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4.2. Base heater forced off function
1736 model
The power to the Base heater can be cut off by changing the DIP switch setting.
SET1-3
Setting
ON
OFF
Forced off setting
4.3. Outdoor unit low noise operation function
Change the Outdoor unit low noise operation by using this setting.
SET2-1
Setting
ON
Lower
OFF
Low
When the low noise operation function is working, cooling and heating capacity will
decrease.
When changing the settings, explain to the customer beforehand that the capacity
decreases.
5. TEST RUN
Always connect the power supply 12 hours prior to the start of the operation in order
to protect the compressor.
(1) Indoor unit
1 Is the drain normal?
2 Is there any abnormal noise and vibration during operation?
(2) Outdoor unit
1 Is there any abnormal noise and vibration during operation?
2 Will noise, wind, or drain water from the unit disturb the neighbors?
3 Is there any gas leakage?
• Do not operate the air conditioner in the test running state for a long time.
• For the operation method of the test run for indoor unit, refer to the operating manual
and perform operation check.
5.1. TEST RUN method
Be sure to temporarily disconnect the power supply or turn off the breaker before
changing the DIP switch settings.
(1) Check the 3-way valves (both at the liquid side and gas side) are opened. Confi rm
that the DIP switch SET1-2 is switched OFF.
(2) Set the operation mode to "COOL" or "HEAT". If you wish to change the DIP switch
SET1-1 to "HEAT", switch it after temporarily disconnecting the power supply or
turning off the breaker switching the power off.
SET1-1
SET1
HEAT
ON
1 2 3 4
COOL
• In the fi rst test run, be sure to set the operation mode to "COOL".
• The operation mode cannot be switched between "COOL" and "HEAT" during the test
run. To switch the operation mode between "COOL" and "HEAT", stop the test run,
switch the operation mode, and then start the test run again.
En-12
9374995677-02_IM.indb 12
9374995677-02_IM.indb 12
CAUTION
CAUTION
(3) Press "TEST RUN" switch for more than 3 seconds.
The POWER / MODE LED fl ashes once.
TEST RUN
S
W
1
PUMP DOWN
SW1
POWER
ERROR
MODE
Blink
(1 time)
(4) Confi rm operating status.
(5) Press "TEST RUN" switch for more than 3 seconds.
POWER
ERROR
MONITOR
MODE
A
B
C
POWER/MODE LED will turn on, and test run stops.
6. FINISHING
6.1. Installing insulation
• Install insulation material after conducting "3.9. Sealing test".
• To prevent condensation and water droplets, install insulation material on the refrigerant
pipe.
• Use insulation with heat resistance above 248 °F (120 °C).
• Refer to the following table to determine the thickness of the insulation material.
■ Selection of insulation
[Use an insulation material with equal heat transmission rate or below 0.023
BTU/ft·h·°F (0.040 W/m·k)]
Insulation material minimum thickness [in (mm)]
Relative humidity
≤ 70%
1/4 (6.35)
5/16 (8)
3/8 (9.52)
3/8 (9)
Pipe diameter
1/2 (12.70)
3/8 (10)
[in (mm)]
5/8 (15.88)
3/8 (10)
3/4 (19.05)
3/8 (10)
* When the ambient temperature and relative humidity exceed 89.6 °F (32 °C) (DB) and
85% respectively, strengthen the heat insulation of refrigerant pipe.
6.2. Filling with putty
WARNING
Fill the piping holes and wiring holes with putty (supplied
locally) to avoid any gap (Fig A). If small animals such
as insects enter the external unit, a short circuit may be
caused near electrical components in the service panel.
If the outdoor unit is installed at a level that is higher than
the indoor unit, the water that has condensed in the 3-way
valve of the outdoor unit could travel to the indoor unit.
Therefore, use putty in the space between the pipe and
the insulation to prevent the entry of water to the indoor
units.
MONITOR
A
B
C
D
E
F
D
E
F
≤ 75%
≤ 80%
≤ 85%
3/8 (10)
1/2 (13)
11/16 (17)
7/16 (11)
9/16 (14)
11/16 (18)
1/2 (12)
9/16 (15)
3/4 (19)
1/2 (12)
5/8 (16)
13/16 (20)
1/2 (13)
5/8 (16)
13/16 (21)
Fig. A
Putty
Insulation
12/9/2020 3:41:48 PM
12/9/2020 3:41:48 PM
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