GRUNDFOS HYDRO MULTI-S 3 CR 15-7 booster sets are designed for the transfer and pressure boosting of clean water in blocks of flats, hotels, schools, etc.
PRODUCT DESCRIPTION :
Hydro Multi-S consists of 3 identical CR15-7 pumps connected in parallel and mounted on a common base frame, with a control cabinet with integrated controller and provided with all the necessary fittings. The booster set is fitted with an on/off switch for the supply voltage. The GRUNDFOS Hydro Multi-S booster set is factory-tested and ready for operation. To ensure stable operation, the booster set must be fitted with a suitable diaphragm tank.
FEATURES :
- Automatic cascade control of pumps by means of 3 pressure switches
- Automatic pump changeover at any start/stop cycle
- If a pump is in fault status, it is automatically taken out of operation
- Automatic resetting of dry-running fault
- Manual resetting of overload trip
- Emergency operation
- Pump and system protection
- short-circuit protection by means of fuses
- motor protection by means of a thermal overload relay
- dry-running protection by means of an additional pressure switch or level switch (optional)
- start-up delay between two pumps: prevents simultaneous start-up of more than one pump.
TECHNICAL DATA GRUNDFOS HYDRO MULTI-S 3 CR 15 :
- Liquid:
Pumped liquid: Water
Liquid temperature range: 5 .. 60 °C
Selected liquid temperature: 20 °C
Density: 998.2 kg/m³ - Technical:
Rated flow: 51 m³/h
Maximum flow: 72 m³/h
Rated head: 78 m
Approvals: CE
Number of pumps: 3 - Installation:
Maximum operating pressure: 16 bar
Pipe connection: 3″
Earth connection: PE
Electrical data:
Rated power – P2: 5.5 kW
Mains frequency: 50 Hz
Rated voltage: 3 x 380-415 V
Method of start: DOL
Enclosure class (IEC 34-5): IP54
