Bedienungsanleitung Wodtke Family.nrg (Seite 24 von 68) (Englisch)

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8.3.4 "Min/Max" (Eingang Min/Max) Input

- Display Indicator HM

24 V digital input (bridged, protected against po-

larity reversal): for switching the furnace output

between smallest load and the output preset on

the control board via an external, potential-free

room thermostat or heating controller. The

"Min/Max" input has priority over the "Modulation"

input and the output preset on the control board.

 Bridge closed = furnace runs at output pre-

set on control board

 Bridge open = furnace runs at minimum

(smallest load) HM

Fig. 39: min/max input

8.3.5 "Reserve" Input (Eingang Reserve)

- Display Indicator RE Er1

Fig. 40: reserve input

24 V digital input (bridged, protected against po-

larity reversal): for feedback (monitoring function)

from external devices to the furnace.

 Bridge closed = everything ok, furnace re-

sponds normally

 Bridge open = external fault, furnace does

not operate or goes to fault shutdown

Every time the furnace is started (manual start, au-

tomatic start or restart after power failure), it is

queried after 15 seconds whether the potential-

free bridge on the "Reserve" input is closed. The

furnace only operates if the "Reserve" input is

closed no later than after 15 seconds. It is then

permanently monitored during operation whether

the bridge is closed.

If the bridge is opened during operation, a fault

shutdown occurs ("RE Er1" indicator blinking in al-

ternation with "G OFF" or "Stand-By-Dot") and

heating operation is not possible. A reset of the

"RE Er1" error message and a restart as a result

is only possible if the external error is resolved and

the "Reserve input" is bridged (closed) again.

Application examples:

Interlocking furnace with ventilation system / fume

hood (furnace off if ventilation on)

Flue gas damper for flue gas / inlet damper for

combustion air (wodtke AK1)

8.3.6 "BB-S5" Input - Connection of

wodtke Touch-Control TC1 (Acces-

sory)

Fig. 41: Touch Control input

See the separate instructions for the wodtke

Touch Control TC1. The TC1 can additionally be

connected to the control board or to the furnace

alone. When connecting the TC1 to the main

board of the furnace, set the DIP switches 1+2 to

"ON."

Fig. 42: Touch Control DIP switches

The furnace automatically recognises the TC1

and then responds to its commands.

8.3.7 "Pellets Level" (Pellets Niveau) In-

put (Inactive)

Fig. 43: pellets level input

Inactive / cannot be used

8.3.8 "PC- Tool 2" Input

Fig. 44: PC Tool 2 Input

RS 232 interface with 9-pin SUB-D coupling: for

connection of the wodtke PC-Tool 2 diagnostic

system (only for specialist companies).

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