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12
WATER HEATER CONNECTION
Use a pipe spanner for connection of a water heater. Do not apply excessive force while tightening the
water works fittings when connecting a water heater.
A pipeline system connected to a water heater is designed for normal operation in premises with
air temperatures above 0 °C! If the temperature is expected to drop below 0°C it is necessary to provide
appropriate thermal insulation or air heating at the site of unit operation.
In order to achieve maximum power the water heater should be counterflow connected (see the figure
below). To connect the water heater on direct-flow basis relocate the return heat medium temperature sensor
to the downstream side of the water heater.
All the stated calculations and diagrams are valid for counterflow connection of the water heater. In case
of direct-flow connection the water heater has lower power but higher frost-resistant properties.
Water inlet
Water outlet
Water outlet
Water inlet
Direct-flow connection
Counterflow connection
1.
2.
2.
6.
3.
4.
7.
9.
8.
5.
1. Water heater
2. Shutoff valves.
3. Circulation pump.
4. Bypass damper.
5. Boiler.
6. Heat medium regulating valve with an electric actuator.
7. Non-return valve.
8. Coarse filter.
9. Water pressure sensor (nc).
MIXING UNIT DIAGRAM
HEAT MEDIUM REGULATING VALVE ACTUATOR
