Panasonic Aquarea Tank Duo GH 200 Design, Installation & Servicing Instructions page 14

INSTALLATION
Temperature/pressure Relief Valve
This safety device is also pre-set at the factory and relieves before the temperature
reaches 100°C. It is also a Pressure Relief Valve, and is pre-set to 6 bar.
E
L
Immersion Heater Wiring
Immersion Heater
The immersion heaters fitted to our units are 3kW 240V ~AC. Check that the mains
supply conforms to this, and all external wiring conforms to the most recent
revision of the IEE wiring regulations. An Incoloy element is used on this product for
standard domestic use and water conditions, use our Titanium elements in all other
circumstances.
The immersion heater is fitted into the hot water cylinder using an O-ring. After the
unit is filled with water check for leaks to determine if the O-ring has sealed and
tighten carefully using the appropriate tool. To prevent damage to the O ring do not
use excessive force to tighten the immersion heater.
The immersion heater is supplied with a thermostat which has been tested
for operation in the cylinder and complies with the European directives for
Electromagnetic compatibility and radio interference. It is Rated at 16 Amp 250V ~AC.
The immersion thermostat has two terminals A and B. The Live (brown) wire should
be connected to terminal A and the Neutral (blue) wire should be connected to
terminal B. It has been our experience that Crimp terminals make better connections.
The immersion heater must be fully earthed (earth post) and connected via a double
pole isolator switch having a contact separation at least 3mm, see diagram above.
Danger of electrocution: before making any adjustments to the thermostat
isolate the immersion heater from the mains electricity supply at the fuse spur
unit.
The immersion heater thermostats incorporate a manual reset safety/overheat cut
out thermostat. Should this operate, investigate the cause for the operation cut out
before pressing the red reset button labelled safety. If there is no apparent fault adjust
the control setting down slightly to prevent nuisance tripping.
If another heat source is used to heat the cylinder and this is allowed to raise the
water temperature excessively then the overheat thermostat will trip. This is likely
on solar thermal products when the solar thermostats are set at high temperatures.
The Direct cylinder is intended to be heated from an off peak supply using the lowest
immersion heater(s) and boosted via the upper immersion heater from an on peak
supply. Suitable controllers are available to control this operation effectively.
INSTALLATION
Thermostat Type TSR fitted in the
Direct cylinders; is supplied set at
62°C ± 3°C. Position 4 is 55°C ± 3°C
N
and position 5 is 68°C ± 3°C.
All Aquarea Duo cylinders are fitted with a 3kW
immersion heater so that the store temperature
can be raised above that which the heat pump
provides, to boost the hot water performance
if necessary and to protect against legionella
eg. following the time parameters set on the
Aquarea remote control.
Control/overheat Dual Thermostats
Care must be taken to ensure that the solar
probes are fully inserted into the pockets
provided.
Page 14