Mitsubishi Electric e Series Service Handbook page 111

[ VII Control ]
Cooling/heating Circuit Control and General Function of System Equipment
-10- Water-temperature control
Water temperature can be controlled in the following way.
Outlet-water-temperature-based control
Water temperature control based on the
external water temperature reading
1. When the units are restarted after stopping for under a condition other than Thermo-OFF
Conditions for the units to stop other than the Thermo-OFF condition
Pump interlock is off.
When one of the units in a set is forced to stop
When the units were stopped under the following conditions:
1. Outlet water temperature has reached 57ºC (Heating)
2. Outlet water temperature has reached 3.6ºC (Cooling)
3. Outlet brine temperature has reached -14.4ºC (Cooling)
sensor
Built-in thermistor
External water tempera-
ture
HWE1417B
SW2-5
OFF
(Factory setting)
ON
Control method
Outlet water temperatures < 53 ºC (Heating)
OR
Outlet-water-temper-
Outlet water temperatures > 7 ºC (Cooling)
ature-based control
OR
Outlet brine temperatures > -8 ºC (Cooling)
External water temperature < 53 ºC (Heating)
OR
External water tem-
External water temperature > 7 ºC (Cooling)
perature
OR
External brine temperature > -8 ºC (Cooling)
Thermo-ON conditions
- 102 -
GB