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 Hot Water Coils

Akvaterm make copper heat exchange coils for their tanks with rated flow from 35 l/min (LK35) to 200 l/min (LK200).  Coils are normally made from finned copper tube of 18mm, 22mm or 28mm diameter, but stainless steel coils can be made to order. All coils are pressure rated to 10 bar.

Although coils are primarily used to produce domestic hot water (DHW), they can be used to connect heating systems on hydraulically separate circuits (although direct connection of heating systems is recommended where possible), and are also used to input heat from a solar thermal system, as with the AKVA SOLAR tanks.

Coils for the standard AKVA, AKVASAN and AKVANTTI accumulator tanks are fitted in removable hatchways, whereas coils in the AKVA NERO, EGO, SOLAR, SOLAR PLUS and GEO ranges are built into the tanks and are not removable or exchangeable.  Further information on the coils supplied with tanks can be found on their respective information pages.

 

For DHW application, the cold water supply pressure must be taken into consideration, as there will inevitably be pressure drop through the coil(s).  Pressure drop is approximately 0.5 bar per coil at the maximum rated flow of the coil.

The thermal energy stored in the tank is better used if DHW is produced by two DHW coils in series a pre-heat coil in the lower part of the tank and a secondary coil at the top.

Akvaterm are also able to make customised copper coils to order; please forward a drawing of your proposed coil and we will see if we can help.

       
   

Model

Heat Exchange Capacity (kW)

Diameter    (mm)

Length        (mm)

Coupling size (inches)

Flow             (l/min)

LK 35

90

160

750

35

LK 45 110 160 750 45

LK 60

150

160

1,250

1

60

LK 80

205

250

900

1

80

LK 100

255

300

1,000

1

100

LK 120 310 300 1,100 2 120
LK 140 365 300 1,100 2 140
LK 160 420 300 1,100 2 160

A data sheet giving further details of coils up to LK120 is available here.

 

 

 

                           
                            LK35 Coil

 

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