ESIE06-03
Removal procedure: outdoor unit ERYQ005~007AAV3
Part 5 – Disassembly and Maintenance
5–23
3
5
1
5
2.7
Removal of the Four Way Valve
Warning
Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.
Procedure
Step
Procedure
Points
1
Loosen the screw of the
four way valve coil.
P
Provide a protective sheet or a
steel plate so that the brazing flame
cannot influence peripheries.
P
Be careful so as not to break the
pipes by pressing it excessively by
pliers when withdrawing it.
Caution
Be careful about the four way valve,
pipes and so on, which were heated
up by a gas brazing machine, so as
not to get burnt your hands.
2
Heat up the brazed part
of the four way valve
and disconnect.
P
Be sure to apply
nitrogen
replacement when
heating up the
brazed part.
Cautions for restoration
P
Restore the piping by
non-oxidation brazing. Braze it
quickly when no nitrogen gas can
be used.
P
It is required to prevent the
carbonization of the oil inside the
four way valve and the
deterioration of the gaskets
affected by heat. For the sake of
this, wrap the four way valve with
wet cloth and provide water so that
the cloth will not be dried and avoid
excessive heating (keep below
120°C).
3
Heat up every brazed
part in turn and
disconnect.
In case of the difficulty with gas
brazing machine
P
Disconnect the brazed part where
is easy to disconnect and restore.
P
Cut pipes on the main unit by a
miniature copper tube cutter in
order to make it easy to disconnect.
Note
Do not use a metal saw for cutting
pipes by all means because the
sawdust come into the circuit.
Four way
valve
Four way
valve coil
Summary of Contents for Altherma EKHBH Series
Page 2: ...ESIE06 03 1 2 Part 1 System Outline 3 1 1 5 ...
Page 26: ...Functional Diagrams ESIE06 03 1 26 Part 1 System Outline 3 1 1 4 5 ...
Page 32: ...Piping Diagrams ESIE06 03 1 32 Part 1 System Outline 3 1 1 4 5 ...
Page 38: ...Switch Box Layout ESIE06 03 1 38 Part 1 System Outline 3 1 1 4 5 ...
Page 58: ...PCB Layout ESIE06 03 1 58 Part 1 System Outline 3 1 1 4 5 ...
Page 60: ...ESIE06 03 2 2 Part 2 Functional Description 3 1 2 5 ...
Page 68: ...Hydro box Functional Concept ESIE06 03 2 10 Part 2 Functional Description 3 1 2 4 5 ...
Page 88: ...ESIE06 03 3 2 Part 3 Troubleshooting 3 1 3 5 ...
Page 134: ...Error Codes System Malfunctions ESIE06 03 3 48 Part 3 Troubleshooting 3 1 3 4 5 ...
Page 152: ...Additional Checks for Troubleshooting ESIE06 03 3 66 Part 3 Troubleshooting 3 1 3 4 5 ...
Page 154: ...ESIE06 03 5 2 Part 5 Disassembly and Maintenance 3 1 5 ...