8
Limitations and Warnings
18 (Centralized controller shows B2)
OFF
ON
OFF
OFF
ON
19 (Centralized controller shows B3)
ON
ON
OFF
OFF
ON
20 (Centralized controller shows B4)
OFF
OFF
ON
OFF
ON
21 (Centralized controller shows B5)
ON
OFF
ON
OFF
ON
22 (Centralized controller shows B6)
OFF
ON
ON
OFF
ON
23 (Centralized controller shows B7)
ON
ON
ON
OFF
ON
24 (Centralized controller shows B8)
OFF
OFF
OFF
ON
ON
Type: 0 - c heating 1 - cooling only
Two-way valve interlock: 0 - normal 1 - two-way valve interlocking
Note: The function is invalid if “Modular control” is selected
Control: 0 - single unit control 1 - modular control
1-5. Anti-freezing Measures in Winter
If the heat exchanger pipeline at water side is frozen, it will be seriously damaged, namely the heat exchanger will break or leak. Such freezing
damage is not covered in warranty, therefore user should take anti-freezing measures.
• If the unit is shut down for standby under low temperature environment (outdoor environment with temperature below 2
℃
), user should
drain the water in the water system.
• During operation, the water pipeline can be frozen if the chilled water target flow controller and the anti-freezing temperature sensor are
invalid. Therefore, user must connect the target flow controller according to the wiring diagram.
• During maintenance, the heat exchanger at water side can be frozen when refilling refrigerant to the unit or discharging refrigerant for repair.
Therefore, user must keep the water moving inside the heat exchanger or completely drain the water.
