Accessories For Pyrocontrol Output Management; Cylinder Management 5 Sensors (Qm); External Requirement On/Off; Operating Message Zero Volt - Viessmann KOB PYROTEC Technical Manual

Control unit
(cont.)

3.3 Accessories for Pyrocontrol output management

Cylinder management 5 sensors (QM)

Part no. 7387 809
Modulating output operation is optimised with the use of a DHW cyl-
inder. Short term heat demand peaks are also covered. The temper-
ature sensors record the heating of the cylinder. The specification for
the charging level of the cylinder is weather-compensated and carried
out via the external sensor. The combustion output is matched to the
charging level of the cylinder.

External requirement on/off

Part no. 7387 986
Input for automatic switching on/off of the system via external zero volt
N/O contact.

Operating message zero volt

3
Part no. 7387 987
Issue of the operating condition "Load operation" (zero volt output) to
higher control technology.

Output signals 0-10 V

Part no. 7387 835
Issue of boiler output as voltage signal and connection preparation to
receive a maximum limit of the boiler output included in standard deliv-
ery.
■ Issue of the output signals.
■ Receipt and processing of an external output restriction.
■ Receipt and processing of an external output restriction.
– Incandescent bed
– Output operation

Requirement, additional heat source KP0

Part no. 7387 973
Function
The additional heat source supplies, individually or jointly with the
boiler, heat to the cylinder, which is designed as a low loss header.
Taking into consideration the inertia of the boiler, control is carried out
so that the additional heat source covers the peak load and the boiler
covers the base load. In the operating phase of the additional heat
source, the boiler pump is operating and the motorised shut-off device
is open.
Standard delivery:
■ Sub-menu on touch-screen
■ Motor protection, boiler circuit pump, additional heat source
■ Control of motor, shut-off device
■ Zero volt contact for the control of the burner
■ Sensor PT-1000 incl. sensor well ½" x 280 mm (installation in low
loss header - system sensor)
Note
The electrical output data of the on-site boiler pump (kW, Ampere,
Volts) must be given.
16
Standard delivery:
■ 5 additional sensors PT-1000 with sensor well 1/2" x 280 mm
■ 1 weather sensor PT-1000
Note
For external requirement, an automatic ignition system is necessary
Note
Note: The installation of "Output signals 0 – 10 V" downstream of QM
wood heating plants is possible irrespective of additional control mod-
ules to be used.
PYROTEC