Backup Heater Thermal Protector; Built-In Backup Heater - Daikin altherma 3 M Service Manual

To remove the backup heater contactors
To install the backup heater contactors

3.4 Backup heater thermal protector

3.4.1 Built-in backup heater

Checking procedures
To perform a mechanical check of the backup heater thermal protector
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
CAUTION
Make sure to open the valve (if equipped) towards the expansion vessel, otherwise
the overpressure will be generated.
13 Open the stop valves and add water to the water circuit if needed, see
"4.3.2 Repair procedures" [
Is the problem solved?
Yes
No
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn off the respective circuit breaker of the unit and the backup
heater.
Prerequisite: Remove the required plate work.
1 Disconnect the wiring from the backup heater contactor terminals.
2 Remove the screws and remove the backup heater contactors from the switch
box.
3 To install the backup heater contactors, see
1 Install the backup heater contactors in the switch box and fix them using the
screws.
2 Connect the wiring to the correct backup heater contactor terminals.
Is the problem solved?
Yes
No
INFORMATION
It is recommended to perform the checks in the listed order.
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
4
302].
Action
No further actions required.
Return to "Checking
procedures" [
heater and continue with the next
procedure.
"Repair
Action
No further actions required.
Return to "Checking
procedures" [
heater and continue with the next
procedure.
"3.17 Plate
3 Components
|
4
112] of the backup
4
procedures" [ 117].
4
112] of the backup
4
work" [ 230].
Service manual
121