H2O Manual | 8
4. Device description
4.1 Overview and description
Front
Figure 2 shows the front of the Synapse H2O
which has the following features:
The H2O’s front fascia consists of 4 state
indicating multicolour LEDs. Below the LEDs is
the cover over the terminal chamber where all
the cables terminate, which is secured with 2
Philips head screws.
The terminal chamber cover should only
be removed by electricians and accredited
installers who have correctly isolated the
system as described in the “Installation” section
of this manual
LEDs
The front cover of the H2O features a set of
multicolour LEDs which are designed to indicate
the state of operation or errors.
Grid
Indicates the status of the grid connection
Solar
Indicates the status of the PV / Solar connection
Status
Indicates the overall system status of the H2O
itself
Temp
Indicates the temperature status of the geyser
For more detailed information on the LED
indicators, please see the “Operation” section
of the manual.
For more detailed information on the LED
indicators, please see the “Operation” section
of the manual.
Figure 2. H2O PV geyser controller
Rear
The H2O’s rear cover features a slotted vent
system which facilitates airflow to cool the
heat-generating components. It is designed
to be mounted to the supplied bracket with
unimpeded airflow all around.
4.2 Electrical Interfaces
The H2O has 4 electrical interfaces:
Grid
This is the electrical interface to the grid supply.
This supply specification depends on the
element in the geyser being supplied. The H2O
can supply up to a 3KW element, up to 16A at
230V AC.
PV
This is the electrical interface to the PV (Solar)
supply. The H2O accepts a single string of
PV modules between 60-
220
VDC with a
maximum Isc of 10A and is connected
with “MC4” connectors. The H2O will not
convert more than 1
5
00W of PV power.
Geyser Element
This is the interface to which the geyser
connects and is marked “EL” on the main PCB.
Temperature Sensor
This is the temperature sensor which the H2O
uses to regulate the temperature of the geyser.
