Water charging
Charge the water, in the heating circuit, until the pressure gauge shows 0.2 MPa (2 bar).
The hydraulic pressure may drop when the trial run begins. In this case, add water until the hydraulic
pressure returns to 0.2MPa (2 bar)
Air may enter the heating circuit if the hydraulic pressure is low.
Loosen the Air relief valve cap by two turns to release air (see diagram).
Ensure all air is removed from the system. If air remains in the system
then the system operation may STOP.
Note: Due to the design of the electrical back up heater it is not
recommended to add any corrosion inhibitors / additives to the
heating circuit.
Water quality
The water used must satisfy EN directive 98/83 EC.
Piping insulation
It is recommended that insulation is fitted to all pipes. To perform optional cooling operation, apply
insulation with a rating of 20t or more to all pipes.
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