106
A
020009.01.010_a
17 - MAINTENANCE
17.8 - How to move
a control board
Multi-burner unit models 399 and
500 are configured to be drived by
one control board (named Burner 1
(Master)). On this board all external
devices are connected, such as:
pumps commands, LWCO, and
some internal safety devices such
as: blocked drain switch, flue blocked
pressure switch, etc.
If Burner 1 control board fails, the
complete unit stops working. If the
installer doesn’t have a replacement
part, it can replace Burner 1 control
board for another installed on the unit
and reactivate it.
To do so, operate as follows:
1. turn off the electrical power;
2. follow the steps in Section 17.2 to
remove the cover and gain access
to the internal components;
Figure 17-13 Control board “A” and complete situation of addresses and switches S4
ON position
OFF position
SWITCH S4
3. disconnect plug “B” (plug coming
from display) from plug “A” (plug
coming from “Burner 1 (Master)”);
4. disconnect all other plugs from
Burner 1 (Master) control board;
5. remove the Burner 1 (Master)
control board from the appliance;
6. follow step 3 to 5 above to remove
the board of “Burner 2”;
7. install this last control board in the
site where there where the Burner
1 (Master) control board;
8. reconnect all plugs to this board;
9. move “Switch S4” as per Figure
17-13, from OFF position to ON
position;
10. pay attention that all connections
of the board removed are not in
short circuit or in a dangerous
position;
11. electrically insulate each one of
these plugs;
12.close the external jacket of the
unit;
13. turn the electrical power on to the
unit;
14. gain access to the Factory menu,
by following Section 21 and set all
parameters by following column
“Burner 1 (Master)” (pay attention
to parameter
3050
. Because you
are moving a board to the master,
the
3050
value must be set to “0”
zero);
15. shut off electrical power to the
unit;
16. turn on the power to the unit. Now
the new Burner 1 control board
should drive the unit correctly.
399 or 500 heater
199 or 250 heater
Summary of Contents for Esteem 399
Page 3: ...3 SAFETY INSTRUCTIONS ...
Page 5: ...5 SAFETY INSTRUCTIONS ...
Page 112: ...112 17 MAINTENANCE ...
Page 116: ...116 19 SPARE PARTS Spare parts ...
Page 135: ......
