Mitsubishi Electric e Series Service Handbook page 105

[ VII Control ]
Cooling/heating Circuit Control and General Function of System Equipment
-9- Water-temperature control
Water temperature can be controlled in the following way.
Outlet-water-temperature-based control
External temperature sensor 1
External temperature sensor 2
An optional External temperature sensor (TW-TH16) is required.
Outlet water
External
temperature
sensor 2
(SW5-5 ON)
External temperature sensor 1
Used to control the water temperature of simultaneous operating group.
External temperature sensor 2
The water outlet temperature of each unit in the identical water system group is corrected to bring the water
temperature at the merged section of the outlet water pipes toward the target temperature.
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 3.0ºC (Cooling)
HWE20010
SW5-4
OFF
ON
-
System
Sub unit
leader
unit
SW5-5 ON
SW5-4 ON
SW5-4 ON
Group
Sub unit
leader
unit
SW5-4 ON
SW5-4 ON
Group
Sub unit
leader
unit
SW5-4 ON
SW5-4 ON
External temperature sensor 1
(SW5-4 ON)
SW5-5
OFF
-
ON
Sub unit
Simultaneous
operating group
SW5-4 ON
Sub unit
Simultaneous
operating group
SW5-4 ON
Sub unit
Simultaneous
operating group
SW5-4 ON
- 96 -
Identical water
system group
GB