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SINCLAIR
(2) Disassembly of Four-Way Valve
Procedure
1. Disconnect the four-way valve
by welding.
2. Remove the four-way valve.
3. Place the four-way valve to the
original position.
4. Connect the four-way valve to
by welding.
NOTE: Before replacing the four-way valve, cut off power supply for the unit and recycle refrigerant properly.
(3) Disassembly of Electronic Expansion Valve
Procedure
1.
Remove
the
coil
electronic expansion valve.
2.
Disconnect
the
electronic
expansion valve by welding.
3.
Connect
the
electronic
expansion valve by welding
4. After replacing the electronic
expansion valve, power off the unit
and power it on again.
NOTE: Before replacing the electronic expansion valve, cut off power supply for the unit and recycle refrigerant properly.
3.2.2 Disassembly of Key Components of the Water Tank
(1) Procedure for replacing the water tank temperature sensor
1) Screw off threading coil of the temperature sensor.
2) Remove the temperature sensor cover.
3) Take out the temperature sensor.
4) Install a new temperature sensor and assemble related parts in sequence. After the
temperature sensor cord is properly placed, start the unit for trial run.
(2) Procedure for replacing the magnesium stick
AIR SOURCE HEAT PUMP WATER HEATER SERVICE MANUAL
Disassembly of Four-Way Valve
● Record direction of the four-way valve before disconnecting it as the direction for
two systems of a dual-system unit may differ.
● Remove the coil and mark the direction.
● Wrap the four-way valve with a wet cloth to protect the sliding block in the valve
against being burnt during welding and prevent water from entering the pipe.
● Nitrogen must be charged for protection during welding. Nitrogen pressure:
0.5±0.1bar (gauge pressure)
● Remove the four-way valve with care to avoid touching other parts, components, or
pipes.
● Place the four-way valve to the original position with care to avoid touching other
parts, components, or pipes.
● Model of the new four-way valve must be the same as the original one.
● Pipe connection must be the same as the original connection.
● Nitrogen must be charged for protection during welding. Nitrogen pressure: 0.5±0.1
bar (gauge pressure)
Disassembly of Electronic Expansion Valve
● Generally, the concave on the valve meshes with the convex on the coil. Before
of
the
removing the electronic expansion valve, turn the coil clockwise or counterclockwise
for a small angle until that the convex is between two adjacent concaves.
Disconnect the convex from the concave and then remove the coil upwards.
● Avoid burning other pipes during welding.
● Remove the electronic expansion valve with care to avoid touching other parts,
components, or pipes
● Nitrogen must be charged for protection during welding. Nitrogen pressure:
0.5±0.1bar (gauge pressure)
● Model of the new electronic expansion valve must be the same as the original
one.
● Wrap the expansion valve with a wet cloth to protect the sliding block in the valve
against being burnt during welding and prevent water from entering the pipe.
● Nitrogen must be charged for protection during welding. Nitrogen pressure:
0.5±0.1bar (gauge pressure)
● Install the coil after the connection pipe is welded. Ensure that the convex on the
coil meshes with the concave on the valve.
● If the coil plug of the electronic expansion valve is re-connected after being
disconnected from the mainboard, the unit must be powered on again after being
powering off.
Description
Description
59
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