OSO HOTWATER Delta Twincoil DTC 200, Руководство пользователя

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4.3 Immersion heater thermostat
The immersion heater is designed as an auxiliary
heater as an emergency back-up. Power to immer-
sion heaters should not be switched on until the
unit is filled with water.
All units are fitted with one 3 kW immersion heater
which is located behind the electrical box. Alter-
native thermostats should not be used, regula-
tions require immersion heaters on unvented
cylinders to be connected with a thermal cut-out.
Follow the wiring instructions shown connecting
the live, neutral and earth as indicated. The unit
must be permanently connected to the electrical
supply through a double-pole linked switch with a
minimum break capacity of 13 amps.
Each immersion heater has a working thermostat
adjustable between 18°C - 70°C (+/- 5°C). A safety
cut-out is also incorporated within the thermostat
and will operate at 87°C (± 7°C). Should this hap-
pen, check reasons for thermal cut-out button be-
ing released and when satisfied press the reset
button.
The immersion wiring should be run through a
channel from base of cylinder to the immersion
housing . The cable should be secured using the
supplied clamps in the bottom opening of the
channel.
4.4 Indirect heating system
4.4.1 Motorized valve
To comply with regulations governing the instal-
lation of indirect unvented cylinders, a motorized
valve must be fitted in the primary pipework. Your
OSO unit has been supplied with a two port mo-
torized valve, which will act as a positive energy
cut-out should the safety cut-out operate. The
motorized valve will also control the temperature
of the domestic stored water via the cylinder ther-
mostat, which is located in the electrical box. The
unit can be installed on an “S” or “Y” plan system.
Please follow the wiring instructions carefully.
4.4.2 Digital Dual Cylinder Thermostat
The Digital Dual Thermostat has real safety and
energy saving benefits and provides accurate
temperature control. It also features a clear and
informative LCD display. Leave the cylinder ther-
mostat set at 60°C in line with current govern-
ment guidelines. Lowering the temperature will
substantially reduce the amount of usable hot
water available on a daily basis and could result
in bacterial growth unless the legionella facility
is activated. THIS FUNCTION IS DEACTIVATED
AS STANDARD. To activate turn the unit OFF
and back ON again by holding down the black
Holiday button until the display is blank (OFF),
and again until the display is on to turn ON.).
The legionella mode gives a weekly automatic
one hour “boost” to above 60°C which kills any
legionella bacteria, This function is adjustable al-
lowing the duration of the legionella override to be
adjusted from 1 to 7 days or completely disabled
to operate as a conventional Dual Cylinder Ther-
mostat.
The LCD display shows the current water tem-
perature and the user defined water temperature,
while the red LED indicates that the unit is calling
for heat. The sensitive electronic sensors operate
at a far greater accuracy than conventional ther-
mostats. The dial makes it easy to set the required
controller temperature (between 25°C and 65°C)
.The second (limit) safety thermostat is pre-set
to 80°C with a concealed manual reset, to com-
ply with building regulations. Should the safety
cut out be brought into operation, the motorized
valve will operate and close down the primary flow
to the cylinder. To reset the safety cut-out and
the motorized valve the reset button must be
pressed in.
Also see S-Plan and Y Plan Wiring page 15-16.
This product requires a fused permanent Live
and Neutral supply.