Suntherm SEHX Manuale utente

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INSTALLATION MANUAL

Horizontal Air Handler Models:

SEHX - DX Cooling w/ Electric Heat, Uncased SDXW - DX Cooling w/ Hot Water Heat, Uncased

CEHX – DX Cooling w/ Electric Heat, Cased CDXW – DX Cooling w/ Hot Water Heat, Cased

SCWE – Chilled Water Cooling w/Electric Heat, Uncased-2P SCWW – Chilled Water Cooling w/Hot Water Heat, Uncased-4P

CCWE – Chilled Water Cooling w/Electric Heat, Cased-2P CCWW – Chilled Water Cooling w/Hot Water Heat, Cased-4P

LIST OF SECTIONS

1 – General 1 7 – Hot Water and Chilled Water Tables 15

2 – Safety, Mounting, General, Dimensional & Nomenclature Info 2 8 – Line Voltage Wiring 24

3 – Clearance and Return Air Requirements 7 9 – Thermostat Wiring and Connections 27

4 – Air Handler and Supply Air Duct Installation 9 10 – Motor, Blower and Furnace Startup 32

5 – Air Handler Installation 10 11 – Final System Checkout 34

6 – Refrigerant Piping, TXV, Flowrator & Condensate Drain Info 10 12 – Wiring Diagrams 35

LIST OF FIGURES

1 – Cased Enclosure Mounting 3 21 – Separate TStat, Separate Air Handler and Cooling Units 28

2 – CEHX/CCWE Dimension Data DX Cool w/ or w/o Elect Heat 5 22 – Separate TStat & Trans.; Separate Air Handler and Cooling 28

3 – SEHX/SCWE Dimension Data Chill Water w/ or w/o Elect Heat 6 23 – Same TStat, Separate Trans, Separate Air Handler & Cool Units 28

4 – Clearance – Access for Service 8 24 – Same TStat, Same Trans, Separate Air Handler & Cooling Units 29

5 – Ceiling Access Panel 9 25 – Honeywell T9611Heat Pump Thermostat Connections 29

6 – Evaporator Below Condenser Piping 10 26 – White Rodgers Multistage Heat / Cool T’stat Connections 30

7 – The TXV Bulb Best Placement 11 27 – White Rodgers Multistage Heat / Cool / HP T’stat Connections 30

8 – TXV Sensing Bulb Location 12 28 – White Rodgers Heat / Cool Two Trans T’stat Connections 30

9 – Typical TXV Connections 13 29 – Blower Assembly 32

10 – Flowrator Distributor Assembly 13 30 – Blower Motor Retainer Clips 32

11 – Proper Mounting of the SHL Temperature Switch 14 31 – PSC Blower Assembly 32

12 – Proper Wiring of the SHL Temperature Switch 14 32 – Constant Torque Blower Assembly 33

13 – Diagram of the Heating Cycle of a Heat Pump SHL Switch Loc 14 33 – Constant Torque Motor Terminals 34

14 – Diagram of the Cooling Cycle of a Heat Pump SHL Switch Loc 14 34 – Wire Diagram 3kW-10kW Electric HT- PSC Motor 35

15 – Condensate Drain Pan 15 35 – Wire Diagram 3kW-10kW Electric HT- PSC Motor w/ Lockout 35

16 – Typical Condensate Trap 15 36 – Wire Diagram Hydronic Heat – PSC Motor – w/FS - No Pump 36

17 – Components and Water Connections 16 37 – Wire Diagram Hydronic Heat – PSC Motor – w/FS and Pump 36

18 – Component Locations – Electric Heat Control Box 26 38 – Wire Diagram 3kW-10kW Electric HT- C.T. Motor w/ Lockout 37

19 – Component Locations – No Heat Control Box 27 39 – Wire Diagram Electric Heat – C.T. Motor w/ FS – No Pump 37

20 – Component Locations – Hydronic Heat Control Box 27 40 – Wire Diagram Electric Heat – C.T. Motor w/ FS and Pump 38

LIST OF TABLES

1 – SEHX General Specifications 4 19 – SCWW/CCWW Chilled Water Capacity 4&5 Row Coil – C.T. 21

2 – CEHX General Specifications 4 20– SCWW/CCWW Hot Water Capacity 4&5 Row Coil PSC 22

3 – SCWE General Specifications 4 21 – SCWW/CCWW Hot Water Capacity 4&5 Row Coil – C.T. 23

4 – CCWE General Specifications 4 22 – SCWW/CCWW Hot Water Capacity 2 Row HW Coil - PSC 23

5 – SDXW General Specifications 4 23 – SCWW/CCWW Hot Water Capacity 2 Row HW Coil – C.T. 23

6 – CDXW General Specifications 4 22 – SDXW/CDXW Hot Water Capacity 2 Row HW Coil - PSC 24

7 – SCWW General Specifications 5 23 – SDXW/CDXW Hot Water Capacity 2 Row HW Coil – C.T. 24

8 – CCWW General Specifications 5 24 – Wiring Requirements 208/240 VAC Electric Heat 18-37 Models25

9 – CEHX/CCWE/CDXW/CCWW Dimensional Data 5 25 – Wiring Requirements 120 VAC Hydronic Heat 18-37 Models 25

10 – SEHX/SCWE/SDXW/SCWW Dimensional Data 6 26 – Electric Heater Electrical Data 25

11 – SEHX/CEHX/SCWE/CCWE Model Nomenclature 7 27 – Electrical Data 26

12 – Clearance to Combustibles 8 28 – Low Voltage Wire Gauge and Maximum Lengths 27

13 – Optional Ceiling Access Panels 9 29 – White Rodgers Thermostat Terminal Designations 29

14 – SCWE/CCWE/ Chilled Water Capacity 4&5 Row Coil – PSC 16 30 – Typical Air Handler Unit TStat Pigtail Wire Colors & Connect 31

15 – SCWW/CCWW Chilled Water Capacity 4&5 Row Coil – C.T. 17 31 – Typical Cooling Unit Thermostat Wire Colors & Connections 31

16 – SCWE/CCWE Hot Water Capacity 4&5 Row Coil – PSC 18 32 – Typical Heat Pump Thermostat Wire Colors & Connections 31

17 – SCWE/CCWE Hot Water Capacity 4&5 Row Coil – C.T. 19 33 – Constant Torque Motor Terminals 33

18 – SCWW/CCWW Chilled Water Capacity 4&5 Row Coil - PSC 20

SECTION I: GENERAL

The following list includes important facts and information

regarding the electric furnace and its inclusions.

1. Horizontal Air Handler Unit is rated at either 120 volts AC

or 240 volts AC at 60 Hertz - 1 Phase

2. Horizontal Air Handler Unit is not designed to operate

with a 50 HZ voltage supply.

3. Horizontal Air Handler Unit size varies by model

4. Four-wire thermostat operation for heating and cooling

5. Seven wire thermostat for heat pump operation.

6. Horizontal Air Handler Unit is equipped with blower for

A/C or Heat Pump operation for horizontal applications

only.

7. This air handler must not be operated without the door

installed

NOTE: This Horizontal Air Handler Unit and its components listed on

the A/C and Heat Pump equipment sticker were listed in combination

as a system by ETL for the United States and Canada.

SAVE THIS MANUAL FOR FUTURE REFERENCE

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SECTION II: SAFETY

This is a safety alert symbol. When you see this symbol on

labels or in manuals; be alert to the potential for personal injury.

Understand and pay particular attention to the signal words

DANGER, WARNING, or CAUTION.

DANGER: indicates an imminently hazardous situation, which if

not avoided, will result in death or serious injury.

WARNING: indicates a potentially hazardous situation, which if

not avoided, could result in death or serious injury.

CAUTION: indicated a potentially hazardous situation, which if

not avoided, may result in minor or moderate injury. It is also

used to alert against unsafe practices and hazards involving

property damage.

IMPORTANT

Safety Requirements

This appliance should be installed in accordance with all

national and local building/safety codes and requirements, local

plumbing or waste water codes, and other applicable codes. In

the absence of local codes, install in accordance with the

following codes.

Standard for the Installation of Air Conditioning and

Ventilating Systems (NFPA 90A)

Standard for the Installation of Warm Air heating and

Air Conditioning Systems (NFPA 90B)

National Electrical Code (NFPA 70)

Canadian Electrical Code, Part I (CSA C22.2) or

ANSI/NFPA No. 70

All local codes (State, City, and Township)

NOTE: All applicable codes take precedence over any

recommendation made in these instructions.

SunTherm assumes no responsibility for units installed in

violation of any code or regulation.

1. Refer to the unit rating plate for the air horizontal Air

Handler unit model number, and then see the dimensions

page of this instruction for return air plenum dimensions in

Figure 2 and Table 9 also Figure 3 and Table 10. The

plenum must be installed according to the above listed

codes or the instructions in this manual.

2. Refer to the dimensions page of this instruction to

determine the proper location to install the horizontal Air

Handler unit for horizontal applications.

3. These models ARE NOT ETL listed or approved for

installation into a Manufactured (Mobile) Home.

4. Provide clearances from combustible materials as listed

under Clearances to Combustibles.

5. Provide clearances for servicing ensuring service access is

allowed for the control box, electric elements, hot water

coil and the blower.

6. Check the rating plate and the power supply to be sure the

electrical characteristics match.

7. Failure to carefully read and follow all instructions in this

manual can result in malfunction of the horizontal Air

Handler unit, death, personal injury, and/or property

damage.

8. Electric horizontal Air Handler unit shall be installed so the

electrical components are protected from water.

9. Installing and servicing heating/cooling equipment can be

hazardous due to electrical components.

10. Only trained and qualified personnel should install repair or

service heating/cooling equipment. Untrained service

personnel can perform basic maintenance functions such as

cleaning of exterior surfaces and replacing the air filters.

Observe all precautions in the manuals and on the attached

labels when working on this appliance.

11. These instructions cover minimum requirements and

conform to existing national standards and safety codes. In

Improper installation may create a condition where the

operation of the product could cause personal injury or

property damage.

Improper installation, adjustment, alteration, service or

maintenance can cause injury or property damage. Refer to

this manual for assistance; or for additional information

consult a qualified contractor, installer, or service agency.

FIRE OR ELECTRICAL HAZARD

Failure to follow the safety warnings exactly could result in

serious injury, death, or property damage.

A fire or electrical hazard may result causing property

damage, personal injury or loss of life.

The Clean Air Act of 1990 bans the intentional venting of

refrigerant (CFC's and HFC's) as of July 1, 1992. Approved

methods of reclaiming must be followed. Fines and/or

incarceration may be levied for non-compliance

This product must be installed in strict compliance with the

installation instructions and any applicable local, state, and

national codes including, but not limited to; building,

electrical, and mechanical codes.

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some instances these instructions exceed certain local codes

and ordinances, especially those who have not kept up with

changing home construction practices. These instructions

are to be followed and are the minimum requirement for a

safe installation.

12. The size of the unit should be based on an acceptable heat

loss calculation for the structure. ACCA, Manual J or other

approved methods may be used.

13. The 115 VAC models use nominal 115 VAC, 1 Phase, 60-

Hertz power supply. DO NOT CONNECT THIS

APPLIANCE TO A 50 HZ POWER SUPPLY OR A

VOLTAGE ABOVE 132 VOLTS OR BELOW 98 VOLTS.

14. The 208/230 VAC models use nominal 208 or 230 VAC, 1

Phase, 60-Hertz power supply. DO NOT CONNECT THIS

APPLIANCE TO A 50 HZ POWER SUPPLY OR A

VOLTAGE ABOVE 253 VOLTS OR BELOW 187

VOLTS.

15. Ground connections MUST BE securely fastened to the

control box and ground wires MUST BE secured to the

ground lugs in the control box.

16. Duct work must be installed in accordance with the

standards of the National Fire Protection Association

(NFPA) for the installation of Air Conditioning, Warm Air

Heating and Ventilation Systems (NFPA 90A and 90B).

The air distribution duct should be sized for 0.2 inches of

static pressure. See National Environmental Systems

Contractors Association Manual K for duct sizing.

17. The safety testing label appearing on this unit covers the

unit and the factory installed coil (if provided) only. It does

not cover any other equipment.

18. Exterior surface of the cabinet may sweat when installed in

a non-conditioned space such as an attic or garage. Installer

must provide a protection such as a full size auxiliary drain

pan under all units installed in the non-conditioned space.

The drain pan is needed to prevent damage from

condensation runoff on the unit casing.

19. Cabinet insulation is rated for R-2.1 (standard) Nominal

½”. Some jurisdictions require R-4.2 or R-6.0 on

installations in a non-conditioned space. Add 1” thick

insulation to the exterior casing of the unit to comply in

these jurisdictions, putting the vapor barrier on the outside.

GENERAL INFORMATION

This horizontal Air Handler unit provides the flexibility for

installation in any horizontal application. The versatile models

may be used with or without electric heat. The direct drive three

(3) speed PSC motor or five (5) speed Constant Torque Motor

will provide an air volume to match any application.

The unit can be positioned for bottom or air return through the

end of the unit in the horizontal position.

Inspection

As soon as the furnace is received, it should be inspected for

possible damage during transit. If damage is evident, the extent

of the damage should be noted on the carrier’s freight bill. A

separate request for inspection by the carrier’s agent should be

made in writing. Before installing the air handler you should

check the cabinet for screws or bolts which may have loosened

in transit. Some units have blower motor supports over the

motor shaft. Remove support before operating the horizontal Air

Handler unit.

See local Distributor for more information. Mortex Products,

Inc assumes no liability for freight damage.

Check the connecting of the wiring, electric heater, ducts or

piping to make sure there is easy access to the horizontal Air

Handler unit during the installation.

CASED ENCLOSURE MOUNTING

The installer must adhere strictly to all local and national code

requirements pertaining to the installation of this equipment.

These enclosures are designed to be installed in the ceiling for

horizontal mounting only.

Location of the unit must be in an area providing adequate

access to the ceiling panel since all components must be

serviced from this area.

The enclosure should be lifted to the desired location and

secured using the mounting holes located on the top with an

acceptable mounting method (Figure 1). The enclosure must be

level in both directions to permit proper drainage of the Air

Handler.

After the enclosure is mounted a 2x2 or 2x4 frame must be

installed around the base of the enclosure to create an air tight

seal and support for ceiling panel frame. Figure 1 shows a

typical arrangement for the framing required.

Figure 1: Cased Enclosure Mounting

ALWAYS SHUT OFF ELECTRICITY AT THE

DISCONNECT SWITCH OR TURN OFF THE CIRCUIT

BREAKERS IN THE MAIN ELECTRICAL ENTRANCE

BEFORE PREFORMING ANY SERVICE ON THE

PPLIANCE.

Extreme caution must be taken that no internal

damage will result if screws or holes are drilled into

the cabinet.

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CASED ENCLOSURE WITH AIR HANDLER IS

FACTORY MOUNTED “ONLY”

NOTE: Before mounting the enclosure check to see if the Air

Handler unit is fully engaged into the supply duct flange. Total

engagement is when the front of the top plate and the front of

the drain pan are squeezing against the insulation. Also check to

make certain that the Air Handler unit is secured firmly to the

enclosure with sheet metal screws through the mounting angle.

Refer to enclosure mounting instructions on page 3.

UNCASED AIR HANDLER MOUNTING

It is important to ensure that the Air Handlers are securely

mounted and the structure is sufficient to support the weight of

the Air Handler unit. All anchors for mounting the Air Handler

unit must be placed and sized to ensure a safe and durable

installation.

These Air Handler units are provided with four (4) mounting

slots. Metal washers and nuts of the proper size are to be

provided by the installer. If the Air Handler unit is not level use

shims to obtain proper level. This will ensure that the

condensate will drain from the unit.

Model No. Nominal

Tons Blower

CFM @

0.2" ESP

With Coil

Nominal Heating

Capacity in kW

SEHX-18-XX-0A-0C79 1.50 1/4 720 00, 03, 05, 06, 08, 10

SEHX-19-XX-0E-0C79 1.58 1/4 805 00, 03, 05, 06, 08, 10

SEHX-24-XX-09-0C79 2.00 1/4 850 00, 03, 05, 06, 08, 10

SEHX-25-XX-0H-0C65 2.08 1/4 1040 00, 03, 05, 06, 08, 10

SEHX-30-XX-0J-0C65 2.50 1/4 1055 00, 03, 05, 06, 08, 10

SEHX-31-XX-05-0C65 2.58 1/4 1040 00, 03, 05, 06, 08, 10

SEHX-34-XX-0K-0C65 2.83 1/4 1084 00, 03, 05, 06, 08, 10

SEHX-35-XX-01-0C65 2.92 1/4 1049 00, 03, 05, 06, 08, 10

SEHX-36-XX-0K-0C65 3.00 1/4 1100 00, 03, 05, 06, 08, 10

SEHX-37-XX-01-0C65 3.08 1/4 1065 00, 03, 05, 06, 08, 10

Table 1: SEHX General Specifications

Model No. Nominal

Tons Blower

CFM @

0.2" ESP

With Coi

Nominal Heating

Capacity in kW

CEHX-18-XX-0A-0C79 1.50 1/4 720 00, 03, 05, 06, 08, 10

CEHX-19-XX-0E-0C79 1.58 1/4 805 00, 03, 05, 06, 08, 10

CEHX-24-XX-09-0C79 2.00 1/4 850 00, 03, 05, 06, 08, 10

CEHX-25-XX-0H-0C65 2.08 1/4 1040 00, 03, 05, 06, 08, 10

CEHX-30-XX-0J-0C65 2.50 1/4 1055 00, 03, 05, 06, 08, 10

CEHX-31-XX-05-0C65 2.58 1/4 1040 00, 03, 05, 06, 08, 10

CEHX-34-XX-0K-0C65 2.83 1/4 1084 00, 03, 05, 06, 08, 10

CEHX-35-XX-01-0C65 2.92 1/4 1049 00, 03, 05, 06, 08, 10

CEHX-36-XX-0K-0C65 3.00 1/4 1100 00, 03, 05, 06, 08, 10

CEHX-37-XX-01-0C65 3.08 1/4 1065 00, 03, 05, 06, 08, 10

Table 2: CEHX General Specifications

Model No. Nominal

Tons Blower

CFM @

0.2" ESP

With Coil

NominalHeating

Capacity in kW

SCWE-18-XX-0A-0C79 1.50 1/4 720 00, 03, 05, 06, 08, 10

SCWE-19-XX-0E-0C79 1.58 1/4 805 00, 03, 05, 06, 08, 10

SCWE-24-XX-09-0C79 2.00 1/4 850 00, 03, 05, 06, 08, 10

SCWE-25-XX-0H-0C65 2.08 1/4 1040 00, 03, 05, 06, 08, 10

SCWE-30-XX-0J-0C65 2.50 1/4 1055 00, 03, 05, 06, 08, 10

SCWE-31-XX-05-0C65 2.58 1/4 1040 00, 03, 05, 06, 08, 10

SCWE-34-XX-0K-0C65 2.83 1/4 1084 00, 03, 05, 06, 08, 10

SCWE-35-XX-01-0C65 2.92 1/4 1049 00, 03, 05, 06, 08, 10

SCWE-36-XX-0K-0C65 3.00 1/4 1100 00, 03, 05, 06, 08, 10

SCWE-37-XX-01-0C65 3.08 1/4 1065 00, 03, 05, 06, 08, 10

Table 3 SCWE General Specifications

Model No. Nominal

Tons Blower

CFM @

0.2" ESP

With Coil

NominalHeating

Capacity in kW

CCWE-18-XX-0A-0C79 1.50 1/4 720 00, 03, 05, 06, 08, 10

CCWE-19-XX-0E-0C79 1.58 1/4 805 00, 03, 05, 06, 08, 10

CCWE-24-XX-09-0C79 2.00 1/4 850 00, 03, 05, 06, 08, 10

CCWE-25-XX-0H-0C65 2.08 1/4 1040 00, 03, 05, 06, 08, 10

CCWE-30-XX-0J-0C65 2.50 1/4 1055 00, 03, 05, 06, 08, 10

CCWE-31-XX-05-0C65 2.58 1/4 1040 00, 03, 05, 06, 08, 10

CCWE-34-XX-0K-0C65 2.83 1/4 1084 00, 03, 05, 06, 08, 10

CCWE-35-XX-01-0C65 2.92 1/4 1049 00, 03, 05, 06, 08, 10

CCWE-36-XX-0K-0C65 3.00 1/4 1100 00, 03, 05, 06, 08, 10

CCWE-37-XX-01-0C65 3.08 1/4 1065 00, 03, 05, 06, 08, 10

Table 4 CCWE General Specifications

Available Blower Motors on Electric Heat Models

1. Standard Blower Motor - – 3 SPD PSC Motor

2. Optional Blower Motor 5 SPD Constant Torque

Motor

Model No. Nominal

Tons Blower

CFM @

0.2" ESP

With Coil

Nominal Hot Water

Capacity in BTU/H

@140 DEGF EWT

SDXW-18-21-0A-0A78 1.50 1/4 720 21,000

SDXW-19-22-0E-0A78 1.58 1/4 805 22,000

SDXW-24-23-09-0A78 2.00 1/4 850 23,000

SDXW-25-23-0H-0A70 2.08 1/4 1040 23,000

SDXW-30-27-0J-0A70 2.50 1/4 1055 27,000

SDXW-31-28-05-0A70 2.58 1/4 1040 28,000

SDXW-34-30-0K-0A70 2.83 1/4 1084 30,000

SDXW-35-30-01-0A70 2.92 1/4 1049 30,000

SDXW-36-32-0K-0A70 3.00 1/4 1100 32,000

SDXW-37-32-01-0AC70 3.08 1/4 1065 32,000

Table 5: SDXW General Specifications

Model No. Nominal

Tons Blower

CFM @

0.2" ESP

With Coi

NominalHot Water

Capacity in BTU/H

@140 DEGF EWT

CDXW-18-21-0A-0A78 1.50 1/4 720 21,000

CDXW-19-22-0E-0A78 1.58 1/4 805 22,000

CDXW-24-23-09-0A78 2.00 1/4 850 23,000

CDXW-25-23-0H-0A70 2.08 1/4 1040 23,000

CDXW-30-27-0J-0A70 2.50 1/4 1055 27,000

CDXW-31-28-05-0A70 2.58 1/4 1040 28,000

CDXW-34-30-0K-0A70 2.83 1/4 1084 30,000

CDXW-35-30-01-0A70 2.92 1/4 1049 30,000

CDXW-36-32-0K-0A70 3.00 1/4 1100 32,000

CDXW-37-32-01-0A70 3.08 1/4 1065 32,000

Table 6: CDXW General Specifications

It is recommended that the enclosure and Air Handler

be protected (covered) during the dry wall and

painting process to prevent the spraying of the

material into the enclosure and on the Air Handle

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Model No. Nominal

Tons Blower

CFM @

0.2" ESP

With Coil

NominalHot Water

Capacity in BTU/H

@140 DEGF EWT

SCWW-18-21-0A-0A78 1.50 1/4 720 21,000

SCWW-19-22-0E-0A78 1.58 1/4 805 22,000

SCWW-24-23-09-0A78 2.00 1/4 850 23,000

SCWW-25-23-0H-0A70 2.08 1/4 1040 23,000

SCWW-30-27-0J-0A70 2.50 1/4 1055 27,000

SCWW-31-28-05-0A70 2.58 1/4 1040 28,000

SCWW-34-30-0K-0A70 2.83 1/4 1084 30,000

SCWW-35-30-01-0A70 2.92 1/4 1049 30,000

SCWW-36-32-0K-0A70 3.00 1/4 1100 32,000

SCWW-37-32-01-0A70 3.08 1/4 1065 32,000

Table 7 SCWW General Specifications

Model No. Nominal

Tons Blower

CFM @

0.2" ESP

With Coil

Nominal Hot Water

Capacity in BTU/H

@140 DEGF EWT

CCWW-18-21-0A-0A78 1.50 1/4 720 21,000

CCWW-19-22-0E-0A78 1.58 1/4 805 22,000

CCWW-24-23-09-0A78 2.00 1/4 850 23,000

CCWW-25-23-0H-0A70 2.08 1/4 1040 23,000

CCWW-30-27-0J-0A70 2.50 1/4 1055 27,000

CCWW-31-28-05-0A70 2.58 1/4 1040 28,000

CCWW-34-30-0K-0A70 2.83 1/4 1084 30,000

CCWW-35-30-01-0A70 2.92 1/4 1049 30,000

CCWW-36-32-0K-0A70 3.00 1/4 1100 32,000

CCWW-37-32-01-0A70 3.08 1/4 1065 32,000

Table 8 CCWW General Specifications

Available Blower Motors on Hot Water Heat Models

1. Standard Blower Motor - – 3 SPD PSC Motor

2. Optional Blower Motor 5 SPD Constant Torque

Motor

Figure 2: CEHX/ CCWE/ CDXW/ CCWW DIMENSIONAL DATA DX OR CHILLER WATER COOLING WITH

OR WITHOUT ELECTRIC HEAT

ABCDEFGH

CEHX / CCWE / CDXW / CCWW - 18 41 2.625 7.125 4 3 5.25 2.625 3.75

CEHX / CCWE / CDXW / CCWW - 19 41 2.625 7.125 4 3 5.25 2.625 3.75

CEHX / CCWE / CDXW / CCWW - 24 41 2.625 7.125 4 3 5.25 2.625 3.75

CEHX / CCWE / CDXW / CCWW - 25 47 2 10.5 2.5 1.5 4.625 2 2.6875

CEHX / CCWE / CDXW / CCWW - 30 47 2 10.5 2.5 1.5 4.625 2 2.6875

CEHX / CCWE / CDXW / CCWW - 31 47 2 10.5 2.5 1.5 5.875 2 2.6875

CEHX / CCWE / CDXW / CCWW - 34 53.5 3.25 13.75 3.25 2.75 5.875 3.25 3.9375

CEHX / CCWE / CDXW / CCWW - 35 53.5 3.25 13.75 3.25 2.75 5.875 3.25 3.9375

CEHX / CCWE / CDXW / CCWW - 36 60.5 3.25 17.5 3.25 2.75 5.875 3.25 3.9375

CEHX / CCWE / CDXW / CCWW - 37 60.5 3.25 17.5 3.25 2.75 5.875 3.25 3.9375

Model Number Physical Dimensions

Table 9: CEHX/ CCWE/ CDXW/ CCWW DIMENSIONAL DATA

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Figure 3: SEHX/ SCWE/ SDXW/ SCWW DIMENSIONAL DATA DX OR CHILLED WATER COOLING WITH

OR WITHOUT ELECTRIC HEAT

Liquid

Line Suction

Line Evap.

Rows A B C Ship

Weight

SEHX / SCWE / SDXW / SCWW - 18 3/8 3/4 3 37 34.25 30 60

SEHX / SCWE / SDXW / SCWW - 19 3/8 3/4 4 37 34.25 30 65

SEHX / SCWE / SDXW / SCWW - 24 3/8 3/4 3 37 34.25 30 60

SEHX / SCWE / SDXW / SCWW - 25 3/8 3/4 4 45 42.25 38 75

SEHX / SCWE / SDXW / SCWW - 30 3/8 3/4 3 45 42.25 38 70

SEHX / SCWE / SDXW / SCWW - 31 3/8 3/4 4 45 42.25 38 75

SEHX / SCWE / SDXW / SCWW - 34 3/8 3/4 3 49 46.25 42 74

SEHX / SCWE / SDXW / SCWW - 35 3/8 3/4 4 49 46.25 42 80

SEHX / SCWE / SDXW / SCWW - 36 3/8 3/4 3 56 53.25 49 85

SEHX / SCWE / SDXW / SCWW - 37 3/8 3/4 4 56 53.25 49 90

Model Number Physical Dimensions

Table 10: SEHX/ SCWE/ SDXW/ SCWW DIMENSIONAL DATA

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EHXS2 4 0 3 ED1C79

SERIES

S - Horizontal Firdown Unit Uncased

C - Horizontal Firdown Unit Cased

TYPE

EHX - DX Coil andElectric Heat

CWE - Chilled Water Coil and Electric Heat

DXW - DX Coil and Hot Water Heat

CWW - Chilled Water Coil and Hot Water Heat

Tons

Nominal Cooling BTUH

Heating Capacity

03 - Electric Heat Capacity in kW

26 - Hot Water Heat Capacity in M/BTUH

Orifice or Expansion Valve Number

D - TXV4-A (E410A 1.5 to 2.5 Ton)

Y - TXV4-A (R410A 3.0 Ton)

Expansion Device Code

E = Expansion Valve (DX)

Time DelayRelay

1 - With TDR (Standard)

Unit Voltage

A - 115/1/60

C - 208/240/1/60

Motor&WheelCode

65 - 1/4 HP, 208/240V, PSC, with (2) 6.25x8.00

70 - 1/4 HP, 115V, PSC, with (2) 6.25x8.00

78 - 1/4 HP, 115V, PSC, with (2) 6.25x6.88

79 - 1/4 HP, 240V, PSC, with (2) 6.25x6.88

80 - 1/3 HP, 208/230V, CT, with (2) 7.00x8.00

81 - 1/2 HP, 208/240V,CT, with (2) 7.00x9.00

82 - 1/3 HP, 115V,CT, with (2) 7.00x8.00

83 - 1/2 HP, 115V,CT, with (2) 7.00x9.00

2 = 2 Pipe Chilled Water (CW)

4 = 4 Pipe Chilled Water (CW)

4 - 4 Row ChilledWater Coil (CW)

5 - 5 Row ChilledWater Coil (CW)

Table 11: SEHX/CEHX/SCWE/CCWE/SDXW/CDXW/SCWW/CCWW Model Nomenclature

SECTION IlI: CLEARANCE AND RETURN

AIR REQUIREMENTS

LOCATION

Access for servicing is an important factor in the location of any

Air Handler unit. Provide a minimum of 27 inches under the

appliance for access to the control box, heating elements, water

pump, blower and air filters. The unit can be serviced entirely

from the bottom of the unit, including replacing the air filter on

models that include a filter rack. These units are NOT designed

to be installed in a closet or flush mounted in a wall in an up

flow vertical position. The Air Handler unit is designed for

horizontal application ONLY.

Be sure to route primary and secondary drain connections

so as not to obstruct replacement filter.

Location is usually predetermined. Check with owner’s or

dealer’s installation plans. If location has not been decided,

consider the following in choosing a suitable location.

1. Select a location with adequate structural support, space for

service access, clearance for return and supply duct

connections. Unit is designed to fit in a 12” high drop down

space (Furred-In Area).

2. Where normal operating sound levels may be objectionable

if the Air Handler is placed directly over or under some

rooms such as bedrooms, study, etc.

3. Caution should be taken to locate the Air Handler unit so

that supply and return air ducts can deliver an even air

distribution of supply and return air to and from the living

spaces.

4. Locate appliance where electrical supply wiring can be

easily routed to main electrical panel and where electrical

wiring will not be damaged. Supply power wiring may be

installed in a flexible conduit or armored cable. The

installer must refer to National Electrical Code (NFPA 70),

Canadian Electrical Code, Part I (CSA C22.2), ANSI/NFPA

No. 70 and/or any local codes to ensure supply wiring

complies with all applicable codes for the location the

Horizontal Air Handler is being installed.

5. Locate appliance where thermostat wiring can be easily

routed to the thermostat and where the wiring will not be

damaged. Be sure wire has enough length so it will not to

block access to any components that may need to be

replaced or serviced.

6. Locate appliance where refrigerant lines can be easily

routed from the evaporator coil to the condenser.

7. When the coil is installed in a blow-thru application it will

create a positive pressure situation in the condensate drain

system. To prevent condensate from being blown out of the

condensate drain, it is recommended an anti-siphon air vent

be installed as shown in figure 16. This will allow proper

draining of the primary (Main) and secondary (Overflow)

drain lines. Refer to CONDENSATE DRAIN SYSTEM

and Figure 16 in these instructions.

NOTE: The condensate drain trap is not required on a

blow-thru system providing the drain pipe is not connected

to a sewer line.

NOTE: The condensate trap may be required by local

codes.

If the secondary drain is not used, it must be capped.

8. The blow-thru design will cause exterior surface of cabinet

to sweat when units is installed in a non-conditioned space

such as an attic or garage. Installer must provide protection

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such as full size auxiliary drain pan on all units installed in

a non-conditioned space to prevent damage from

condensation runoff.

9. All return air must be filtered to prevent a buildup of dirt on

the coil surface.

Appliance Clearances

This appliance is approved for zero (0) inches clearance to

combustible material on any part of the air handler exterior

casing and the inlet or outlet ducts providing NO electric heater

is being used. There is a one (1) inch clearance on the supply

plenum and supply air duct when an electric heater is installed

in the appliance. Refer to Table 12 for the clearance to

combustibles.

Figure 4: Clearance – Access for Service

Table 12: Clearance to Combustibles

Un-cased Horizontal Air Handler Return Air

The uncased Air Handler unit can have a non metallic ducted

return that can have a return air opening that is located between

the joists and the sheet rock that can carry the return air from a

return air filter grille in a ceiling to the horizontal Air Handler

unit.

Provisions shall be made in this type of return air system is

large enough to permit the air in the rooms and the living

spaces to return to the Air Handler unit. Failure to comply

may cause a reduction in the amount of return air available to

the blower, causing reduced air flow resulting in improper

heating and cooling of the living space. The reduced air flow

may cause the furnace to cycle on the limit causing premature

heating element failure and/or condensate water blow off.

The return air grille or duct can never be located in a closet.

Cased Horizontal Air Handler Return Air

The cased horizontal Air Handler unit can use the louvered

ceiling access panel on the horizontal Air Handler unit as a

means of returning the conditioned air from the living space to

the Air Handler unit.

The cased horizontal Air Handler unit can also have a non-

louvered ceiling access panel with the return air ducted using a

return plenum and duct system. The ducted return air can be

located straight down to the ceiling where it is terminated using

a return air filter grille. The ducted return can also travel

through the space between the joists and sheet rock and be

terminated with a return air filter grille located away from the

horizontal Air Handler unit.

Provisions shall be made in the duct system to ensure it is

large enough permit the proper amount of air to be returned

from the living spaces to the horizontal Air Handler unit.

Failure to comply may cause a reduction in the amount of

return air available to the blower, causing reduced air flow

resulting in improper heating of the living space. The reduced

air flow may cause the furnace to cycle on the limit causing

premature heating element failure.

Air Filter Location

Horizontal Air Handler Units are not factory equipped with an

air filter. The air filter can be installed on the louvered ceiling

access panel or the air filters can be located remotely in the

return air filter grille.

If a non metallic return system or a ducted return system is

installed and a return air filter grille is used at the opposite end

of the duct a non-louvered ceiling access panel will be required.

The louvered ceiling panel air filter sizes for the SEHX, CEHX,

SCWE and the CCWE models are 20” x 20” x 1”

The recommended minimum filter size for a return air filter

grille is:

Standard Throw away Air Filter @ 300 ft/min or less

600 CFM = 16 x 20 x 1

700 CFM = 20 x 20 x 1

800 CFM = 20 x 20 x 1

900 CFM = 20 x 24 x 1

1000 CFM = 20 x 24 x 1

Pleated filters are not recommended for use with PSC Motors

NON METALIC DUCTED RETURN SYSTEMS MAY

NOT BE ALLOWED IN SOME STATES, COUNTIES,

OR CITIES.

CHECK ALL STATE, LOCAL AND FIRE CODES TO

DETERMINE IF THIS TYPE OF RETURN SYSTEM IS

ALLOWED WHERE THE HORIZONTAL AIR

HANDLER UNIT IS BEING INSTALLED.

FIRE HAZARD:

NON METALIC DUCTED RETURN SYSTEMS WILL

COLLECT DUST AND DEBRIS WHICH CAN RESULT

IN A FIRE HAZARD. BE SURE TO THOROUGHLY

CLEAN THIS SYSTEM TO REMOVE ALL DUST AND

DEBRIS ANNUALLY.

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Figure 5: Ceiling Access Panel.

Table 13: Optional Ceiling Access Panels.

SECTION IV: AIR HANDLER & SUPPLY AIR

DUCT INSTALLATION

CASED AIR HANDLER SUPPLY DUCT

CONNECTIONS:

The horizontal Air Handler case can be mounted into the ceiling

so there can be a horizontal left supply air flow or a horizontal

right supply air flow. The supply plenum is attached and secured

to the horizontal Air Handler case duct flanges by use of screws.

Use a Non-tape sealant such as mastic or an aerosol sealant to

seal the plenum to prevent air leakage. The supply plenum must

be the same size as the supply air opening.

The supply duct system must be designed as to maintain a 0.20

inches of water static pressure through the entire supply duct

system.

The supply air ducts are must be properly sized to carry the

proper amount of air from the horizontal Air Handler unit to the

conditioned spaces. If a hole is to be cut in the supply plenum

the hole needs to be the same size as the supply duct(s). Use a

duct starting collar to attach the ducts to the plenum. Use a Non-

tape sealant such as mastic or an aerosol sealant to seal the

plenum to prevent air leakage.

If the cased horizontal Air Handler unit installed in an un-

conditioned space be sure the supply and return duct system is

insulated and installed in accordance with local codes.

UN-CASED AIR HANDLER SUPPLY DUCT

CONNECTIONS:

The horizontal Air Handler case can be mounted into the ceiling

so there can be a horizontal left supply air flow or a horizontal

right supply air flow. The supply plenum is attached and secured

to the horizontal Air Handler case duct flanges by use of screws.

Use a Non-tape sealant such as mastic or an aerosol sealant to

seal the plenum to prevent air leakage. The supply plenum must

be the same size as the supply air opening.

The supply duct system must be designed as to maintain a 0.20

inches of water static pressure through the entire supply duct

system.

The supply air ducts are must be properly sized to carry the

proper amount of air from the horizontal Air Handler unit to the

conditioned spaces. If a hole is to be cut in the supply plenum

the hole needs to be the same size as the supply duct(s). Use a

duct starting collar to attach the ducts to the plenum. Use a duct

starting collar to attach the ducts to the plenum. Use a Non-tape

sealant such as mastic or an aerosol sealant to seal the plenum to

prevent air leakage.

If the horizontal Air Handler unit installed in an un-conditioned

space be sure the supply and return duct system is insulated and

installed in accordance with local codes.

USING THE LOUVERED CEILING ACCESS PANEL

FOR AIR RETURN WILL RESULT IN A VERY LOUD

AND NOISY SITUATION.WHEN THE AIR HANDLER

UNIT IS OPERATING.

USING A DUCTED RETURN WILL RESULT IN A

MUCH QUITEIER SITUATION WHEN THE AIR

HANDLER UNIT IS OPERATING.

IMPACT HAZARD

Use extreme caution when removing the Ceiling

Access Panel screws. The panel is secured to the

frame assembly with the thumb screws. Once the

thumb screws have been removed the Ceiling Access

Panel will swing down very quickly. Anyone that

standing under the Ceiling Access Panel will get hit

with the panel unless the panel is supported by holding

it with their hands.

The louvers can also have sharp edges which can cut

hands or fingers. The use of gloves is recommended

when servicing the horizontal Air Handler unit.

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SECTION V: AIR HANDLER INSTALLATION

Installing the Air Handler Unit

Ceiling Installation

If installed in a ceiling, the area in the ceiling where the unit is

to be located should have a framed in structure all around the

unit so the Air Handler unit can be properly mounted and

secured. The ceiling must be 12 inches in height. Prior to

installing the furnace make sure the holes are cut into the frame

for the refrigerant tubing, the drain line, the electrical wiring, the

thermostat wiring and the condenser control wiring. Care should

be taken to insure unit is level to permit proper condensate

drainage.

To properly install the cased horizontal Air Handler unit you

must do the following:

1. Remove the top shipping cover and corner posts.

2. Remove the bottom shipping cover.

3. Remove the control box access panel.

4. Use screws to secure the four (4) straps to the ceiling where

the horizontal Air Handler unit will be installed. Be sure the

straps are located so the hooks in the straps line up with the

slots in the base of the horizontal Air Handler unit.

5. Raise the horizontal Air Handler unit into the space where it

is going to be installed and put the hooks into the slots in

the base. Bend the hooks back to keep the hooks from

slipping out of the slots in the base.

6. Connect the supply air plenum to the horizontal Air

Handler unit as described in cased Air Handler supply duct

connections.

7. If the louvered ceiling access panel is not being used and

solid ceiling access panels is being used then, connect the

return air plenum to the horizontal Air Handler unit as

described in cased Air Handler return air duct connections.

8. Connect the electrical supply wires and the thermostat

control wires in the control box. Be sure to install an

ON/OFF switch in the supply circuit to disconnect the

power during servicing.

9. Connect the refrigerant lines or chilled water lines to the

coil.

10. Re-install the ceiling access panel and control box access

panel and secure with the screws that were removed in step

11. Turn the power on to the unit by following the procedure in

the Users Information Manual.

12. Set the thermostat to the desired temperature.

To properly install the un-cased horizontal Air Handler unit you

must do the following:

1. Remove the top shipping cover and corner posts.

2. Remove the screws from the control box cover and remove

the cover.

3. Remove the bottom shipping cover.

4. Use four (4) lag bolts with washers to go thru the slots in

the top cover that secure the horizontal Air Handler unit to

the ceiling where the horizontal Air Handler unit will be

installed.

5. Raise the horizontal Air Handler unit into the space where it

is going to be installed and install the lag bolts thru the slots

in the top cover. Tighten the lag bolts until the horizontal

Air Handler unit is securely fastened to the ceiling.

6. Connect the supply air plenum to the horizontal Air

Handler unit as described in cased Air Handler supply duct

connections.

7. Connect the electrical supply wires and the thermostat

control wires in the control box. Be sure to install a

ON/OFF switch in the supply circuit to disconnect the

power during servicing.

8. Connect the refrigerant lines or chilled water lines to the

coil.

9. Install the control box access panel and secure with the

screws that were removed in Step 2.

10. Install the ceiling access panel and secure to the ceiling

frame with the thumb screws.

NOTE: Ceiling Access Panel is shipped separately. It is not

included with the Air Handler Unit.

11. Turn the power on to the unit by following the procedure in

the Users Information Manual.

12. Set the thermostat to the desired temperature.

SECTION VI: COOLING AND REFRIGERANT

PIPING

DX Cooling / Chilled Water Cooling

DX Refrigerant Piping:

Horizontal Air Handler Units with DX type evaporator coils

require liquid and suction piping sized in accordance with

condensing unit manufacturer’s instructions. The evaporator

coils have sweat copper connections. Refrigerant lines should be

soldered with silver solder or high temperature brazing alloy.

Suction line must be insulated to avoid condensate from forming

and dropping off. Armaflex (or equivalent) with 3/8” (1 cm)

minimum wall thickness is recommended. In severe conditions

such as hot or high humidity areas require 1/2” (1.3 cm)

minimum wall thickness may be required. If condensing unit is

installed above evaporator coil then oil traps are required at

equal intervals along suction line (see Figure 6). Horizontal

suction lines should slope 1 inch for every 20 feet toward

condensing unit. Manufacturer recommends that dry nitrogen be

flowed through refrigerant lines during soldering operation.

Figure 6 Evaporator Below Condenser Piping

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