Dismantling - Grundfos PHT-N130 Installation And Operating Instructions Manual

Ensure any outgoing signals from the PHT unit are not going to cause activation of:
 Alarms/beacons
NOTE  BMS/Control panels/Boiler shut down
 Any other warning/monitoring devices installed (eg. SMS to mobile device).
Consideration should be given to contacting any building services personal
NOTE
beforehand and informing them of the de-commissioning and dismantling
of the PHT unit.
Always make sure that adequate provision is made to capture any water
NOTE
drained from the system and the PHT unit when dismantling.
Appropriate PPE must be worn. (including eye protection, footwear and gloves).
NOTE
Ensure the following:
Electrical:
Drain the PHT unit and system pipework from the point chosen to disconnect the

Isolate the Mains electrical supply, ensure it cannot be turned back on.

Isolate any electrical supply to the volt free contacts, ensure it cannot be turned back on

Remove all of the electrical supply cable(s) to the PHT unit.

Hydraulic:
Isolate the mains water input.

Isolate the PHT unit from the system by closing the PHT isolating valve or if another

isolating device has been used to isolate the PHT from the system use that.
Prepare the area for any spillage and have a vessel to drain the water into ready.

Any system water may contain poisonous, and possibly corrosive chemicals.

Always wear appropriate PPE
Drain off any pressure in the PHT unit via the draincock(s).

Drain off any remaining water in the header tank by removing the pump suction hoses

at the pump suction connection.
Drain off any remaining water in the manifold by removing the pump discharge hoses

at the pump discharge connection.
Clean up any water spillage.

Replace and cabinet panels removed.

Provide indication that the unit has been de-commissioned.


12.2 Dismantling.

Always make sure that adequate provision is made to capture any water
NOTE
drained from the system and the PHT unit when dismantling.
Appropriate PPE must be worn. (including eye protection, footwear and gloves).
NOTE
Ensure the following before Dismantling:
The unit has been fully decommissioned as per the above.

Remove any ground fixings.

Dismantle the pipework and wall fixings.

Remove the set with appropriate handling equipment and procedures.

Any system connections will be subject to system pressure.

Take care when dismantling.
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