Technical documentation
Technical documentation
STZS ed. 06/03
26
ZEUS SUPERIOR
OUTPUTS
3-way valve relay (K3)
This relay permits powering the motor of the 3-way electric valve (VD).
It is excited by a central-heating request and remains idle with a d.h.w. request.
Control zone unit (CZ)
(optional )
This signal enables the control zone unit to know the operating condition of the appliance
(d.h.w./heating)
and, if fitted, to recognise the CAR as area 1 room thermostat
(see control
zone unit operation).
Fan relay (K1)
This single-pole relay commands the fan (MV) which is excited when operation is
required.
Modulation coil (MOD)
This is a D.C. signal that commands the modulation coil of the gas valve.
Permits changing the pressure of the gas to the burner.
Pump relay (K2)
This is a single-pole relay that powers the circulator (MP) and which is excited when
operation is required.
Remote control (CAR)
(external optional)
(see CAR operation)
This signal permits displaying on the remote control panel the boiler temperature, operation
in d.h.w. or central-heating modes, the codes of the alarms that have tripped and the
temperature read by any external probe.
Request relay (K4)
This is a single-pole relay that is excited when the burner has to be ignited.
By means of its contact, the ignition control unit is commanded (IGN. BOARD).
Reset
This signal releases the ignition control unit after the overheating or ignition failure safety
devices have tripped.
The operation is performed on the boiler control panel by means of reset button PU1 or, if
fitted, on the remote control panel
(see CAR operation).
ADJUSTMENTS
C.-heating potentiometer
(HEATING)
Permits setting the temperature of the water for central-heating use between 38ºC and 85
ºC.
Central-heating timing
(J1)
At each switch-off due to temperature being reached during central-
heating, a delay is engaged of 3 min / 30 s until the next re-ignition for
the same type of request.
absent = 30 s
present = 3 min
D.h.w. potentiometer
(D-H-W.)
Permits setting the temperature of d.h.w. between 20 ºC and 60 ºC.
Gas selector (CM3)
Depending on the position
(natural gas/LPG),
adapts the modulation parameters
to the gas for which the boiler is set.
Heating power trimmer
(HEATING POWER)
Permits regulating the output during heating phase and adapting this to the needs of the
system
(from min up to max regulated on the gas valve).
Pump switch
(CM2)
With the SUM/WINT switch in WINTER position, this enables
circulator operation in continuous mode or only at the request of the
room thermostat.
absent =
continuos operat.
present =
room thermo.
request operation
Soft ignition trimmer
(IGN. POWER.)
Permits regulating the power to the modulation coil and consequently the pressure of the
gas to the burner during the ignition phase
(from min up to 2/3 of max regulated on the
valve).
By keeping the reset button (PU1) pressed during d.h.w. or central-heating, the power to the
coil is blocked at the soft ignition setting.
