Drums should be protected from exposure to
direct sunlight and/or precipitation. To prevent condensation
due to temperature/humidity extremes, sealed drums should
be moved inside at least 24 hours before system is filled.
Location - Fluid should be added
at the lowest point of the system, preferably at the
suction side of circulating pump to force air out
of the vent valves. Aeration of the fluid should be
avoided - do not add directly to the expansion tank.
Pump - Any portable or drum pump
with sufficient capacity is acceptable. Do not use
system circulating pump to add fluid since seal damage
can result from running pump dry. All tubing, hoses,
etc. should be oil resistant.
Valves - Open all vent/bleed
valves as well as process block valves, control valves
and all valves connecting system to expansion tank.
Filling - Add fluid to system.
Close off vent/bleed valves when fluid runs out. Stop
filling when fluid runs out of highest point.
Use system pump to circulate fluid slowly
through system until all gas bubbles have escaped into
expansion tank or have vented through vent/bleed valves.
Centrifugal Pump - Valve on pump
discharge should be almost closed at start-up. Open
valve slowly until 1/2 open and let fluid circulate.
Gear Pump - Cycle pump "on"
and "off", gradually increasing "on"
time until continuous operation is possible.
Cycle control valves until all loops
are full. Add fluid as required to maintain level
at 1/4 full in expansion tank.
Make sure Y-strainer (if installed)
is clear before heater is operated.
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