First EMV100 800 Series Manual page 78

DTC 200/2G
1st WAY OF USE
HEATING THE DOMESTIC HOT WATER FROM ONE HEATING
SOURCE (SOLAR COLLECTORS, BOILERS, HEAT PUMP...)
WITH CONTROLLING THE HEATING SOURCE (BURNER).
OPERATION
DTC 200/2G single differential thermostat measures the tem-
pera ture of heating source (collectors, boiler, ...) and in user
(hot water tank).
Heating effect is provided, when heating source temperature
is higher than the temperature of the user (water in hot water
tank). Consequently minimum difference should be 3K-5K. Rec-
ommendable minimal value is 5K.
When the temperature of the source exceeds the temperature
around the user for pre-set difference opens the electric motor
actuated ball valve and switches the pump.
The thermostat switches off the pump if pre-set temperature is
reached in hot water tank (ad justable from 5° to 85°C).
If it's need for heating the hot water tank and the temperature of
heating source (boiler) is to low, then thermostat switch on the
burner of the boiler and when the conditions of the difference is
assured, pump is switch on.
The burner is always on, when the heating is needed.
CONTROL PANEL:
LEGEND:
1. Selector switch for choosing the operation
2. Knob for setting temperature in DHWT (domestic hot water
tank)
3. Knob for setting temperature difference of heating source
(collectors, boiler, ...) and in user (hot water tank).
4. LED indicator for burner operation.
5. LED indicator for pump operation.
Use of selector switch:
With selector switch (1) you select one of the following modes
of operation:
O F F
the pump is off.
AUTO
(normal operation)
ON 1 Irrespective of temperature values the pump is on. This
mode is designed for testing purposes, servicing and
in case of troubles.
ON 1+2 Irrespective of temperature values the pump and
burner are on. This mode is designed for testing
purposes, servicing and in case of troubles.
Mode OFF doesn't enable galvanic separation from
mains. When replacing the pump, disconnect supply
voltage!
78
page
Irrespective of temperature values
Automatic operation of thermostat
TEMPERATURE SETTING OF HOT WATER TANK
With knob (2) you can set max. temperature in
water tank between 5°C and 85°C.
When the temperature is reached, thermostat
deactivates pump and close motorised ball valve
regardless the temperature of heating source.
If hot water is used by the appliance with
limited max. temperature of inflow, this
setting is very useful.
DIFFERENCE SETTING
With knob (3) you can set temperature
difference of heating source (collectors,
boiler, ...) and in user (hot water tank)
between 0K and 15K.
Heating effect is provided, when heating source
temperature is higher than the temperature of
the user (water in hot water tank). Consequently
minimum difference should be 3K-5K.
The difference is set in relation to the volume of heat losses of
the system which depend on lengths of pipes from source to the
water tank and on pipeline insulation.
2nd WAY OF USE
HEATING THE DOMESTIC HOT WATER FROM ONE HEATING
SOURCE (SOLAR COLLECTORS, BOILERS, HEAT PUMP...)
WITH ADDITIONAL HEATING WITH ELECTRICAL HEATER.
Differential thermostat controls the electric motor actuated
ball valve (EMV 110..) and the circulation pump. In case that
the primary heating source (solar collectors, boilers...) has not
enough energy, water in water tank is heated with electrical
heater.
OPERATION:
DTC 200/2G single differential thermostat measures the
temperature of heating source (collectors, boiler, ...) and in user
(hot water tank).
Heating effect is provided, when heating source temperature
is higher than the temperature of the user (water in hot water
tank). Consequently minimum difference should be 3K-5K.
Recommendable minimal value is 5K.
When the temperature of the source exceeds the temperature
around the user for pre-set difference opens the electric motor
actuated ball valve and switches the pump.
The thermostat switches off the pump if pre-set temperature is
reached in hot water tank (adjustable from 5° to 85°C).
If it's need for heating the hot water tank and the temperature
of heating source (boiler, collector) is to low, then thermostat
switch on electrical heater. Electrical heater heats water to desire
temperature.
Electrical heater is active, when the primary heating source is
inactive - they never work at same time. Priority has main heating
source (collector, boiler, ...).
CONTROL PANEL: