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Mitsubishi Electric PURY-WP200 Service Manual page 117

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[ VII Control ]
Water rate valve control
-3- Water flow rate valve control
Depending on the capacity required, periodic control is performed every one minute to keep the temperature difference be-
tween the heat exchanger outlet pipe temperature and indoor unit port pipe temperature within 4.0ºC for cooling and 4.5ºC for
heating, and the opening is controlled in the range between 85 and 950 pulses.
For the degree of valve opening, "0" indicates fully open and "1600" indicates fully closed.
3-way valve control
-4- 3-way valve control
The following table shows the control pattern of the 3-way valve in different operation modes to switch the water flow.
(1) Cooling-only Thermo-ON, Cooling-only Thermo-OFF, and Cooling-only test run
Outdoor unit operation mode
Cooling-only Thermo-ON
Cooling-only Thermo-OFF
Cooling-only test run
(2) Heating-only Thermo-ON and Heating-only Thermo-OFF
Outdoor unit operation mode
Heating-only Thermo-ON
Heating-only Thermo-OFF
(3) Heating-main Thermo-ON, Heating-main Thermo-OFF, Cooling-main Thermo-ON and Cooling-main Thermo-OFF
Outdoor unit operation mode
Heating-main Thermo-ON
Cooling-main Thermo-ON
Heating-main Thermo-OFF
Cooling-main Thermo-OFF
HWE1113B
Connected indoor unit
MV1 command value
operation mode
Stop
Fan
Thermo-ON
Thermo-OFF
Stop
Fan
Thermo-OFF
Stop
Fan
Thermo-ON
Thermo-OFF
Connected indoor unit
MV1 command value
operation mode
Stop
Fan
Thermo-ON
Thermo-OFF
Stop
Fan
Thermo-OFF
Connected indoor unit
MV1 command value
operation mode
Stop
Fan
Cooling Thermo-ON
Cooling Thermo-OFF
Heating Thermo-ON
Heating Thermo-OFF
Stop
Fan
Cooling Thermo-OFF
Heating Thermo-OFF
- 108 -
MV2 command value
for opening
for opening
1
1
2
2
1
1
2
1
1
2
2
MV2 command value
for opening
for opening
1
1
2
2
1
1
2
MV2 command value
for opening
for opening
1
1
0
0
1
1
1
1
0
1
1
1
2
2
1
1
2
1
1
2
2
1
1
2
2
1
1
2
1
1
0
0
1
1
1
1
0
1
GB
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