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2.2. Special tools for R410A
Tool name
Contents of change for R22 tool
Pressure is huge and cannot be measured with a conventional gauge.
To prevent erroneous mixing of other refrigerants, the diameter of each
Gauge
port has been changed.
manifold
It is recommended to use a gauge manifold with a high pressure display
range 30 inHg to 768 psi (-0.1 to 5.3 MPa) and a low pressure display
range 30 inHg to 551 psi (-0.1 to 3.8 MPa).
Charging
To increase pressure resistance, the hose material and base size were
hose
changed.
A conventional vacuum pump can be used by installing a vacuum pump
adapter.
Vacuum
• A conventional vacuum pump can be used by installing a vacuum
pump
pump adapter.
• Be sure that the pump oil does not back flow into the system. Use one
capable for vacuum suction of 30 inHg (-100.7 kPa).
Gas leakage
Special gas leakage detector for HFC refrigerant R410A.
detector
2.3. Accessories
Use connecting parts as required.
Do not throw away the connecting parts until the installation has been complete.
Name and shape
Specifications
manual
Installation
manual
Drain cap
Drain pipe
Cable tie
Conduit plate
2.4. Optional parts
The following parts are optional parts specific to R410A refrigerant.
Do not use parts other than those listed below.
2.4.1. Separation tube kit
Separation tube uses the following parts.
Separation tube
Total cooling capacity of indoor unit [BTU/h]
UTP-AX054A
2.4.2. Header
Header uses the following parts. A header is used for connecting the indoor units.
Header
3-6 Branches
3-8 Branches
UTR-H0906L
UTR-H0908L
2.4.3. External connect kit
Model
For External input (CN131, CN132, CN133, CN134)
UTY-XWZXZ6
For External output (Error status / CN136) (Operation status / CN137)
UTY-XWZXZF
For External input (CN135)
UTY-XWZXZ9
For External output (Base heater / CN115)
2.5. About unit of the length
All Fujitsu General products are manufactured to metric units and tolerances. United
States customary units are provided for reference only. In cases where exact dimensions
and tolerances are required, always refer to metric units.
En-3
Q'ty
Application
—
1
(This book)
1
For outdoor unit drain piping work
7
For outdoor unit drain piping work
1
For binding power cable and trans-
mission cable
4
To fix Conduit tube
1
CAUTION
ALL
Total cooling capacity of
indoor unit [BTU/h]
ALL
Usage
3. INSTALLATION WORK
Please obtain the approval of the customer when selecting the location of installation and
installing the main unit.
3.1. Selecting an installation location
Install the unit in a location that can withstand its weight, and where it will not topple or
fall.
Calculate the proper refrigerant concentration if you will be installing it in an enclosed
location.
Total amount of replenished refrig-
erant in refrigerant facility [lb (kg)]
Capacity of smallest room where
unit is installed [1,000 ft³ (m³)]
If the results of the calculation exceed the concentration limit, increase the room surface
area or install a ventilation duct.
Please install the outdoor unit without slant. (within 3 degrees)
Install this unit in a location with good ventilation.
If the unit must be installed in an area within easy reach of the general public, install as
necessary a protective fence or the like to prevent their access.
Install the unit in an area that would not inconvenience your neighbors, as they could be
affected by the airflow coming out from the outlet, noise, or vibration.
If it must be installed in proximity to your neighbors, be sure to obtain their approval.
If the unit is installed in a cold region that is affected by snow accumulation, snow fall, or
freezing, take appropriate measures to protect it from those elements.
To ensure a stable operation, install inlet and outlet ducts.
Install the unit in an area that would not cause problems even if the drain water is
discharged from the unit. Otherwise, provide drainage that would not affect people or
objects.
Install the unit in an area that has no heat sources, vapors, or the risk of the leakage of
flammable gas in the vicinity.
Install the unit in an area that is away from the exhaust or vent ports that discharge
vapor, soot, dust, or debris.
Install the indoor unit, outdoor unit, power supply cable, transmission cable and remote
control cable at least 40 in (1 m) away from a television or radio.
The purpose of this is to prevent TV reception interference or radio noise. (Even if they
are installed more than 40 in (1 m) apart, you could still receive noise under some signal
conditions.)
Keep the length of the piping of the indoor and outdoor units within the allowable range.
For maintenance purposes, do not bury the piping.
3.2. Drain processing
Perform drain work in accordance with this Manual, and ensure that the drain water is
properly drained. If the drain work is not carried out correctly, water may drip down from
the unit, wetting the furniture.
When the outdoor temperature is 32 °F (0 °C) or less, do not use the accessory drain
pipe and drain cap. If the drain pipe and drain cap are used, the drain water in the pipe
may freeze in extremely cold weather.
• If you are installing the drain pipe and drain caps,
please provide a working space under the base of
the outdoor unit.
• As the drain water flows out of the outdoor unit
during heating operation, install the drain pipe and
connect it to a commercial 5/8 in (16 mm) hose.
• When installing the drain pipe, plug all the holes
other than the drain pipe mounting hole in the
bottom of the outdoor unit with putty so there is no
water leakage.
Drain cap mounting hole ×7
3 (76)
1-15/16 (50)
Air
1-9/16 (40)
10-15/16 (278)
17-1/4 (438)
20-11/16 (526)
24-1/2 (622)
27-3/16 (690)
WARNING
Refrigerant concentration [lb/1,000 ft³ (kg/m³)]
≤
[25 lb/1,000 ft³ (0.40 kg/m³)]
CAUTION
CAUTION
Drain pipe mounting hole
Base of the outdoor unit
Drain pipe
Drain pipe mounting hole
Unit: in (mm)
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