Electrical Connection - Mitsubishi Electric ecodan PUHZ-W50VHA2 User Manual

Electrical Connection

Immersion Heater Function
FTC2 has the capability to directly control the immersion heater used for periodic pasteurisation of the domestic
hot water storage cylinder. The cylinder target temperature and the immersion heater frequency are selectable
via DIP switch settings as displayed later in this manual (page 37). Switching of the immersion heater is performed
by a separate relay box, this in turn energises a Horstmann
to override the specified FTC2 immersion heater control method in the unlikely event of a failure. The FTC2 can
also be used with this setup to control inline boost heaters should this function be required.
Alternatively the immersion heater may be controlled separately. If direct control is not required then DIP switch
SW1- 4 should be turned OFF and the immersion can then be controlled via its own weekly timer as with FTC1.
Relay Box Wiring Diagram
Horstmann Electronic Boost Control Module Wiring Diagram
®
20
INSTALLATION
® electronic boost control module which has the ability
19
1. L to L
out out
2. L to L
in in
3. Earth
4. Neutral
5. L
in
Fig. 2.5
Fig. 2.6