Table of Contents
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ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
Important: This Document is customer property and is to remain with this unit. Please return to service information
pack upon completion of work.
Important: These instructions do not cover all variations
in systems nor provide for every possible contingency to
be met in connection with the installation. Should further
information be desired or should particular problems
arise which are not covered sufficiently for the pur-
chaser's purposes, the matter should be referred to your
installing dealer or local distributor.
Note: The manufacturer recommends installing ONLY
A.H.R.I. approved, matched indoor and outdoor systems.
Some of the benefits of installing approved matched
indoor and outdoor split systems are maximum efficien-
cy, optimum performance, and the best overall system
reliability.
Note: Condensation may occur on the surface of the air
handler when installed in an unconditioned space. When
units are installed in unconditioned spaces, verify that
all electrical and refrigerant line penetrations on the air
handler are sealed completely.
The *AM7 air handlers will only use the
following internal electric heaters:
BAYEVAC05BK1AA
BAYEVAC05LG1AA
BAYEVAC08BK1AA
BAYEVAC08LG1AA
BAYEVAC10BK1AA
BAYEVAC10LG1AA
BAYEVBC15BK1AA
BAYEVBC20BK1AA
BAYEVCC25BK1AA
BAYEVAC10LG3AA
BAYEVBC15LG3AA
Note: Duct heaters cannot be applied
with this air handler.
Installer's Guide
Convertible Air Handlers
2 – 5 Ton
*AM7A0A24H21SA
*AM7A0B30H21SA
*AM7A0C36H31SA
*AM7A0C42H31SA
18-GJ06D1-3
*AM7A0C48H41SA
*AM7A0C60H51SA
* May be "A" or "T"
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Table of Contents
Related Manuals for Trane AM7A0A24H21SA Series
Summary of Contents for Trane AM7A0A24H21SA Series
- Page 1 18-GJ06D1-3 Installer’s Guide Convertible Air Handlers 2 – 5 Ton *AM7A0A24H21SA *AM7A0C48H41SA *AM7A0B30H21SA *AM7A0C60H51SA *AM7A0C36H31SA *AM7A0C42H31SA * May be “A” or “T” ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES Important: This Document is customer property and is to remain with this unit. Please return to service information pack upon completion of work.
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Page 2: Table Of Contents
Table of Contents Section 1. Safety Information ................2 Section 2. Unit Design ..................3 Section 3. Unit Preparation ................5 Section 4. Optional Cabinet Disassembly ..........6 Section 5. Place Unit at Location ..............11 Section 6. -
Page 3: Section 2. Unit Design
Section 2. Unit Design 2.1 Cabinet Penetration Important: Due to the unique design of this unit, which allows the electrical wiring to be routed within the insulation, do not screw, cut, or otherwise punc- ture the unit cabinet in any location other than the ones illustrated. - Page 4 The Coil, Line Set, and Heater panels are removed using Phillips head screws. #3 Size Phillips Coil and Heater panels must be removed prior to re- moving the Line Set panel. To remove Coil Panel: 1. Turn screws on Coil panel. 2.
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Page 5: Section 3. Unit Preparation
Section 3. Unit Preparation 3.1 Prepare The Unit For Installation STEP 1 - Check for damage and report promptly to the carrier any damage found to the unit. Note: The unit is shipped “upside-down” in the downflow orientation and may be easiest to trans- port to the job site in that orientation. -
Page 6: Section 4. Optional Cabinet Disassembly
Section 4. Optional Cabinet Disassembly 4.1 Disassemble cabinet for installation in tight areas or as needed. Note: The unit is shipped “upside-down” in the downflow orientation and may be easiest to transport to the job site in that orientation. If the unit must be transported in a horizontal position, it must be laid on its back (marked “REAR”... - Page 7 STEP 2 - Disconnect the two wiring connections routed to the blower assembly. STEP 3 - Slide Blower assembly out of unit using built-in blower support channels and set aside. Wiring Connections Blower Support Channel STEP 4 - Remove airflow diverter from the bottom of coil drain pan by gripping the plastic diverter, using Diverter your thumbs to spread the top of the diverter slightly...
- Page 8 STEP 5 - Disconnect wires to the EEV motor and sensors inside the coil assembly. Cut the wire ties on those wire harnesses. STEP 6 - Slide Coil assembly out of unit using built- in coil support channels and set aside. Coil Support Channel STEP 7 - Use a 5/16 Allen wrench on the locking...
- Page 9 STEP 8 - Lift the Coil section up and away from the Blower section. Set aside.
- Page 10 STEP 9 - For extremely tight spaces where the cabinet needs to be rotated through a small opening, remove the top panel and all cross members. Use a manual driver to avoid stripping screw holes. Note: Cross Members are removed by rotating them toward the door opening and then lifting up and out of the unit.
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Page 11: Section 5. Place Unit At Location
Section 5. Place Unit at Location 5.1 Carry Unit STEP 1 - Carry the unit to the installation location. STEP 2 - Reassemble by reversing the steps listed in Section 4 if disassembly was required. If cut, wire ties that held the sensor wiring must be replaced. Important: Under no conditions should metal strap- ping be attached to the unit to be used as support mechanisms for carrying or suspension purposes. -
Page 12: Section 6. Unit Location Considerations
2. Slip a flexible strap through both of the side Flexible strap electrical conduit entry points and use the flex- ible strap to lift and carry the coil section of the unit. Section 6. Unit Location Considerations 6.1 Unit Dimensions and Weight Table 7.1 Model H x W x D... -
Page 13: Downflow Configuration
6.2 Four-Way Conversion To place the unit in the configuration your application requires (upflow, downflow, horizontal right, or horizontal left), simply turn the unit to that orientation. Note: The air handlers are shipped from the factory suitable for four-way application. They are shipped in the down- flow orientation. - Page 14 Airflow Control Horizontal Left Refrigerant Low Voltage Pocket Condensate Connections Connections Inside unit Drains inside unit Horizontal Left Configuration Control Low Voltage Pocket Connections Refrigerant Inside unit inside unit Connections Airflow Horizontal Right Condensate Drains Horizontal Right Configuration...
- Page 15 6.3 Non Ducted Applications CAUTION Supply Duct HAZARDOUS VAPORS! Do not install an air handler with a non-ducted return in the same closet, alcove, or utility room as a fossil fuel device. Hazardous vapors can be distributed throughout the conditioned space and equipment damage can result.
- Page 16 6.5 Additional Unit Preparation Considerations • These units are not approved for outdoor installation. For proper installation the following items must be con- sidered prior to moving the unit to its installation site: • These units must be installed in the proper air flow •...
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Page 17: Section 7. Setting The Unit - Vertical Installation
Section 7. Setting the Unit - Vertical Installation 7.1 Secure Coil STEP 1 - Remove Coil Panel. STEP 2 - Remove screw from documentation packet. STEP 3 - While the air handler is in the upflow position, use the supplied screw to secure the coil seal plate to cross member as shown. -
Page 18: Plenum Installation
Plenum Installation 1. Assemble the plenum using the plenum’s Installer Guide. On units with sheet metal returns: Return plenum must be flanged. Sheet metal drill point screws must be 1/2” in length or shorter. Airflow Typical Plenum Installation 7.4 Downflow Installation •... -
Page 19: Section 8. Setting The Unit - Horizontal Installations
Section 8. Setting the Unit - Horizontal Installations 8.1 Secure Coil STEP 1 - Remove Coil Panel. STEP 2 - Remove screw from documentation packet. STEP 3 - While the air handler is in the upflow posi- tion, use the supplied screw to secure the coil seal plate to cross member as shown. -
Page 20: Section 9. Connecting The Duct Work
Section 9. Connecting the Duct work 9.1 Duct Connection Considerations Important: Due to the unique design of this unit, which allows the electrical wiring to be routed within the insulation, do not screw, cut, or otherwise punc- ture the unit cabinet in any location other than the ones illustrated in this Installer Guide or in an ap- proved accessory’s Installer Guide. -
Page 21: Section 10. Refrigerant Line
Section 10. Refrigerant Line 10.1 Refrigerant Line Connection Sizes Table 8.1 Refrigerant Line Connection Sizes Vapor Line Liquid Line Model Connection Connection *AM7A0A24H21SA *AM7A0B30H21SA *AM7A0C36H31SA *AM7A0C42H31SA *AM7A0C48H41SA *AM7A0C60H51SA * May be “A” or “T” Note: All AHRI listed systems which are inclusive of the above fan coil units were tested with 25 feet of tubing. -
Page 22: Section 11. Refrigerant Line Brazing
Section 11. Refrigerant Line Brazing 11.1 Braze The Refrigerant Lines STEP 1 - Remove Heater, Coil, and Line Set panels. Heater (See Section 2.2 Panel Removal) Panel Line Set Panel Coil Panel Important: Do NOT unseal coil refrigerant connec- tion stubs until ready to make connections. STEP 2 - Remove the plastic cap and Schrader valve core from the gas line. - Page 23 STEP 7 - Braze refrigerant line connections. Wet Rag on Gas Temperature Note: The suction line must be insulated prior to Sensor (GT) brazing the line set to the air handler stubs. 1. Pull back the insulation before brazing the suc- tion line.
- Page 24 Important: Do not open the service valves until the refrigerant lines and indoor coil leak check and evacu- ation are complete. 0350 Microns STEP 10 - Evacuate until the micron gauge reads no higher than 350 microns, then close off the valve to the vacuum pump.
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Page 25: Section 12. Condensate Drain Piping
Section 12. Condensate Drain Piping 12.1 Condensate Drain Piping Considerations • Do not connect the drain line to a closed drain • Condensate drain plumbing must comply with na- tional, state, and local codes. system. • Route condensate drain lines away from air handler •... - Page 26 STEP 4 - Install a clean-out tee in the primary drain line for future maintenance. It is recom- mended that you install a cap on the top of the tee. 3” min. 3” minimum clearance is recommended from cabinet to inside edge of tubing STEP 5 - Insulate the primary drain line to...
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Page 27: Section 13. Electrical - Low Voltage
Section 13. Electrical - Low Voltage 13.1 Low Voltage Maximum Wire Length Table 11.1 defines the maximum total length of low Table 11.1 voltage wiring from the outdoor unit, to the indoor 24 VOLTS unit, and to the thermostat. WIRE SIZE MAX. - Page 28 STEP 3 - Remove the control board from the control pocket by sliding the control pocket mounting plate out until the first stop is reached. Control Pocket Inside unit Control Board For Horizontal Right installations Only Remove the control board completely from the control pocket.
- Page 29 Air Conditioner STEP 4 - Make connections per hookup diagrams. Single Stage Cooling Neatly bundle all low voltage wires behind the service valve cover as shown. Air Handler Comfort Control W3 * Blue White Yellow Green Yellow (In) Blue B - Blue (Out) Y1 - Yellow Field wiring...
- Page 30 Air Conditioner Two Stage Cooling Neatly bundle all low voltage wires behind the service valve cover as shown. Air Handler Comfort Control Yellow/Black W3 * Yellow/Red White Green Blue Yellow Y2 - Brown (In) Blue Brown B - Blue (Out) Y1 - Yellow Field wiring •...
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Page 31: Distribution Board
STEP 5 - Secure the sheathed wiring to the TRANE U.S. INC. control pocket mounting plate using the factory supplied wire ties attached to the tabs to as shown. S1 Dip Switch S2 Dip Switch BAR CODE Airflow Control (AFC) OUTDOOR TRANE U.S. - Page 32 Dip Switch S1 • Set the S1-1 and S1-2 dip switches for the OD multiplier (tonnage) per the chart. OUTDOOR OUTDOOR NOTE: All dip switches are factory set to “OFF”. Capacity (Tons) INDOOR MODEL S1‐1 S1‐2 OD MULTIPLIER AC (System) 2 (Stages) 2 (Compressor) *AM7A0A24H21SA INDOOR...
- Page 33 OUTDOOR OUTDOOR Capacity (Tons) AC (System) 2 (Stages) 2 (Compressor) INDOOR R NET 1 R NET 2 CFM/Ton Cool Off Delay Torque +12V Airflow Control (AFC) Dip Switch S2 COOLING HEATING • Set the S2-1 and S2-2 dip switches for the CFM/TON CFM/TON INDOOR MODEL...
- Page 34 • Set the S2-3 and S2-4 dip switches for the OUTDOOR OUTDOOR Blower Off Delay. Capacity (Tons) AC (System) 2 (Stages) BLOWER OFF DELAY S2‐3 S2‐4 2 (Compressor) 1.5m @ 100% INDOOR NO DELAY R NET 1 R NET 2 3m @ 50% ON CFM/Ton ENHANCED ON Cool Off Delay Torque Indoor Blower Timing...
- Page 35 BK Jumper Indoor Blower Options TRANE U.S. INC. PART NO. LABEL • Humidity Control for Cooling - This unit is capable Jumper of providing additional de-humidification during the (Do Not cooling mode by reducing the airflow when humidity BAR CODE cut) is above the set point.
- Page 36 STEP 7 - Slide control plate assembly into the control pocket until fully seated. The control plate should be flush with the outer edge of the unit. STEP 8 - Replace Coil panel making sure that the wires are located within the wire pass-through pro- vided in the panel.
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Page 37: Section 14. Electrical - High Voltage
Section 14. Electrical - High Voltage 14.1 High Voltage Power Supply The high voltage power supply must match the WARNING equipment nameplate. LIVE ELECTRICAL COMPONENTS! Power wiring, including ground wiring, must comply During installation, testing, servicing, and troubleshooting of this with national, state, and local codes. -
Page 38: Section 15. Filters
STEP 4 - Connect L1, L2, and ground wiring to BLACK pigtail harness in Heater Compartment using GREEN - GROUND wire nuts. The incoming ground wiring will mate up with the green wire shown in the illustration. WIRES CIRCLE BACK AND GO THROUGH STRAIN RELIEF CLAMP... -
Page 39: Section 16. Unit Outline Drawing
Section 16. Unit Outline Drawing MODEL NO. FLOW GAS LINE LIQ LINE CONTROL BRAZE BRAZE *AM7A0A24H21SA 49.9 17.5 14.5 39.6 14.5 24.4 *AM7A0B30H21SA 55.7 21.3 18.4 45.5 18.4 24.8 *AM7A0C36H31SA 56.9 23.5 20.5 46.7 20.5 10.3 24.2 *AM7A0C42H31SA 56.9 23.5 20.5 46.7 20.5... -
Page 40: Section 17. Start Up
Section 17. Start Up 17.1 System Charge Adjustments The following combinations should be charged to 8 degrees sub-cooling to maintain ratings. Indoor Unit Model No. Outdoor Unit Model No. *AM7A0A24H21SA 4A6B4024E1 4A6H5024E1 *AM7A0B30H21SA 4A6B4030E1 4A6H5030E1 *AM7A0B36H31SA 4A6B4036E1 4A6H5036E1 *AM7A0C42H31SA 4A6B4042E1 4A6H5042E1 *AM7A0C48H41SA 4A6B4048E1... - Page 41 17.2 System Start Up STEP 1 - Make sure all panels are securely in place and that all wiring has been properly dressed and secured. STEP 2 - Set the system thermostat to OFF. DONE CANCEL STEP 3 - Turn on electrical power disconnect(s) to apply power to the indoor and outdoor units.
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Page 42: Section 18. Sequence Of Operation
Section 18. Sequence of Operation 18.1 Sequence of Operation R-G contacts close on comfort control sending 24VAC to AM7 Sequence of Operation the G terminal of the AFC. Abbreviations 4. The AFC micro-processor sends a command to the serial • AFC = Airflow Control communicating blower motor to run at 1st stage heating cfm. -
Page 43: Electric Heat
5. The EVC will receive input from the two temperature 5. The AFC micro-processor sends a command to the serial sensors and start to control 1st stage superheat. communicating blower motor to run and close the blower interlock relay on the EHC. The blower motor will now run R-Y2 contacts close on the comfort control sending at the W1 electric heat cfm. -
Page 44: Section 19. Checkout Procedures
Unit Test Button Unit Test Mode will exit if any demand is given to the unit. To enter Unit Test Mode: TRANE U.S. INC. PART NO. LABEL 1. Set System Switch on comfort control to Off 2. Cycle power to the unit, wait 5 seconds...
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