Rheem RH1V2417STANJA User manual

NSTALLAT ON NSTRUCT ONS
A R HANDLERS
FEATUR NG NDUSTRY STANDARD R-410A REFR GERANT:
(-)H1V Premium fficiency Single Stage with Aluminum Coil
(-)H2V Premium fficiency Two Stage Comfort Control2System™
(-)H2V with Aluminum Coil
refrigerant
WARNING
▲WARN NG
!
These instructions are intended as an aid to qualified licensed
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, property damage, personal injury or death.
ISO 9001:2008
92-20521-65-02
SUP RS D S 92-20521-65-01

CONTENTS
1.0 SAFETY NFORMAT ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.0 GENERAL NFORMAT ON. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Important Information About fficiency and Indoor Air Quality . . . . . . . . . . . . . . 5
2.2 Model Number xplanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Dimensions and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Receiving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.0 APPL CAT ONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Zoning Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Vertical Upflow & Horizontal Left . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Vertical Downflow & Horizontal Right. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.4 Installation in an Unconditioned Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.5 Installation in Mobile/Manufactured Homes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.0 ELECTR CAL W R NG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.1 Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Copper Wire Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 Typical Thermostat Wiring Diagrams (-)H1V, (-)H2V. . . . . . . . . . . . . . . . . . . . . 15
4.5 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.6 Blower Motor lectrical Data (-)H1V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.7 Blower Motor lectrical Data (-)H2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.8 Conventional 24VAC Thermostat Control Wiring (-)H2V . . . . . . . . . . . . . . . . . . 19
4.9 lectric Heat lectrical Data (-)H1V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.10 lectric Heat lectrical Data (-)H2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.11 Heater Kit Supplemental Information (-)H1V & (-)H2V. . . . . . . . . . . . . . . . . . . . 23
5.0 ECM MOTOR NTERFACE CONTROL BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.1 CM Motor Interface Control & Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.2 Using the On-board L D to Determine Blower CFM . . . . . . . . . . . . . . . . . . . . . 25
5.3 Cooling Airflow Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5.4 Cooling Airflow Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.5 lectric Heat Airflow Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.6 Cooling Delay Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.7 Cooling Mode Dehumidification - Passive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.8 Cooling Mode Dehumidification - Active . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.9 On Demand Dehumidification Airflow Adjustment - Active . . . . . . . . . . . . . . . . 29
5.10 Airflow Performance (-)H1V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.11 Airflow Performance Data (-)H1V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.0 A RFLOW PERFORMANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.1 Airflow Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.2 Copper Wire Size - Awg. (3% Voltage Drop) . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.3 Blower Motor lectrical Data (-)H2v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.4 lectric Heat lectrical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.5 Cooling Airflow Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.6 Cooling Airflow Adjustment (-)H2V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.7 lectric Heat Airflow (-)H2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
6.8 Cooling Mode Dehumidification (-)H2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.9 Cooling Delay Profiles (-)H2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
6.10 Using the On-Board L D to determine Blower CFM (-)H2V . . . . . . . . . . . . . . . 36
6.11 Cooling Airflow Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.12 Cooling Airflow Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6.13 Airflow Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.14 lectric Heat Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.15 Cooling Mode Dehumidification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.16 Cooling Delay Profiles (-)H2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.17 Airflow Performance Data (-)H2V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.18 Air Handler Diagnostic Codes (-)H2V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7.0 DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
8.0 REFR GERANT CONNECT ONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8.1 T V Sensing Bulb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
8.2 Condensate Drain Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8.3 Duct Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
9.0 A R F LTER (Not Factory nstalled) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.0 SEQUENCE OF OPERAT ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.1 Cooling (cooling only & heat pump) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.2 Heating (electric heat only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.3 Heating (heat pump) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.4 Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
10.5 mergency Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
10.6 Room Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
11.0 CALCULAT ONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
11.1 Calculating Temperature Rise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
11.2 Calculating BTUH Heating Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
11.3 Calculating Airflow CFM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
11.4 Calculating Correction Factor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
12.0 PRE-START CHECKL ST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
13.0 MA NTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
13.1 Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
13.2 Indoor Coil/Drain Pan/Drain Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
13.3 The Comfort Control2System™ Control Board . . . . . . . . . . . . . . . . . . . . . . . . . 47
13.4 Blower Motor & Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
13.5 Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
13.6 Blower Assembly Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 48
13.7 Motor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
13.8 CM Control Module Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
13.9 Blower Wheel Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
14.0 REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
15.0 ACCESSOR ES - K TS - PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
2

1.0 SAFETY INFORMATION
!WARNING (SEE SECTION 3.2: VERTICAL UPFLOW & HORIZONTAL LEFT)
f unit is to be installed without an indoor coil, return air duct, or plenum, it must
not be in stalled directly over combustible material. f installed without an indoor
coil with a return duct or plenum, the air plenum or duct must have a solid sheet
metal bottom with no return air openings, registers or flexible air ducts located
directly under the unit. Exposing combustible material to the return opening of an
upflow unit without an indoor coil can cause a fire resulting in property damage,
personal injury or death.
Continued on next page ➜
!WARNING
Duct leaks can create an unbalanced system and draw pollutants such as dirt,
dust, fumes and odors into the home causing property damage. Fumes and odors
from toxic, volatile or flammable chemicals, as well as automobile exhaust and
carbon monoxide (CO), can be drawn into the living space through leaking ducts
and unbalanced duct systems causing personal injury or death (see Figure 1).
• f air-moving equipment or ductwork is located in garages or off-garage storage
areas - all joints, seams, and openings in the equipment and duct must be
sealed to limit the migration of toxic fumes and odors including carbon monox-
ide from migrating into the living space.
• f air-moving equipment or ductwork is located in spaces containing fuel burn-
ing appliances such as water heaters or boilers - all joints, seams, and openings
in the equipment and duct must also be sealed to prevent depressurization of
the space and possible migration of combustion byproducts including carbon
monoxide into the living space.
!WARNING (SEE SECTION 14.7: ECM CONTROL MODULE REPLACEMENT)
Always have 240 volt power turned off to the furnace before attempting any
replacement of the motor or control module. Failure to do so may result in seri-
ous equipment damage, personal injury or death.
!WARNING (SEE SECTION 4.0: ELECTRICAL WIRING)
Disconnect all power to unit before installing or servicing. More than one dis-
connect switch may be required to de-energize the equipment. Hazardous volt-
age can cause severe personal injury or death.
!WARNING (SEE SECTION 4.3: GROUNDING)
The unit must be permanently grounded. Failure to do so can result in electrical
shock causing personal injury or death.
!WARNING (SEE SECTION 14.0: MAINTENANCE)
Units with circuit breaker(s) meet requirements as a service disconnect switch,
however, if access is required to the line side (covered) of the circuit breaker,
this side of the breaker(s) will be energized with the breaker(s) de-energized.
Contact with the line side can cause electrical shock resulting in personal
injury or death.
3
!WARNING (SEE SECTION 14.5: BLOWER ASSEMBLY REMOVAL & REPLACEMENT)
f removal of the blower assembly is required, all disconnect switches supplying
power to the airhandler must be de-energized and locked (if not in sight of unit)
so the field power wires can be safely removed from the blower assembly. Failure
to do so can cause electrical shock resulting in personal injury or death.

4
!WARNING
PROPOS T ON 65: This appliance contains fiberglass insulation. Respirable
particles of fiberglass are known to the State of California to cause cancer.
All manufacturer products meet current Federal OSHA Guidelines for safety.
California Proposition 65 warnings are required for certain products, which are
not covered by the OSHA standards.
California's Proposition 65 requires warnings for products sold in California
that contain or produce any of over 600 listed chemicals known to the State of
California to cause cancer or birth defects such as fiberglass insulation, lead in
brass, and combustion products from natural gas.
All “new equipment” shipped for sale in California will have labels stating that
the product contains and/or produces Proposition 65 chemicals. Although we
have not changed our processes, having the same label on all our products
facilitates manufacturing and shipping. We cannot always know “when, or if”
products will be sold in the California market.
You may receive inquiries from customers about chemicals found in, or pro-
duced by, some of our heating and air-conditioning equipment, or found in nat-
ural gas used with some of our products. Listed below are those chemicals and
substances commonly associated with similar equipment in our industry and
other manufacturers.
• Glass Wool (Fiberglass) nsulation
• Carbon Monoxide (CO).
• Formaldehyde
• Benzene
More details are available at the websites for OSHA (Occupational Safety and
Health Administration), at www.osha.gov and the State of California’s OEHHA
(Office of Environmental Health Hazard Assessment), at www.oehha.org.
Consumer education is important since the chemicals and substances on the
list are found in our daily lives. Most consumers are aware that products pre-
sent safety and health risks, when improperly used, handled and maintained.
!WARNING (SEE SECTION 8.0: DUCTWORK)
Do not, under any circumstances, connect return ductwork to any other heat pro-
ducing device such as fireplace insert, stove, etc. Unauthorized use of such
devices may result in fire, carbon monoxide poisoning, explosion, personal injury
or property damage.
!WARNING
Because of possible damage to equipment or personal injury, installation, ser-
vice, and maintenance should be performed by trained, qualified service per-
sonnel. Consumer service is recommended only for filter cleaning/ replace-
ment. Never operate the unit with the access panels removed.
!WARNING (SEE SECTION 3.3: VERTICAL DOWNFLOW & HORIZONTAL RIGHT)
The RXHB-17, RXHB-21, or RXHB-24 combustible floor base is required when
certain units are applied downflow on combustible flooring. Failure to use the
base can cause a fire resulting in property damage, personal injury or death.
See clearances for units requiring a combustible floor base. See the accessory
section in this manual for combustible floor base RXHB-.
!CAUTION (SEE SECTION 14.7: ECM CONTROL MODULE REPLACEMENT)
Reversing the 5-pin connector on the ECM motor causes immediate failure of
the control module.
Continued on next page ➜
!WARNING
The first 36 inches of supply air plenum and ductwork must be constructed of
sheet metal as required by NFPA 90B. The supply air plenum or duct must have a
solid sheet metal bottom directly under the unit with no openings, registers or
flexible air ducts located in it. f flexible supply air ducts are used they may be
located only in the vertical walls of a rectangular plenum, a minimum of 6 inches
from the solid bottom. Metal plenum or duct may be connected to the combustible
floor base, if not, it must be connected to the unit supply duct flanges such that
combustible floor or other combustible material is not exposed to the supply air
opening from the downflow unit. Exposing combustible (non-metal) material to the
supply openings of a downflow unit can cause a fire resulting in property damage,
personal injury or death.

2.0 GENERAL INFORMATION
2.1 IMPORTANT INFORMATION ABOUT EFFICIENCY AND INDOOR
2.1 AIR QUALITY
Central cooling and heating equipment is only as efficient as the duct system that car ries
the cooled or heated air. To maintain efficiency, comfort and good indoor air quality, it is
important to have the proper balance between the air being supplied to each room and
the air returning to the cooling and heating equipment.
Proper balance and sealing of the duct system improves the efficiency of the heating
and air conditioning system and improves the indoor air quality of the home by reducing
the amount of airborne pollutants that enter homes from spaces where the ductwork and
/ or equipment is located. The manufacturer and the U.S. nvironmental Protection
Agency’s nergy Star Program recommend that central duct systems be checked by a
qualified contractor for proper balance and sealing.
CAUTION (SEE SECTION 3.2: VERTICAL UPFLOW & HORIZONTAL LEFT)
Horizontal units must be configured for right hand air supply. Horizontal drain
pan must be located under indoor coil. Failure to use the drain pan can result in
property damage.
5
CAUTION (SEE SECTION 14.2: INDOOR COIL - DRAIN PAN - DRAIN LINE)
n compliance with recognized codes, it is recommended that an auxiliary
drain pan be installed under all evaporator coils or units containing evaporator
coils that are located in any area of a structure where damage to the building
or building contents may occur as a result of an overflow of the coil drain pan
or a stoppage in the primary condensate drain piping. See accessory section
in this manual for secondary horizontal drain pan RXBM-.
When used on cooling applications, excessive sweating may occur when unit
is installed in an unconditioned space. This can result in property damage.
!NOTICE
mproper installation, or installation not made in accordance with the
Underwriters Laboratory (UL) certification or these instructions, can result
in unsatisfactory operation and/or dangerous conditions and are not cov-
ered by the unit warranty.
!NOTICE
n compliance with recognized codes, it is recommended that an auxiliary
drain pan be installed under all evaporator coils or units containing evapo-
rator coils that are located in any area of a structure where damage to the
building or building contents may occur as a result of an overflow of the
coil drain pan or a stoppage in the primary condensate drain piping. See
accessories section of these instructions for auxiliary horizontal overflow
pan information (model RXBM).
!NOTICE
Use of this air-handler during construction is not recommended. f opera-
tion during construction is absolutely required, the following temporary
installation requirements must be followed:
nstallation must comply with all nstallation nstructions in this manual
including the following items:
• Properly sized power supply and circuit breaker/fuse
• Air-handler operating under thermostatic control;
• Return air duct sealed to the air-handler;
• Air filters must be in place;
• Correct air-flow setting for application
• Removing the coil and storing it in a clean safe place is highly recom-
mended until construction is completed and the outdoor unit is installed.
• Clean air-handler, duct work, and components including coil upon com-
pletion of the construction process and verify proper air-handler operat-
ing conditions according as stated in this instruction manual.
• NOTE: Electric strip heater elements tend to emit a burning odor for a few
days if dust has accumulated during construction. Heater elements are
easily damaged. Take great care when cleaning them. Low pressure com-
pressed air is recommended for cleaning elements.
!NOTICE

W DTH
17 = 17.5” (600-1200 CFM) 24 = 24.5 (1400-1800 CFM)
21 = 21” (800-1600 CFM)
NOM NAL CAPAC TY
24 = 18,000-24,000 BTU/H
36 = 30,000-36,000 BTU/H
48 = 42,000-48,000 BTU/H
60 = 60,000 BTU/H
F GURE 2
MODEL NUMBER EXPLANAT ON
(-) H 1 V 24 17 S T A N A A ***
NOTES:
1) J Voltage (230V) single phase air handler is designed to be used with single or three phase 230 volt power. In the case
of connecting 3-phase power to the air handler terminal block, bring only two leads to the terminal block. Cap, insulate
and fully secure the third lead.
2) The air handlers are shipped from the factory with the proper indoor coil installed, and cannot be ordered without a coil.
3) lectric heat elements are field-installed items.
4) The air handlers do not have an internal filter rack. An external filter rack or other means of filtration is required.
2.2 MODEL NUMBER EXPLANATION (SEE FIGURE 2)
AVA LABLE MODELS
RH1V2417STANJA
RH1V3617STANJA
RH1V3621MTANJA
RH1V4821STANJA
RH1V4824STANJA
RH1V6024STANJA
AVA LABLE MODELS
RHIV3621HTANTA
RHIV4821MTANTA
RHIV6021STANTA
RH2V2421HTACJA
RH2V3624HTACJA
RH2V4824HTACJA
RH2V6024HTACJA
F GURE 1
M GRAT ON OF DANGEROUS SUBSTANCES, FUMES, AND ODORS NTO L V NG SPACES
6
OPT ON CODE
(S ADS-3803)
BLANK = NON
M NOR SER ES
A = FIRST
VOLTAGE
A = 115/1/60 J = 208/240/1/50
D = 480/3/60 T = 220/240/1/50
MOTOR TYPE
V = CM
STAGES OF A R FLOW
1 = SINGL
2 = TWO STAG
PRODUCT CATEGORY
H = AIR HANDL R
CONTROLS
C = COMMUNICATING
N = NON-COMMUNICATING
MAJOR SER ES
A = FIRST
METER NG DEV CE
T = T V P = PISTON
= V
CO L EFF C ENCY
S = STANDARD H = HIGH
M = M DIUM
BRAND

Model Return Air Opening Return Air Opening
Cabinet Size Width (Inches) Depth/Length (Inches)
17 157⁄8193⁄4
21 193⁄8193⁄4
24 227⁄8193⁄4
MOD L
SIZ
(-)H1V
LIQUID
R FRIG RANT CONN CTIONS
SW AT (IN.) [mm] ID
VAPOR
UNIT
H IGHT
“H” IN
[mm]
SUPPLY
DUCT
“A” IN.
[mm] LO HI UNIT WITH
COIL (MAX. kW.)
AIR FLOW
COIL (NOM) [L/s]
UNIT W IGHT / SHIPPING
W IGHT (LBS.) [kg]
UNIT
WIDTH
“W” IN
[mm]
2.3 DIMENSIONS & WEIGHTS (SEE FIGURE 3)
F GURE 3
DMENS ONS AND WE GHTS -- S NGLE CO L UN TS
D MENS ONAL DATA
A-1038-01
NOTE: 24" CL ARANC R QUIR D
IN FRONT OF UNIT FOR FILT R
AND COIL MAINT NANC .
L CTRICAL CONN CTIONS
MAY XIT TOP OR ITH R SID
HIGH VOLTAG CONN CTION 7/8".
1 3/32", 1 31/32" DIA. KNOCK OUTS.
LOW VOLTAG CONN CTION
5/8" AND 7/8" KNOCK OUT
(OUTSID OF CABIN T)
AUXILIARY DRAIN CONN CTION
3/4" F MAL PIP THR AD (NPT)
HORIZONTAL APPLICATION ONLY
PRIMARY DRAIN CONN CTION
3/4" F MAL PIP THR AD (NPT)
AUXILIARY DRAIN CONN CTION
3/4" F MAL PIP THR AD (NPT)
UPFLOW/DOWNFLOW APPLICATION
ONLY
LIQUID LIN CONN CTION
COPP R (SW AT)
VAPOR LIN CONN CTION
COPP R (SW AT)
2111/16
105/16
SUPPLY A R
W
A
H
191/2
R TURN AIR
OP NING
UPFLOW UN T SHOWN;
UN T MAY BE NSTALLED UPFLOW, DOWNFLOW.
HOR ZONTAL R GHT, OR LEFT A R SUPPLY.
RETURN A R OPEN NG D MENS ONS
7
MOD L
SIZ
(-)H2V
UNIT WIDTH
“W” IN. [mm]
UNIT H IGHT
“H” IN. [mm]
MATCH D
TO
OUTDOOR UNIT1ODD* ODD*Normal Normal
1ST STAG 2ND STAG UNIT WITH COIL
(MAX. kW.)
NOMINAL COIL AIRFLOW [L/s] UNIT W IGHT / SHIPPING
W IGHT (LBS.) [kg]
2421HT 21 [533] 421/2[1080] 191/2[495] (-)ARL/(-)ASL-024J C 500 [236] 600 [283] 650 [307] 775 [366] 99/117 [45/51]
3624HT 241/2[622] 551/2[1410] 23 [584] (-)ASL-039J C 725 [342] 825 [389] 975 [460] 1175 [555] 129/146 [59/66]
(-)ARL/(-)ASL-0935J C 825 [389] 950 [448] 1000 [472] 1175 [555]
4824HT 241/2[622] 551/2[1410] 23 [584] (-)ASL-048J C 825 [389] 1000 [472] 1300 [614] 1600 [755] 143/160 [65/72]
(-)ARL-048J C 1000 [472] 1200 [566] 1350 [637] 1600 [755]
6024HT 241/2[622] 551/2[1410] 23 [584] (-)ASL-060J C 925 [437] 1050 [496] 1325 [625] 1700 [802] 159/176 [72/80]
(-)ARL-060J C 1025 [484] 1275 [602] 1400 [661] 1700 [802]
SUPPLY DUCT
“A” IN. [mm]
2417ST 3/8" [9.53] 3/4" [19.05] 171/2" [445] 421/2" [1080] 16" [409] 600 [283] 800 [378] 82/96 [37/44]
3617ST 3/8" [9.53] 3/4" [19.05] 171/2" [445] 421/2" [1080] 16" [409] 1000 [472] 1200 [566] 90/104 [41/47]
3621HT 3/8" [9.53] 7/8" [22.23] 21" [533] 57 [1448] 191/2" [495] 1000 [472] 1200 [566] 135/147 [61/67]
3621MT 3/8" [9.53] 7/8" [22.23] 21" [533] 501/2" [1282] 191/2" [495] 1000 [472] 1200 [566] 126/142 [57/64]
4821MT 3/8" [9.53] 7/8" [22.23] 21" [533] 57 [1448] 191/2" [495] 1400 [661] 1600 [755] 141/153 [64/69]
4821ST 3/8" [9.53] 7/8" [22.23] 21" [533] 501/2" [1282] 191/2" [495] 1400 [661] 1600 [755] 130/146 [59/66]
4824ST 3/8" [9.53] 7/8" [22.23] 241/2" [622] 501/2" [1282] 23" [585] 1600 [755] — 142/160 [64/72]
6021HT 3/8" [9.53] 7/8" [22.23] 21" [533] 57 [1448] 191/2" [495] 1600 [755] 1725 [814] 136/148 [62/67]
6024ST 3/8" [9.53] 7/8" [22.23] 241/2" [622] 551/2" [1410] 23" [585] — 1800 [850] 162/179 [73/81]

8
2.4 RECEIVING
Immediately upon receipt, all cartons and contents should be inspected for transit dam-
age. Units with damaged cartons should be opened immediately. If damage is found, it
should be noted on the delivery papers, and a damage claim filed with the last carrier.
• After unit has been delivered to job site, remove carton taking care not to damage
unit.
• Check the unit rating plate for unit size, electric heat, coil, voltage, phase, etc. to be
sure equipment matches what is required for the job specification.
• Read the entire instructions before starting the installation.
• Some building codes require extra cabinet insulation and gasketing when unit is
installed in attic applications.
• If installed in an unconditioned space, apply caulking around the power wires, control
wires, refrigerant tubing and condensate line where they enter the cabinet. Seal the
power wires on the inside where they exit conduit opening. Caulking is required to
pre-vent air leakage into and condensate from forming inside the unit, control box,
and on electrical controls.
• Install the unit in such a way as to allow necessary access to the coil/filter rack and
blower/control compartment.
• Install the unit in a level position to ensure proper condensate drainage. Make sure
unit is level in both directions within 1/8”.
• Install the unit in accordance with any local code which may apply and the national
codes. Latest editions are available from: “National Fire Protection Association, Inc.,
Batterymarch Park, Quincy, MA 02269.” These publications are:
• ANSI/NFPA No. 70-(Latest dition) National lectrical Code.
• NFPA90A Installation of Air Conditioning and Ventilating Systems.
• NFPA90B Installation of warm air heating and air conditioning systems.
• The equipment has been evaluated in accordance with the Code of Federal
Regulations, Chapter XX, Part 3280.
!WARNING
!NOTICE
mproper installation, or installation not made in accordance with the
Underwriters Laboratory (UL) certification or these instructions, can result
in unsatisfactory operation and/or dangerous conditions and are not cov-
ered by the unit warranty.
Duct leaks can create an unbalanced system and draw pollutants such as
dirt, dust, fumes and odors into the home causing property damage.
Fumes and odors from toxic, volatile or flammable chemicals, as well as
automobile exhaust and carbon monoxide (CO), can be drawn into the liv-
ing space through leaking ducts and unbalanced duct systems causing
personal injury or death (see Figure 1).
• f air-moving equipment or ductwork is located in garages or off-garage
storage areas - all joints, seams, and openings in the equipment and
duct must be sealed to limit the migration of toxic fumes and odors
including carbon monoxide from migrating into the living space.
• f air-moving equipment or ductwork is located in spaces containing fuel
burning appliances such as water heaters or boilers - all joints, seams,
and openings in the equipment and duct must also be sealed to prevent
depressurization of the space and possible migration of combustion
byproducts including carbon monoxide into the living space.
!NOTICE
n compliance with recognized codes, it is recommended that an auxiliary
drain pan be installed under all evaporator coils or units containing evapo-
rator coils that are located in any area of a structure where damage to the
building or building contents may occur as a result of an overflow of the
coil drain pan or a stoppage in the primary condensate drain piping. See
accessories section of these instructions for auxiliary horizontal overflow
pan information (model RXBM).
Carbon Monoxide (CO) Poisoning
Can Cause Severe Injury or Death.
Carbon Monoxide from the exhaust of motor
vehi les and other fuel burning devi es an be
drawn into the living spa e by the operation of the
entral heating and air onditioning system.
Exhaust from motor vehicles, generators, garden
tractors, mowers, portable heaters, charcoal and gas
grills, gasoline powered tools, and outdoor camping
equipment contains carbon monoxide, a poisonous
gas that can kill you. You cannot see it, smell it, or
taste it.
• Do NOT operate an automobile or any engine in a
garage for more than the few se onds it takes to
enter or exist the garage.
• Do NOT operate any fuel-burning devi e in an
en losed or partly en losed spa e, or near build-
ing windows, doors or air intakes.
The U.S. Consumer Product Safety Commission (CPSC)
and Health Canada recommend the installation of UL or
CSA certified Carbon Monoxide Alarm(s) in every home.
▲WARN NG

9
2.5 CLEARANCES
• All units are designed for “0” inches clearance to combustible material on all cabinet
surfaces.
• Units with electric heat require a one inch clearance to combustible material for the
first three feet of supply plenum and ductwork.
• Some units require a combustible floor base depending on the heating kW. The fol-
lowing table should be used to determine these requirements.
Additionally, if these units are installed down-flow, a combustible floor base is
required. See Accessories for Combustible Floor Base RXHB-XX.
Units with electric heating kW equal to or less than the values listed in the table do
not require a combustible floor base.
• Vertical units require clearance on at least one side of the unit for electrical connec-
tions. Horizontal units require clearance on either top or bottom for electrical connec-
tions. Refrigerant and condensate drain connections are made on the front of the unit.
(See Figure 4.)
• All units require 24 inches maximum access to the front of the unit for service.
• These units may be installed in either ventilated or nonventilated spaces.
3.0 APPLICATIONS
3.1 ZONING SYSTEMS
The manufacturer does not currently provide or support zoning. However, zoning systems
can be installed with a variable speed air-handler as long as the zoning equipment manu-
facturers specifications and installation instructions are met and followed.
The preferred zoning method is to use a “bypass” system which is properly installed for
maximum efficiency. In these systems, excess air is routed back through the system to
be used again – this is opposed to a “dump” system in which excess air is routed to a
zone where it is expected that the extra heat or cooling would be least noticed.
If installed as a “bypass” system, the installation must have an optional freeze stat
installed to prevent the coil from icing with excess bypass cooling. Also, if the zoning
equipment manufacturer provides a limit switch (usually provided by the zoning manufac-
turer), this limit must be installed in the system to prevent the furnace from overheating.
F GURE 4
D MENS ONS FOR FRONT CONNECT CO L
41/8
31/16
13/16 11/8
11/16
1
3/8
213/16
51/4
53/8
515/16
Model Cabinet Size 17 21 24
Model Designation kW 15 18 20

10
3.2 VERTICAL UPFLOW AND HORIZONTAL LEFT
The air handler unit is factory shipped for vertical upflow and horizontal left application.
• If return air is to be ducted, install duct flush with floor. Use fireproof resilient gasket 1/8
to 1/4 in. thick between duct, unit and floor. Set unit on floor over opening.
• Support along the length of the unit, on all units installed horizontally. Do not support
or suspend unit from both ends without support in the center of the cabinet. If unit is
to be supported or suspended from corners, run two reinforcing rails length of unit
and support or suspend from reinforcing rails.
• Secondary drain pan kits RXBM- are required when the unit is configured for the hori-
zontal left position over a finished ceiling and/or living space. (See Section 16.0:
Accessories - Kits - Parts.)
3.3 VERTICAL DOWNFLOW AND HORIZONTAL RIGHT
Conversion to Vertical Downflow/Horizontal Right: A vertical upflow unit may be con-
verted to vertical downflow/horizontal right. (See Figure 5.) Remove the door and indoor
coil.
MPORTANT: To comply with certification agencies and the National lectric Code for
horizontal right application, the circuit breaker(s) on field-installed electric heater kits
must be re-installed per procedure below so that the breaker switch “on” position and
marking is up and, “off” position and marking is down.
- To turn breaker(s): Rotate one breaker pair (circuit) at a time starting with the one on the
right. Loosen both lugs on the load side of the breaker. Wires are bundles with wire ties,
one bundle going to the right lug and one bundle going to the left lug.
- Using a screwdriver or pencil, lift white plastic tab with hole away from breaker until
breaker releases from mounting opening (see Figure 6).
- With breaker held in hand, rotate breaker so that “on” position is up, “off” position is down
with unit in planned vertical mounting position. Insert right wire bundle into top right
breaker lug, ensuring all strands of all wires are inserted fully into lug, and no wire insula-
tion is in lug.
F GURE 5
VERT CAL DOWNFLOW & HOR ZONTAL R GHT APPL CAT ONS
CAUTION
Horizontal units must be configured for right hand air supply. Horizontal drain
pan must be located under indoor coil. Failure to use the drain pan can result
in property damage.
DETA L A
NSUR TH R TAIN-
ING CHANN L IS FULLY
NGAG D WITH TH
COIL RAIL.
RAILS
RAILS

11
- Tighten lug as tight as possible while holding circuit breaker. Check wires and make sure
each wire is secure and none are loose. Repeat for left wire bundle in left top circuit
breaker lug.
- Replace breaker by inserting breaker mounting tab opposite white pull tab in opening,
hook mounting tab over edge in opening.
- With screwdriver or pencil, pull white tab with hole away from breaker while setting that
side of breaker into opening. When breaker is in place, release tab, locking circuit break-
er into location in opening.
- Repeat above operation for remaining breaker(s) (if more than one is provided).
- Replace single point wiring jumper bar, if it is used, on line side of breaker and tighten
securely.
- Double check wires and lugs to make sure all are secure and tight. Check to make sure
unit wiring to circuit breaker load lugs match that shown on the unit wiring diagram.
DRIP LOOP: When installing the unit in down-flow or horizontal-right positions, make sure
that the wires coming from the motor form a proper drip loop. This allows water to cascade
off the lowest point of the wiring before it enters the motor head. This may require cutting
the wire tie and installing a new wire tie to form this loop.
• Rotate unit into the downflow position, with the coil compartment on top and the blower com-
partment on bottom.
• The set of coil rails must be moved for vertical down-flow and horizontal right applica-
tion. Remove the coil rail from the factory configuration (6 screws in all). Fastener clear-
ance holes will need to be drilled in the cabinet sides (proper hole locations are marked
with “dimples” for this purpose). Note that the shorter (no notch) coil rail must be mount-
ed on the left-hand side to provide clearance for the drain pan condensate connection
boss.
• Reinstall the indoor coil 180° from original position. nsure the retaining channel is fully
engaged with the coil rail. (See Figure 5, Detail A.)
• Secondary drain pan kits RXBM- are required when the unit is configured for the hori-
zontal right position over a finished ceiling and/or living space. (See Section 16.0:
Accessories - Kits - Parts.)
MPORTANT: Units cannot be installed horizontally laying on or suspended from the
back of the unit.
!WARNING
The RXHB-17, RXHB-21, or RXHB-24 combustible floor base is required when
certain units are applied downflow on combustible flooring. Failure to use the
base can cause a fire resulting in property damage, personal injury or death.
See clearances for units requiring a combustible floor base. See the accessory
section in this manual for combustible floor base RXHB-.
F GURE 6
ROTAT NG C RCU T BREAKER

3.4 INSTALLATION IN AN UNCONDITIONED SPACE
The exterior cabinet of an air handler has a greater risk of sweating when installed in an
unconditioned space than when it is installed in the conditioned space. This is primarily
due to the temperature of the conditioned air moving through the air handler and the air
circulating around the unit where it is installed. For this reason, we recommend the fol-
lowing for all air handler applications, but special attention should be paid to those
installed in unconditioned spaces:
• Duct sizing and airflow are critical and based on the equipment selected
• Supply and return duct attachment: If other than the factory flanges are used, the
attachment of ducting must be insulated and tight to prevent sweating.
• No perimeter supply flanges are provided. If a full perimeter supply duct is used, it is
the responsibility of the installer to provide duct flanges as needed, to secure and seal
the supply duct to prevent air leakage and the sweating that will result.
• All wire penetrations should be sealed. Take care not to damage, remove or com-
press insulation in those cases.
• In some cases, the entire air handler can be wrapped with insulation. This can be
done as long as the unit is completely enclosed in insulation, sealed and service
access is provided to prevent accumulation of moisture inside the insulation.
• As required, use a secondary pan that will protect the structure from excessive sweat-
ing or a restricted coil drain line.
• If a heater kit is installed, be sure the breaker or disconnect cover is sealed tightly to
the door panel.
3.5 INSTALLATION IN MOBILE/MANUFACTURED HOMES
1. Air handler must be secured to the structure using “L” brackets or pipe strap.
2. Allow a minimum of 24 inches (610 mm) front clearance required to access doors.
3. Recommended method for securing air handler:
A. If air handler is against the wall, secure top of air handler to wall stud using two
16ga thick angle brackets one on each side. Attach brackets with No. 10 self-tap-
ping 1⁄2 long screws to air handler and use 5⁄16 lag screws 11⁄2 long to wall stud.
Secure bottom of unit with two 16ga “L” brackets with No. 10 self-tapping 1⁄2 long
screws to air handler and use 5⁄16 lag screws 11⁄2 long to floor.
F GURE 7
NDOOR CO L AND DRA N PAN SET-UP
ST-A1213-01
HORIZONTAL ADAPT R
KIT TOP AIR STOP
STRAPS
VAPOR LIN
CONN CTION
PRIMARY
DRAIN
CONN CTION
LIQUID LIN
CONN CTION
VRTICAL
DRAIN PAN
AUXILIARY
HORIZONTAL
DRAIN
CONN CTION
AUXILIARY
UPFLOW/DOWNFLOW
DRAIN CONN CTION
12

B. If air handler is away from wall attach pipe strap to top of air handler using No. 10
1⁄2 long self-tapping screws on both sides. Angle strap down and away from back
of air handler, remove all slack, and fasten to wall stud of structure using 5⁄16 lag
screws 11⁄2 long. Secure bottom of unit with two 16ga “L” brackets with No. 10
self-tapping screws to air handler and use 5⁄16 lag screws 11⁄2 long to floor.
4.0 ELECTRICAL WIRING
Field wiring must comply with the National lectric Code (C. .C. in Canada) and any
applicable local ordinance.
4.1 POWER WIRING
It is important that proper electrical power is available for connection to the unit model
being installed. See the unit nameplate, wiring diagram and electrical data in the installa-
tion instructions.
• If required, install a branch circuit disconnect of adequate size, located within sight of,
and readily accessible to the unit.
• MPORTANT: After the lectric Heater is installed, units may be equipped with one,
two, or three 60 amp. circuit breakers. These breaker(s) protect the internal wiring in
the event of a short circuit and serve as a disconnect. Circuit breakers installed within
the unit do not provide over-current protection of the supply wiring and therefore may
be sized larger than the branch circuit protection.
• Supply circuit power wiring must be 75°C minimum copper conductors only. See
lectrical Data in this section for ampacity, wire size and circuit protector requirement.
Supply circuit protective devices may be either fuses or “HACR” type circuit breakers.
• Power wiring may be connected to either the right, left side or top. Three 7/8”, 13/32”,
131/32” dia. concentric knockouts are provided for connection of power wiring to unit.
• Power wiring is connected to the power terminal block(s) in unit control compartment.
!WARNING
Disconnect all power to unit before installing or servicing. More than one dis-
connect switch may be required to de-energize the equipment. Hazardous volt-
age can cause severe personal injury or death.
13
F GURE 8
ST-A-1193-01

14
4.3 CONTROL WIRING
MPORTANT: Class 2 low voltage control wire should not be run in conduit with power
wiring and must be separated from power wiring, unless Class 1 wire of proper voltage
rating is used.
• Low voltage control wiring should be 18 AWG color-coded (105°C minimum). For
lengths longer than 100 ft., 16 AWG wire should be used.
• Low voltage control connections are made by extending wires from top of air handler
using wire nuts.
• See wiring diagrams attached to indoor and outdoor sections to be connected
• Do not leave excess field control wiring inside unit, pull excess control wire to outside
of unit and provide strain relief for field control wiring on inside of cabinet at point
wiring penetrates cabinet.
• Make sure, after installation, separation of control wiring and power wiring has been
maintained.
F ELD W RE S ZE FOR 24 VOLT THERMOSTAT C RCU TS
Thermostat Load - Amps
3.0
2.5
2.0
16
16
18
50
14
14
16
100
12
12
14
150
10
12
12
200
10
10
12
250
10
10
10
300
SOL D COPPER W RE - AWG.
Length of Run - Feet (1)
(1) Wire length equals twice the run distance.
NOT : Do not use control wiring smaller than No. 18 AWG between thermostat and outdoor unit.
S
U
P
P
L
Y
W
R
E
L
E
N
G
T
H
F
E
E
T
SUPPLY CIRCUIT AMPACITY
NOT : WIR BAS D ON COPP R CONDUCTORS 75°C MINIMUM RATING.
FOR MOR THAN 3 CONDUCTORS IN A RAC WAY OR CABL , S
N. .C. FOR D RATING TH AMPACITY OF ACH CONDUCTOR.
12
12
14
14
15
10
10
12
12
20
8
10
10
10
25
8
10
10
10
30
8
8
8
8
35
6
8
8
8
40
6
6
8
8
45
6
6
6
6
50
4
6
6
6
60
4
4
4
4
70
3
4
4
4
80
3
3
3
3
90
2
3
3
3
100
2
2
2
2
110
1
1
1
1
125
0
0
0
0
150
00
00
00
00
175
4.2 COPPER WIRE SIZE - AWG. (3% VOLTAGE DROP)
200 [61]
150 [46]
100 [30]
50 [15]

15
w
W2
G
W1
B
ODD
C
R
Air Handler
G
Y
C
R
Single-Stage A/C Thermostat
A/C Outdoor Unit
Y
C
Y2
Y
Field Installed
Line Voltage
-
WIRING INFORMATIO N
Factory Standard
-
W/BL
G/BK
Y
W/BK
BL
G/Y
BR
R
Y/BL
F GURE 9
TYP CAL THERMOSTAT: STRA GHT COOL NG W TH ELECTR C
HEAT
F GURE 10
TYP CAL THERMOSTAT: STRA GHT COOL NG W TH ELECTR C
HEAT AND US NG A HUM D STAT FOR DEHUM D F CAT ON
W2
G
Y
W1
B
ODD
C
R
Air Handler
G
Y
C
R
Single-Stage A/C Thermostat
A/C Outdoor Unit
Y
C
Humidistat
Y2
Field Installed
Line Voltage
-
WIRING INFORMATIO N
Factory Standard
-
W
T STR
AND
W/BL
G/BK
Y
W/BK
BL
G/Y
BR
R
Y/BL
F GURE 11
TYP CAL THERMOSTAT: STRA GHT COOL NG W TH ELECTR C
HEAT US NG A TWO-STAGE FOR DEHUM D FY NG THERMOSTAT
W2
G
Y
W1
B
ODD
C
R
Air Handler
C
R
Two-Stage A/C Thermostat
A/C Outdoor Unit
Y
C
W
G
W2
Y
Y2
Y2
D
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
W/BL
G/BK
Y
W/BK
BL
G/Y
BR
R
Y/BL
*
B
W2
G
Y
W1
B
ODD
C
R
Air Handler
Y
G
W2
E
Heat Pump Thermostat
Heat Pump
Outdoor Unit
Y
B
CR
R
D
C
Y
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
W/BL
G/BK
Y
W/BK
G/Y
BR
BL
R
Y/BL
*
F GURE 12
TYP CAL THERMOSTAT: HEAT PUMP W TH ELECTR C HEAT
F GURE 13
TYP CAL THERMOSTAT: HEAT PUMP W TH ELECTR C HEAT
AND US NG A HUM D STAT FOR DEHUM D F CAT ON
B
W2
G
Y
W1
B
ODD
C
R
Air Handler
Y
G
W2
E
Heat Pump Thermostat
Heat Pump
Outdoor Unit
Y
B
Humidistat
CR
R
D
C
Y2
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
W/BL
G/BK
Y
W/BK
BL
G/Y
BR
R
Y/BL
*
F GURE 14
TYP CAL THERMOSTAT: HEAT PUMP W TH ELECTR C HEAT
US NG A TWO-STAGE THERMOSTAT FOR DEHUM D F CAT ON
B
W2
G
Y
W1
B
ODD
C
R
Air Handler
Y2
G
W
W2
Two-Stage Heat Pump Thermostat
Heat Pump
Outdoor Unit
Y
B
C
R
R
D
C
Y1
Y2
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
W/BL
G/BK
Y
W/BK
BL
G/Y
BR
R
Y/BL
*
4.4 Typi al Thermostat Wiring Diagrams (-)H1V W RE COLOR CODE
BK – BLACK G – GR N PR – PURPL Y – Y LLOW
BR – BROWN GY – GRAY R – R D
BL – BLU O – ORANG W – WHIT
*When using 13kW and higher, it is recommitted to jump
W1 and W2 together for maximum temperature rise. *When using 13kW and higher, it is recommitted to jump W1 and
W2 together for maximum temperature rise.
*When using 13kW and higher, it is recom-
mitted to jump W1 and W2 together for
maximum temperature rise.
*When using 13kW and higher, it is recom-
mitted to jump W1 and W2 together for maxi-
mum temperature rise.
NOTE: These low voltage application diagrams are generic. Your indoor/ outdoor
units may not have all the characteristics shown or may not wire exactly as shown.
Refer to the diagrams and information sent with your indoor/outdoor sections.

16
W2
W1
C
G
Y1
Typical Two-Stage Thermostat
(-)ARL/(-)ASL
Condensing
Unit
Y2
C
R
Y2
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
ODD
R
Y1
Y2GW2
R
Y1
C
L
Y
Y/BL
R
BR
W/R
W1
*
F GURE 15
TYP CAL 2-STAGE THERMOSTAT: 2-STAGE CONDENS NG UN T
W TH ELECTR C HEAT
F GURE 16
TYP CAL TWO-STAGE THERMOSTAT: 2-STAGE CONDENS NG
UN T W TH ELECTR C HEAT US NG A HUM D STAT FOR
DEHUM D F CAT ON*.
W2
W1
C
G
Y1
Typical Two-Stage Thermostat
(-)ARL/(-)ASL
Condensing
Unit
Y2
C
R
Y2
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
ODD
R
Y1
Y2 GW2
R
Y1
C
L
Y
Y/BL
R
BR
W/R
Humidistat
W1
*
F GURE 17
TYP CAL TWO-STAGE THERMOSTAT: 2-STAGE CONDENS NG UN T
W TH ELECTR C HEAT US NG A TWO-STAGE THERMOSTAT W TH
DEHUM D F CAT ON*
W2
W1
C
G
Y1
Typical Two-Stage Thermostat
(-)ARL/(-)ASL
Condensing
Unit
Y2
C
R
Y2
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
ODD
R
Y1
Y2 GW2
R
Y1
C
L
Y
Y/BL
R
BR
W/R
DHM
W1
*
W2
W1
C
G
Y1
Typical Two-Stage Thermostat
(-)ARL/(-)ASL
Condensing
Unit
Y2
C
R
Y2
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
ODD
R
Y1
Y2 GW2
R
Y1
C
L
Y
Y/BL
R
BR
W/R
DHM
L
W1
*
F GURE 18
2-STAGE CONDENS NG UN T W TH ELECTR C HEAT US NG A TWO-
STAGE THERMOSTAT W TH DEHUM D F CAT ON* AND A MALFUNC-
T ON L GHT
W RE COLOR CODE
BK – BLACK G – GREEN PR – PURPLE Y – YELLOW
BR – BROWN GY – GRAY R – RED
BL – BLUE O – ORANGE W – WHITE
S1
S2
S3
S4
S5
S6
S7
S
S1
S2
S3
S4
S5
S6
S7
S
*See Section 5.15 for proper DIP switch selection.
D P SW TCH POS T ONS D P SW TCH POS T ONS
ON
OFF
S1
S2
S3
S4
S5
S6
S7
S
D P SW TCH POS T ONS
S1
S2
S3
S4
S5
S6
S7
S
D P SW TCH POS T ONS
*See Section 5.15 for proper DIP switch selection.
*See Section 5.15 for proper DIP switch selection.
ON
OFF
ON
OFF
ON
OFF
*When using 13Kw and higher, it is recommitted to jump
W1 and W2 together for maximum temperature rise.
*When using 13Kw and higher, it is recommitted to jump
W1 and W2 together for maximum temperature rise.
*When using 13Kw and higher, it is recommitted to jump
W1 and W2 together for maximum temperature rise.
*When using 13Kw and higher, it is recommitted to jump
W1 and W2 together for maximum temperature rise.
4.4 Typi al Thermostat Wiring Diagrams (-)H2V

17
W2
C
R
Single-Stage A/C Thermostat
C
-Field Installed
Line Voltage
WIRING INFORMATION
-Factory Standard
ODD
B
Y1
G
R
Y
C
W1
G
WY
W/BL
G/BK
Y
W/BK
BL
G/Y
BR
R
Y2
Y/BL
F GURE 19
TYP CAL S NGLE-STAGE THERMOSTAT: S NGLE STAGE STRA GHT
COOL NG W TH ELECTR C HEAT
1 ST STAGE A R FLOW
F GURE 20
TYP CAL S NGLE-STAGE THERMOSTAT: S NGLE STAGE STRA GHT
COOL NG W TH ELECTR C HEAT AND US NG A HUM D STAT FOR
DEHUM D F CAT ON
1 ST STAGE A R FLOW
G
W2
C
R
Single-Stage A/C Thermostat
A/C Outdoor Unit
C
Y
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
ODD
B
Y1
WY
R
C
Y
W/BL
Humidistat
G
W1
G/BK
W/BK
BL
G/Y
BR
R
Y2
Y/BL
F GURE 21
TYP CAL S NGLE-STAGE THERMOSTAT: S NGLE STAGE STRA GHT
COOL NG W TH ELECTR C HEAT
2ND STAGE A R FLOW
G
W2
C
R
Single-Stage A/C Thermostat
A/C Outdoor Unit
C
Y
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
ODD
B
Y1
WY
R
C
Y
W/BL
G
W1
G/BK
W/BK
BL
G/Y
BR
R
Y2
Y/BL
G
W2
C
R
Single-Stage A/C Thermostat
A/C Outdoor Unit
C
Y
Field Installed
Line Voltage
-
WIRING INFORMATION
Factory Standard
-
ODD
B
Y1
WY
R
C
Y
W/BL
Humidistat
G
W1
G/BK
W/BK
BL
G/Y
BR
R
Y2
Y/BL
F GURE 22
S NGLE STAGE STRA GHT COOL NG W TH ELECTR C HEAT AND
US NG A HUM D STAT FOR DEHUM D F CAT ON
2ND STAGE A R FLOW
4.4 Typi al Thermostat Wiring Diagrams (-)H2V - ontinued
W RE COLOR CODE
BK – BLACK G – GREEN PR – PURPLE Y – YELLOW
BR – BROWN GY – GRAY R – RED
BL – BLUE O – ORANGE W – WHITE

18
4.5 GROUNDING
• Grounding may be accomplished by grounding metal conduit when installed in accor-
dance with electrical codes to the unit cabinet.
• Grounding may also be accomplished by attaching ground wire(s) to ground lug(s)
provided in the unit wiring compartment.
• Ground lug(s) are located close to wire entrance on left side of unit (upflow). Lug(s)
may be moved to marked locations near wire entrance on right side of unit (upflow), if
alternate location is more convenient.
• Use of multiple supply circuits require grounding of each circuit to lug(s) provided in
unit.
!WARNING
The unit must be permanently grounded. Failure to do so can result in electri-
cal shock causing personal injury or death.
4.6 BLOWER MOTOR ELECTRICAL DATA (-)H1V
MAX MUM
C RCU T
PROTECTOR
M N MUM
C RCU T
AMPAC TY
C RCU T
AMPS
SPEEDSRPMHPHERTZPHASE
VOLTAGE
MODEL
S ZE
(-)H1V
2417ST 208/240 1 60 1/3 300-1100 2 2.2 3 15
3621H/3617ST 208/240 1 60 1/2 300-1100 2 3.1 4.0 15
4821M/6021S/ 208/240 1 60 3/4 300-1100 2 4.0 5.0 15
3621MT/4821ST
6024ST 208/240 1 60 3/4 300-1100 2 4.4 6 15
4.7 BLOWER MOTOR ELECTRICAL DATA (-)H2V
2421HT 1/3 208/230 1 60 300-1100 1.7 4.0 15
3624HT 3/4 208/230 1 60 300-1100 4.9 9.0 15
4824HT 3/4 208/230 1 60 300-1100 4.9 9.0 15
6024HT 3/4 208/230 1 60 300-1100 4.9 9.0 15
(-)H2V HP Voltage Phase Hertz RPM Circuit
AMPS
Minimum
Circuit
Ampacity
Max. Circuit
Protector

19
4.8 CONVENTIONAL 24VAC THERMOSTAT CONTROL WIRING (-)H2V
The (-)ARL/(-)ASL-series of condensing units allow the installer to use conventional
24VAC control wiring and a conventional thermostat for proper unit operation.
MPORTANT: The preferred method of unit installation and operation is by the Comfort
Control2System™, which allows access to the fault history of the system. This diagnos-
tic information is not available when the (-)ARL/(-)ASL unit is using a conventional ther-
mostat. Reference section 7.1 Comfort Control2System™ Control Wiring.
Thermostat control wiring requires a minimum of seven (7) wires for proper unit opera-
tion:
R – 24VAC
C – 24VAC common
G – Constant Fan
W1 – First stage electric heat
W2 – Second stage electric heat
Y1 – First stage operation
Y2 – Second stage operation
Optional wiring:
ODD – On demand humidification
NOTE: W1 and W2 may be jumpered together to energize all the electric heat when a
call for electric heat is received if warmer supply air is desired.
NOTE: When using 24VAC thermostat control wiring, the serial communicating control
will ignore any inputs to Data wire 1 and Data wire 2.
MPORTANT: Class 2 low voltage control wire should not be run in conduit with power
wiring and must be separated from power wiring, unless Class 1 wire of proper voltage
rating is used.
Low voltage control wiring should be 18 AWG color-coded (105°C minimum). For
lengths longer than 100 ft., 16 AWG wire should be used.
Low voltage control connections are made by extending wires from top of air handler
using wire nuts.
See wiring diagrams attached to indoor and outdoor sections to be connected
Do not leave excess field control wiring inside unit, pull excess control wire to outside of
unit and provide strain relief for field wiring on inside of cabinet where wiring penetrates
cabinet.
Make sure, after installation, separation of control wiring and power wiring has been
maintained.

20
4.9 ELECTRIC HEAT ELECTRICAL DATA (-)H1V
HIGH KW ELECTRIC HEAT ELECTRICAL DATA: (-)H1V
RXBH-17?03J 2.25/3.0 1/60 1-3.0 SINGL 10.8/12.5 2.2 17/19 20/20
RXBH-1724?05J 3.6/4.8 1/60 1-4.8 SINGL 17.3/20.0 2.2 25/28 25/30
RXBH-1724?07J 5.4/7.2 1/60 2-3.6 SINGL 26.0/30.0 2.2 36/41 40/45
RXBH-1724?10J 7.2/9.6 1/60 2-4.8 SINGL 34.6/40.0 2.2 46/53 50/60
2417ST 9.4/12.5 1/60 3-4.17 SINGL 45.1/52.1 2.2 60/68 60/70
RXBH-1724A13J 3.1/4.2 1/60 1-4.17 MULTIPL CKT 1 15.0/17.4 2.2 22/25 25/25
6.3/8.3 1/60 2-4.17 MULTIPL CKT 2 30.1/34.7 0 38/44 40/45
RXBH-1724A07C 5.4/7.2 3/60 3-2.4 SINGL 15.0/17.3 2.2 22/25 25/25
RXBH-1724A10C 7.2/9.6 3/60 3-3.2 SINGL 20.0/23.1 2.2 28/32 30/35
RXBH-1724A13C 9.4/12.5 3/60 3-4.17 SINGL 26.1/30.1 2.2 36/41 40/45
RXBH-17?03J 2.25/3.0 1/60 1-3.0 SINGL 10.8/12.5 3.1 18/20 20/20
RXBH-1724?05J 3.6/4.8 1/60 1-4.8 SINGL 17.3/20.0 3.1 26/29 30/30
RXBH-1724?07J 5.4/7.2 1/60 2-3.6 SINGL 26.0/30.0 3.1 37/42 40/45
RXBH-1724?10J 7.2/9.6 1/60 2-4.8 SINGL 34.6/40.0 3.1 48/54 50/60
9.4/12.5 1/60 3-4.17 SINGL 45.1/52.1 3.1 61/69 70/70
RXBH-1724A13J 3.1/4.2 1/60 1-4.17 MULTIPL CKT 1 15.0/17.4 3.1 23/26 25/30
6.3/8.3 1/60 2-4.17 MULTIPL CKT 2 30.1/34.7 0 38/44 40/45
3617ST 10.8/14.4 1/60 3-4.8 SINGL 51.9/60.0 3.1 69/79 70/80
RXBH-1724A15J 3.6/4.8 1/60 1-4.8 MULTIPL CKT 1 17.3/20.0 3.1 26/29 30/30
7.2/9.6 1/60 2-4.8 MULTIPL CKT 2 34.6/40.0 0 44/50 45/50
12.8/17.0 1/60 3-5.68 SINGL 61.6/70.8 3.1 81/93 90/100
RXBH-1724A18J 4.3/5.7 1/60 1-5.68 MULTIPL CKT 1 20.5/23.6 3.1 30/34 30/35
8.5/11.3 1/60 2-5.68 MULTIPL CKT 2 41.1/47.2 0 52/59 60/60
RXBH-1724A07C 5.4/7.2 3/60 3-2.4 SINGL 15.0/17.3 3.1 23/26 25/30
RXBH-1724A10C 7.2/9.6 3/60 3-3.2 SINGL 20.0/23.1 3.1 29/33 30/35
RXBH-1724A13C 9.4/12.5 3/60 3-4.17 SINGL 26.1/30.1 3.1 37/42 40/45
RXBH-1724A15C 10.8/14.4 3/60 3-4.8 SINGL 30.0/34.6 3.1 42/48 45/50
RXBH-1724A18C 12.8/17.0 3/60 3-5.68 SINGL 35.5/41.0 3.1 49/56 50/60
RXBH-1724?05J 3.6/4.8 1/60 1-4.8 SINGL 17.3/20.0 4.0 27/30 30/30
RXBH-1724?07J 5.4/7.2 1/60 2-3.6 SINGL 26.0/30.0 4.0 38/43 40/45
RXBH-1724?10J 7.2/9.6 1/60 2-4.8 SINGL 34.6/40.0 4.0 49/55 50/60
10.8/14.4 1/60 3-4.8 SINGL 51.9/60.0 4.0 70/80 70/80
RXBH-1724A15J 3.6/4.8 1/60 1-4.8 MULTIPL CKT 1 17.3/20.0 4.0 27/30 30/30
7.2/9.6 1/60 2-4.8 MULTIPL CKT 2 34.6/40.0 0.0 44/50 45/50
12.8/17.0 1/60 4-4.26 SINGL 61.6/70.8 4.0 82/94 90/100
RXBH-1724A18J 6.4/8.5 1/60 2-4.26 MULTIPL CKT 1 30.8/35.4 4.0 44/50 45/50
6.4/8.5 1/60 2-4.26 MULTIPL CKT 2 30.8/35.4 0.0 39/45 40/45
3621H RXBH-24A20J 14.4/19.2 1/60 4-48 SINGL 69.2/80 4.0 92/105 100/110
3621MT (31⁄2, 4-ton only) 7.2/9.6 1/60 2-4.8 MULTIPL CKT 1 34.6/40.0 4.0 49/55 50/60
4821ST 7.2/9.6 1/60 2-4.8 MULTIPL CKT 2 34.6/40.0 0.0 44/50 45/50
4821MT 18.0/24.0 1/60 6-4.0 SINGL 86.4/99.9 4.0 113/130 125/150
6021ST RXBH-24A25J 6.0/8.0 1/60 2-4.0 MULTIPL CKT 1 28.8/33.3 4.0 42/47 45/50
4821/6021 only 6.0/8.0 1/60 2-4.0 MULTIPL CKT 2 28.8/33.3 0.0 36/42 40/45
6.0/8.0 1/60 2-4.0 MULTIPL CKT 3 28.8/33.3 0.0 36/42 40/45
RXBH-1724A07C 5.4/7.2 3/60 3-2.4 SINGL 15.0/17.3 4.0 24/27 25/30
RXBH-1724A10C 7.2/9.6 3/60 3-3.2 SINGL 20.0/23.1 4.0 30/34 30/35
RXBH-1724A15C 10.8/14.4 3/60 3-4.8 SINGL 30.0/34.6 4.0 43/49 45/50
RXBH-1724A18C 12.8/17.0 3/60 3-2.84 SINGL 35.6/41.0 4.0 50/57 50/60
RXBH-24A20C* 14.4/19.2 3/60 3-3.2 SINGL 40.0/46.2 4.0 55/63 60/70
(31⁄2, 4-ton only) 7.2/9.6 3/60 3-3.2 MULTIPL CKT 1 20.0/23.1 4.0 30/34 30/35
6021 7.2/9.6 3/60 3-3.2 MULTIPL CKT 2 20.0/23.1 0.0 25/29 25/30
RXBH-24A25C* 18.0/24.0 3/60 6-4.0 SINGL 50.0/57.8 4.0 68/78 70/80
(4-ton only) 9.0/12.0 3/60 3-4.0 MULTIPL CKT 1 25.0/28.9 4.0 37/42 40/45
4821/6021 only 9.0/12.0 3/60 3-4.0 MULTIPL CKT 2 25.0/28.9 0.0 32/37 35/40
A R-HANDLER
MODEL
(-)H1V
HEATER
MODEL
NO.
HEATER
KW
208/240V
PH/HZ
NO.
ELEMENTS
- KW PER
TYPE SUPPLY
C RCU T
S NGLE C RCU T
MULT PLE C RCU T
C RCU T
AMPS.
MOTOR
AMPAC TY
M N MUM
C RCU T
AMPAC TY
MAX MUM
C RCU T
PROTECT ON
nstallation of the UL Listed original equipment manufacturer provided heater kits listed in the following table is recom-
mended for all auxiliary heating requirements.