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Air to Air Heat Exchanger with DX Coil Unit
Original instruction
Please read this Installation Manual carefully before installing the Air to Air Heat Exchanger with DX Coil Unit.
• This Manual describes the installation method of the Air to Air Heat Exchanger with DX Coil Unit.
• For installation of the outdoor unit, follow the Installation Manual attached to the outdoor unit.
ADOPTION OF NEW REFRIGERANT
This Air Conditioner is a new type which adopts a new refrigerant HFC (R410A) instead of the conventional
refrigerant R22 in order to prevent destruction of the ozone layer.
Contents
1 Precautions for safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2 Accessory parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Restrictions on system construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Selection of installation place . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5 Installation of indoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6 Drain piping work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7 Water supply piping for a humidifier (VNK type only). . . . . . . . . . . . . . . . . . . . . . . . 8
8 Installation of ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
9 Refrigerant piping and vacuuming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
10 Electric wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
11 System configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
12 Advanced system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
13 Advanced control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
14 Fan characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
15 Test run . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
16 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
17 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
1-EN
Installation Manual
Air to Air Heat Exchanger with DX Coil Unit
- 1 -
Thank you for purchasing this Toshiba Air to Air Heat Exchanger with DX Coil Unit
This Installation Manual describes the installation method of the Air to Air Heat Exchanger with DX Coil Unit. For installation of
outdoor units, follow the Installation Manual supplied with the outdoor unit.
Moreover, as this installation manual includes the important articles concerning the "Machinery" Directive (Directive 2006/42/
EC), please read through the manual and make sure you understand it. After installation, give this Installation Manual, the
Owner's Manual and the Installation Manual supplied with the outdoor unit to the customer and tell the customer to keep them
safe.
Prepare an exclusive power source for indoor units, independent to that for outdoor units.
Y-shaped branching joints or a branching header (separately purchased) are required for connecting pipes between indoor and
outdoor units. Choose either of them considering the system capacity concerning piping. For installing branching pipes, refer to
the installation manual of the Y-shaped branching unit or branching header (separately purchased).
Outdoor connecting branching joints are required for connecting between outdoor units.
Generic Denomination: Air conditioner (Air to Air Heat Exchanger with DX Coil Unit)
Definition of Qualified Installer or Qualified Service Person
The Air to Air Heat Exchanger with DX Coil Unit must be installed, maintained, repaired and removed by a qualified installer or
qualified service person. When any of these jobs is to be done, ask a qualified installer or qualified service person to do them
for you.
A qualified installer or qualified service person is an agent who has the qualifications and knowledge described in the table
below.
Agent
Qualified installer
Qualified service
person
Definition of Protective Gear
When the Air to Air Heat Exchanger with DX Coil Unit is to be transported, installed, maintained, repaired or removed, wear
protective gloves and 'safety' work clothing.
In addition to such normal protective gear, wear the protective gear described below when undertaking the special work detailed
in the table below.
Failure to wear the proper protective gear is dangerous because you will be more susceptible to injury, burns, electric shocks
and other injuries.
Qualifications and knowledge which the agent must have
• The qualified installer is a person who installs, maintains, relocates and removes the Air to Air Heat Exchanger with
DX Coil Units made by Toshiba Carrier Corporation. He or she has been trained to install, maintain, relocate and
remove the Air to Air Heat Exchanger with DX Coil Units made by Toshiba Carrier Corporation or, alternatively, he
or she has been instructed in such operations by an individual or individuals who have been trained and is thus
thoroughly acquainted with the knowledge related to these operations.
• The qualified installer who is allowed to do the electrical work involved in installation, relocation and removal has
the qualifications pertaining to this electrical work as stipulated by the local laws and regulations, and he or she is
a person who has been trained in matters relating to electrical work on the Air to Air Heat Exchanger with DX Coil
Units made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such matters by an
individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge related to
this work.
• The qualified installer who is allowed to do the refrigerant handling and piping work involved in installation,
relocation and removal has the qualifications pertaining to this refrigerant handling and piping work as stipulated
by the local laws and regulations, and he or she is a person who has been trained in matters relating to refrigerant
handling and piping work on the Air to Air Heat Exchanger with DX Coil Units made by Toshiba Carrier Corporation
or, alternatively, he or she has been instructed in such matters by an individual or individuals who have been
trained and is thus thoroughly acquainted with the knowledge related to this work.
• The qualified installer who is allowed to work at heights has been trained in matters relating to working at heights
with the Air to Air Heat Exchanger with DX Coil Units made by Toshiba Carrier Corporation or, alternatively, he or
she has been instructed in such matters by an individual or individuals who have been trained and is thus
thoroughly acquainted with the knowledge related to this work.
• The qualified service person is a person who installs, repairs, maintains, relocates and removes the Air to Air Heat
Exchanger with DX Coil Units made by Toshiba Carrier Corporation. He or she has been trained to install, repair,
maintain, relocate and remove the Air to Air Heat Exchanger with DX Coil Units made by Toshiba Carrier
Corporation or, alternatively, he or she has been instructed in such operations by an individual or individuals who
have been trained and is thus thoroughly acquainted with the knowledge related to these operations.
• The qualified service person who is allowed to do the electrical work involved in installation, repair, relocation and
removal has the qualifications pertaining to this electrical work as stipulated by the local laws and regulations, and
he or she is a person who has been trained in matters relating to electrical work on the Air to Air Heat Exchanger
with DX Coil Units made by Toshiba Carrier Corporation or, alternatively, he or she has been instructed in such
matters by an individual or individuals who have been trained and is thus thoroughly acquainted with the knowledge
related to this work.
• The qualified service person who is allowed to do the refrigerant handling and piping work involved in installation,
repair, relocation and removal has the qualifications pertaining to this refrigerant handling and piping work as
stipulated by the local laws and regulations, and he or she is a person who has been trained in matters relating to
refrigerant handling and piping work on the Air to Air Heat Exchanger with DX Coil Units made by Toshiba Carrier
Corporation or, alternatively, he or she has been instructed in such matters by an individual or individuals who have
been trained and is thus thoroughly acquainted with the knowledge related to this work.
• The qualified service person who is allowed to work at heights has been trained in matters relating to working at
heights with the Air to Air Heat Exchanger with DX Coil Units made by Toshiba Carrier Corporation or, alternatively,
he or she has been instructed in such matters by an individual or individuals who have been trained and is thus
thoroughly acquainted with the knowledge related to this work.
Installation Manual
2-EN
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