Step 4. Electrical Connections:
The actuator is fitted with 1100mm of 5-core cable for connection of the system
equipment. The installation will be simplified by the use of an electrical junction
box into which all the system equipment can connect.
The actual wiring connections will depend on the system equipment used,
following the wiring principle outlined below. The MPE 228 is double insulated
and requires no earth connection.
IMPORTANT:
The wiring must
comply with
current I.E.E.
regulations. Ensure
mains supply to all
controls is fused at
no more than 3A.
Mains isolating
switch must have
contact separation
of at least 3mm.
A
B
28MM
AUX. SWITCH
3A. 230V
ORANGE
GREY
BROWN
BLUE
STAT.
N
L
OFF
ON
System Controls To Be FUSED 3A MAX
WHITE
COM
N/C
N/O
MOTOR
MICRO-
SWITCH
Step 5. Commissioning:
When the installation is complete, filled and vented, check that the valve operates
correctly. Switch on the system controls, i.e. programmer and thermostats: The
valve should move to the open position. When fully open any equipment connected
to the valve’s auxiliary switch should operate.
Switch off the heating controls: The valve should spring return to the closed
position and auxiliary equipment should cease to operate.
Notes:
a.
Ensure that the actuator is not covered with thermal insulation, or in
contact with pipe work or other materials.
b.
When the valve is fitted in confined space, ample ventilation must be
provided to ensure that the valve is kept within the specified ambient
temperature range.
c.
The valve actuator is not designed for continuously powered operation.
