Technical data

111
CTC EcoZenith i550 Pro
For the installer
(Y21) Diverting valves, DHW
230 V 1N~.
2.5 m cable 1.5 mm²
When relay output A18 is supplied with power, flow should be to the upper
tank for hot water charging. When it is not supplied with power, flow should
be to the lower tank
The diverting valves are connected to the following terminal blocks:
(Y21) Diverting valves, DHW
Relay output pole A18
Phase pole A19
Zero: pole A20
Check the function by test running the diverting valve in menu
“Installer/
Service/Function test”
in the control system.
In the “DOWN” position on the function menu, port
▲ should be open (turn
the knob on the motor clockwise, CW). In the “UP” position, port
■ should be
open (turn the knob on the motor counterclockwise, CCW).
The motor is fitted to the diverting valve by a screw. To unfasten the motor:
remove the knob by pulling it off, unfasten the screw and remove the motor.
To prevent faults, turn the actuator and diverting valve to the starting position
for fitting as shown in the figures. Pull out the knob on the actuator and turn
to the central position.
Port
● should be completely open; ports ■ and ▲ should be partially open.
Ensure that the groove in the white shaft coupling is in position as shown
in the figure. The diverting valve and actuator can then be fitted together as
shown in the figure, or turned in 90-degree steps relative to each other.
If ports
▲ and ■ have been shifted during the hydraulics connection, the
motor can be reconnected to change its direction of rotation. This is done
using two jumpers inside the motor. NOTE: the direction of rotation
cannot be changed by swapping the black and brown cables.
Knob
Actuator
Valve
Groove in shaft coupling