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15-5. Connecting a remote water heater (for LUNA HT 1.120 - 1.240 - 1.280 models)
LUNA HT 1.120 - 1.240 - 1.280 models are designed for connection of a remote water heater since
they are fitted in the factory with a motor-operated three-way valve.
Make the water connections to the water heater as shown in figure 13.
Connect the NTC domestic hot water priority probe supplied as an accessory to terminals 9-10 of
terminal board M2 in figure 11, first removing the electrical heating element fitted.
The sensor element of the NTC probe must be fitted into the well provided on the water heater.
The domestic hot water temperature can be set and the timed domestic hot water program selected
directly on the boiler control panel as described in the instructions provided for the user in this
manual.
Figure 13
0207_0904
KEY
UB:
domestic hot water heater unit (storage tank)
UR:
central heating unit
V3V:
three-way valve
M2:
connection terminal board
SB:
domestic hot water heater priority sensor
MR:
central heating delivery
MB:
domestic hot water heater delivery
RR:
central heating/boiler return
