Drazice TO-20 Operation And Installation Manual - Page 3
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2.
MESSAGE FOR CUSTOMERS
The electric heater is designed for preparation of hot water in households, cottages and various welfare facilities.
It allows installation of multiple hot water withdrawal points for taking shower, bath or other usual needs. Its benefit is
that it heats up water by power in an unlimited all-day time range.
recommended temperature of 60°C is about 31 minutes.
With its design, the electric accumulation heater TO – 20 is suitable for installations in bathrooms, lavatories, kitchens or
near sanitary units of panel flats, and complies with the requirements of ČSN 332000-7-701 and ČSN 332000-5-51,with
the IP 45 protection class.
Environment Type:
It is recommended to use the product in an indoor environment with air temperatures from +2°C to 45°C and
maximum relative humidity of 80%.
3.
TECHNICAL DESCRIPTION
The heater tank is made of a steel plate and tested by 0.9 MPa overpressure. The inner surface of the tank is
provided (except the stainless coil) with anticorrosion protection of enamelled glaze.
In the bottom part of the tank there are wells for placing the heating, regulation and safety element of the water
heater (heating element with right thread G 5/4", thermostat sensor and thermal fuses). A thermometer is installed in the
top part of the heater that transmits information on heating the volume of service water. The heater tank is provided with a
highly valuable polyurethane insulation which ensures minimum heat losses.
Electric wiring is placed in the bottom part of the heater, under an easily removable guard of the heater (by
loosening two screws on that guard). Temperature of water can be set by a thermostat within the range between 0°C and
77°C, using the symbols on the thermostat selector button (Fig. 1). Cold water inflow is indicated with a blue ring, hot
water outflow is indicated with a red ring. All steel parts are protected against corrosion with paint and galvanic coating.
To ensure anticorrosion protection, the heating element head is provided with an anode rod that dissolves when the heater
is in operation, and has to be replaced after 3 years of operation (depending on the aggressiveness of water).
4.
GENERAL TECHNICAL DATA
Electric heater
Rated pressure
Capacity
Voltage / frequency
Power input
Diameter of the heater
Height of the heater
IP Protection
Weight
Time of el.heating
from 10°C to 60°C
Heat losses/energy
efficiency class
5.
PRINCIPLE OF OPERATION
The heater operates on pressure principle which means that there is constant water pressure from the water supply
conduit in the tank. If the combination faucet hot water valve is opened, water from the water supply conduit pressed out
by cold water pressure flows out of the heater.
The pressure principle allows multiple withdrawal points (Fig.4) but we recommend as short distribution as
possible in order to reduce heat losses.
TO - 20
MPa
0,6
l
20
V / Hz
230/50
W
2200
mm
500
mm
592
IP 45
kg
15
min
31
kWh/24h
0,28/F
The time of heating service water to the
3