Table of Contents
Advertisement
• Be sure to read this manual thoroughly before installation.
• The warnings and precautions indicated in this manual contain important information per-
taining to your safety. Be sure to observe them.
• Hand this manual, together with the operation manual, to the customer. Request the cus-
tomer to keep them on hand for future use, such as for relocating or repairing the unit.
Request your dealer or a professional installer to install the indoor unit in accordance with
this installation manual.
An improperly installed unit can cause serious accidents such as water leakage, electric
shock, or fire.
If the indoor unit is installed in disregard of the instructions in the installation manual, it will
void the manufacturer's warranty.
Do not turn on the power until all work has been completed.
Turning on the power before the work is completed can cause serious accidents such as
electric shock or fire.
If refrigerant leaks while work is being carried out, ventilate the area.
If the refrigerant comes in contact with a flame, it produces a toxic gas.
Installation must be performed in accordance with the requirement of NEC (National Elec-
trical Code) and CEC (Canadian Electrical Code) by authorized personnel only.
Except for EMERGENCY, never turn off main as well as sub breaker of the indoor units
during operation. It will cause compressor failure as well as water leakage.
First, stop the indoor unit by operating the control unit, converter or external input device
and then cut the breaker. Make sure to operate through the control unit, converter or
external input device.
When the breaker is designed, locate it at a place where the users cannot start and stop in
the daily work.
This product can expose you to chemicals including Lead, lead compounds, and formalde-
hyde, which are known to the State of California to cause cancer and birth defects or other
reproductive harm.
For more information go to www.P65Warnings.ca.gov.
2. ABOUT THIS PRODUCT
2.1. General information
This indoor unit provides the flexibility for installation in any upflow or horizontal flow applica-
tion.
The unit can be positioned for bottom air return in the upflow position or air return through the
end of the unit in the horizontal position.
2.2. Precautions for using R410A refrigerant
Do not introduce any substance other than the prescribed refrigerant into the refrigeration
cycle.
If air enters the refrigeration cycle, the pressure in the refrigeration cycle will become
abnormally high and cause the piping to rupture.
If there is a refrigerant leakage, make sure that it does not exceed the concentration limit.
If a refrigerant leakage exceeds the concentration limit, it can lead to accidents such as
oxygen starvation.
Do not touch refrigerant that has leaked from the refrigerant pipe connections or other
area. Touching the refrigerant directly can cause frostbite.
If a refrigerant leakage occurs during operation, immediately vacate the premises and
thoroughly ventilate the area.
If the refrigerant comes in contact with a flame, it produces a toxic gas.
2.3. Special tools for R410A
To install a unit that uses the R410A refrigerant, use dedicated tools and piping materials
that have been manufactured specifically for R410A use.
Because the pressure of the R410A refrigerant is approximately 1.6 times higher than the
R22, failure to use dedicated piping material or improper installation can cause rupture or
injury.
Furthermore, it can cause serious accidents such as water leakage, electric shock, or fire.
Tool name
Pressure is huge and cannot be measured with a conventional
(R22) gauge. To prevent erroneous mixing of other refrigerants,
the diameter of each port has been changed.
Gauge manifold
It is recommended to use a gauge manifold with a high pressure
display range 500 micron to 768 psi (–0.1 to 5.3 MPa) and a low
pressure display range 500 micron to 551 psi (–0.1 to 3.8 MPa).
To increase pressure resistance, the hose material and base size
Charging hose
were changed.
A conventional (R22) vacuum pump can be used by installing a
vacuum pump adapter.
Vacuum pump
Be sure that the pump oil does not back flow into the system.
Use one capable for vacuum suction of 500 micron (–100.7 kPa).
Gas leakage detector
Special gas leakage detector for R410A refrigerant.
WARNING
WARNING
WARNING
Changes
2.4. Accessories
For installation purposes, be sure to use the parts supplied by the manufacturer or other
prescribed parts.
The use of non-prescribed parts can cause serious accidents such as the unit to fall, water
leakage, electric shock, or fire.
The following installation parts are furnished. Use them as required.
Keep the installation manual in a safe place and do not discard any other accessories until
the installation work has been completed.
Do not discard any accessories needed for installation until the installation work has been
completed.
Name and shape
Q'ty
Operation
manual
Installation
manual
Cable Tie (medium)
Cable Tie (small)
2.5. Optional parts
Description
Model
IR receiver unit
UTY-TRHX
Remote sensor
UTY-XSZX
UTY-XWZXZC
UTY-XWZXZB
External con-
UTY-XWZXZD
nect kit
UTY-XWZXZ7
UTY-XWZXZE
Modbus con-
UTY-VMSX
verter
Thermostat
UTY-TTRX
converter
Wireless LAN
UTY-TFSXZ*
adapter
External power
UTZ-GXXA
supply unit
24VAC heater
UTY-XWZXZK
connection cable
WARNING
Application
1
(This book)
1
For binding when rewiring for left to right
airflow application.
2
6
Application
For the wireless remote controller.
Room temperature sensor.
For output function.
(Output terminal / CNB01)
For control input function.
(Apply voltage terminal / CNA01)
For control input function.
(Dry contact terminal / CNA02)
For forced thermostat off function.
(Apply voltage terminal / CNA03)
For forced thermostat off function.
(Dry contact terminal / CNA04)
For connecting to the Modbus network.
For connecting to a third-party thermostat.
For wireless LAN control.
Supply power to the indoor unit PCB when the
indoor unit is turned off to prevent errors.
For connection with an external heater.
En-2
Hide quick links:
Advertisement
Table of Contents
