Lennox VESD007N432U User manual

VESD007N432U
VESD008N432U
VESD009N432U
VESD011N432U
VESD012N432U
VESD013N432U
VESD015N432U
VESD017N432U
VESD019N432U
VESD021N432U
VESD024N432U
VRF Iutdoor Units
Installation Manual
Slim Fan Coil
Thank you for selecting LENNOX air conditioners. Please read this manual carefully before operation
and keep it for further reference.
Ducted

Preface
For correct installation and operation, please read all instructions carefully. Before reading the
instructions, please be aware of the following items:
1) Execution standard of VRF: ISO 15042-2011.
2) For the safe operation of this unit, please read and follow the instructions carefully.
3) During operation, total capacity of indoor units should not exceed the total capacity of
outdoor units. Otherwise, indoor units will not provide enough cooling or heating.
4) Direct operators or maintainers should well keep this manual.
5) If this unit fails to operate normally, please contact our service center as soon as possible
and provide the following information:
◆Content on the nameplate (model number, cooling capacity, production code, ex-factory
date).
◆Malfunction details (before and after the malfunction occurs).
6) Each unit has been strictly tested and proved to be qualified before ex-factory. In order to
prevent units from being damaged or operating normally because of improper
disassembly, please do not disassemble the unit by yourself. If you need to disassemble
and check units, please contact our service center. We will send specialists to guide the
disassembly.
7) All graphics in this manual are only for your reference. For sales or production reasons,
these graphics are subject to change by manufacturer without prior notice.
8) Under the standby status, the unit will consume a little power for ensuring reliability of
complete unit, maintaining normal communication and preheating refrigerant. When the
unit won’t be used for a long time, cut off the power of the complete unit. However, please
preheat it when operating the unit next time.
9) This appliance can be used by children aged from 8 years and above and persons with
reduced physical, sensory or mental capabilities or lack of experience and knowledge if
they have been given supervision or instruction
concerning use of the appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision.
Correct Disposal of this product
This marking indicates that this product should not be disposed with other
household wastes throughout the EU. To prevent possible harm to the
environment or human health from uncontrolled waste disposal, recycle it
responsibly to promote the sustainable reuse of material resources. To return your
used device, please use the return and collection systems or contact the retailer
where the product was purchased. They can take this product for environmental
safe recycling.
R410A(R32/125:50/50):2087.5

Contents
1 Safety Precautions .................................................................................................................... 1
2 Product Introduction ....................................................................................................................3
2.1 Names of Key Components...............................................................................................3
2.2 Rated Working Condition...................................................................................................3
2.3 Unit Functions ...................................................................................................................3
3 Preparations for Installation.........................................................................................................3
3.1 Standard Fittings................................................................................................................3
3.2 Location for Installation......................................................................................................4
3.3 Requirements for Communication Line .............................................................................5
3.4 Wiring Requirements.........................................................................................................5
4 Installation Instructions................................................................................................................6
4.1 Installation of Indoor Unit...................................................................................................6
4.2 Pipe Connection................................................................................................................9
4.3 Installation and Test of Drain Pipe.....................................................................................9
4.4 Installation ofAir Duct......................................................................................................12
4.5 Installation of Wired Controller.........................................................................................15
5 Wire Connection...................................................................................................................... 15
5.1 Connection of Wire and Wiring Board Terminal...............................................................15
5.2 Power Cord Connection ..................................................................................................16
5.3 Connection of Communication Line of IDU and ODU......................................................17
5.4 Connection of Communication Line of Wired Controller..................................................17
5.5 Instructions on Connecting Wired Controller and IDU Network.......................................18
6 General Maintenance ................................................................................................................20
6.1 Cleaning of Air Filter........................................................................................................20
6.2 Maintenance Before Use-season ....................................................................................20
6.3 Maintenance After Use-season .......................................................................................20
7 Malfunction Codes of IDU..........................................................................................................20
8 Troubleshooting.........................................................................................................................21

Slim Fan Coil Indoor Unit
1
1 Safety Precautions
Means items that must be forbidden! Otherwise, it may lead to personal injury or death or serious
damage.
Means items that must be followed! Otherwise, it may lead to personal injury or property loss.
Follow this instruction to
complete the installation
work. Please carefully read
this manual before unit
startup and service.
Installation should be
conducted by dealer or
qualified personnel. Please
do not attempt to install the
unit by yourself. Improper
handling may result in water
leakage, electric shock or fire
disaster etc.
Before installation, please
check if the power supply is
in accordance with the
requirements specified on
the nameplate. And also take
care of the power safety.
Make sure the unit can be
earthed properly and soundly
after plugging into the socket
so as to avoid electric shock.
Please do not connect the
ground wire to gas pipe, water
pipe, lightning rod or
telephone line.
Be sure to use the exclusive
accessory and part to
prevent the water leakage,
electric shock and fire
accidents.
Frefrigerant leakage happens
during installation, please
ventilate immediately.
Poisonous gas will emerge if
the refrigerant gas meets fire.
Wire size of power cord
should be large enough.The
damaged power cord and
connection wire should be
replaced by exclusive cable.
After connecting the power
cord, please fix the electric
box cover properly in order to
avoid accident.
Never fail to comply with the
nitrigen charge
requirements.Charge
nitrogen when welding pipes.
Never short-circiut or cancel
the pressure switch to prevent
unit damage.
Please firstly connect the
wired controller before
energization, otherwise
wired controller can not be
used.
Before using the unit, please
check if the piping and wiring
are correct to avoid water
leakage, refrigerant leakage,
electric shock, or fire etc.

Slim Fan Coil Indoor Unit
2
Do not insert fingers or
objects into air outlet/inlet
grille.
Open the door and window
and keep good ventilation in
the room to avoid oxygen
deficit when the gas/oil
supplied heating equipment is
used.
Never start up or shut off the
air conditioner by means of
directly plug or unplug the
power cord.
Turn off the unit after it runs at
least five minutes; otherwise it
will influence oil return of the
compressor.
Do not allow children operate
this unit.
Do not operate this unit with
wet hands.
Turn off the unit or cut off
the power supply before
cleaning the unit, otherwise
electric shock or injury may
happen.
Never spray or flush water
towards unit, otherwise
malfunction or electric shock
may happen.
Do not expose the unit to the
moist or corrosive
circumstances.
Electrify the unit 8 hours
before operation. Please
switch on for 8 hours before
operation. Do not cut off the
power when 24 hours
short-time halting (to protect
the compressor).
Volatile liquid, such as
diluent or gas will damage
the unit appearance.Only
use soft cloth with a little
neutral detergent to clean
the outer casing of unit.
Under cooling mode, please
don't set the room
temperature too low and keep
the temperature difference
between indoor and outdoor
unit within 5.
I f anything abnormal
happens (such as burning
smell), please power off the
unit and cut off the main
power supply, and then
immerdiately contact
LENNOX appointed service
center.If abnormality keeps
going, the unit might be
damaged and lead to
electric shock or fire.
User is not allowed to repair
the unit. Fault service may
cause electric shock or fire
accidents. Please contact
LENNOX appointed service
center for help.

Slim Fan Coil Indoor Unit
3
2 Product Introduction
2.1 Names of Key Components
NO. ①②③④⑤
Name Drain Pipe Electric box Hooker Air Outlet Air-return Opening
2.2 Rated Working Condition
Indoor Side Condition Outdoor Side Condition
Dry Bulb Temp °C Wet Bulb Temp °C Dry Bulb Temp °C Wet Bulb Temp °C
Rated Cooling 27 19 35 24
Rated Heating 20 15 7 6
2.3 Unit Functions
Unit Functions Wired Controller VEWCL1B
Operation Mode(Cooling, Heating, Fan, Dehumidifying) √
Fan Speed Adjustment √
Temperature Adjustment √
X-fan Function √
Quiet Function √
Sleep Function √
Save Function √
E-heater Function ×
Memory Function √
Absence Function √
Timer Function √
Low Temp Dehumidify Function √
Filter Cleaning Reminding Function √
I Feel ｘ
Light Function √
Swing √
Notes:
①√: included, ｘ: not included.
②Please refer to the user manual of Wired Controller or Remote Controller for function details.
3 Preparations for Installation
Note: Product graphics are only for reference. Please refer to actual products. Unspecified measure
unit is mm.
3.1 Standard Fittings
Please use the supplied standard fittings listed below as instructed.

Slim Fan Coil Indoor Unit
4
No. Name Graphics Quantity Purpose
1 wire controller package (including wire
controller, emergency bottom case,
instruction manual, screws, packing box) 1set Control indoor unit
2 Remote controller 0 or 1 optional parts (including
#7 batteries)
3 Sponge for drainage pipe 2 wrap water pipe and
rubber cork for
condenser
4 Insulating materials 2 used for the joint of gas
pipe and liquid pipe for
indoor unit
5 Corrugated pipe 0 or 1 Diameter of air
pipe≥15.9
6 Union nut 1 or 2 one for the model with
corrugated pipe; two for
other models
7 Spring washer M8, nut M8, nut with
washer M8, washer M8 4 Used for hanging the
indoor unit
8 Tieline 6 Wrap the sponge at the
connection position
9 others
User Manual: 1 copy
Loosen-leaf of Instruction Manual : 1 copy (harmful substance content table)
Qualified Certificate: 1 copy
Bar Code : 1 copy
3.2 Location for Installation
1) The top holder must be strong enough to support unit's weight.
2) Drain pipe can drain water out easily.
3) There is no obstacle at inlet or outlet. Please ensure good air circulation.
4) In order to make sure the space for maintenance, please install the indoor unit according to the
dimension described below.
5) Keep the unit away from heating source, inflammable gas or smoke.
6) This is a concealed ceiling type unit.
7) Indoor unit, outdoor unit, power cord and electric wire should stay at least 1m from the TV set and
radio. Otherwise, these electrical appliances may have image interference and noise. (Even if the
distance is 1m, when there is strong electric wave, noise may still occur.)
8) The appliance shall not be installed in the laundry. Unit: mm
Fig 3.1