27
(4) Selecting earth leakage breaker (NV)
10. THE PUTTING CONDITION OF THE BELT
1. Set the parallel angle of the fan and the motor pulley as shown in the table and figure 1 below.
2. Set the tension of the per one belt when the flexion load is within the range as shown in the figure 1 and table 2
below at the proper flexion. (A=0.016xC mm)
3. Adjust the suitable tension after the belt sit properly across the pulley (after working for 24-28 hours).
When the new belt is used, adjust the suitable tension about the 1.3 times of the maximum value of the flexion
load.
4. Readjust the belt every 2,000 hours after the first adjustment.
Exchange the belt when the belt’s surroundings length has expanded by 2% including the first expansion of the
belt. (About 1%) (about 8,000 hours converted working time)
11. BEFORE STARTING THE TRIAL RUN
After having installed the unit, check that:
(1) The unit is fixed securely.
(2) The unit is installed properly.
(3) The drain pipe is provided with a drain pipe.
(4) The electrical wiring has been connected correctly and the terminal screws have been properly
tightened.
(5) The duct work has been performed correctly.
(6) Before turning the unit on, measure the resistance between the terminals of the electrical parts and
ground with a 500V megger and check that the value is at least 1.0M ohm.
If the measured value is below 1.0M ohm, do not operate the unit.
(7) The unit is used phase protector (47).
If wiring phase of power supply is mistaken, the unit does not run.
Please reconfirm and modify wiring phase.
(8) Check that the fans are rotating in the proper direction.
(9) Check to see whether there are refrigerant leakage, and slack power or transmission cable.
(10) Check the operation of high-pressure switch.
If the two lead wires of the outdoor unit fan motor are disconnected from the contactor and cooling is
performed, the high-pressure switch should operate and stop the unit after 5 to 10 minutes.
Perform trial operation after completion of above items.
To select NF or NV instead of a combination of Class B fuse switch
use the following.
In the case of Class B fuse rated 15A.
NV is a product of ACSON.
Table on the right is an example. The selection of
other capacities should be determined in
accordance with the relevant standards.
Fuse
(Class B)
Earth leakage breaker
(with over-load protection)
ART080A/AR
50A
NV50-CP
50A
30mA 0.1s or less
ART100A/AR
50A
NV50-CP
50A
30mA 0.1s or less
ART150A/AR
100A
NV100-CP
100A 100mA 0.1s or less
ART200A/AR
100A
NV100-CP
100A 100mA 0.1s or less
Note.
All electrical wiring must be comply with
local electrical authority regulations.
table 1
Parallel angle
pulley
K (“)
note
pulley
10 or less
Gap of 3 mm every 1 m
table 2
pulley
type
Smaller out diameter (mm)
Flexion load W (N)
~ 135
22 ~ 29
136 ~ 160
27 ~ 34
B
161 ~
29 ~ 37