Connecting The External Probe; Connecting An External Storage Boiler - DeDietrich ZENA MS 24 MI FF Operating And Installation Instructions

26. CONNECTING THE EXTERNAL SENSOR
The wiring harness leaving the control board includes two RED wires tted with faston covers. Connect the external sensor
to these two wires.
With the external sensor connected, the "kt" curve (Graph 2) can be changed by pressing
N.B.: In case of installation in an average living unit (good perimeter insulation and radiator systems), set the "kt" climate
curve to "25".
"kt" curves

27. CONNECTING AN EXTERNAL STORAGE BOILER

Model 24 - 24FF
The DHW priority sensor NTC is supplied as an accessory.
CONNECTING THE STORAGE BOILER SENSOR
The boiler can be connected to an external storage boiler. Hydraulically connect the storage boiler as shown in g. 14.
Connect the DHW priority sensor NTC to terminals 5-6 on terminal block M2. The sensitive element of the NTC sensor must
be inserted in the special well located on the storage boiler. Adjust DHW temperature (35 °C...60 °C) by pressing
KEY:
UB STORAGE BOILER
UR HEATER
V3V EXTERNAL THREE-WAY VALVE
M2 CONNECTING TERMINAL
BLOCK
SB DHW PRIORITY STORAGE
BOILER SENSOR
MR HEATING FLOW
MB STORAGE BOILER FLOW
RR HEATING / STORAGE BOILER
RETURN
Figure 14
IMPORTANT :
Make sure that parameter
INSTALLATION INSTRUCTIONS
TM
TM = Flow temperature range
Te = External temperature
(section 21).
88
+/-
.
Te
Graph 2
71.06952.02 - EN
+/–
.