6.1.2 Condensate Pump Drain Line Requirements
NOTICE
Risk of water backing up in the drain line. Leaking and overflowing water can cause equipment and building
damage.
Do not install an external trap in the drain line. This line already has a factory installed trap inside the cabinet.
Installation of a second trap will prevent drain water flow and will cause the water to overflow the drain pan.
Sagging condensate drain lines may inadvertently create an external trap.
Observe the following requirements when installing and routing the drain line:
•
The drain line must be located so it will not be exposed to freezing temperatures.
•
Size the piping based on the available condensate head.
•
Drain is trapped internally. Do not externally trap the drain line.
•
The drain line must be rigid enough that it does not sag between supports, which unintentionally creates traps.
•
We recommend installing monitored, under floor leak detection equipment.
Factory Installed Condensate Pump
If your unit includes an optional condensate pump, the pump is factory installed inside the unit and a 3/4 in. copper sweat
connection is provided on the unit.
6.2 Refrigerant Piping and Charging
WARNING! Risk of over pressurization of the refrigeration system. Can cause explosive discharge of high
pressure refrigerant, loss of refrigerant, environmental pollution, equipment damage, injury, or death. This
unit contains fluids and gases under high pressure. Use extreme caution when charging the refrigerant
system. Do not pressurize the system higher than the design pressure marked on the unit's nameplate.
CAUTION: Risk of excessive refrigerant line pressure. Can cause equipment damage or injury resulting from
tubing and component rupture. Do not close off the refrigerant-line isolation valve for repairs unless a
pressure relief valve is field installed in the line between the isolation valve and the check valve. The
pressure relief valve must be rated 5% to 10% higher than the system design pressure. An increase in
ambient temperature can cause the pressure of the isolated refrigerant to rise and exceed the system design
pressure rating (marked on the unit nameplate).
Consult local building and plumbing codes for installation requirements of additional pressure relief devices when isolation
valves are field installed. Do not isolate any refrigerant circuits from over pressurization protection.
Maximum Design Operating Pressure (High Side)
530 psig
3655 kPa
Noted on the unit serial tag
High Pressure Cut Out Safety Switch
580 psig
4000 kPa
Nominal
Table 6.4 System Refrigerant Pressures
Vertiv | Liebert® DSE Thermal Management System Installer/User Guide
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