONVERSION DETAIL
ST-A0886-30
FIGURE 11. HORIZONTAL
CONVERSION DETAIL
ST-A0886-31

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

14
G.
ROOFTOP INSTALLATION
1. Before locating the unit on the roof,
make sure that the roof structure is
adequate to support the weight
involved. (See Electrical & Physical
Tables in this manual.) THIS IS
VERY IMPORTANT AND THE
INSTALLER’S RESPONSIBILITY.
2. For rigging and roofcurb details, see
Figures 14, 15 and 16.
3. The location of the unit on the roof
should be such as to provide proper
access for inspection and servicing.
IMPORTANT: If unit will not be put into
service immediately, block off supply and
return air openings to prevent excessive
condensation.
H.DUCTING
The installing contractor 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,
CARBON MONOXIDE POISONING,
EXPLOSION, PERSONAL INJURY,
PROPERTY DAMAGE OR DEATH.
Place the unit as close to the conditioned
!WARNING
FIGURE 13A. Flat Rooftop Installation, Attic or Drop Ceiling Distributing
System. Mounted on Roofcurb. Curb must be level.
ST-A0886-10
FIGURE 13B. Flat Rooftop Installation, Attic or Drop Ceiling Distributing
System. Mounted on Roofcurb. Curb must be level.
ST-A0886-26

15
FIGURE 15. ROOFCURB
space as possible allowing clearances
as indicated. Run ducts as directly as
possible to supply and return outlets.
Use of non-flammable weatherproof
flexible connectors on both supply and
return connections at unit to reduce
noise transmission is recommended.
On ductwork exposed to outside
temperature and humidity, use a
minimum of 2” of insulation and a vapor
barrier. Distribution system in attic, furred
space or crawl space should be
insulated with at least 2” of insulation. 1/2”
to 1” thick insulation is usually sufficient
for ductwork inside the air conditioned
space.
Provide balancing dampers for each
branch duct in the supply system.
Properly support ductwork from the
structure.
IMPORTANT: In the event that the return
air ducts must be run through an
“unconfined” space containing other fuel
burning equipment, it is imperative that
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, or gas fueled
appliances.
FIGURE 14. LIFTING DETAIL
!WARNING
RETURNAIR
NEVER ALLOW PRODUCTS OF
COMBUSTION OR THE FLUE
PRODUCTS TO ENTER THE RETURN
AIR DUCTWORK, OR THE
CIRCULATING AIR SUPPLY. ALL
RETURN DUCTWORK MUST BE
ADEQUATELY SEALED AND
SECURED TO THE FURNACE WITH
SHEET METAL SCREWS, AND JOINTS
TAPED. ALL OTHER DUCT JOINTS
MUST BE SECURED WITH APPROVED
CONNECTIONS AND SEALED
AIRTIGHT.
FAILURE TO PREVENT PRODUCTS OF
COMBUSTION FROM BEING
CIRCULATED INTO THE LIVING SPACE
CAN CREATE POTENTIALLY
HAZARDOUS CONDITIONS,
INCLUDING CARBON MONOXIDE
POISONING THAT COULD RESULT IN
PERSONAL INJURY OR DEATH.
ST-A0886-12
ST-A0888-02
ST-A0888-02
FIGURE 16. ROOFCURB

16
III. GAS SUPPLY, CONDENSATE DRAINAND PIPING
A. GAS CONNECTION
IMPORTANT: Connect this unit only to
gas supplied by a commercial utility.
1. Install gas piping in accordance with
local codes and regulations of the
local utility company. In the absence
of local codes, the installation must
conform to the specifications of the
National Fuel Gas Code, ANSI
Z223.1 - latest edition.
2. Connect the gas line to the gas valve
supplied with unit. Routing can be
through the gas pipe opening shown
in Figures 9 or 13A or 13B or
through the base as shown in
Figure 21.
3. Size the gas line to the furnace
adequate enough to prevent undue
pressure drop and never less than
1/2(.
4. Install a drip leg or sediment trap in
the gas supply line as close to the
unit as possible.
5. Install an outside ground joint union
to connect the gas supply to the
control assembly at the burner tray.
6. Gas valves have been factory
installed. Install a manual gas valve
where local codes specify a shut-off
valve outside the unit casing. (See
Figure 17.)
7. Make sure piping is tight. A pipe
compound resistant to the action
of liquefied petroleum gases must
be used at all threaded pipe
connections.
IMPORTANT: Disconnect the furnace
and its individual shutoff valve from the
gas supply piping during any pressure
testing of that system at test pressures
in excess of 1/2 pound per square inch
gauge or isolate the system from the gas
supply piping system by closing its
individual manual shutoff valve during
any pressure testing of this gas supply
system at pressures equal to or less
than 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. Care should
be taken after installation of this
equipment that the gas control valve not
be subjected to high gas supply line
pressure.
In making gas connections, avoid strains
as they may cause noise and damage the
controls. A backup wrench is required to
be used on the valve to avoid damage.
The capacities of gas pipe of different
diameters and lengths in cu. ft. per hr. with
pressure drop of 0.3 in. and specific
gravity of 0.60 (natural gas) are shown in
Table 3.
After determining the pipe length, select
the pipe size which will provide the
minimum cubic feet per hour required for
the gas input rating of the furnace. By
formula:
Gas Input of Furnace
(BTU/HR)
Cu. Ft. Per Hr. Required = Heating Value of Gas
(BTU/FT3)
The gas input of the furnace is marked on
the furnace rating plate. The heating value
of the gas (BTU/FT3) may be determined
by consulting the local natural gas utility or
the L.P. gas supplier.
Nominal
Iron Pipe
Size,
Inches
Equivalent Length of Pipe, Feet
10 20 30 40 50 60 70 80
1/2132 92 73 63 56 50 46 43
3/4278 190 152 130 115 105 96 90
1 520 350 285 245 215 195 180 170
11/41,050 730 590 500 440 400 370 350
11/21,600 1,100 890 760 670 610 560 530
TABLE 3
GAS PIPE CAPACITY TABLE (CU. FT./HR.)
FROM GAS
METER
*Factory supplied grommet must be utilized.
MANUAL GAS
SHUT-OFF
VALVE
UNIT GAS SUPPLY
CONNECTION *
ROOF OR GROUND LEVEL INSTALLATION

17
B. LP CONVERSION
THIS UNIT IS EQUIPPED AT THE
FACTORY FOR USE ON NATURAL GAS
ONLY. CONVERSION TO LP GAS
REQUIRES A SPECIAL KIT SUPPLIED
BY THE DISTRIBUTOR OR
MANUFACTURER. MAILING
ADDRESSES ARE LISTED ON THE
FURNACE RATING PLATE, PARTS LIST
AND WARRANTY. FAILURE TO USE
THE PROPER CONVERSION KIT CAN
CAUSE FIRE, CARBON MONOXIDE
POISONING, EXPLOSION, PERSONAL
INJURY, PROPERTY DAMAGE OR
DEATH.
Convert the unit to use liquefied petroleum
(LP) gas by replacing with the stem/spring
assembly supplied in the conversion kit.
The LP gas valve maintains the proper
manifold pressure for LP gas. The correct
burner LP orifices are included in the kit.
See Figure 18Afor component locations.
NOTE: Order the correct LP conversion kit
from the furnace manufacturer. See
Conversion Kit Index shipped with unit
for proper LP kit number. Furnace
conversion to LP gas must be
performed by a qualified technician.
C. ADJUSTING OR CHECKING
FURNACE INPUT
– Natural Gas Line Pressure 5” - 10.5”
W.C.
– LP Gas Line Pressure 11” - 13” W.C.
– Natural Gas Manifold Pressure 3.5”
W.C
– LP Gas Manifold Pressure - 10” W.C.
!WARNING Maximum capacity of pipe in thousands of BTU per hour of undiluted liquefied petroleum gases
(at 11 inches water column inlet 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 1,417 1,275 1,181 1,086 1,023 976 866 787
6,221 4,331 3,465 2,992 2,646 2,394 2,205 2,047 1,921 1,811 1,606 1,496
1/2
3/4
1
1-1/4
1-1/2
2
Length of Pipe, Feet
Example (LP): Input BTU requirement of unit, 150,000
Equivalent length of pipe, 60 ft. = 3/4” IPS required.
Only small variations in the gas flow should
be made by means of the pressure
regulator adjustment. Furnaces functioning
on LP gas must be set by means of the tank
or branch supply regulators. The furnace
manifold pressure should be set at 10” W.C.
at the gas control valve.
FIGURE 18A. HEAT EXCHANGER COMPONENT IDENTIFICATION
ST-A0886-29
Supply and manifold pressure taps are
located on the gas valve body 1/8” N.P.T.
and on the manifold. See Figure 18B.
Use a properly calibrated manometer gauge
for accurate gas pressure readings.
FIGURE 18B. HONEYWELL VR8305Q4120 TWO STAGE GAS VALVE
OUTLET PRESSURE
TAP-1/8 NPT
2-STAGE
OPERATOR
INLET PRESSURE
TAP-1/8 NPT
GROUND
TERMINAL
LOW STAGE ADJUSTMENT
UNDER VENT CAP HIGH STAGE ADJUSTMENT
UNDER VENT CAP

18
250,000 ONE 13.0 14.4 15.0 15.8 36.0
TEN 2 10 2 24 2 30 2 38 6 0
ONE 10.8 12.0 12.5 13.2 30.0
300,000 TEN 148202521250
ONE 9.3 10.3 10.7 1.3 25.7
350,000 TEN 1 33 1 43 1 47 1 53 4 17
ONE 8.1 9.0 9.36 9.9 22.5
400,000 TEN 1 21 1 30 1 36 1 39 3 45
To adjust the pressure regulator, remove
the regulator vent cover and turn the
adjustment screw clockwise to increase
pressure or counterclockwise to decrease
pressure. See Figure 18B. Then replace
the regulator vent cover securely.
Any necessary major changes in the gas
flow rate should be made by changing the
size of the burner orifices. To change orifice
spuds, shut off the manual main gas valve
and remove the gas manifold.
For elevations up to 2,000 feet, rating plate
input ratings apply. For high altitudes
(elevations over 2,000 ft.), see conversion
kit index 92-21519-XX for derating and
orifice spud sizes.
Check of input is important to prevent
over-firing of the furnace beyond its
design-rated input. NEVER SET INPUT
ABOVE THAT SHOWN ON THE RATING
PLATE. Use the following table or
formula to determine input rate.
Heating Value of Gas
(BTU/Cu. Ft.) x 3600
Cu. Ft. Per Hr. Required = Time in Seconds
(for 1 Cu. Ft.) of Gas
METER TIME IN MINUTESAND SECONDS FOR NORMAL
INPUT RATING OF FURNACES EQUIPPED FOR NATURAL
OR LP GAS
INPUT
BTU/HR
METER
SIZE
CU. 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 2,000 FEET (610 METERS):
The main burner orifices in your furnace
and in these kits are sized for the
nameplate input and intended for
installations at elevations up to 2,000
feet in the USA or Canada, or for
elevations of 2,000 - 4,500 feet (610 -
1,373 meters) in Canada if the unit has
been derated at the factory. For
elevations above 2,000 feet (610
meters) IN THE USA ONLY (see ANSI-
Z223.1), the burner orifices must be
sized to reduce the input 4% for each
1,000 feet (305 meters) above sea level.
NOTICE: DERATING OF THE HEATING
INPUT FOR HIGH ALTITUDE IN THE
FIELD IS UNLAWFUL IN CANADA
(REFER TO CAN/CGA 2.17). UNITS
INSTALLED IN ALTITUDES GREATER
THAN 2,000 FEET (610 METERS) MUST
BE SHIPPED FROM THE FACTORY OR
FROM A FACTORY AUTHORIZED
CONVERSION STATION WITH THE
HEATING INPUT DERATED BY 10% SO
AS TO OPERATE PROPERLY IN
ALTITUDES FROM 2,000 - 4,500 FEET
(610 - 1,373 METERS).
D.CONDENSATE DRAIN
The condensate drain connection of the
evaporator is threaded 1” -111/2” NPT.
IMPORTANT: Install a condensate trap to
ensure proper condensate drainage. See
Figure 19.
FIGURE 19. CONDENSATE DRAIN
DO NOT OVERTIGHTEN DRAIN FITTING

19
A.POWER SUPPLY
TURN OFF THE MAIN ELECTRICAL
POWER AT THE BRANCH CIRCUIT
DISCONNECT CLOSEST TO THE UNIT
BEFORE ATTEMPTING ANY WIRING.
FAILURE TO DO SO CAN CAUSE
ELECTRICAL SHOCK RESULTING IN
PERSONAL INJURY OR DEATH.
1. All wiring should be made in
accordance with the National
Electrical Code. Consult the local
power company to determine the
availability of sufficient power to
operate the unit. Check the voltage
at power supply to make sure it
corresponds to the unit’s RATED
VOLTAGE REQUIREMENT. Install a
branch circuit disconnect near the
rooftop, in accordance with the
N.E.C., C.E.C. or local codes.
2. It is important that proper electrical
power is available at the unit.
Voltage should not vary more than
10% from that stamped on the unit
nameplate. On three phase units,
phases must be balanced within 3%.
3. For branch circuit wiring (main power
supply to unit disconnect), the
minimum wire size for the length of
run can be determined from Table 6
using the circuit ampacity found on the
unit rating plate. Use the smallest wire
size allowable from the unit
disconnect to unit.
IV. WIRING
!WARNING
4. For through the base wiring entry
reference Figure 21. All fittings and
conduit are field supplied for this
application. Reference the chart with
Figure 21 for proper hole and conduit
size.
NOTES:
1. For branch circuit wiring (main power
supply to unit disconnect), the
minimum wire size for the length of
run can be determined from this
table using the circuit ampacity
found on the unit rating plate. From
the unit disconnect to unit, the
smallest wire size allowable in Table
1 may be used, as the disconnect
must be in sight of the unit.
2. Wire size based on 75°C rated wire
insulation for 1% voltage drop.
3. For more 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
made per instructions.
Attach a length (6” or more) of
recommended size copper wire to the unit
contactor terminals L1, L2 and L3 for three
phase.
Select the equivalent aluminum wire size
from the tabulation below:
Splice copper wire pigtails to aluminum
wire with U.L. recognized connectors for
copper-aluminum splices. Please exercise
the following instructions very carefully to
obtain a positive and lasting connection:
1. Strip insulation from aluminum
conductor.
2. Coat the stripped end of the aluminum
wire with the recommended inhibitor,
and wire brush the aluminum surface
through inhibitor. INHIBITORS:
Brundy-Pentex “A”; Alcoa-No. 2EJC; T
& B-KPOR Shield.
3. Clean and recoat aluminum conductor
with inhibitor.
4. Make the splice using the above listed
wire nuts or split bolt connectors.
5. Coat the entire connection with
inhibitor and wrap with electrical
insulating tape.
AWG Copper AWGAluminum Connector Type and Size
Wire Size Wire Size (or equivalent)
#12 #10 T & B Wire Nut PT2
#10 # 8 T & B Wire Nut PT3
# 8 # 6 Sherman Split Bolt TSP6
# 6 # 4 Sherman Split Bolt TSP4
# 4 # 2 Sherman Split Bolt TSP2
TABLE 6
FIGURE 20.
TABLE 7
Recommended Branch Circuit
Disconnect Location
ST-A0886-11
COPPER
WIRE SIZE—AWG
SUPPLY WIRE LENGTH—FEET
50 100 150 200 250 300
20 10 8 6 4 4 4
25 10 8 6 4 4 3
30864432
35864321
40864321
45843211/0
50643211/0
60 6 4 2 1 1/0 2/0
70 4 3 2 1/0 2/0 3/0
80 4 3 1 1/0 2/0 3/0
90 3 2 1/0 2/0 3/0 4/0
100 3 2 1/0 2/0 3/0 4/0
110 2 1 2/0 3/0 4/0 250
125 1 1 2/0 3/0 4/0 25
UNIT
MCA

20
WIRE SIZE, AWG
lamps, televisions, radios or air streams
from registers. Refer to instructions packed
with the thermostat for “heater” selection or
adjustment.
The following is a list of recommended
thermostats to be used with or without an
economizer:
B. HOOK-UP
To wire unit, refer to the following hook-
up diagram.
Refer to Figures 2 and 21 for location of
wiring entrances.
Wiring to be done in the field between
the unit and devices not attached to the
unit, or between separate devices which
are field installed and located, shall
conform with the temperature limitation
for Type T wire [63°F rise (35°C)] when
installed in accordance with the
manufacturer’s instructions.
C. INTERNAL WIRING
Adiagram of the internal wiring of this unit
is located on the inside of control access
panel and in this manual. If any of the
original wire as supplied with the
appliance must be replaced, the wire
gauge and insulation must be same as
original wiring.
Transformer is factory wired for 230 volts
on 208/230 volt models and must be
changed for 208 volt applications. See
unit wiring diagram for 208 volt wiring.
D. THERMOSTAT
The room thermostat must be compatible
with the spark ignition control on the unit.
Generally, all thermostats that are not of
the “current robbing” type are compatible
with the integrated furnace control. The 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 drafts, concealed hot
or cold water pipes or ducts, lighting
fixtures, radiation from fireplace, sun rays,
FIELD WIRE SIZE FOR 24 VOLT THERMOSTAT CIRCUITS
SOLID COPPER WIRE - AWG.
3.0 16 14 12 10 10 10
2.5 16 14 12 12 12 10
2.0 18 16 14 12 12 10
50 100 150 200 250 300
Length of Run – Feet (1)
Thermostat Load -
Amps
TABLE 8
(1) The total wire length is the distance from the unit to the thermostat
and back to the unit.
NOTE: DO NOT USE CONTROL WIRING SMALLER THAN NO. 18
AWG.
FIGURE 21. BASE ENTRY LOCATIONS
FIGURE 22. TYPICAL THERMOSTAT WIRING
14
1/2(
7/8(
12
1/2(
7/8(
10
1/2(
7/8(
8
3/4(
1-31/32(
6
1(
1-23/64(
4
1(
1-23/64(
3
1-1/4(
1-23/32(
2
1-1/4(
1-23/32(
1
1-1/2(
1-31/32(
0
1-1/2(
1-31/32(
00
2(
2-15/32(
000
2(
2-15/32(
CONDUIT SIZE
HOLE SIZE
ST-A0886-14
Two Stage Cool/
Two Stage Heat Part #
W/O Economizer
Robertshaw -
Model #09710 41-32971-01
Honeywell -
Model #T874D1959 41-21444-01
White Rodgers -
Model #1F91-7 41-21015-04
Honeywell -
Model #T7300AORB 41-21615-06
NOTES: 1. DETERMINE REQUIRED WIRE SIZE FROM MINIMUM CIRCUIT AMPACITY SHOWN IN INSTALLATION & OPERATING INSTRUCTION.
2. BOTTOM POWER ENTRY WILLNOTACCOMMODATE WIRE LARGER THAN #2 AWG (SHADED AREA).