Operation in the event of a fault
12
Logamatic 4321/4322 - Technical specifications are subject to change without prior notice.
75
12.2 Heating mode with manual switch
Manual switches for emergency operation are installed
in the control and the modules. The assigned pump is
started in position
3
. The mixing valve remains
disconnected and must be adjusted by hand.
Before making any settings for manual mode check the
settings on the various modules for any incorrect
settings.
If there is a fault in the controller, you can continue to
operate your heating system manually on a temporary
basis.
.
z
To safeguard DHW heating in the event of a fault, set
the manual module switches (
Æ
Fig 26) to
3
.
z
Set the boiler water thermostat (
Æ
Fig 26) to
140 °F – 194 °F (60 °C – 90 °C), for DHW heating to
140 °F (60 °C).
z
Set burner emergency switch to
W
. Burner stage 1
is always directly actuated. Burner stage 2 must be
adjusted with the manual switch on the module.
z
Set the control panel ON/OFF switch to
R
.
Fig. 26
Heating mode with manual switch
1
Manual module switch
2
Boiler water temperature controller
3
Burner emergency operation switch
4
On/Off switch
