User's Manual

Piping
21 Liebert
®
DCP
™
3.7.3 Water Fill Line Connection
1. When filling the system, use only water that can be classified and used as drinking water.
a. Open all vents (loosen caps if applicable) to allow air to escape during filling.
b. Remove the Schrader pin in the valve at the top of the standpipe (see Figure 21) to obtain
0 psig pressure.
c. Open Valves #1 and #2 to allow the system to fill (see Figure 22).
d. When the water has reached the FILL level in the bottom sight glass of the standpipe,
immediately close Valve
#1 (see Figure 22) to isolate the standpipe from the system.
e. Replace the Schrader pin in the valve at the top of the standpipe.
2. Bleed air thoroughly (keep Valve #1 closed to isolate the standpipe from the system).
a. Depress pins at all vents.
b. Manually depress pins at all Schrader vents on each rack (see Figure 23).
c. Manually vent at pump housing plugs (see Figure 22).
d. Continue to vent until the system is full, then close Valve #2.
3. Open Valve #1 to reconnect the system to the standpipe (fluid level should rise above the fill, but
below the NORMAL level on the sight glass).
a. If the fluid level is above the NORMAL level, release water by opening the hose bib until the
level reaches the NORMAL level on the sight glass.
b. If the fluid level is below the NORMAL level on the sight glass, open Valve #2 until the level
reaches the NORMAL level.
4. Turn the system on (pumps will be in operation) and continue to vent air for 24 hours to remove
as much air as possible.
If Steps 1 through 3 are followed properly, the air pressure in the top of the standpipe should be
14 PSIG (±2PSIG).
5. When the system is mostly air-free, close all air vents (tighten caps securely); this includes vents
at each rack (
Figure 23) and auto air vents on the main headers.
6. Conduct a Fluid Pressure Test.
a. Pressure test the system with water at city pressure for six hours or according to local codes.
b. Check for leaks.
7. Add a water corrosion inhibitor.
• The use of a closed system treatment (CST) is strongly recommended. CST is available from
Terlyn Industries at 800-200-4112 or
www.terlyn.com.
• Additional treatment might be required after six to 12 months of operation, depending on the
quality of your water.
Note: Many parameters contribute to water corrosion and erosion, and the requirements stated
above do not guarantee 100% corrosion and erosion prevention. However, when these parameters
are met and a corrosion inhibitor is used, the possibility of corrosion and erosion in the closed loop
water system should be minimized, therefore maximizing the life expectancy of the system.
8. Refill the system by following Steps 1 through 5, then go to Step 9.
9. Turn the unit On by pressing the I/O key.
NOTE
Check with local codes for proper connection to potable water and EPA
conformance.
Do NOT use the hose bib at the bottom of the unit to fill the system (see
Figures 22 and 21).
NOTE
Add water as necessary to maintain a normal level reading.