How do I identify my Heat Pump Model?

Modified on Tue, 23 May 2023 at 10:28 AM

The model of the heat pump can be found on the data badge on the casing of the unit.

 

For example, SI 14 ME would be - ground source heat pump, internally installed, 14kw, single phased with a WPM controller mounted onto the heat pump.

 

If the model had been SI 14 MER would be the same as the above but with an added feature, the R advises us it is a reversible unit.


 

HEAT PUMP MODEL BREAKDOWN

First Letter:

L = AIR SOURCE HEAT PUMP

S = GROUND SOURCE HEAT PUMP

W = WATER SOURCE

 

Second Letter:

A = Externally Installed (Outside of property)

I = Internally installed (Within property)

 

Third Letter (If applicable):

K = COMPACT UNITS. Normally with an integrated Buffer/Cylinder.

H = HIGH TEMPERATURE UNIT

S = SWIMMING POOL

B = BASIC MODEL


The number indicates the kW rating under test conditions;

  • Air source – A7/W35
  • Ground source – B0/W35

 

Fourth Letter:

M = SINGLE PHASED SUPPLY

T = THREE PHASED SUPPLY (used to be A some time ago)

 

Fifth Letter:

U = WPM ECON/ECON R CONTROLLER.

S = WPM CONTROLLER. This is separate from the heat pump.

E = WPM CONTROLLER. Enclosed within the heat pump itself.

I = INVERTER

 

Additional Letter/Symbol:

R = REVERSIBLE. These pumps can be used for both heating and cooling. Very rare to find these units.

+ = Second heat exchanger for heat recovery during cooling.






Applicable Models: SI, LA, LI, WA

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