Lennox VCFA012S4, VCFA015S4, VCFA024S4, VCFA030S4, VCFA018S4 Installation Instructions Manual

©2017 Lennox Industries Inc.

THIS MANUAL MUST BE LEFT WITH THE OWNER FOR
FUTURE REFERENCE

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 li­censed professional HVAC installer, service agency
or the gas supplier.
Failure to follow safety warnings and these instruc­tions exactly could result in property damage, dan­gerous operation, serious injury, or death.
Any additions, changes, or conversions required in
order for the appliance to satisfactorily meet the ap­plication needs must be made by a licensed profes­sional HVAC installer (or equivalent) using factory­specifi 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.

Dallas, Texas, USA

!

WARNING

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

!

CAUTION

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

1

Safety Requirements

!

WARNING

ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD.
Do not touch the unit or the controller if your hands are wet.
DO NOT spray water on the indoor unit for any reason.
Do not replace a fuse with a fuse of a different rating. Do not use a jumper wire to replace a fuse. Do not insert
your hands, tools or any other item into the air intake or air outlet at either the indoor or outdoor unit.
Do not allow children to operate the system.

Model Number Identifi cation

V CF A 012 S 4 - 1 P

Brand/Family

V = Variable Refrigerant Flow (VRF)

Unit Type

CF = Ceiling/Floor-Mount Non-Ducted Indoor Models

Major Design Sequence

A = 1st Generation

Nominal Cooling Capacity - Btuh

012 = 12,000 Btuh
015 = 15,000 Btuh
018 = 18,000 Btuh
024 = 24,000 Btuh
030 = 30,000 Btuh
036 = 36,000 Btuh
048 = 48,000 Btuh
054 = 54,000 Btuh

System Piping

CAUTION

VRF system piping is customized for each installation.
The 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 fi gures
stated within the report, it is imperative that prior to the
commencement of the refrigerant pipe work installation,
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.

Failure to provide this information regarding changes
to the original design may lead to insuffi cient capacity,
equipment failure, warranty being made void and the
refusal to commission the system.

Voltage

P = 208/230V-1 phase-60hz

Minor Design Sequence

1 = 1st Revision
2 = 2nd Revision
3 = 3rd Revision

Refrigerant Type

4 = R-410A

Cooling Effi ciency

S = Standard Effi ciency

2

Dimensions

VCFA012S4, VCFA015S4, VCFA018S4, VCFA024S4

MOUNTING

HOLES (4)

26

(660)

7-7/8
(200)

VCFA030S4

MOUNTING

HOLES (4)

7-1/8
(181)

5-1/4
(134)

3-7/8

(97)

LIQUID

PIPE

3-7/8

2-1/2

GAS
PIPE

(98)

(64)

1-5/8 (41)

1-3/8 (35)

8-1/8 (207)

35-3/4 (908)

39 (991)

REAR VIEW

BOTTOM VIEW

DRAIN OUTLET

(Rear)

15-3/4 (401)14-5/8 (371)

DRAIN

OUTLET

(Either Side)

8-1/8
(206)

SIDE VIEW

26

(660)

7-7/8
(200)

7-1/8

5-1/4

(181)

(134)

1-1/2 (38)

3-7/8

(98)

2-1/2

3-7/8

(64)

(97)

LIQUID

PIPE

GAS
PIPE

NOTE - Fresh Air intake not available on VHIA030 and smaller units.

1-5/8 (41)

8-1/8 (207)

47 (1195)

50-3/8 (1280)

REAR VIEW

BOTTOM VIEW

3

21-1/2 (547)20-1/4 (515)

DRAIN OUTLET

(Rear)

DRAIN

OUTLET

(Either Side)

8-1/8
(206)

SIDE VIEW

VCFA036S4, VCFA048S4

MOUNTING

HOLES (4)

26-3/4

(679)

10

12-7/8

(255)

(185)

DRAIN

OUTLET

(Either Side)

5-3/4
(146)

4-1/2
(116)

GAS
PIPE

VCFA054S4

HANGING

BRACKETS (4)

26-3/4

(680)

4-1/2
(113)

LIQUID

PIPE

8-5/8
(220)

2-3/4 (70)

60-3/4 (1543)

65-3/4 (1670)

REAR VIEW

BOTTOM VIEW

42-1/8 (1070)

28-1/2 (725)24-7/8 (631)

FRESH AIR INTAKE

4 (105) dia.

9-5/8
(244)

SIDE VIEW

15

(381)

6-3/4
(172)

2-5/8 (67)

5

(127)

6-1/8

4-7/8

(157)

(124)

11-1/4

(285)

LIQUID

LINE

SUCTION

LINE

DRAIN OUTLET

65-1/2 (1613)

65-3/4 (1670)

REAR VIEW

BOTTOM VIEW

4

11-1/4

(285)

SIDE VIEW

FRESH AIR INTAKE

4 (105) dia.

Clearances

CEILING APPLICA TIONS

3/4”
(19)

WALL

1”

(25.4)

SIDE VIEW

DROP CEILING

SUPPLY

AIR

CEILING AND FLOOR APPLICATIONS

WALL WALL

24

(610)

FRONT VIEW

24”

(610)

FLOOR APPLICA TIONS

Unit Flush with Wall

SUPPLY

AIR

1”

(25.4)

5

(Service Clearance

SIDE VIEW

24”

(610)

Front of Unit)

FLOOR

Unit Placement

In addition to clearances, the following items should be
considered:

!

WARNING

Use the provided and specifi ed components when
installing equipment. Failure to do so may result in
unit falling, water leaking or electrical shocks, caus­ing personal injury or equipment or property dam age.
Check stability of wall, fl oor, or ceiling and unit
support. If sup port is not capable of carrying weight
of the unit, unit may fall causing personal injury or
equipment damage.
Consider the possibility of earthquakes in your
area when installing the equipment. If the unit is not
correctly secured, it may fall, causing personal injury
or equipment damage.
Safely dispose of packing materials, which include
nails, wood and other sharp objects, as well as plastic
wrapping. Children playing with plastic wrap or bags
risk the danger of suffocation.

!

CAUTION

Do not place items which may be damaged by water
under or around the indoor unit.
The unit should be installed at least 8 feet above the
fl oor (if possible) to ensure maximum performance
and comfort, when installed in the horizontal position
only.

AVOID

Do not install the unit in the following locations:

• Areas exposed to petrochemicals or petrochemical
products

• Areas exposed to salt or other corrosive materials or
caustic gasses

• Areas exposed to extreme voltage variations (such as
factories

• Tightly enclosed areas that may impede service of the
unit

• Areas exposed to fossil fuels (such as oil or gas in
kitchens)

• Areas exposed to strong electromagnetic forces

• Areas exposed to acids or alkaline detergents (laundry
rooms)

DO:

• Locate the unit so that it is not exposed to direct sunlight

• Locate the indoor unit so that the room can be uniformly
cooled. Install unit as high as possible on the ceiling
(8 feet above fl oor, if possible) for best performance
(horizontal installation only).

• Ensure the structural wall, fl oor, or ceiling can support
the weight of the unit.

• Select a location where condensate line will have the
shortest run to a suitable drain per local codes.

• Allow suffi cient space around unit for proper operation
and maintenance

• Install unit a minimum of 3 feet away from any antenna,
power cord (line) radio, telephone, security system, or
intercom. Electrical interference and radio frequencies
from any of these sources may affect operation

• Be sure to instruct customers how to properly
operate the unit (especially maintenance of air fi lter,
and operation procedure) by having them carry out
operations themselves while looking at the manual
provided with the controller.

Installation

Floor/Wall Applications

1. Locate a suitable position within the space where
maintenance access and supply air will not be restricted
or affected by obstacles. The minimum clearances are
given on page 5.

Front View

Refrigerant/Drain
pipe connections

Figure 1. Floor/Wall Applications

2. Locate the VCFA on a wall which is both capable of
supporting the unit’s weight and which is constructed to
enable the unit to fi t fl ush on the wall. An uneven wall
may lead to vibration and subsequent unit damage.

3. Use suitable fasteners to secure the two mounting
brackets to the wall. See fi gures 2 and 3, and the
dimension drawings on pages 3, 4 and 5 to ensure
proper positioning of the brackets.

Mounting

bracket

Fasteners

Figure 2. Mounting Brackets

6

A

CONCRETE CEILING

USING ANCHORS

Anchor

Threaded rod

B

Model A B

VCFA012-024 19-7/8” (505 mm) 19-7/8” (506 mm)

VCFA030 31-1/4” (795 mm) 19-7/8” (506 mm)

VCFA036-048 42-1/8” (1070 mm) 17-3/4” (450 mm)

VCFA054 42-1/8” (1070 mm) 15” (380 mm)

Figure 3. Mounting Bracket Positioning

4. The unit should be installed high enough for a gravity
drain to function properly. If necessary, a fi eld provided
external pump can be installed at the unit. See fi gure 1
for pipe connection locations.

5. Upon confi rming the two brackets are level, correctly
spaced and secured to the wall; lift the unit onto the
brackets. Confi rm the unit is level before continuing.

Ceiling Installation

1. Remove the side panel and the grille. See fi gure 4.

NOTE - Do not remove the grille on VCFA048 or 054
models.

*Do Not
remove grille
on VCFA048
or 054 units

Angle iron bolted in

place across wooden

joists

Threaded rod

ANGLE IRON

ACROSS

WOODEN JOISTS

Wooden joist

Figure 5. Locate Threaded Rods

4. Install suspension rods in the structural
ceiling or concrete slab in a suitable location.
If the structural ceiling is constructed of concrete, install
anchors to accept four suitably sized threaded rods to
suspend the indoor unit. If the structural ceiling includes
wooden joists, use angle iron or Unistrut channel fi xed

securely in place to accept the threaded rods. NOTE -

Threaded rod (requirement of Lennox warranty program)
is the ONLY acceptable method of suspending the unit;
do not use chains or straps. See fi gure 5.

5. Slide one nut and one washer onto each threaded rod.
Use electrical tape to keep the washer from falling off.
Position the nuts slightly above the fi nal resting place of
the suspension brackets.

Threaded rod

Field-provided
isolation grommet

Washer

Suspension

bracket

Grille*

Figure 4. Remove Side Panel and Grille

2. Install four factory-provided mounting bolts by screwing
them into the provided threaded holes in the unit body.
See fi gure 7 for mounting bolt installation locations. The
bolts should only extend from the body a distance which
enables the bracket to engage the bolts and secure the
unit.

3. Make sure that the structural ceiling is able to support
the weight of the unit. It may be necessary to add
support.

Side panel

Leveling nut

Figure 6. Locate Suspension Bracket on Threaded Rod

6. VCFA012-048 units: Afi x the two long suspension

brackets provided in accessory package to the
previously installed threaded rods. See fi gure 6.

VCFA054 units: Afi x the four short suspension

brackets to the unit body. See fi gure 7.
Install the VCFA054 unit directly onto the threaded rods
as instructed in step 8 and then proceed to step 6. Step
9 will not apply to VCFA054 installation.

7. Slide a washer and then a nut onto each rod below
each suspension bracket. Use the leveling nut (beneath
suspension brackets) to adjust the bracket to the correct
height. Remove the electrical tape holding the upper
washers and nuts in place and tighten each of the four
nuts above the brackets down onto the brackets. This
will ensure that the unit remains level. See fi gure 6.

7

8. If necessary, install a fi eld-provided isolation grommet to
prevent transmission of vibration from unit to structural
ceiling.

9. Use either a mechanical lifting device or a minimum of
two people to raise the unit.

10. Hang the unit on the suspension brackets by sliding the
unit backwards on the bracket.

11. Securely tighten the mounting bolts on both sides. See
fi gure 7.

Threaded rods

Suspension

bracket

(provided)

Mounting bolts

VCFA012-048

Suspension brackets (provided)

and

Mounting bolts

VCFA054

0.3”-0.5”

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 a licensed professional HVAC technician (or
equivalent) to repair the leak.
Use only R410A refrigerant to charge this system. Use of other
refrigerant or gas will damage the equipment.
Do not allow air or other contaminants to enter system during
installation of refrigerant piping. Contaminants will result in
lower system capacity and abnormally high operating pressures
and may result in system failure or explosion.
Insulate all refrigerant piping.
Refrigerant pipes may be very hot during unit operation. Do not
allow contact between wiring and bare copper pipes.
After refrigerant piping connections have been completed,
check the system for leaks per commissioning instructions.

Field piping consists of two copper lines connected to the
indoor unit. Table 1 lists the connection sizes at the indoor
unit. The connections are made using the provided brass
fl are nuts at the end of the refrigerant piping connections.

Both lines must be individually insulated.

1. The seal on the unit refrigerant piping connections
should remain in place until the last possible moment.
This will prevent dust or water from getting into the
refrigerant piping before it is connected.

2. CAREFULLY adjust refrigerant piping connections to
suit the application.

3. Slowly loosen one of the fl are nuts to release the factory
nitrogen charge.

4. Remove the fl are nuts from the connections on the unit
and discard the seal from each of the piping connections.

5. Slide the fl are nuts onto the ends of the fi eld-provided
refrigerant piping before using a suitable fl aring tool to
fl are the end of the copper pipe.

6. Apply recommended HFC-410A refrigerant lubricant to
the outside of the fl ared refrigerant lines (fi gure 8-A).

Figure 7. Suspend Unit

Mounting bolt

(max. 1.6”)

8

IMPORTANT!

The compressor in this unit contains PVE
oil (Polyvinylether). PVE oil is formulated for
hydrofl uorocarbon (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.

7. Align the threaded connections with the fl ared refrigerant
lines. Tighten the fl are nuts lightly at fi rst to obtain a
smooth match (fi gure 8-B).

8. Once snug, continue another half-turn on each nut
which should create a leak-free joint. A torque wrench
may be used to tighten fl are nuts using table 2

recommendations. See fi gure 7. Do not over-tighten

a fl ared joint. Flared connections should always
be accessible and must be insulated to prevent
condensation.

IMPORTANT!

Always use two wrenches when tightening fl are
nuts to avoid twisting refrigerant piping. DO
NOT over-tighten fl are nuts.

TORQUE WRENCH

Table 1. Refrigerant Piping Connections

Size

Liquid Line Vapor Line

(Btuh)

VCFA012 & 015 1/4” 1/2”

VCFA018 - 054 3/8” 5/8”

A

CANT ON THE OUTSIDE OF

THE FLARE

MALE FLARE

CONNECTION

B

Figure 8. Making Connections at Indoor Unit

(Male to Female Connection)

TO INDOOR

UNIT

TO OUTDOOR UNIT

BACKUP

WRENCH

Figure 9. Tighten Flare Nut

Table 2. Flare Nut Torque Recommendations

Outside

Diameter

Inches U.S.

1/4” 15 ft.-lb. 1/4 turn

3/8” 26 ft.-lb. 1/2 turn

1/2” 41 ft.-lb. 7/8 turn

5/8” 48 ft.-lb. 1 full turn

Recommended

Torque

No torque wrench

available

Finger tighten and

use an appropriately

sized wrench to turn an

additional:

9. After refrigerant piping has been installed and checked
for leaks, apply insulation over all fl ared connections.

9

Condensate Piping Connections

!

CAUTION

Make sure that drain piping is properly routed
and insulated in order to prevent both leaks and
condensation.

1. Make a water-tight connection between the fi eld-
provided condensate drain line and the fl exible
condensate connector (5/8” I.D.).

2. Confi rm proper slope (not less than 1/4 inch per foot)
and routing of condensate lines to ensure moisture is
drained away from the indoor unit.

3. Drain should be as short as possible and should not
have any droops or kinks that would restrict condensate
fl ow and shall be approved resistant pipe. There must
be a 2-inch space between the end of the condensate
drain and the fi nal termination point (ground, open
drain, 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 fi eld-provided condensate pump
has been installed, it must be checked to ensure proper
operation. This check is part of the commissioning
sequence.

IMPORTANT!

Drain should have a slope of at least ¼ inch per foot
and should be approved corrosion-resistant pipe.
Y ou must confi rm operation of every drain and pump
in the system as part of the commissioning proce­dure.

3 ft. (1 m)

VCFA

SUPPORT

STRAPS

Slope at least

1/4” per foot

Figure 10. Single Indoor Unit Suspended from Ceiling

Using a Properly Sloped Gravity Drain

DRAIN LINE

3 ft. (1 m)

VCFA VCFA VCFA

SUPPORT

STRAPS

INDIVIDUAL DRAIN OUTLET FROM EACH INDOOR UNIT

MAIN DRAIN

(Sloped at 1/4” per foot AWAY from unit and should

be supported as needed to prevent sagging.)

Figure 11. Condensate Drain Multiple Indoor Units Suspended from Ceiling Using a Single Properly Sloped

Gravity Drain

Using an External Water Level Switch

Disconnect the closed circuit loop, CN 5. Connect the
water level switch cable accessory to CN 5. See unit wiring
diagrams for location of CN 5.

The connection has 5 VDC current, do not supply fi eld
voltage.

10

Wiring Connections

!

WARNING

Isolate the power supply before accessing unit
electrical terminals.
Install unit so that unit disconnect is accessible.
Follow all local and national codes, as well as this
installation instruction, during installation. Do NOT
overload electrical circuit, as this may lead to failure
and possible fi re.
Use specifi ed wiring and cable to make electrical
connections. Clamp cables securely and make sure
that connections are tight to avoid strain on wiring.
Insecure wiring connections may result in equipment
failure and risk of fi re.
Wiring must be installed so that all cover plates can
be securely closed.

!

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 not connect power wires to the outdoor unit until
all other wiring and piping connections have been
completed.
Install all wiring at least 3 feet away from televisions,
radios or other electronic devices in order to avoid
the possibility of interference with the unit operation.
Do not install the unit near a lighting appliance that
includes a ballast. The ballast may affect remote
control operation.

!

CAUTION

A disconnection device having an air gap contact
separation in all active conductors should be
incorporated in the fi xed wiring according to the
National Wiring Regulation.

In the U.S.A., wiring must conform with current local codes
and the current National Electric Code (NEC). In Canada,
wiring must conform with current local codes and the current
Canadian Electrical Code (CEC). Refer to unit nameplate
for minimum circuit ampacity and maximum overcurrent
protection size.

NOTE - Three-conductor shielded cable must be used for
the communication wiring. This is necessary to ensure
proper system communication and operation.

• A circuit breaker capable of shutting down the power
supply to the entire system must be installed.

• A single switch can be used to supply power to units on
the same system. However, branch switches and circuit
breakers must be selected carefully.

• Fit the power supply wiring of each unit with a switch
and fuse as shown in the wiring diagram.

• Install a wiring interrupter or ground-fault circuit
interrupter for the power wiring.

• Make sure the ground resistance is no greater than
100Ω. This value can be as high as 500Ω when using
a grounding fault circuit interrupter since the protective
ground resistance can be applied.

1. Pull the return air fi lter grille forward and remove the
fi lters.

2. Remove one screw from each safety strap assembly
(one on each side) and remove return air grille.

3. Locate the control box in the center of the unit, below
and behind the fan motor.

4. Remove the two screws holding the control box onto the
motor mounting bracket, and the screw at each end of
the control box holding securing the box to the chassis
of the unit. Lower the control box to obtain access to
cover.

5. Remove the screws securing the cover and remove
cover from control box.

6. Locate the terminal strip in the control box. Connect the
power wiring (sized per NEC/CEC and local codes)
and communications cable (three-conductor shielded
cable) per fi gures 12 and 13. Refer to unit nameplate
for rated voltage.

7. If the indoor unit is the fi nal unit in a group that is wired
in series, install the provided resistor across terminals P
and Q. See fi gure 14.

Tightening torque for the terminal screws

• Use the correct screwdriver for fi ghting the terminal
screws. If the screwdriver blade is too small, the head
of the screw might be damaged, and the screw will not
be properly tightened.

• If the terminal screws are over tightened, screws might
be damaged.

• Refer to the table below for the tightening torque of the
terminal screws.

Table 3. Terminal Screw Tightening Torque

Tightening torque (lb-ft)

Terminal base of

0.58-0.72
remote controller/Signal
transmission wire (X2M)

Terminal base of power

0.87-1.06
supply (X1M)

Grounding terminal (M4) 1.06-1.43

• After wiring, confi rm all connections are correct; Then
turn on power supply to the unit.

11

Indoor units and MS boxes on the same refrigeration
circuit should have a common power supply but must
have an independent disconnect switch installed adjacent

to the fan coil for servicing and maintenance purposes.
Indoor unit and MS box power supply MUST not be taken
from the outdoor unit. Always follow NEC/CEC and Local
Codes.

Power DistribuƟon Box

L1/L2

L1/L2

Box

L1/L2

MS

L1/L2/L3

PQE

PQE

PQE

PQE

PQE

PQE

L1/L2/L3

L1/L2/L3

L1/L2

L1/L2

PQE

L1/L2

L1/L2

L1/L2

L1/L2

PQE

MS

PQE

L1/L2

Box

L1/L2

PQE

L1/L2

PQE

Legend

PQE CommunicaƟon wiring

L1/L2 Single-Phase power wiring

L1/L2/L3 Three-Phase power wiring

Electrical disconnect switch

Figure 12. Typical Power Wiring Diagram (VRF Heat Recovery System Shown)

12

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)

13

KEY

FM1,FM2

EEV

T2B

XP1-5
XS1-5

CAP1 CAP2



XT1-2

GMA,GMB

127(

COMPONENT

EXPANSION VALVE

T1

INLETAIR TEMP.

EVAPOUTLETTEMP

IN COOLING MODE

T2

FAN CAPACITOR

TR
CS

LEVEL SWITCH

TERMINAL BLOCK

GM

LEVEL SWING MOTOR

SWING MOTOR



INDOOR FAN

ELECTRONIC

COILTEMP.

PLUG
JACK

TRANSFORMER

WATER

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<(//2:*5((1<(//2:*5 ((1 <(//2:*5 ((1

GROUND

21

6:

&1

:+,7(

&1

:+,7(

*0%

)$1&$3

- 21

6:

GROUND

&1 <(//2:

32:(5B6

(1&

&1

((9

&1

&1

&1

&1

&1

;3

;6

&21752/ ,17(5)$&(
02'8/(



;3

;6

%/$&.

;3

;6

:+,7(

;6

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:,5(' &21752//(5

;7

&211(&7 72
:,5(' &21752 //(5

127(  5()(5 72 0$18$/ )25

•• •

&20081,&$7,21 :,5,1 *

 3/($ 6( 86( 7+(

&21'8&725
6+,(/'(' &$%/(

:,5('
&21752//( 5

•••••••

&211(&7 72
287'225 81,7

(9$3 287/(7 7(03

CS

LEVEL SWING MOTOR

GM

COMPONENT

INDOO RFA N

ELECTRONIC

EXPANSIONVAL VE

INLETAIRTEMP.

IN COOLING MODE

COILTEMP.

PLUG

JACK
FAN CAPACITOR
TRANSFORMER

WATER

LEVELSWITCH

TERMINAL BLOCK

VERTICAL

SWING MOTOR

KEY

)0)0

EEV

T1

T2B

T2
XP1-11
XS1-11

CAP1
CAP2

TR

XT1-2

GMA,GMB

127(
&20321(17 ,1 '$6+
/,1( ,6 237,21$/
25 ),(/' :,5,1*

208/230V-1 PHASE-60-hz

75

L2

L1

;7

POWER IN

Figure 14. VCFA012-48S4-1 Wiring Diagram

21

6:

&1

21

6:

*0$

5('

%/8(

<*

GROUND

)0$

&1

21

6:

0$,1 &21752/ %2$5'

&1

)0%

&1

&1

<*

*0

GROUND

&1

<*

GROUND

&1

&1

&1: +,7(

*0%

-

&1

((9

&1<(/ /2:

21

6:

&1

:+,7(

7

;6;3

32:(5B6

(1&

%/$&.

7

',63/$< 3$1(/

&1

&1

&1

&1

127(  5()(5 72 0$18$/ )25

7%

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&21752// (5

&21752/ ,17(5)$&(
02'8/(

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XY

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6+,(/' (' &$%/(

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:,5(' &21752//(5

(E)

PQ

&211(&7 72
287'225 81,7

:,5('
&21752//( 5

(E)

Figure 15. VCFA054S4-1 Wiring Diagram

14

KEY

FM1,FM2

EEV

T1

T2B

T2
XP1-5
XS1-5

CAP1 CAP2

TR

CS

XT1-2

GM

GMA,GMB

COMPONENT

INDOOR FAN
ELECTRONIC

EXPANSIONVALVE

INLETAIR TEMP.

EVAPOUTLET TEMP

IN COOLING MODE

COIL TEMP.

PLUG
JACK

FAN CAPACITOR

TRANSFORMER

WATER

LEVEL SWITCH

TERMINAL BLOCK

LEVEL SWING MOTOR

VERTICAL

SWING MOTOR

CN30

GND

CAP1

GROUND

GROUND

KEY

EEV

T1

T2B

T2
XP1-11
XS1-11

CAP1
CAP2

TR

CS

XT1-2

GM

GMA,GMB

COMPONENT

INDOOR FAN
ELECTRONIC

EXPANSIONVALVE

INLETAIR TEMP.

IN COOLING MODE

COIL TEMP.

PLUG

JACK

FAN CAPACITOR

TRANSFORMER

WATER

LEVEL SWITCH

TERMINAL BLOCK

LEVEL SWING MOTOR

VERTICAL

SWING MOTOR

GROUND

AUXH

FAN CTON H TON

HHEinterface

Currentrange (0~1A)

Voltagerange (0~AC/DC24V)

Figure 16. VCFA012-48S4-2 Wiring Diagram

CN30
GND

HHE interface

AUXH

FAN CTON HTO N

Current range (0~1A)

Voltagerange (0~AC/DC24V)

L2

L1

GROUND

GROUND

GROUND

Figure 17. VCFA054S4-2 Wiring Diagram

15

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 lters. Failure to follow this step will
deteriorate the indoor unit coil and cause condensate
issues.

Outside
Air
Knockout

Duct
Screw
Holes (4)

Figure 18. Typical Outside Air Knockout

1. Knock out the outside air supply opening. See fi gure

18.

2. Remove any insulation.

3. Connect the outside air duct to cassette body using
the four screw holes shown in fi gure 18.

4. Relocate the indoor unit’s return air sensor to either
the controller (electronically) or physically by using the
remote sensor accessory.

5. The outside air supply duct length must be 10 feet or
less.

6. Flexible duct connection must be used to avoid
vibration noise being transmitted into the building.

7. Use a fi eld-supplied booster fan to increase static
pressure.

16