UH-PRC001-EN
50
Mechanical
Specifications
Model P
General
The “NRTLC/C” indicator adjacent to the
CSA mark signifies that the product has
been evaluated to the applicable ANSI/
UL and CSA Standards, for use in the
U.S. and Canada.
NRTL, i.e. Nationally Recognized Testing
Laboratory, is a designation granted by
the U.S. Occupational Safety and Health
Administration to laboratories which
have been recognized to perform
certification to U.S. Standards.
Casing
Formed by two square steel plates.
Bottom plate forms orifice for air
delivery. Air ports stamped in top plate
as standard for easy removal for low
final air temperature.
Fan
Trane high efficiency Model A fan with
aluminum blades is quiet, factory
balanced and sturdy for standard or
spark-proof applications.
Model S
General
The “NRTLC/C” indicator adjacent to the
CSA mark signifies that the product has
been evaluated to the applicable ANSI/
UL and CSA Standards, for use in the
U.S. and Canada.
NRTL, i.e. Nationally Recognized Testing
Laboratory, is a designation granted by
the U.S. Occupational Safety and Health
Administration to labortories which have
been recognized to perform certification
to U.S. Standards.
Casing
Two-piece with “picture frame” front
formed into wraparound sides, top and
bottom. Adjustable horizontal louvers
are standard. 18 gauge back panel with
deep-draw fan orifice for extreme
rigidity. Steel supply and return pipe tap
connectors bolted to back. Casings
phosphatized to prevent corrosion and
painted with blue gray baked enamel.
Fan
Trane designed and built high efficiency
Model A fan with aluminum blades is
quiet, factory balanced and sturdy for
standard or sparkproof applications.
Coils
Hot water-steam headerless coils are
single tube, single serpentine on all sizes
except 230 thru 354 which have two
circuits. Fins are aluminum
Sigma-Flo, mechanically bonded to
seamless copper tubing. All coils
one-row deep in air flow direction.
Coils tested at 400 psi air under water.
Standard coils have .031 copper tubing
suitable for use on steam pressures to 75
psi or hot water up to 200 psi or
325 F.
(When Specified) Heavy .049 red brass
tubing suitable for 75 psi steam or 390
deg. F water at 260 psi — .031 cupro-
nickel tubing suitable for 450 deg. F
water at 400 psi — .049 steel tubing
suitable for 450 deg. F water at 400 psi.
(When Specified) Coils with turbulators
(Suffix W) available for high performance
on hot water.
(When Specified) Coils with fin series
132 (Suffix 2) for high performance on
hot water or steam.
(When Specified) Bypass Model S units
with modified coils for air bypass. Unit
sizes have odd numbers (19, 77, 243,
etc.).
Motors
Totally enclosed, 115/60/1 Class “B”
insulated shaded pole and PSC motors
are STD.
1
/
50
through
1
/
8
hp are sleeve
bearing,
1
/
6
through
3
/
4
hp are ball
bearing. All single phase motors have
built in overload protection. Sleeve
bearing motors can be oiled. Ball
bearing motors are permanently
lubricated.
The 115/60/1 motors used as standard on
unit sizes 18S through 100S can be
operated at multiple speeds with the
addition of a solid- state control.
All units available with explosion-proof
motors. Only sizes 18S, 42S, 90S and
126S are available from stock with
115/60/1 explosion-proof motors.
Louver Fin Diffuser
(When Specified) For versatility in lateral
diffusion, used with standard louvers,
provides four-direction control. Ships
separately and clips onto horizontal
louvers.
Coils
Hot water-steam coils are rectangular
3 or 4-sided, one-pass, multiple circuit,
with aluminum Sigma-Flo
®
fins
mechanically bonded to 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.
When Specified) Heavy .049 red brass
tubing suitable for 75 psi steam or up to
425 deg. F water at 300 psi – .049 cupro-
nickel tubing suitable for 75 psi steam or
up to 450 deg. F water at 400 psi – .049
steel tubing suitable for 450 deg. F water
at 400 psi.
Motors
Standard motors are 115/60/1, totally
enclosed, with thermal overload
protection for all units through size 280P.
Standard motors for 42P, 64P and 80P
are shaded pole, sleeve bearing. The
102P motor is permanent split capacitor
type with sleeve bearings. Motor for unit
sizes 122P through 280P are permanent
split capacitor types with permanently
lubricated ball bearings. Motors used on
unit sizes 336P through 720P are 230/460/
60/3, totally enclosed, with permanently
lubricated ball bearings. Unit sizes
smaller than 336P are also available with
230/400/60/3 motors.
All motors fractional hp and integral hp,
have Class “B” insulation. The (115/60/1
motors used as standard on unit sizes
42P through 102P can be operated at
multiple speeds with the addition of a
solid-state control.
All units available with explosion-proof
motors. Only sizes 42P, 64P, 102P and
146P are available from stock with
115/60/1 explosion-proof motors.
Louver Cone Diffuser
(When Specified) Available for complete
versatility in air diffusion patterns.
Adjustable 18-gauge steel blades held in
set position by spring steel clips.
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