50
50
17) Remove the four socket head cap screws securing the evaporator with the housing.
18) Lift off the evaporator.
HOUSING AND MECHANICAL SEAL
19) The mechanical seal consists of two parts. One part rotates with the auger, the other is
static and is fitted into a top recess in the housing. If the contact surfaces of these two
parts become worn or scratched, the mechanical seal may leak water and should be
replaced.
20) Remove the O-ring on the top outer edge of the housing.
21) Remove the four bolts and lift the housing clear of the gear motor. Check the bearing
inside the housing. If it is worn or scratched, replace it using a fitting tool. Carefully
ease out the lower part of the mechanical seal before replacing the bearing.
Note: If a fitting tool is not available, replace the whole lower housing complete with
bearing.
GEAR MOTOR
22) Cut the connectors.
23) Remove the three socket head cap screws securing the gear motor.
24) Assemble the removed parts in the reverse order of which they were removed.
Be careful not to scratch the surface of the O-ring, or it may cause water leaks. Handle
the mechanical seal with care not to scratch nor to contaminate its contact surface.
WARNING
25) When replacing the evaporator;
(a)
Braze the new evaporator with nitrogen gas flowing at the pressure of 0.2 - 0.3 bar.
(b) Replace the drier.
(c) Check for leaks using nitrogen gas (10 bar) and soap bubbles.
(d) Evacuate the system, and charge it with refrigerant. See the nameplate for the
required refrigerant charge. (See “1. [d] EVACUATION AND RECHARGE”).
26)
Refit the panels in their correct position.
27) Connect the power source.
