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20 | Mounting
Uni 3000 F6 720 812 900 (2014/10)
Screw the base of the control unit to the control unit holder with
2 sheet-metal screws.
Fig. 20 Fitting the control unit for boiler sizes 420 kW to 820 kW
[1] Cover
[2] Flexible hooks
[3] Rectangular openings in the control unit holder
[4] Locking tabs
[5] Oval holes in the control unit holder
[6] Cable feed in the control unit holder
[7] Holes for self-tapping screws
4.7.2 For boiler sizes 1040 kW to 1850 kW
In Fig. 21, page 20, the control unit is shown from the rear.
Undo both screws from cover [1]. Lift off cover [2] ( Fig. 20).
Remove both plugs ( Fig. 21, [2]) from the control unit.
Place the control unit ( Fig. 21, [4]) on the studs of the control unit
holder on the side of the boiler.
Secure the control unit by screwing screws into the mounting
holes [3] on the control unit holder.
Fig. 21 Fitting the control unit for boiler sizes 1040 kW to 1850 kW
[1] Screws
[2] Plug
[3] Mounting Holes
[4] Control unit
4.7.3 Making the electrical connections
Knock out or cut out the appropriate parts from back panel [1]
( Fig. 22) as required.
Make the plug-in connection in the control unit in accordance with
the labelling on the terminal strip.
Route the burner cable to the control unit ( Chapter 4.8, page 21).
Connect the burner cable to the control unit in accordance with the
labelling on the plug-in connector strip.
Route the sensor leads to the control unit ( Chapter 4.8, page 21).
Connect the sensor leads to the control unit in accordance with the
labelling on the plug-in connector strip.
Route the electrical cables relevant to the heating system (for
example, sensors, pumps, actuators) to the control unit.
Make the on-site connections on the control unit in accordance with
the labelling on the plug-in connector strip.
Make on-site electrical connections for the heating system to the
appropriate plug-in connectors according to the connection diagram
( control unit documentation).
Refit back panel ( Fig. 22) to the control unit.
Fig. 22 Preparing the cable entry
[1] Control unit back panel
1
2
45637
6 720 615 362-18.2O
6 720 806 032-48.1ITL
2
3
4
1
DANGER: Risk to life through electric shock.
Prior to opening the appliance, isolate all electrical
connections and secure against unintentional
reconnection.
Carefully route the cables/leads and capillary tubes.
Only carry out electrical work if you are suitably
qualified person. If you are not suitably qualified,
arrange for a suitably qualified person to make the
electrical connections.
Observe all relevant electrical regulations.
DANGER: Risk of fatal injury and fire from hot
components.
Hot components can damage the cabling.
Secure cable sufficiently and route in the provided
cable holding systems where necessary.
Route cables with a sufficient clearance from hot
components.
The positions of the terminal strips on control units are
not identical. The terminal strip is easy to identify after
the control unit has been opened.
The labelling of the terminal strip in the various control
units is identical.
6 720 615 362-19.3T
1
20


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