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©2017 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE OWNER FOR
FUTURE REFERENCE
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.
INSTALLATION
INSTRUCTIONS
VCFA Convertible Ceiling /
Floor-Mount Indoor Units
VRF SYSTEMS -- Ceiling/Floor Indoor Units
507444-05
03/2017
General
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 Specifi cation bulletin (EHB) for the
proper use of these indoor units with specifi 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.
Shipping and Packing List
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
!
As with any mechanical equipment, personal injury
can result from contact with sharp sheet metal edges.
Be careful when you handle this equipment.
1
CAUTION
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Related Manuals for Lennox VCFA012S4
Summary of Contents for Lennox VCFA012S4
- Page 1 INSTALLATION INSTRUCTIONS ©2017 Lennox Industries Inc. Dallas, Texas, USA VCFA Convertible Ceiling / Floor-Mount Indoor Units VRF SYSTEMS -- Ceiling/Floor Indoor Units 507444-05 03/2017 General 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...
- Page 2 Lennox VRF applications department are informed of these proposed changes. Upon receipt of this new information the Lennox VRF applications department will confi rm any changes that may be applicable to this installation. If changes are required, a new piping diagram will be produced and will supersede all other previously provided documents.
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Page 3: Rear View
Dimensions VCFA012S4, VCFA015S4, VCFA018S4, VCFA024S4 MOUNTING HOLES (4) (660) 7-7/8 (200) 7-1/8 8-1/8 (207) (181) 5-1/4 3-7/8 (134) DRAIN OUTLET (98) (Rear) 14-5/8 (371) 15-3/4 (401) 8-1/8 1-5/8 (41) (206) 1-3/8 (35) SIDE VIEW 35-3/4 (908) 39 (991) REAR VIEW... -
Page 4: Side View
VCFA036S4, VCFA048S4 MOUNTING HOLES (4) 26-3/4 (679) DRAIN OUTLET (Either Side) (255) 12-7/8 (185) 5-3/4 2-3/4 (70) 9-5/8 (146) 4-1/2 (244) 24-7/8 (631) 28-1/2 (725) (113) 60-3/4 (1543) SIDE VIEW 65-3/4 (1670) REAR VIEW 4-1/2 (116) PIPE FRESH AIR INTAKE LIQUID 4 (105) dia. - Page 5 Clearances CEILING APPLICATIONS 3/4” (19) DROP CEILING WALL 1” (25.4) SIDE VIEW SUPPLY CEILING AND FLOOR APPLICATIONS WALL WALL 24” (610) (610) FRONT VIEW FLOOR APPLICATIONS Unit Flush with Wall SUPPLY 24” (610) (Service Clearance Front of Unit) 1” (25.4) FLOOR SIDE VIEW...
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Page 6: Unit Placement
• Select a location where condensate line will have the Unit Placement shortest run to a suitable drain per local codes. In addition to clearances, the following items should be • Allow suffi cient space around unit for proper operation considered: and maintenance •... - Page 7 NOTE - drain to function properly. If necessary, a fi eld provided Threaded rod (requirement of Lennox warranty program) external pump can be installed at the unit. See fi gure 1 is the ONLY acceptable method of suspending the unit;...
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Page 8: Refrigerant Piping Connections
8. If necessary, install a fi eld-provided isolation grommet to Refrigerant Piping Connections prevent transmission of vibration from unit to structural ceiling. WARNING 9. Use either a mechanical lifting device or a minimum of Refrigerant leaks are unlikely; however, if a refrigerant leak two people to raise the unit. - Page 9 8. Once snug, continue another half-turn on each nut IMPORTANT! which should create a leak-free joint. A torque wrench compressor this unit contains may be used to tighten fl are nuts using table 2 oil (Polyvinylether). PVE oil is formulated for recommendations.
- Page 10 IMPORTANT! Condensate Piping Connections Drain should have a slope of at least ¼ inch per foot CAUTION and should be approved corrosion-resistant pipe. Make sure that drain piping is properly routed You must confi rm operation of every drain and pump and insulated in order to prevent both leaks and in the system as part of the commissioning proce- condensation.
-
Page 11: Wiring Connections
• Fit the power supply wiring of each unit with a switch Wiring Connections and fuse as shown in the wiring diagram. WARNING • Install a wiring interrupter or ground-fault circuit interrupter for the power wiring. Isolate the power supply before accessing unit •... - Page 12 Indoor units and MS boxes on the same refrigeration to the fan coil for servicing and maintenance purposes. circuit should have a common power supply but must Indoor unit and MS box power supply MUST not be taken have an independent disconnect switch installed adjacent from the outdoor unit.
- Page 13 NOTE - Each communication wire from the MS box should follow the refrigerant piping for that port. Figure 13. Typical Communication Wiring Diagram (VRF Heat Recovery System)
- Page 14 COMPONENT CAP1 FM1,FM2 INDOOR FAN ELECTRONIC GROUND GROUND EXPANSION VALVE INLET AIR TEMP. EVAP OUTLET TEMP IN COOLING MODE COIL TEMP. XP1-5 PLUG XS1-5 JACK CAP1 CAP2 FAN CAPACITOR TRANSFORMER WATER LEVEL SWITCH XT1-2 TERMINAL BLOCK LEVEL SWING MOTOR VERTICAL GMA,GMB SWING MOTOR •...
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Page 15: Water Level Switch
COMPONENT CAP1 FM1,FM2 INDOOR FAN ELECTRONIC GROUND GROUND EXPANSION VALVE INLET AIR TEMP. EVAP OUTLET TEMP IN COOLING MODE COIL TEMP. XP1-5 PLUG XS1-5 JACK CAP1 CAP2 FAN CAPACITOR TRANSFORMER WATER LEVEL SWITCH CN30 XT1-2 TERMINAL BLOCK LEVEL SWING MOTOR VERTICAL GMA,GMB SWING MOTOR... -
Page 16: Outside Air Connection
Outside Air Connection A limited amount of outside air can be brought into the VCFA036, 048 and 054 units (through the 4 inch (105 mm)) fresh air intake to be conditioned and mixed into the supply air. NOTE - Fresh air must be fi ltered as the connection is after the VCFA fi...