Munters ML180, User Manual

ML180-MLT350 Dehumidifiers

14

2 Installation

190TGB-1034-A

2.11 Electrical Connections

2.11.1 Mains Supply

WARNING! 

 All electrical equipment connections must be carried out in 

accordance with local regulations and by qualified personnel.

WARNING! 

The unit must never be connected to a voltage or frequency other 

than that for which it was designed and manufactured. Refer to the unit 
identification plate if in doubt.

ML180 & MLT350 dehumidifiers are supplied complete with a pre-
wired mains cable. The cable is fitted with a multi-pin plug suitable for 
connection to a single phase earthed mains socket.

The ML270 is designed for 3-phase AC operation. Each unit is supplied 
complete with all the internal wiring installed and configured in 
accordance with the specified voltage and frequency on the 
identification plate.

ML270

 (only): We strongly recommend that an external isolator be 

installed and placed close to the ML270 unit. The isolator can be used 
to switch of the power to the unit in case of an emergency.

NOTE!

Supply voltage must not vary more than 10% of the specified operating voltage. 
The unit must be adequately connected to earth.

ML270

 (only): The power supply cables must be of the correct size for 

the dehumidifier being installed.

For connection details refer to the 

identification plate

 and 

Electrical 

Circuit Supplement

 or refer to 

section 6.5, Technical Specifications

.

2.12 External Humidistat

ML-Series dehumidifiers are pre-wired so that when the unit is in the 
AUTomatic mode it can be controlled by an externally mounted 
humidistat.

ML180-MLT350 have been designed with a one-step heater, and 
therefore control is limited to switching the unit on and off using a one-
step humidistat.

A low voltage connector (mounted on the side of the unit) is provided 
for electrical connection of a single-stage humidistat. For details refer 
to the units 

Circuit Diagram Supplement

.

2.12.1 Location Requirements

The humidistat should be mounted 1-1.5m above the floor and 
positioned so that it is not exposed directly to dry air from the unit or 
incoming moist air from opening and closing doors. It may not be 
placed close to a heat source or so that it is exposed to direct sunlight.

2.12.2 Electrical Specifications

„

The humidistat connecting cable should have a conductor cross-
sectional area of not less than 0,75 mm

2

and must have an insulation 

resistance rating in excess of 500 VAC.