Installation and operating instructions 5
English
2 Technical data
2.1 Data
* Reference value for the most efficient circulation pumps: EEI 0.20
2.2 Scope of delivery
•Pump
• Sealing rings
• Plug included
• Installation and operating instructions
3 Description and function
3.1 Intended use
The circulation pumps in this series are designed for warm
water heating systems and similar systems with constantly
changing flow volumes. Approved fluids are heating water
in accordance with VDI 2035, water/glycol mixture at a mix-
ing ratio of 1:1. If glycol is added, the delivery data of the
pump must be corrected according to the higher viscosity,
depending on the mixing ratio percentage.
CP50, CP60
Connection voltage 1 ~ 230 V ±10%, 50/60 Hz
Temperature class TF 95
Protection class IP See rating plate
Energy Efficiency Index EEI * See rating plate
Nominal connection diameter
(threaded connection)
DN 25 (Rp 1)
Water temperatures at max. ambi-
ent temperature of +40 °C
–10 °C to +95 °C
Max. ambient temperature –10 °C to +40 °C
Max. operating pressure 6 bar (600 kPa)
Minimum inlet pressure at +95 °C 0.3 bar (30 kPa)
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