28
6.
Circulation pumps
To the boiler you can order a three-speed circulation pump Grundfos UPS 25-40. The pump operation is
controlled according to electric interconnection of the boiler with selected regulation:
1. Standard boiler design (without regulation) – after having switched on the boiler using the main switch the
circulation pump is running (unless the pump thermostat is connected).
2. Boiler equipped with a programmable regulator Honeywell CM 707 – the pump is controlled by the indoor
thermostat
3. Stack water heater connection - the pump is controlled by the heater thermostat ; after its disconnection
the indoor thermostat takes over the control functions.
4. Boiler equipped with equitherm regulator according to regulation A1 - A4 -the pump operation is
controlled according to regulator programme (see. chap. 5.1)
Fig. no. 10
Grundfos UPS 25-40 pump characteristics
7.
Stack hot service water heaters
7.1
Technical data of recommended hot service water heaters
Tab. no. 6
Thermal-technical parameters of VIADRUS OV 100 L heater
Heater volume
l
100
Heater heat output (spiral heating wire)
kW
23
Heating insertion (heater) heat transfer surface
m
2
~ 0,9
Connections: - heating water
Js
3/4“
- hot service water
Js
1/2“
Heater dimensions: - height
mm
886
- width
mm
574
- depth
mm
587
Weight
kg
60
Heating body rated overpressure
kPa
(bar)
400
(4)
Maximum working overpressure for HWS
kPa
(bar)
600
(6)
Adjustment range
°C
0 – 90 °C ***)
Time for water heated from 10 °C to 60 °C
(boiler output 26,5 kW and water temperature 85 °C) *)
min
14
Water flow rate (boiler output 26,5 kW) **)
l/h
610
Connecting voltage
1/N/PE 230 V AC 50 Hz TN-S
Electric coverage
IP 40
Environment
normal, according to
Č
SN 33 2000-1
ed. 2
Summary of Contents for GARDE G 42 ECO
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