Strebel S-CB Px 120, Руководство по установке, эксплуатации и техническому обслуживанию

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S-CB Px 120 Manual 32
7-8 GENERAL BLOCKING
A heat demand that will start the burner will be blocked when terminals 7 and 8 are not bridged. This
connection is for the use of external safety devices (terminals must be bridged for allowing burner to
fire).
9-10 EXTERNAL WATER PRESSURE SWITCH
A water pressure sensor is mounted in the boiler. As an option a water pressure switch can be in-
stalled. The sensor can be replaced by the water pressure switch, which can be wired to the terminals.
When terminals 9/10 are not bridged, the boiler will lock-out. PARAMETER: A parameter change is
needed.
11-12 ON/OFF STAT OR OPEN THERM HEATING CIRCUIT
OPTION 1: An ON/OFF thermostat can be connected. The boiler will use the set/programmed flow
temperature for the heating system when these terminals 11 and 12 are bridged.
OPTION 2: An OpenTherm (OT) controller can be connected to the terminals 11 and 12. The boiler
software will detect and use this OpenTherm signal automatically.
13-14 0-10 VDC CONTROL SIGNAL
These terminals are used for an external 0-10 VDC control signal. PARAMETER: A parameter change
is needed. NOTICE: Terminal 13 [+] (positive) and Terminal 14 [-] (negative).
15-16 CASCADE CONNECTION
These connections are used when boilers are cascaded with the internal cascade manager for control-
ling the total cascade. NOTICE: Connect all terminals 15 and all terminals 16 together, do not switch
between these terminals.
17-18 LOCK-OUT OR PUMP ON/OFF
This contact is N.O. (normally open). When the unit is in lock-out this contact will close.
This contact can also be used for the switching of a pump with a separate control connection, in which
case a parameter change is needed.
19-20 BURNER BURNING OR EXTRA BOILER OR PUMP ON/OFF
This contact is N.O. (normally open). When the unit starts the burner and detects the flame, this con-
tact will be closed. This contact can also be used to control an external (extra) boiler, or for the switch-
ing of a pump with a separate control connection. In the latter two cases a parameter change is need-
ed.
21-22 BURNER DEMAND OR PUMP ON/OFF
This contact is N.O. (normally open). When the unit receives any heat demand this contact will close.
This contact can also be used for the switching of a pump with a separate control connection, in which
case a parameter change is needed.
23-24-25 CH SYSTEM PUMP P3
Connection for a central heating system pump (P3).
NOTICE: The power of this pump P3 combined with the power of pumps P1 (connections 30-31-32)
and P2 (connections 26-27-28-29) may not exceed 350 W.
Nominal pump current of P3 may not exceed 2 A, therefore its power may not exceed 460 W, cf. § 7.2.
26-27-28-29 DIVERTOR VALVE CALORIFIER
When using a calorifier/hot water tank, a 3-way valve or a pump (P2) can be used to divert hot water to
the heating coil of the calorifier/tank. This 3-way valve will open, when the hot water storage
tank/calorifier has a heat demand. PARAMETER: A parameter change is needed.
28 = L2 wire (heating position); 29 = Neutral wire; 30 = Ground wire; 31 = L1 wire (hot water position).
The inrush current of the 3-way valve may not exceed 3 A, see also § 7.2.
27-28-29 CALORIFIER PUMP P2
When using a calorifier/hot water tank, a 3-way valve or a pump (P2) can be used to divert hot water to
the heating coil of the calorifier/tank. This pump will start when the hot water storage tank/calorifier
creates a hot water demand. PARAMETER: A parameter change is needed.
Nominal pump current of P2 may not exceed 2 A, therefore its power may not exceed 460 W, see also
§ 7.2.
30-31-32 FIXED POWER SUPPLY FOR MODULATING BOILER PUMP 230V~50Hz
Connection for modulating boiler circulation pump (P1). The pump is powered permanently and modu-
lated by the PWM signal of the burner controller.
33-34-35 MAIN POWER SUPPLY TO BOILER 230V~50Hz
The power supply connection of the unit. 33 = Phase wire; 34 = Ground wire; 35 = Neutral wire.