GRUNDFOS INSTRUCTIONS
32
Ensure any outgoing signals from the PHT A unit are not going to cause activation of:
▪ Alarms/beacons
▪ 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
beforehand and informing them of the de-commissioning and dismantling
of the
PHT A unit.
Always make sure that adequate provision is made to capture any
water drained from the system and the PHT A unit when dismantling.
Appropriate PPE must be worn. (including eye protection, footwear and gloves).
Ensure the following:
Electrical:
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 A unit.
Hydraulic:
Isolate the mains water input.
Isolate the PHT A unit from the system by closing the PHT A isolating valve or if
another isolating device has been used to isolate the PHT A 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 A 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 any 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 drained from the system and the PHT A unit when dismantling.
Appropriate PPE must be worn. (including eye protection, footwear and gloves).
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.
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