Lennox VWMA007S4, VWMA009S4, VWMA012S4, VWMA015S4, VWMA018S4 Installation Instructions Manual

©2015 Lennox Industries Inc.

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.

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.

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

Dallas, T exas, USA

!

WARNING

!

CAUTION

INSTALLATION
INSTRUCTION

VWMA Wall-Mounted Units

VRF SYSTEMS -- Indoor Units
507462-02
10/2015

IMPORTANT!

The Clean Air Act of 1990 bans the intentional
venting of refrigerant (CFCs, HCFCs and HFCs)
as of July 1, 1992. Approved methods of recovery,
recycling or reclaiming must be followed. Fines and/
or incarceration may be levied for noncompliance.
These units must be installed as a part of a matched
system as specifi ed in the Product Specifi cations
(EHB) bulletin.

General

The VWMA wall-mounted 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.

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 or national codes in any way.
Authorities having jurisdiction should be consulted 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 2 contains the following:
1 - Assembled indoor unit with mounting bracket
8 - Mounting bracket securing screws
8 - Plastic screw anchors
1 - Roll tape
1 - Flexible condensate drain pipe
1 - Wall sleeve
1 - Plastic cover for wall sleeve
1 - Resistor
1 - Brass fl are nut
1 - Installation manual

Not for use with V0CTRL90 Auxiliary Heat Relay.
See Service and Application Note VRF-15-01.

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 WM A 012 S 4 - 1 P

Brand/Family

V = Variable Refrigerant Flow (VRF)

WM = Wall Mounted Non-Ducted Indoor Models

Major Design Sequence

Nominal Cooling Capacity - Btuh

Unit Type

A = 1st Generation

007 = 7000 Btuh

009 = 9000 Btuh
012 = 12,000 Btuh
015 = 15,000 Btuh
018 = 18,000 Btuh
024 = 24,000 Btuh
030 = 30,000 Btuh

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

Unit Dimensions - inches (mm)

VWMA007S4, VWMA009S4, VWMA012S4, VWMA015S4, VWMA018S4

4-1/2
(114)

D

TOP VIEW

B

SIDE VIEW

Size

C
A

FRONT VIEW

ABCD

in. mm in. mm in. mm in. mm

3-1/4

(83)

9 (229)

SIDE VIEW

007, 009, 012 36 914 11-3/8 289 28-7/8 733 27-1/4 692

015, 018 42-1/4 1073 12-3/8 314 35-1/8 892 33-1/8 841

VWMA024S4, VWMA030S4

SIDE VIEW

TOP VIEW

44-5/8 (1133)
49-1/4 (1251)

FRONT VIEW

12-3/4

(324)

9-3/4 (248)

SIDE VIEW

3

Clearances

WALL

Vertical Clearance - Clearance to Ceiling - 6 inches (152 mm) Minimum

5

(127)

Minimum

FRONT VIEW

Vertical Clearance - Clearance to Floor - 72 inches (1829 mm) Minimum
NOTE - Provide 96 inches (2438) clearance to floor for best performance

WALL

5

(127)

Minimum

Indoor Unit Placement

!

WARNING

Do not install the unit in an area where fl ammable
materials are present due to risk of explosion
resulting in serious injury or death.

If the basis underneath the unit is not strong enough
to support the weight of the unit, the unit could be fall
out of place and cause serious injury.

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
damage. Check stability of wall-mounted unit
support. If support 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.

AVOID

Do not install the unit in the following locations:

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

• Areas exposed to extreme voltage variations (such as
factories)

• Tightly enclosed areas that may impede service of the

• unit.

• 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 wall (8
feet above fl oor, if possible) for best performance.

• Select a wall location that 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 (fi lter must able to be removed from
the top-front of the unit).

• Install the indoor 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.

4

DETERMINING WALL MOUNTING PLATE LOCATION

1. Remove the wall mounting plate from the back of the
indoor unit.

Left piping

Left back piping

Right back piping

Right piping

Figure 1. Determining Exit Locations

2. Determine the best exit location for utility bundle (line
set, condensate line and wiring).

3. Position the wall mounting plate on the wall so that,
when installed, the unit will be at least 6 inches (152
mm) from the ceiling and 5 inches (127 mm) from the
wall on either side. The wall mounting plate must be
level side-to-side.

4. Use the wall mounting plate as a template to determine
the exit point for utility bundle. Mark the wall to facilitate
drilling hole for utility bundle.

Installation

WALL MOUNTING PLATE INSTALLATION
Install the wall mounting plate so that it is correctly positioned

horizontally and vertically. The indoor unit must be installed
level on the wall to allow proper condensate drainage.

1. Use a carpenter's level or measuring tape to verify the
wall mounting plate is horizontally level.

2. Secure the wall mounting plate to the wall using the
provided screws and screw anchors. NOTE - It is
important to use all screws provided to secure the wall
mounting plate to the wall. Additional holes may be
drilled through the metal wall mounting plate to better
secure wall plate. Field-provided anchors/fi xings may
be required depending on wall construction. Use the
appropriate type of anchors for the application.

3. The wall mounting plate must be installed fl ush against
the wall so that the indoor unit will be fl ush after
installation. Any space between the wall and unit will
cause noise and vibration.

4. The wall mounting plate must be installed horizontally
level on the wall.

VWMA007S4, VWMA009S4 and VMWA012S4 Units

Wall Mounting Bracket

Outline of Indoor Unit

VWMA015S4 and VWMA018S4 Units

Wall Mounting Bracket

Outline of Indoor Unit

VWMA024S4 and VWMA030S4 Units

Wall Mounting Bracket

Outline of Indoor Unit

Figure 2. Wall Mounting Brackets

5

WALL SLEEVE INSTALLATION

The utility bundle may be routed out of the back of the unit
or out either side. If the bundle is to be routed out the back
through an external wall, use a fi eld-provided wall sleeve to
protect the utility bundle. NOTE - If the utility bundle will be

routed out the side of the indoor unit and up the wall above
a false ceiling, continue to the next section.

1. Prior to making the hole and installing the wall sleeve
for the utility bundle, check to ensure that there are no
other utilities located in the wall behind the hole location.

!

WARNING

Electric Shock Hazard. Can cause injury or death.
Avoid location where electric wiring or conduits may
be present inside the wall.

2. Cut a hole in the wall using a suitable hole saw. Hole
should be at a slight downward slant - 3/16” to 3/8”
toward the outdoor side.

INSIDE

OUTSIDE

Typical

installation

procedure

shown.

Figure 3. Boring Hole for Wall Sleeve

INSTALL UNIT ON WALL MOUNTING PLATE

1. A length of fi eld-provided fl exible condensate piping
should be connected to the drain prior to securing the
unit to the wall mounting plate.

2. If the factory-provided refrigerant piping connections
and fi eld-provided fl exible condensate piping are long
enough to enable fi nal fi eld connections after unit is
installed on wall mounting plate, use fi eld-provided tape
to bundle them together.

3. The utility bundle may be routed out of the back of the
unit or out either side. If the bundle is to be routed
out the back through an external wall, feed the utility
bundle through the wall sleeve. If the utility bundle is
to be routed out of the side of the indoor unit and up
an inside wall, carefully form the utility bundle so that it
makes a gentle 90° turn.

4. Align the back of the indoor unit with the hooks at the
top of the wall mounting plate. Move the unit from side
to side to make sure that it settles securely.

5. The bottom of the unit can be lifted to facilitate refrigerant
piping and condensate drain connections, if necessary.
See fi gure 6.

HOOKS AT TOP

OF MOUNTING

BRACKET

TEMPORARY

SPACER

(To facilitate

connections)

3. Measure the thickness of the wall from the inside edge
to the outside edge and cut the fi eld-provided wall
sleeve at a slight angle 1/4” (6 mm) shorter than the
thickness of the wall.

USE SUITABLE TOOL TO CUT PVC FOR WALL

SLEEVE AT SLIGHT ANGLE AS SHOWN.

Figure 4. Cutting PVC for Wall Sleeve

4. Place the provided plastic cover over the end of the
pipe that will be visible from the inside wall and insert
the pipe in the wall.

NOTE - When passing bundled services through an exterior
brick or concrete wall, protect the copper pipes and wiring
from the effects of these construction materials by using a
sleeve made of a suitable material. The integrity of copper
pipe and wiring can deteriorate when exposed to these
construction materials

Figure 6. Secure Unit to Wall Mounting Plate

6

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 of f 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 (straight back, right or left).

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 7-A).

Table 1. Refrigerant Piping Connections

Size

(Btuh)

7000
12000
15000
18000
24000
30000
36000
48000

A

Liquid Line

in.

1/4 1/2

3/8 5/8

CANT ON THE OUTSIDE OF

Vapor Line

THE FLARE

MALE FLARE

CONNECTION

in.

B

Figure 7. Making Connections

(Male to Female Connection)

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 7-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 4. Do not over-tighten

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

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

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.

IMPORTANT!

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

TORQUE WRENCH

TO INDOOR

UNIT

TO OUTDOOR UNIT

Figure 8. Tighten Flare Nut

7

BACKUP

WRENCH

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:

IMPORTANT!

Flared connections should always be accessi­ble and must be insulated to prevent condensa­tion. See fi gure 9.

INSULATE ALL FLARED CONNECTIONS

TO PREVENT CONDENSATION

1. Make a water-tight connection between the fi eld-
provided condensate drain line and the fl exible
condensate connector.

2. See fi gure 10 for applications including a single unit
and a single drain. In this case, ensure that the drain
line is properly sloped (no less than 1/4 inch per foot)
and condensate lines are routed 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 system installation is complete, the condensate
drain line must be checked for leaks. This check is
part of the commissioning sequence. 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.

UNIT
BASE

Figure 9. Insulate Flared Connections

Condensate Piping Connections

!

CAUTION

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

IMPORTANT!

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

3 ft. (1 m)

SUPPORT

STRAPS

DRAIN LINE

Figure 10. Condensate Drain Piping

8

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.

1. Lift indoor unit front panel to access the control box
over. Remove the screw(s) securing the cover. Remove
the plate.

2. 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). Refer to unit nameplate for rated voltage.

3. 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.

4. Remove spacer. Secure bottom of unit to wall mounting
bracket. Continue with installation of outdoor unit and
system commissioning.

POWER WIRING

COMMUNICATIONS

WIRING

CONTROL BOX

COVER

Figure 11. Accessing Control Box

Network Address and Commissioning

After the system has been installed, each indoor unit must
be assigned an address as part of the commissioning
procedure.

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.

9

TR

CN2

(RED)

ANION

CN21

Y/G

GROUND

WHITE(GRAY)

C

WHITE

CN20

(BLUE)

FM

CN4

(WHITE)

Y/G

GROUND

ON

EEV

CN15

GM GM

CN5

DISPLAY BOARD

CN1 CN2

WIRED

CONTROLLER

HEAT

DM

XP2

XS2

RED

BLUE

XT1

L1

L2

INDOOR UNIT POWER

208-230V

CN3

(WHITE)

CN7

(WHITE)

CN24

(WHITE)

CN1
(BLUE)

Z

SW6 ENC1

POWER_S

MAIN CONTROL BOARD

HEAT_LHEAT_N

SW1

SW2

CN10 WHITE

ONONON

SW5

J1J2

(WHITE)

CN19

CN14

YELLOW

CN13

YELLOW

CN17

(WHITE)

CN16

(RED)

CN9

CN8

XS1XP1

XY

REMOTE
ON / OFF

WEEKLY TIMER

(E)

P

TROLLER

Q(E)

XT2

Y/G

Y/G

GROUND

T1

WHITE

T1

BLACK

CONNECT TO

WIRED CONTROLLER

T2B

T2

CONNECT TO

OUTDOOR

UNIT

KEY

FM

EEV

EXPANSION VALVE
INLET AIR TEMP.

T1

EVAP OUTLET TEMP.

T2B

(COOLING MODE)

T2
XP1-7
XS1-

7

TR

XT1-2

TERMINAL BLOCK

WATER LEVEL SWITCH

CS

C

GM

DM

AUXILIARY HEATER

HEAT

ANION

ANION GENERATOR

Typical wiring diagram. Refer to wiring diagram on the unit for actual wiring.

Figure 12. Typical VWMA007 to 018 Wiring Diagram

COMPONENT

INDOOR FAN
ELECTRONIC

COIL TEMP.

PLUG
JACK

TRANSFORMER

FAN CAPACITORFAN CAPACITOR

SWING MOTOR

PUMP MOTOR

NOTE - Dashed line indicates optional or field­wired components.

NOTE - If indoor unit is the final unit in a group
wired in series, install provided resistor across
terminals P and Q.

NOTE - Use 3-conductor, shielded cable for
communication wiring.

10

DM

WHITE(GRAY)

C

WHITE

FM

REMOTE
ON / OFF

ON/OFF

DISPLAY BOARD

CN1 CN2

Y/G

EEV

XS5
XP5

GROUND

XS1
XP1

ON

SW6

ENC1

POWER_S

GM GM

CN5

CN14

COMON/OFF

XP8
XS8

BLACK

T2B

CN9

(YELLOW)

XP6

XP7
XS7

XS6

WHITE

T2

T1

CN8

XP3
XS3

WIRED

CONTROLLER

XP4
XS4

TR

RED

BLUE

Z

XT1

L2

L1

INDOOR UNIT POWER

208-230V

CN15

EEV

CN10 WHITE

(WHITE)

(RED)

XP1

XS1

WEEKLY TIMER

TROLLER

MAIN CONTROL BOARD

(RED)

(BLUE)

CN1

Y/G

Y/G

GROUND

CN24

(WHITE)

(YELLOW)

CN6

AL

(BLUE)

(WHITE)

ON

SW2 SW5

ONON

XT2

J1J2

CONNECT TO

WIRED CONTROLLER

(E)

PQXY

CONNECT TO

OUTDOOR

UNIT

HEAT_LHEAT_N

XS2

XP2

CN3

(WHITE)

ON

SW1

KEY

FM

EEV

EXPANSION VALVE

INLET AIR TEMP.

T1

EVAP OUTLET TEMP.

T2B

(COOLING MODE)

T2

XP1-7

7

XS1-

TRANSFORMER

TR

XT1-2

TERMINAL BLOCK

WATER LEVEL SWITCH

CS

C

FAN CAPACITORFAN CAPACITOR

GM
DM

AUXILIARY HEATER

HEAT

AL

Typical wiring diagram. Refer to wiring diagram on the unit for actual wiring.

Figure 13. Typical VWMA024 to 030 Wiring Diagram

COMPONENT

INDOOR FAN
ELECTRONIC

COIL TEMP.

PLUG
JACK

SWING MOTOR

PUMP MOTOR

ALARM

NOTE - Dashed line indicates optional or field­wired components.

NOTE - If indoor unit is the final unit in a group
wired in series, install provided resistor across
terminals P and Q.

NOTE - Use 3-conductor, shielded cable for
communication wiring.

11

Outdoor unit

(main unit)

Outdoor unit

(sub1 unit)

Outdoor unit

(sub2 unit)

(H1 H2 E)

(PQE)

(H1 H2 E) (H1 H2 E)

(PQE)

Ground cable shield

DO NOT connect to E

(PQE)

MS

Box

(PQE)

MS

Box

(PQE)

P Q

Install a terminating resistor at the last indoor unit terminals P and Q of the daisy
chain and for each individual unit when connected directly to an MS Box port.

All shields of shielded cable connect to GROUND terminal,

not to terminal E.

18 GA., stranded, 3-conductor, shielded control wire (polarity sensitive).

Typical Wiring Diagram, NEC/CEC and Local Codes apply.

NOTE - Each communication wire from the MS box should follow the refrigerant piping for that port.

Figure 14. Typical Communication Wiring Diagram (VRF Heat Recovery System)

12