Airwell CVOA-025N-01M22 2-Way Cassette Type Indoor Unit User Manual

Airwell CVOA-025N-01M22 2-Way Cassette Type Indoor Unit User Manual

CVOA-025N-01M22
CVOA-035N-01M22
22.AW.CVOA.025-050.R410A.SM.EN.12.13.Rev01
CVOA-040/050-01M22

IMPORTANT NOTE:
Read this manual carefully before installing or operating your new air conditioning unit. Make sure to save this manual for future reference

1. 2-Way Cassette Type Indoor Unit
1.1 Features

CVOA-025N-01M22
CVOA-035N-01M22
CVOA-040/050-01M22

Compact design: only 220mm height

Ceiling antifouling design
Unique antifouling design

Two way air flow
Quite operation
5 models ranging from 2.2kW to 5.6kW

1.2 Specification

1.3 Dimension

1.4 Piping diagram

1.5 Wiring diagram

1.6 Electric characteristics

Symbols:
MCA: Min. circuit amps (A)
MFA: Max. fuse amps of circuit breaker
Output: Fan motor rated output (w)
FLA: Full load amps (A)

Note:

1. Voltage range
   The units are applicable for the electrical systems where voltage supplied to unit is in the range.

2. Maximum allowable voltage unbalance between phases is 2%.

3. MCA=1.25FLA MFA≤4FLA

4. Power supply uses the circuit breaker.

1.7 Air velocity and temperature distribution

a. Cooling / Air velocity distribution

Cooling
Blowy angle: 40
Air Velocity distribution

b. Cooling / Temperature distribution

Cooling
Blowy angle: 40
Temperature distribution

c. Heating / Air velocity distribution

Heating
Blowy angle: 70
Air velocity distribution

d. Heating / Temperature distribution

Heating
Blowy angle: 70
Temperature distribution

1.8 Sound pressure level

1.9 Installation
1.9.1 Installation procedures
Before installation
Make correct operation according to the manual when installation. Please confirm the below information:

• If operation plan has been discussed
• Model, power supply specs
• Pipe, wire, and the other parts
• Accessories (inside the unit, take it out after opening the filter)

Selection of installation location for the indoor unit
Indoor units should be installed in places with the environment of even circulation of cool and warm blows. The following places should be avoided.

• Places with high salinity (beach), high sulfureted gas (such as the thermal spring regions where copper tubes and soft soldering are easy to be eroded), much oil (including mechanical oil) and steam; places where organic substance solvent is used; where special spray is frequently used;
• Places where machines generate the high frequency electromagnetic wave (abnormal condition will appear in the control system);
• Places where there are high humidity exists near the door or windows (dew is easily formed).

WARNING

Protect the machine from gales or earthquake, make the installation according to the regulations. Improper installation will cause accidents due to the overturn of the air conditioner.

Select the following places to install indoor unit

1. The places where cool or warm air can ventilate smoothly. If the place is higher than 3m, the warm air will manifold around the ceiling. A circulator is necessary for this case.
2. The places where the wires and pipes are easy to outdoor.
3. The places where the condensate water can be drained out smoothly and the drainage pipe can lean appropriately.
4. The places where there is no obstacle at air inlet or outlet. And the places which will not alarm or not be in short circuit.
5. The place where the sunshine will not shoot directly.
6. The places around which the frosting temperature is below 28 and the relative humidity is below 80% (when the unit is installed at place with high temperature, pay main attention to frosting issues, for example the unit can be equipped with heat insulation).
   Take it into account that if the place is strong enough to support the unit. If not, please strengthen it with reinforced plate and horizontal plate.

Suspension installation
Suspend the bolt with 4 M10 or W3/8. Fasten the bolt to make every bolt bear the load of 50kg. The suspension bolt should be about 95mm extending outward of ceiling.

When the ceiling exists already

1. Open a hole on the ceiling, and set the dimension appropriate for the installation.
2. Fasten the bolt (purchased locally) on the correct position.
3. After suspending indoor unit, install the template paper on the position of panel with 4 bolts, then adjust the height according to the below procedure. (The length from ceiling to unit bottom is 07-18K: 63mm)
4. Check if the unit is horizontal with a level. If not, the unit will leak water or float switch works badly.
5. Fix the unit after levelness adjustment.

■ Take insulation measures to the following two parts of drainage pipe to avoid leakage.
Drain pipe fitting location:
After drainage test, install small tube shield onto drain pipe fitting and then use bigger tube shield to cover smaller one and part of drainage pipe. And then use bandage to tie them.
Rigid polyvinyl chloride pipe of indoor unit.
■ Do not set air vent in the drain pipe.
■ Exit height of drain pipe should be 750mm higher than ceiling, so if facing any barrier while laying drain pipe, you can use bending pipe or other attachments to avoid, and on this condition, if the drain pipe from unit to pipe is too long, the water flow will increase when air conditioner is off.

Installation of pane

Bolt used should be close to panel

Air supply outlet is easy to be damaged, please pay attention to it when working.

1.9.2 Electrical wiring
WARNING

• Electrical construction should be made with specific mains circuit by the qualified personnel according to the installation instruction. Electric shock and fire may be caused if the capacity of power supply is not sufficient.
• During arranging the wiring layout, specified cables should be used as the mains line, which accords with the local regulations on wiring. Connecting and fastening should be performed reliably to avoid the external force of cables from transmitting to the terminals. Improper connection or fastness may lead to burning or fire accidents.
• There must be the ground connection according to the criterion. Unreliable grounding may cause electrical shocks. Do not connect the grounding line to the gas pipe, water pipe, lightening rod and telephone line.

ATTENTION
Supply Wiring Drawing

• Only copper wire can be used. Breaker for electric leakage should be provided, or electric shock may occur.
• The wiring of the mains line is of Y type. The power plug L should be connected to the live wire and plug N connected to null wire while should be connected to the ground wire. For the type with auxiliary electrically heating function, the live wire and the null wire should not be misconnected, or the surface of electrical heating body will be electrified. If the power line is damaged, replace it by the professional personnel of the manufacturer or service center.
• The power line of indoor units should be arranged according to the installation instruction of indoor units.
• The electrical wiring should be out of contact with the high-temperature sections of tubing as to avoid melting the insulating layer of cables, which may cause accidents.
• After connected to the terminal tier, the tubing should be curved into be a U-type elbow and fastened with the pressing clip.
• Controller wiring and refrigerant tubing can be arranged and fixed together.
• The machine can’t be powered on before electrical operation. Maintenance should be done while the power is shut down.
• Seal the thread hole with heat insulating materials to avoid condensation.
• Signal line and power line are separately independent, which can’t share one line. [Note: the power line and signal line are provided by users. Parameters for power lines are shown as below: 3×1.0-1.5) mm2; parameters for signal line: 2×0.75-1.25)mm2( shielded line)]
• 5 butt lines (1.5mm) are equipped in the machine before delivery, which are used in connection between the valve box and the electrical system of the machine. The detailed connection is displayed in the circuit diagram.

• Indoor units and outdoor units should be connected to the power source separately. Indoor units must share one single electrical source, but its capacity and specifications should be calculated. Indoor & outdoor units should be equipped with the power leakage breaker and the overflow breaker.

Signal Wiring Drawing

Outdoor units are of parallel connection via three lines with polarity. The master unit, central control and all indoor units are of parallel connection via two lines without polarity. The singal line between wired controller and indoor units are polarity

There are three connecting ways between wired controller and indoor units:

Note:
1. Plug the wired controller terminal to the CN22-1 terminal of master unit which wired address is 0, the slave unit only connects BC terminal.
2. Wired address setting

3. One controller can Max. control 8 indoor units.
4. Hand-in-hand connection method
5. The singal line is polarity

The combination of multiple indoor units can be controlled by wired controller or remote controller.
※ Switching mode of Wired control master unit/ Wired control slave unit/ remote control types can be used for switching over ※

※ The electrical power line and signal lines must be fastened tightly.
※ Every indoor unit must have the ground connection.
※ The power line should be enlarged if it exceeds the permissible length.
※ Shielded lays of all the indoor and outdoor units should be connected together, with the shielded lay at the side of signal lines of outdoor units grounded at one point.
※ It is not permissible if the whole length of signal line exceeds 1000m.
Signal wiring of wired controller

※ The shielding lay of the signal line must be grounded at one end.
※ The total length of the signal line shall not be more than 250m.

1.9.3 Test run

Before Test Run

• Before switching it on, test the supply terminal tier (L, N terminals) and grounding points with 500V megaohm meter and check if the resistance is above 1MΩ. It can’t be operated if it is below 1MΩ.
• Connect it to the power supply of outdoor units to energize the heating belt of the compressor. To protect the compressor at startup, power it on 12 hours prior to the operation.
• Check if the arrangements of the drainpipe and connection line are correct.
• The drainpipe shall be placed at the lower part while the connection line placed at the upper part.
• Heat preservation measures should be taken such as winding the drainpipe esp. in the indoor units with heating insulating materials.
• The drain pipe should be made a slope type to avoid protruding at the upper part and concaving at the lower part on the way.
• Checkup of Installation.

Check if the mains voltage is matching
Check if there is air leakage at the piping joints
Check if the connections of mains power and indoor & outdoor units are correct
Check if the serial numbers of terminals are matching

Check if the installation place meets the requirement
Check if there is too much noise
Check if the connecting line is fastened
Check if the connectors for tubing are heat insulated
Check if the water is drained to the outside
Check if the indoor units are positioned

Ways of Test Run

Do ask the installation personnel to make a test run. Take the testing procedures according to the manual and check if the temperature regulator works properly.

When the machine fails to start due to the room temperature, the following procedures can be taken to do the compulsive running. The function is not provided for the type with remote control.

• Set the wired controller to cooling/heating mode, press “ON/ OFF” button for 5 seconds to enter into the compulsive cooling/heating mode. Repress “ON/ OFF” button to quit the compulsive running and stop the operation of the air conditioner.

WARNING :
The design and specifications are subject to change without prior notice for product improvement. Consult with the sales agency or manufacturer for details.

AIRWELL RESIDENTIAL SAS
10,Rue du Fort de Saint Cyr,
78180 Montigny le Bretonneux – France
www.airwell.com

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References

• Airwell - Air Conditioning & Heating Solutions - Just feel well

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