Table of Contents
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Horizontal Air Handler Models:
SEHX - DX Cooling w/ Electric Heat, Uncased
CEHX - DX Cooling w/ Electric Heat, Cased
SCWE - Chilled Water Cooling w/Electric Heat, Uncased-2P
CCWE - Chilled Water Cooling w/Electric Heat, Cased-2P
3 - SEHX/SCWE Dimension Data Chill Water w/ or w/o Elect Heat 6
13 - Diagram of the Heating Cycle of a Heat Pump SHL Switch Loc 14
15 - SCWW/CCWW Chilled Water Capacity 4&5 Row Coil - C.T. 17
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.
MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106
INSTALLATION MANUAL
SDXW - DX Cooling w/ Hot Water Heat, Uncased
CDXW - DX Cooling w/ Hot Water Heat, Cased
SCWW - Chilled Water Cooling w/Hot Water Heat, Uncased-4P
CCWW - Chilled Water Cooling w/Hot Water Heat, Cased-4P
LIST OF SECTIONS
1
2
7
9
10
10
LIST OF FIGURES
3
5
23 - Same TStat, Separate Trans, Separate Air Handler & Cool Units 28
8
9
10
11
27 - White Rodgers Multistage Heat / Cool / HP T'stat Connections 30
12
13
13
14
14
15
35 - Wire Diagram 3kW-10kW Electric HT- PSC Motor w/ Lockout 35
15
16
26
38 - Wire Diagram 3kW-10kW Electric HT- C.T. Motor w/ Lockout 37
27
27
LIST OF TABLES
4
4
4
4
4
4
5
5
24 - Wiring Requirements 208/240 VAC Electric Heat 18-37 Models 25
5
6
7
8
9
16
30 - Typical Air Handler Unit TStat Pigtail Wire Colors & Connect 31
18
19
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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Page 1
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Table of Contents
Related Manuals for Suntherm SEHX
Summary of Contents for Suntherm SEHX
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Page 1: Table Of Contents
2 – CEHX/CCWE Dimension Data DX Cool w/ or w/o Elect Heat 22 – Separate TStat & Trans.; Separate Air Handler and Cooling 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 –... -
Page 2: Safety, Mounting, General, Dimensional & Nomenclature Info
CAUTION: indicated a potentially hazardous situation, which if SunTherm assumes no responsibility for units installed in not avoided, may result in minor or moderate injury. It is also violation of any code or regulation. -
Page 3: Cased Enclosure Mounting
some instances these instructions exceed certain local codes As soon as the furnace is received, it should be inspected for and ordinances, especially those who have not kept up with possible damage during transit. If damage is evident, the extent changing home construction practices. -
Page 4: Sehx General Specifications
00, 03, 05, 06, 08, 10 2. Optional Blower Motor 5 SPD Constant Torque SEHX-37-XX-01-0C65 3.08 1065 00, 03, 05, 06, 08, 10 Motor Table 1: SEHX General Specifications CFM @ Nominal Hot Water Nominal Blower Model No. 0.2" ESP Capacity in BTU/H... -
Page 5: Cehx/Ccwe Dimension Data Dx Cool W/ Or W/O Elect Heat
CFM @ Nominal Hot Water CFM @ Nominal Hot Water Nominal Blower Nominal Blower Model No. 0.2" ESP Capacity in BTU/H Model No. 0.2" ESP Capacity in BTU/H Tons Tons With Coil @140 DEGF EWT With Coil @140 DEGF EWT SCWW-18-21-0A-0A78 1.50 21,000... -
Page 6: Sehx/Scwe/Sdxw/Scww Dimensional Data
Figure 3: SEHX/ SCWE/ SDXW/ SCWW DIMENSIONAL DATA DX OR CHILLED WATER COOLING WITH OR WITHOUT ELECTRIC HEAT Physical Dimensions Liquid Suction Evap. Ship Model Number Line Line Rows Weight SEHX / SCWE / SDXW / SCWW - 18 34.25 SEHX / SCWE / SDXW / SCWW - 19 34.25... -
Page 7: Clearance And Return Air Requirements
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 Table 11: SEHX/CEHX/SCWE/CCWE/SDXW/CDXW/SCWW/CCWW Model Nomenclature wiring will not be damaged. Supply power wiring may be SECTION IlI: CLEARANCE AND RETURN installed in a flexible conduit or armored cable. -
Page 8: Clearance - Access For Service
FIRE HAZARD: The louvered ceiling panel air filter sizes for the SEHX, CEHX, NON METALIC DUCTED RETURN SYSTEMS WILL SCWE and the CCWE models are 20” x 20” x 1”... -
Page 9: Air Handler And Supply Air Duct Installation
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 Figure 5: Ceiling Access Panel. -
Page 10: Air Handler Installation
6. Connect the supply air plenum to the horizontal Air SECTION V: AIR HANDLER INSTALLATION Handler unit as described in cased Air Handler supply duct Installing the Air Handler Unit connections. 7. Connect the electrical supply wires and the thermostat Ceiling Installation control wires in the control box. -
Page 11: The Txv Bulb Best Placement
of these system variables will lead to poor system performance SPECIAL INSTRUCTIONS FOR COILS WITH and possible compressor failure. THERMAL EXPANSION VALVES (TXV) The TXV responds to the temperature of refrigerant gas as it Thermal expansion valve (TXV) have a built in check valve leaves the evaporator. -
Page 12: Txv Sensing Bulb Location
Check to see if airflow through the system is good. There should Plugged dryer or strainer be no dirty coils or air filters. Also check for proper CFMs b. Low condensing temperature readings across the system. HIGH SUCTION PRESSURE – LOW SUPERHEAT Make sure there's the right amount of refrigerant charge in the POSSIBLE CAUSES: system (this step may require weighing out the refrigerant in the... -
Page 13: Typical Txv Connections
Field Installed: of cooling capacities likely to be encountered. The factory 1. After coil pressure has been relieved, turn the female swivel installed orifice piston size is marked on the flowrator nut counter-clockwise to remove. distributor assembly and on the front of the coil carton. 2. -
Page 14: Proper Mounting Of The Shl Temperature Switch
FIELD INSTALLED SUPPLEMENTAL HEAT LOCKOUT (SHL) KIT: Field Installed SHL is to be used with model SEHX and CEHX models with factory installed electric heat used with a heat pump system. The temperature switch is to prevent excessive refrigerant liquid pressures due to the evaporator coil being located after the electric heaters. -
Page 15: Condensate Drain Pan
isolators. Coil water pipes must be adequately vented in order to CONDENSATE DRAIN PIPING: prevent air binding. Units are provided with manual air vents mounted on coil manifold. Horizontal Air Handler Unit must be located so that if any "Massachusetts requires an electronically controlled connections should leak, water will not cause damage to pump timer that activates the pump every 6 hours for 60 seconds and limits the distance between the... -
Page 16: Components And Water Connections
Figure 17: Components and Water Connections Chilled Water Piping: Supply and return chilled water piping to the coil should be ¾ inch ID up to 42,000 BTU’s, 1 inch on units greater than 42,000 BTU’s. Water piping must always be connected so that the entering water is on the leaving side of the coil. Type Chilled Water Capacities @ Entering Evaporator... - Page 17 Type Chilled Water Capacities @ Entering Evaporator Water Temperatures Pressure Pressure Model Number Coil Number of Blower 80°F / 67°F / 45°F 80°F / 67°F / 42°F Drop Water Drop Air Rows Motor Total Sensible Total Sensible (Ft Water) (INWC) 14,700 12,900 15,800...
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Page 18: Scwe/Ccwe Hot Water Capacity 4&5 Row Coil - Psc
Evaporator Type Of Hot Water Capacities @ 65°F Pressure Pressure Model Number Coil Number of Blower Entering Water Temperature Drop Water Drop Air Rows Motor 140°F 160°F 170°F 180°F (Ft Water) (INWC) 33,998 41,000 45,400 49,850 SCWE/CCWE 38,103 46,000 50,900 55,870 18-XX-24- 39,658... -
Page 19: Scwe/Ccwe Hot Water Capacity 4&5 Row Coil - C
Evaporator Type Of Hot Water Capacities @ 65°F Pressure Pressure Model Number Coil Number of Blower Entering Water Temperature Drop Water Drop Air Rows Motor 140°F 160°F 170°F 180°F (Ft Water) (INWC) 33,998 41,000 45,400 49,850 SCWE/CCWE 38,103 46,000 50,900 55,870 18-XX-24- C.T. - Page 20 Chilled Water Capacities @ Entering Evaporator Blower Water Temperatures Pressure Pressure Model Number Coil Number Motor 80°F / 67°F / 45°F 80°F / 67°F / 42°F Drop Water Drop Air of Rows Type Total Sensible Total Sensible (Ft Water) (INWC) 14,700 12,900 15,800...
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Page 21: Scww/Ccww Chilled Water Capacity 4&5 Row Coil - C
Chilled Water Capacities @ Entering Evaporator Blower Water Temperatures Pressure Pressure Model Number Coil Number Motor 80°F / 67°F / 45°F 80°F / 67°F / 42°F Drop Water Drop Air of Rows Type Total Sensible Total Sensible (Ft Water) (INWC) 14,700 12,900 15,800... -
Page 22: 20- Scww/Ccww Hot Water Capacity 4&5 Row Coil Psc
Evaporator Type Of Hot Water Capacities @ 65°F Pressure Pressure Model Number Coil Number of Blower Entering Water Temperature Drop Water Drop Air Rows Motor 140°F 160°F 170°F 180°F (Ft Water) (INWC) 33,998 41,000 45,400 49,850 38,103 46,000 50,900 55,870 SCWW/CCWW 0.29 39,658... -
Page 23: Scww/Ccww Hot Water Capacity 4&5 Row Coil - C
Evaporator Type Of Hot Water Capacities @ 65°F Pressure Pressure Model Number Coil Number of Blower Entering Water Temperature Drop Water Drop Air Rows Motor 140°F 160°F 170°F 180°F (Ft Water) (INWC) 33,998 41,000 45,400 49,850 38,103 46,000 50,900 55,870 SCWW/CCWW C.T. -
Page 24: Line Voltage Wiring
Heating Capacities Coil Type Of Heating (2) Max. Model Number Entering Water Temperatures Rows Blower Motor Fuses 130°F 140°F 150°F 160°F 170°F 180°F SDXW/CDXW-18-21-0A-0A78 18,000 21,100 24,200 27,300 30,500 33,600 SDXW/CDXW-19-22-0E-0A78 19,200 22,500 25,800 29,100 32,400 35,800 SDXW/CDXW-24-23-09-0A78 19,300 22,700 26,000 29,400 32,700... -
Page 25: Wiring Requirements 120 Vac Hydronic Heat 18-37 Models
Table 26: Wiring Requirements – 208/240 VAC Electric Heat 18-37 BTU/H Models + Refer to the National Electrical Code Table 250-95 for Non-Sheathed Conductor Ground Wire. * Ground conductor must be the same size and temperature rating as the other conductors listed in Table 26. Furnace Motor Motor... -
Page 26: Component Locations - Electric Heat Control Box
Cr 2 Cr 1 Cr 2 1.02 1.20 1.28 1.50 12.5 10.9 11.9 13.7 14.9 17.1 20.8 18.2 19.2 22.0 24.0 27.5 SEHX-18/19/24 -1C79 208/240 1.20 1.02 25.0 21.9 22.9 26.2 28.7 32.8 33.3 29.2 30.2 34.5 37.8 43.1 10.0 41.6 36.5... -
Page 27: Component Locations - No Heat Control Box
Figure 19: Component Locations – No Heat Control Box Figure 20: Component Locations – Hydronic Heat Control Box Thermostat wires can enter through the side of the unit. When bringing wiring through the side of the Air Handler unit, cable connectors must be installed to hold wiring in place and to relieve any strain on the wiring. -
Page 28: Separate Tstat, Separate Air Handler And Cooling Units
Do not locate thermostat within three feet of any of the following items: Furnace supply air registers Cooling unit supply air registers Lights or heat lamps Aquariums Televisions, stereo, amplifiers, surround sound systems Stoves or any cooking appliance Refrigerator Washer and/or dryer Hot water tank 10 Sink or near any hot water 11 Within 15 feet of any electric space heater... -
Page 29: Same Tstat, Same Trans, Separate Air Handler & Cooling Units
Figure 24: Same Thermostat and Transformer; Separate Air Handler and Cooling Unit HONEYWELL T8611G2028 Figure 25: Honeywell T9611 Heat Pump Thermostat Connections Table 31: White Rodgers Thermostat Terminal Designations MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106 Page 29 ... -
Page 30: White Rodgers Multistage Heat / Cool T'stat Connections
Figure 26: White Rodgers Multistage Heating / Cooling Thermostat Connections Figure 27: White Rodgers multistage heating / cooling thermostat connections with a two transformers. Remove RH and RC jumper wire when two transformers are being used. Figure 28: White Rodgers Heating / Cooling / Heat Pump Thermostat Connections with a Transformer on Heating Unit. -
Page 31: Typical Cooling Unit Thermostat Wire Colors & Connections
Table 32: Typical Air Handler Unit Thermostat Pigtail Wire Colors and Connections. Table 33: Typical Cooling Unit Thermostat Wire Color Codes and Connections. Table 34: Typical Heat Pump Thermostat Wire Color Codes and Connections. Typical Heating/ Cooling Wiring Connections 3. Install a grommet or a strain relief in the 9/16” diameter 1. -
Page 32: Motor, Blower And Furnace Startup
“C” terminal on the outdoor unit. Fasten the three wires together securely with a wire nut. 12. Connect the Orange (Reversing Valve Solenoid) wire from the thermostat with the Orange wire from the “O” terminal on the condenser unit. Fasten the two wires together securely with a wire nut. -
Page 33: Constant Torque Blower Assembly
6. Connect the Red (24 VAC) supply wire from the thermostat to the Red low voltage pigtail wire on the air handler. Fasten the wires together securely with a wire nut. If the outdoor unit has a red wire or “R” terminal then connect the red wire from the outdoor unit with the Red thermostat wire from the second cable and connect this red wire to the “RC”... -
Page 34: Final System Checkout
11. Insert the new blower motor into the blower mounting Change Motor Speeds – Constant Torque Motor bracket making sure the clips are properly attached to 1. Turn off all electrical supply circuits to the air handler secure the motor to the mount bracket. at the main service (House Circuit Breaker) panel. -
Page 35: Wiring Diagrams
Figure 34 SEHX, CEHX, SCWE, CCWE 18 – 37 – 03kW to 10kW Electric Heat – PSC Blower Motor Figure 35 SEHX, CEHX, SCWE, CCWE 18 – 37 – 03kW to 10kW Electric Heat – PSC Blower Motor w/ Field Installed Electric Heat Lockout Switch MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106 ... -
Page 36: Wire Diagram Hydronic Heat - Psc Motor - W/Fs - No Pump
Figure 36 SDXW, CDXW, SCWW, CCWW - 18 – 37 BTU/H – Hydronic Heat – PSC Blower Motor W/ Freeze Switch – No Water Pump Figure 37 SDXW, CDXW, SCWW, CCWW - 18 – 37 BTU/H – Hydronic Heat – PSC Blower Motor w/ Freeze Switch –... -
Page 37: Wire Diagram Electric Heat - C.t. Motor W/ Fs - No Pump
This diagram for HE / C/SHEX models with Nidec Double Shaft Motor. 61CC0630D Figure 38 SEHX, CEHX, SCWE, CCWE 18 – 37 – 03kW to 10kW Electric Heat – Constant Torque Blower Motor w/ Field Installed Electric Heat Lockout Switch... -
Page 38: Wire Diagram Electric Heat - C.t. Motor W/ Fs And Pump
BMMP - BLOWER MOTOR MALE PLUG BM - BLOWER MOTOR CC - COMPRESSOR CONTACTOR WIRE COLORS CLO - COMPRESSOR LOCKOUT FS - FREEZE STAT RED - RED SunTherm G - GROUND BLK - BLACK Control Box WHT - WHITE GND - GROUND GRN - GREEN...
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