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Calorex Heat Pumps Ltd. · The Causeway, Maldon, Essex CM9 4XD, UK · Tel: +44 (0)1621 857 171
Installation Manual
PPT8/12/16/22L/LY
R
2.2 Air flow
Suitable opening
Suitable opening
> 50 cm
PLANT ROOM
WALL
WALL
FIG 1 POSSIBLE POSITIONS OF A CALOREX HEAT PUMP
SWIMMING POOL/SPA
CALOREX
CA
L
O
R
E
X
CALOREX
CALOREX
CALOREX
MODEL
Inlet Discharge
PPT8
0.157
0.168
PPT12
0.264
0.168
PPT16
0.264
0.173
PPT22
0.308
0.173
Minimum Free Area m²
TABLE 1
Note if multiple units are installed in an enclosed area then the inlet free
areas required for each unit can be added together to form one inlet
aperture. BUT discharge from each unit must be kept separate and must
not be incorporated into one common duct system.
Due consideration must be given to air flow i.e. do not obstruct inlet or outlet
and ensure discharge to air cannot recirculate to inlet. (See figure 1).
Required Free Areas to provide air flow to
and from heat pumps when installed in an
enclosed area or where required to pass air
through a wall etc.
Free areas is the available area through
which air can pass through a grille or
louvres.
