Suntherm MS Series Installation Manual
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Suntherm MS Series Installation Manual

Multi-position, upflow, and horizontal dx and chilled water cooling with electric heating
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Multi-position, Upflow, and Horizontal DX and Chilled Water Cooling with Electric Heating
MODELS: MS, MM, US, UM SERIES
1 - General
4 - Furnace and Supply Air Duct Installation
6 - Hydronic Heating / Cooling / Refrigerant Piping
1 - Dimensional Data DX Cool With or Without Electric Heat
2 - Dimensional Data Chilled Water With or Without Electric Heat 5
8 - Evaporator Coil Assembly to Convert to Downflow
9 - Combustible Floor Base - Downflow Operation
10 - Installing Evaporator Below Condenser - Piping
17 - Control Box Circuit Breaker Locations
18 - Circuit Breaker Location on Front Panel
20 - 1 Stage Heat w/ 1 Stage Split System Cooling Wiring Diagram 18
21 - 1 Stage Heat w/ 1 Stage Package Cooling Wiring Diagram
22 - 1 Stage Heat w/ 1 Stage Split System HP Wiring Diagram
23 - 1 Stage Heat w/ 1 Stage Package HP Wiring Diagram
3 - Dimensional Data Chilled Water With or Without Electric Heat 5
6 - Wiring Requirements - 18-36 kBTU - Single Branch Circuit
7 - Wiring Requirements - 37-60 kBTU - Single Branch Circuit
8 - Wiring Requirements - 25-60 kBTU - Duel Branch Circuit
9 - Wiring Requirements - 37-72 kBTU - Duel Branch Circuit
SECTION I: GENERAL
The following list includes important facts and information
regarding the electric furnace and its inclusions.
1. Air handler is rated at either 120 volts AC or 240 volts
AC at 60 Hertz
2. Air handler size varies by model
3. Four-wire thermostat operation for heating and cooling
4. Seven wire thermostat for heat pump operation.
5. Air Handlers equipped with blower for A/C or Heat Pump
operation
MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106 
INSTALLATION MANUAL
LIST OF SECTIONS
LIST OF FIGURES
LIST OF TABLES
1
2
6
8
10
10
4
24 - 2 Stage Heat w/ 2 Stage Split System Cooling Wiring Diagram 19
25 - 1 Stage Heat w/ 2 Stage Package Cooling Wiring Diagram
7
26 - 2 Stage Heat w/ 2 Stage Split System HP Wiring Diagram
7
27 - 2 Stage Heat w/ 2 Stage Package HP Wiring Diagram
8
8
29 - Blower Assembly and Blower Deck Drawing
9
30 - ECM Motor Control Plug Pin out
9
10
32 - MSVE 18-72 - ECM - No Electric Heater Wiring Diagram
10
33 - MSVE 18-72 - ECM - 5 kW Electric Heater Wiring Diagram 25
11
34 - MSVE 25-72 - ECM - 10 kW Electric Heater Wiring Diagram 25
12
35 - MSVE 37-72 - ECM - 15 kW Electric Heater Wiring Diagram 26
12
36 - MSVE 42-72 - ECM - 20 kW Electric Heater Wiring Diagram 26
13
37 - MSVT 18-72 - X-13 - No Electric Heater Wiring Diagram
15
38 - MSVT 18-72 - X-13 - 5 kW Electric Heater Wiring Diagram
15
39 - MSVT 18-72 - X-13 - 10 kW Electric Heater Wiring Diagram 28
16
40 - MSVT 36-72 - X-13 - 15 kW Electric Heater Wiring Diagram 28
16
41 - MSVT 37-72 - X-13 - 20 kW Electric Heater Wiring Diagram 29
17
42 - MSPS 18-60 - PSC - No Electric Heater Wiring Diagram
43 - MSPS 18-60 - PSC - 5 kW Electric Heater Wiring Diagram
18
44 - MSPS 18-60 - PSC - 10 kW Electric Heater Wiring Diagram
19
45 - MSPS 30-60 - PSC - 15 kW Electric Heater Wiring Diagram
19
46 - MSPS 37-60 - PSC - 20 kW Electric Heater Wiring Diagram
3
10 - Electrical Data
4
11 - Field Installed Electric Heater Kit Model Numbers
12 - Field Installed Accessory Heater Kit Nomenclature
6
13 - Low Voltage Wire gauge and Maximum Lengths
7
14 - Recommended Heating / Cooling Thermostat Wire Colors
14
15 - Recommended Heating / Cooling / HP Thermostat Wire Colors 20
14
14
15
6. This air handler is designed for multi position, upflow and
horizontal application
7. This air handler must not be operated without the door
installed
NOTE: This air handler 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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Summary of Contents for Suntherm MS Series

  • Page 1: Table Of Contents

        INSTALLATION MANUAL Multi-position, Upflow, and Horizontal DX and Chilled Water Cooling with Electric Heating MODELS: MS, MM, US, UM SERIES LIST OF SECTIONS 1 – General 7 – Line Voltage Wiring 2 – Safety 8 – Field Installed Electric Heater Kits 3 –...

  • Page 2: Safety

    It is also recommendation made in these instructions. used to alert against unsafe practices and hazards involving SunTherm assumes no responsibility for units installed in property damage. violation of any code or regulation.

  • Page 3: Air Handler Model Specifications

    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 air handler, death, ALWAYS SHUT OFF ELECTRICITY AT THE personal injury, and/or property damage.

  • Page 4: Dimensional Data Dx Cooling With Or Without Electric Heat

      Figure 1: DIMENSIONAL DATA DX COOLING WITH OR WITHOUT ELECTRIC HEAT  DIMENSIONAL DATA MULTI‐POSITION AIR HANDLER COOL ONLY OR ELECTRIC 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, 38, 46 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...
  • Page 5 S  Figure 2: DIMENSIONAL DATA CHILLED WATER WITH AND WITHOUT ELECTRIC HEAT  Model MS**18,24 17.50 43.00 21.00 15.50 12.50 13.50 11.00 6.75 16.75 16.25 13.50 10.75 8.25 4.75 2.00 4.00 8.75 2.00 16.10 20.20 MS**25, 30, 36 21.00 48.00 21.00 19.00 12.50 15.50 13.00 6.75 20.25 19.75 14.25 12.75 10.25 7.50 2.25 4.25 10.50 2.50 19.90 20.80 MS**37, 42, 48, 60, 72 24.50 58.75 21.75 19.50 16.25 19.75 17.25 6.75 28.25 27.75 19.75 16.00 13.50 10.25 2.25 4.25 12.50 2.25 23.50 20.70 Table 3: DIMENSIONAL DATA CHILLED WATER WITH AND WITHOUT ELECTRIC HEAT MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106 ...

  • Page 6: Clearance And Return Air Requirements

    Unit Size Evaporator Heating Series Motor Type Capacity in Voltage Coil Option Code Configuration MBTU/H Configuration MS = Multi-position Single Piece AA = Standard Configuration MM = Multi-position Modular XX = Motor Program Code US = Upflow Single Piece XX = Pre-Painted Grey Top &...

  • Page 7: Clearance - Access For Service

    such as an attic or garage. Installer must provide protection such as full size auxiliary drain pan on all units installed in a non-conditioned space to prevent damage from condensation runoff. Some states, cities and counties require additional insulation to be installed on the exterior casing of the air handler to prevent sweating.

  • Page 8: Typical Closet Installations

    2400 CFM = 25 x 30 x 1 or two 14 x 30 x 1 Pleated filters are not recommended for use with PSC Motors. Another option is to use the SunTherm Filter Base Accessory Kit. This filter base is placed on the closet floor and secured with screws.

  • Page 9: Evaporator Coil Disassembly For Conversion To Downflow

    the attic to a register in each room. Use a Non-tape sealant such as mastic or an aerosol sealant to prevent leaks in the ducts and the plenum. The opposite end of the return air duct is attached to a return filter grille housing.

  • Page 10: Furnace Installation

    Before installing the combustible floor base make sure that there SECTION VI: COOLING AND REFRIGERANT is a minimum of R-2.1 insulation between the sheet metal and PIPING any wood or combustible flooring. Refer to Figure 9 for typical DX Refrigerant Piping: combustible floor base installation.
  • Page 11 diaphragm. It’s purpose is to regulate the rate at which predetermined superheat within the evaporator. This is how the refrigerant flows into the evaporator. TXV keeps the system in balance and operating properly. To understand how this works, we must have a clear understanding of superheat.

  • Page 12: Txv Trouble Shooting Guide

    Check the evaporator coil and remove the TXV's sensing bulb b. Warm location from the suction line. 5. Bad compressor – low capacity Incorrectly located external equalizer line – needs to be Check the subcooling, superheat and pressures again. If there's located on suction line after the last feeder tube.

  • Page 13: Typical Txv Connections

    SPECIAL INSTRUCTIONS FOR COILS WITH FLOWRATOR DISTRIBUTOR ASSEMBLIES The sizing of the orifice piston should be based strictly on the Coil is pressurized with nitrogen. Relieve pressure before rated capacity of the outdoor unit and coil match. installing TXV by depressing Schrader valve on coil manifold.

  • Page 14: Typical Condensate Trap

    The unit internal wiring is complete except for the power supply and the thermostat wires. See wiring diagram and/or Tables 6-9 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 recommended.
  • Page 15 IMPORTANT - Refer to the NEC National Electrical Code The 15kW and 20kW models may be connected to a single or (NFPA 70) or the Canadian Electrical Code, Part I (CSA C22.1) dual branch circuit. and local codes for wiring material requirements. AIR HANDLER MODELS **VE18, 24 **VT 18, 24...

  • Page 16: Component Locations - Electric Heat Control Box

    Table 8: Wiring Requirements – 208/230 VAC Electric Heat 25-60 kBTU Models – Dual Branch Circuit 15kW, and 20kW Two Stage models may have a dual or single power supply. - Single power supply may require jumper bar or a jumper wire. + Refer to the National Electrical Code Table 250-95 for Non-Sheathed Conductor Ground Wire.

  • Page 17: Component Locations - No Heat Control Box

    Figure 16: Component Locations – No Heat Control Box For personal safety be sure to turn the electrical power “OFF” at the main entrance (Home Circuit Breaker Box) and at the unit control box circuit breakers before attempting any service or maintenance operations. Homeowners should never attempt to perform any maintenance which requires opening the air handler control box door.

  • Page 18: Thermostat Wiring And Connections

    Large cabinet **VE37, 42, 48, 60, 72 - **VT37, 42, 48, 60, 72 - **PS37, 42, 48, 60, 72. The field installed electric heat accessories are used on cooling or heat pump models that were not purchased with electric heat from the factory.

  • Page 19: No Heat And Factory Installed Electric Heat Control Box

    24 Volt Systems. Cycle furnace and the air conditioner separately to make sure it will operate correctly. Most new thermostats have separate heating and cooling contacts for use with homes that have a air handler and air conditioner that are completely separate and each have a 24 VAC transformer for system control.
  • Page 20 Air Handler Air Handler Transformer W /E Transformer 24 VAC 24 VAC W /E 24 V AC Common 24 VAC Common Heat Pump Unit Outdoor Section Thermostat Cooling Unit Outdoor Section AH ECM BOARD Figure 22: Typical Single Stage Heat with Single Stage Thermostat Split System Heat Pump AH ECM...
  • Page 21 Air Handler Air Handler Transformer Transformer 24 VAC 24 VAC 24 VAC 24 VAC Common Common Heat Pump Unit Cooling Unit Outdoor Section Outdoor Section Thermostat Thermostat AH ECM BOARD AH ECM BOARD Figure 26: Typical Two Stage Heating with Two Stage Figure 24: Typical Two Stage Heat with Two Stage Split System Heat Pump Split System Cooling...
  • Page 22 Letter  Furnace Pig Tail  Thermostat  Condenser  Wire Color Description Code Wire Connection Connection Connections 24 VAC WHITE Heat (1st Stage Heat) White GREEN Indoor Fan Green YELLOW Cooling ‐ Stage 1 Yellow Y or Y1 Y or Y1 GREY 24 VAC Common Grey BROWN Heat (Optional 2nd Stage Heat) Brown ORANGE Heat Pump Reversing Valve Solenoid BLUE Cooling ‐ (Optional 2nd Stage Cooling) Table 15: Recommended Heating / Cooling / Heat Pump Thermostat Wire Color Codes and Connections. 5.

  • Page 23: Motor, Blower And Furnace Startup

    SECTION X: MOTOR, BLOWER AND Replacing the X-13, ECM, 3/4 HP PSC and 1 HP PSC Blower Motor FURNACE STARTUP SECTION 1. Turn off all electrical supply circuits to the air handler at the main service panel. 2. Remove air handler blower door and switch the air handler circuit breaker(s) to “OFF”...

  • Page 24: Ecm Motor Control Connector Terminal Descriptions

    The PROFILES jumper pins are used for blower motor on and off delays. See Climate Profiles in the back of the SERVICE AND MAINTENANCE MANUAL of these instructions to determine the proper setting for the climate in your area. 4. Turn the circuit breakers on and reinstall air handler blower door.

  • Page 25: Final System Checkout

    14 Set the thermostat to the desired temperature. If the ECM motor dehumidify program is no longer desired by the home owner, simply move the jumper pin back to the OFF SECTION XI: FINAL SYSTEM position to disable the motor program. CHECKOUT Control Board Flash Code 1.
  • Page 26 Figure 32: MSVE 18-72 - ECM 2.3 – No Electric Heater Figure 33: MSVE 18-72 – ECM 2.3 – 5 kW Electric Heater. MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106  Page 26 ...
  • Page 27 Figure 34: MSVE 25-72 – ECM 2.3 – 10 kW Electric Heater Figure 35 MSVE 37-72 – ECM 2.3 – 15 kW Electric Heater MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106  Page 27 ...
  • Page 28 Figure 36 MSVE 42-72 – ECM 2.3 – 20 kW Electric Heater Figure 37 MSVT 18-72 – X-13 – No Electric Heater MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106  Page 28 ...
  • Page 29 Figure 38 MSVT 18-72 – X-13 – 5kW Electric Heater Figure 39 MSVT 18-72 – X-13 – 10kW Electric Heater MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106  Page 29 ...
  • Page 30 Figure 40 MSVT 36-72 – X-13 – 15kW Electric Heater Figure 41 MSVT 37-72 – X-13 – 20kW Electric Heater MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106  Page 30 ...
  • Page 31 Figure 42 MSPS 18-60 – PSC – No Electric Heater Figure 43 MSPS 18-60 – PSC – 5kW Electric Heater MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106  Page 31 ...
  • Page 32 Figure 44 MSPS 18-60 – PSC – 10kW Electric Heater Figure 45 MSPS 30-60 – PSC – 15kW Electric Heater MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106  Page 32 ...
  • Page 33 Figure 46 MSPS 37-60 – PSC – 20kW Electric Heater Subject to change without notice 61BA0013 Copyright by Mortex Products Inc. 2011. Supersedes: ® MORTEX PRODUCTS INC. 501 TERMINAL RD FORT WORTH, TEXAS 76106  Page 33 ...

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