1. ISOLATING THE MASTER BOILER *
Master boiler: Disconnect all terminal plugs
Slave 1 boiler: Connect all of the terminal plugs
All remaining Slave boilers: No Change
2. ISOLATING A SLAVE BOILER IN THE CHAIN (EXCEPT THE LAST ONE) *
Master boiler: No Change
Slave boiler to isolate: Disconnect Terminal plugs 1-13 and insert jumpers between:
• Terminal 14-15
• Terminal 16-17
• Terminal 18-19
All remaining Slave boilers: No Change
3. ISOLATING THE LAST SLAVE BOILER *
Master boiler: No Change
Slave boilers up to Slave N-2 boiler: No Change
Slave N-1 boiler: Disconnect Terminal 20 and connect Terminal 19
Last Slave boiler in chain: Disconnect all terminal plugs
4. ISOLATING THE MASTER BOILER AND A SLAVE BOILER *
Master boiler: Disconnect all terminal plugs
Slave boiler out of order: Disconnect Terminal plugs 1-13 and insert jumpers between:
• Terminal 14-15
• Terminal 16-17
• Terminal 18-19
First working boiler in chain: Connect all of the terminal plugs
All remaining Slave boilers apart from last: No Change
Last working Slave boiler: To be set up as instructed for the last Slave in
Section 2.19.2
Note:
The isolated boiler becomes invisible to the controller.
The rst working boiler becomes the Master Boiler.
a) Boilers out of order after the new master need to have 3 jumpers inserted between:
• Terminal 14-15
• Terminal 16-17
• Terminal 18-19
b) Additionally Terminals 1-13 need to be disconnected.
c) Ensure Terminal 20 is connected and Terminal 19 is disconnected on the last working boiler.
* For details of terminal disconnection and jumper insertion, refer to Figs 7, 8 & 9 on page 24 of this manual
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