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Preface and Warnings and Cautions
© 2007 American Standard All Rights Reserved UH-SVX01A-EN
Hazard Identification
Warnings and Cautions appear at
appropriate sections throughout this
literature. Read these carefully.
ƽWARNING
Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.
ƽCAUTION
Indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury. It
may also be used to alert against
unsafe practices.
CAUTION
Indicates a situation that may result
in equipment or property-damage
only accidents.
ƽWARNING
Operational Hazards!
Improper installation, adjustment,
alteration, service or maintenance
can cause property damage, injury or
death. Read the installation,
operating and maintenance
instructions thoroughly before
installing or servicing this
equipment.
ƽWARNING
Compliance Hazards!
Failure to comply with the general
safety information may result in
extensive property damage, severe
personal injury or death.
ƽWARNING
Unit Alterations!
Do not alter the unit heater in any
way or damage to the unit and/or
severe personal injury or death may
occur!
ƽWARNING
Voltage Hazard!
Disconnect all power supplies before
installing or servicing the heater. If
the power disconnect is out of sight,
lock it in the open position and tag it
to prevent unexpected application of
power. Failure to do so could result in
fatal electric shock, or severe
personal injury.
ƽWARNING
Voltage Hazard!
Do not depend upon a thermostat or
other switch as sole means of
disconnecting power when installing
or servicing heater. Always
disconnect power at main circuit
breaker as described above. Failure
to do so could result in fatal electric
shock.
CAUTION
Equipment Damage!
Insure that all power sources
conform to the requirements of the
unit heater or damage to the unit will
result!
Follow installation instructions
CAREFULLY to avoid creating unsafe
conditions. All external wiring must
conform to applicable current local
codes, and to the latest edition of the
National Electric Code ANSI/NFPA
No. 70. In Canada, all external wiring
must conform to the Canadian
Electric Code, Part 1 CSA Standard
C22.1 All wiring should be done and
checked by a qualified electrician
using copper wire only. All steam
and hot water connections should be
made and leaktested by a suitably
qualified individual, per instructions
in this manual. Also follow
procedures listed on the “Unit
Equipment Start-Up Sheet” located
in this manual.
Make certain that the power source
conforms to the electrical
requirements of the heater.
Special attention must be given to
any grounding information
pertaining to this heater. To prevent
the risk of electrocution, the heater
must be securely and adequately
grounded. This should be
accomplished by connecting a
grounded conductor between the
service panel and the heater. To
ensure a proper ground, the
grounding means must be tested by
a qualified electrician.
Do not insert fingers or foreign
objects into the heater or its air
moving device. Do not block or
tamper with the heater in any
manner while in operation or just
after it has been turned off, as some
parts may be hot enough to cause
injury.
Note: To meet CSA and OSHA
requirements, units mounted
below 8 feet (2.4m) from the
floor must be equipped with
an OSHA fan guard.
It is good practice to have a shutoff
switch on the electrical power lines
controlling the heater. Whenever a
unit is serviced, shut power off to the
unit.
Since these units are installed in
most instances higher than 8 feet
(2.4m), proper type of ladders or
scaffolding should be used, as set up
by OSHA requirements. It is the
owner’s responsibility to provide any
scaffolding or other apparatus
required to perform emergency
service or annual/periodic
maintenance to this equipment.
In industrial plants, professional
maintenance crews should service
this equipment.
All Horizontal Unit Heaters are
shipped fully assembled and may be
used for steam or hot water
applications. Coils are factory tested
at 250 psig (1723.5 kg).
All Vertical Unit Heaters are shipped
fully assembled and may be used for
steam or hot water applications.
Coils are factory tested at 400 psig air
under water. Fans are balanced and
motors are prelubricated.
Unless otherwise specified, the
following conversions may be used
for calculating SI unit measurements:
1 foot = 0.305 m
1 inch = 25.4 mm
1 psig = 6.894 kPa
1 pound = 0.453 kg
1 gallon = 3.785 L
1 inch water column = 0.249 kPa
meter/second = FPM ÷ 196.8
liter/second = CFM x 0.472
1000 Btu per hour = 0.293 kW
1000 Btu/Cu. Ft. = 37.5 MJ/m
3
1 cubic foot = 0.028 m
3