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1. GENERAL
1.1. Applications
For faster circulation of hot water in :
- Secondary hot water distribution loops.
- Industrial water loops (air conditioning,
cooling, tank circulating).
1.2. Specifications
• Max. secondary hot water
loop temperature
• Ambient temperature
• Max. service pressure
• Min. suction pressure (m w.g.**) : 1.5 m (0.15 bar) at +82°C
• Hardness of water (TH) max.
• Water-glycol mixture
(with the exclusion of all other liquids without first
obtaining the agreement).
• Recommended flow velocity : between 0.5
•Max. flowrate (50 Hz)
* In accordance with DTU recommendations
(circulator temperature range -10° to + 110°C)
** 10.2 m w.g. = 1 bar
2. SAFETY
Read this data sheet carefully before installing and
starting up. Pay special attention to the points
concerning the safety of the equipment for the
intermediate or end user.
2.1. Symbols used in the manual
Security instruction : non respect can induce
injury.
Electrical security instruction : non respect can
induce injury.
Security instruction : non respect can
CAUTION !
be induce material damages.
3. TRANSPORT AND STORAGE
When taking delivery of the equipment, check that it
has not been damaged in transit. If anything is found
wrong, take the necessary steps with the carrier within
the allowed time.
If the equipment delivered is to be
CAUTION !
installed at a later time, store it in a dry
place and protect it from impacts and outside influences
(moisture, frost, etc.).
: + 60°C*
: up to + 40°C
: 10 bar
: 3 m (0.3 bar) at +95°C
: 10 m (1 bar) at +110°C
: 35° F (20° US - 24° UK)
: up to 50%
and 1 m/s max.
: NSB-S 25-20 4 m
/h
3
NSB-S 30-25 5,5 m
/h
3
NSB-S 40-25 6,5 m
/h
3
4. PRODUCTS AND ACCESSORIES
4.1. The pump
Pump casing with threaded ports.
Motor 2 poles with a wet rotor, the bushings are self-
lubricating.
Three speeds, manual selection by selector switch.
• Insulation class
• Protection
Frequency
Voltage * (1-phase)
* standard voltage : tolerance 50 Hz ± 10 %
4.2 Accessories
Supplied : • Union's gasket •
Recommended : • Weld-on unions • Brass or steel unions
• non return valve • Isolating valve...
5. INSTALLATION
5.1. Assembly (See FIGS. 1 and 2)
- Make sure that the circulator is accessible.
- Install directly on a horizontal or vertical pipe, on the
distribution loop return, after the drawing points.
- The motor shaft axis must always be horizontal.
- Install a check valve on the discharge, and isolating
valves to facilitate removal and other work on it.
If the circulator must be insulated, we
CAUTION !
advise
evacuation notches in the motor flange (See FIG. 3).
5.2. Orientation of terminal box (See FIG. 2)
If necessary, the orientation of the motor, and with it
that of the terminal box, can be changed.
- Remove the motor attachment screws and turn the
motor to the desired position.
Take care not to damage the casing
CAUTION !
gasket, and reinstall it correctly.
5.3. Electrical connection
The electrical connection must be made by a
qualified electrician and comply with applicable
local standards.
Complete electrical information about the circulator is
given on the data plate.
Power supply network (single-phase 230 V)
Use a three-conductor cable (3 x 1,5 mm
connect mains power to the corresponding terminals
of the circulator: phase (L), neutral (N), and earth ( )
(See FIG. 4).
The power cable must not touch the pipe or the
pump; make sure that it is away from any
moisture.
Check line protection and the mains voltage and
frequency.
6
: F (155°C)
: IP44
50 Hz
230 V
against
obstructing
H05 VVF) to
2
the
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