Removing Total Heat Exchanging Rotor; Removing Air Supply Fan Assembly And Exhaust Fan Assembly - Hitachi FSG Series Service Manual

2
SERVICING
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WARNING: TURN OFF all power source switches
2.9.2 REMOVING TOTAL HEAT EXCHANGING
ROTOR
1. Turn off the power source for the total heat exchanger.
2. Remove the air filters for supply air and exhaust air before
removing the total heat exchanging rotor.
3. Remove the check panel, and the total heat exchanging
rotor can be removed by drawing out from the side of the
unit as shown below. When removing the total heat
exchanging rotor, remove the connector of the motor wire
for the rotor (with black cover).
2.9.3 REMOVING AIR SUPPLY FAN ASSEMBLY
AND EXHAUST FAN ASSEMBLY
1. Turn off the power source for the total heat exchanger.
2. Remove the air filters and the total heat exchanging rotor
according to the items, 2.9.1 and 2.9.2 before removing the
air supply fan assembly and the exhaust fan assembly.
3. Remove the air supply side partition plate and the exhaust
side partition plate.
The supply air side partition plate is fixed with one (1)
screw and the exhaust air side partition plate with three (3)
screws at the check hole side. Remove these screws and
remove these plates by drawing towards the center of the
unit.
4. When removing the fan assembly, remove the eight (8) M6
bolts fixing the motor base to the unit and suction bell-
mouth fixed to the fan casing together. The suction bell-
mouth can be removed when the cut-out part of the bell-
mouth is horizontal by rotating counterclockwise.
Remove the air supply fan assembly by pulling out from the
fan casing, drawing towards the center and drawing out
towards the front side.
Remove the exhaust fan assembly by pulling out from the
fan casing, drawing towards the center and drawing out
towards the front side.
Air Discharge
Outdoor Air
Service Cover
Rotor Base
Discharge Fan Casing
Air Discharge
Outdoor Air
Screw
(3pcs.)
Partition Plate for
Discharge Side
Screw
(1pcs.)
Air Supply Fan Assembly
Air Supply Fan Casing
Heat Exchange Rotor
Indoor Air
Air Supply
Discharge Fan Assembly
Indoor Air
Air Supply