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AHP60-50/70 -
Installation, Use and Maintenance
There are two types of methods for cleaning and removing sludge: a high intensity approach that
takes a few hours, and a slower, more gradual approach that takes several weeks. In the first case,
it is essential to clean before connecting the new heat pump. In the second case, fitting a filter on
the heat pump return will capture any loose deposits.
The cleaning performed prior to installation improves performance, reduces energy consumption,
and resists scaling and corrosion on the unit. A professional (water treatment) should carry out the
cleaning.
• Protecting the unit against scaling
Water naturally contains dissolved calcium ions and carbonates that cause scaling (calcium
carbonate) to form. To prevent excessive deposits, take precautions with regard to the water used
to fill the unit: 8°f < TH < 15.1°f.
When the installation contains softener, the equipment must be inspected frequently to check it
does not discharge any chlorine-rich water into the network: the chlorine concentration must always
remain below 50 ppm.
To prevent the build-up of calcium deposits (such as on exchange surfaces), the unit should be
brought into service slowly, starting by operating at a low power with high primary water flow.
Water must be added during the life of the heat pump. The new water adds scaling to the water
system. To avoid this, it is important to check that the hardness of the water added does not exceed
TH<5°f. The amount of fill water plus the amount of make-up water added during the life of the unit
should not be more than three times the water capacity of the heating system. If this guideline is not
followed, complete cleaning (descaling and cleaning) is necessary.
If it has excessive scaling, the unit's settings for operation and for water treatment must be adjusted.
Adding a large amount of untreated water always contributes a significant amount of scaling. To
monitor this and to detect problems, a system water meter must be installed.
When carrying out work on the installation, do not drain it completely. Only the sections of the circuit
concerned need to be drained.
• Protecting the heat pumps against corrosion
Corrosion can affect the iron components used in heat pumps and heating systems,, directly related
to the presence of oxygen in the water heater's water. Dissolved oxygen that enters the unit when it
is being filled for the first time reacts with the equipment materials and quickly disappears. Without
3.6.4. Control of primary circuit flow rates
CAUTION:
To manage the primary circuit water flow is essential for the product
performance and lifespan. The flow setting value must be adapted to the
application. Refer to the Ecomod Heat Pump Control manual (unit control)
and the design study.
It is imperative to install adjustment valves (not supplied), refer to the diagram library.
In the case of a cascade installation, the flow rate must be balanced between all units. It is
recommended to carry out this balancing using balancing valves in order to allow the measurement
unit flows over time.
CAUTION:
The adjustment and management of flow rates is the responsibility of the
installer/ under installer/operator responsibility and will not be operated by
Ideal Heating. During commissioning of the system, balancing control will be
requested by Ideal Heating. Without control, commissioning will be refused
.
3.6.5. Water quality
•
Preparing the water system before putting the heat pump into service
For any installation (new or renovation), the water pipes must be thoroughly cleaned. The purpose
of this initial cleaning is to eliminate germs and residue that can cause deposits to form.
In new installations in particular, residue from grease, oxidised metal, and even copper micro-
deposits must be scrupulously removed.
In renovated installations, cleaning should focus on removing sludge and the products of corrosion
formed when the unit was last in operation.