15
• Maximum 8 units can be cascaded in on 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 powering 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 controllersof slave units.
• SV1
、
SV2
、
SV3
、
P_T
、
P_M
、
P_O
、
P_S
、
P_R
、
MV1
、
MV2
、
SL1
、
SL2
、
AHS
、
TBH
、
M1M2
、
SG
、
EVU
、
C3L3
、
C2L2
、
C1L1
port are only need to be connected to corresponding ports on main board of master unit. Please refer to 6.1.1.
NOTE
• The system is with auto-addressing function. After each time powering on,The unit will read its own turntable address as the cascade
address, address 0 is the master unit, and addresses 1-7 are slave unit.
• If En error code occurs ,please check whether the communication line of the cascade unit is connected properly and whether the cascade
setting of the wire controller is correct.
• It is suggested to use the reversed return water system in order to avoid hydraulic imbalance between each unit in a cascade system.
• In the cascaded system, the system’s final outlet water temperature sensor of the system (Ttots) must be connected to the master unit,
and Ttots must be set on the wire controller to be valid.
• 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.
• Please ensure that the maximum interval between power-on times of all units does not exceed 2 minutes. If it exceeds the maximum
communication detection time of the master and slave for 2 minutes, a cascade communication failure En will be reported.
• Maximum 8 units can be cascaded in one system.
• The outlet pipe of each unit must be installed with a check valve.
CAUTION
8~10kW
• Use the correct screwdriver to tighten the terminal screws. Small screwdrivers can damage the screw head and prevent appropriate
tightening.
• Over-tightening the terminal screws may damage the screws.
• Attach a ground fault circuit interrupter and fuse to the power supply line.
• When wiring, make certain that prescribed wires are used, carry out complete connections, and fix the wires so that outside force cannot
affect the terminals.
6.1.4 Precautions on wiring of power supply
• Use a round crimp-style terminal for connection to the power supply terminal board. In case it cannot be used due to unavoidable reasons, be
sure to observe the following instructions.
- Do not connect different gauge wires to the same power supply terminal. (Loose connections may cause overheating.)
- When connecting wires of the same gauge, connect them according to the figure below.
6.1.5 Safety device requirement
1. Select the wire diameters( minimum value) individually for each unit based on the table
1
and table 2
，
where the rated current in table 1
means MCA in table 2. In case the MCA exceeds 63A, the wire diameters should be selected according to the national wiring regulation.
2. Select circuit breaker that having a contact separation in all poles not less than 3 mm providing full disconnection
，
where MFA is used to
select the current circuit breakers and residual current operation breakers:
Содержание DA-HP-16-230
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