4
Avoid to make probe connections close to distribution
cables with high current loads.
Connect the different devices according to shown
diagrams.
Make sure that coupling connections are clean and
not oxidised.
Connect the control unit Fastons to the proper cou-
plings on the terminal base, pressing them down to
full bedding.
Then tighten the fastening bolt.
OPERATION TYPE SELECT SWITCH
Switch G (pg 6) shall be used for immediate selec-
tion between proportional-time control of motor-op-
erated mixing valves (wiring diagrams 1 and 2) and
burner ON/OFF control (wiring diagram 3).
CIRCULATION PUMP CONTROL
EV02F control unit is preset for automatic circulation
pump control.
If connections are carried out according to shown dia-
grams, the circulation pump will be working during the
following operating modes: AUTOMATIC 1, always
ON, always economy; and it will be off when in OFF
mode. It will also be off (with the exception of the an-
tifreeze protection) in the antifreeze operating mode
and at night in the AUTOMATIC 2 operating mode.
To make the most of the remaining heat accumulated
during the daytime mode, the pump will shutdown
(with 60-minute adjustable delay) after turning the
system off.
SERVO CONTROL OPERATION TEST
Turn control unit selector H (pg 6) to ON and OFF
positions, check for proper valve movement and com-
pare it with plate data.
When the selector is at OFF, the valve control lever
pointer shall move to COLD; when the selector is at
ON, the lever pointer shall move to HOT.
Otherwise exchange servo control connections 2 - 3
or connections 6 - 8 on the control unit base.
IN THE EVENT OF SYSTEM UNSUCCESSFUL
OPERATION CHECK THE FOLLOWING:
Supply voltage, that shall be: 230V 50Hz.
Probe circuit, by means of the tester provided for
measuring the resistance value.
Connections and settings of burner thermostats,
safety thermostats, etc.
Turn the daytime ambient temperature regulation
knob fully clockwise and counterclockwise for several
consecutive times: if the two pilot lamps turn on and
