First EMV100 800 Series Manual page 93

When the temperature of the source exceeds the temperature
around the exchanger for set difference, the thermostat opens
the valve (EMV110..) and activates the pump.
Thermostat closes the valve and switch of pump, when tem-
perature difference is lower than pre-set value. Thermostat also
switches off a pump if pre-set temperature is reached in hot
water tank.
When pump operates for primary heating circuit (collectors),
operation of after-heating circuit is prevented. This assures
maximum energy savings during seasons and this also the
main role of solar systems.
For those applications you need four sensors. Two of them are
mounted into individual heating sources and two into upper
half of individual exchangers in hot water tank. T1 and T2 are
designed for primary (main) heating circuit which heats entire
quantity of water in hot water tank (lower exchanger), where T1
is a sensor of heating source (generally collectors) and T2 is a
sensor in lower part of hot water tank. T3 and T4 are designed
for additional, i.e. after-heating circuit which additionally heats
water in hot water tank (upper exchanger). T3 is a sensor of
heating source (generally boiler) and T4 is a sensor in upper
part of hot water tank.
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 pump of secondary heating circuit
5. LED indicator for pump of primary heating circuit
USE OF SELECTOR SWITCH:
With selector switch (1) you select one of the following modes of operation:
OFF Irrespective of temperature values
both pump are off.
AUTO Automatic operation of thermostat
(normal operation)
ON 1 Irrespective of temperature values the pump of pri-
mary (collector) circuit is on. This mode is designed for testing
purposes, servicing and in case of troubles.
ON 2 Irrespective of temperature values the pump of sec-
ondary (boiler) circuit is 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!
Temperature setting of domestic
hot water tank
Temperature setting of hot water tank
With knob (2) you can set max. tempera-
ture in water tank between 10°C and 90°C.
When the temperature is reached, thermo-
stat deactivates pump and closes
motorized ball valve regardless the
temperature of heating source.
If hot water is used by the appliance with limited max. tempera-
ture of inflow, this setting is very useful.
Difference setting of primary
heating circuit ( Δ Δ Δ Δ Δ T1)
With knob (3) you can set temperature differ-
ence 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 tem-
perature 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.
Difference setting of secondary
heating circuit ( Δ Δ Δ Δ Δ T2)
With trimmer on electronic circuit you can set temperature dif-
ference of secondary heating source (boiler, ...) and in user (hot
water tank) between 0K and 15K.
DTC 200
93
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