R410A DC Inverter VRF V4 Plus W Series 50Hz
MCAC-VTSM-2016-04
24 Specification & Performance
5.4.2 Water pump ON/OFF signal wiring
1)Each unit has configured a dry contact terminal for central control of the water pump (see Fig.3-3),this
terminal cannot be connected to power terminal of the water pump directly, only should be connected to the
control terminal of the water pump starter.
2)When the water pump ON/OFF signal wire has been connected to strong current, it should be wired the
signal wires along with other strong current wires; when it has been connected to week current, it should be
wired the signal wires along with the week current wires.
3) When the water pipeline has a single system, the water pump ON/OFF signal wire should be connected to
the XT3 terminals in the main unit electric control box. When the water pipeline has several systems, the
water pump ON/OFF signal should be controlled by the main unit centralized controller. The wiring of main unit
centralized controller.
Water pump ON/OFF signal output
Group control all the main units in the same water system
XT3
XT2
(K1 K2 E)
(K1 K2 E)
(K1 K2 E)
(K1 K2 E)
(K1 K2 E)
(K1 K2 E)
(K1 K2 E)
Water pump
N
P
~
L
P amplification
PUMP
Main unit
centralized controller
Water pump starter
Main unit
(master unit)
Main unit
(slave unit)
Main unit
(slave unit)
Main unit
(master unit)
Main unit
(slave unit)
Main unit
(slave unit)
(All shield terminals of shield wires
connect to COMM terminal )