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©2018 Lennox Industries Inc. 

Dallas, Texas, USA

INSTALLATION/OPERATION 

INSTRUCTIONS 

Mini-VRF Heat Pump

VPA***H4-2P

VRF SYSTEMS 

OUTDOOR UNITS

507641-07

04/2018

THIS MANUAL MUST BE LEFT WITH THE 

OWNER FOR FUTURE REFERENCE

These instructions are intended as a general guide and do 
not supersede local codes in any way. Consult authorities 
having jurisdiction before installation.

Shipping and Packing List 

General

Check the components for shipping damage. If you 

fi

 nd any damage, immediately contact the last car-

rier. Package 1 of 1 contains the following:
1 - Assembled Mini-VRF heat pump outdoor unit

1 - Outdoor unit installation instruction

The Mini-VRF heat pump outdoor units are matched 
with up to nine indoor units to create a VRF (variable 
refrigerant 

fl

 ow) system that uses R-410A refrigerant.

Refer to the Product Speci

fi

 cation bulletin (EHB) for 

the proper use of these heat pumps with matching 
indoor units, branch boxes, branch pipes, line sets 
and controls.
These instructions are intended as a general guide 
and do not supersede local or national codes in any 
way. Authorities having jurisdiction should be con-
sulted before installation.

 WARNING

Improper installation, adjustment, alteration, ser-
vice or maintenance can cause property damage, 
personal injury or loss of life.
Installation and service must be performed by a li-
censed professional HVAC installer, service agency 
or the gas supplier.
Failure to follow safety warnings and these instruc-
tions exactly could result in property damage, dan-
gerous operation, serious injury, or death.
Any additions, changes, or conversions required in 
order for the appliance to satisfactorily meet the ap-
plication needs must be made by a licensed profes-
sional HVAC installer (or equivalent) using factory-
specifi ed parts.
Do not use this system if any part has been under 
water. A fl ood-damaged appliance is extremely dan-
gerous. Immediately call a licensed professional 
HVAC service technician (or equivalent) to inspect 
the system and to replace all controls and electrical 
parts that have been wet, or to replace the system, if 
deemed necessary.

 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.

 IMPORTANT

The Clean Air Act of 1990 bans the intentional venting 
of refrigerant (CFC’s and HCFC’s) as of July 1, 1992. 
Approved methods of recovery, recycling or reclaiming 
must be followed. Fines and/or incarceration may be 
levied for non-compliance.

Summary of Contents for VPA036H4

Page 1: ...tallation adjustment alteration ser vice or maintenance can cause property damage personal injury or loss of life Installation and service must be performed by a li censed professional HVAC installer service agency or the gas supplier Failure to follow safety warnings and these instruc tions exactly could result in property damage dan gerous operation serious injury or death Any additions changes ...

Page 2: ...ion Software LVSS piping report is an engineered design that must be followed The piping diagram or diagrams included within the LVSS report have been prepared based on the information provided to the Lennox VRF applications department When the indicated lengths change from the figures stated within the report it is imperative that prior to the commencement of the refrigerant pipe work installatio...

Page 3: ... 400 13 3 4 349 12 5 8 321 3 4 19 23 5 8 600 6 152 CC CENTER OF GRAVITY DD BB AA EE FF Dimensions Inches mm CORNER WEIGHTS CENTER OF GRAVITY Model No AA BB CC DD EE FF lbs kg lbs kg lbs kg lbs kg in mm in mm All Models 40 18 63 29 72 33 45 21 21 5 8 549 7 3 8 187 ...

Page 4: ...10 Minimum Service Clearance 12 305 Minimum 79 2007 Minimum 24 610 Minimum Service Clearance 12 305 Min 118 2997 Min 118 2997 Min 20 508 Min 79 2007 Min Back to Back Facing Units Front to Back Wall or Partition Wall or Partition Wall or Partition NOTE 24 in 610 mm clearance required on top of unit NOTE If unit is surrounded on three or four sides by walls or partitions that are taller than 10 ft 3...

Page 5: ...nches 102 mm above the roof or ground surface to avoid ice build up around the unit Locate the unit above a load bearing wall or area of the roof that can adequately support the unit Consult local codes for rooftop applications Use a field provided slab or frame as specified in the Product Specifications EHB bulletin Install the unit in an upright and level position If the unit coil cannot be inst...

Page 6: ...lab or Frame Brackets are provided at the base of the outdoor unit so that it can be secured to a field provided slab or frame Use lag bolts or equivalent to secure the outdoor unit to the slab or frame Figure 1 Air Inlet Air Outlet 12 in 305 mm Figure 2 Unit on Wall Mounted Brackets NOTE Minimum rear clearance can be 6 inches 152 mm when mounted on brackets and with no obstructions on the other t...

Page 7: ...around the air inlet and the air outlet The unit must not be installed in areas where a flammable gas leak may occur Figure 4 Unit on Pedestal Stand Above Snow Line Protective canopy Front View Side View Protective canopy Pedestal stand NOTE VPA H4 2P units have a factory installed base pan heater CAUTION When operating the heat pump in a low outdoor ambient temperature be sure to follow the instr...

Page 8: ...l times Common application examples are Construct a wind barrier Size barrier at least the same height and width as outdoor unit Install a barrier 12 inches 305 mm minimum from the sides of the unit in the direction of prevailing winds Install outdoor unit in dog house style shelter Install outdoor unit in alcove under roof overhang 12 in 305 mm 24 in 610 mm 24 in 610 mm 12 in 305 mm Figure 9 Unit...

Page 9: ...d In addition to insulating each line of piping buried lines must rest inside a sealed watertight conduit The conduit must be designed so it cannot collect and retain water NOTE Minimum clearances apply Insulated Refrigerant Pipes Watertight seal Conduit Structure Watertight seal Watertight seal Figure 11 Buried Refrigerant Pipe Protection ...

Page 10: ...er the unit NOTES Louver angle should not exceed 15 Installing the Unit Inside of Building Mini VRF outdoor units may be installed indoors if the following guidelines are followed Refer to Figure 12 for critical clearances If field fabricating ductwork to directly discharge air outdoors use the dimensions shown in Fig ure 15 as a guide Include inspection doors in discharge ductwork within 12 inche...

Page 11: ...n top of unit Makeup air requirements are equal to or greater than discharge air volume Size makeup air openings appropriately to supply adequate air for the outdoor unit Unit clearances apply Check fan load amps FLA during Forced Cooling operation after installation Install a field supplied drain pan under the unit NOTES Louver angle should not exceed 15 Figure 13 Louvered Discharge Opening Consi...

Page 12: ...keup air requirements are equal to or greater than discharge air volume Size makeup air openings appropriately to supply adequate air for the outdoor unit Unit clearances apply Check fan load amps FLA during Forced Cooling operation after installation Install a field supplied drain pan under the unit NOTES Louver angle should not exceed 15 Figure 14 Ducted Discharge Considerations Figure 15 Unit F...

Page 13: ...ping connections Both liquid and gas vapor lines must be individually insulated Model Liquid Line Gas Vapor Line VPA036H4 VPA048H4 VPA060H4 3 8 in 3 4 in Table 1 Refrigerant Piping Connections WARNING Refrigerant leaks are unlikely however if a refrigerant leak occurs open a door or windows to dilute the refrigerant in the room Turn off the unit and all other appliances that may cause a spark Call...

Page 14: ...nine indoor units three branch boxes must be used From Outdoor Unit First Elbow or Branch Pipe Connection 39 991 mm 20 508 mm To Indoor Unit Branch Box Figure 17 Straight Pipe In and Out A minimum of 39 inches 991 mm of straight pipe into the branch box A minimum of 20 inches 508 mm of straight pipe out of the branch box See Figure 17 When using branch pipes to connect multiple indoor units with a...

Page 15: ...this unit contains PVE oil Polyvinylether PVE oil is formulated for hydrofluorocarbon HFC refrigerants such as R 410a which this system contains While it may have some miscibility properties with mineral based oil and POE oil Polyolester it is not recommended to mix PVE oil with any other type of refrigerant oil IMPORTANT Always use two wrenches when tightening flare nuts to avoid twisting refrige...

Page 16: ... Maximum Piping Length Actual Length 148 ft 45 m VPA036 048 196 ft 60 m VPA060 L1 L3 L4 L5 L6 E Equivalent Length 164 ft 50 m VPA036 048 230 ft 70 m VPA060 Pipe length from the first line branch pipe to farthest indoor unit 65 6 ft 20 m L3 L4 L5 L6 E Pipe length from the indoor unit to the nearest branch pipe 49 2 ft 15 m L2 A B C D E Maximum Height Difference Indoor Unit to Outdoor Unit Maximum H...

Page 17: ...Unit Maximum Height Difference 26 2 ft 8 m Description Designation Main Outdoor Pipe from outdoor unit to branch box L1 Indoor Unit Pipe from Branch Box es to indoor units A B C D A B C Indoor unit Branch Box 20m L1 8m Maximum Permitted Refrigerant Pipe Length and Maximum Height Difference With Branch Box NOTE See Refrigerant Pipe Selection Table to size Main Outdoor Pipe NOTE Branch Box es should...

Page 18: ... Length Piping Pipe Length Total Piping Length Actual 328 ft 100 m L1 A B C D E F L3 L4 Maximum Piping Length Actual Length 148 ft 45 m VPA036 048 196 ft 60 m VPA060 L1 L4 A L1 L4 B L1 L4 C L1 L4 D L1 L3 E L1 L3 F Equivalent Length 164 ft 50 m VPA036 048 230 ft 70 m VPA060 Pipe length from the first Branch Pipe to each indoor unit 65 6 ft 20 m L4 A L4 B L4 C L4 D L3 E L3 F 65 6 ft 20 m each Maximu...

Page 19: ...ength Actual 328 ft 100 m L1 A B C D E F G H L3 L4 L5 L6 Maximum Piping Length Actual Length 148 ft 45 m VPA036 048 196 ft 60 m VPA060 L1 L4 L6 A L1 L4 L6 B L1 L4 L6 C L1 L4 L6 D L1 L4 L5 E L1 L4 L5 F L1 L3 H L1 L3 G Equivalent Length 164 ft 50 m VPA036 048 230 ft 70 m VPA060 Pipe length from the first Branch Pipe to each indoor unit 65 6 ft 20 m L4 L6 A L4 L6 B L4 L6 C L4 L6 D L4 L5 E L4 L5 F L3 ...

Page 20: ... V8IDBP02 NOTES Use appropriate reducer adapter not provided at the outdoor unit pipe connections to meet the piping size requirements Refrigerant Pipe Selection INDOOR PIPE SELECTION L2 A B C D E F G H Indoor Unit Type Indoor Unit Size Gas Pipe Diameter Liquid Pipe Diameter V22A Compact 360 Cassette 007 009 012 015 1 2 in 1 4 in V33A Standard High Efficiency 360 Cassette 009 012 015 1 2 in 1 4 in...

Page 21: ...ressure test specifications in table 1 and the triple evacuation process de scribed on this page to pressure test and evacu ate the system Use a vacuum pump capable of evacuating to lower than 500 Microns 0 5 Torr Do not open any of the outdoor unit shut off valves possible max 5 valves The outdoor unit does not need to be evacuated Evacuate the system to 500 Microns 0 5 Torr or below for 4 hours ...

Page 22: ...harge for each liquid line branch pipe kit 3 If the ratio of VMDB or V33B Indoor unit capacity exceeds 80 of all indoor units use Table 5 to determine the additional refrigerant charge to add 4 Total all calculations 5 Add the calculated additional refrigerant to the system Liquid Line Length Calculation Calculate additional refrigerant charge using the diameter and length of the liquid pipe Incom...

Page 23: ...dify the power cord in any way Do not attempt to extend the length of the power cord or use an extension cord with this appliance Do not share the single power outlet with any other appliances CAUTION This unit must be properly grounded and protected by a circuit breaker The ground wire for the unit must not be connected to a gas or water pipe a lightning conductor or a telephone ground wire Do no...

Page 24: ...rent overload High condenser temperature Error description EEPROM error DC Fan error High indoor coil temperature E 9 Communication error between compressor module and main board T3 or T4 error temperature sensor Communication error between indoor unit and outdoor unit High radiator temperature Reserved 3 times of L0 or L1 in 60 minutes CODE PART NAME Compressor speed difference 15Hz between adjac...

Page 25: ...2 L1 P Q E Outdoor unit Incoming Electrical Supply Figure 26 Typical Communication Wiring Outdoor unit PQE Ground cable shield DO NOT connect to E 18 GA stranded 3 conductor shielded control wire polarity sensitive All shields of shielded cable connect to GROUND terminal not to E Install a terminating resistor at the last indoor unit terminals P and Q of the daisy chain Typical Wiring Diagram NEC ...

Page 26: ...Wiring Diagram NEC CEC and Local Codes apply P Q Figure 27 Typical Communication Wiring Outdoor unit PQE Ground cable shield DO NOT connect to E Branch box Refrigerant piping Branch box 18 GA stranded 3 conductor shielded control wire polarity sensitive All shields of shielded cable connect to GROUND terminal not to E Install a terminating resistor at the last indoor unit terminals P and Q of the ...

Page 27: ... unit terminals P and Q of the daisy chain Typical Wiring Diagram NEC CEC and Local Codes apply P Q Branch box NOTE Branch box does not require power or communication wiring Refrigerant piping After the system has been installed the outdoor unit will automatically assign addresses to all connected indoor units These addresses may be modified using an optional remote control as part of the commissi...

Page 28: ... value in C 7 T5 Compressor discharge temperature If T5 99 it will only show the front two digits of the actual temperature For example it will show 10 when T5 is 105 8 Reserved Reserved 9 Opening of EEV Actual value 8P 10 Unit current Amps 11 1 10 of DC bus voltage 12 T2 T2B average temperature T2 Heat T2B Cooling When system operates cooling it shows T2B when system operates heating it shows T2 ...

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