GRUNDFOS INSTRUCTIONS
10
To enable maintenance and service of the PHT A unit to be carried out satisfactorily,
the area should have adequate lighting for this work to be carried out safely.
Ensure that the PHT A is positioned to allow access for examination and service.
Allow the following:
A minimum of 50 cm above all units.
A minimum of 50 cm to the system connection side of all units.
A minimum of 100 cm to the front of the unit.
Adequate drainage facilities and protection from water damage in the immediate
vicinity of the PHT A unit must be provided.
If the PHT A unit is installed into a roof spaces, then provisions should be made for the
small level of vibration associated with any rotating equipment in case it causes
disturbance. Provision should also be made for drainage of the unit, leakage and any loss of water
during commissioning and service.
The PHT A unit should not be installed in an unventilated small space, ensure
adequate ventilation for the motor.
6.8 General requirements.
The installation pipework may need to be properly supported
before being connected to the PHT A unit so that the PHT A unit is not stressed.
The pipework installation to and from the PHT A unit should be in accordance with local
water authority regulations, best industry practice and according to any design
recommendation
The electrical installation of the PHT A unit should be in accordance with the latest issue
of the I.E.E. regulations and performed by a competent installer.
The equipment must be Earthed
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