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INSTALLATION INSTRUCTIONS
7EUX
IMPORTANT
Refrigerant Detection System Control (27A05) must
be ordered. For non-communicating furnaces, order kit
27A05.RDS system requires 3 VA additional loading on
low voltage transformer.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, service agency, or the gas supplier.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
Allied Air Enterprises LLC
215 Metropolitan Drive
West Columbia, SC 29170
508480-01
This manual must be left with the homeowner for future reference.
Indoor Vertical Upflow Coil
Table of Contents
Model Number Identification ...........................................3
Applications ..................................................................3
Installation .....................................................................4
Refrigerant Line Connections ........................................7
Leak Testing, Evacuating and Charging ........................9
Condensate Drain Connections ................................... 11
Blower Speed Selection ..............................................12
Maintenance ................................................................13
Decommissioning ........................................................14
To prevent serious injury or death:
1. Lock-out/tag-out before performing maintenance.
2. If system power is required (e.g., smoke detector
maintenance), disable power to blower, remove fan
belt where applicable, and ensure all controllers
and thermostats are set to the "OFF" position before
performing maintenance.
3. Always keep hands, hair, clothing, jewelry, tools, etc.
away from moving parts.
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General Information
The 7EUX coil includes an externally equalized factory-
installed R454B check/expansion valve and a factory-
installed R454B refrigerant leak detection sensor.
The coil drain pan has a maximum service temperature
of 500°F. The drain pan must be at least 2" away from a
standard gas-fired furnace heat exchanger and at least 4"
away from any drum-type or oil-fired furnace heat exchanger.
Closer spacing may damage the drain pan and cause a leak.
Refer to the Product Specification for the proper use of
these coils with specific furnaces, air handlers and line
sets.
These instructions are intended as a general guide and do
not supersede local or national codes in any way. Authorities
who have jurisdiction should be consulted before installation.
IMPORTANT: Special procedures are required for
cleaning the aluminum coil in this unit. See page 13 in this
instruction for information.
*508480-01*
Issue 2429
- R454B
WARNING
(P) 508480-01
Page 1 of 15
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Summary of Contents for Lennox Allied Air Enterprises 7EUX
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS Indoor Vertical Upflow Coil 7EUX – R454B This manual must be left with the homeowner for future reference. Table of Contents Model Number Identification ...........3 7EUX Optional Adjustable Coil Adapter/Seal Applications ..............3 Installation ..............4 Refrigerant Line Connections ........7 Leak Testing, Evacuating and Charging ......9 Condensate Drain Connections ........ -
Page 2: Shipping And Packing List
WARNING Shipping and Packing List Package 1 of 1 contains: Auxiliary devices which may be a potential ignition source shall not be installed in the duct work. Examples 1 – Evaporator coil of such potential ignition sources are hot surfaces with 1 –... -
Page 3: Model Number Identification
NOTE – R454B is an A2L refrigerant. The system installation must meet the following parameters based upon total refrigerant charge (line set included). TAmin (Total minimum conditioned area) is the minimum allowable conditioned area based upon the total system charge at sea level. -
Page 4: Installation
ADJUSTABLE COIL ADAPTER/SEAL DIMENSIONS — inches (mm) 14 1/2 (368) to 24 7/8 (632) 19 3/4 (502) (25) (25) 9 (228) to 19 3/8 (492) 17 3/4 (451) 2 3/4 2 3/4 Opening Opening (70) (70) (19) FRONT VIEW SIDE VIEW ADJUSTABLE COIL ADAPTER/SEAL DETAIL Frame Telescopes To Accommodate Various... - Page 5 • If any hot work is to be conducted on the refrigerating ner to avoid possibility of sparking, that no live electri- equipment or any associated parts, the appropriate fire cal components and wiring are exposed while charging, extinguishing equipment shall be available to hand. recovering, or purging the system, and that there is Have a dry powder or CO2 fire extinguisher adjacent to continuity of earth bonding.
- Page 6 This process might need to be repeated several times. NOTE - The coil cabinet has six screw clearance holes Compressed air or oxygen shall not be used for purging which should be aligned with the furnace engagement holes. Secure the coil cabinet to the furnace or air handler refrigerant systems.
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Page 7: Refrigerant Line Connections
FIGURE 1 Refrigerant Line Connections TABLE 1. Refrigerant Line Connections – Model 7EUX LINE SIZES Model Number Suction Liquid The refrigerant line sets should be sized according to the recommendations given in the air conditioner unit instal- lation instructions. Use table 1 to determine correct braze connection sizes. -
Page 8: Replacement Parts
REPLACEMENT PARTS If replacement parts are necessary, order kit 69J46. The kit includes: • 10 – Brass nuts for liquid line assemblies • 20 – Teflon rings • 10 – Liquid line orifice housings • 10 – Liquid line assemblies PISTON FIGURE 4. -
Page 9: Leak Testing, Evacuating And Charging
2 - For brazed connections: • Steps to ensure this are: becoming familiar with the equipment and its operation, isolating the system elec- Position the refrigerant piping and make the brazed connection following the brazing trically, ensuring that before attempting the procedure guidelines. - Page 10 If compressors or compressor oils are to be removed, Suction Line ensure that they have been evacuated to an acceptable 1 - Using the insulation provided, wrap the section of level to make certain that flammable refrigerant does not the suction line next to the coil cabinet. Start at remain within the lubricant.
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Page 11: Condensate Drain Connections
The coil cabinet and drain openings MUST be sealed after installation to ensure against air leaks, which can impact system performance. The material, and method, used should be capable of enduring the range of temperature and humidity levels expected in the specific install loca- tion. -
Page 12: Blower Speed Selection
OVERFLOW DRAIN LINE ABOVE ALWAYS RUN AN OVERFLOW DRAIN LINE. IF NOT POSSIBLE TO FINISHED ROUTE OVERFLOW DRAIN LINE, INSTALL LOW VOLTAGE SPACE? VENT MUST EXTEND OVERFLOW SWITCH KIT. WIRE SHUT DOWN ABOVE HEIGHT OF COMPRESSOR PER INSTRUCTIONS. COIL DRAIN PAN BY TWO INCHES VENT CLEAN OUT... -
Page 13: Maintenance
6 - When the required static pressure readings are take the coil to an appropriate place to clean it. obtained, remove the test hose lines and insert Refrigerant leak detection sensor and line set joint snap hole plugs into test holes. sleeves must be removed as well. -
Page 14: Decommissioning
Use of Coil-Furnace System During Construction NOTWITHSTANDING THE FOREGOING, INSTALLER IS RESPONSIBLE FOR CONFIRMING THAT THE USE Units may be used for heating or cooling of buildings or OF CONSTRUCTION HEAT IS CONSISTENT WITH THE structures under construction, if the following conditions POLICIES AND CODES OF ALL REGULATING ENTI- are met to ensure proper operation: TIES. - Page 15 Sensor Maintenance It is recommended to check the state of the sensor every six months, at the beginning of each cooling and heating season. • Ensure that the sensor openining is clear and free of debris. • Check that the sensor cable is in good condition. •...
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