45
10 - INSTALLATION - Electrical connections
Figure 10-4 Multiple water heaters conceptual scheme
heater #1
heater #2
heater #3
heater #4
Cold
Water
10.2 - Connecting
the heater in
cascade
Heaters can be installed in cascade
with a configuration like in Figure 10-
4.
Many other configurations can be
done (ask to the heater manufacturer
for conceptual drawings).
For water, gas, flue exhaust and air
intake connections, ask for conceptual
drawings to the manufacturer.
Hot
Water
CAUTION!!!
For this appliance the following terminals are “NOT
APPLICABE” (See Figures 10-2 and 10-3):
Terminal “12” - Tank Sensor - (NOT APPLICABLE)
Terminal “13” - Tank Sensor - (NOT APPLICABLE)
Terminal “14” - Outdoor Sensor (OS) - (NOT APPLICABLE)
Terminal “15” - Outdoor Sensor (OS) - (NOT APPLICABLE)
Terminal “24” - Cascade header Sensor - (NOT APPLICABLE)
Terminal “25” - Cascade header Sensor - (NOT APPLICABLE)
Terminal “28” - Bus (cascade) - (NOT APPLICABLE)
Terminal “29” - Bus (cascade) - (NOT APPLICABLE)
Terminal “30” - Bus (Master) - (NOT APPLICABLE)
Terminal “31” - Bus (Master) - (NOT APPLICABLE)
Terminal “105” - Heating pump Line (max 3A) - (NOT APPLICABLE)
Terminal “106” - Heating pump Neutral (max 3A) - (NOT APPLICABLE)
Terminal “Ground” (between “106” and “107”) - (NOT APPLICABLE)
Terminal “107” - DHW pump Line (max 3A) - (NOT APPLICABLE)
Terminal “108” - DHW pump Neutral (max 3A) - (NOT APPLICABLE)
Terminal “Ground” (between “108” and “109”) - (NOT APPLICABLE)
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