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Suntherm MSVT Series Installation Manual

Multi-position dx and chilled water cooling with hot water heating
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1 - General ...........................................................................................................1
2 - Safety ..............................................................................................................2
5 - Air Handler Installation ............................................................................8
1 - Air Handler Dimensions ...........................................................................5
2 - Clearance - Access for Service ...............................................................6
3 - Closet Clearances .......................................................................................6
5 - Indoor Coil Below Outdoor Unit Piping .............................................8
6 - Typical TXV Connections..........................................................................9
7 - TXV Sensing Bulb Placement ............................................................... 9
8 - Typical Condensate Trap ....................................................................... 10
1 - Hydronic Air Handler Model Specifications ......................................3
2 - Air Handler Model Number Nomenclature.......................................4
3 - Air Handler Dimensional Data ...............................................................5
9 - Htg Cap Boiler Loop No Pump 65°F EAT 180 °F EAT 20°F Δt .... 12
The following list includes important facts and information regarding the air handler models covered in this manual.
1. Air handler is rated for 208/240 VAC at 60 Hertz.
2. Air handler size varies by model.
3. Air handler is designed for A/C or heat pump operation.
4. Air handler is designed for upflow, downflow and
horizontal applications.
5. Air handler must not be operated with the access
panels removed.
6. Air handler is listed by ETL in the United States and Canada.
MORTEX PRODUCTS INC.
501 TERMINAL RD FORT WORTH, TX 76106
INSTALLATION MANUAL
Multi-Position DX and Chilled Water Cooling With Hot Water Heating
Models: MSVT Series With Single-Stage Cooling/Heat Pump Airflow
MSVE Series with Single and 2-Stage Cooling/Heat Pump Air-Flow
SAVE THIS MANUAL FOR FUTURE REFERENCE
LIST OF SECTIONS
7 - Line Voltage Wiring ............................................................................................16
8 - Thermostat Wiring and Connections ..........................................................18
9 - Blower Performance ..........................................................................................21
10 - Blower Motor Speed Selection .....................................................................23
12 - Wiring Diagrams ................................................................................................ 25
LIST OF FIGURES
14 - ECM Motor Control Plug Pin Positions .................................................23
15 - ECM Control Board Layout ........................................................................23
16 - Constant Torque Motor Terminals..........................................................24
17 - Wiring Diagram: MSVE 18 - 36; ECM Mtr; No Choke; No Pump ..25
22 - Wiring Diagram: MSVT 18 - 36 / C.T. Mtr; No Pump; No Choke ..27
24 - Wiring Diagram: MSVT 37 - 60; C.T. Motor; w/Choke/No Pump 28
LIST OF TABLES
17 - Typical Heat/Cool T-stat Wire Colors & Low Voltage Connections . 19
21 - ECM Motor Control Connector Terminals ...................................... 23
22 - Constant Torque Motor Terminal Connections ............................ 24
SECTION 1: GENERAL
7. This air handler is for use at elevations of 10,000 ft (3,048m)
or less.
8. This appliance is not to be used by persons (including children)
with reduced physical, sensory or mental capabilities, or lack
of experience and knowledge, unless they have been given
supervision or instruction concerning use of this appliance by
a person responsible for their safety. Children must not be
allowed to play with this appliance.
9700771
Page 1

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  • Page 1: Table Of Contents

    INSTALLATION MANUAL Multi-Position DX and Chilled Water Cooling With Hot Water Heating Models: MSVT Series With Single-Stage Cooling/Heat Pump Airflow 9700771 MSVE Series with Single and 2-Stage Cooling/Heat Pump Air-Flow LIST OF SECTIONS 1 – General ......................1 7 – Line Voltage Wiring ....................16 8 –...

  • Page 2: Safety

    NOTE: All applicable codes take precedence over any recommendation made in these instructions. DANGER: Indicates an imminently hazardous situation, which SunTherm assumes no responsibility for air handlers installed in if not avoided, will result in death or serious injury. violation of any code or regulation.

  • Page 3: Hydronic Air Handler Model Specifications

    12. Confirm the power supply meets the electrical characteristics GENERAL INFORMATION listed on the air handler rating plate. All models must be This air handler provides the flexibility for installation in an connected to a nominal 115 VAC, 1 Phase, 60-Hertz power upflow or horizontal application and may be used with or supply.

  • Page 4: Air Handler Model Number Nomenclature

    MODEL NUMBER NOMENCLATURE 862T Series MS = Multi-Position Single-Piece Motor Type VT = Variable Constant Torque VE = Variable Speed ECM Unit Size (Capacity in MBTUH) 12 through 24 - Small Cabinet 25 through 36 - Medium Cabinet 37 through 72 - Large Cabinet OS = No Cooling Small Cabinet OM = No Cooling Medium Cabinet OL = No Cooling Large Cabinet...

  • Page 5: Air Handler Dimensions

    Figure 1: Air Handler Dimensions DIMENSIONAL DATA MULTI-POSITION AIR HANDLER HYDRONIC HEAT Model MS**18, 24 17.50 43.00 21.00 15.63 12.50 13.50 11.00 6.75 16.75 14.00 11.00 10.75 2.00 1.50 5.00 16.10 20.20 MS**25, 30, 36 21.00 48.00 21.00 19.00 12.50 14.50 13.00 6.75 20.00 17.00 12.75 10.30 2.30 4.35 5.00 19.90 20.80 MS**37, 42, 48, 60, 72 24.50 58.88 21.75 22.25 14.25 19.75 17.25 6.75 26.00 23.00 16.75 14.35 2.30 4.35 4.50 23.50 20.70 Table 3: Air Handler Dimensional Data...

  • Page 6: Location, Clearances And Return Air Requirements

    8. When the indoor coil is installed in a draw-through application SECTION 3: LOCATION, CLEARANCES AND such is the case with this air handler, it will create a negative RETURN AIR REQUIREMENTS pressure situation in the condensate drain system. To prevent condensate from being drawn into the air handlers and blower, LOCATION it is recommended to trap the primary (main) and secondary...

  • Page 7: Air Handler Orientation And Supply Air Duct Installation

    Air Filter Base Accessory air handler can be field converted to the horizontal left-to-right The SunTherm Air Filter Base Accessory is available as an air-flow position using the procedure below. alternative to a return air filter frame. The Air Filter Base...

  • Page 8: Air Handler Installation

    Introduction block and connect the thermostat cable wires to the low SunTherm air handlers can have a factory installed thermal voltage terminal block or low voltage pigtails. Re-install the coil expansion valve (TXV) or a TXV may be field installed. The factory compartment access panel.

  • Page 9: Typical Txv Connections

    A hard start capacitor on the outdoor unit is normally not Field and Factory Installed TXV Instructions – Sensing Bulb, Leak Check, Evacuation required when a 15% bleed TXV is used, but may be necessary if compressor starting issues are encountered. 1.

  • Page 10: Typical Condensate Trap

    “Massachusetts requires an electronically controlled pump timer that activates the pump every 6 hours for 60 2˝ MIN seconds and limits the distance between the water heater ANTI-SYPH0N AIR VENT and air handler to 50 feet max.” Chilled Water Piping: Supply and return chilled water piping to the coil should be ¾”...

  • Page 11: Chilled Water "A" Coil Cooling Cap. 80/67°F Eat 45°F Ewt

    MODEL NO. TOTAL SENS LATENT WPDS FT. APD IN-WC CW018A8K3 26,650 17,680 8,970 52.7 48.5 0.021 CW024A8K3 32,350 22,190 10,160 54.3 54.0 0.036 CW036A8K3 1200 41,540 30,430 11,110 56.5 56.1 0.049 CW048A8K3 1600 51,940 38,600 13,340 57.6 56.8 0.132 CW060A8K3 2000 63,750 47,340...

  • Page 12: Htg Cap Boiler Loop No Pump 65°F Eat 180 °F Eat 20°F Δt

    MODEL BTUH LAT ° F LWT ° F APD IWC WPD FT ROWS 26,290 116.5 0.07 29,630 113.5 0.09 32,690 111.1 0.12 39,000 137.0 0.10 MS**18 44,500 133.4 0.14 49,600 130.3 0.18 47,500 152.6 0.13 54,740 149.1 0.18 61,510 0.23 29,630 113.5 0.09...

  • Page 13: Htg Cap Boiler Loop No Pump 65°F Eat 180 °F Eat 20°F Δt

    MODEL BTUH LAT ° F LAT ° F APD IWC WPD FT ROWS 1000 52,500 116.4 0.09 1200 59,100 113.4 0.12 1400 65,130 110.9 0.15 1000 72,930 135.2 0.13 1200 83,040 131.8 0.18 MS**37 1400 92,390 128.9 0.23 1000 85,910 147.2 0.17 1200...

  • Page 14: Htg Cap Factory Pump 65°F Eat @ Stated Ewt 1.5, 2 Ton

    MODEL BTUH 120°F BTUH 130°F BTUH 140°F BTUH 150°F BTUH 160° APD IWC ROWS 13,600 16,200 18,840 21,510 24,200 0.07 14,890 17,760 20,660 23,600 26,570 0.09 15,990 19,090 22,230 25,410 28,620 0.12 18,160 21,580 25,000 28,500 32,000 0.10 MS**18 20,170 24,000 27,840 31,700...
  • Page 15 MODEL BTUH120°F BTUH130°F BTUH140°F BTUH150°F BTUH160°F APD IWC ROWS 1000 26,320 31,350 36,430 41,570 46,740 0.09 1200 28,770 34,300 39,900 45,550 51,260 0.12 1400 30,880 36,840 42,880 48,980 55,140 0.15 1000 34,230 40,720 47,280 53,890 60,550 0.13 1200 37,800 45,010 52,290 59,640 67,050...

  • Page 16: Hydronic Control Box Power Connection Locations

    SECTION 7: LINE VOLTAGE WIRING Power Supply Wiring The factory air handler internal wiring is complete except for the power supply and the thermostat wires. See Tables 14 and 15 for wire size, fuse/circuit breaker size, and ground wire sizes. The use of cable connectors on incoming power supply wires to relieve any strain on wiring is required.

  • Page 17: Component Locations - Hydronic Heat - No Pump

    AIR HANDLER MODELS MSVE 37,42,48,60 MSVT 37, 42, 48, 60 MSVE 72 Indoor Blower Type Constant Torque Indoor Blower Amps 6.31 7.41 8.48 Minimum Circuit Ampacity 7.89 9.26 10.6 Minimum Wire Size (90°C) Minimum Wire Size (75°C) Minimum Wire Size (60°C) Ground Wire Size Maximum Overcurrent Protection Amps Table 15: Wiring Requirements –...

  • Page 18: Thermostat Wiring And Connections

    the thermostat does not have the “RC” and “RH” terminals, a new SECTION 8: THERMOSTAT WIRING AND CONNECTIONS thermostat with “RC” and “RH” terminals must be purchased and Thermostat Wiring installed. Thermostat wires connect through side of air handler and should IMPORTANT: Cycle the air handler and outdoor unit separately to be no smaller than 22 gauge.

  • Page 19: Hydronic Heat W/1-Stage Cooling Low Voltage Wiring

    AIR HANDLER AIR HANDLER TRANSFORMER TRANSFORMER 24 VAC 24 VAC 24 VAC COMMON 24 VAC COMMON Y/Y1 *MSVE ONLY Y/Y1 *MSVE ONLY COOLING UNIT AIR HANDLER HEAT PUMP UNIT OUTDOOR SECTION OUTDOOR SECTION AIR HANDLER THERMOSTAT THERMOSTAT FREEZE PROTECTION FREEZE PROTECTION Figure 12: Typical Low Voltage Connections - Figure 13: Typical Low Voltage Connections -...
  • Page 20 Typical Heating/Cooling Thermostat Wiring Connections handler LVTB or to the WHITE air handler pigtail. If applicable, 1. Remove blower/control box access panel. also connect the wire from the outdoor control board or pigtail 2. Remove the control box cover. that calls for supplemental heat during the defrost cycle to the 3.

  • Page 21: Blower Performance

    SECTION 9: BLOWER PERFORMANCE Volts 1 CFM @ CFM @ CFM @ CFM @ CFM @ CFM @ Model Motor Motor Blower Speed Ph. 50/60 0.10” 0.20” 0.30” 0.40” 0.50” 0.60” Number Code Wheel MSVT18 MSVT24 0.50 10 X 8 Hydronic 1076 1020...

  • Page 22: Typical Ht Pump T-Stat Wire Colors & Low Voltage Connections . 19 19 - Msvt Blower Performance Chart - Constant Torque Motors . 21 20 - Msve Blower Performance Chart - Ecm Motors

    Motor Volts Motor Blower Jumper CFM @ CFM @ CFM @ CFM @ CFM @ Model Number Nominal 1 Ph. Code Wheel 0.10” 0.20” 0.30” 0.40” 0.50” Tons 50/60 Hz 0.33 10X7 MSVE18,24 Hydronic & Heat 0.50 10 X 7 1294 1255 1200...

  • Page 23: Blower Motor Speed Selection

    SECTION 10: BLOWER MOTOR SPEED SELECTION To avoid personal injury or property damage, make Notice: The factory motor speed tap settings are certain that the motor leads cannot come into contact appropriate for most applications. Refer to the blower with non-insulated metal components of the air handler. performance tables in Section 9 of this manual before changing the motor speeds from the factory settings.

  • Page 24: Filling Heating System With Water And System Startup

    Example of the flash code: The air handler is operating at 1400 CFM. The flash sequence will be 14 one-second flashes, 0.1 seconds apart, followed by a 10 second pause before the flash sequence starts over. Dehumidification Mode The ECM control board has a jumper pin (OP1) to enable or disable the de-humidification mode.

  • Page 25: Wiring Diagrams

    SECTION 12: WIRING DIAGRAMS Figure 17: MSVE 18- 36 / ECM – No Choke – No Pump Figure 18: MSVE 18 - 36 / ECM 2.3 – With Pump – No Choke MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TX 76106 Page 25...

  • Page 26: Wiring Diagram: Msve 37 - 72; Ecm Mtr; W/Choke & Pump

    Figure 19: MSVE 37 -72 / ECM – With Choke and Pump Figure 20: MSVE 37 - 72 / ECM – With Choke - No Pump MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TX 76106 Page 26...

  • Page 27: Wiring Diagram: Msvt 18 - 36 / C.t. Mtr; W/Pump; No Choke

    Figure 21: MSVT 18 – 36 / Constant Torque Motor – With Pump - No Choke Figure 22: MSVT 18 – 36 / Constant Torque Motor – No Pump MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TX 76106 Page 27...

  • Page 28: Wiring Diagram: Msvt 37 - 60; C.t. Motor; W/Choke & Pump

    Figure 23: MSVT 37 - 60 Constant Torque Motor – With Choke and Pump Figure 24: MSVT 37 - 60 Constant Torque Motor – With Choke - No Pump MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TX 76106 Page 28...
  • Page 29 Subject to change without notice 61M1S002D Copyright by Mortex Products Inc. 2023 Supersedes: 61M1S002C MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TX 76106 Page 29...

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