Vii.5 - Regulating The Flow In The By-Pass Loop; Vii.6- The Initial Heating Phase; Vii.7 - The Regulating Phase - Procopi ClimExel HC-HH-62M Installation Instructions And Recommendations For Use And Maintenance

VII.5- Regulating the flow rate in the by-pass loop:
The amount by which the pool water temperature is raised on passing though the titanium heat exchanger
depends on a number of parameters:
o water flow rate (adjustable)
o the temperature difference between the heat transfer fluid (hot) and the incoming pool water. The higher
the temperature of the ambient air, the hotter the heat transfer fluid on entering the exchanger.
At an ambient air temperature of 15°C with a pool water temperature of about 20°C at the heat pump
inlet, a correct elevation of the water temperature within the heat pump (that is the difference in water
temperature at the inlet and outlet of the heat pump) would be approximately 1.5°C for a HC-HH 62 M.
This temperature delta between the heat pump inlet and outlet will rise gradually as a function of the
machine's heating capacity to approximately 3.5-4°C for a HC-HH 172 T.
The heating capacity of the heat pump will vary according to the temperature of the pool water and the
ambient air:
o the heating capacity will decrease as the temperature of the ambient air falls and/or the temperature of
the pool water rises
o the heating capacity will rise as the temperature of the ambient air rises and/or the temperature of the
pool water decreases
Adjust the setting of the bypass valve to optimise the heating capacity: the perceived temperature
difference will increase with increasing the flow rate, and vice versa.
Nota Bene:
The build-up of impurities (limescale, etc.) or partial blocking the of the heat exchanger will cause the
efficiency of the heat transfer between the heat transfer fluid and the pool water to fall. Under such
circumstances, it may prove impossible to achieve correct heating of the pool even with the by-pass valve
opened fully.

VII.6- The initial heating phase:

When the heat pump is started up for the first time, or at the beginning of the season, the pool water will
need to be heated significantly to achieve the desired temperature (the set-point temperature).
In addition to minimising heat loss from the pool, it will frequently be necessary to allow filtration to
run 24 hours a day so that the heat pump can heat the pool water continuously in order to reach the
temperature set point within a reasonable period of time.
Once these precautions have been taken, it is not unusual for the initial heating period to last 2 to
4 days. The length of time required will depend on the ambient air temperature during the day and
during the night (although the temperature may be high during a sunny day, the nights are frequently cool
at the beginning of the season).
VII.7- The regulation phase:
The heat pump will switch to standby mode as soon as the temperature at the heat pump water inlet
reaches the set point.
It will start up automatically as soon as the pool water temperature at the heat exchanger water inlet falls
more than 1°C below the set point value.
Nota bene:
In the event that filtration is not slaved to the heat pump, temperature regulation will only take place
while the filtration is running.
Under such circumstances, the daily filtration run time may be insufficient to allow the heat pump
correctly maintain the pool water temperature at the set point.
In this case either slave filtration to the heat pump, or increase the length of the filtration run cycles and
limit heat loss from the pool while the pool is not in use (install a pool cover if one is not already installed.
2009/01 - Indice de révision : C - Code : 0033385
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