Air Handlers R-410A User Manual

92-20521-105-00

sWARNING

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.

AIR HANDLERS

FEATURING INDUSTRY STANDARD R-410A REFRIGERANT:

FHTS Standard Efficiency with Aluminum Coil

INSTALLATION INSTRUCTIONS

TABLE OF CONTENTS

1.0 SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2.0 GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1 Important Information About Efficiency and Indoor Air Quality. . . . . . . . . . . . 5

2.2 Receiving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.3 Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.4 Model Number Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.4A Available Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2.5 Dimensions and Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.0 APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.1 Vertical Upflow and Horizontal Left . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.2 Vertical Downflow and Horizontal Right. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.3 Installation in an Unconditioned Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3.4 Installation in Mobile/Manufactured Homes. . . . . . . . . . . . . . . . . . . . . . . . . 13

4.0 ELECTRICAL WIRING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.1 Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.2 Control Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.2B Thermostat Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.3 Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.4 Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.5 Blower Motor Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.5 Blower Motor Electrical Data: (-)H1P. . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.6 Copper Wire Size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.7 Electric Heat Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.7A Electric Heat Electrical Data: (-)H1P . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.7B Heater Kit Supplemental Information . . . . . . . . . . . . . . . . . . . . . . . . . 20

5.0 AIRFLOW PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.1 Airflow Operating Limits (-)H1P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5.2 240V Airflow Performance Data (-)H1P. . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6.0 DUCTWORK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.0 REFRIGERANT CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.1 TEV Sensing Bulb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

7.2 Orifice Size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.3 Condensate Drain Tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

7.4 Duct Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

8.0 AIR FILTER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

9.0 SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

9.1 Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

9.2 Heating (electric heat only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

9.3 Heating (heat pump) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

9.4 Blower Time Delay (heating or cooling). . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

9.5 Defrost (defrost heat control) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

9.6 Emergency Heat (heating heat pump). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

9.7 Room Thermostat (anticipator setting). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

10.0 CALCULATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

10.1 Calculating Temperature Rise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

10.2 Calculating BTUH Heating Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

10.3 Calculating Airflow CFM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

10.4 Calculating Correction Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

11.0 PRE-START CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

12.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

12.1 Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

12.2 Indoor Coil/Drain Pan/Drain Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

12.3 Blower Motor & Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

12.4 Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

12.5 Blower Assembly Removal and Replacement. . . . . . . . . . . . . . . . . . . . . . . 32

12.6 Motor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

12.7 Blower Wheel Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

13.0 REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

14.0 ACCESSORIES - KITS - PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Continued on next page ›

1.0 SAFETY INFORMATION

WARNING

Because of possible damage to equipment or personal injury, installation, service, and maintenance should be performed by a 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 3.2: VERTICAL DOWNFLOW)

for units requiring a combustible floor base.

See the accessory section in this manual for combustible floor base RXHB.

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.

WARNING

If removal of the blower assembly is required, all disconnect switches supplying power to the equipment 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.

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.

(SEE SECTION 4.0: ELECTRICAL WIRING)

(SEE SECTION 12.5: BLOWER ASSEMBLY REMOVAL & REPLACEMENT)

WARNING

Duct leaks can create an unbalanced system and draw pollutants such as dirt, dust, fumes and odors into the home causing property damage. Fumes and odors from toxic, volatile or flammable chemicals, as well as automobile exhaust and carbon monoxide (CO), can be drawn into the living space through leaking ducts and unbalanced duct systems causing personal injury or death (see Figure 1).

• 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 5.0: 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 (SEE SECTION 12.0: 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) deenergized. Contact with the line side can cause electrical shock resulting in 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.

CAUTION (SEE SECTION 3.3: HORIZONTAL)

Horizontal units must be configured for right hand air supply or left hand air supply. Horizontal drain pan must be located under indoor coil. Failure to use the drain pan can result in property damage.

WARNING (SEE SECTION 12.6: MOTOR REPLACEMENT)

To avoid electrical shock which can result in personal injury or death, use only the screws furnished in the motor shell mounting holds. Screws are #8-18 x .25 in. long blunt nose thread forming. Screws longer than 1/4 in. may contact the motor winding.

WARNING

PROPOSITION 65: This appliance con-

tains 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

and the State of California’s OEHHA (Office of Environmental Health Hazard Assessment), at www.oehha.org

. Consumer education is important since the chemicals and substances on the list are found in our daily lives. Most consumers are aware that products present safety and health risks, when improperly used, handled and maintained.

CAUTION (SEE SECTION 2.1: RECEIVING)

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 for auxiliary horizontal overflow pan RXBM.

NOTICE

When used in cooling applications, excessive sweating may occur when unit is installed in an unconditioned space. This can result in property damage.

WARNING (SEE SECTION 7.0: AIR FILTER)

Do not operate the system without filters. A portion of the dust entrained in the air may temporarily lodge in the duct runs and at the supply registers. Any circulated dust particles could be heated and charred by contact with the air handler elements. This residue could soil ceilings, walls, drapes, carpets and other articles in the house.

Soot damage may occur with filters in place, when certain types of candles, oil lamps or standing pilots are burned.

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 opening of a downflow unit can cause a fire resulting in property damage, personal injury or death.

Exceptions to downflow warnings:

• Installations on concrete floor slab with supply air plenum and ductwork completely encased in not less than 2 inches of concrete (See NFPA 90B).

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

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 carries the cooled or heated air. To maintain efficiency, comfort and good indoor air quality,

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.

FIGURE 1

MIGRATION OF DANGEROUS SUBSTANCES, FUMES, AND ODORS INTO LIVING SPACES

WARNING

NOTICE

sWARNING

Carbon Monoxide (CO) Poisoning

Can Cause Severe Injury or Death.

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 exit 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.

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.

2.2 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.

2.3 CLEARANCES

• All units are designed for “0” inches clearance to combustible material on all cabinet

surfaces.

• Units with electric heat require a one inch clearance to combustible material for the

first three feet of supply plenum and ductwork.

• Some units require a combustible floor base depending on the heating kW. The fol-

lowing table should be used to determine these requirements.

Additionally, if these units are installed down-flow, a combustible floor base is required. See Accessories for Combustible Floor Base RXHB-XX.

Units with electric heating kW equal to

or less than the values listed in the table do

not require a combustible floor base.

• Vertical units require clearance on at least one side of the unit for electrical connec-

tions. Horizontal units require clearance on either top or bottom for electrical connections. Refrigerant and condensate drain connections are made on the front of the unit.

• All units require 24 inches minimum access to the front of the unit for service.

• These units may be installed in either ventilated or nonventilated spaces.

Model Cabinet Size 17 21 24

Maximum Model Designation kW 15 18 20

NOTICE

FIGURE 2

MODEL NUMBER EXPLANATION

F H 18 17 T T S A S N

NOMINAL CAPACITY

18 = 18,000 BTU/H 42 = 42,000 BTU/H 24 = 24,000 BTU/H 48 = 48,000 BTU/H 30 = 30,000 BTU/H 60 = 60,000 BTU/H 36 = 36,000 BTU/H

MOTOR TYPE

T = CONSTANT TORQUE P = PSC

METERING DEVICE

T = TEV

PRODUCT CATEGORY

H = AIR HANDLER

COMMUNICATION

N = NON-COMMUNICATING C = COMMUNICATING

EFFICIENCY

S = STANDARD M = MEDIUM H = HIGH

VOLTAGE

A = 115/1/60 D = 480/3/60 J = 208/240/1/60

SPEED

S = STANDARD T = TWO STAGE

WIDTH

17 = 17.5” (600-1200 CFM) 21 = 21” (800-1600 CFM) 24 = 24.5” (1400-1800 CFM)

TRADE BRAND

F = FUJITSU

2.4 MODEL NUMBER EXPLANATION

FH3617TPSDSN FH3621TPSDSN FH4221TPSDSN FH4821TPSDSN FH4824TPSDSN FH6024TPSDSN

AVAILABLE MODELS AT “A” VOLTAGE

AVAILABLE MODELS AT “J” VOLTAGE

AVAILABLE MODELS AT “D” VOLTAGE

Notes:

• 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 (208/240V) single phase air handler is designed to be used with single or

three phase 208/240V 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.

• The air handlers are shipped from the factory with the proper indoor coil installed, and

cannot be ordered without a coil.

• The air handlers do not have an internal filter rack. An external filter rack or other

means of filtration is required.

2.4A AVAILABLE MODELS

FH1817TPSASN FH2417TPSASN FH3017TPSASN FH3617TPSASN FH4221TPSASN FH4821TPSASN

FH1817TPSJSN FH2417TPSJSN FH3017TPSJSN FH3617TPSJSN FH3621TPSJSN FH4221TPSJSN FH4821TPSJSN FH4824TPSJSN FH6024TPSJSN

FIGURE 3

DIMENSIONS AND WEIGHTS

2.5 DIMENSIONS & WEIGHTS

A-1038-01

NOTE: 24" CLEARANCE REQUIRED IN FRONT OF UNIT FOR FILTER AND COIL MAINTENANCE.

ELECTRICAL CONNECTIONS MAY EXIT TOP OR EITHER SIDE

HIGH VOLTAGE CONNECTION 7/8", 1 3/32", 1 31/32" DIA. KNOCK OUTS.

LOW VOLTAGE CONNECTION 5/8" AND 7/8" KNOCK OUT (OUTSIDE OF CABINET)

FLANGES ARE PROVIDED FOR FIELD INSTALLATION

AUXILIARY DRAIN CONNECTION 3/4" FEMALE PIPE THREAD (NPT) HORIZONTAL APPLICATION ONLY

PRIMARY DRAIN CONNECTION 3/4" FEMALE PIPE THREAD (NPT)

AUXILIARY DRAIN CONNECTION 3/4" FEMALE PIPE THREAD (NPT) UPFLOW/DOWNFLOW APPLICATION ONLY

LIQUID LINE CONNECTION COPPER (SWEAT)

VAPOR LINE CONNECTION COPPER (SWEAT)

2111/16

105/16

SUPPLY AIR

191/2

RETURN AIR OPENING

UPFLOW UNIT SHOWN; UNIT MAY BE INSTALLED UPFLOW, DOWNFLOW. HORIZONTAL RIGHT, OR LEFT AIR SUPPLY.

DIMENSIONAL DATA

MODEL

Motor

Type

Width Model # Capacity

Meter

EXV/TXV/

Piston

UNIT

WIDTH

“W” IN.

[mm]

SUPPLY

DUCT

“A” IN.

[mm]

AIRFLOW COIL

(NOM.) [L/s]

LO HI

UNIT WEIGHT / SHIPPING

WEIGHT (LBS.) [kg]

UNIT

HEIGHT

IN. [mm]

17 18 S T

/8" [9.53] 3/4" [19.05] 421/2" [1080] 171/2" [444.5] 16" [406.4] 600 [283] 800 [378] 81/95 [37/43]

17 18 S T

17 30 S T

/8" [9.53] 3/4" [19.05] 421/2" [1080] 171/2" [444.5] 16" [406.4] 1000 [472] 1200 [566] 90/104 [41/47]

17 36 S T

21 36 S T

/8" [9.53] 7/8" [22.23] 421/2" [1080] 21" [533.4] 191/2" [495.3] 1200 [566] — 109/124 [49/56]

21 42 S T

/8" [9.53] 7/8" [22.23] 501/2" [1283] 21" [533.4] 191/2" [495.3] 1400 [661] 1600 [755] 130/146 [59/66]

21 48 S T

24 48 S T

/8" [9.53] 7/8" [22.23] 501/2" [1283] 241/2" [622.3] 23" [584.2] 1600 [755] — 143/161 [65/73]

24 60 S T

/8" [9.53] 7/8" [22.23] 551/2" [1410] 241/2" [622.3] 23" [584.2] — 1800 [850] 164/181 [75/82]

UNIT WITH

COIL (MAX. kW.)

REFRIGERANT

CONNECTIONS

Single Speed Air Handler with PSC motor

SWEAT (IN.) [MM] ID

LIQUID VAPOR

Return Air Return Air Opening

Model

Opening Width Depth/Length

Cabinet Size

(Inches) (Inches)

17 157⁄8 193⁄4

21 193⁄8 193⁄4

24 227⁄8 193⁄4

Return Air Opening Dimensions

3.0 APPLICATIONS

3.1 VERTICAL UPFLOW AND HORIZONTAL LEFT

• Vertical Upflow and Horizontal Left is the factory configuration for all models (see

Figure 3).

• If a side return air opening is required, field fabricate a return air plenum with an open-

ing large enough to supply unit and strong enough to support unit weight.

• 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.

3.2 VERTICAL DOWNFLOW AND HORIZONTAL RIGHT

Conversion to Vertical Downflow and Horizontal Right: A vertical upflow unit may be converted to vertical downflow. Remove the door and indoor coil and reinstall 180° from original position (see Figure 6). (See kit model number on page 35).

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 5).

- 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.

- 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.

FIGURE 4

DIMENSIONS FOR FRONT CONNECT COIL

515/16

41/8

31/16

13/16

11/8

11/16

13/8

213/16

51/4

53/8

- 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.

• RXHB combustible floor base is used for all unit sizes. Unit must be centered on combustible base in the width dimension (143/8”). (See Section 14.0 for more information on the combustible floor base.)

DRIP LOOP: When installing the unit in down-flow or horizontal-right positions, make sure that the wires coming from the motor form a proper drip loop. This allows water to cascade off the lowest point of the wiring before it enters the motor head. This may require cutting the wire tie and installing a new wire tie to form this loop.

• Rotate unit into the downflow position, with the coil compartment on top and the blower compartment on bottom.

• The set of coil rails must be moved for vertical down-flow and horizontal right application. Remove the coil rail form 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 6, 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 14.0: Accessories - Kits - Parts.)

IMPORTANT: Units cannot be installed horizontally laying on or suspended from the back of the unit.

WARNING

The RXHB-17, RXHB-21 or RXHB-24 combustible floor base is required when some units with electric heat 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.

FIGURE 5

ROTATING CIRCUIT BREAKER

+ 25 hidden pages

Air Handlers R-410A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual