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1. GENERAL
1.1. Applications
This circulator is suitable for drinking water only.
For faster circulation of hot water in secondary hot
water distribution loops.
1.2. Specifications
• Max. secondary hot water
loop temperature
• Ambient temperature
• Max. service pressure
• Min. suction pressure
(m w.g.*)
• Hardness of water (TH) max. : 35° F (20° US - 24° UK)
• Recommended flow velocity : between 0.5
•Max. flowrate (50 Hz)
TYPE NSB
flowrate
NSB05-15B
1,5 m
3
/h
NSB10-15B
2,5 m
3
/h
NSB15-15B
3 m
3
/h
NSB25-25B
4,5 m
3
/h
* 10,2 m w.g. = 1 bar = 10
** In accordance with DTU recommendations
(circulator temperature range -10° to 110°C)
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.
This appliance is not intended for use by persons
(including children) with reduced physical, sensory or
mental capabilities, or lack of experience and
knowledge, unless they have been given supervision
or instruction concerning use of the appliance by a
person responsible for their safety.
Children should be supervised to ensure that they do
not play with the appliance.
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 be
ATTENTION !
induce material damages.
: + 60°C**
: up to + 40°C
6
: 10
Pa (10 bar)
: 1,5.10
4
Pa (1.5 m ; 0.15 bar)
at +82°C
: 3.10
4
Pa (3 m ; 0.3 bar)
at +95°C
: 10
5
Pa (10 m ; 1bar)
at +110°C
and 1 m/s max.
TYPE NSB / DSB flowrate
NSB25-20B
4,5 m
3
/h
NSB30-25B
5,5 m
3
/h
DSB33-25B
6 m
3
/h
5
Pa
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
ATTENTION !
installed at a later time, store it in a dry
place and protect it from impacts and outside influences
(moisture, frost, etc.).
4. PRODUCTS AND ACCESSORIES
4.1. The pump
Pump casing with threaded ports.
The motor has a wet rotor; the bushings are self-
lubricating.
Three speeds (one for the type NSB05-15B) ; manual
selection by selector switch.
• Insulation class
• Protection
Frequency
Voltage * (1-phase)
* standard voltage : tolerance 50 Hz ± 10 % - 60 Hz ± 6 %
4.2 Accessories
Supplied : • Union's gasket •
Recommended : • Weld-on unions • Brass on steel unions
• PN 6 screw-on oval counter flange for replacement of
the SA15 • Adaptation kit - KIT 150 from H130 Ø G1 to
1/2
H150 Ø G1
• Non return valve • Isolating valve •
1/2
Adaptation ring G1
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.
For connection with the water supply
network, the use of new accessories is
ATTENTION !
necessary.
- The motor shaft axis must always be horizontal.
- The arrow on the pump casing indicates the
direction of water flow (see FIG. 3).
- 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
ATTENTION !
advise
evacuation notches in the motor flange (see FIG. 3).
5.2. Orientation of terminal box (see FIG. 4)
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
ATTENTION !
gasket, and reinstall it correctly.
8
: F (155°C)
: IP42
50 Hz
60 Hz
230 V
220/240 V
to G2...
against
obstructing
the
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