H2O Manual | 10
Existing installations – H2O to geyser supply
Run a new cable of suitable cross-section from
the 2 terminals marked “EL” and earth terminal
of the H2O’s PC board (in the Blue block in
Fig. 4) to the location where the first cable
was disconnected from the Geyser’s terminal
chamber or the local isolator, depending on local
regulations. Ensure that the Live, Neutral and
Earth conductors are all connected securely and
according to the labels on the Synapse H2O and
the Geyser.
New installations - AC supply to H2O
Connect a supply from a suitably sized dedicated
circuit breaker in the distribution board with a
suitable cross-section cable to the H2O. This
cable is the power supply to the H2O and is
terminated at the “L”, “N” and earth terminals on
the PC board (in the red block in Fig. 4). Ensure
that the Live, Neutral and Earth conductors are
all connected securely and according to the
labels on the PC board.
New installations – H2O to geyser supply
Run a cable of suitable cross-section from the
terminals marked “EL” and earth of the H2O’s
PC board to the Geyser’s terminal chamber
or the local isolator, depending on local
regulations. Ensure that the Live, Neutral and
Earth conductors are all connected securely
and according to the labels on the H2O and the
Geyser.
Ensure that the Geyser is fully earthed,
according to local regulations.
Ensure that the geyser’s thermostat is
correctly connected into the circuit, as per the
manufacturer’s instructions.
This is an important
safety device and may not be omitted.
DC PV supply
The DC supply shall be isolatable locally at the
Figure 3. H2O Electrical Installation Overview
The H2O shall be installed with all the relevant
electrical protection and isolation. In particular,
AC and DC protection and local isolation is
required, as well as AC and DC surge protection.
Figure 3 shows a typical electrical layout.
Figure 4. H2O AC input (left) and Element output (right)
Existing installations - AC supply to H2O
Remove the power cable feeding the existing
geyser from the terminations inside the geyser’s
terminal chamber or local isolator at the geyser,
according to local regulations. This cable then
becomes the power supply to the H2O and is
terminated at the “L”, “N” and earth terminals on
the PC board (the red block in Fig. 4). Ensure
that the Live, Neutral and Earth conductors are
all connected securely and according to the
labels.
