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LR, LRK, LR-NT, LRK-NT 21 - 32
We reserve the right to make changes to dimensions and construction 31 edition 30.10.2007
© Copyright YGNIS AG CH-Ruswil
5. Boiler control panel
5.1. Description
A wide range of system controls has been designated for Pyronox LR boilers. In the basic version, the panel
allows for operation with a two-stage burner. The enlarged modular version of the control system allows users to
freely choose the best accessories for their system among a range of modern digital microprocessor governors for
boiler, burner, heating line and consumable water control. The panels are ready to be connected. All operating
condition and failure data go through the terminals. The steel plate frame is ready for installation on the boiler lid
(LR 21-26), respectively either on the left or right side of the boiler (LR27-32).
The wiring diagram including all the options as ordered is joined with the control panel.
5.2. Basic equipment
- Burner ON/OFF switch with indicator lamp
- Burner / boiler 6,3 amp delayed-action fuse
- Safety temperature limiting device
- Two-stage thermostat burner stage 1 and 2
- TÜV overheat test switch
- LED for boiler overheat
- LED for burner failure
- LED for external failure
- Thermometer
5.3. Optional features
- Counter hours 1st and 2d stage
- Counter impulses 1st and 2d stage
- Relays for external indication of boiler overheat, burner failure, burner stage 1 and 2, external failure
- Module burner reset
- Module summer/winter mode
- Connections for three-phase current burners and pumps
5.4. Governor types
RDO 243 governor
Heating governor providing burner regulation for single- or two-stage burners or modulating burners for 1 mixing
circuit and 1automatic water loading device.
RDO 353 governor
Heating and master cascade governor providing regulation for single-, two-stage or modulating burners, for 1
mixing circuit, 1 automatic water loading device and DHW circulation pump. 6 other mixing circuits can be added
for use by means of additional modules RZM 510, three other automatic water loading devices by means of
additional modules RZM 515 and the cascade control with three other boilers by means of additional modules
RZM 530.
RDO 383 governor
Heating and master cascade governor providing regulation for single-, two-stage or modulating burners, for 2
mixing circuits, 1 automatic water loading device and DHW circulation pump. 6 other mixing circuits can be added
for use by means of additional modules RZM 510, three other automatic water loading devices by means of
additional modules RZM 515 and the cascade control with three other boilers by means of additional modules
RZM 530.
5.5. Cable sets
Depending on the order, burner cables with 7 and 4-position normed connectors (DIN4791) and a connection
cable for acknowledging faults of the burner are supplied with the panel.
33


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