Catalogue

6 UH-PRC001-EN
Features & Benefits
Steam Pressure Control
SPST switch opens on a rise in
pressure. Control is automatically
reset, has a range of 0 to 15 PSIG (0
to 103 KPa) and has an adjustable
differential. Other actions, ranges,
circuits and manual reset models
are available on request.
Manual Starters
Single and three-phase models are
available. Standard models are
single-speed, toggle-operated,
NEMA Type 1 and are surface-
mounted.
Wall Mounted Speed Controllers
Units up to S-108 and P-104 with
standard motors (115V) can be
operated at reduced speeds by
addition of optional speed controller.
Controller is 5 amps, pre-set at
factory for maximum and minimum
speeds, with intermediate speeds
infinitely controllable. All 1/3, 1/2 H.P.
and 230V motors operate only at
rated speed and CFM – See tables.
Vertical Unit Heaters
Construction and Features
Vertical projection unit heaters
provide heat where it is required in
commercial and industrial
applications. Mounted near the
ceiling, this unit provides air
circulation and reduces stratification,
without occupying otherwise usable
building space. Units can be
provided with an optional diffuser for
patterned discharge, or, without a
diffuser for higher velocity ‘spot’
heating near doorways and other
highloss areas.
Vertical units are available in fifteen
sizes for steam or hot water heating.
Steam capacities range from 140 to
2,580 E.D.R. (26.0 to 705 MBH) (2 PSI
w/60° E.A.T.). Hot water capacities
range from 18.9 to 519.4 MBH (200°
E.W.T./20° drop w/60° E.A.T.).
Construction
The unit casing is formed by two
square steel plates. The bottom plate
forms an orifice for air delivery. Air
ports are stamped in the top plate of
standard units for easy conversion of
low output units.
Fan
Aluminum blade fans are quiet,
factory balanced and sturdy for
standard or sparkproof applications.
Heating Element
Hot water-steam coils are rectangular
3 or 4-sided, one-pass, multiple
circuit, with aluminum fins
mechanically bonded to the tubes.
Standard coils are seamless copper
tubing. Coils tested at 375 psi under
water. Supply and return connections
are steel pipe. Standard coils have
.025 copper tubing suitable for use
on steam pressure to 75 psi or hot
water up to 225 psi or 325°F.
Figure 1.
Motors
Standard motors are 115/60/1, totally
enclosed, with thermal overload
protection for all units through size P-
280. Standard motors for sizes 42, 64
and 80 are shaded pole, sleeve
bearing. The P-102 motor is
permanent split capacitor type with
sleeve bearings. Motor for unit sizes
122 through 280 are permanent split
capacitor types with permanently
lubricated ball bearings. Motors used
on unit sizes 336 through 720 are 230/
460/60/3, totally enclosed, with
permanently lubricated ball bearings.
Unit sizes smaller than 336 are also
available with 230/460/60/3 motors.
All motors fractional H.P. and integral
H.P., have Class “B” insulation. The
115/60/1 motors used as standard on
unit sizes 42 through 102 can be
operated at multiple speeds with the
addition of a solid-state control.
All units are available with 1140 rpm
explosion-proof motors.