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©2017 Lennox Industries Inc. 

Dallas, Texas, USA

INSTALLATION
INSTRUCTIONS 

VRF SYSTEMS -- Ceiling/Floor Indoor Units
507444-05
03/2017

THIS MANUAL MUST BE LEFT WITH THE OWNER FOR 
FUTURE REFERENCE

Shipping and Packing List 

General

Check the components for shipping damage. If you 

fi

 nd any 

damage, immediately contact the last carrier. 

Package 1 of 1 contains the following:
1 - Assembled indoor unit
4 - Nuts
4 - Washers 
2 - Suspension brackets (ceiling mount) 

NOTE

  -

 not pro-

vided with VCFA054

2 - Mounting brackets (wall/

fl

 oor mount)

1 - Resistor
1 - Brass 

fl

 are nut

1 - Condensate drain 

fl

 exible pipe

1 - Condensate drain insulation sleeve (VCFA054 only)
1 - Water level switch cable
1 - Installation manual

VCFA Convertible Ceiling /
Floor-Mount Indoor Units

The VCFA ceiling/

fl

 oor-mount non-ducted indoor units are 

matched with an outdoor heat recovery or heat pump unit 
to create a VRF (variable refrigerant 

fl

 ow) system that uses 

HFC-410A refrigerant. The units can be suspended from 
the ceiling in a horizontal position or installed on the wall 
near the 

fl

 oor in a vertical position.

Refer to the Product Speci

fi

 cation bulletin (EHB) for the 

proper use of these indoor units with speci

fi

 c heat pumps, 

heat recovery units, mode switching devices, branch pipes, 
line sets and controls. 
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.
The State of California has determined that this 
product may contain or produce a chemical or 
chemicals, in very low doses, which may cause 
serious illness or death. It may also cause cancer, 
birth defects, or reproductive harm.

CAUTION

!

As with any mechanical equipment, personal injury 
can result from contact with sharp sheet metal edges. 
Be careful when you handle this equipment.

Содержание VCFA012S4

Страница 1: ...ions 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 service...

Страница 2: ...036 36 000 Btuh 048 48 000 Btuh 054 54 000 Btuh Voltage P 208 230V 1 phase 60hz System Piping CAUTION VRF system piping is customized for each installation The LVSS piping report is an engineered desi...

Страница 3: ...SIDE VIEW 3 7 8 97 2 1 2 64 MOUNTING HOLES 4 DRAIN OUTLET Either Side DRAIN OUTLET Rear 50 3 8 1280 47 1195 21 1 2 547 20 1 4 515 8 1 8 207 1 1 2 38 1 5 8 41 26 660 7 7 8 200 7 1 8 181 5 1 4 134 3 7 8...

Страница 4: ...8 185 5 3 4 146 MOUNTING HOLES 4 DRAIN OUTLET Either Side VCFA036S4 VCFA048S4 FRESH AIR INTAKE 4 105 dia REAR VIEW SIDE VIEW BOTTOM VIEW 65 3 4 1670 65 1 2 1613 42 1 8 1070 LIQUID LINE SUCTION LINE 1...

Страница 5: ...VIEW SIDE VIEW SIDE VIEW SUPPLY AIR SUPPLY AIR 24 610 Service Clearance Front of Unit DROP CEILING 3 4 19 WALL WALL CEILING APPLICATIONS CEILING AND FLOOR APPLICATIONS FLOOR APPLICATIONS Unit Flush wi...

Страница 6: ...formance horizontal installation only Ensure the structural wall floor or ceiling can support the weight of the unit Installation Floor Wall Applications 1 Locate a suitable position within the space...

Страница 7: ...aded rods to suspend the indoor unit If the structural ceiling includes wooden joists use angle iron or Unistrut channel fixed securely in place to accept the threaded rods NOTE Threaded rod requireme...

Страница 8: ...connected to the indoor unit Table 1 lists the connection sizes at the indoor unit The connections are made using the provided brass flare nuts at the end of the refrigerant piping connections Both l...

Страница 9: ...ion Outside Diameter Recommended Torque No torque wrench available Finger tighten and use an appropriately sized wrench to turn an additional Inches U S 1 4 15 ft lb 1 4 turn 3 8 26 ft lb 1 2 turn 1 2...

Страница 10: ...ain etc to ensure that the line will drain freely 4 After the system installation is complete the condensate drain line must be checked for leaks and proper drainage If a field provided condensate pum...

Страница 11: ...over tightened screws might be damaged Refer to the table below for the tightening torque of the terminal screws A disconnection device having an air gap contact separation in all active conductors s...

Страница 12: ...L1 L2 L3 L1 L2 L1 L2 Single Phase power wiring PQE PQE Indoor units and MS boxes on the same refrigeration circuit should have a common power supply but must have an independent disconnect switch inst...

Страница 13: ...13 Figure 13 Typical Communication Wiring Diagram VRF Heat Recovery System NOTE Each communication wire from the MS box should follow the refrigerant piping for that port...

Страница 14: ...7 21 5 1 3 6 86 7 21 8 725 6 POWER IN 208 230V 1 PHASE 60 hz Figure 14 VCFA012 48S4 1 Wiring Diagram Figure 15 VCFA054S4 1 Wiring Diagram 1 1 75 7 7 7 7 6 6 6 6 1 21 21 21 21 1 1 1 1 9 1 1 7 1 2 6 3...

Страница 15: ...OCK EVAP OUTLET TEMP IN COOLING MODE PLUG JACK LEVEL SWING MOTOR GND CN30 FAN CTON HTON AUXH HHE interface Current range 0 1A Voltage range 0 AC DC24V L1 L2 GROUND GMA GMB EEV T2B T2 TR XS1 11 XP1 11...

Страница 16: ...e Air Knockout Outside Air Knockout 1 Knock out the outside air supply opening See figure 18 2 Remove any insulation 3 Connect the outside air duct to cassette body using the four screw holes shown in...

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