Heating Distribution And Load Side Purging; Reassembling The Heat Pump - Kensa Group Kensa Heat Pumps P250X Manual

Ground side
Schrader valve
Fig 15 Location of heat pump schrader valves (Bleed Points)

5.1.6 Heating distribution and load side purging

Find the cold fill for the heating system and open the valve on the heating system to allow water
i.
into the heating system and the Heat pump.
Follow the manufacturer's procedures for purging the heating system.
ii.
For any systems that involves cooling, antifreeze (approximately 22% ,Refractive index 1.356) must
iii.
be added to the distribution load side.
Remove the cap from the heating bleed port and depress the Schrader valve using a small
iv.
screw driver, as shown in Fig 15
Alternatively, the Schrader valve core can be unscrewed completely using a car valve core remover
v.
and a 10 mm internal diameter plastic pipe placed on the outside of the valve to allow any water or
air to be vented into a bucket.
When a constant stream of water comes from the valve the pump will have been bled. This
vi.
procedure needs to be repeated at intervals during the commissioning procedure if there is any air
in the heating system. Place the cap back on the bleed valve.
We recommend a central heating inhibitor is added to the heating water in the heating distribution circuit

5.1.7 Reassembling the heat pump

i. Ensure all tools and materials are removed from the inside of the unit.
ii. Carefully lift the hood/door back onto the heat pump using the appropriate lifting procedures.
iii. Using the 3mm Allen socket screws on either side of the base of the hood secure the hood in place.
iv. Replace the door and lock it shut.
Plant Room Heat Pump Manual Version 11.1
Page 23 of 34
Heating
distribution
Schrader valve