3.0 PLUMBING
a) Calorex Heat Pumps have water inlet/outlet connections as follows:
All models have fittings which enable the heat pump to be connected to either
1½” or 50mm pipe work.
b) The heat pump is supplied with bungs fitted in the water connection fittings
These need to be removed before the heat pump is installed. (See section
3.2).
c) The Calorex Heat Pump must be connected after the filter in the return pipe
to the pool. If an existing heater is being retained, then the Calorex Heat
Pump should be connected between the filter and the other heater. (See
section 3.1).
d) Suitable breakable couplings should be installed local to the heat pump.
e) If the heat pump is installed at a lower level than the pool then isolation
valves should be fitted.
f) A drain valve or plug should be fitted to the lower pipe to facilitate drain
down in the winter period.
g) Connections on all models are by 1½” or 50mm Female fittings. The water
in/water out pipes need to be glued into these connections using a
suitable adhesive.
h) The condensate drain at the base of the unit collects condensation from the
evaporator fins. This should run away to waste via ¾” domestic waste
piping. It is therefore necessary to ensure that the Calorex Heat Pump is
placed on a level plinth so that the condensate water can run away with
adequate fall to waste i.e. ½” per foot minimum and must incorporate a “u”
trap as to not overflow the edges of the drip tray inside the heat pump.
See below.
) When the pipework installation is complete the pool pump should be
switched on and the system tested for leaks. Also check the filter gauge to
see that there is not an excessive increase in back pressure. If everything is
then working normally the water circulating system is ready for use.
j) Water circuit to and from the unit is to be capable of maintaining within
specified limits the rate of flow required by the heat pump. (See section 9).
k) All pipework must be adequately supported with allowance expansion/
contraction especially with plastic pipework.
l) It is recommended that when installing water systems the last connections
to be made in the system should be breakable connections to avoid any
stresses on the unit connections.
IMPORTANT
1. All Pool Purifying Devices and Chemical Injection Systems to be fitted down
stream of the heat pump (see section 3.1) unless installation is as per filter
dosing. This includes the practice of dosing chemicals direct into skimmer
basket, which results in concentrated corrosive liquids passing over
vulnerable metal components.
2. Water quality must be maintained as follows:
3. Maximum pressure of water in heat pump circuit should not exceed 3.5bar
for PPT16/22 (50 psi).
This type of
installation
should be avoided
Incorrect drainage
for condensate
CORRECT DRAINAGE
FOR CONDENSATE
Elbow
'U' trap
Adequate fall
Acidity pH
pH
7.2 - 7.8
Total Alkalinity, as CaCO3
ppm
80 - 120
Total Hardness, as CaCO3
ppm
150 - 250
Total Dissolved Solids
ppm
1000 Max
Maximum Salt Content
ppm
35000 Max
Free Chlorine Range
ppm
1 - 2 Domestic
Free Chlorine Range
ppm
3 - 6 Commercial
Superchlorination
max
30ppm for 24 hrs
Bromine
ppm
2 - 5
Baquacil
ppm
25 - 50
Ozone
ppm
0.9 Max
Maximum Copper Content
ppm
1
Aquamatic Ionic Purifier
ppm
2 Max
9
SD6381652 ISSUE 4
