Lennox ADNOVA THX 045 Assembly instructions

www.lennoxemea.com

INSTALLATION, OPERATING

AND MAINTENANCE

WALL MOUNTED PACKAGED

INDOOR UNIT

@DNOVA

THX

4 - 15 kW ADNOVA-THX_R410A-

IOM-1506-E

@DNOVA THX_R410A-IOM-1506-E 1

1General Description 2

1.1 Structure 2

1.2 Field of application 2

1.3 Cooling circuit 3

1.4 Installation warnings 4

2Inspection / Transport / Positioning 5

2.1 Inspection on receipt 5

2.2 Lifting and Transport 5

2.3 Unpacking 5

2.4 Positioning 5

3 Installation 10

4Evacuation and Charging Operations 10

4.1 Introduction 10

4.2 Vacuum and charging machine 10

4.3 Evacuating a circuit “contaminated” with refrigerant 11

4.4 Charging positions (single point) 11

5Electrical Connections 12

5.1 Generalities 12

6Machine Functional Schemes 13

7Starting Up 14

7.1 Preliminary checks 14

7.2 Starting up instructions (for THX/D packaged air---conditioning units) 14

8Setting Operating Parameters 17

8.1 Generalities 17

8.2 Maximum pressure switch 17

8.3 Minimum pressure switch 17

9Maintenance 18

9.1 Warnings 18

9.2 Generalities 18

9.3 General inspection 19

9.4 Inspecting the air filter (THX) 19

9.5 Inspecting the air filter (THXD) 20

9.6 Inspecting the damper/motor (THXD) 20

9.7 Inspecting the damper/motor (THX) 22

9.8 Fixing of cables 22

9.9 Inspection of the compressor section 23

9.10 Inspection the sight glass and the filter drier 23

9.11 Repairing the cooling circuit 24

9.12 Tightness test 24

9.13 Hard vacuum and drying of cooling circuit 24

9.14 Recharging with refrigerant R410A 25

9.15 Environmental protection 25

10 Troubleshooting 26

11 Dimensional drawing 27

@DNOVA THX_R410A-IOM-1506-E 2

1 GENERAL DESCRIPTION

THX/D “Lennox Wall-mounted Telecom units” are air conditioners for low- and medium-powered telephone

exchanges. They are designed to be mounted on an outside wall of the shelter.THX air conditioners are

direct expansion package units with an air-cooled condenser system. They are distinguished by an

innovative air circulation system which significantly enhances performance in all operating conditions.

1.1 Structure

All THX/D units have a galvanised sheet steel supporting base, coated with epoxy polyester powder paint

oven cured at 180°C, and enclosing panels made of aluminium and magnesium alloy 5005 (Peraluman) or,

on request, painted galvanised sheet steel (RALxxxx). The unit features an exclusive design which,

combined with a rational layout of components and extremely compact dimensions, lends it an attractive

appearance.

1.2 Field of application

THX/D units are to be used within the operating limits stated in this manual; failure to comply with said

limits will invalidate the warranties provided in the contract of sale (see Tab. 1)

Tab. 1 Operating limits

Modello

THX

045

THXD

045

THX

056

THXD

056

THX

073

THXD

073

THX

090

THXD

090

THX

105

THXD

105

THX

120

THXD

120

THX

145

THXD

145

THX

230

THX 290

Alimentazione

elettrica

230Vac 10%

24Vdc 16% / 48Vdc 16% 400Vac 10% / 3Ph + N /

50Hz

24Vdc 16% / 48Vdc 16%

Condizioni

ambientali

esterne min. - 20 °C

Condizioni

ambientali

esterne max. 48,0 °C 46,5 °C 45,0 °C 47,0 °C 45,0 °C 46,0 °C 48,0 °C

48,0 °C

46,0 °C

Condizioni

ambientali

interne min. /

Umidità

19 °C / 30 % U.R.

Condizioni

ambientali

interne max. /

Umidità

35 °C / 50 % U.R.

Condizioni di

immagazzinamento -10 °C / 90 % U.R.

+55 °C / 90 % U.R.

@DNOVA THX_R410A-IOM-1506-E 3

1.3 Cooling circuit

The entire cooling circuit is built in the Lennox factory using only components of the finest quality brands

and processes conforming to the specifications of Directive 97/23 for brazing and testing.

Compressors: only scroll-type compressors of leading international manufacturers are used in the THX

units. Today scroll compressors represent the best solution in terms of reliability, efficiency and MTBF.

Cooling components:

oMolecular mesh activated-alumina filter dryer

oFlow indicator with humidity indicator. Indications are provided directly on the sight glass.

oThermostatic valve with external equalization and integrated MOP function.

oHigh and low pressure switches

oSchrader valves for checks and/or maintenance

Electric control board: The electric control board is constructed and wired in accordance with Directives

73/23/EEC and 89/336/EEC and related standards. The board may be accessed through a door after

the main switch has been put off. All the remote controls use 24 V signals powered by an insulating

transformer situated on the electric control board. NOTE: the mechanical safety devices such as the

high pressure switch are of the kind that trigger directly; their efficiency will not be affected by any faults

occurring in the microprocessor control circuit, in compliance with 97/23 PED.

Control microprocessor: the microprocessor built into the unit allows the different operating parameters

to be controlled from a set of pushbuttons situated on the electric control board;

oSwitching on/off of compressor to maintain the temperature set point T inside the shelter

oAlarm management

High / low pressure

Dirty filters alarm

Air flow alarm

oAlarm signalling

oDisplay of operating parameters

oRS232, RS485 serial output management (optional)

oPhase sequence error [Not displayed by the mP, but prevents the compressor from starting up]

[see microprocessor control manual for further details, also in relation to particular customer

specifications]

@DNOVA THX_R410A-IOM-1506-E 4

Fig. 1 Basic cooling circuit

Compressor

Condenser

Thermostatic valve

Evaporator

Filter dryer

Sight glass

Low pressure switch

High pressure switch

9 Condensing pressure

probe

1.4 Installation warnings

General rules

•When installing or servicing the unit, you must strictly follow the rules provided in this manual, comply with

the directions on the units themselves and take all such precautions as are necessary.

•The fluids under pressure in the cooling circuit and the presence of electrical components may cause

hazardous situations during installation and maintenance work.

All work on the unit must be carried out by qualified personnel only, trained to do

their job in accordance with current laws and regulations

•Failure to comply with the rules provided in this manual or any modification made to the unit without prior

authorisation will result in the immediate invalidation of the warranty.

Warning: Before performing any kind of work on the unit, make sure it has been

disconnected from the power supply.

@DNOVA THX_R410A-IOM-1506-E 5

2 Inspection / Transport / Positioning

2.1 Inspection on receipt

On receiving the unit, check that it is perfectly intact: the unit left the factory in perfect conditions;

immediately report any signs of damage to the carrier and note them on the Delivery Slip before signing

it.Lennox or its Agent must be promptly notified of the entity of the damage. The Customer must submit a

written report describing every significant sign of damage.

2.2 Lifting and Transport

While the unit is being unloaded and positioned, utmost care must be taken to avoid abrupt or violent

manoeuvres. The unit must be handled carefully and gently; avoid using machine components as

anchorages or holds and always keep it in an upright position. The unit should be lifted using the pallet it is

packed on; a transpallet or similar conveyance means should be used

Warning: In all lifting operations make sure that the unit is securely anchored in order to

prevent accidental falls or overturning.

2.3 Unpacking

The packing must be carefully removed to avoid the risk of damaging the unit. Different packing materials

are used: wood, cardboard, nylon etc. It is recommended to keep them separately and deliver them to

suitable waste disposal or recycling facilities in order to minimise their environmental impact.

2.4 Positioning

Bear in mind the following aspects when choosing the best site for installing the unit and the relative

connections:

•positioning and dimensions of the coupling flanges;

•location of power supply;

•solidity of the supporting wall;

It is recommended to first prepare holes in the wall for passing through the power cables, for the air intake

and outlet flanges and for the screw anchors that will secure the unit on the wall.

The dimensions of the air outlet/intake flanges and the positions of the holes for the screw anchors and

power cables are shown Fig. 2:

@DNOVA THX_R410A-IOM-1506-E 6

Fig. 2 Wall mounted unit

THX0230-290

@DNOVA THX_R410A-IOM-1506-E 7

@DNOVA THX_R410A-IOM-1506-E 8

3 Installation

The THX/D package air-conditioning unit is suitable for all environments except aggressive ones. Do not

place any obstacles near the units and make sure that the air flow is not impeded by obstacles and/or

situations causing back suction (see Fig.3).

Fig. 3 Service Area

A (mm)

B (mm)

C (mm)

D (mm)

Min. 400

Min. 200

Min. 400

Min. 2000

The following steps should be carried out to ensure proper installation (see Fig. 4):

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