Emerson MINI-MATE2 user manual Connections for Ducted Systems, Humidifier Water Supply Line

Site Preparation and Installation

Connections for Ducted Systems

Use flexible duct work or non-flammable cloth collars to attach duct work to the unit and to help control the transmission of vibrations to building structures. Insulation of duct work is vital to prevent condensation during the cooling cycle. The use of a vapor barrier is required to prevent absorption of moisture from the surrounding air into the insulation.

If the return air duct is short or if noise is likely to be a problem, sound-absorbing insulation should be used inside the duct. Duct work should be fabricated and installed in accordance with national and local codes.

Table 7	Evaporator external static pressure
	1.5 hp Motor (60hz)		2.0 hp Motor (60hz)
Turns
	Blower	External	Blower	External
Open	rpm	Static, in.	rpm	Static, in.
1	n/a	n/a	1329	n/a
1.5	n/a	n/a	1296	n/a
2	1037	0.9	1264	n/a
2.5	1005	0.7	1231	1.5
3	972	0.6	1199	1.4
3.5	940	0.5	1164	1.3
4	907	0.4	1134	1.2
4.5	875	0.3	1102	1.1
5	843	0.2	1069	1.0
5.5	810	0.1	1037	0.9
6	778	0.0	1005	0.7

Additional components such as a free-cooling coil, hot water reheat coil or high efficiency filters will reduce available static pressure.

5.4.3Piping Connections and Coolant Requirements Drain Line

NOTICE

Risk of water backing up in the evaporator coil drain line and overflowing the drain pan. Can cause building and equipment damage.

Do not install an external trap in the drain line. This line already has a factory-installed trap inside the cabinet.

This line may contain boiling water. Use copper or other suitable material for the drain line.

A 3/4 in. (19.1 mm) NPT-female connection is provided for the evaporator coil condensate drain. This line also drains the humidifier, if applicable. The drain line must be located so it will not be exposed to freezing temperatures. The drain should be the full size of the drain connection.

The evaporator drain pan includes a float switch to prevent unit operation if drain becomes blocked.

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) copper compression fitting connection for water inlet. Supply pressure range is 10 psig to 150 psig. Required flow rate is 1 gpm (3.8 lpm). A shut-off valve should be installed in this line to isolate the humidifier for maintenance.

NOTE

Do NOT route humidifier supply line in front of filter box access panel.

Liebert® Mini-Mate2™ 18