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508133-01

Page 1 of 25

Issue 2140

INSTALLATION INSTRUCTIONS

4HP18V Units

(R410A Refrigerant)

Manufactured By

Allied Air Enterprises LLC

A Lennox International, Inc. Company

215 Metropolitan Drive

West Columbia, SC 29170

 

(P) 508133-01

*P508133-01*

Table of Contents

Application ...................................................................1

General ........................................................................2

Installation ...................................................................2

Refrigerant Piping ........................................................4

Electrical - Circuit Sizing and Wire Routing ...............13

Thermostat Control and Low Voltage Control Wiring 13

Outdoor Unitary Control.............................................17

Unit Operation ...........................................................19

Start-Up .....................................................................20

Maintenance ..............................................................22

Homeowner Information ............................................22

Start-Up and Performance Checklist .........................25

This manual must be left with the homeowner for future reference.

This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to 

the potential for personal injury or death.

Installation and servicing of air conditioning equipment 

can be hazardous due to internal refrigerant pressure 

and live electrical components. Only trained and 

qualified  service  personnel  should  install  or  service 

this equipment. Installation and service performed by 

unqualified  persons  can  result  in  property  damage, 

personal injury, or death.

 WARNING

Sharp metal edges can cause injury. When installing 

the unit, use care to avoid sharp edges.

 WARNING

ELECTRICAL SHOCK HAZARD!

Risk of electrical shock. Disconnect all 

remote power supplies before installing 

or servicing any portion of the system. 

Failure to disconnect power supplies 

can result in property damage, personal 

injury, or death.

 WARNING

Application

These units are designed for use in residential and light 

commercial type buildings. Units should be installed with 

approved indoor matches listed in the Air-Conditioning, 

Heating and Refrigeration Institute (AHRI) Directory of 

Certified Products. Refer to http://www.ahridirectory.org.

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.

 IMPORTANT

Summary of Contents for 4HP18V

Page 1: ...trical components Only trained and qualified service personnel should install or service this equipment Installation and service performed by unqualified persons can result in property damage personal injury or death WARNING Sharp metal edges can cause injury When installing the unit use care to avoid sharp edges WARNING ELECTRICAL SHOCK HAZARD Risk of electrical shock Disconnect all remote power ...

Page 2: ...fety codes Wear safety glasses and work gloves Use quenching cloth for brazing operations Have fire extinguisher available Read these instructions thoroughly and follow all warning or cautions attached to the unit 1 Always wear proper personal protection equipment 2 Always disconnect electrical power before removing panel or servicing equipment 3 Keep hands and clothing away from moving parts 4 Ha...

Page 3: ...lding not to exceed 1 4 per foot Figure 1 Slab Mounting Install on a Solid Level Mounting Pad The outdoor section is to be installed on a solid foundation This foundation should extend a minimum of 2 inches beyond the sides of the outdoor section To reduce the possibility of noise transmission the foundation slab should NOT be in contact with or be an integral part of the building foundation See F...

Page 4: ...nty will be void if the drier is not installed Installation of Line Sets DO NOT fasten liquid or suction lines in direct contact with the floor or ceiling joist Use an insulated or suspension type of hanger Keep both lines separate and always insulate the suction line Liquid line runs 30 feet or more in an attic will require insulation Route refrigeration line sets to minimize length DO NOT let re...

Page 5: ...ed in Table 3 Between 51 and 150 Linear Feet Crankcase heater and nonbleed port TXV factory installed No additional components required Vertical vapor riser must be sized to the vapor riser listed in the Table 4 on systems with line sets longer than 51 feet Use Table 4 and Table 5 to determine the correct liquid and vapor line sizes Over 150 Linear Feet not recommended Additional oil is not requir...

Page 6: ... line size shaded row on the outdoor tonnage C Select the actual Total Linear Length of your system shown at the top of the table D The elevation listed in the table is the maximum allowed for the liquid line listed E Select or consider the larger liquid line size shown in the table if the elevation does not meet your requirements Table 5 Liquid Line Diameter Selection Typical Existing Fixed Orifi...

Page 7: ...nts including line set and indoor coil must be an AHRI match with the unit in order to fulfill unit warranty requirements Fire Explosion and Personal Safety hazard Failure to follow this warning could result in damage personal injury or death Never use oxygen to pressurize or purge refrigeration lines Oxygen when exposed to a spark or open flame can cause fire and or an explosion that could result...

Page 8: ...ulb insulation is required if mounted external to the coil casing sensing bulb installation for bulb positioning STUB END TEFLON RING LIQUID LINE ASSEMBLY WITH BRASS NUT DISTRIBUTOR ASSEMBLY 3 Install one of the provided Teflon rings around the stubbed end of the check expansion valve and lightly lubricate the connector threads and expose surface of the Teflon ring with refrigerant oil 4 Attach th...

Page 9: ...round Do not crimp end of the line Remove service cap and core from both the vapor and liquid line service ports 1 2 LIQUID LINE SERVICE VALVE SERVICE PORT CORE SERVICE PORT CAP SERVICE PORT CORE SERVICE PORT CAP CUT AND DEBUR LINE SET SIZE MATCHES SERVICE VALVE CONNECTION DO NOT CRIMP SERVICE VALVE CONNECTOR WHEN PIPE IS SMALLER THAN CONNECTION 3 VAPOR LINE SERVICE VALVE COPPER TUBE STUB REFRIGER...

Page 10: ...VES POINT FLAME AWAY FROM SERVICE VALVE PREPARATION FOR NEXT STEP 7 WRAP SERVICE VALVES To help protect service valve seals during brazing wrap water saturated cloths around service valve bodies and copper tube stubs Use additionalwater saturated cloths underneath the valve body to protect the base paint 4 FLOW NITROGEN Flow regulated nitrogen at 1 to 2 psig through the refrigeration gauge set int...

Page 11: ... of the manifold gauge set in order to pressurize the line set and the indoor unit E After a few minutes open one of the service valve ports and verify that the refrigerant added to the system earlier is measurable with a leak detector F After the line set has been connected to the indoor and outdoor units check the line set connections and indoor unit for leaks Use the following procedure to test...

Page 12: ...uid refrigerant Open the manifold gauge valve 1 to 2 psig in order to release the vacuum in the line set and indoor unit G Perform the following Close manifold gauge valves Shut off HFC 410A cylinder Reinstall service valve cores by removing manifold hose from service valve Quickly install cores with core tool while maintaining a positive system pressure Replace stem caps and finger tighten them t...

Page 13: ... the outdoor unit R C W1 O and Y1 and Y1 is jumpered to Y2 in the outdoor unit Note that the published performance data is based upon the use of a two stage thermostat Refer to the 4HP18V field wiring diagram for a conventional 24VAC non communicating single stage thermostat 4HP18V Low Voltage Control Wiring Connections The 4HP18V variable capacity units are provided with 2 RAST 6 Pin connections ...

Page 14: ...ressure Figure 9 Table 6 4HP18V Thermostat Control Options Size Circuit and Install Service Disconnect Switch Refer to the unit nameplate for minimum circuit ampacity and maximum fuse or circuit breaker HACR per NEC Install power wiring and properly sized disconnect switch SERVICE DISCONNECT SWITCH MAIN FUSE BOX BREAKER PANEL Figure 6 NOTE Units are approved for use only with copper conductors Gro...

Page 15: ...emperature Rating 35 C Minimum More than 100 30m 16 Table 7 Conventional 24VAC Non Communicating Thermostat Wiring Route High Voltage and Ground Wires Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring To facilitate a conduit a cutout is located on the bottom of the control box Connect conduit to the control box using a proper conduit fitting ...

Page 16: ... C W1 R G TC TO ACC2 ACC1 Y1 O DH C W2 W1 R G DS W2 O D SENSOR OPTIONAL FOR SINGLE STAGE OPERATION INSTALL A JUMPER BETWEEN Y1 TO Y2 ON THE OUTDOOR UNIT TERMINAL STRIP Figure 9 Conventional 24VAC Cooling Non Communicating Thermostat Wiring Single Stage RAST 6 PIN CONNECTOR RAST 6 PIN CONNECTOR VARIABLE CAPACITY OUTDOOR UNIT TWO STAGE VARIABLE SPEED GAS FURNACE CONVENTIONAL 24VAC NON COMMUNICATING ...

Page 17: ...he intended capacity for the application is 3 or 5 Ton skip this section The units are field convertible to 2 Ton or 4 Ton to efficiently perform for the required application If the intended capacity is 2 or 4 Ton proceed to the following steps to program the unit type Outdoor unit must be powered ON and in idle mode no heating or cooling mode of operation NOTE The 36 unit can be programmed to ope...

Page 18: ...initiate the Charge Mode A heating blower demand must also be provided to initiate high speed blower operation on the indoor unit The compressor and outdoor fan motor will begin to ramp up and reach 100 design capacity within 3 minutes They will continue to operate at 100 design capacity for the duration of charge mode Exiting Charge Mode To exit the charging mode remove the Charge Mode Jumper fro...

Page 19: ...eating or cooling indoor blower operation In single stage thermostat applications a jumper must be installed between Y1 and Y2 on the 4HP18V outdoor control The compressor will be controlled in the variable capacity mode by varying the compressor capacity to obtain the target suction pressure set point If the heating or cooling demand remains after 20 minutes the 4HP18V control will begin to ramp ...

Page 20: ... to list the actual field charge Table 11 Refrigerant Charge Adjustment Liquid Line Set Diameter Oz Per 5 ft adjust from 15 ft line set 3 8 in 3 oz per 5 ft or 0 6 oz per 1 ft If line length is greater than 15 ft add this amount If line length is less than 15 ft remove this amount Mineral oils are not compatible with R 410A If oil must be added it must be a polyolester oil IMPORTANT NOTE Both airf...

Page 21: ...ng is completed replace service port cap Tighten finger tight then an additional 1 6 turn To Open Liquid or Suction Line Service Valve 1 Remove stem cap with an adjustable wrench 2 Use service wrench with a hex head extension to back the stem out counterclockwise as far as it will go Use a 3 16 hex head extension for liquid line service valves and a 5 16 extension for suction line service valves 3...

Page 22: ...mild detergent and rinsing with cold water Allow filter to dry before reinstalling Replace filters with the arrows pointing in the direction of airflow Dirty filters are the most common cause of poor heating cooling performance and compressor failures Indoor Coil If the system has been operated with a clean filter in place it should require minimal cleaning If cleaning is needed call your dealer f...

Page 23: ... pump to automatically switch from heating mode to cooling mode to maintain predetermined comfort settings Many heat pump thermostats are also equipped with an emergency heat mode which locks out heat pump operation and provides temporary heat supplied by the auxiliary heat Indicating Light Most heat pump thermostats have an amber light which indicates when the heat pump is operating in the emerge...

Page 24: ...Page 24 of 25 508133 01 Issue 2140 Figure 15 Wiring Diagram ...

Page 25: ...________ Actual Amps ______ Rated Volts _______ Actual Volts ________ Condenser Fan Full Load Amps _________ Actual Amps ______ Cooling Mode Suction Pressure ____________________ Liquid Pressure _________ Supply Air Temperature _______________ Ambient Temperature ___________ Return Air Temperature _________ System Refrigerant Charge Refer to manufacturer s information on unit or installation instr...

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