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Allied 4HP16LT Series, Installation Instructions Manual, Page: 1 / 24

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Allied 4HP16LT Series Installation Instructions Manual Download Page 1

506468-01

Page 1 of 24

Issue  1946

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INSTALLATION INSTRUCTIONS

4HP16LT Series

Split System Heat Pump

   

(P) 506468-01

*P506468-01*

Manufactured By

Allied Air Enterprises LLC

A Lennox International, Inc. Company

215 Metropolitan Drive

West Columbia, SC 29170

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

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

Table of Contents

General ........................................................................... 1

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

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

Electrical Wiring ............................................................ 12

Start-Up ........................................................................ 13

Operation ...................................................................... 14

Control Board Diagnostics and Test Mode ................... 16

Maintenance ................................................................. 21

Homeowner Information ............................................... 21

General

Read this entire instruction manual, as well as the 

instructions supplied in separate equipment, before starting 

the installation. Observe and follow all warnings, cautions, 

instructional labels, and tags. Failure to comply with these 

instructions could result in an unsafe condition and/or 

premature component failure.

These instructions are intended as a general guide only 

for use by qualified personnel and do not supersede any 

national or local codes in any way. The installation must 

comply with all provincial, state, and local codes as well as 

the National Electrical Code (U.S.) or Canadian Electrical 

Code (Canada). Compliance should be determined prior 

to installation.

4HP16LT units use R410A which is an ozone-friendly HFC 

refrigerant. This unit must be installed with a matching 

indoor coil and line set. A filter drier approved for use with 

410A is installed in the unit. 

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

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.

Summary of Contents for 4HP16LT Series

Page 1: ...al as well as the instructions supplied in separate equipment before starting the installation Observe and follow all warnings cautions instructional labels and tags Failure to comply with these instructions could result in an unsafe condition and or premature component failure These instructions are intended as a general guide only for use by qualified personnel and do not supersede any national ...

Page 2: ...e when lifting avoid contact with sharp edges Installation NOTE In some cases noise in the living area has been traced to gas pulsations from improper installation of equipment Locate unit away from windows patios decks etc where unit operation sounds may disturb customer Leave some slack between structure and unit to absorb vibration Place a sound absorbing material such as Isomode under the unit...

Page 3: ...ucted by a wall or other barrier Table 2 Clearances 30 around Control Box 24 6 NOTE See Table 2 for specific minimum clearance guidelines Figure 2 DO LOCATE THE UNIT With proper clearances on sides and top of unit On a solid level foundation or pad unit must be level to within 1 4 in ft per compressor manufacturer specifications To minimize refrigerant line lengths DO NOT LOCATE THE UNIT On brick ...

Page 4: ...d Size 12 ft 25 ft 50 ft 75 ft 100 ft 24 000 3 4 7 8 3 4 7 8 7 8 36 000 7 8 7 8 7 8 7 8 1 1 8 48 000 7 8 7 8 7 8 1 1 8 1 1 8 60 000 1 1 8 1 1 8 1 1 8 1 1 8 1 1 8 For lines longer than 50 ft refer to long line set guidelines Table 3 Refrigerant Line Set Diameters in Be extra careful with sharp bends Tubing can kink very easily and if this occurs the entire tube length will have to be replaced Extra...

Page 5: ... UNIT VAPOR LINE SERVICE VALVE VAPOR LIQUID 1 A B C D A Cylinder with clean R 410A positioned to deliver liquid refrigerant to the vapor service valve B Refrigerant gauge set low side to the liquid line valve C Refrigerant gauge set center port to inlet on the recovery machine with an empty recovery tank connected to the gauge set D Connect recovery tank to recovery machine per machine instruction...

Page 6: ...oil Shown Sensing bulb 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 refriger...

Page 7: ...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 8: ...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 9: ... 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 10: ...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 11: ...ench 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 Replace the stem cap Tighten finger tight then tighten an additional 1 6 turn To Close Liquid or Suction Line Service Valve 1 Remove the stem cap with an adjustable wrench 2 Use a service wrench...

Page 12: ...iring 2 Ground unit at unit disconnect switch or to an earth ground To facilitate conduit a hole is in the bottom of the control box Connect conduit to the control box using a proper conduit fitting Units are approved for use only with copper conductors 24V Class II circuit connections are made in the low voltage junction box A complete unit wiring diagram is located inside the unit control box co...

Page 13: ...le 4 for refrigerant charge adjustment A blank space is provided on the unit rating plate to list the actual field charge Table 4 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 compatibl...

Page 14: ...the compressor during test mode High Pressure Switch HI PS When the high pressure switch trips the control board will cycle off the compressor and the strike counter in the board will count one strike Pressure Switch Settings High Pressure auto reset trip at 590 psig reset at 418 Low Pressure auto reset trip at 25 psig reset at 40 5 Strike Lockout Feature The internal control logic of the board co...

Page 15: ...frost mode Units are shipped with jumper installed on DELAY pins NOTE The 30 second compressor delay feature known as the quiet shift must be deactivated during any unit performance testing The feature is deactivated by removing the jumper located on the compressor delay pins Sensor Temperature Range F C Red LED DS1 Pins Wire Color Outdoor ambient 35 37 to 120 48 280 000 to 3750 3 4 black Coil 35 ...

Page 16: ...le will be initiated after 30 minutes of heating mode compressor run time The control will attempt to self calibrate after this and all other defrost cycle s Calibration success depends on stable system temperatures during the 20 minute calibration period If the board fails to calibrate another defrost cycle will be initiated after 45 minutes of heating mode compressor run time Once the control bo...

Page 17: ...in system 3 Improper metering device installed or incorrect operation of metering device 4 Incorrect or improper sensor location or connection to system 1 Remove any blockages or restrictions from coils and or fans Check indoor and outdoor fan motor for proper current draws 2 Check system charge using approach sub cooling temperatures 3 Check system operating pressures and compare to unit charging...

Page 18: ...Page 18 of 24 506468 01 Issue 1946 24V No 24V ...

Page 19: ...the control board without experiencing nuisance alerts Thermostat Wiring The diagnostic module requires a thermostat demand signal to operate properly See Figure 6 for connections The thermostat signal input is 24VAC and should not be less than 0 5VAC Mis wired Module Codes Depending on the system configuration some ALERT flash codes may not be active The presence of safety switches affects how th...

Page 20: ...rmer is overloaded 2 Low line voltage contact utility if voltage at disconnect is low Check wiring conditions Table 7 Diagnostic Module Codes Mis wired Module Troubleshooting Mis wired Module Indication Recommended Troubleshooting Action Green LED is not on module does not power up Determine if both R and C module terminals are connected Verify voltage is present at module s R and C terminals Revi...

Page 21: ...bent fins may affect unit operation SHARP OBJECT HAZARD Condenser coils have sharp edges Wear adequate body protection on body extremities e g gloves FAILURE TO FOLLOW THIS WARNING COULD RESULT IN BODILY INJURY WARNING Painted Surfaces For maximum protection of the unit s finish a good grade of automobile wax should be applied every year In geographical areas where water has a high concentration o...

Page 22: ...the defrost cycle In case of extended power outage If the outdoor temperature is below 50 F and power to your outdoor unit has been interrupted for one hour or longer observe the following when restoring power to your heat pump system Set the room thermostat selector to the Emergency Heat setting to obtain temporary heat for a minimum of 6 hours This will allow system refrigerant pressures and tem...

Page 23: ...506468 01 Page 23 of 24 Issue 1946 Figure 9 Two Stage Wiring Diagram 24 36 48 Models Only ...

Page 24: ...Page 24 of 24 506468 01 Issue 1946 Figure 10 Two Stage Wiring Diagram 60 Model Only ...

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