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1. GENERAL
1.1 Applications
For the circulation of water in domestic hot water distribution
systems, low pressure heating systems, air conditioning
systems and all systems for the pumping of hot or cold water
without abrasive or aggressive particles in suspension.
1.2 Technical characteristics
•Max. service pressure
• Temperature range
for domestic hot water
•Frequency
• Speed
NEC 1
NEC 2
• Winding
single-phase
3-phase
• Insulation class
• Protection index
2. SAFETY
This manual must be read carefully before proceeding with
installation and commissioning. In particular, care must be
taken to comply with the points concerning the safety of the
equipment with respect to intermediate or final users.
2.1 Symbols for instructions in manual
Potential hazard for safety of personnel.
Instructions on electrical risks
Instructions indicated in this way must be
CAUTION!
complied with in order to avoid the risk of
damaging the equipment and adversely affecting its
operation.
3. TRANSPORT AND STORAGE
As soon as the equipment is received, check that it has not
been damaged during transport. If any defect is noted, all the
necessary steps must be taken with regard to the carrier.
If the equipment delivered is to be installed
CAUTION!
some time later, store it in a dry place and
protect it against impacts and all external effects (humidity,
freezing conditions, etc.).
4. PRODUCTS AND ACCESSORIES
4.1 Pump
•Single-stage centrifugal pump.
•Volute casing with "in-line" suction and discharge ports
(for direct fitting onto piping).
The motor is ventilated at extended stainless steel shaft end.
Tight sealing on shaft feed-through is ensured by a self-
lubricated, maintenance-free packing.
: 10 bars
: - 8°C to + 110°C
: ≤ 60°C (in accord.with DTU)
: 50 Hz
: 1,450 rpm
: 2,850 rpm
: 230 V
: 230 - 400 V
: F
: IP 54 (terminal box)
: IP 44 (motor)
4.2 Accessories (optional)
• Unions • Kit NEC 33 • Motor protection circuit breaker •
Isolating valves • Check valve, etc.
5. INSTALLATION (See FIG. 1)
1 - Boiler
2 - Heating pump
3 - Domestic hot water preparation unit
4 - Hot water distribution stations
5 - Domestic hot water system (loop)
6 - Isolating valve
7 - Check valve
8 - Safety set (relief valve + gate valve)
9 - Cold water supply for preparation unit
10 - Heating outward system
11 - Heating return system
* Max. temperature in system: 60°C
5.1 Fitting
- The standard NEC pump is designed for use on a return
system. It is supplied with the suction port on top (indicated
by an arrow on the appliance's casing) (See FIG. 2).
- In the case of installation on a heating system or air
conditioning system (suction port facing downwards), the
pump casing should be swivelled on the spacer through an
angle of 180° (or 90°) (See FIG. 2).
The centreline of the electric motor must always be horizontal.
5.2 Hydraulic connections
- Direct connection to pipe with threaded fitting by means of
unions (not supplied) 26-34.
- Position the NEC on a vertical or horizontal pipe and
provide for isolating valves on either side to make dismantling
easier.
- A check valve should be installed on the discharge side for
domestic hot water distribution applications.
- Check that the pipes are correctly aligned to avoid any
clamping on the appliance.
5.3 Electrical connections
Electrical connections and checks must be made by an
approved electrician in compliance with the applicable
local standards.
Check that the terminal box is accessible and protected from
any hazards due to water (leaks, splashes or condensation,
etc.).
- Make sure that the characteristics of the electric current
and the available voltage comply with the information
marked on the appliance's identification plate.
- Use a cable that complies with EDF standards or with the
applicable local standards.
•Protection of the motor by circuit breaker 439D or similar is
mandatory. (See FIG. 4).
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