Control Box - Riello RDB1R GRANT MILTON 20 kW Installation, Use And Maintenance Instructions

6.8.1

Control box

All the installation, maintenance and dismantling
operations should be performed voltage free.
The replacement of the Control box must be per-
formed by qualified personnel, as indicated in this
WARNING manual and in accordance with standards and
regulations in force.
To remove the active block, follow these instructions;
 Loosen the screw 1), open the protection 2) and remove all
components.
 Remove the coil 3).
 Loosen the two screws 4).
 The safety housing can be used on the burn-
ers with or without the heater.
 If the heater is damaged, introduce the bridge
7) (Fig. 16) into the safety housing so that the
WARNING
burner can operate without the heater until
the heater is replaced.
NOTE:
As a spare part, the housing is delivered with the bridge
7) (Fig. 16) in place.
If you replace a housing and if the heater is in operating state, you
must remove the bridge 7) before putting the cabinet in place.
The resistor cables and thermostat must also be connected.
20166849
Installation
4
3
4
S7735
14 GB
2 1
Fig. 15
E9151
7
Fig. 16