Purging And Pressure Testing The System; Purging - Viega Climate Trak Installation Manual

6.2 Purging and Pressure Testing the System

6.2.1 Purging

IM-HC 530590 0621 Climate Trak (EN)
4. Use the SVC Compression or PEX Press Adapters to connect the
Viega Barrier PEX lines to the manifold.
5. Remove the grey cap from the diverting valve on the Mixing Station
and screw the actuator on hand tight.†
† Perform step 5 after the system has been filled and purged; refer to section 6.2 for
procedure.
1. Attach drain hose to purge valve hose connection on return header
and open valve.
2. Close all but one balancing valve on supply header (under red caps,
turn with 5mm allen key). Close isolation ball valve on boiler return
line. Remove plastic dust cap or temperature controller from diverting
valve, and make sure that high limit kit is fully open.
3. Open boiler fast fill valve to purge circuit. After purging first circuit,
close red balancing valve and open next one. Continue with one
circuit at a time until all circuits have been purged.
4. Close purge valve and open all balancing and boiler valves. Reset
high-limit kit, and reinstall actuator onto diverting valve.
5. Any remaining air pockets in the system will be eliminated through the
automatic air vent after a few hours of constant circulation.
If the system must be purged again in the future for any
reason, the high-limit kit must be reopened during purging for
full flow.
System Start-Up
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