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Dated 17/09/19 V1.2
ESP-HC-DHW 11DC
ESP-HC-DHW 17DC
7 Maintenance
7.1 Maintenance and Cleaning Guidance
It is good practice to inspect your heat pump regularly. Maintenance must be carried out at least annually
to ensure the longevity of your heat pump and to meet warranty conditions. There are no user-maintainable
items inside the cover of the Solis unit. Should you notice unusual sounds or odours emanating from
your Solis unit, you should turn the unit to standby, isolate it at the rotary isolation then call your installer
for advice. Please see the document “Maintenance Requirements” issued by Earth Save Products
Limited.
1. Clean the filter in the return pipework between the buffer and the Solis every 6 months to ensure
that the system is clean and to avoid blockage to the system.
2. The Solis should be kept clean and free of debris (leaves etc) and clear of obstructions to the
front and rear. Good ventilation and regular cleaning (3-6 months) of the evaporator will help
maintain maximum efficiency.
3. Ensure the unit has power throughout the year whether the unit is used or not.
4. Check the power supply to the unit and all electrical cable for damage, security and condition.
Should you discover any signs of damage, the unit should be closed down, isolated and the rotary
isolation switch a qualified electrician consulted.
5. Check the water pipes, condensate drain, safety valves and other safety devices for correct
functionality and leaks.
6. Check that the various components of the unit are working properly. Inspect the refrigerant
pipes, joints and components for oil leaks that could indicate refrigerant leaks.
7. Chemically flush the plate heat exchanger after every 3 years.
8. Check refrigerant pressure if necessary.
9. Check ΔT (water in/out differential) to ensure that it is between 3 to 7.
10. Check electrical components for signs of impending failure (swelling, discolouration etc)
8 How to Get the Most Out Of Your Heat Pump
It is important to understand that your heat pump(s) is/are used very differently from conventional heating
systems such as gas boilers. Listed below are a few pointers:
Since heat pumps produce water at a lower temperature (than carbon based boilers), it is important
to remember that your property will heat up more gradually.
The lower temperature the heat pump produces, the more efficient your Solis will be.
The higher the ambient temperature (outside temperature), the more efficient your Solis will be.
The heat pump has a simple job, and that is to maintain the buffer tank at the set temperature.
It is strongly recommended that your Solis is allowed to run 24 hours a day during the Heating
Season. By maintaining your property at a steady temperature, the Solis will be more efficient. This
will enable your central heating controller to call for heat at any time.
All installations are unique and must be designed to suit the property, aspect, occupant requirements and
Building Regulations during the design phase BEFORE installation. Often it is too late to change the
designed usage drastically after commissioning. Whilst 24hr operation is high recommended for the
Heating Season, the use of energy monitors may help the operator to ‘fine tune’ the system to achieve
greater efficiency and match occupant lifestyle.
