Nortec MHTC User Manual

Evaporative Humidifier / Cooler Nortec MH Series

Is a sustainable solution for both humidifying and cooling. Nortec’s MH series is an evaporative humidifier based on the adiabatic
principle that results in air humidifying and cooling. Its innovative design is specifically engineered for Air Handing Units (AHU) or
ventilation duct systems and is a perfect compliment towards GREEN/LEED building design.

Model MHTC REflow Modulation

The circulation pump conveys the water in the latter via EPDM plastic hoses to the spray beam located above the humidifier box.
The water then trickles vertically through the boxes. The water not needed for humidifying flows back into the water basin where it
is collected and recirculated for optimal water efficiency. The low-energy Nortec MH Series is an ideal design for integration into a
central air conditioning system.

Nortec MH characteristics at a glance:

Humidifier media box made of polyester free of glass fibre with an impressed V-Profile for an efficient and healthy way

of humidifying and cooling
Simple and uncomplicated installation
Low installation and operational costs for short and long-term facility cost reductions
Short water basin depth made of stainless steel material with multi-sided gradients for effective drying of the

humidifier.
Water management integrated in the MH control system unit for optimising water consumption and humidity control
Operation for all water quality types: potable, softened, reverse osmosis (R/O) and fully-de-ionized (D/I) water
Adiabatic evaporation cooling of over 21.5° F (12°C) can be achieved

Ultra violet water treatment available

The electronic control is an integral part of the humidifier. It enables operation free of malfunctions and optimises control accuracy
and water consumption.

The short stainless steel water tank depth will reduce on the overall footprint, saving valuable air handling real estate. There are
lateral two guide tracks with suspension fixtures for the humidifier media boxes and mist eliminators to be easily installed.
Integrated water management system consists of water distributors with flow regulators for setting consistent water flow volumes,
a circulation pump, stainless steel water distribution hoods, electrical inlet valves, electrical step control valves and electronic
control for optimum water efficiency and humidity control.

Humidifying Media Box

The core element of the MH series is the patented polyester media box located in the air duct. Dry air flows through the box, water
flows over the hygroscopic media and the extremely large wet surface releases humidity to the air. This method enables air
humidifying or cooling with substantially limiting the use of electrical energy.

The V-Profile humidifier box consists of a polyester material with an impressed V-Profile, which enables a more intensive
exchange of air and water. The polyester box is free of glass fibre and is fire protected in compliance with UL 900 Class 1
certification. This not only makes it perfectly safe with regards to health, but also ensures a longer service life compared to the
rational cellulose or fibre glass media.

V-Profile Media Media Box

Key benefits of the innovative V-Profile humidifier media box:

Low Pressure Drop
Hygroscopic Coating
UL 900 Class 1 Rating
High Velocity Performance
Suitable for all Water Quality
No Droplets, Free of Aerosols

MHTC - Total Control System

The MH control unit controls the humidity and governs the water management to maximize efficiency. The integrated processor
with real-time clock controls the air humidity, pre-cleaning sequences, unit purging and water quality control, all fully automatically.
The controller is designed for connection to building management systems (BMS). This means that parameters such as
humidifying requirement, water consumption, maintenance requirement or operating hours can be transmitted further via modbus,
LON Talk or BACnet with LINKS2.

The electronic control cabinet includes electrical fusing and main power switch.
One, two or three stage control through magnetic staging valves is available. Microprocessor PI-controlled analog humidity signals
for flexibility. Controlled flushing of the water tank in function of the filling cycles or time controlled drainage through the integrated
real time clock. Programmable wash cycle for cleaning the humidification media. Automatic flushing of the water lines at the end of
a season shutdown or without a call for humidity. An automatic forced drain after shutdown periods longer than 72 hours, an
interruption in humidifying requirement of over 72 hours or in the case of a power failure.

TC Total Controller Management System

Key Benefits:

Smart Water Management
Advanced Hygiene Control
Capable of Monitoring & Control via Internet or BMS
Full Functional Operating Panel
Adjustable Flush Cycles
Pre-Cleaning Sequence
Programmable Maintenance
Conductivity Monitoring
UV Sensing

14.31

17.61

16.75

12.00

Available Options and Accessories

UV water treatment
Conductivity Monitoring Sensor

Pressure reduction valve (building side) consult factory
P/N 1329505 - In-Line Water filter c/w 5 micron filter

Nortec On/Off Controls:

P/N 1329203 - Switch Air Proving (duct airflow safety interlock)

Nortec Modulating Demand Controls:

P/N 25202660 - 10V Dig. Duct Humidistat pkg
P/N 15101420 - 10V Digital Wall Humidistat

Nortec Transducer Sensor Controls:

P/N 1509858 - 2-10V Dig Wall Humidity Sensor
P/N 1509857 - 2-10V Duct Humidity Sensor

Nortec LINKS2 and Nortec Online please consult factory

MHTC REflow Technical data

Humidifying output see performance data
Power consumption w/UV 0.60 kW
Power consumption w/o UV 0.50 kW
Primary voltage 120/1/60 V/Ph/Hz
Control voltage 24V ac Modulation
Water mains pressure 30..145 psi
Water connection 3/4 "
Water drain 1 ½ “
Width/Height/Depth See performance data

Make Nortec
Type MHTC REflow
Manufacturer Walter Meier Climate Canada Inc.

(TC) Total Controller System Mounting Dimensions