Enviro DDR Installation Operation & Maintenance
DUAL DUCT VAV TERMINALS
INSTALLATION, OPERATION & MAINTENANCE
Supersedes: ET130.13-NOM2 (615) Form ET130.13-NOM2 (819)
MODEL DDR
FORM ET130.13-NOM2 (819)
SAFETY SYMBOLS
The following symbols are used in this document to alert the reader to areas of potential hazard:
DANGER indicates an imminently
hazardous situation which, if not
avoided, will result in death or serious
injury.
WARNING indicates a potentially
hazardous situation which, if not
avoided, could result in death or se-
rious injury.
SAFETY CONSIDERATIONS
The equipment covered in this manual is designed for
safe and reliable operation when installed and operated
within its’ design specication limits. To avoid personal
injury or damage to equipment or property while
installing or operating this equipment, it is essential
that qualied, experience personnel familiar with local
codes and regulations, perform these functions using
good judgment and safe practices. See the following
cautionary statements.
ELECTRICAL SHOCK HAZARDS
All power must be disconnected prior
to installation and servicing this equip-
ment. More then one source of power
may be present. Disconnect all power
sources to avoid electrocution or shock
hazards.
HOT PARTS HAZARD
Electric resistance heating elements
must be disconnected prior to servicing. Electric heaters may start auto-
matically; disconnect all power and
control circuits prior to servicing to
avoid burns.
Check that the unit assembly and com-
ponent weights can be safely supported
by rigging and lifting equipment.
CAUTION identies a hazard which
could lead to damage to the machine,
damage to other equipment and/or
environmental pollution. Usually an
instruction will be given, together with
a brief explanation.
NOTE is used to highlight additional
information which may be helpful to
you.
All assemblies must be adequately
secured during lifting and rigging by
temporary supports and restraints un-
til equipment is permanently fastened
and set in its’ nal location.
All unit temporary and permanent
supports must be capable of safely
supporting the equipment’s weight and
any additional live or dead loads that
may be encountered. All supports must
be designed to meet applicable local
codes and ordinances.
All fastening devices must be designed
to mechanically lock the assembly in
place without the capability of loosen-
ing or breaking away due to system
operation and vibration.
Secure all dampers when servicing
damper, actuators or linkage. Dampers may activate automatically, discon-
nect the control circuits or pneumatic
control systems to avoid injury.
Protect adjacent ammable material
when brazing. Use ame and heat
protection barriers where needed.
Have re extinguisher ready for im-
mediate use.
2
ENVIRO-TEC
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