Specifications

-43-
NV is a product of MITSUBISHI ELECTRIC.
Table above 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)
PRHG - 8MYA 50A NV50-CP 30mA 0.1s or less
PRHG - 10MYA 50A
PRHG - 15MYA 100A NV100-CP 100mA 0.1s or less
NV50-CP 30mA 0.1s or less
PRHG - 20MYA 100A NV100-CP 100mA 0.1s or less
50A
50A
100A
100A
The grounding wire must be of the same diameter as the
power cable wires. Table above is an example.
The selection of other capacities should be determined in
accordance with the relevant standards.
Breaker
capacity
Over current
protection switch
PRHG-8MYA
Power
cable
14mm
2
Earth cable
PRHG-10MYA
PRHG-15MYA
PRHG-20MYA
14mm over50A
2
22mm
2
14mm
2
50A
14mm over
2
100A 22mm over
2
38mm
2
100A
22mm over
2
50A
50A
100A
100A
11. Before starting the trial run
A
K
K
K
K
K
10. The putting condition of the belt
figure2 Belt tensionfigure1 Parallel degree of pulley
pulley
parallel angle
pulley
K ( )
10 or less gap of 3mm every 1m
note
table 1
Flexion load(W)
A=0.016xC(mm)
type
135
22 29
Flexion load W
(N)
table 2
smaller out diameter
(mm)
136 160
161
27 34
29 37
B
pulley
C
(3) Wiring example (For metal piping)
(4) Selecting earth leakage breaker (NV)
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.
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 = 0.016 × C mm)
3. Adjust the suitable tension after the belt sit properly across the pulley (after more 24-28 hours working).
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)
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 trap.
(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.
Turn universal power supply at least 6 hours before getting test run in order to current to crank heater.
If current-carrying hours are too short, it may result in a malfunction of compressor.
(7) Check that the fans are rotating in the proper direction.
(8) Check to see whether there are refrigerant leakage, and slack power or transmission cable.
(9) 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 above items.
Note:
All electrical wiring must be comply with local
electrical authority regulations.