AIR 1-550.30
OPERATION
7
Connections
— Female-type permits direct connection of unit heater to the
piping. WSC models have malleable connectors at side of the unit.
Vertical fins
— Less opportunity for dust and dirt to collect. Reduces cleaning.
Fins die-formed for added strength and heat transfer.
Coil
— All air passes through coil. Heating is uniform. Design assures maximum
control over air delivery and temperature of air leaving the heater. Aluminum
fins die-formed for added strength — increased heat transfer. Fins mechanically
bonded to serpentine copper tube.
Motor
— All motors are totally enclosed. Single phase types include built-in
thermal overload protection. All motor wiring is terminated in an electrical junction
box either supplied on the unit heater or as an integral part of the motor.
Fan
— Lightweight. Blades accurately balanced and pitched to move air quietly
and positively — with minimum power requirement.
Safety fan guard
— Standard equipment. Bolted steel rod fan guard completely
surrounds the fan offering constant protection.
Deflector blades
— Adjustable horizontal air-deflector blades are standard —
vertical blades are optional.
Casings
— Electrostatically applied, gray-green polyester powder coat paint
finish is applied over rust- and corrosion-treated steel for long life.
Motor-Cooling Cone
— Shields
motor from coil heat — prolongs life
of insulation, windings, and lubricant.
Prolongs motor life.
Coil
— Aluminum fins mechanically
bonded to tubes for maximum heat
transfer. All steam- and water-
carrying passages between heavy
steel pipe connections are copper, or
cupronickel.
Motor
— All motors are totally
enclosed. Single phase types include
built-in thermal overload protection.
Fan
— Accurately balanced to
operate quietly and at lowest possible
power consumption.
Junction Box
— Easier installation
with single point electrical connection.
Motor easily removable
— Modine
design permits motor to be removed
through opening below the unit —
especially important where heaters are
installed close to ceiling.
Vertical fins
— Less opportunity for
dust and dirt to collect. Exposed for
easy cleaning with air hose and brush.
Casings
— Electrostatically applied,
gray-green polyester powder coat paint
finish applied over rust- and corrosion-
treated steel lasts longer.
Figure 7.1 - Horizontal Delivery Unit Cutaway
Figure 7.4 - Vertical Delivery Unit Cutaway
Figure 7.2 - Typical Horizontal Unit with Standard
Junction Box
Figure 7.3 - Horizontal Unit with Optional
Fingerproof Fan Guard