Vertiv Liebert Mini-Mate MT048 - Drain and Humidifier Piping; Water-supply line to the Humidifier; Drain Line Installation Requirements

4.3 Drain and Humidifier Piping
The following pipe connections are required:
• A drain line from the evaporator-unit drain connection.
• A drain line from the secondary drain pan (if applicable).
• A water-supply line to the optional humidifier (if applicable).
• On air-cooled systems: refrigerant piping connections between the evaporator unit and the
condensing unit. See Piping and Refrigerant Requirements on page15.
NOTICE
Risk of clogged or leaking drain lines and leaking water-supply lines. Can cause equipment and
building damage.
This unit requires a water drain connection. Drain lines must be inspected at start-up and
periodically, and maintenance must be performed to ensure that drain water runs freely
through the drain system and that lines are clear and free of obstructions and in good
condition with no visible sign of damage or leaks. This unit may also require an external water
supply to operate.
Improper installation, application and service practices can result in water leakage from the
unit. Water leakage can result in catastrophic and expensive building and equipment damage
and loss of critical data center equipment.
Do not locate unit directly above any equipment that could sustain water damage.
We recommend installing a monitored fluid-detection system to immediately discover and
report coolant-fluid system and condensate drain-line leaks.
4.3.1 Water-supply line to the Humidifier
The following is required for units with the optional steam-generating humidifier package:
• 1/4-in. (6.4mm) copper compression fitting connection for water inlet.
• The supply pressure range is 10psig to 150psig (69to1034kPa) at 1gpm (3.8(lpm).
• A shut-off valve in the supply line to isolate the humidifier for maintenance.
• Do not supply steam-generating humidifier with softened water.
• Do not use hot water source.
• Water conductivity must be in the range of 330-750micro-siemens.
To install the water supply:
1. Cut the tube square and remove any burrs.
2. Slide nut, then the sleeve on tube. The threaded end of the nut faces the end of the tube.
3. Insert the tube into the fitting, seating it against the stop shoulder and tighten the nut hand-
tight to the body.
4. Use a wrench to tighten the nut 1-1/4 to 2-1/4 turns.
NOTICE
Risk of improper tightening of the piping fittings. Can damage fittings and cause leaks.
Use caution not to over-tighten or under-tighten the piping fittings.
Do not route the humidifier supply line in front of the filter-box access panel.
4.3.2 Drain Line Installation Requirements
NOTICE
Risk of water backing up in the drain line. Leaking and overflowing water can cause equipment
and building damage.
Vertiv | Liebert® Mini-Mate™ Installer/User Guide
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