Trane 8.0 to 705.6 MBh Catalogue
Propeller Unit
Heaters/Unitary
8.0 to 705.6 MBh
Two Versatile Models - Various Sizes
Easy Installation
August 2007 UH-PRC001-EN
The square, compact design of the
Model P and rectangular Model S
allow easy handling and installation.
In most cases, only one person is
needed to carry a unit.
What’s more, the Model P can be
stored standing on end. This means
several units can be loaded on a
single skid for moving from one point
to another.
Yet, the benefits of this compact
design go beyond ease of
installation. They continue with
attractive styling. The Model S unit’s
simple, clean-line symmetry and the
Model P unit’s classic modern shape
enhance any industrial facility.
Introduction
© 2007 American Standard All rights reserved UH-PRC001-EN
Contents
Model Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Features & Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Application Consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Steam Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Hot Water Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Technical & Mounting Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Motor Characteristics Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
UH-PRC001-EN 3
Model Number Description
UHSBA181TAA101A0A0A
12345678910111213141516171819
Service Model Number
Description
DIGIT 1,2,3 — PRODUCT TYPE
UHP
UHS
DIGIT 4— DEVELOPMENT
SEQUENCE
B
DIGIT 5, 6, 7—CAPACITY/COIL
TYPE
Hot Water Only "Serpentine Type
Coil" Model S
A08 8,030 BTU/HR
A18 18,400 BTU/HR
A25 24,800 BTU/HR
A36 35,900 BTU/HR
Steam or Hot Water "Header
Type Coil" Model S
018 18,000 BTU/HR
024 24,000 BTU/HR
036 36,000 BTU/HR
048 48,000 BTU/HR
060 60,000 BTU/HR
072 72,000 BTU/HR
084 84,000 BTU/HR
096 96,000 BTU/HR
108 108,000 BTU/HR
120 120,000 BTU/HR
132 132,000 BTU/HR
144 144,000 BTU/HR
156 156,000 BTU/HR
180 180,000 BTU/HR
204 204,000 BTU/HR
240 240,000 BTU/HR
280 280,000 BTU/HR
300 300,000 BTU/HR
360 360,000 BTU/HR
Steam or Hot Water Model P
042 42,000 BTU/HR
064 64,000 BTU/HR
080 80,000 BTU/HR
102 102,000 BTU/HR
122 122,000 BTU/HR
146 146,000 BTU/HR
166 166,000 BTU/HR
202 202,000 BTU/HR
252 252,000 BTU/HR
280 280,000 BTU/HR
336 336,000 BTU/HR
384 384,000 BTU/HR
500 500,000 BTU/HR
600 600,000 BTU/HR
720 720,000 BTU/HR
DIGIT 8—VOLTAGE
1 115/1/60
3 230/1/60 (115 V motor with
Trans fo rme r)
4208/3/60
5230/3/60
6460/3/60
7 575/60/3 (Totally Enclosed)
(P only)
DIGIT 9 - MOTOR TYPE
E Explosion Proof
T Totally Enclosed
DIGIT 10- DESIGN SEQUENCE
A
DIGIT 11- TUBE MATERIAL
A Copper
B Steel (P only)
DIGIT 12- FAN GUARD
0 Standard Fan Guard
1 OSHA Fan Guard
2 Standard Fan Guard with
Shelf Mount
DIGIT 13 - SPECIAL COATING
0 No Special Coating
A Phenolic Coating (Baked)
BEpoxy
C Epoxy Phenolic
DIGIT 14 - DISCONNECT SWITCH
0None
1 Disconnect switch
DIGIT 15 - THERMOSTATS (LINE
VOLTAGE)
0None
A Light Duty TSTAT w/ subbase
Line Volts 8 Amps
B Heavy Duty TSTAT w/
subbase
DIGIT 16 - THERMOSTAT COVER
0None
A Locking Thermostat Cover
DIGIT 17 - Manual Starter
0None
AManual Starter
DIGIT 18 - STEAM & HOT WATER
CONTROL
0None
1 Strap on Hot Water Control
2 Steam Pressure Control
(Open on rise in pressure)
3 Steam Pressure Control
(Close on rise in pressure)
4 5.0 Amp Speed Control
Switch ( Capacities A08- 108
only)
5 Options 1 and 4
6 Options 2 and 4
7 Options 3 and 4
DIGIT 19 - VERTICAL LOUVER
0None
A Vertical Louver
B Louver Cone Diffuser (P only)
C Louver Cone Diffuser w/
Coating (P only)
4 UH-PRC001-EN
Features & Benefits
Features & Benefits: Overview
Trane propeller unit heaters feature
the largest selection of standard
sizes from any line in the industry. In
fact, vertical Model P and horizontal
Model S unit heaters provide
enough ‘off-the-shelf’ selections to fit
almost any application.
The versatile two-in-one Model P is
available in 15 sizes with capacities
from 41.3 MBh to 705.6 MBh. The
companion standard and bypass
Model S is available in 23 sizes with
the capacities from 8.0 MBh up to
360 MBh. Both are designed for
durability, attractiveness and
compactness. These features
combined with economical
operation, give strategically sized
Trane unit heaters an edge
unmatched by any other
manufacturer.
Two Units in One – The
Versatile Model P
The Trane Model P can be quickly
field converted from standard to low
final temperature PL design simply
by removing the unit’s patented
knockout air ports. This unique
two-in-one design allows the
stocking wholesaler to cut
inventories in half and still meet
most customer application
requirements.
Patented Trane louver cone diffusers
allow directional flexibility of heated
air.
from 8.0 to 35.9 MBh and is ideal for
applications where clearance is
limited.
The Heavy-Duty Model S
The versatile Header-Type unit can
be used with either steam or hot
water systems and is available in
capacities from 18.0 to 360.0 MBh.
Rugged cast brass headers and
mechanically bonded fins provide
reliable heating to suit a wide variety
of solutions.
Note: Vertical louvers are available
for all Model S units to put
heat where it’s needed.
phase configuration, and threephase explosion-proof motors, see
the motor data-portion of the
Performance Data chapter for
availability.
Fan Guards
All models with standard (non
explosion-proof) single phase 115 or
230 volt motors utilize a wire fan
guard as a motor mount. (Optional
OSHA type guards are also
available.) All models with threephase or explosion-proof motors are
shelf-mounted. Standard type fan
guards can be added as an optional
accessory.
Horizontal and Vertical Louvers
Horizontal louvers are standard on
all models. Vertical louvers are an
optional accessory on all models.
Vertical louvers are installed on built
to order units or shipped loose for
field installation.
Thermostats
Two, line voltage wall thermostats
are in stock for immediate shipment.
All models operate in a 45-85 degree
F range (7-28 degree C). Standard
duty model with “fan control” and a
heavy duty model with “auto-offfan” switching are available. Other
models available on request. Plastic
tamperproof one size fits all
thermostat guards are also available.
Strap-on Water Control
A SPDT strap-on type hot water
control with 100° to 240°F (38 to
116°C) rated at 10 amps at 120V is
also available. Control can be used
for direct or reverse acting
applications as a high or low limit.
Horizontal Unit Heaters
Construction and Features
The Space Saving Model S
The Side Connection type Model S
unit features functional styling in a
space-saving design. This hot water
unit heater is available in capacities
UH-PRC001-EN 5
Motors
115 volt, single speed motors are
standard. Most models can be
supplied with single phase,
explosion proof motors. For
standard motors in 230 volt or three-
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 surfacemounted.
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.
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.
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.
Vertical units are available in fifteen
sizes for steam or hot water heating.
Steam capacities range from 140 to
6 UH-PRC001-EN
Figure 1.
Application Consideration
General Rules
In locating or spotting Trane
Propeller Unit Heaters – either the
Model S Horizontal or Model P
Projection Unit Heater – the
following general rules should be
considered.
1. Spot units at points of greatest
heat loss. Blanket outside
doorways effectively and
provide ample coverage for
exposed window areas.
2. Units, especially in the case of
the Model S Horizontal Unit
Heater, should be arranged to
blow toward or along exposed
walls, preferably striking the
wall at a slight angle so that the
heated air exerts a wiping effect
along the wall. Balance of units
required to supply Btu
requirements should be spaced
strategically in balance of the
area.
3. Unit heaters should be arranged
to blow into open spaces such as
aisles and not directly at any
worker. An exception to this rule
involves the use of the Model P
Unit Heater equipped with the
Louver Cone Diffuser. This
combination can be used
effectively over closely spaced
bins or machines without regard
for open space. But not even the
Model P Unit Heater with Louver
Cone Diffuser should be in such
close proximity to the workers to
cause discomfort.
4. The Trane solid-state speed
control will provide maximum
capacity flexibility and quieter
operation. Note that this speed
controller is available only on
selected models.
5. Mounting heights and distance
of throw recommendations as
given elsewhere in this catalog
should be carefully observed.
6. In the case of Model P Units,
they should be spotted so that
they will most effectively
prevent stratification of
excessively warm air at the
ceiling. By carefully observing
this rule, this type of unit may be
used between seasons to tap
waste heat at the ceiling and
drive it down to occupied zones,
thereby eliminating the need for
added heat on the system.
7. Do not spot units close to any
obstruction that will impede the
full and natural air delivery of
the unit.
Figure 2. The floor plan and elevation of a typical industrial building
showing how a Trane Unit Heater System will heat various parts. Where
ceilings are high in the main manufacturing section, large Projection Heaters
without diffusers are used. Where ceilings are exceptionally high, as in crane
bays, Model P Units with Louver Cone Diffusers provide up to 45% greater
throw to top the “ceiling heat reservoir.” Model P Units with half closed Louver
Cones blanket doorways. Model S Units with Louver Fins blanket windows.
Typical Factory
In the typical industrial building,
where ceilings are high, Model P
Unit Heaters may be used without
diffusers.
In plants where the ceilings are
exceptionally high, such as in crane
bays as illustrated in Model P Units
with Louver Cone Diffusers can
UH-PRC001-EN 7
increase the downward projection of
heat by as much as 45% over units
without diffusers.
Model P Units with the Louver Cone
Diffusers can also be used to blanket
doorways effectively, as shown in
Figure 2 by simply adjusting half of
the louvers vertically, and half closed.
Model S horizontal-type units are
ideal for mounting in plant areas
where ceilings are low. In fact, due to
the extremely small height of the
Model S, and because all piping
connections are made at the back of
the unit, the Model S provides a
greater saving in headroom than
other horizontal unit heater makes.
As illustrated in Figure 2, the Model S
Unit Heaters may be mounted
conveniently from the ceiling, or
from building structural supports and
beams. With Louver Fin Diffusers,
they are ideal for blanketing
windows, and Model S “Bypass”
Unit Heaters, provide further
flexibility of application where
greater throw and more effective
distribution of air in the living zone is
required.
Application Consideration
Figure 3.
Horizontal and Vertical Unit
Heater Piping and Instalation
The illustrations in this portion of the
catalog depict five different typical
piping configurations. Proper
selection should be based on the
operational characteristics of the
source supply. For selection and
sizing of piping, traps, filters and
other piping specialities, ASHRAE
guides and specialty manufacturer's
literature should be consulted. We
assume that the type and total design
of systems has been selected or
approved by a qualified engineer.
The installation and service manual
should be consulted for further
information on installation,
operation, drainage and system
cleaning.
Piping and installation is typical for
both horizontal and vertical unit
heaters – except side connections.
Figure 4.
"LOW PRESSURE STEAM GRAVITY"
SUPPLY
RETURN
AIR VENT
PITCH UP
GATE VALVE
CHECK VALVE
MIN. SIZE 3/4
10" MIN. (254 MM)
GATE VALVE
PITCH UP
D-6059
8 UH-PRC001-EN
Application Consideration
LVE
VA
ATE
G
Figure 5.
"HIGH PRESSURE STEAM"
U
S
PITCH UP
LY
PP
BUCKET TRAP
(WITH AIR BYPASS)
ATE V
G
TU
RE
ALVE
STRAINER
PITCH UP
N
R
K
C
O
T C
PE
D-6058
Figure 6.
UH-PRC001-EN 9
Application Consideration
PET COCK
(SYSTEM VENT)
RETURN
GATE VALVE
SUPPLY
"FORCED HOT WATER"
(Serpentine Units)
Figure 7.
GATE VALVE
DRAIN VALVE
D-6057
10 UH-PRC001-EN
Selection Procedure
Trane Propeller Unit Heaters
Both Model S and Model P Propeller
Unit Heaters are ideally suited to
such a wide variety of installations
that there can be no hard and fast
rules regulating their selection. In
determining the type and size of the
units for any building, the following
points are generally considered:
BTU Requirements
While the choice of units depends
upon several important factors, the
total Btu requirement is usually
determined first. In calculating heat
loss, methods as recommended by
the ASHRAE Guide may be used, or
any other procedure which is known
to be acceptable.
Type of Building
Once the total Btu requirement is
known, the type of building together
with its architecture and its purpose
is considered.
In the many cases where a
combination of space characteristics
is found, a combination of Model S
and Model P Unit Heaters may be
used to create the most satisfactory
heating system.
The Model P Unit Heater has the
natural ability to tap the reservoir of
heated air which collects at the
ceiling level and return it to active
service in the floor zone.
The Model P can be used on either
high or low ceilings. From high
mounting positions the Model P will
allow ample clearance for moving
objects and can project heat down
into occupied areas regardless of
obstacles which would restrict the
flow of air from horizontal units.
From low mounting positions the
Model P, with proper diffusion, can
be used without disturbing nearby
occupants with direct blasts of high
velocity heated air, or requiring
return lines so low as to leave
insufficient head room.
The superior horizontal action of the
Model S, on the other hand, is ideal
for creating a wiping effect of warm
air along exposed walls which
neutralizes drafts at their source,
beaming heat down narrow aisles
and production lines, and blanketing
large windows, doors and other
points of high heat loss.
Spacing of Units
It is the usual practice to divide the
building into areas with like
exposures, or in relation to heat load
distribution desired.
In general, Model S Unit Heaters
may be selected for buildings where
direct horizontal air currents are
desired and where there are no
obstacles to interrupt the flow of air
from the heaters.
Model P Unit Heaters are
successfully used where high or low
mounting heights are required and
should ordinarily be specified with
diffusers, depending upon the
mounting height and application.
Mounting Heights
The maximum effective mounting
height is determined by the outlet
temperature of the air, the outlet
velocity, the cfm for which the heater
is designed, and if a diffuser is used
– the setting of its blades.
The higher the outlet temperature of
the air, the more difficult it is to force
it down into the living zone.
The cfm also affects the mounting
height as a large volume of air will
travel farther than a small volume
under the same initial conditions of
temperature and velocity.
In the preliminary planning stages, it
is well to remember that the lowest
possible mounting height is
desirable in order to get the most
heat down to the floor line and to
allow the greatest possible diffusion
adjustment to provide tailor-made
distribution for each area.
In providing for the use of diffusers
please remember, adjustment of a
Louver Cone Diffuser to deflect the
air toward the horizontal
immediately lowers the mounting
height limit. Adjustment for lateral
deflection with the Louver Fin
Diffuser shortens the distance of
throw.
Diffusion
The use of Trane Louver Cone or
Louver Fin Diffusers influences the
selection of units in two principal
ways: First: It is seldom necessary to
install oversized heaters to extend
the maximum effective mounting
height of the Model P or the distance
of throw of the Model S. Conversely,
Trane Diffusers enable extremely low
mounting since the adjustable
blades direct heat where it is wanted
without creating uncomfortable hot
spots near the units.
Second: After the original selection
has been made, units may be located
with confidence because
adjustments in heat distribution are
possible to accommodate future
changes or unforeseen draft
conditions.
Air Changes
Better diffusion and more even
temperatures can be maintained in a
heated space when the rate of air
recirculation through the heaters is
relatively high. For buildings where
large numbers of people are
engaged, it is desirable to provide
for a greater number of air changes
than for sparsely occupied areas. A
greater number of small units are
used where wide diffusion and even
temperatures are necessary. A few
centrally located units of large
capacity would be used where there
are few occupants.
Comfort Conditions and
Economy
Air circulation, diffusion and spacing
of units are closely related to
economy and comfort in the
selection of unit heaters. The more
units used to provide the required
number of Btu’s, the more
comfortable will be the conditions
for personnel. On the other hand, a
few large units can be selected to
provide plenty of heat at low first
cost, but may be slower in response
and thorough distribution of heat.
Here again, adjustable diffusion
equipment can go a long way toward
saving the buyer first cost expense
while still providing completely
satisfactory comfort conditions.
UH-PRC001-EN 11
Formula
The following formula is used to
arrive at final air temperature volume
when 70 F (Standard Air Basis) is
known or vice versa:
Cfm at final temp. =
460 Fi nal t emp+
Cfmat70F
Cfm at 70 F =
Cfmfinalair
Determining Special Steam
Capacities
Where capacity of the unit under
standard conditions is known – 2 lbs.
steam, 60 F entering air – and it is
desired to know the capacity of this
same unit under different steam and
air conditions, follow instructions
given in Example 1.
Where a set of conditions is given –
Btu, temperature rise, final
temperature, cfm, steam pressure
available, etc. Refer to Example 2.
Useful Data
Btu/240=Sq. Ft. of radiation (EDR)
Sq. ft. of radiation/4=Lbs. of
condensate per hour
Btu/Latent heat=Lbs. of water per
hour
Cfm x Temp. Rise x 1.085 = Btu.
Specific heat of air (70 F) = .241
Specific weight of one cubic foot of
air (70 F) =.075.
Cfm x 60 = cfh.
Therefore, .241 x .075 x 60 = 1.085
------------------------------------------------- -
×
460 70+
460 70+
------------------------------------------------- -
×
460 Fi na l temp+
Selection Procedure
Table 1. Max. Mounting Heights and Distance of throw for Model S Units (based on
2 lbs Steam Pressure 60F entering Air)
Unit
A08* 250 245 91 8 20
A18* 500 500 94 8 25
A25* 590 580 102 9 29
A36* 550 850 99 9 29
018 395 395 102 8 20
024 450 450 109 8 24
036 550 550 119 9 28
048 550 750 119 9 30
060 650 900 121 10 30
072 800 1100 120 10 29
084 900 1400 115 10 30
096 930 1400 123 11 38
108 1000 1800 115 11 40
120 900 1900 118 12 40
132 950 2000 121 13 54
144 1000 2200 120 13 55
156 1150 2600 115 13 55
180 800 2200 135 13 53
204 1000 2900 124 13 55
240 900 3500 123 14 57
280 980 4200 121 14 57
300 700 5000 117 15 58
360 1000 5500 120 15 60
H
Outlet
Velocity CFM
Final Temp
(F)
Mounting
Height Max Throw
Example 1
Given: Model 60S Horizontal
Propeller Unit Heater with a rated
capacity of 60,000 Btu at 2 lbs. steam
with 60 F entering air.
Desired: Capacity of this unit using 15
lbs. steam and 40 F entering air.
Under 40 F and across from 15 lbs. in
Ta ble 2 , we find the factor 1.34.
60,000 x 1.34 = 80,400 Btu per hour.
Determining Amount of
Condensate
To determine the amount of
condensate, divide the capacity in
BTU by the latent heat of steam:
80,400/945=85 lbs per hour.
945=Latent Heat of Steam at 15 psi.
(See Ta bl e 1 2 )
12 UH-PRC001-EN
MAXIMUM DISTANCE OF THROW = T
Determining Final Temperature
Final temperature of air leaving Trane
Unit Heaters may be determined as
follows:
Inlet Air Temp. + Btu rating/Cfm X
1.085=Final Temp
Inlet Air Temp. 40F + 80,400/900
(from Ta ble 7 ) X 1.085=Final Temp
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