Lennox AUD24AH2/A-D(U) User manual

Installation Instructions
Original Instructions
Air Conditioners
Air Handlers
Models:
AUD24AH2/A-D(U)
AUD36AH2/A-D(U)
AUD48AH2/A-D(U)
AUD60AH2/A-D(U)

To Users
(1) 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.
(2) In order to ensure reliability of product, the product may consume some power
under stand-by status for maintaining normal communication of system and
preheating refrigerant and lubricant. If the product is not to be used for long, cut off
the power supply; please energize and preheat the unit in advance before reusing
it.
(3) Please properly select the model according to actual using environment;
otherwise it may impact the using convenience.
(4) This product has gone through strict inspection and operational test before leaving
the factory. In order to avoid damage due to improper disassembly and inspection,
which may impact the normal operation of unit, please do not disassemble the unit
by yourself. You can contact with the special maintenance center of our company
if necessary.
(5) When the product is faulted and cannot be operated, please contact with our
maintenance center as soon as possible by providing the following information.
1)Contents of nameplate of product (model, cooling/heating capacity, product No.,
ex-factory date).
2)Malfunction status (specify the situations before and after the error occurs).
(6) All the illustrations and information in the instruction manual are only for reference.
In order to make the product better, we will continuously conduct improvement
and innovation. We have the right to make necessary revision to the product from
time to time due to the reason of sales or production, and reserve the right to
revise the contents without further notice.
Thank you for selecting AC PRO’s product. Please read this instruction manual
carefully before installing and using the product, so as to master and correctly use the
product. In order to guide you to correctly install and use our product and achieve
expected operating effect, we hereby instruct as below:

(7) If the supply cord is damaged, it must be replaced by the manufacturer, its service
agent or similarly qualified persons in order to avoid a hazard.
Exception Clauses
Manufacturer will bear no responsibilities when personal injury or property loss is
caused by the following reasons:
(1) Damage the product due to improper use or misuse of the product.
(2) Alter, change, maintain or use the product with other equipment without abiding by
the instruction manual of manufacturer.
(3) After verification, the defect of product is directly caused by corrosive gas.
(4) After verification, defects are due to improper operation during transportation of
product.
(5) Operate, repair, maintain the unit without abiding by instruction manual or related
regulations.
(6) After verification, the problem or dispute is caused by the quality specification or
performance of parts and components that produced by other manufacturers.
(7) The damage is caused by natural calamities, bad using environment or force
majeure.
(8) AC PRO assumes no responsibility for personal
injury, property loss or equipment damage caused by improper installation and
commissioning, unnecessary maintenance, or not following relevant national rules
and regulations, industrial standards and requirements in this instruction manual.
(9) The final right to interpret for this instruction manual belongs to AC PRO.

Contents
1 Safety Precautions ............................................................ 1
2 Product Introduction ......................................................... 2
2.1 Product Description................................................................2
2.2 Optional Accessories..............................................................2
2.3 Physical Dimension................................................................3
2.4 Names of Main Parts..............................................................4
2.5 General Information ...............................................................4
2.6 Dip switch configuration .........................................................5
2.7 Fan Performance Data ........................................................6
3 Preparative for Installation................................................ 7
3.1 Pre-Installation Instruction......................................................7
3.2 Important Safety Instructions..................................................8
4 Installation........................................................................ 10
4.1 Unit Inspection .....................................................................10
4.2 Location ...............................................................................10
4.3 Piping Work..........................................................................11
4.4 Condensate Removal...........................................................13
4.5 Ductwork..............................................................................14
4.6 Electric Heater .....................................................................14
4.7 Electrical Installation ............................................................16
5 Installation Check and Trial Run .................................... 21
5.1 Checking Items after Installation ..........................................21
5.2 Trial Run ..............................................................................22
6 Common Malfunction and Elimination .......................... 23
7 Maintenance and Care..................................................... 25
7.1 Drain Pipe ............................................................................25

7.2 Notice before Seasonal Use.................................................25
7.3 Maintenance after Seasonal Use .........................................25
7.4 Parts Replacement...............................................................25
8 After-Sales Service .......................................................... 25
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.

Air Handlers
1
1 Safety Precautions
This product can’t be installed at corrosive, inflammable or explosive environment
or the place with special requirements, such as kitchen. Otherwise, it will affect the
normal operation or shorten the service life of the unit, or even cause fire hazard or
serious injury. As for above special places, please adopt special air conditioner with
anti-corrosive or anti-explosion function.
Improper installation, adjustment, alteration, service, maintenance, or use can
cause explosion, fire, electrical shock, or other conditions which may cause death,
personal injury, or property damage. Consult a qualified installer, service agency, or
your distributor or branch for information or assistance. The qualified installer or agency
must use factory--authorized kits or accessories when modifying this product. Refer to
the individual instructions packaged with the kits or accessories when installing. Follow
all safety codes. Wear safety glasses, protective clothing, and work gloves. Use
quenching cloth for brazing operations. Have fire extinguisher available. Read these
instructions thoroughly and follow all warnings or cautions included in literature and
attached to the unit. Consult local building codes and National Electrical Code (NEC)
for special requirements. Recognize safety information. This is the safety--alert
symbol .
When you see this symbol on the unit and in instructions or manuals, be alert to the
potential for personal injury. Understand these signal words: DANGER, WARNING,
CAUTION and NOTICE. These words are used with the safety--alert symbol.
Indicates a hazardous situation that, if not avoided, will result in
death or serious injury.
Indicates a hazardous situation that, if not avoided, could result
in death or serious injury.
Indicates a hazardous situation that, if not avoided, may result
in minor or moderate injury.
Indicates important but not hazard-related information, used to
indicate risk of property damage.

Air Handlers
2
Electrical shock hazard:
Failure to follow this warning could result in personal injury or death.
Before installing, modifying, or servicing system, main electrical disconnect switch
must be in the OFF position. There may be more than 1 disconnect switch. Lock out
and tag switch with a suitable warning label.
2 Product Introduction
2.1 Product Description
2.2 Optional Accessories
Indoor unit accessories
No.
Name
Appearance
Q'ty
Usage
1 3/8 CPC 1
Copper Pipe
Connector
Liquid Line
2 3/4 CPC 1
Copper Pipe
Connector Gas
Line
The AC PRO air handler offer the perfect combination of superior product quality,
operating efficiency, operating sound levels and value for money. The condensing unit
uses the environmentally friendly refrigerant R410A, which is chlorine-free to help
prevent damage to the ozone layer.

Air Handlers
3
2.3 Physical Dimension
Unit: inch
Model
Dimension
W
D
H
A
B
$UD24AH2/A-D(U)
AUD36AH2/A-D(U) 21-1/4 21-1/4 48-1/4 11-5/8 20
AUD48AH2/A-D(U)
AUD60AH2/A-D(U) 24-3/4 21-1/4 57 11-5/8 20
Clearance
Side and back 0”
Front 24” for servicing.

Air Handlers
4
2.4 Names of Main Parts
2.5 General Information
Model
Cooling capacity(ton)
Optional electric heater (kW)
AUD24AH2/A-D(U)
2.0
5/8/10
AUD36AH2/A-D(U)
3.0
5/8/10
AUD48AH2/A-D(U)
4.0
10/15/20
AUD60AH2/A-D(U)
5.0
10/15/20
Model Motor @ 230V ~, 60Hz
HP
FLA
AUD24AH2/A-D(U)
AUD36AH2/A-D(U) 1/2 2.1
AUD48AH2/A-D(U)
AUD60AH2/A-D(U) 1 3.2
Unit: inch
Model
Filter size
AUD24AH2/A-D(U)
AUD36AH2/A-D(U) 19.29×20.31×.59
AUD48AH2/A-D(U)
AUD60AH2/A-D(U) 20.6×20.31×.59