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- If water is mixed in the R407C, the refrigerator oil may deteriorate.
- Since R407C does not contain any chlorine, gas leak detectors for conven-
tional refrigerants will not react to it.
•
Do not use a charging cylinder.
- Using a charging cylinder may cause the refrigerant to deteriorate.
•
Be especially careful when managing the tools.
- If dust, dirt, or water gets in the refrigerant cycle, the refrigerant may deterio-
rate.
1.3. Before getting installed
Caution:
•
Do not install the unit where combustible gas may leak.
- If the gas leaks and accumulates around the unit, an explosion may result.
•
Do not use the air conditioner where food, pets, plants, precision instru-
ments, or artwork are kept.
- The quality of the food, etc. may deteriorate.
•
Do not use the air conditioner in special environments.
- Oil, steam, sulfuric smoke, etc. can significantly reduce the performance of
the air conditioner or damage its parts.
•
When installing the unit in a hospital, communication station, or similar
place, provide sufficient protection against noise.
- The inverter equipment, private power generator, high-frequency medical
equipment, or radio communication equipment may cause the air conditioner
to operate erroneously, or fail to operate. On the other hand, the air condi-
tioner may affect such equipment by creating noise that disturbs medical
treatment or image broadcasting.
•
Do not install the unit on a structure that may cause leakage.
- When the room humidity exceeds 80 % or when the drain pipe is clogged,
condensation may drip from the indoor unit. Perform collective drainage work
together with the outdoor unit, as required.
1.4. Before getting installed (moved) - elec-
trical work
Caution:
•
Ground the unit.
- Do not connect the ground wire to gas or water pipes, lightning rods, or
telephone ground lines. Improper grounding may result in electric shock.
•
Install the power cable so that tension is not applied to the cable.
- Tension may cause the cable to break and generate heat and cause a fire.
•
Install an leak circuit breaker, as required.
- If an leak circuit breaker is not installed, electric shock may result.
•
Use power line cables of sufficient current carrying capacity and rating.
- Cables that are too small may leak, generate heat, and cause a fire.
2. Accessories
The unit is provided with the following accessories:
[Fig. 2.0.1] (P. 2)
No.
Accessories
1
Controller
2
Thermistor
3
Clip (1 spare)
4
Insulation (2 spares)
5
Tie band (2 spares)
6
Installation manual
7
Tube
3. System component
[Fig. 3.0.1] (P. 2)
A Air handling unit controller (PAC-AH10A-G)
B Air handling unit (field supply)
C Controller (field supply)
D Outdoor unit
E Evaporator (field supply)
F Gas pipe
G Liquid pipe
H Thermistor (liquid pipe)
I Thermistor (inlet air)
3.1. Selection of the evaporator (air handling
unit)
3.1.1 Compressive strength
The design pressure of this system is 3.3MPa. The compressive strength of the
evaporator and of other pipes must exceed 9.9MPa (=3.3 × 3).
6
•
Use only a circuit breaker and fuse of the specified capacity.
- A fuse or circuit breaker of a larger capacity or a steel or copper wire may
result in a general unit failure or fire.
•
Do not wash the air conditioner units.
- Washing them may cause an electric shock.
•
Be careful that the installation base is not damaged by long use.
- If the damage is left uncorrected, the unit may fall and cause personal injury
or property damage.
•
Be very careful about product transportation.
- Only one person should not carry the product if it weighs more than 20 kg.
- Some products use PP bands for packaging. Do not use any PP bands for a
means of transportation. It is dangerous.
- Do not touch the heat exchanger fins. Doing so may cut your fingers.
- When transporting the outdoor unit, suspend it at the specified positions on
the unit base. Also support the outdoor unit at four points so that it cannot
slip sideways.
•
Safely dispose of the packing materials.
- Packing materials, such as nails and other metal or wooden parts, may cause
stabs or other injuries.
- Tear apart and throw away plastic packaging bags so that children will not
play with them. If children play with a plastic bag which was not torn apart,
they face the risk of suffocation.
1.5. Before starting the test run
Caution:
•
Turn on the power at least 12 hours before starting operation.
- Starting operation immediately after turning on the main power switch can
result in severe damage to internal parts. Keep the power switch turned on
during the operational season.
•
Do not touch the switches with wet fingers.
- Touching a switch with wet fingers can cause electric shock.
•
Do not touch the refrigerant pipes during and immediately after opera-
tion.
- During and immediately after operation, the refrigerant pipes are may be hot
and may be cold, depending on the condition of the refrigerant flowing through
the refrigerant piping, compressor, and other refrigerant cycle parts. Your
hands may suffer burns or frostbite if you touch the refrigerant pipes.
•
Do not operate the air conditioner with the panels and guards removed.
- Rotating, hot, or high-voltage parts can cause injuries.
•
Do not turn off the power immediately after stopping operation.
- Always wait at least five minutes before turning off the power. Otherwise,
water leakage and trouble may occur.
Quantity
1
2
2
4
6
1
3
3.1.2 Contamination control
Control the contamination to keep proper quality of the models using HFC refriger-
ant.
3.1.3 Specifications of the evaporator
Select the evaporator (field supply) according to the table below.
Caution:
If not, malfunction of the outdoor unit may be caused.
Type
PAC-AH10A-G
Saturated refrigerant temperature at exit of evaporator = 7.5 °C, SH=5K, liquid
temperature = 48 °C, air = 27 °CDB/19 °CWB
*
When the diameter of the heat exchanger tube is ø9.52.
Caution:
The evaporator must be used within the following temperature range.
Inlet air temperature range of the air handling unit: 15-24˚CWB (cooling only).
Unit size
Allowed evaporator
Allowed evaporator
(Air handling unit)
capacity
volume
15.5 ~ 25.0 kW
P8
3000 ~ 5700 cm
P10
19.5 ~ 30.0 kW
3750 ~ 7100 cm
Standard evaporator
path number*
3
10 ~ 12
3
10 ~ 12
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