Specifications
67
Installation of ducts to an air conditioner requires a considerably high external static pressure, which may
overrange the working capacity of a motor and pulley for standard use. In such a case, it is necessary to
replace the motor or pulley.
6.1 Applicable Model
Model
Item
Replacement of fan motor and pulley
Fan motor capacity upgrading
USP3H
USP5H
USP8H
USP10H
––
USP15H
USP20H
6.2 Mounting Procedure
6.2.1 Required Parts
6.2.2 Mounting Work Procedure
¡ In the case of fan pulley replacement only -USP3H~USP20H
1. Remove the suction grille, front plate (upper) and rear plate.
2. Remove the V-belt from the motor pulley, and remove the motor pulley from the motor shaft.
3. Replace the V-belt and motor pulley with those supplied for replacement.
4. Adjust the V-belt tension.
5. Place the suction grille, front plate (upper) and rear plate back in position.
¡ In the case of double capacity fan motor-USP3H, USP5H, USP8H, USP15H
1. Remove the suction grille, front plates (upper & lower) and rear plate.
2. Remove the V-belt.
3. Mount the motor pulley to the double capacity motor. (However, select the pulley within the range.)
......Refer to Page 27~28.
4. Replace the fan motor with the double capacity motor. (Replace the motor setbolts with the ones M8
35).
5. Replace the V-belt with the one of an appropriate length, and adjust the belt tension.
6. Open the switch box cover and replace the fan motor magnetic switch.
7. Close the switch box cover and place the suction grille, front plates (upper & lower) and rear plate back
in position.
6.2.3 How to pull off Fan Motor Pulley
Pull off the pulley in the following manner to prevent the motor shaft
bearing from getting damaged.
6. Fan Motor One Size Larger
Fan motor
Magnetic switch for fan motor
Motor setbolt
V-belt
USP3H
380, 400/400, 440V
50/60Hz, 0.75kW 4P
CLK-15JTH40-P6
(1.5A set)
USP5H
380, 400/400, 440V
50/60Hz, 0.75kW 4P
CLK-15JTH40-P6
(1.5A set)
Type A1
M830, 4pcs.
USP8H
380, 400/400, 440V
50/60Hz, 1.5kW 4P
CLK-15JTH40-P6
(3.2A set)
M835, 4pcs.
USP15H
380, 400/400, 440V
50/60Hz, 5.5kW 4P
HOE-20F-TFH1B
(11A set)
M1035, 4pcs.
Type B2
: Since the characteristics of motor varies depending on the manufacturer, select appropriate motor, fan and v-belt by referring to the
above OC set values.