18
6
Circulating pumps
The system can be equipped with a low-energy pump, for example, Wilo Yonos Para RS 15/7,5. Operation of the pump is controlled in
accordance with electric connection of the boiler with the chosen regulation.
1.
The standard fulfillment of the boiler (without regulation) - after the boiler is switched-on with help of the main switch, the circulating pump
is in operation (provided the pump thermostat is not connected).
2.
In case of equipping the boiler with Honeywell CM 707 programmable regulator - the pump is controlled by the room thermostat.
3.
In case of connecting a water stack heater - the pump is controlled by the heater thermostat; and after its switching-off, the controlling
function is being transferred to the room thermostat.
4.
In case of equipping the boiler with an equitherm regulator - the pump operation is controlled according to the regulator program.
Fig. №. 14
Characteristics of Wilo Yonos Para RS 15/7,5 pump
7
Stack heaters for domestic hot water
7.1
Technical data of recommended domestic hot water heaters
Tab. №. 4
Thermal-technical parameters of VIADRUS OV 100 L heater
Heater volume
l
100
Heating power of the heater (the heating coil)
kW
23
Heat transfer surface of the heating insertion
m
2
~ 0,9
Connections: - heating water
Js
3/4
“
- domestic hot water
Js
1/2
“
Heater dimensions: - height
mm
886
- width
mm
574
- depth
mm
587
Weight
kg
60
Nominal overpressure of the heating body
kPa (bar)
400 (4)
Maximum working overpressure for hot water
kPa (bar)
600 (6)
Settings range
°C
0
– 90 °C ***)
Time of water heating from 10 °C to 60 °C
(boiler power 26.5 kW and water temperature 85 °C) *)
min
14
Water flow rate (boiler power 26.5 kW) **)
l/hour
610
Connecting voltage
1/N/PE 230 V AC 50 Hz TN-S
Electric cover
IP 40
Environment
normal, according to ČSN 33 2000-1 ed.
2
