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Product

Instructions

PI-PR-561051 0312 (Enhanced Mixing Station)

Purging

Assuming that the heat source is already filled and purged:

Stainless Balancing Manifolds

Supply manifold: remove black caps to expose balancing valve. Use a 5mm allen wrench to open and close each circuit.

Return manifold: use each blue return cap to open and close each circuit.

Stainless Balancing and Flow Meter Manifolds

Supply manifold: lift locking cap and turn flow meters to open and close each circuit.

Return manifold: use each blue return cap to open and close each circuit..

1. Open supply isolation valve and all supply and return circuits to fill Mixing Station and manifold from the heat source

2. Connect drain hose (i.e. washing machine hose) to hose thread on the return manifold purge valve (draw-off)

3. Open purge valve (draw-off)

4. Close supply isolation valve and open return isolation valve. Purge the return line

5. Spin grey cap on Diverting Valve so the valve position is about 50% open

6. Close return isolation valve

7. Open the supply isolation valve

8. Close supply and return balancing valves on manifold

9. Open the supply manifold circuit and return manifold circuit that is furthest from the draw-off; push air through the

entire circuit and out the draw-off eliminating air from that circuit

10. Once the air has been purged, close the supply and return circuits

11. Move onto the next circuit; watch the pressure gauge on the heat source;* do this for each circuit: open, purge, close

12. Once purging is complete, close draw-off and disconnect hose; open circuits and balance if necessary

13. Open the return isolation valve

14. Set safety high limit on Diverting Valve (optional)

NOTE: Purging time and the amount of discharge may vary. Systems may need to be purged more than once. Air in the

system may prevent flow and heat transfer. If system is purged in the future it is important to open the Diverting Valve fully

and to power down the circulator.

* Tip: Purging is easier when using more than operating pressure to push air out using a fastfill component to boost

pressure to 20-25 psi. Pressure must be kept below the Safety Pressure Relief Valve limit (commonly 30-50psi).

Another tip: use a 5 gallon bucket with the hose submerged under the water level. Use the air bubbles floating to the

surface as a guide. Once the air bubbles have stopped, purge a few seconds more to ensure the line is free of air. Watch

the pressure in the system CAREFULLY to avoid discharging the Safety Relief Valve.