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©2018 Lennox Industries Inc.
Dallas, Texas, USA
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.
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.
INSTALLATION/OPERATION
INSTRUCTIONS
Mini-VRF Heat Pump
VPA***H4-2P
VRF SYSTEMS
OUTDOOR UNITS
507641-07
04/2018
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.
General
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 Specifi 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.
Shipping and Packing List
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
1
CAUTION
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Related Manuals for Lennox VPA048H4
Summary of Contents for Lennox VPA048H4
- Page 1 INSTALLATION/OPERATION INSTRUCTIONS Mini-VRF Heat Pump ©2018 Lennox Industries Inc. Dallas, Texas, USA VPA***H4-2P VRF SYSTEMS OUTDOOR UNITS 507641-07 04/2018 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.
- Page 2 H = High Effi ciency NOTE - Lennox VRF and Lennox Mini-Split products are similar in appearance to each other. Refer to the unit’s model number to determine if the unit is a VRF (V) or Mini-Split (M) unit. It is not possible to mix the two types of equipment on any system.
- Page 3 Dimensions - Inches (mm) CORNER WEIGHTS CENTER OF GRAVITY Model No. lbs. lbs. lbs. lbs. All Models 21-5/8 7-3/8 23-5/8 (600) (152) (19) CENTER OF 13-3/4 14-1/4 12-5/8 15-3/4 GRAVITY (349) (362) (321) (400) TOP VIEW 52-1/4 (1327) 35-3/8 (899) FRONT VIEW...
- Page 4 NOTE - If unit is surrounded on three or four sides by walls or partitions that are taller than 10 ft. (3 m), call Lennox VRF Applications group to discuss additional requirements. NOTE - 24 in. (610 mm) clearance required on top of unit.
- Page 5 Unit Placement IMPORTANT WARNING Exhaust vents from dryers, water heaters and furnaces should be directed away from the Use the provided and specifi ed components when outdoor unit. Prolonged exposure to exhaust installing equipment. Failure to do so may result in gases and the chemicals contained within them unit falling, water leaking or electrical shocks, caus- may cause condensation to form on the steel...
- Page 6 Condensate Drains Securing Outdoor Unit to Slab or Frame • The bottom of the outdoor unit is equipped with • Brackets are provided at the base of the outdoor multiple drain holes to route water away from the unit so that it can be secured to a fi eld-provided unit during a defrost cycle.
- Page 7 Cold Climate Considerations Protective Protective canopy canopy CAUTION When operating the heat pump in a low outdoor ambient temperature, be sure to follow the instructions described below. 24 in - To prevent exposure to wind, install the outdoor unit 610 mm with its suction side facing the wall.
- Page 8 Prevailing Winds Protection If unit coil cannot be installed away from prevailing winter winds, some method of protecting the coil is required. Minimum clearances from wind 12 in barrier must be observed at all times. Common 305 mm application examples are: Air Inlet •...
- Page 9 Buried Refrigerant Pipe Protection All refrigerant lines must be insulated • regardless of if it is buried. • 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.
- Page 10 Installing the Unit Inside of Building • Allow enough space between the unit and exte- Mini-VRF outdoor units may be installed indoors if the following guidelines are followed. rior wall to allow for coil service. • Provide a drain pan underneath the unit to pre- •...
- Page 11 Exterior Wall Discharge Air Opening Unit Rear Supply air inlet requirements 1721.06 sq.in. CFM = 4100 (914) (1397) Minimum Before (Service Adjacent Clearance) Obstructions NOTES- Louver angle should not exceed 15°. 24 in. (610 mm) clearance required on top of unit. Makeup air requirements are equal to or greater than discharge air volume.
- Page 12 Exterior Wall Field-Supplied Duct Unit Field-supplied foam Rear insulating tape NOTES- Louver angle should not exceed 15°. Inspection Door 24 in. (610 mm) clearance required on top of unit. within 12 inches Makeup air requirements are equal to or greater than discharge air (305 mm) of unit volume.
- Page 13 • The three-ton VPA036H4 can provide cooling to as many as fi ve indoor units. • The four-ton VPA048H4 can serve up to seven indoor units. • The fi ve-ton VPA060H4 can serve up to nine in- door units.
- Page 14 When multiple indoor units are served by a single A minimum of 39 inches (991 mm) of straight pipe outdoor unit, the refrigerant piping must be connect- into the branch box. ed using either branch box(es) or individual branch A minimum of 20 inches (508 mm) of straight pipe pipes.
- Page 15 NOTE - Always slide a fl are nut onto the fi eld-provided IMPORTANT refrigerant piping before fl aring the lines. Always use two wrenches when tightening fl are 1. The seal on the unit refrigerant piping connections should remain in place until the last possible moment. nuts to avoid twisting refrigerant piping.
- Page 16 Maximum Permitted Refrigerant Pipe Length and Maximum Height Difference - With Branch Pipe NOTE - See Refrigerant Pipe Selection Table to size Main Outdoor Pipe. Mini-VRF Description Designation Heat Pump Main Outdoor Pipe - from outdoor unit to fi rst branch pipe Outdoor unit Main Indoor Pipe - from branch pipe to branch pipe L3, L4, L5, L6...
- Page 17 Heat Pump Branch Boxes cannot be connected in series. Outdoor unit NOTE - In applications requiring more than one Branch Box, call Lennox VRF Applications Department for assistance. Branch Box Indoor unit Length and Maximum Height Difference Maximum Permitted Length...
- Page 18 Maximum Permitted Refrigerant Pipe Length and Maximum Height Difference - With Branch Box NOTE - See Refrigerant Pipe Selection Table to size Main Outdoor Pipe. Description Designation Main Outdoor Pipe - from outdoor unit to fi rst Branch Pipe Main Indoor Pipe - from Branch Pipe to each Branch L3, L4 Box(es) Indoor Unit Pipe - from Branch Box(es) to indoor units...
- Page 19 Maximum Permitted Refrigerant Pipe Length and Maximum Height Difference - With Branch Box NOTE - See Refrigerant Pipe Selection Table to size Main Outdoor Pipe. Description Designation Main Outdoor Pipe - from outdoor unit to fi rst Branch Pipe Main Indoor Pipe - from Branch Pipe to each Branch L3, L4, L5, L6 Box(es) or Branch Pipe Indoor Unit Pipe - from Branch Box(es) to indoor units...
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Page 20: Refrigerant Pipe Selection
45 to 130% More than 148 ft. (45 m) 3/4 in. V8IDBP01 Less than 148 ft. (45 m) 5/8 in. VPA048H4 4 Ton 3/8 in. 45 to 130% More than 148 ft. (45 m) 3/4 in. Less than 148 ft. (45 m) 3/4 in. - Page 21 8000 Microns (8 Torr) Evacuate System using all service valves. • Follow the Lennox pressure test specifi cations 2. Break the vacuum by allowing nitrogen into the in table 1 and the triple evacuation process de- three inter-connecting pipework port connections...
- Page 22 Additional Refrigerant Charge When refrigerant piping connections have been 1. Calculate the additional refrigerant charge using completed, it will be necessary to adjust the system the diameter and length of the liquid pipe (only) refrigerant charge based on the diameter and length using Table 4 below.
- Page 23 Wiring Connections WARNING CAUTION Isolate the power supply before accessing unit electrical This unit must be properly grounded and protected terminals. by a circuit breaker. The ground wire for the unit must not be connected to a gas or water pipe, a lightning Install unit so that unit disconnect is accessible.
- Page 24 FAN-TOP Error Code For Outdoor Unit Error description FAN-BOTTOM Communication error between indoor unit and outdoor unit T3 or T4 temperature sensor error Power voltage out of range DC Fan error Compressor discharge temperature sensor error POWER DRIVER BLACK EEPROM error BOARD EEPROM not match main chip E.9.
- Page 25 Power(208/230V 1PH 60Hz) Incoming Electrical Supply Incoming Electrical Supply Outdoor unit P Q E Indoor unit Indoor unit Indoor unit C D E C D E C D E J- Box J- Box J- Box Power wire between indoor units Figure 25.
- Page 26 Outdoor unit Branch box Note: Branch box does not require power or communication wiring (PQE) Refrigerant piping Ground cable shield DO NOT connect to E Install a terminating resistor at the last indoor unit (terminals P and Q) of the daisy chain. All shields of shielded cable connect to GROUND terminal, not to E.
- Page 27 Outdoor unit Refrigerant piping NOTE - Branch box does not require power or communication wiring Branch box Branch box Branch box (PQE) Refrigerant piping Ground cable shield DO NOT connect to E Install a terminating resistor at the last indoor unit (terminals P and Q) of the daisy chain. All shields of shielded cable connect to GROUND terminal, not to E.
- Page 28 SW2 Query Instructions No**. Parameter description Parameter value* If all indoor units off, it will show the quantity of all indoor units; if the outdoor 0 Normal display unit is in time delay, it will show 0; if the outdoor unit is running, it will show compressor speed.