Technical data

Thermo 230 / 231 / 300 / 301 / 350 9 Repair
903
9.1.2.1 Installation of Control Unit 1572D as
Substitute for Control Unit 1572
General
Due to the progress in the development of processors
control unit 1572 can no longer be supplied.
The retrofit of control unit 1572D is performed according
to the following procedure:
The modification kit consists of:
• control unit 1572D
• igniter box
• thermo identification label
Procedure
CAUTION
Control unit 1572D may only be used in combination
with the igniter box delivered (green connector cover).
The electrical connector is coded.
1. Remove control unit according to 9.2.5.1 and
discard.
2. Remove igniter box according to 9.2.7.1 and
discard.
3. Install new igniter box according to 9.2.7.2.
4. Install new control unit according to 9.2.5.2.
5. Apply new thermo label onto existing label to indicate
retrofit.
Control unit 1572D
Control unit 1572
Thermo label
Previous igniter box
(black connector cover)
New igniter box
(green connector cover)