Installer reference guide / Mono tank integrated type 134
External Room Thermostat (Field Option)
• The values in the following table are just examples for your understanding.
Main menu
(FSV)
Menu Item
Step Unit
FSV
Default Min.
Max.
WL Item
20**
External
Control
External Room Thermostat
#1 (UFHs) 1 - 2091 0(No) 0 4
#2 (FCUs) 1 - 2092 0(No) 0 4
• Thermostat #1 (#2091, Default 0 for no usage), #2 (#2092, Default 0 for no usage)
– To use wired remote controller for heating/cooling operation, both of the above settings should be set to 0
simultaneously. If not, thermostat controls system.
– To use the external room thermostat option, set the 2-zone control option (FSV #4061) to "0" for disabling it.
– If set to #2091/#2092: 1, the compressor can be turned on or off only by the thermostat.
– If set to #2091/#2092: 2~4, the compressor can be turned on or off by the thermostat or according to the WL
discharged water temperature.
• #2091/ #2092 Setting value:
2
3
4
1min 1min
Time
Time
Time
Time
Time
Time
Water pump
WL Thermo
Water pump
WL Thermo
Water pump
WL Thermo
3min 7min 7min3min 3min
1
0
1
0
1
0
1
0
1
0
1
0
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