W arninG
improper installation, adjustment, alteration,
service or maintenance can cause property
damage, injury or death, and could cause
exposure to substances which have been
determined by various state agencies to
cause cancer, birth defects, or other
reproductive harm. read the installation,
operating, and maintenance instructions
thoroughly before installing or servicing
this equipment.
For Your saFetY
iF You smell Gas:
1. open windows (indoor installation only).
2. do not touch electrical switches.
3. extinguish any open flame.
4. immediately call your gas supplier.
PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB.
installation and service manual
THIS MANUAL IS THE PROPERTY OF THE OWNER.
direct-fired make-up air units
models mdB/mrB
Model MDB is ETL certified to
meet the U.S. and Canadian
requirements in the latest version
of ANSI Standard Z83.4, Non-
Recirculating Direct Gas-Fired
Industrial Air Heaters.
For Your saFetY
the use and storage of gasoline or other
flammable vapors and liquids in open
containers in the vicinity of this appliance
is hazardous.
imPortant
the use of this manual is specifically
intended for a qualified installation and
service agency. a qualified installation and
service agency must perform all installation
and service of these appliances.
inspection upon arrival
1. Inspect unit upon arrival. In case of damage, report it
immediately to transportation company and your local
Modine Manufacturing sales representative.
2. Check rating plate on unit to verify that power supply meets
available electric power at the point of installation.
3. Inspect unit upon arrival for conformance with description of
product ordered (including specifications where applicable).
7-500.10
5H0734540001
August, 2018
Model MRB is ETL certified to
meet the U.S. requirements only
in the latest version of ANSI
Z83.18, Recirculating Direct
Gas-Fired Industrial Air Heaters.