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5 zone anti-freeze protection (mczn module) – EVCO EPH4DXP1CT Installer manual User Manual

Page 60

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Evco S.p.A.

c-pro 3 CLIMA sistema | Installer manual ver.1.1 | Code 144CP3CSE114

page 60 of 74

8.1.4.2

Variation of the zone work set-point for "manual compensation" (MCZN

module)

By activating the work set-point variation function for “manual compensation” by installing a remote set-point variator

it is possible (e.g. the EVTP010V01 accessory), to allow the final user to increase/lower the active zone work set-point

within the pre-established limits, by simply acting on the pocoveriometer distinguished by the + / - indication.

Remote set-point variator

EVTP010V01

The system installer/maintenance technician must enable and set the function features from parameter, i.e.:

-

set the room work set-point minimum and maximum variation values

-

enable and set the presence of the remote set-point variator

-

calibrate the movement of the potentiometer for 3 basic positions, i.e. maximum negative variation, neutral

(0°C variation) and maximum positive variation.

Calibration procedure

-

access the remote set-point variator calibration screen

MCZN: Installer Menu

Zone A(B) Zone A(B) setup

R.Set calibr.

-

position the cursor on position P1

-

move the pocoveriometer into the negative set-point maximum variation position (the display will show the

number of points read by the pocoveriometer)

-

press ENTER to calibrate the first calibration point

-

position the cursor on position P2

-

move the pocoveriometer into the neutral position (variation of 0°C set-point, the display will show the

number of points read by the pocoveriometer)

-

press ENTER to calibrate the second calibration point

-

position the cursor on position P3

-

move the pocoveriometer into the positive set-point maximum variation position (the display will show the

number of points read by the pocoveriometer)

-

press ENTER to calibrate the third and last calibration point

8.1.5

Zone anti-freeze protection (MCZN module)

During the winter functioning mode when the system is not running (i.e. in OFF state or with time bands enabled but

in a day when the system is off), however an zone anti-freeze protection control remains active

If the zone room temperature goes below the anti-freeze set-point, the system will however function (activating the

zone manifolds, the circulation pump of the associated delivery line, the heat pump or the boiler if necessary), in order

to guarantee a minimum temperature in the room and so as not to risk compromising the good functioning of the

system due to frozen piping.

This manual is related to the following products: