92
ENGLISH
Door 1
To access to the compressor and electrical parts.
Door 2
To access to the hydraulic compartment and electrical parts.
b. Master unit operates in heating mode. When iniet water temperature is too low, or while ambient temperature is too low, the target
leaving water temperature is too high, AHS will be turned on automatically.
2) When AHS is set valid in heating mode and DHW mode, it will be turned on in following conditions:
When master unit operates in heating mode, conditions of turning on AHS is same as 1); When master unit operates in DHW mode,
if T5 is too low or when ambient temperature is too low, target T5 temperature is too high, AHS will be turned on automatically.
3) When AHS is valid, and the operation of AHS is controlled by M1M2. When M1M2 closes, AHS is turned on. When master unit ope
-
rates in DHW mode, AHS can't be turned on by closing M1M2.
TBH ( Tank booster heater ) Control
TBH should be set via the dip switches on main board (referto 10.1). TBH is only controlled by master unit. Please refer to 8.1 for specific
TBH control.
Solar energy Control
Solar energy is only controlled by master unit. Please referto 8.1 for specific solar energy Control.
NOTE
1)
Maximum 6 units can be cascaded in one system. One of them is master unit, the others are slave units. Master unit and slave units are
distinguished by whether connected to wired controller while poweing on. The unit with wired controller is master unit, units without wired
controller are slave units. Only master unit can operate in DHW mode. While installation, please check the cascade system diagram and
determine the master unit. Before powering on, remove all wired controllers of slave units.
2) SV1, SV2, SV3,
PUMP O, PUMP C, PUMP S, T1, T5, TW2, Tbt1, Tsolar, SL1, SL2, AHS, TBH interface are only need to be connected to
corresponding terminals on main board of master unit. Please refer to 9.3.1 and 9.7.6.
3) The system is with auto addressing function. After initial powering on, the master unit will assign addresses for slave uinits. Slave units will keep
the addresses. After powering on again, slave units will still use the previous addresses. The addresses of slave units aren't need set again.
4) If Hd error occurs, please refer to 13.4
5) It is suggested to use the reversed return water system in order to avoid hydraulic imbalance between each unit in a cascade system.
b
CAUTION
1) In cascade system, Tbt1 sensor must be connected to master unit and set Tbt1 valid on user interface (refer to 10.5.16) or 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 outle
t pipe of each unit must be installed with a check valve.
8.4 Balance tank volume requirement
Model
Balance tank (l)
4-10 kW
≥25
12-16 kW
≥40
Cascade system
≥40*n
outdoor unit numbers
9 OVERVIEW OF THE UNIT
9.1
Disassembling the unit
Door 1
To access to the compressor and electrical parts and hydraulic com-
partment
To access to the hydraulic
compartment and electrical parts.
4/6kW
8/10/12/14/16kW
1
1
2
Содержание 20191845
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