FEATURING INDUSTRY STANDARD R-410A REFRIGERANT:
(-)H1V Premium Efficiency Single Stage with Aluminum Coil
2
(-)H2V Premium Efficiency Two Stage Comfort Control
(-)H2V with Aluminum Coil
System™
!
▲WARNING
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.
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).
• If 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.
• If 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.
!
WARNING (SEE SECTION 3.2: VERTICAL UPFLOW & HORIZONTAL LEFT)
If unit is to be installed without an indoor coil, return air duct, or plenum, it must
not be in stalled directly over combustible material. If 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.
!
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 serious 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 disconnect switch may be required to de-energize the equipment. Hazardous voltage 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.
!
WARNING (SEE SECTION 14.5: BLOWER ASSEMBLY REMOVAL & REPLACEMENT)
If 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.
Continued on next page ➜
3
Page 4
WARNING
!
PROPOSITION 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 produced by, some of our heating and air-conditioning equipment, or found in natural 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) Insulation
• Carbon Monoxide (CO).
• Formaldehyde
• Benzene
More details are available at the websites for OSHA (Occupational Safety and
Health Administration), at www.osha.gov
(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 present safety and health risks, when improperly used, handled and maintained.
and the State of California’s OEHHA
.
!
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. If 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.
!
WARNING (SEE SECTION 8.0: DUCTWORK)
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
or property damage.
!
WARNING
Because of possible damage to equipment or personal injury, installation, service, and maintenance should be performed by trained, qualified service personnel. Consumer service is recommended only for filter cleaning/ replacement. 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
section in this manual for combustible floor base RXHB-.
for units requiring a combustible floor base. See the accessory
!
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 ➜
4
Page 5
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.
CAUTION (SEE SECTION 14.2: INDOOR COIL - DRAIN PAN - DRAIN LINE)
In 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-.
NOTICE
!
When used on cooling applications, excessive sweating may occur when unit
is installed in an unconditioned space. This can result in property damage.
NOTICE
!
Improper 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 covered by the unit warranty.
NOTICE
!
In 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
accessories section of these instructions for auxiliary horizontal overflow
pan information (model RXBM).
NOTICE
!
Use of this air-handler during construction is not recommended. If operation during construction is absolutely required, the following temporary
installation requirements must be followed:
Installation must comply with all Installation Instructions 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 recommended until construction is completed and the outdoor unit is installed.
• Clean air-handler, duct work, and components including coil upon completion of the construction process and verify proper air-handler operating 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 compressed air is recommended for cleaning elements.
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. Environmental Protection
Agency’s Energy Star Program recommend that central duct systems be checked by a
qualified contractor for proper balance and sealing.
5
Page 6
FIGURE 1
MIGRATION OF DANGEROUS SUBSTANCES, FUMES, AND ODORS INTO LIVING SPACES
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) Electric 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.
MAJOR SERIES
A = FIRST
METERING DEVICE
T = TEVP = PISTON
E = EEV
COIL EFFICIENCY
S = STANDARDH = HIGH
M = MEDIUM
VOLTAGE
A = 115/1/60 J = 208/240/1/50
D = 480/3/60 T = 220/240/1/50
CONTROLS
C = COMMUNICATING
N = NON-COMMUNICATING
(SEE ADS-3803)
BLANK = NONE
MINOR SERIES
A = FIRST
AVAILABLE MODELS
RH1V2417STANJA
RH1V3617STANJA
RH1V3621MTANJA
RH1V4821STANJA
AVAILABLE MODELS
RH2V2421HTACJA
RH2V3624HTACJA
RH2V4824HTACJA
RH2V6024HTACJA
RH1V4824STANJA
RH1V6024STANJA
6
Page 7
2.3 DIMENSIONS & WEIGHTS (SEE FIGURE 3)
FIGURE 3
DIMENSIONS AND WEIGHTS -- SINGLE COIL UNITS
HIGH VOLTAGE CONNECTION 7/8".
1 3/32", 1 31/32" DIA. KNOCK OUTS.
SUPPLY AIR
105/16
ELECTRICAL CONNECTIONS
MAY EXIT TOP OR EITHER SIDE
W
NOTE: 24" CLEARANCE REQUIRED
IN FRONT OF UNIT FOR FILTER
AND COIL MAINTENANCE.
LOW VOLTAGE CONNECTION
5/8" AND 7/8" KNOCK OUT
(OUTSIDE OF CABINET)
Carbon Monoxide from the exhaust of motor
vehicles and other fuel burning devices can be
drawn into the living space by the operation of the
central heating and air conditioning 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 seconds it takes to
enter or exist the garage.
• Do NOT operate any fuel-burning device in an
enclosed or partly enclosed space, or near building 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.
!
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).
• If 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.
• If 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.
Improper 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 covered by the unit warranty.
In 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
accessories section of these instructions for auxiliary horizontal overflow
pan information (model RXBM).
WARNING
NOTICE
!
NOTICE
!
2.4 RECEIVING
Immediately upon receipt, all cartons and contents should be inspected for transit damage. 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 Edition) National Electrical 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.
8
Page 9
2.5 CLEARANCES
41/8
31/16
13/16
11/8
11/16
13/8
213/16
51/4
53/8
515/16
• 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 following table should be used to determine these requirements.
Model Cabinet Size172124
Model Designation kW151820
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
not require a combustible floor base.
• Vertical units require clearance on at least one side of the unit for electrical connections. Horizontal units require clearance on either top or bottom for electrical connections. 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.
FIGURE 4
DIMENSIONS FOR FRONT CONNECT COIL
or less than the values listed in the table do
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 manufacturers 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 manufacturer), this limit must be installed in the system to prevent the furnace from overheating.
9
Page 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 horizontal left position over a finished ceiling and/or living space. (See Section 16.0:
Accessories - Kits - Parts.)
FIGURE 5
VERTICAL DOWNFLOW & HORIZONTAL RIGHT APPLICATIONS
DETAIL A
ENSURE THE RETAIN-
ING CHANNEL IS FULLY
ENGAGED WITH THE
RAILS
COIL RAIL.
RAILS
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.
3.3 VERTICAL DOWNFLOW AND HORIZONTAL RIGHT
Conversion to Vertical Downflow/Horizontal Right: A vertical upflow unit may be converted to vertical downflow/horizontal right. (See Figure 5.) Remove the door and indoor
coil.
IMPORTANT: To comply with certification agencies and the National Electric 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 insulation is in lug.
10
Page 11
FIGURE 6
ROTATING CIRCUIT BREAKER
- 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 breaker 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.
!
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-.
• Rotate unit into the downflow position, with the coil compartment on top and the blower compartment on bottom.
• The set of coil rails must be moved for vertical down-flow and horizontal right application. Remove the coil rail from the factory configuration (6 screws in all). Fastener clearance 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 mounted on the left-hand side to provide clearance for the drain pan condensate connection
boss.
• Reinstall the indoor coil 180° from original position. Ensure 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 horizontal right position over a finished ceiling and/or living space. (See Section 16.0:
Accessories - Kits - Parts.)
IMPORTANT: Units cannot be installed horizontally laying on or suspended from the
back of the unit.
11
Page 12
FIGURE 7
INDOOR COIL AND DRAIN PAN SET-UP
STRAPS
HORIZONTAL ADAPTER
VAPOR LINE
CONNECTION
AUXILIARY
HORIZONTAL
DRAIN
CONNECTION
PRIMARY
DRAIN
CONNECTION
UPFLOW/DOWNFLOW
DRAIN CONNECTION
KIT
AUXILIARY
LIQUID LINE
CONNECTION
TOP AIR STOP
VERTICAL
DRAIN PAN
ST-A1213-01
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 following 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 compress 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 sweating 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.
12
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-
1
⁄2 long screws to air handler and use 5⁄16 lag screws 11⁄2 long to wall stud.
ping
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.
1
⁄2 long
Page 13
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
screws 1
self-tapping screws to air handler and use
FIGURE 8
1
⁄2 long. Secure bottom of unit with two 16ga “L” brackets with No. 10
5
⁄16 lag screws 11⁄2 long to floor.
5
⁄16 lag
ST-A-1193-01
4.0 ELECTRICAL WIRING
Field wiring must comply with the National Electric Code (C.E.C. in Canada) and any
applicable local ordinance.
!
WARNING
Disconnect all power to unit before installing or servicing. More than one disconnect switch may be required to de-energize the equipment. Hazardous voltage can cause severe personal injury or death.
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 installation instructions.
• If required, install a branch circuit disconnect of adequate size, located within sight of,
and readily accessible to the unit.
• IMPORTANT: After the Electric 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
Electrical 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.
7
• Power wiring may be connected to either the right, left side or top. Three
31
/32” dia. concentric knockouts are provided for connection of power wiring to unit.
1
• Power wiring is connected to the power terminal block(s) in unit control compartment.
/8”, 13/32”,
13
Page 14
4.2 COPPER WIRE SIZE - AWG. (3% VOLTAGE DROP)
S
L
U
P
P
L
Y
W
I
R
E
200 [61]
E
150 [46]
N
100 [30]
G
50 [15]
T
H
F
E
E
T
12
12
14
14
15
10
10
12
12
20
8
8
8
6
10
10
10
10
25
8
10
8
10
8
30
35
NOTE: WIRE BASED ON COPPER CONDUCTORS 75°C MINIMUM RATING.
FOR MORE THAN 3 CONDUCTORS IN A RACEWAY OR CABLE, SEE
N.E.C. FOR DERATING THE AMPACITY OF EACH CONDUCTOR.
6
8
6
8
8
8
8
40
45
SUPPLY CIRCUIT AMPACITY
4.3 CONTROL WIRING
IMPORTANT: 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.
50
6
4
4
3
3
2
2
1
0
6
6
4
4
3
3
2
6
6
4
4
3
6
6
4
70
4
80
60
90
3
3
3
100
2
2
110
1
1
1
125
0
0
0
150
00
00
00
00
175
FIELD WIRE SIZE FOR 24 VOLT THERMOSTAT CIRCUITS
SOLID COPPER WIRE - AWG.
3.0
2.5
2.0
Thermostat Load - Amps
(1) Wire length equals twice the run distance.
NOTE: Do not use control wiring smaller than No. 18 AWG between thermostat and outdoor unit.
16
16
18
50
14
14
16
100
12
12
14
150
200
Length of Run - Feet (1)
10
12
12
10
10
12
250
300
10
10
10
14
Page 15
w
W2
G
W1
B
ODD
C
R
Air Handler
G
Y
C
R
Single-Stage A/C The rmos tat
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
W2
G
Y
W1
B
ODD
C
R
Air Handler
G
Y
C
R
Single-Stage A/C The rmostat
A/C Outdoor Unit
Y
C
Humidistat
Y2
Field Installed
Line Voltage
-
WIRING INFORMATIO N
Factory Standard
-
W
W/BL
G/BK
Y
W/BK
BL
G/Y
BR
R
Y/BL
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
C
R
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
*
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
C
R
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
*
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 Typical Thermostat Wiring Diagrams (-)H1V
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.
BK – BLACKG – GREENPR – PURPLEY – YELLOW
BR – BROWNGY – GRAYR – RED
BL – BLUEO – ORANGEW – WHITE
WIRE COLOR CODE
FIGURE 9
TYPICAL THERMOSTAT: STRAIGHT COOLING WITH ELECTRIC
HEAT
FIGURE 11
TYPICAL THERMOSTAT: STRAIGHT COOLING WITH ELECTRIC
HEAT USING A TWO-STAGE FOR DEHUMIDIFYING THERMOSTAT
FIGURE 10
TYPICAL THERMOSTAT: STRAIGHT COOLING WITH ELECTRIC
HEAT AND USING A HUMIDISTAT FOR DEHUMIDIFICATION
FIGURE 12
TYPICAL THERMOSTAT: HEAT PUMP WITH ELECTRIC HEAT
*When using 13kW and higher, it is recommitted to jump
W1 and W2 together for maximum temperature rise.
FIGURE 13
TYPICAL THERMOSTAT: HEAT PUMP WITH ELECTRIC HEAT
AND USING A HUMIDISTAT FOR DEHUMIDIFICATION
*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.
FIGURE 14
TYPICAL THERMOSTAT: HEAT PUMP WITH ELECTRIC HEAT
USING A TWO-STAGE THERMOSTAT FOR DEHUMIDIFICATION
*When using 13kW and higher, it is recommitted to jump W1 and W2 together for
maximum temperature rise.
15
Page 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
Y2
G
W2
R
Y1
C
L
Y
Y/BL
R
BR
W/R
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
G
W2
R
Y1
C
L
Y
Y/BL
R
BR
W/R
Humidistat
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
G
W2
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
G
W2
R
Y1
C
L
Y
Y/BL
R
BR
W/R
DHM
L
W1
*
4.4 Typical Thermostat Wiring Diagrams (-)H2V
BK – BLACK G – GREENPR – PURPLE Y – YELLOW
WIRE COLOR CODE
BR – BROWN GY – GRAYR – RED
BL – BLUEO – ORANGE W – WHITE
FIGURE 15
TYPICAL 2-STAGE THERMOSTAT: 2-STAGE CONDENSING UNIT
WITH ELECTRIC HEAT
*When using 13Kw and higher, it is recommitted to jump
W1 and W2 together for maximum temperature rise.
DIP SWITCH POSITIONS
ON
OFF
S1
S2
S3
S4
S5
S6
S7
S8
FIGURE 16
TYPICAL TWO-STAGE THERMOSTAT: 2-STAGE CONDENSING
UNIT WITH ELECTRIC HEAT USING A HUMIDISTAT FOR
DEHUMIDIFICATION*.
*When using 13Kw and higher, it is recommitted to jump
W1 and W2 together for maximum temperature rise.
*See Section 5.15 for proper DIP switch selection.
DIP SWITCH POSITIONS
ON
OFF
S1
S2
S3
S4
S5
S6
S7
S8
FIGURE 17
TYPICAL TWO-STAGE THERMOSTAT: 2-STAGE CONDENSING UNIT
WITH ELECTRIC HEAT USING A TWO-STAGE THERMOSTAT WITH
DEHUMIDIFICATION*
16
DIP SWITCH POSITIONS
ON
OFF
S1
S2
S3
*When using 13Kw and higher, it is recommitted to jump
W1 and W2 together for maximum temperature rise.
S4
S5
S6
S7
S8
*See Section 5.15 for proper DIP switch selection.
FIGURE 18
2-STAGE CONDENSING UNIT WITH ELECTRIC HEAT USING A TWOSTAGE THERMOSTAT WITH DEHUMIDIFICATION* AND A MALFUNCTION LIGHT
*When using 13Kw and higher, it is recommitted to jump
W1 and W2 together for maximum temperature rise.
*See Section 5.15 for proper DIP switch selection.
DIP SWITCH POSITIONS
ON
OFF
S1
S2
S3
S4
S5
S6
S7
S8
Page 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
W
Y
W/BL
G/BK
Y
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
W
Y
R
C
Y
W/BL
Humidistat
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
W
Y
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
W
Y
R
C
Y
W/BL
Humidistat
G
W1
G/BK
W/BK
BL
G/Y
BR
R
Y2
Y/BL
4.4 Typical Thermostat Wiring Diagrams (-)H2V - continued
WIRE COLOR CODE
BK – BLACK G – GREENPR – PURPLE Y – YELLOW
BR – BROWN GY – GRAYR – RED
BL – BLUEO – ORANGEW – WHITE
FIGURE 19
TYPICAL SINGLE-STAGE THERMOSTAT: SINGLE STAGE STRAIGHT
COOLING WITH ELECTRIC HEAT
1STSTAGE AIR FLOW
FIGURE 20
TYPICAL SINGLE-STAGE THERMOSTAT: SINGLE STAGE STRAIGHT
COOLING WITH ELECTRIC HEAT AND USING A HUMIDISTAT FOR
DEHUMIDIFICATION
1STSTAGE AIR FLOW
FIGURE 21
TYPICAL SINGLE-STAGE THERMOSTAT: SINGLE STAGE STRAIGHT
COOLING WITH ELECTRIC HEAT
2ND STAGE AIR FLOW
FIGURE 22
SINGLE STAGE STRAIGHT COOLING WITH ELECTRIC HEAT AND
USING A HUMIDISTAT FOR DEHUMIDIFICATION
2ND STAGE AIR FLOW
17
Page 18
4.5 GROUNDING
!
WARNING
The unit must be permanently grounded. Failure to do so can result in electrical shock causing personal injury or death.
• Grounding may be accomplished by grounding metal conduit when installed in accordance 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.
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.
IMPORTANT: The preferred method of unit installation and operation is by the Comfort
2
Control
tic information is not available when the (-)ARL/(-)ASL unit is using a conventional thermostat. Reference section 7.1 Comfort Control
Thermostat control wiring requires a minimum of seven (7) wires for proper unit operation:
Optional wiring:
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.
IMPORTANT: 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.
System™, which allows access to the fault history of the system. This diagnos-
2
System™ Control Wiring.
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
ODD – On demand humidification
19
Page 20
4.9 ELECTRIC HEAT ELECTRICAL DATA (-)H1V
Installation of the UL Listed original equipment manufacturer provided heater kits listed in the following table is recommended for all auxiliary heating requirements.
• Electric heater BTUH - (heater watts + motor watts) x 3.414 (see airflow table for motor watts.)
• Supply circuit protective devices may be fuses or “HACR” type circuit breakers.
• Largest motor load is included in single circuit and multiple circuit 1.
• If non-standard fuse size is specified, use next size larger fuse size.
• J Voltage (230V) single phase air handler is designed to be used with single or three phase 230 volt electric heaters. In the case
of connecting 3-phase power to the air handler terminal block without the heater, bring only two leads to the terminal block. Cap,
insulate and fully secure the third lead.
• If the kit is listed under both single and multiple circuits, the kit is shipped from factory as multiple circuits. For single phase application, Jumper bar kit RXBJ-A21 and RXBJ-A31 can be used to convert multiple circuits to a single supply circuit. Refer to
Accessory Section for details.
• The airflow for continuous fan is set 50% of the cooling airflow.
Installation of the UL Listed original equipment manufacturer provided heater kits listed in the table below is
recommended for all auxiliary heating requirements.
• Supply circuit protective devices may be fuses or “HACR” type circuit breakers.
• Largest motor load is included in single circuit and multiple circuit 1.
• If non-standard fuse size is specified, use next size larger fuse size.
• J Voltage (230V) signal phase air handler is designed to be used with single or three phase 230 volt electric heaters. In the case of connecting
3-phase power to the air handler terminal block without the heater, bring only two leads to the terminal block. Cap, insulate and fully secure the
third lead.
• ?Heater Kit Connection Type A=Breaker B=Terminal Block C=Pullout Disconnect
22
Page 23
4.11 HEATER KIT SUPPLEMENTAL INFORMATION (-)H1V & (-)H2V
AIR CONDITIONING DIVISION
(-)HLA-HM4821JA
MARK HEATER INSTALLED/
L’APPAREIL DE CHAUFFAGE DE MARQUE A INSTALLE
If a heater
kit is listed
both
Single
and Multicircuit, the
kit is
shipped
as a Multicircuit and
will
require a
single
Only listed kits can be applied
point kit
Contractor
should “mark
or check” the
left column for
the kit installed
These are the
required maximum and minimum circuit
breaker sizes
for overcurrent
protection and
should not be
confused with
the size of the
breakers
installed in the
heater kit.
Heater Kit Supplemental Information: What allows the manufacturer to use standard Circuit Breakers
up to 60 amps inside the air handler, when using an approved Heater Kit?
National Electric Code (Section 424-22b) and our UL requirements allow us to subdivide heating element
circuits, of less than 48 amps, using breakers of not more than 60 amps and, additionally by, NEC 424-3b, a
rating not less than 125 percent of the load and NEC 424-22c, which describes the supplementary overcurrent protection required to be factory-installed within, or on the heater. The breakers in the heater kit are not,
and have never been, by NEC, intended to protect power wiring leading to the air handler unit. The breakers
in the heating kit are for short circuit protection. All internal unit wiring, where the breakers apply, has been
UL approved for short circuit protection.
Ampacity, (not breaker size), determines supply circuit wire size. The ampacity listed on the unit rating plate
and the Maximum and Minimum circuit breaker size (noted above) or in the units specification sheet or
installation instructions provides the information to properly select wire and circuit breaker/protector size. The
National Electric Code (NEC) specifies that the supply or branch circuit must be protected at the source.
23
Page 24
5.0 AIR HANDLER EQUIPPED WITH ECM
MOTOR INTERFACE CONTROL BOARD (-)H1V
IMPORTANT: Factory switch settings are all “OFF” except switch 9, which is “ON”.
5.1 ECM MOTOR INTERFACE CONTROL AND SETTINGS
IMPORTANT: Disconnect power to air handler when changing DIP switch positions. Even if
blower is not operating, the motor will not recognize changes in DIP switch positions until unit
power is removed and then restored.
The (-)H1V series air handlers have ECM blower motors, which deliver a constant level of airflow over a wide range of external static pressures (up to 1.0" W.C.). The interface board provides the required communications between the thermostat and the ECM blower motor. The
(-)H1V series of air handlers feature:
• An automotive-style ATC blade fuse for transformer protection (3 amp).
9 & 10On-Demand Dehumidification – Active & Passive
There is a bank of 10 DIP switches on the interface board that define the operation of the
ECM motor (see Table 1).
Refer to Figure 23 for switch identification and factory default settings.
NOTE: All units are shipped from the factory on High Airflow.
FIGURE 23
ECM MOTOR FACTORY SETTINGS
24
Page 25
5.2 USING THE ON-BOARD LED TO DETERMINE BLOWER CFM (-)H1V
The (-)H1V interface board LED (see Figure 24) indicates blower output by flashing one (1)
second for every 100 CFM of airflow. The LED will pause 1/10 second between each flash.
After the blower CFM has been displayed, the LED will illuminate dimly for 10 seconds before
repeating the sequence. (See Table 2.)
NOTE: If airflow is not a multiple of 100 CFM, the last LED flash is a fraction of a second of
100 CFM. (Airflow must be verified, flash code is what is set.)
FIGURE 24
IFC BOARD
LED
FUSE
TABLE 2
LED FLASH CODES
INTERFACE
BOARD
DIP SWITCH
SOME EXAMPLES OF
LED OUTPUT
SETTINGS
1200 CFM
600 CFM
950 CFM
• Flashes 12 times
• Illuminate dimly 10 seconds, repeat sequence
• Flashes 6 times
• Illuminate dimly 10 seconds, repeat sequence
• Flashes 9 times, flash once for
1
/2 second
• Illuminate dimly 10 seconds, repeat sequence
5.3 COOLING AND HEAT PUMP HEATING MODE AIRFLOW SETTINGS (-)H1V
(SEE FIGURE 25)
The (-)H1V-series of air handlers allow a wide range of airflow settings for cooling and heat
pump operation. These airflow settings are selected via DIP switches 1 and 2 on the interface
board. DIP switches 1 and 2 allow the user to tailor the airflow for the particular installation.
NOTE: Cooling/heating air-flow adjustments using DIP switches 3 and 4 also affect electric
heat airflow on (-)H1V air-handlers.
25
Page 26
FIGURE 25
FACTORY AIRFLOW SETTINGS FOR SWITCHES 1 AND 2 (-)H1V
2
1
O
N
2
1
O
N
2
1
O
N
O
N
– COOLING AIRFLOW
2
1
NOTE: With no dehumidification;
switch 9 “ON” (factory default)
5.4 COOLING/HEATING AIRFLOW ADJUSTMENTS (-)H1V (SEE FIGURE 25)
Cooling/heating airflow may be adjusted +10% or –10% from nominal airflow using switches 3
and 4.
Refer to Figure 26 for switch positions to achieve the desired adjustments in airflow.
NOTE: Continuous fan speed is NOT affected by switches 3 and 4 selections. Continuous fan
speed is 50% of the selected cooling speed for switches 1 and 2.
IMPORTANT: The use of On Demand Dehumidification overrides the cooling airflow adjust-
ments when high humidity is detected by a dehumidifying thermostat or humidistat when connected to the ODD wire (See Figure 17). Refer to the Cooling Mode Dehumidification section
for more information.
5.5 ELECTRIC HEAT AIRFLOW SETTINGS/ADJUSTMENTS (-)H1V
DIP switches 5 and 6 control electric heat air-flow levels on (-)H1V air-handlers.
FIGURE 26
COOLING AIRFLOW ADJUSTMENTS (-)H1V
4
3
O
N
A
SELECTIONSWITCH 3SWITCH 4AIRFLOW
4
3
O
N
4
3
O
N
4
3
O
N
BCD
POSITIONPOSITIONADJUSTMENT
AOFFOFFNONE
BONOFF10%
COFFON-10%
DONONNONE
COOLING
26
Page 27
S8
S7
S7
S8
On
On Off
On Off
Ramp T imesC F M Re duction
5min utes18% L ess
5to 12.5 minutes12 %Les s
afte r 1 2.5 minutes100% F ull
Operating
Sequence
Pr e - p rogrammed CF M Ra tes
Ramp TimesCFM Reduction
3minutes18%Less
after 3 minutes100% Full
Operating
Sequence
Pre-programmed CFM Rates
Ramp TimesCFM Reduction
3minutes25%Less
3 to 8 m inutes12% Less
after 8 minutes100% Full
Operating
Sequence
Pre-programmed CFM Rates
Off
S7
S8
Factory
S7
onoffonoff
S8
offononoff
Moisture
Removal
Highest
Advanced Cooling Adjustments
Switch 7 and 8 Settings and Characteristics
Standard
Lowest
Good
FIGURE 27
FACTORY AIRFLOW SETTINGS FOR SWITCHES 5 AND 6 (-)H1V
6
5
O
N
6
5
O
N
6
5
O
N
6
5
O
N
ABCD
MINIMUM AIR FLOW PER kW
3 kW to 13 kW=600 min. CFM
15 kW to 18 kW=800 min. CFM
20 kW to 25 kW= 1400 min. CFM
30 kW= 1800 min. CFM
Factory board settings will provide general overall performance under average conditions.
Use these Advanced Profiles to optimize performance and to add soft motor operation.
Please be sure that you check for correct airflow and adjust refrigerant charge based on your
Maximum Capacity and Airflow using the Factory AIRFLOW SETTINGS. Switches 1 and 2
should be set for the tonnage and airflow requirement for the system. Advanced Airflow set-tings will, in most cases, greatly reduce airflow to the system and change the system’s Latent
and Sensible capacity splits. The control board flashes CFM to the nearest 50 CFM calculated. We suggest that trouble-shooting be done with switches in the factory position for
verification of refrigerant charge and airflow through the duct system.
(-)H1V-
6024ST
FIGURE 28
COOLING AIRFLOW ADJUSTMENTS (-)H1V
TABLE 3 (-)H1V
27
Page 28
NOTE: The control is equipped with 3 preprogrammed CFM rates for moisture removal.
These are selected with switches S7 and S8. Please refer to Figure 28 and Table 3 for moisture removal options.
• Multiple Switch Setting CAUTION: Switches 7 and 8 provide dehumidification by using preprogrammed airflow profiles and airflow percentage reductions that reduce airflow based
from selections using switches 3 and 4. Exception: If Minus 10% is selected from switches
3 and 4, the selections of 7 and 8 reduction will be from the nominal CFM selected on 1 and
2. Multiple reductions in airflow will occur that may adversely reduce airflow if 7 and 8 profiles are used with a humidistat or dehumidifying thermostat. CAUTION: If a Humidistat, or
a Thermostat with a Dehumidifying feature, is to be used, leave switches 7 and 8 in the
FACTORY POSITIONS (both in the off position) and skip Advanced Dehumidification
Profiles.
5.8 COOLING MODE DEHUMIDIFICATION – ACTIVE (-)H1V
(Active Dehumidification: ODD senses RH% and adjusts airflow to maintain selected humidity
levels.)
“On Demand Dehumidification”, ODD, terminal input allows the user to have automatic dehumidification in the cooling mode that is controlled by the user’s dehumidifying thermostat or
humidistat setting. When the humidity exceeds the humidistat setting, the airflow is decreased
by a preprogrammed amount. This results in higher latent capacity and increases the level of
comfort.
Use of the On Demand Dehumidification feature is important with the (-)H1V air handlers.
These systems typically have a latent capacity between 23% to 25% of total system capacity.
On Demand Dehumidification drops cooling airflow to boost latent capacity without sacrificing
total system capacity.
The interface board “ODD” terminal input is designed to be used with a dehumidifying thermostat or a traditional humidistat (see Figure 17). For proper operation, the dehumidifying thermostat or humidistat must conform to these conditions:
IMPORTANT: A humidistat can be used for dehumidification as long as it is the type where
the contacts close when the humidity is low. Dehumidistat 41-25066-02 can also be used
since its contacts close when the humidity is low. Other dehumidistats are not compatible with
the interface board. Typical dehumidistats apply a 24V signal when humidity is high and are
incompatible with the interface board.
Refer to the typical thermostat wiring section (See Figures 15-20) for recommended dehumidifying thermostats.
28
Page 29
5.9 ON DEMAND DEHUMIDIFICATION AIRFLOW ADJUSTMENT – ACTIVE
(-)H1V
Use switches 9 & 10 to lower cooling airflow as defined in Figure 29:
FIGURE 29
ON DEMAND DEHUMIDIFICATION AIRFLOW ADJUSTMENT – ACTIVE (-)H1V
10
9
O
N
10
9
O
N
PASSIVE
SELECTION
PASSIVEOFFOFF
ACTIVEOFFON
IMPORTANT: Selection A turns off the input of the ODD terminal. DO NOT USE SELECTION A WITH A DEHUMIDIFYING THERMOSTAT OR HUMIDISTAT (refer to Figure 29).
Selection C: On Demand Dehumidification (See Table 5) – Active
ACTIVE
SWITCH 9SWITCH 10
POSITIONPOSITION
COOLING AIRFLOW ADJUSTMENT
MAXIMUM LATENT REMOVAL
(WITHOUT ODD INPUT)
ON DEMAND DEHUMIDIFICATION1
(WITH ODD INPUT)
TABLE 4
SELECTION A EXPLANATION: MAXIMUM LATENT REMOVAL – PASSIVE (-)H1V
SWITCH POSITIONS
SWITCH 1
POSITION
OFFOFFOFFOFF680102013601530
ONOFFOFFOFF680102013601530
OFFONOFFOFF51085011901360
ONONOFFOFF51085011901360
SWITCH 2
POSITION
SWITCH 9
POSITION
SWITCH 10
POSITION
1
1
⁄2 & 2.0
17/
CABINET SIZE/COOLING CAPACITY
17/
2.0 & 3.0
21/
3.0
CFM
1
3
⁄2 & 4.0
21/
TABLE 5
SELECTION C EXPLANATION: ON DEMAND DEHUMIDIFICATION – ACTIVE (-)H1V
24/
4.0 & 5.0
SWITCH 1
POSITION
SWITCH 2
POSITION
OFFOFFOFFON24VAC800120016001800
ONOFFOFFON24VAC800120016001800
OFFONOFFON24VAC600100014001600
ONONOFFON24VAC600100014001600
TABLE 6
ODD TERMINAL (-)H1V
INDOORINPUT TO “ODD”
AMBIENTTERMINAL
CONDITION(FROM HUMIDISTAT)
HIGH HUMIDITYØ VAC
LOW HUMIDITY24 VAC
SWITCH 9
POSITION
CABINET SIZE/COOLING CAPACITYSWITCH POSITIONS
SWITCH 10
POSITION
ODD
INPUT
17 / 1
1
/2 & 2.0
Y1 Y2
17 / 2.0 & 3.0
21/3.0
Y1 Y2
21 / 3
1
/2 & 4.0
Y1 Y2
24 / 4.0 & 5.0
Y1 Y2
NONE680102013601530
NONE680102013601530
NONE51083011901360
NONE51083011901360
This selection allows On Demand Dehumidification when using a dehumidifying thermostat or humidistat connected to the ODD wire (as shown in Figure 17). Nominal airflow is
reduced by a preprogrammed amount to maximize latent removal.
IMPORTANT: A humidistat or dehumidifying thermostat MUST be connected to the ODD terminal when using this setting.
29
Page 30
5.10 AIRFLOW PERFORMANCE (-)H1V
Airflow performance data is based on cooling performance with a coil and no filter in
place. Select performance table for appropriate unit size, voltage and number of electric
heaters to be used. Make sure external static applied to unit allows operation within the
minimum and maximum limits shown in table below for both cooling and electric heat
operation. For optimum blower performance, operate the unit in the .1 [3 mm] to 1.00
inches [25 mm] W.C. external static range. Units with coils should be applied with a minimum of .1 inch [3 mm] W.C. external static.
*To obtain the nominal airflow 600 CFM for 2417, 1000 CFM for 3617, 1400 CFM for 4821, and 1600 CFM for 4824/6024; the DIP switches 1 and 2 must be set for selection
C or D. See Figure 25.
6.0 AIR HANDLER EQUIPPED WITH THE COMFORT
CONTROL2SYSTEM™ INTERFACE BOARD (-)H2V
FIGURE 30
THE AIR HANDLER COMFORT CONTROL2SYSTEM™ CONTROL BOARD
CONVENTIONAL THERMOSTAT WIRING
The (-)H2V series of air handlers are designed to operate with conventional 24VAC controls or with a serial communicating system.
For the Comfort Control
• Air handler equipped with the Comfort Control
• Condensing unit or heat pump equipped with the Comfort Control2System™.
• A Comfort Control2thermostat
If your equipment does not meet this criteria, you must wire it using conventional 24VAC
thermostat control wiring. Reference Section 4.8.
2
System™, you must have:
2
6.1 COMFORT CONTROL2SYSTEM™ CONTROL WIRING
Comfort Control2System™ requires four (4) control wires for unit operation:
R – 24VAC
C – 24VAC common
1 – Data wire 1
2 – Data wire 2
Wiring sizing for Comfort Control
Note: The Comfort Control
IMPORTANT: When using the Comfort Control
24VAC thermostat wires. If any connections are made to the G, W1, W2, Y1, Y2, or
ODD wires, the serial communicating control will assume the control is being used with a
traditional thermostat and will IGNORE ANY COMMUNICATIONS USING DATA WIRE
1 AND DATA WIRE 2.
IMPORTANT: 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.
• The four 18AWG low voltage control wires must be installed from the thermostat to the
indoor unit and from indoor unit to the outdoor unit. The wire length between the thermostat and indoor unit should not be greater than 100 feet. The wire length between
the indoor unit and outdoor unit should not be greater than 125 feet.
• 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 at point wiring penetrates cabinet.
• Make sure, after installation, separation of control wiring and power wiring has been
maintained.
2
is identical to systems using low voltage 24V wires.
2
System™ requires a minimum 18 AWG.
2
, do not make any connections to the
32
Page 33
6.2 COMFORT CONTROL2SYSTEM™ CONTROL BOARD (-)H2V
Indoor Unit
1
2
C
R
WIRING INFORMATION
Line Voltage
–Field Installed - - - - - –Factory Standard
1
2
R
C
1
2
R
C
Communicating Thermostat
Outdoor Unit
FIGURE 31
TYPICAL COMFORT CONTROL2SYSTEM™ WIRING DIAGRAM
The (-)H2V series air handler control, Figure 30, has the following features:
• Memory Card – The memory card stores all information needed for unit operation.
Once the system is wired for the Comfort Control
thermostat and outdoor unit. This shared data is available if one of the components in
the system needs to be replaced.
• An automotive-style ATC blade fuse for transformer protection (3 amp).
• An on-board LED to indicate blower CFM.
• An RJ-11 port for use with a diagnostic tool.
• Inputs for field installed supply and return air temperature sensors (available in kit
RXHT-A01)
• DIP switches for airflow adjustments
IMPORTANT: The DIP switches are NOT used when the air handler is wired for the
Comfort Control
2
. Airflow adjustments are performed via the thermostat or a diagnostic
tool.
Installation Verification
• Term and bias dip switches should be on.
• 24V AC power on R&C must be present at the control for the air handler to operate,
reference Figure 31.
• Line voltage must be present at the control for indoor blower operation.
• The RX Data LED will flash green in normal operation. A flashing green light indicates
24VAC is present and the data wires 1 and 2 are wired properly.
IMPORTANT: If the RX DATA LED is solid green, data wire 1 and data wire 2 are not
properly connected. Typically, the connections are switched, i.e. data wire 1 is wired to
the data wire 2 connection and data wire 2 is wired to the data wire 1 connection.
Verify wiring and correct the polarity at the two data wires.
IMPORTANT: Diagnostic port is not a phone jack. Connecting to a telephone or tele-
phone system will result in damage.
IMPORTANT: Diagnostic port is for diagnostic tool only. Do not attempt to connect
components using a telephone cord. Damage will occur.
2
, this information is shared with the
CONVENTIONAL THERMOSTAT WIRING
6.3 USING THE ON-BOARD LED TO DETERMINE BLOWER CFM (-)H2V
The CFM LED indicates blower output by flashing one (1) flash for every 100 CFM of airflow. The LED will pause 1/10 second between each flash. (See Table 1.)
6.4 AIRFLOW ADJUSTMENTS WITH THE COMFORT CONTROL2SYSTEM™
(-)H2V
The RHPN air handler Comfort Control2System™ may operate using the Comfort
2
Control
Comfort Control
Control
or via traditional thermostat wiring. When the air handler is wired for the
2
control have NO affect on the airflow.
IMPORTANT: When using the Comfort Control
airflow or on air handler performance.
2
using Data wire 1 and Data wire 2, the DIP switches on the Comfort
2
, the DIP switches have no affect on
33
Page 34
6.5 COOLING AIRFLOW SETTINGS (BY TONNAGE) (-)H2V
The (-)H2V-series of air handlers automatically set cooling airflow when using the
Comfort Control
and sets airflow for optimum performance and comfort. Refer to Table 1 for the airflow
provided when the (-)H2V air handler is matched to the RARL/RASL condensing units.
TABLE 7
RHPN AIRFLOW WHEN MATCHED TO THE (-)ASL CONDENSING UNITS (-)H2V
2
. The air handler detects the tonnage of the condensing unit/heat pump
The Comfort Control2does allow the installer to tweak the cooling airflow +/-10% to suit
the installation. When using the Comfort Control
adjusted using the Comfort Control
2
thermostat or a service tool. To adjust the airflow,
go to the airflow adjustment menu and select the desired adjustment. (Refer to Table 2).
TABLE 8
AIRFLOW ADJUSTMENT SELECTION TABLE (-)H2V
2
System™, the airflow can only be
CONVENTIONAL THERMOSTAT WIRING
Selection
None
+10%
–10%
IMPORTANT: Cooling airflow adjustment is accessible via the Comfort Control
mostat or via a service tool. Refer to their instructions to access the cooling airflow
adjustment menu.
NOTE: Cooling airflow adjustments are in effect for cooling operation only. They are
ignored when in heating mode or when electric heat is activated.
2
ther-
6.7 ELECTRIC HEAT AIRFLOW (-)H2V
The H2V-series of air handlers are factory programmed to provide adequate airflow for
the maximum electric heat (auxiliary heat) allowed for a given model. Airflow adjustment
for lower KW heater applications is accessible via the Comfort Control
stat or via a service tool. Refer to their instructions to access the “Heating Airflow
Adjustment” menu.
TABLE 9
ELECTRIC HEAT AIRFLOW FOR THE RHPN AIR HANDLERS (-)H2V
The Comfort Control2control is shipped with “On Demand Dehumidification” (ODD)
turned OFF. On Demand Dehumidification may be activated when the serial communicating thermostat has an on-board humidity sensor.
2
IMPORTANT: On Demand Dehumidification is accessible via the Comfort Control
thermostat or via a service tool. Refer to their instructions to access the ODD airflow adjustment menu.
6.9 COOLING DELAY PROFILES (-)H2V
The (-)H2V air handler is factory configured with optimum ON/OFF delays to maximize
energy efficiency and comfort. In certain situations, the installer may choose an alternate
profile to tweak the system operation for the building load and to maximize comfort. The
alternate profiles are defined below:
IMPORTANT: On Demand Dehumidification, ODD, is the preferred method to maximize
comfort with little or no loss of energy efficiency. If using ODD, do NOT use any of the
alternate profiles. Only use the factory default profile. Use of the alternate profiles with
ODD will decrease energy efficiency with no gain in comfort.
The Quiet Start profile is configured to bring the blower up to 50% airflow for 30 seconds
before advancing to 100% airflow. This minimizes air flow sounds at system startup.
The humid profile is configured to run the blower at 80% airflow for about the first four
minutes of system operation to remove more moisture from the conditioned space.
6.10 USING THE ON-BOARD LED TO DETERMINE BLOWER CFM (-)H2V
The (-)H2V interface board LED indicates blower output by flashing once for every 100
CFM of airflow. The LED will pause 1/10 second between each flash. (See Table 2.)
6.11 COOLING AIRFLOW SETTINGS
FIGURE 32
DIP SWITCH SETTING FOR COOLING AIRFLOW (-)H2V
When not using the Comfort Control2System™, the (-)H2V air handler must be configured to deliver the proper airflow. Adjust DIP switches 1 and 2 per these tables for proper unit operation:
TABLE 11
AIRFLOW SETTINGS WHEN USING TRADITIONAL 24VAC THERMOSTAT (-)H2V
*6.12 COOLING AIRFLOW ADJUSTMENTS WITH SINGLE STAGE
CONDENSING UNITS
The (-)H2V series of air handlers can be used with select single-stage condensing units.
Refer to the Engineering Specifications Sheets to determine the required airflow for your
particular combination. Refer to Table 5 to determine the air-flows available for each
(-)H2V air handler. Reference Figures 27-30 for proper wiring of the system.
Page 37
6.13 AIRFLOW ADJUSTMENT (-)H2V (TRIM)
FIGURE 33
DIP SWITCH SETTING FOR AIRFLOW ADJUSTMENTS
When not using the Comfort Control2System™, the (-)H2V air handler cooling airflow
can be tweaked +/-10% to suit the installation. To adjust the airflow, adjust DIP switches
5 and 6 per this table:
IMPORTANT: The DIP switches are active only when using conventional a 24VAC thermostat. If using the Comfort Control
2
System™, refer to Section 5.4 for adjusting air-
flows.
NOTE: Airflow adjustment is active for cooling operation only. Cooling airflow adjust-
ments are ignored when electric heat is activated.
6.14 ELECTRIC HEAT AIRFLOW
The RHPN-series air handlers are shipped with the “Low KW airflow” feature turned OFF.
Activate lower airflow feature for lower KW electric heat applications by turning DIP switch
8 ON.
IMPORTANT: The DIP switches are active only when using a conventional 24VAC thermostat. If using the Comfort Control
flow adjustment.
2
System™, refer to section 5.5 for low KW heat air-
CONVENTIONAL THERMOSTAT WIRING
ELECTRIC HEAT AIRFLOW FOR THE RHPN AIR HANDLERS (-)H2V
The (-)H2V series air handler is shipped with “On Demand Dehumidification” (ODD)
O
Normal Humidity Result
A 24VAC signal is applied to
the ODD terminal
Full rated airflow is delivered
by the blower
O
High Humidity Result
No signal applied to the ODD
terminal
Airflow is reduced by a preset
amount to increase latent
capacity
turned OFF. On Demand Dehumidification is used in conjunction with a traditional
24VAC thermostat equipped with an on-board humidity sensor. Activate ODD by turning
DIP switch 7 ON. ODD operation is controlled by the indoor humidity sensed at the thermostat. Operation is:
Normal Humidity (humidity BELOW the thermostat set point):
High Humidity (humidity ABOVE the thermostat set point):
The (-)H2V air handler is programmed to provide maximum efficiency and optimum
humidity removal. When high humidity is detected, the air handler reduces cooling airflow defined in Table 6.
IMPORTANT: The DIP switches are active only when using conventional a 24VAC ther-
mostat. If using the Comfort Control
flows.
NOTE: ODD airflow adjustments are active for cooling operation only. They are ignored
CONVENTIONAL THERMOSTAT WIRING
when the heat pump is in heating mode or when electric heat is activated.
6.16 COOLING DELAY PROFILES (-)H2V
Cooling delay profiles are not available when the H2V air handler is controlled using a
conventional 24VAC thermostat. These profiles are available only when the air handler
is wired for the Comfort Control
Cooling Delay Profiles.
38
2
System™, refer to Section 5.4 for adjusting air-
2
System™. Refer to Section 5.4 for the Comfort Control
IMPORTANT: Observe airflow operating limits. Do not operate above 1.0 in. W.C. system external static.
2421HT
(-)ASL-039
11x11
3/4
1000
1600
950
11x11
Outdoor Unit
(-)ASL-025
or
(-)ARL-025
or
(-)ARL-038
(-)ASL-037
775
First Stage
(Y1)
Second
Stage
(Y2)
10x8
1/3
600
775
775775800800825825
150170135185
825825825
115140165185210240265290
3624HT
24
320
1150115011751175117511501150
1200
1600
1125
1175
11501125
4824HT
(-)ARL-049
(-)ASL-048
6024HT
(-)ARL-061
(-)ASL-060
24
3/4
24
11x11
3/4
First Stage
(Y1)
First Stage
(Y1)
First Stage
(Y1)
First Stage
(Y1)
First Stage
(Y1)
First Stage
(Y1)
Second
Stage
(Y2)
Second
Stage
(Y2)
Second
Stage
(Y2)
Second
Stage
(Y2)
Second
Stage
(Y2)
Second
Stage
(Y2)
6.17 AIRFLOW PERFORMANCE DATA (-)H2V
CONVENTIONAL THERMOSTAT WIRING
6.18 AIR HANDLER DIAGNOSTIC CODES (-)H2V
Descriptions of the air handler Comfort Control2diagnostic codes are provided below.
These codes can be displayed at the thermostat or via a diagnostic tool.
IMPORTANT: Air handler diagnostic codes are available at the thermostat when the
system is wired for the Comfort Control
lowing diagnostic codes.
2
. If using the Comfort Control2, refer to the fol-
39
Page 40
6.18 AIR HANDLER DIAGNOSTIC CODES (-)H2V (continued)
T
T
T
T
T
T
T
T
T
T
T
T
T
T
Descriptions of the ICC diagnostic codes are provided below:
7-Segment
LEDs Display
Code
d1 – No Shared Data
The control board does not have shared data.
d3 – Airflow CFM Mismatch
The air handler cannot supply the required
airflow for proper system operation
d4 – (Device) Memory Card Invalid for
Device
The memory card is missing or the data in the
memory card does not match the data in the
control.
d5 – Card Hardware Conflict
The motor horsepower is not correct for the
air handler
d6 – BLWR HP CNFLCT
Blower Horsepower conflict
The horsepower data in the memory card
does not match the motor horsepower.
CONVENTIONAL THERMOSTAT WIRING
40
7
0
d7 – BLWER MFG CNFLCT
The System does not have any data on the
installed motor.
d8 – Old Shared Data
System data is obsolete
60 – BLWR FLT–RUN
The ECM motor is running but has a
fault
61 – BLWR FLT–NO RUN
The ECM motor is not operating
68 – ECM No Signal
The ECM motor is not communicating to
the air handler control board.
81 – Return Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
82 – Supply Air Sensor Out of Range
The resistance of the sensor out of range for
normal operation.
93 – Internal Control Fault
The air handler control is not functioning.
Diagnostic Description
Status/Possible Cause – Troubleshooting
• Replace memory card with correct system
information
• Misapplied/wrong indoor air mover – replace
with properly sized air handler/furnace.
• Check memory card to ensure it matches
device
• Check if memory card is present
• Replace the air handler motor with the correct
horsepower motor.
• Replace the memory card with correct system
information.
• Replace the motor with correct horsepower
motor.
• Replace the memory card with correct system
information. Check memory card to ensure
it matches device
• Replace the memory card with correct system
information.
• If system will not operate, order new memory
card to update system information.
• TEST the ECM for proper operation.
• Make sure the ECM motor wiring harness is
plugged into the ECM motor and control board.
• Test the ECM motor for proper operation.
• Make sure the ECM motor wiring harness is
plugged into the ECM motor and control
board.
• Test the ECM motor for proper operation using
a service tool.
• Make sure the sensor is plugged into the air
handler control board.
• Check the resistance of the sensor. Replace if
it is out of tolerance.
• Make sure the sensor is plugged into the air
handler control board.
• Check the resistance of the sensor. Replace if
it is out of tolerance.
• Check control for proper system operation.
• Replace control
Information
Page 41
7.0 DUCTWORK
Field ductwork must comply with the National Fire Protection Association NFPA 90A,
NFPA 90B and any applicable local ordinance.
!
WARNING
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 or property damage.
Sheet metal ductwork run in unconditioned spaces must be insulated and covered with a
vapor barrier. Fibrous ductwork may be used if constructed and installed in accordance
with SMACNA Construction Standard on Fibrous Glass Ducts. Ductwork must comply
with National Fire Protection Association as tested by U/L Standard 181 for Class I Air
Ducts. Check local codes for requirements on ductwork and insulation.
• Duct system must be designed within the range of external static pressure the unit is
designed to operate against. It is important that the system airflow be adequate. Make
sure supply and return ductwork, grills, special filters, accessories, etc. are accounted
for in total resistance. See airflow performance tables in this manual.
• Design the duct system in accordance with “ACCA” Manual “D” Design for Residential
Winter and Summer Air Conditioning and Equipment Selection. Latest editions are
available from: “ACCA” Air Conditioning Contractors of America, 1513 16th Street,
N.W., Washington, D.C. 20036. If duct system incorporates flexible air duct, be sure
pressure drop information (straight length plus all turns) shown in “ACCA” Manual
“D” is accounted for in system.
• Supply plenum is attached to the 3/4” duct flanges supplied on the unit around the
blower outlet. Flanges are flat for shipping purposes and must be bent up along perforated edge around blower opening. Be sure to bend flanges completely up so they do
not interfere with air being discharged from blower.
IMPORTANT: Flanges around blower opening for attaching supply duct must be up out
of blower discharge even if not used so they do not restrict airflow from blower.
IMPORTANT: If an elbow is included in the plenum close to the unit, it must not be
smaller than the dimensions of the supply duct flange on the unit.
• Some units with electric heaters require 1 in. clearance to supply plenum and branch
ducts to combustible material for the first 3 feet from the unit. See CLEARANCES.
• A 3/4” return duct flange is supplied on all sides of the air inlet opening of the unit coil
casing. If the unit is to be installed without a coil casing (no indoor coil), a 3/4”flange is
supplied on the back and sides of the air inlet opening of the blower casing. No flange
is provided on the front of the opening to the blower casing. If return duct is attached
to the inlet of the blower casing, the front flange of the duct should be run up into the
opening or 90° brake made on the front flange to tape to the front of the blower casing.
• IMPORTANT: The front flange on the return duct if connected to the blower casing
must not be screwed into the area where the power wiring is located. Drills or sharp
screw points can damage insulation on wires located inside unit.
• Return duct flanges on blower or coil casing are flat for shipping purposes and must
be bent out along perforated edge around opening.
• Secure the supply and return ductwork to the unit flanges, using proper fasteners for
the type of duct used and tape the duct-to-unit joint as required to prevent air leaks.
41
Page 42
8.0 REFRIGERANT CONNECTIONS
Keep the coil connections sealed until refrigerant connections are to be made. See the
Installation Instructions for the outdoor unit for details on line sizing, tubing installation,
and charging information.
Coil is shipped with a low (5 - 10 PSIG) pressure charge of dry nitrogen. Evacuate the
system before charging with refrigerant.
Install refrigerant tubing so that it does not block service access to the front of the unit.
Nitrogen should flow through the refrigerant lines while brazing.
Make sure to protect TXV, copper to aluminum joint, and service valves from overheating
by use of wet rag or some type of shielding. Double tip torches are not recommended.
Use a brazing shield to protect the cabinet’s paint from being damaged by torch flames.
After the refrigerant connections are made, seal the gap around the connections with
pressure sensitive gasket. If necessary, cut the gasket into two pieces for a better seal.
8.1 TEV SENSING BULB
IMPORTANT: DO NOT perform any soldering with the TEV bulb attached to any line.
After soldering operations have been completed, clamp the TEV bulb securely on the
suction line at the 10 to 2 o’clock position with the strap provided in the parts bag.
Insulate the TEV sensing bulb and suction line with the provided pressure sensitive
insulation (size 4” x 7”) and secure with provided wire ties.
IMPORTANT: TEV sensing bulb should be located on a horizontal section of suction
line, just outside of coil box.
FIGURE 35
BULB LOCATION
10 O’CLOCK2 O’CLOCK
BULB
VAPOR LINE
BULB
42
Page 43
FIGURE 36
BULB LOCATION
8.2 CONDENSATE DRAIN TUBING
Consult local codes or ordinances for specific requirements.
IMPORTANT: When making drain fitting connections to the drain pan, use a thin layer
of Teflon paste, silicone or Teflon tape and install hand tight.
IMPORTANT: When making drain fitting connections to drain pan, do not overtighten.
Overtightening fittings can split pipe connections on the drain pan.
• Install drain lines so they do not block service access to front of the unit. Minimum
clearance of 24 inches is required for filter, coil or blower removal and service access.
• Make sure unit is level or pitched slightly toward primary drain connection so that
water will drain completely from the pan. (See Figure 20.)
• Do not reduce drain line size less than connection size provided on condensate drain
pan.
• All drain lines must be pitched downward away from the unit a minimum of 1/8” per
foot of line to ensure proper drainage.
• Do not connect condensate drain line to a closed or open sewer pipe. Run condensate to an open drain or outdoors.
• The drain line should be insulated where necessary to prevent sweating and damage
due to condensate forming on the outside surface of the line.
• Make provisions for disconnecting and cleaning of the primary drain line should it
become necessary. Install a 3 in. trap in the primary drain line as close to the unit as
possible. Make sure that the top of the trap is below connection to the drain pan to
allow complete drainage of pan (See Figure 37).
• Auxiliary drain line should be run to a place where it will be noticeable if it becomes
operational. Occupant should be warned that a problem exists if water should begin
running from the auxiliary drain line.
• Plug the unused drain connection with the plugs provided in the parts bag, using a
thin layer of teflon paste, silicone or teflon tape to form a water tight seal.
• Test condensate drain pan and drain line after installation is complete. Pour water
into drain pan, enough to fill drain trap and line. Check to make sure drain pan is
draining completely, no leaks are found in drain line fittings, and water is draining
from the termination of the primary drain line.
8.3 DUCT FLANGES
Field-installed duct flanges (4 pieces) are shipped with units. Install duct flanges as
needed on top of the unit. (See Figure 3.)
43
Page 44
FIGURE 37
CONDENSATE DRAIN TRAP
DO NOT OPERATE UNIT WITHOUT
CONDENSATE DRAIN TRAP.
UNIT
3''
3''
DO NOT OVERTIGHTEN DRAIN FITTING
UNIT MUST BE SLIGHTLY INCLINED
TOWARD DRAIN CONNECTION.
9.0 AIR FILTER (Not Factory-Installed)
If a remote filter is installed, it should be sized for a maximum of 300 feet/min. air velocity for the CFM required.
IMPORTANT: Do not operate system without a filter. A filter is required to protect the
coil, blower and internal parts from excessive dirt and dust.
10.0 SEQUENCE OF OPERATION
10.1 Cooling (cooling only or heat pump)
• When the thermostat “calls for cooling,” the circuit between R, G and Y is completed,
causing the blower to energize. This circuit also closes the contactor (CC) in the outdoor unit starting the compressor (COMP) and outdoor fan motor (OFM).
10.2 Heating (electric heat only)
• When the thermostat “calls for heat,” the circuit between R and W1is completed, and
the heater sequencer (HR
elements (HE) and the indoor blower motor (IBM) will come on. Units with a second
heater sequencer (HR
thermostat sub-base or connected to a second stage W
W
on the furnace board MUST be connected for heating blower operation.
1
10.3 Heating (heat pump)
• When the thermostat “calls for heat,” the circuits between R and G are completed.
Circuit R and B energizes the reversing valve (RV) switching it to the heating position
(remains energized as long as system switch is in “heat” position). Circuit R and Y
energizes the contactor (CC) starting the outdoor fan motor (OFM), compressor
(COMP), and the indoor blower motor (IBM).
• If the room temperature should continue to fall, circuit R and W
second-stage heat room thermostat. Circuit R-W
The completed circuit will energize supplemental electric heat. Units with a second
heater sequencer (HR
stat or connected to a third heating stage W
the thermostat indicates when supplemental heat is being energized.
) is energized. A time delay will follow then: The heating
1
) can be connected with the first sequencer (HR1) to W on the
2
2 energizes a heat sequencer (HR1).
2) can be connected with first sequencer (HR1) to W2 on thermo-
3 on the thermostat sub-base. A light on
on the sub-base.
2
2 is completed by the
44
10.4 DEFROST
• For sequence of operation for defrost controls, see outdoor heat pump installation
instructions.
• Supplemental heat during defrost can be provided by connecting the purple (PU) pigtail in the outdoor unit to P on the indoor unit control board. This will complete the circuit between R and W through a set of contacts in the defrost relay (DR) when the
outdoor heat pump is in defrost. This circuit, if connected, will temper air being discharged from the indoor unit during defrost.
Page 45
• Defrost heat control (DHC) is wired in series in the circuit described above on units
where the supplemental heat is more than would be required to offset the defrost
cooling capacity. Defrost heat control (DHC) is provided on the same models
described above having watt restrictors.
• When the outdoor unit goes into defrost, the circuit between R and W is completed
through a set of contacts on the defrost relay (DR) in series with the contacts on the
defrost heat control (DHC). Purple (PU) pigtails on the indoor unit and outdoor units
must be connected to make circuit. During defrost, the defrost heat control (DHC)
senses the air temperature leaving the indoor unit and cycles the supplemental electric heat to maintain comfort (75° to 85°) air temperature and prevent objectionable
cold air during defrost. This limits the electric heat output to the minimum required, to
conserve energy and prevent the thermostat from being satisfied with electric heat
and preventing completion of the defrost cycle.
• For most economical operation, if cold air is not of concern during defrost, the purple
wire can be left disconnected. Supplemental heat will only be energized by a call from
second stage room thermostat.
10.5 EMERGENCY HEAT (Heating of Heat Pump)
• If selector switch on thermostat is set to the emergency heat position, the heat pump
will be locked out of the heating circuit, and all heating will be electric heat. Jumper
should be placed between W
2 and E on the thermostat sub-base so that the electric
heat control will transfer to the first stage heat on the thermostat. This will allow the
indoor blower to cycle on and off with the electric heat when the fan switch is in the
auto position.
10.6 ROOM THERMOSTAT (ANTICIPATOR SETTING)
See instructions with outdoor section, condensing unit or heat pump for recommended
room thermostats.
• On units with one electric heat sequencer (HR
anticipator setting should be .16.
• On units with two electric heat sequencers (HR
heat anticipator setting should be .32 if both are connected to same stage on thermostat. Setting should be .16 if (HR
1 &HR2) are connected to separate stages.
NOTE: Some thermostats contain a fixed, non-adjustable heat anticipator. Adjustment is
not permitted.
• The thermostat should be mounted 4 to 5 feet above the floor on an inside wall of the
living room or a hallway that has good air circulation from the other rooms being controlled by the thermostat. It is essential that there be free air circulation at the location
of the same average temperature as other rooms being controlled. Movement of air
should not be obstructed by furniture, doors, draperies, etc. The thermostat should
not be mounted where it will be affected by drafts, hot or cold water pipes or air ducts
in walls, radiant heat from fireplace, lamps, the sun, T.V. or an outside wall. See
instruction sheet packaged with thermostat for mounting and installation instructions.
NOTE: Some thermostats, particularly solid-state digital types, contain fixed, nonadjustable heat anticipators and adjustment is not permitted.
1) (see wiring diagram on unit), heat
1 & HR2) (see wiring diagram on unit),
11.0 CALCULATIONS
11.1 CALCULATING TEMPERATURE RISE
• The formula for calculating air temperature rise for electric resistance heat is:
• The formula for calculating airflow using temperature rise and heating BTUH for units
with electric resistance heat is:
CFM =
Heating BTUH
1.08 x Temp. Rise
11.4 CALCULATING CORRECTION FACTOR
• For correction of electric heat output (kW or BTUH) or temperature rise at voltages
other than rated voltage multiply by the following correction factor:
Correction Factor =
Applied Voltage
Rated Voltage
2
2
12.0 PRE-START CHECKLIST
PRE-START CHECKLIST
❍
YES
❍ NO
❍ YES
❍ NO
❍ YES
❍ NO
❍ YES
❍ NO
Is unit properly located, level, secure and serviceable?
Has auxiliary pan been provided under the unit with
separate drain? (Units installed above a finished
ceiling).
Is condensate line properly sized, run, trapped,
pitched and tested?
Is ductwork correctly sized, run, taped and insulated?
❍ YES
❍ NO
❍ YES
❍ NO
❍ YES
❍ NO
❍ YES
❍ NO
❍ YES
❍ NO
❍ YES
❍ NO
❍ YES
❍ NO
❍ YES
❍ NO
Have all cabinet openings and wiring been sealed
with caulking?
Is the filter clean, in place and of adequate size?
Is the wiring tight, correct and to the wiring diagram?
Is the unit properly grounded and protected (fused)?
Is the thermostat heat anticipator been set properly?
Is the unit circuit breaker(s) rotated properly “on” up
- “off” down?
Are the unit circuit breaker(s) line lug cover(s) in
place?
Are all access panels in place and secure?
Refer to outdoor unit installation instructions for system
start-up instructions and refrigerant charging instructions.
13.0 MAINTENANCE
For continuing high performance, and to minimize possible equipment failure, it is
essential that periodic maintenance be performed on this equipment. Consult your local
dealer as to the proper frequency of maintenance and the availability of a maintenance
contract.
IMPORTANT: Before performing any service or maintenance procedures, read all
“WARNINGS” listed in these installation instructions.
46
Page 47
!
WARNING
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) deenergized. Contact with the line side can cause electrical shock resulting in
personal injury or death.
13.1 AIR FILTER (Not Factory Installed)
Check the system filter every ninety days or as often as found to be necessary and if
obstructed, clean or replace at once.
IMPORTANT: Do not operate the system without a filter in place.
13.2 INDOOR COIL - DRAIN PAN - DRAIN LINE
Inspect the indoor coil once each year for cleanliness and clean as necessary. It is necessary to remove the filter and check the return air side of the coil for debris.
IMPORTANT: Do not use caustic household drain cleaners, such as bleach, in the condensate pan or near the indoor coil. Drain cleaners will quickly damage the indoor coil.
CAUTION
In 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-ABXX.
13.3 THE COMFORT CONTROL2SYSTEM™ CONTROL BOARD
REPLACEMENT
Verification of the Comfort Control2System™ control board failure is required before
replacement. Access the diagnostic codes using a service tool or access the installer
menus using the thermostat (the system must be wired as a serial communicating system to access the installer menus using the thermostat). Reference the Air Handler
Diagnostic Code Table in Section 5.20.
NOTE: The memory card is attached to the control box with a tether. The tether has an
identification label that can be used to identify the memory card if replacement is needed.
IMPORTANT: Do not cut the tether attached to the memory card when replacing the
Comfort Control
2
. Reinsert the memory card into the replacement Comfort Control2.
FIGURE 38
COMFORT CONTROL2BOARD REPLACEMENT
MEMORY CARD
TETHER
47
Page 48
13.4 BLOWER MOTOR AND WHEEL
Inspect the blower motor and wheel for cleanliness. With the system air filter in place, it
should be several years before it would become necessary to clean the blower motor
and wheel.
• If it becomes necessary to remove the blower assembly from the unit, see instructions on removal and disassembly of motor, blower and heater parts.
• The blower motor and wheel may be cleaned by using a vacuum with a soft brush
attachment. Remove grease with a mild solvent such as hot water and detergent. Be
careful not to disturb the balance weights (clips) on the blower wheel blades. Do not
drop or bend wheel as balance will be affected.
13.5 LUBRICATION
The blower motor sleeve bearings are pre-lubricated by the motor manufacturer and do
not have oiling ports. Motor should be run for an indefinite period of time without additional lubrication.
13.6 BLOWER ASSEMBLY REMOVAL AND REPLACEMENT
Removing the blower assembly is not required for normal service and maintenance.
Removal is necessary for replacement of components such as motor, blower wheel.
After extended use, removal of the blower assembly may become necessary for a thorough cleaning of the blower motor and wheel.
!
WARNING
If 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.
• Mark field power supply wiring (for replacement) attached to terminal block or circuit
breaker(s) on blower assembly. Remove wiring from terminal block or circuit breaker(s).
• Mark low voltage control wiring (for replacement) where attached to unit control terminals on left side of blower housing.
• Remove a screw holding blower assembly to front channel of cabinet and pull blower
assembly from cabinet.
• To replace blower assembly, slide blower assembly into blower deck. Make sure
blower assembly engages lances in deck properly. If assembly hangs up, check to
make sure top and bottom are lined up in proper locations.
• Slide blower assembly to back of cabinet and make sure it is completely engaged.
• Replace two screws holding blower assembly to front channel of cabinet. Take care
not to strip screws, just snug into place.
• Replace low voltage control wiring with wire nuts and make sure wiring is to wiring
diagram and a good connection has been made.
• Replace field power wiring to terminal block or circuit breaker(s) on control area of
blower assembly. Make sure wires are replaced as they were, check wiring diagram if
necessary. Tighten supply power wiring securely to terminals lugs.
• Make sure wiring is within cabinet and will not interfere with access door. Make sure
proper separation between low voltage control wiring and field power wiring has been
maintained.
• Replace blower assembly control access panel before energizing equipment.
13.7 MOTOR REPLACEMENT
With the blower assembly removed, the indoor blower motor can be removed and
replaced using the following procedure:
• Remove motor leads from the motor high and low voltage plugs. Note the lead locations for ease of re-assembly.
• Loosen the set screw holding the blower wheel onto the motor shaft. The shaft
extends through the blower hub so that a wrench can be used on the extended shaft
to break the shaft loose if necessary. Be careful not to damage the shaft. Use a
wheel puller on the groove in the hub if necessary.
48
Page 49
FIGURE 39
INTERNAL MOTOR PLUG AND SOCKET
• Loosen the bolt holding the wire motor band around the motor shell and pull the
motor from the motor mount. Note the motor position in the mount for re-assembly.
• To re-assemble, insert the motor shaft through the hub in the blower wheel and orient
the motor to original position.
• For proper motor cooling, it is important that the motor be mounted the same as the
original, as far into the blower as practical.
• The dimension from the face of the motor end plate (shaft end) to the first wire on the
motor mount band around the shell should be:
DIMENSIONTONNAGECABINET SIZE
3
1
/32"1
1
1
/2"2
1
2
/2"3, 31/2 & 421
7
2
/8"524
1
/2 & 217
1
/2 & 317
• With motor held to above position and motor lead plugs oriented to the original position (the wire connectors on the motor must point straight to the supply air end of the
unit and away from the return air [filter] end of the unit). Securely tighten the bolt on
the mount band to the motor shell.
• Turn the motor shaft so that the flat on the shaft is located under blower wheel
setscrew, and the blower wheel is centered in the blower housing with the same distance on each side between the inlet venturi and the outside of the blower wheel.
• Re-assemble the motor wiring (high and low voltage plugs) into the motor.
IMPORTANT: DO NOT FORCE POWER PLUG INTO THE MOTOR CONNECTOR
BACKWARDS. The A.C. power plug to the motor has locking tabs. It has been
proven that by applying excessive force to the A.C. cable half of the connector it is
possible to force the connector in backwards. It will not seat and “click” properly but
will make connection. If A.C. power is applied with the connector reversed the motor
will be immediately destroyed.
13.8 ECM CONTROL MODULE REPLACEMENT
Always take the following steps before replacing the control module on the end of the
ECM indoor blower motor.
1. HAVE THE CORRECT REPLACEMENT MODULE. These controls are factory pro-
grammed for specific operating modes. Even though they look alike, different modules may have different CFM characteristics.
IMPORTANT: Using the wrong control module voids all product warranties and may produce unexpected results.
2. Turn off power to the equipment. Wait at least 5 minutes after disconnecting AC
power before opening the motor.
49
Page 50
!
WARNING
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 serious equipment damage, personal injury or death.
3. While not necessary, it may prove easier to remove the complete blower assembly
from the furnace. Unplug the two cable connectors to the motor. There are latches
on each connector. DO NOT PULL ON THE WIRES. TO REMOVE THE PLUG,
SQUEEZE THE PIN LATCH. The plugs remove easily when properly released.
FIGURE 40
ECM MOTOR COMPONENTS
FIGURE 41
MOTOR ALIGNMENT PIN
4. Locate the two standard 1/4" hex head bolts on the flat end of the motor control
module casting. Remove these bolts from the motor while holding the control module. DO NOT REMOVE TWO SCREWS WITH TORX HEADS.
5. The control module is still connected to the motor by a plug and cable. Carefully
rotate the control so as to gain access to the plug on the cable end. Squeeze the
release latch and gently pull the plug out of the control module. DO NOT PULL ON
THE WIRES. GRIP THE PLUG ONLY.
6. The control module is now completely detached from the motor. Use an ohmmeter
to measure the resistance from each motor lead (in the motor plug just removed) to
the motor shell. This resistance must be greater than 100K ohms. Always measure
to the unpainted motor end plate. If any motor lead fails this test DO NOT INSTALL
THE NEW CONTROL MODULE.
7. Verify that the replacement control module is correct. Place the new module next to
the motor and carefully insert the plug that was removed in step 5. BE SURE THE
PLUG LATCHES. IT SHOULD CLICK INTO PLACE.
8. Install the new control module back on the motor. Carefully engage the alignment
pin into the appropriate mating motor hole.
9. Replace the two 1/4" hex head bolts. Tighten the bolts snugly. DO NOT OVER
TIGHTEN.
IMPORTANT: Before replacing the blower motor assembly, check the installation for any
application fault that might have caused the motor or control module to fail. Water damage could show as corrosion on the inside or outside of the casting. If so, run a Moisture
Check.
10. Install the blower motor assembly back into the furnace. Follow the manufacturer’s
suggested procedures.
11. Plug the control connector into the motor. The connector is keyed. Be sure the
connector is properly seated and latched.
12. Plug the control connector into the motor. The connector is keyed. Be sure the
connector is properly seated and latched. OBSERVE THE PROPER ORIENTATION. DO NOT FORCE THE CONNECTOR. It plugs in very easily when properly
oriented.
50
!
CAUTION
Reversing the 5-pin connector on the ECM motor causes immediate failure of
the control module.
Page 51
13. Final installation check. Be sure the motor is installed as follows.
a. Set the motor into the blower housing as originally provided from the manufactur-
er.
b. Do not allow the motor mount to cover the motor vent openings.
c. Do not attach the motor mount to the motor electronics compartment.
d. The motor connectors should be straight down.
e. Have appropriate drip loops formed in the harnesses.
14. Restore 230 volt power to the system. Verify that the new motor control module
works properly.
13.9 BLOWER WHEEL REPLACEMENT
With the blower assembly removed and the motor assembly removed (see above
instructions), remove the two screws holding the blower wrap (cutoff) to the blower
sides.
IMPORTANT: It is not necessary to remove heating ele ment(s), if provided, to remove
the blower wheel.
• With wrap (cutoff) screws removed, cut off end of blower wrap will spring up. Lifting
wrap blower wheel is removed through the discharge opening in the blower housing.
• To replace, make sure wheel is oriented properly with hub to the opposite side from
the motor. Lift blower wrap and insert blower wheel through discharge opening in the
blower housing.
• Hold blower wrap down into position and replace two screws holding blower wrap to
blower sides.
• See motor replacement and blower assembly instructions for remaining assembly
procedure.
14.0 REPLACEMENT PARTS
Any replacement part used to replace parts originally supplied on equipment must be
the same as or an approved alternate to the original part supplied. The manufacturer will
not be responsible for replacement parts not designed to physically fit or operate within
the design parameters the original parts were selected for.
These parts include but are not limited to: Circuit breakers, heater controls, heater limit
controls, heater elements, motor, motor capacitor, blower relay, control transformer,
blower wheel, filter, indoor coil and sheet metal parts.
When ordering replacement parts, it is necessary to order by part number and include
with the order the complete model number and serial number from the unit data plate.
(See parts list for unit component part numbers).
15.0 ACCESSORIES - KITS - PARTS
• Combustible Floor Base RXHB-17, RXHB-21, RXHB-24 (for standard units) for
downflow applications, see section of this manual covering combustible floor base.
Model Cabinet SizeBase Model Number
17RXHB-17
21RXHB-21
24RXHB-24
Combustible Floor
51
Page 52
• External Filter Base RXHF- (See Figure 42)
Model Cabinet SizeFilter SizePart NumberAB
1716 x 20 [406 x 508] RXHF-1715.7017.50
2120 x 20 [508 x 508] RXHF-2119.2021.00
2425 x 20 [635 x 508] RXHF-2422.7025.50
Accommodate
1” or 2”
filter
FIGURE 42
EXTERNAL FILTER BASE: RXHF-
52
Page 53
• External Filter Rack: RXHF-B (See Figure 43)
Model Cabinet SizeFilter SizePart NumberAB
1716 x 20 RXHF-B1716.9020.77
2120 x 20RXHF-B2120.4020.77
2425 x 20 RXHF-B2425.0021.04
Accommodate
1” filter
FIGURE 43
EXTERNAL FILTER RACK: RXHF- B17, B21, B24
➦
1.50
➦
B
A
• Horizontal Adapter Kit RXHH-
This horizontal adapter kit is used to convert Upflow/Downflow only models to horizontal flow. See the following table to order proper horizontal adapter kit.
Coil Model
Horizontal Adapter KitHorizontal Adapter Kit
Model Number (Single Qty.)Model Number (10-pak Qty.)
2414RXHH-A01RXHH-A01x10
2417RXHH-A02RXHH-A02x10
3617/3621RXHH-A03RXHH-A03x10
3821/4821/4824RXHH-A04RXHH-A04x10
6024RXHH-A05RXHH-A05x10
• Auxiliary Horizontal Unit Overflow Pan Accessory RXBM-
NominalAuxiliary Horizontal Overflow
CoolingPan Accessory
Capacity TonModel Number
1
/2 - 3RXBM-AC48
1
1
3
/2 - 5RXBM-AC61
53
Page 54
FIGURE 44
COMFORT CONTROL2SYSTEM™ AIR HANDLER WIRING DIAGRAM (-)H2V
54
Page 55
55
Page 56
56CM 0214
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