Mixer; Installing The Actuator - meibes UK Instructions De Montage Et De Fonctionnement

2. Installation and operation

2.4.2 Mixer

Mixer position
A) Mixer "open" full inlet on boiler side, no mixing on return line side
B) Mixer "closed" full inlet on return line side, no inlet on boiler side
D) Flat face on shaft end in this position
F) Associated handle position
Bypass position
A bypass is integrated into the mixer, which is closed in its delivered state (left hand image).
The bypass can be opened steplessly (right-hand image). To adjust it, the safety screw (1) needs
to be loosened by approx. 1 mm.
It makes sense to open the bypass when the heat generator temperature level provided is always much higher than the required tem-
perature in the heating circuit (e.g. wood-fired boiler in combination with underfloor heating). The continuous mixing of cold return
water lowers the supply temperature of the heating circuit. The adjustment travel of the mixer is greater to enable the servomotor to
make more accurate adjustments.
1. The heating system must be in normal operation mode (boiler temperature high (e.g. 70°C), heating circuit pump on).
2. Open the bypass to 100%.
3. Set the mixer to position A) = no mixing on the return line side.
4. Close the bypass very slowly until the maximum supply is achieved in the heating circuit
(e.g. 40°C = safety temperature limitation for underfloor heating)

2.4.3 Installing the actuator

• Rotate the mixer to the CLOSED position (flat face towards boiler supply) and remove the handoperated lever.
• Mixer right: Rotate the actuator counter-clockwise to the stop.
• Mixer left: Rotate the actuator clockwise to the stop.
• To rotate the mixer, have the arrow pointing to manual mode.
• Install the locking device / assembly kit on the mixer
• Place the actuator, including adapter, onto the mixer shaft. Align the housing according to the recess on the front insulation shell.
Secure the actuator with the screw through the hand lever to the mixer shaft.
• Switch from manual mode (position A) to automatic (position B).
• Check the direction of rotation. The mixer should rotate to the OPEN position when heat is required (to change the direction of rotation:
see "Electrical connection")
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Bypass in Bypass in
CLOSED position OPEN position