Installation and Service Manual
THIS MANUAL IS THE PROPERTY OF THE OWNER.
PLEASE BE SURE TO LEAVE IT WITH THE OWNER WHEN YOU LEAVE THE JOB.
Inspection on Arrival
1. Inspect unit upon arrival. In case of damage, report it
immediately to transportation company and your local
Modine 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).
Table of Contents
Inspection on Arrival ................................. 1
Special Precautions ................................. 2
SI (Metric) Conversion Factors......................... 3
Before you Begin ................................... 3
Unit Location....................................... 4
Combustible Material and Service Clearances ......... 4
Unit Mounting .................................. 5
Venting ....................................... 6
Gas Connections............................... 12
High Altitude Accessory Kit . . . . . . . . . . . . . . . . . . . . . 13-14
Electrical ...................................15-16
Operation..................................... 17
Unit Components .................................. 18
Dimensions....................................... 19
Service/Troubleshooting............................. 20
Unit Wiring Diagram ................................ 21
Serial/Model Number/Replacement Parts ............... 22
Commercial Warranty........................Back Cover
INSTALLATION AND SERVICE MANUAL
separated combustion gas-fired unit heaters
model HDS and HDC
6-584.13
5H0800020000
October, 2019
All models approved for use in California by the CEC and
in Massachusetts. Unit heater is certified for residential and
commercial applications. These unit heaters are certifed
as Utility heaters and are intended for the heating of non-
living spaces that are attached to, adjacent to, or part of a
structure that contains space for family living quarters. They
are not intended to be the primary source of heat in residential
applications.
WARNING
1. 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.
2. Do not locate ANY gas-fired units in areas where
chlorinated, halogenated, or acidic vapors are
present in the atmosphere. These substances
can cause premature heat exchanger failure due
to corrosion, which can cause property damage,
serious injury, or death.
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.
FOR YOUR SAFETY
WHAT TO DO IF YOU SMELL GAS:
1. Open windows.
2. Do not try to light any appliance.
3. Do not touch any electrical switch; do
not use any phone in your building.
4. Immediately call your gas supplier
from a neighbor’s phone. Follow the gas
supplier’s instructions. If you can not reach
your gas supplier, call your fire department.
IMPORTANT
The use of this manual is specifically intended
for a qualified installation and service agency. All
installation and service of these units must be
performed by a qualified installation and service
agency.