1
B51242-002
HMD IO&M
Receiving and Inspection
Carefully inspect the unit and accessories for any dam-
age and shortage immediately upon receipt of the unit.
• Turn the blower by hand to ensure it turns freely and
does not bind.
• Record on the Delivery Receipt any visible sign of
damage.
Handling
Lift unit fans by the lifting eyes.
NOTICE! Never lift by the housing.
Storage
If the fan is stored for any length of time prior to installa-
tion, store it in its original shipping crate and protect it from
dust, debris and the weather.
Rotate the wheel several revolutions every three to five
days to keep a coating of grease on all internal bearing
parts.
®
HMD
Heated Makeup Direct: A Direct Fire Make-Up Air Unit
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Lifting
eyes
Rotating Parts & Electrical Shock Hazard:
Fans should be installed and serviced by qualified person
-
nel only.
Disconnect electric power before working on unit (prior to
removal of guards or entry into access doors).
Follow proper lockout/tagout procedures to ensure the unit
cannot be energized while being installed or serviced.
A disconnect switch should be placed near the fan in order
that the power can be swiftly cut off, in case of an emergen
-
cy and in order that maintenance personnel are provided
complete control of the power source.
Grounding is required. All field-installed wiring must be
completed by qualified personnel. All field installed wiring
must comply with National Electric Code (NFPA 70) and all
applicable local codes.
Fans and blowers create pressure at the discharge and
vacuum at the inlet. This may cause objects to get pulled
into the unit and objects to be propelled rapidly from the
discharge. The discharge should always be directed in a
safe direction and inlets should not be left unguarded. Any
object pulled into the inlet will become a projectile capable
of causing serious injury or death.
When air is allowed to move through a non-powered fan,
the impeller can rotate, which is referred to as windmill-
ing. Windmilling will cause hazardous conditions due to
unexpected rotation of components. Impellers should be
blocked in position or air passages blocked to prevent draft
when working on fans.
Friction and power loss inside rotating components will
cause them to be a potential burn hazard. All components
should be approached with caution and/or allowed to cool
before contacting them for maintenance.
Under certain lighting conditions, rotating components may
appear stationary. Components should be verified to be
stationary in a safe manner, before they come into contact
with personnel, tools or clothing.
Failure to follow these instructions could result in death or
serious injury.
The attachment of roof mounted fans to the roof curb as
well as the attachment of roof curbs to the building struc-
ture must exceed the structural requirements based on the
environmental loading derived from the applicable building
code for the site. The local code official may require varia
-
tions from the recognized code based on local data. The
licensed engineer of record will be responsible for prescrib-
ing the correct attachment based on construction materi-
als, code requirements and environmental effects specific
to the installation.
This publication contains the installation, operation and
maintenance procedures for standard units of the
HMD:
Heated Makeup Direct
.
Carefully read this publication and any
supplemental documents prior to any
installation or maintenance procedure.
Loren Cook catalog,
Heated Makeup Air Unit
, provides
additional information describing the equipment, fan
performance, available accessories and specification data.
For additional safety information, refer to AMCA
publication 410-96,
Safety Practices for Users and
Installers of Industrial and Commercial Fans
.
All of the publications listed above can be obtained
from Loren Cook Company by phoning (417) 869-6474,
extension 166; by fax at (417) 832-9431; or by e-mail at
.
For information and instructions on special equipment,
contact Loren Cook Company at (417) 869-6474.
