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1. In cascade system, Tbt sensor must be connected to master unit and set Tbt vaild on user interface,
otherwise all slave units will not work.
2. If outside circulation pump need to be connected in series in system when the head of internal water
pump is not enough, outside circulation pump is suggested to be installed after the balance tank.
3. Please ensure that the maximum interval of power-on time of all units doesn't exceed 2min, otherwise the
time for querying and allocating addresses will be missed, which may cause the slaves to fail to
communicate normally and report Hd error.
4. Maximum 6 units can be cascaded in one system.
5. The outlet pipe of each unit must be installed with a check valve.
8.4 Buffer tank volume requirement
Model
5~9 kW
12~16 kW
Cascade system
n: The outdoor unit numbers
9 OVERVIEW OF THE UNIT
9.1 Main components
9.1.1 Hydraulic module
1
2
3
5.4
5.3
Code
Assembly unit
Flow switch
1
Automatic air purge valve
2
Expansion vessel
3
Pressure relief valve
4
Temperature sensor
5
Plate heat exchanger
6
7
Pump
Water inlet
8
Water outlet
9
Buffer tank(L)
Detects water flow rate to protect compressor and
water pump in the event of insufficient water flow.
Remaining air in the water circuit will be
automatically removed from the water circuit.
Balances water system pressure.
Prevents excessive water pressure by opening at 3
bar and discharging water from the water circuit.
Four temperature sensors determine the water and
refrigerant temperature at various points in the water
circuit .
5.1 -TW-out; 5.2 -Tw-in; 5.3 -T2; 5.4 -T2B
Transfer heat from the refrigerant to the water.
Circulates water in the water circuit.
17
8
9
4
5.1
6
7
5.2
Explanation
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V.1
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