Site Preparation and Installation
19 Liebert
®
Mini-Mate2
™
The optional condensate pump kit is required when the evaporator is installed below the level of the
gravity-fed drain line.
Humidifier Water Supply Line
Units supplied with the optional humidifier package have a 1/4 in. (6.4 mm) compression fitting with
ferrule at the water supply connection Supply pressure range is 10 PSIG to 150 PSIG. Required flow
rate is 1 gpm. A shut-off valve should be installed in this line to isolate the humidifier for
maintenance.
Assembly Instructions
1. Cut tube square and remove cutoff burr.
2. Slide nut then sleeve on tube, threaded end on nut facing end of tube.
3. Insert tube into fitting seating it against stop shoulder and thread nut to body “hand-tight.”
4. With proper wrench tighten 1-1/4 to 2-1/4 turns.
NOTICE
Risk of improper tightening of the piping fittings. Can cause fitting damage and leaks that
can result in building and equipment damage.
Do not over tighten the piping fittings
Chilled Water Loop
On chilled water units, install manual service shutoff valves at the supply and return lines of each
unit. These shutoff valves are used for routine service or emergency isolation of the unit.
Chilled water supply and return lines must be insulated. Insulating them will prevent condensation
of the water supply and return lines to the unit.
The minimum recommended water temperature is 42¡F. Design pressure is 300psig (2068 kPag).
Connection sizes are 7/8 in (22.2mm) OD copper for 3 ton units.
NOTE
Remove any shipping band from the float switch in the evaporator pan before operating unit.
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