How do I identify my Heat Pump Model?

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