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3.3 - INTRODUCTION OF THE ELECTRONIC PANEL BOARD TYPE 30688
The ELLPREX boilers can be supplied with
an electronic panel board complete with a digital
outer compensator with built-in microcomputer
and permanent memory.
The management of the boiler is made through
the outer compensator which, in addition to the
burner and pump control, can control also two
different heating zones.
The automatic operation is made on the base
of the data detected by the boiler, D.H.W.
storage tank, outer, room and flow temperature
sensors. This last sensor will be fitted only
when a mixing valve is fitted.
The outer compensator is capable to control
several heating system configuations:
- one direct zone C.H. system without mixing
valve: the flow sensor has not to be fitted; the
outer compensator controls only the pump of
the C.H. system No. 1.
- one zone C.H. system with mixing valve: the
flow sensor has to be fitted downstream the
mixing valve; the outer compensator
controls the pump of the C.H. system No. 2.
- two zone C.H. system: one direct and one
with mixing valve; the outer compensator
controls the direct pump of the C.H. system
No. 1, the mixing valve and the pump of the
mixed C.H. system No. 2.
The outer compensator sensors (boiler,
storage tank, outer and flow) are included in
the supply; the room sensors for the C.H.
systems No.1 and No. 2 are optionals.
The mixing valve and the relevant motor are
not supplied by Unical.
When the room sensor is not fitted (it is
optional), the room temperature is determined
and controled only by the heating curve of the
outer compensator program.
The electronic panel board type 30688 is
supplied as standard with the outer
compensator, type 30680, already fitted.
If two boilers in cascade are fitted, please
get in touch with our after sale service.
3.4 - PANEL BOARD TYPE
30688 - FUNCTIONS
DESCRIPTION
Through the main switch 11 the panel board
and the ancillary equipments connected to it
are powered.
The switches 12 and 13 control the
respectively the burner and the heating pump
of the mixed zone.
The switches 14 and 15 control the heating
pump of the direct zone and the storage tank
pump.
Through the thermostat 32 the boiler working
temperature is adjusted.
The minimum temperature thermostat, placed
under the plug 34 keeps OFF the heating
pump during the starting of the boiler till the
boiler temperature reaches 30°C.
On the supply line to the boiler panel board a
double pole fused switch has to be fitted.
31 High limit thermostat
32 Working thermostat
41 General fuse
42 Boiler thermometer
fig. 32
11 Illuminated main switch
12 Burner switch
13 C.H. pump switch for mixed zone
14 C.H. pump switch for direct zone
15 D.H.W. tank loading pump
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