Vertiv Liebert PCW - Adding Ethylene Glycol

9Liebert PCW - UM - 273895 - 04.10.2018
For double chilled water circuit units swing the electrical panel to
connect the two pipe stubs to the right chilled water valve, see
para. 6.2 for electrical panel swinging details.
In the Fan Module use the pipe clamps to x the pipe stubs.
Pipe
clamps
As the pipe stubs are xed, close the plate on the drain panel (if it
has been removed). Seal any free space between tubes and drain
panel to prevent air by- pass.
Upow Version with Standard Piping Top
Connect the two pipe stubs to the piping end inside the unit.
The pipe with threaded looking ring must be connected directly to
the valve inlet.
Use hemp and paste to get a reliable pressure-tight joint.
Connect the second pipe stub directly to the water outlet pipe using
the Victaulic connection. See Victaulic Connection Details.
In the Fan Top Plenum use appropriate clamps to x the pipe stubs.
Once the pipe stubs are xed seal any free space in the pipe pas-
sage through the upper panel to avoid air by- pass.
5.4 - Adding ethylene glycol
Tab. e - Ethylene glycol to be added to water
N.B. Values are for Shell antifreeze 402. For di󰀨erent brands check
manufacturer’s data.
NOTES:
• To avoid stratication run the circulation pump for at least
• 30 min. after adding any glycol.
• After adding water to the water circuit, disconnect the unit
from the sanitary water piping system; in this way the water
mixed with glycol will not return into the same piping system.
• After any topping- up of water check the glycol concentration
and add any glycol if necessary.
• The hydraulic features of the system vary by adding glycol.
Therefore check the head and the ow rate of the pump to
be used.
See Hydraulic drawings in Enclosure D.
Pipe
clamps
Pipe stubs
freezing temperature (
0
C) 0 - 5 - 11 - 18 - 27 - 39
ethylene glycol to add to
water (% in weight of total
mixture)
0 10 20 30 40 50
Plate
removal