13
InStALLAtIon
Ideal airtherm - Air Source Heat Pump -
Installation
Frost protection of the heating circuit is essential. We recommend the use of a combined inhibitor/anti-freeze, either Fernox Alphi
11 or Sentinel X500. The manufacturers’ recommendations on concentration should be followed.
A minimum concentration of 15% to 20% is needed to avoid any risk of corrosion. A 30% concentration gives frost protection down
to -15
o
C, the minimum operating temperature for the ASHP.
When an inhibitor/anti-freeze is used, the water flow and pressure drop need to be increased to the levels shown below.
FRoSt PRoteCtIon
Correct water flow is essential for reliable operation of the heat pump. Using the information in the table above and total system
pressure drop the selection of an appropriate water circulation pump can be made. Consult water circulation pump manufactures
data sheets for accurate water pump performance.
When the correct water pump has been selected a Delta ‘T’ of 3
o
C to 5
o
C between water in-let to outlet temperature indicates
correct flow rate.
Where frost protection is provided by the thermostats that control the unit, the water flow and pressure drop should be set to the
values shown in the data sheet on page 17 of this manual.
LegenD
A
Space Heating Temperature Controller
B
Mains Lamp (red)
C
Defrost Lamp (Green)
D
Programmer Live Lamp (red)
e
High Pressure Switch Manual Reset
F
Fault Lamp (amber)
(contact service engineer if high
pressure reset does not clear fault)
HEATING ºC
U
P
HEAT
PUMP
DEFROST
IF LIGHT SHOWS,
PRESS RED BUTTON
POWER
PROGRAMMER
LIVE
A
B
D
C
F
E
at9633
ContRoL PAneL
airtherm 4.5
airtherm 9 airtherm 12
Water flow +/-20%
litres/min 8.3 16.5 22.0
Pressure drop (water)
Metres head
1.7
1.0
0.5
The control panel is located on the right side of the
unit under the upper removable steel panel.
1.
To access, carefully remove the plastic screw
covers and the screws and washers beneath.
Place these to one side, ready for re-assembly.
2.
Slide the controls cover from the upper location
slots and place to one side.
3.
Re-assembly is in reverse order, taking care to
use the washers correctly to enable the screw
caps to be replaced.
2
1
All units have integral safety devices to protect the heat pump from integral and
external faults and indicator lamps showing operating mode. An adjustable
digital thermostat controls space heating and return water temperature. Also a
three minute cycle time delay which protects the compressor is incorporated.
