Fantini Cosmi EV91C Handleiding

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FANTINI COSMI S.P.A. VIA DELL’OSIO 6

20090 CALEPPIO DI SETTALA (MI) ITALIA

Phone no. +39 02 95682.222 Fax no. +39 02 95307006

E-mail: export@fantinicosmi.it

Web: www.fantinicosmi.it

EV91C - SLAVE

MODULE FOR

REGULATING TWO OR

OPERATION

The device uses a measuring probe to read the

temperature value of the delivery header and if the

temperature drops below a set value and for a xed

time, the device will switch on the rst auxiliary boiler

by opening the buttery valve and turning on the re-

levant burner.

If after a certain period of time one boiler is not enough,

the second one will be turned on, and so on.

When the number of turned on boilers becomes ex-

cessive, the control unit will turn them off by shutting

off rst the burner and then, after an adjustable delay,

the buttery valves.

CALCULATED BOILER TEMPERATURE

The boiler temperature calculated by the control unit

may be xed or sliding. When it is xed, the tempe-

rature value stays unvaried (i.e.: exactly like the set

value), whereas when it is sliding, the value set is

added to the highest temperature value required by

the connected slaves. It is thereby possible to regu-

late the boiler with a temperature that constantly va-

ries according to plant requirements.

N.B.: when setting the required boiler temperature

value, take into account that with the xed point regu-

lation this will be the value used by the control unit

whereas, with the sliding point regulation the value

set will represent the increase with respect to the

max. value established by the various control units

USE

The EV91C module is suitable to be used on all types

of heating plants where it is required to portion out

power over several cascaded boilers.

The module with address 0 enables full management

of two cascaded boilers by controlling automatically

both the buttery valves and the burners.

When more than two boilers are present, add as

many EV91C modules as necessary to cover sy-

stem requirements. The maximum number of EV91C

mo-dules that may be connected is four, for a total of

eight cascaded boilers.

MORE CASCADED BOILERS

Product specificaties