User Manual

1. GENERAL
1.1 Applications
SC20-25
For faster circulation of water in closed -
circuit domestic (individual) central heating
and air-conditioning systems.
SB25-20, SB30-25, SS30-25
For faster circulation of hot water in:
- Secondary hot water distribution loops.
- Industrial water loops (air conditioning,
cooling, tank circulating).
1.2 Specications
• Temperaturerange: -10
o
to+110
o
C
• Ambienttemperature: upto+40
o
C
• Max.servicepressure:10bar
• Min.suctionpressure: 1.5m(0.15bar)
(m w.g.*) at +82
o
C;
3m (0.3 bar)
at +95
o
C;
  10m(1bar)at
  +100
o
C
• Antifreeze
(water + glycol): up to 50%
 (withtheexclusionofallotherliquids
withoutrstobtainingthewritten
approval from Davey Products Pty Ltd)
• Hardnessofwater(TH):max.350ppm
• Recommended
 owvelocity:  between0.5
    and1m/smax
NOTE:Thispumpisnot approved nor
intended for use in swimming
pools, spa pools or spa baths.
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enduser.
2.1 Symbols used in the manual
Warning
Instructions concerning electricity
Calls attention to a potential
risk that might affect safety.
3. TRANSPORT AND STORAGE
Whentakingdeliveryoftheequipment,
check that it has not been damaged in
transit.
 Iftheequipmentdeliveredistobe
installed at a later time, store it in a
dry place and protect it from impact
andoutsideinuences(moisture,
frost, etc).
4. PRODUCTS AND ACCESSORIES
4.1 The Pump
With threaded ports according to model.
Themotorhasawetrotorandthe
bearings are self lubricating.
Three-speedwithmanualselectionby
selector switch.
• Compliance:  TF10
• Insulationclass: F(155
o
C)
• Protection:  IP42
 (onlywithterminalboxat6,clock
position on SS30-25).
4.2 Accessories
Supplied: Unions with gaskets
Recommended: Non return valves
Isolating valves
5. INSTALLATION
5.1 Assembly (see FIG. 1&2)
- Makesurethatthecirculatoris
accessible.
- Assembledirectlyonapipe,preferably
vertical, and if possible on the boiler
return circuit; never at the low point (to
protect against deposits).
- The motor shaft axis must always be
horizontal.
- Thearrowonthepumpcasingindicates
thedirectionofwaterow(seeFIG.3).
- Install isolating valves on both sides of
the circulator to facilitate removal for
servicing.
If the circulator must
be insulated, we advise
against obstructing the
evacuation notches in the
motorange(seeFIG.3).
~ 2 ~ ~ 7 ~