Trane Sandp Unit Heaters Catalogue UH PRC001 EN

2015-04-02

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Page Count: 38

8.0 to 705.6 MBh
Contents
Model Number Description
Features & Benefits
Application Consideration
Selection Procedure
Performance Data
Wiring Diagrams
Dimensional Data
Mechanical Specifications

Propeller Unit

Heaters/Unitary

August 2007 UH-PRC001-EN

8.0 to 705.6 MBh

Two Versatile Models - Various Sizes

Easy Installation

Introduction

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.

UH-PRC001-EN 3

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

Contents

4UH-PRC001-EN

Service Model Number

Description

DIGIT 1,2,3 — PRODUCT TYPE

UHP

UHS

DIGIT 4— DEVELOPMENT

SEQUENCE

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

UHSBA181TAA101A0A0A

12345678910111213141516171819

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 former)

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

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)

Model Number Description

UH-PRC001-EN 5

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.

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

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.

Horizontal Unit Heaters

Construction and Features

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-

phase configuration, and three-

phase 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 three-

phase 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-off-

fan” 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.

Features & Benefits

6UH-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.

UH-PRC001-EN 7

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

Application Consideration

8UH-PRC001-EN

Application Consideration

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.

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 3.

Figure 4.

RETURN

SUPPLY

GATE VALVE

"LOW PRESSURE STEAM GRAVITY"

GATE VALVE

AIR VENT

MIN. SIZE 3/4

CHECK VALVE

PITCH UP

10" MIN. (254 MM)

PITCH UP

D-6059

UH-PRC001-EN 9

Application Consideration

Figure 5.

Figure 6.

PITCH UP

RETURN

SUPPLY

PET COCK

GATE VALVE

"HIGH PRESSURE STEAM"

GATE VALVE

BUCKET TRAP

(WITH AIR BYPASS)

STRAINER

D-6058

10 UH-PRC001-EN

Application Consideration

Figure 7.

"FORCED HOT WATER"

(Serpentine Units)

RETURN

SUPPLY

PET COCK

(SYSTEM VENT)

GATE VALVE

DRAIN VALVE

D-6057

UH-PRC001-EN 11

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.

Selection Procedure

12 UH-PRC001-EN

Selection Procedure

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. =

Cfm at 70 F =

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

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 b l e 2 , we find the factor 1.34.

60,000 x 1.34 = 80,400 Btu per hour.

Cfm at 70F 460 Final temp+

460 70+

--------------------------------------------------

Cfm final air 460 70+

460 Final temp+

--------------------------------------------------

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 b l e 1 2 )

Table 1. Max. Mounting Heights and Distance of throw for Model S Units (based on

2 lbs Steam Pressure 60F entering Air)

Unit

Outlet

Velocity CFM

Final Temp

(F)

Mounting

Height Max Throw

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

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 b l e 7 ) X 1.085=Final Temp

UH-PRC001-EN 13

Selection Procedure

Example 2:

Problem: A Trane Model S Horizontal

Unit Heater is desired to deliver

200,000 Btu per hour in a garage

where ventilation is required.

Entering air temperature is 40 F.

Steam at 30 lbs. pressure is available.

Temperature to be maintained is 70 F.

Solution: Under 40 F and across from

30 lbs. in Ta b l e 2 , find the factor 1.51.

Equivalent capacity of required unit

at 2 lbs. steam 60 F entering air is

Required Btu per hour/F=200,000/

1.51=132,500 Btu

From Tabl e 7 , select a Number 132S

Unit Heater with a capacity of

132,000 Btu per hour with standard

coil, and at 2 lbs. steam and 60 F

entering air.

The capacity of this unit at 30 lbs.

steam and 40 F entering air is:

1.51 x 132,000 = 199,300 Btu per hour.

Surplus Capacity

While the ventilation load is being

handled, any air entering the space

over the desired room temperature

should be considered in the heating

calculations. This surplus capacity

can be found by multiplying the

difference between the final

temperature leaving the heater and

the room temperature to be

maintained by 1.085 and that by the

cfm. That amount of heat can be

used to offset heat losses.

Model S

Maximum mounting heights for

Model S Unit Heaters are given in

Ta b l e 1 . When equipped with

standard vertical Louvers, direction

of air flow can be adjusted both

horizontally and vertically.

Mounting the unit at or below

maximum mounting height will

insure that heated air reaches the

living zone.

Model P

Maximum mounting heights for

Model P Unit Heaters are given in

Ta b l e 4 . These distances are figured

from the floor line to the bottom

plate of the unit heater.

Where ceilings are unusually low, a

nearly horizontal flow of air can be

obtained by equipping these units

with Louver Cone Diffusers. The

individually adjustable blades of the

Louver Cone permit an infinite

variety of adjustments to meet any

on-the-job problems. By setting the

blades vertically to straighten the

airstream, as much as 45% increase

in throw can be obtained.

Hot Water Selection Example

Selection Procedure

Select the proper size of unit heater

for whatever application desired, as

illustrated by the following

examples.

Select a Model S horizontal unit

heater to deliver 95 MBH with 220°F

entering water temperature (EWT),

70°F entering air temperature (EAT)

and a 30°F water temperature drop

(WTD).

1. Determine GPM: GPM=Btu/hr/

(485) WTD=95000/485x30=6.53

2. Refer to Table 17 to select the

conversion factor at 220° EWT

and 70° EAT. Factor is 1.06.

3. Determine equivalent MBH at

standard conditions (200° EWT,

60° EAT). Equiv. MBH=MBH/

Factor=95/1.06=89.6.

Table 2. Factors for Determining Steam Capacity of Model S Horizontal Unit

Heaters at Various Pressures and Temperatures (Table based on 2 psig and 60F

entering Air)

Steam Pressure PSIG Temperature of Entering Air (F)

30 40 50 60 70 80 90 100

Blow

Through

Type

0 1.19 1.11 1.03 0.96 0.88 0.81 0.74 0.67

2 1.24 1.16 1.08 1.00 0.93 0.85 0.78 0.71

5 1.29 1.21 1.13 1.05 0.97 0.90 0.83 0.76

10 1.38 1.29 1.21 1.13 1.06 0.98 0.91 0.84

15 1.44 1.34 1.28 1.19 1.12 1.04 0.97 0.89

20 1.50 1.42 1.33 1.25 1.17 1.10 1.02 0.95

30 1.60 1.51 1.43 1.35 1.27 1.19 1.12 1.04

40 1.68 1.60 1.51 1.43 1.35 1.27 1.19 1.12

50 1.70 1.60 1.58 1.50 1.42 1.34 1.26 1.19

60 1.81 1.73 1.64 1.56 1.47 1.39 1.31 1.24

70 1.87 1.78 1.70 1.61 1.53 1.45 1.37 1.29

75 1.90 1.81 1.72 1.64 1.55 1.47 1.39 1.32

100 2.02 1.93 1.84 1.75 1.66 1.58 1.50 1.42

125 2.11 2.02 1.93 1.84 1.76 1.68 1.59 1.51

150 2.20 2.11 2.02 1.93 1.84 1.76 1.67 1.59

To determine the Btu per hour capacity of a Model S Horizontal Unit Heater at any steam pres-

sure and entering air temperature multiply rated capacity at 2 psig steam 60 F entering air

(Table 7) by factor from above table.

4. Select unit size from Tab le 13 .

Select the unit which will provide

89.6 MBH In this example, the

selection indicates a Model S 132

unit heater.

To determine the actual capacity of

this Model S 132 at operating

conditions (220° EWT and 70° EAT)

proceed as follows:

1. Determine the MBH at 6.53 GPM

by applying factor from Ta b l e 2 0 .

Multiply this MBH by the water

flow factor (95.8 MBH X .95=91.0

MBH)

2. Multiply this MBH by the

conversion factor 91.0 X 1.06 =

96,500.

3. The GPM remains constant =

6.53 GPM.

4. Calculate the water temperature

drop WTD=Btu/hr/GPM x 485 =

96,500/(6.53)(485) = 30.5

14 UH-PRC001-EN

Selection Procedure

Note:

To determine the Btu per hour capacity of a Model P projection unit heater at any steam pressure and entering air temperature, multiply rated capacity at

2 psig steam 60 F entering air (Table 8) by factor from Table 3. Factors in italics: Units should not be operated when entering air is below freezing at steam

pressures below 10 psig.

Table 3. Factors For Determining Steam Capacity Of Model P Projection Unit Heaters At Various Pressures And Temperatures

(Table based on 2 PSIG and 60 F Entering Air)

Steam Pressure PSIG Temperature of Entering Air (F)

-10 0 10 20 30 40 50 60 70 80 90 100

Draw-Through Unit

01.49 1.41 1.33 1.25 1.18 1.11 1.03 0.96 0.90 0.83 0.76 0.69

21.52 1.45 1.37 1.29 1.22 1.15 1.07 1.00 0.93 0.86 0.80 0.73

51.58 1.50 1.42 1.34 1.27 1.20 1.12 1.05 0.98 0.91 0.85 0.78

10 1.64 1.57 1.49 1.41 1.34 1.27 1.19 1.12 1.05 0.98 0.91 0.85

15 1.70 1.62 1.55 1.47 1.40 1.32 1.25 1.18 1.11 1.04 0.97 0.90

20 1.75 1.67 1.60 1.52 1.45 1.37 1.30 1.23 1.16 1.09 1.02 0.96

30 1.83 1.75 1.68 1.61 1.53 1.46 1.39 1.32 1.25 1.18 1.11 1.04

40 1.90 1.82 1.75 1.68 1.61 1.53 1.46 1.39 1.32 1.25 1.18 1.11

50 1.96 1.87 1.81 1.74 1.67 1.59 1.52 1.45 1.38 1.31 1.24 1.17

60 2.02 1.94 1.87 1.79 1.72 1.64 1.57 1.50 1.43 1.36 1.29 1.22

70 2.07 1.99 1.92 1.84 1.76 1.69 1.62 1.55 1.47 1.40 1.33 1.27

75 2.10 2.02 1.94 1.86 1.79 1.71 1.64 1.57 1.49 1.42 1.36 1.29

Table 4. Maximum Mounting Heights in Feet for Model P Unit Heaters with and without Louver Cone Diffuser

Unit

Size

Steam Pressure (PSI)

2 5 10 50 75

42-P 10.5

12.5

10.0

12.0

10.0

12.0

9.0

11.0

8.0

10.0

42-P LS* 8.0

9.0

8.0

8.5

8.0

8.5

8.0

42-P-L** 12.5

14.5

12.0

14.0

12.0

13.5

10.5

12.0

9.5

11.5

42-P-L LS 9.0

10.5

8.5

10.0

8.5

10.0

8.0

9.0

8.0

8.5

64-P 12.0

14.5

11.5

14.0

11.5

14.0

10.0

12.0

9.5

11.5

64-P LS 9. 5

11.5

9.0

11.0

9.0

11.0

8.0

9.5

8.0

9.0

64-P-L 15.0

19.0

14.5

18.5

14.5

18.5

12.5

16.5

12.0

16.0

64-P-L LS 11.5

14.0

11.0

13.5

11.0

13.5

9.5

12.0

8.0

11.5

80-P 15.0

18.5

14.5

18.0

14.0

17.5

12.0

15.5

11.5

13.5

80-P LS 11.0

13.5

10.5

13.0

10.5

13.0

9.0

11.5

8.5

11.0

80-P-L 18.0

22.0

17.5

21.0

17.5

21.0

15.0

19.0

14.0

18.0

80-P-L LS 13.0

17.0

12.5

16.5

12.0

16.0

11.0

14.0

10.5

13.5

102-P 14.0

17.0

13.5

16.5

13.0

16.0

11.5

14.0

11.0

13.5

102-P LS 11.0

13.5

10.5

13.0

10.5

13.0

9.5

12.0

9.0

11.5

102-P-L 17.5

21.5

17.0

21.0

16.5

20.5

15.0

18.5

14.5

17.5

UH-PRC001-EN 15

Selection Procedure

102-P-L LS 15.0

18.5

14.5

18.0

14.5

18.0

13.0

16.0

12.5

15.0

122-P 16.0

19.5

15.5

19.0

15.5

18.5

14.0

17.0

13.5

16.0

122-P-L 21.0

26.0

20.5

25.5

20.0

25.0

17.5

22.5

17.0

21.5

146-P 15.5

19.0

15.0

18.5

14.5

18.0

13.0

16.0

12.0

15.5

146-P-L 18.0

22.5

17.5

22.0

17.5

21.5

15.0

18.5

14.0

18.0

166-P 18.0

22.5

17.5

22.0

17.0

21.5

14.5

19.0

14.0

18.0

166-P-L 22.0

27.5

21.5

27.0

21.0

26.5

18.5

23.5

17.5

22.5

202-P 22.0

27.5

21.5

27.0

21.0

26.5

18.5

24.0

17.5

23.0

202-P-L 25.5

31.5

25.0

31.0

24.5

30.5

22.0

27.0

21.0

26.0

252-P 20.0

25.0

19.5

24.0

19.0

23.5

17.0

20.5

16.0

19.5

252-P-L 24.0

29.5

23.5

28.5

23.0

28.0

20.0

24.5

19.0

23.5

280-P 21.0

26.0

20.5

25.5

20.0

25.0

17.5

22.0

17.0

21.0

280-P-L 25.5

32.0

25.0

31.0

24.5

30.0

21.0

26.0

20.0

25.0

336-P 24.0

30.0

23.0

29.0

22.0

28.0

20.0

25.0

19.0

24.0

336-P-L 29.0

36.0

28.5

35.0

28.0

34.0

25.0

30.0

24.0

29.0

384-P 28.5

35.5

28.0

35.0

27.5

34.0

24.0

30.0

23.0

29.0

384-P-L 32.5

41.0

31.5

40.0

30.5

39.0

27.5

35.0

26.5

33.5

500-P 29.5

36.5

29.0

36.0

28.5

35.5

25.0

32.0

24.0

30.5

500-P-L 35.0

43.5

34.0

42.5

33.0

41.5

29.0

35.0

28.0

34.0

600-P 34.0

42.5

33.0

41.5

32.0

40.5

28.0

36.0

27.0

34.5

600-P-L 37.0

46.5

36.0

45.5

35.0

44.5

31.0

39.0

30.0

37.0

720-P 38.5

48.0

37.5

47.0

36.5

46.0

32.0

40.0

30.5

39.0

720-P-L 42.5

53.0

41.5

52.0

40.5

51.0

35.0

44.0

33.5

42.0

Notes:

*LS = Low speed.

**PL = Model P low final temperature model with all air ports open.

Figures in bold face show maximum mounting height with louver cone diffusers set vertically.

To meet CSA and OSHA requirements, Model P Unit Heaters mounted lower than 8.0 ft. from the floor must be equipped with an OSHA fan guard. Table 4

based on 60 F entering air temperature. In providing for the use of diffusers, it must be remembered that adjustment of a LCD to deflect air toward

horizontal immediately lowers the mounting height limit.

Table 4. Maximum Mounting Heights in Feet for Model P Unit Heaters with and without Louver Cone Diffuser (continued)

Unit

Size

Steam Pressure (PSI)

2 5 10 50 75

16 UH-PRC001-EN

Selection Procedure

Additional Selection Data

Motor and Fan Speeds

Motor and fan speeds are selected to

provide efficient performance. The

solid-state speed control will provide

an infinite number of speeds

between the highest and the lowest

cataloged fan speeds. The speed

control is not calibrated in specific

fan speeds. For use on units with 115

volt/60 cycle/1 phase, 1/8 hp and

smaller standard motors only.

Standard and Bypass Units

Standard models meet most

requirements and are most

economical. Bypass units meet

conditions as mentioned above, and

are also used where low final

temperature is specified.

Table 5. Maximum Spread in Feet

Unit Size: P 42 64 80 102 122 146 166 202 252 280 336 384 500 600 720

Spread ft 15 17 20 24 26 27 28 32 35 37 45 50 54 57 60

25 and 50 Cycle Unit Heat

Capacities

Ta b l e 6 shows the Btu, cfm, and the

hp required on unit heaters when

operated on 25 or 50 cycle circuits.

The multipliers in Ta b l e 6 may be

applied to standard 60 cycle unit

capacities to determine the capacities

of the same unit when operating on

25 or 50 cycle current. These

multipliers may be used on units

cataloged at 1050 to 1150 RPM.

For the smaller Trane Unit Heaters

cataloged at 1550 RPM, the capacity

data in the catalog may be applied to

either 25 or 50 cycle service.

Table 6. Factors for Determining Unit Heater Capacities at 25 or 50 Cycles

RPM Multiplier To Be Applied To 60-Cycle 1100 RPM Ratings

25 CY 50 CY BTU CFM HP

1425 1425 1.17 1.25 1.95

950 .87 .833 .572

710 710 .7 .623 .242

UH-PRC001-EN 17

Performance Data

Steam Performance Data

Horizontal Unit Heaters

Performance based on 2# steam pressure at heater with air entering @ 60° F (max working pressure 150 PSI,366° F)

* For the lower output, an optional Speed Controller must be ordered.

For Sound Ratings, see the Technical and Mounting Data-portion of this chapter.

Ta b l e 7.

Model

No.

Total

MBh

Cond.

lbs./hr.

E.D.R.

Sq. Ft. LAT °F

Motor

RPM

Nominal

CFM

Outlet

Velocity

FPM

Sound

Rating

S-18

18,000 18.0 75 102

16 Watts

1550 395 395 II

16,200 16.2 68 105 1350 330 330 I

S-24

24,000 24.5 100 109

16 Watts

1550 450 450 II

21,600 22.0 90 112 1350 380 380 I

S-36

36,000 37.0 150 119

25 Watts

1550 550 550 II

32,400 33.0 135 120 1350 480 480 I

S-48

48,000 49.0 200 119

1/20

1000 750 550 II

43,200 44.0 180 123 900 630 460 I

S-60

60,000 61.0 250 121

1/20

1000 900 650 II

54,000 55.0 225 131 900 700 510 I

S-72

72,000 73.0 300 120

1/20

1000 1100 800 II

64,800 66.0 270 123 900 950 700 I

S-84

84,000 85.0 350 115

1/12

1000 1400 900 III

75,600 76.0 315 123 900 1100 750 II

S-96

96,000 97.0 400 123

1/12

1000 1400 930 III

86,400 88.0 360 132 900 1100 800 II

S-108

108,000 110.0 450 115

1/12

1000 1800 1000 III

97,200 98.0 405 120 900 1500 900 II

S-120 120,000 122.0 500 118 1/3 1140 1900 900 III

S-132 132,000 134.0 550 121 1/3 1140 2000 950 IV

S-144 144,000 146.0 600 120 1/3 1140 2200 1000 IV

S-156 156,000 160.0 650 115 1/3 1140 2600 1150 IV

S-180 180,000 190.0 770 135 1/3 1140 2200 800 III

S-204 204,000 208.0 850 124 1/3 1140 2900 1000 IV

S-240 240,000 244.0 1000 123 1/3 1140 3500 900 IV

S-280 280,000 280.0 1100 121 1/2 1100 4200 980 IV

S-300 300,000 310.0 1250 117 1/2 1100 5000 700 IV

S-360 360,000 366.0 1500 120 1/2 1100 5500 1000 IV

18 UH-PRC001-EN

Performance Data

Vertical Unit Heaters

Performance based on 2# steam pressure at heater with air entering @ 60°F.

Notes:

Constant speed units are rated at capacities shown in regular type; capacities shown in italic faced type apply only to units with multi-speed motors.

** To determine BTU per hour capacities at various steam pressures and entering air temperatures, use conversion factors from Table 11. Final temper-

atures at new conditions can be calculated by applying basic formula.

Table 8. Standard Units

Model

No.

Total

MBh

Cond.

lbs./hr.

E.D.R.

Sq. ft. LAT °F

Motor

RPM

Nominal

CFM

Outlet

Velocity

FPM

Sound

Rating

P-42

41,300 43 172 124

1/40

1550 595 877

33,600 55 140 131 1150 436 658

P-64

65,500 68 273 121

1/20

1550 989 1005

52,800 55 220 129 1150 706 727

P-80

80,600 83 336 122

1/20

1550 1200 1220

65,100 67 271 130 1150 858 894

P-102

101,800 106 424 123

1/8

1070 1490 980

87,900 91 366 129 850 1180 783

P-122 124,400 129 518 124 1/6 1100 1790 1170 III

P-146 152,000 157 633 123 1/6 1100 2220 1045 III

P-166 173,000 179 720 121 1/6 1100 2620 1230 IV

P-202 210,200 208 838 118 1/4 1100 3200 1495 III

P-252 249,800 260 1040 115 1/4 1100 4180 1205 IV

P-280 283,800 294 1180 119 1/2 1100 4430 1275 IV

P-336 333,400 345 1390 119 3/4 1140 5210 1500 IV

P-384 386,000 400 1610 118 3/4 1140 6140 1770 IV

P-500 496,000 514 2070 117 1-1/2 1160 8020 1640 IV

P-600 585,000 605 2440 117 1-1/2 1160 9450 1930 IV

P-720 705,000 729 2940 119 3 1165 11,000 2250 IV

UH-PRC001-EN 19

Performance Data

NOTES:

Constant speed units are rated at capacities shown in regular type; capacities shown in italic faced type apply only to units with multi-speed motors.

**To determine BTU per hour capacities at various steam pressures and entering air temperatures, use conversion factors from Table 11. Final temperatures at new conditions

can be calculated by applying basic formula.

Table 9. Low Output Units: Standard Model Units w/All Air Ports Open

Model

No.

Total

MBh

Cond.

lbs./hr.

E.D.R.

Sq. ft. LAT °F.

Motor

RPM

Nominal

CFM

Outlet Velocity

FPM

Sound

Rating

P-42L

34.8 36 145 108

1/40

1550 668 950

26.0 27 108 111 1150 470 672

P-64L

57.2 59 238 104

1/20

1550 1200 1190

45.8 48 191 109 1150 862 858

P-80L

68.0 71 283 106

1/20

1550 1360 1350

55.0 57 229 111 1150 995 992

P-102L

85.4 89 356 108

1/8

1070 1640 1050

71.2 74 296 111 850 1290 827

P-122L 111.0 115 462 107 1/6 1100 2180 1390 III

P-146L 125.0 130 524 109 1/6 1100 2360 1080 III

P-166L 149.0 154 620 107 1/6 1100 2920 1340 IV

P-202L 176.8 183 736 108 1/4 1100 3390 1560 III

P-252L 214.9 224 895 104 1/4 1100 4500 1270 IV

P-280L 251.8 260 1050 106 1/2 1100 5040 1420 IV

P-336L 291.0 302 1210 107 3/4 1140 5700 1610 IV

P-384L 344.0 356 1430 108 3/4 1140 6600 1870 IV

P-500L 428.0 446 1785 102 1-1/2 1160 9380 1860 IV

P-600L 515.0 533 2140 106 1-1/2 1160 10,300 2060 IV

P-720L 620.0 642 2580 108 3 1165 11,900 2380 IV

Table 10. STEAM CALCULATIONS AND CORRECTION FACTORS

EXAMPLE:

UNIT SIZE __________ P-42

Steam Pressure _____10 PSI

Entering Air Temp. ____ 40°F

I. CAPACITY

A. For 2 lbs. steam, 60° entering air

Read output directly from Ta b le 8 : 41,300 BTU/HR.

B. For higher steam pressures and/or E.A.T.'s above

or below 60°F

Multiply output from Ta b le 8 by appropriate

correction factor from Tab l e 11 .

41,300 x 1.27 = 52,451 BTU/HR.

II. FINAL AIR TEMPERATURE

A. For 2 lbs. steam, 60° entering air

Read temperature directly from Table 8 : 124°F.

B. For capacities calculated in I.B. (above) Output from I.B./1.085 x CFM from Ta b l e 8 +

E.A.T. = Final Air Temp

52,451/1.085 x 595 + 40 = 121.0°F

III. FINAL AIR VOLUME

A. For 2 lbs. steam, 60° entering air

460 + Final Air Temp from Tabl e 8/530 x Nom. CFM

from Ta b l e 8 = Final Air Volume

460 + 124/530 x 595 = 655 CFM

B. For final air temperatures calculated In II. B.

(above)

460 + Final Air Temp from II.B./530 x Nom. CFM

from Ta b l e 8 = Final Air Volume

460 + 121.0/530 x 595 = 652 CFM

IV. CONDENSATE PER HOUR

A. For 2 lbs. steam, 60° entering air

Read lbs. per hour from Tabl e 8 : 43 LBS./HR.

B. For capacities calculated in I.B. (above) Output from I.B./Latent Heat from Tabl e 1 2 = lbs.

per hour of condensate

52,451/953 = 55.0 LBS./HR.

20 UH-PRC001-EN

Performance Data

Note: Ratings apply only to free inlet and discharge without diffusers.

Note: All motors are constant speed and operate at top speed as indicated in motor data. Models 42 through 102 can

be run at reduced speed with addition of optional variable speed switch. This switch is factory-calibrated for low

and high speed ratings, with intermediate speeds infinitely controllable. Models 166 through 720 operate at

constant speed as indicated in motor data.

Note: For specific motor data, refer to motor specifications at the end of this chapter.

Note: To correct for entering air temperatures, use 1° temperature rise for each foot in mounting height. As an

example, 60° air is required at work area (5 ft. above floor) units are to be mounted at (20 ft.) above floor.

Mounting height (20 ft.) minus work height (5 ft.) equals differential (15 ft.) or, 15° rise in air temperature at unit

air inlet. Correct for actual inlet air temperature of 75° (60° + 15° = 75° E.A.T.) on Ta b l e 10

Table 11. STEAM CORRECTION FACTORS BASED ON 2 LBS. STEAM 60° E.A.T.

ENTERING

AIR TEMP

STEAM PRESSURE - LBS. PER SQ. IN. (SATURATED)

02510152030405075

30° 1.18 1.22 1.27 1.34 1.40 1.45 1.53 1.61 1.67 1.79

40° 1.11 1.15 1.20 1.27 1.32 1.37 1.46 1.53 1.59 1.71

50° 1.03 1.07 1.12 1.19 1.25 1.30 1.39 1.46 1.52 1.64

60° 0.96 1.00 1.05 1.12 1.18 1.23 1.32 1.39 1.45 1.57

70° 0.90 0.93 0.98 1.05 1.11 1.16 1.25 1.32 1.38 1.49

80° 0.83 0.86 0.91 0.98 1.04 1.09 1.18 1.25 1.31 1.42

90° 0.76 0.80 0.85 0.91 0.97 1.02 1.11 1.18 1.24 1.36

100° 0.69 0.73 0.78 0.85 0.90 0.96 1.04 1.11 1.17 1.29

Table 12. PROPERTIES OF SATURATED STEAM

STEAM PRESSURE IN LBS. PER SQUARE INCH GAUGE

02 5 10 15 20 30 40 50 75

Steam Temperature-°F 212.0 218.5 227.1 239.4 249.8 258.8 274.0 286.7 297.7 319.9

Latent Heat of Steam 970 966 961 953 946 940 929 920 912 891

UH-PRC001-EN 21

Performance Data

Hot Water Performance Data

Horizontal Unit Heaters

Peformance based on 200° EWT, 60° E.A.T., 20° WTD (max working pressure 150 PSI, 366° F)

* For the lower output, an optional Speed Controller must be ordered.

Table 13.

Model No. Total MBh GPM LAT °F WPD Motor HP RPM

Nominal

CFM

Outlet

Velocity

FPM Sound Rating

S-A08

8.0

0.80

.80 16 Watts

1550 245 250 II

6.8 90 1350 210 215 I

S-A18

18.4

1.9

2.2 16 Watts

1550 500 500 II

15.7 96 1350 420 420 I

S-A25

24.8

2.5

102

2.2 25 Watts

1550 580 590 II

21.2 106 1350 460 450 I

S-A36

35.9

3.6

3.0 1/20

1000 850 550 II

32.3 100 900 750 480 I

S-18

13.1

1.3

.005 16 Watts

1550 395 395 II

11.7 99 1350 350 350 I

S-24

17.4

1.8

.014 16 Watts

1550 450 450 II

15.6 98 1350 380 380 I

S-36

26.1

2.7

103

.09 25 Watts

1550 550 550 II

23.5 103 1350 480 480 I

S-48

34.8

3.5

103

.12 1/20

1000 750 550 II

31.3 111 900 630 460 I

S-60

43.6

4.4

105

.17 1/20

1000 900 650 II

39.2 112 900 700 510 I

S-72

52.3

5.3

104

.23 1/20

1000 1100 800 II

47.0 106 900 950 700 I

S-84

61.0

6.1

100

.24 1/12

1000 1400 900 III

54.9 106 900 1100 750 II

S-96

69.7

7.0

106

.29 1/12

1000 1400 930 III

62.7 113 900 1100 800 II

S-108

78.4

7.9

100

.36 1/12

1000 1800 1000 III

70.5 103 900 1500 900 II

S-120 87.1 8.8 102 .39 1/3 1140 1900 900 III

S-132 95.8 9.6 104 .41 1/3 1140 2000 950 IV

S-144 104.0 10.4 104 .43 1/3 1140 2200 1000 IV

S-156 113.0 11.3 100 .53 1/3 1140 2600 1150 IV

S-180 118.0 11.8 110 .60 1/3 1140 2200 800 III

S-204 148.1 14.9 107 .79 1/3 1140 2900 1000 IV

S-240 174.0 17.4 106 1.06 1/3 1140 3500 900 IV

S-280 209.1 21.0 106 1.33 1/2 1100 4200 980 IV

S-300 230.0 23.0 102 2.1 1/2 1100 5000 700 IV

S-360 261.3 26.2 103 2.1 1/2 1100 5500 1000 IV

22 UH-PRC001-EN

Performance Data

Vertical Unit Heaters

Table 14. Standard Output Units**

Model No.

Water

Temp.

Drop

Total

MBh GPM WPD LAT °F Motor HP RPM

Nominal

CFM

Outlet

Velocity

FPM Sound Rating

P-42

10° 28.8 5.93 .37 104.6°

1/40 1550 595 877 I

20° 22.7 2.34 .06 95.2°

30° 16.7 1.15 .02 85.9°

P-42*

10° 22.9 4.71 .24 108.3°

1/40 1150 436 658 I

20° 18.1 1.87 .04 98.3°

30° 13.4 .92 .01 88.4°

P-64

10° 48.1 9.92 1.05 104.8°

1/20 1550 989 1005 II

20° 39.6 4.08 .19 96.9°

30° 31.1 2.14 .06 89.0°

P-64*

10° 38.1 7.85 .67 109.7°

1/20 1150 706 727 II

20° 31.5 3.24 .13 101.1°

30° 24.8 1.71 .04 92.4°

P-80

10° 58.7 12.11 .98 105.1°

1/20 1550 1200 1220 II

20° 48.4 4.99 .18 97.2°

30° 38.1 2.62 .05 89.3°

P-80*

10° 46.5 9.59 .63 110.0°

1/20 1150 858 894 II

20° 38.5 3.97 .12 101.2°

30° 30.5 2.09 .03 92.7°

P-102

10° 77.2 15.91 2.06 106.6°

1/8 1070 1528 980 II

20° 68.3 7.03 .44 101.2°

30° 59.3 4.08 .16 95.8°

P-102*

10° 63.7 13.13 1.43 108.6°

1/8 850 1208 783 II

20° 56.5 5.82 .31 103.1°

30° 49.2 3.38 .11 97.6°

P-122

10° 94.9 19.55 3.04 108.9°

1/6 1100 1790 1170 III

20° 83.7 8.63 .65 103.1°

30° 72.5 4.98 .23 97.3°

P-146

10° 117.6 24.24 4.32 108.8°

1/6 1100 2220 1045 III

20° 105.2 10.84 .96 103.7°

30° 92.8 6.38 .36 98.5°

P-166

10° 132.4 27.29 3.67 106.6°

1/6 1100 2620 1230 IV

20° 118.6 12.22 .81 101.7°

30° 104.8 7.20 .30 96.9°

P-202

10° 156.2 32.20 5.02 105.0°

1/4 1100 3200 1495 III

20° 139.7 14.40 1.11 100.2°

30° 123.2 8.47 .41 95.5°

P-252

15° 188.9 25.95 3.92 101.8°

1/4 1100 4162 1205 IV

20° 180.1 18.56 2.10 99.9°

30° 162.7 11.18 .82 96.0°

P-280

15° 215.4 29.60 5.02 104.8°

1/2 1100 4430 1275 IV

20° 205.4 21.17 2.68 102.7°

30° 185.3 12.73 1.04 98.5°

UH-PRC001-EN 23

Performance Data

**Performance based on 200° EWT, 20° T.D., 60° E.A.T. Performance at 10° & 30° T.D. is also shown.

For capacities at other conditions, use the correction multipliers in Table 16, Table 17, Table 18, Table 19, and Table 20

*Speed controller option is required for reduced ratings.

P-336

15° 254.9 35.03 6.88 105.1°

3/4 1140 5210 1500 IV

20° 242.9 25.03 3.67 103.0°

30° 218.9 15.04 1.42 98.7°

P-384

15° 294.7 40.49 6.60 104.2°

3/4 1140 6140 1770 IV

20° 280.8 28.94 3.52 102.2°

30° 253.1 17.39 1.36 98.0°

P-500

15° ----- ----- ----- -----

1-1/2 1160 8020 1640 IV

20° 368.1 37.93 5.81 102.3°

30° 333.6 22.92 2.29 98.3°

P-600

15° 451.2 62.00 8.78 104.0°

1-1/2 1160 9450 1930 IV

20° 431.1 44.43 4.72 102.0°

30° 391.0 26.86 1.86 98.1°

P-720

15° ----- ----- ----- -----

3 1165 11,000 2250 IV

20° 519.4 53.52 5.29 103.5°

30° 470.9 32.35 2.08 99.5°

Table 15. Low Output Units Standard Model P Units with All Air Ports Open**

Model No.

Water

Temp.

Drop Total MBh GPM WPD LAT °F Motor HP RPM

Nominal

CFM

Outlet

Velocity

FPM Sound Rating

P-42L

10° 23.9 4.92 .26 92.9°

1/40 1550 668 950 I

20° 18.9 1.95 .04 86.1°

30° 14.0 .96 .01 79.3°

P-42L*

10° 16.7 3.45 .13 92.8°

1/40 1150 470 672 I

20° 13.5 1.39 .02 86.4°

30° ----- ----- ----- -----

P-64L

10° 41.5 8.56 .80 91.9°

1/20 1550 1200 1190 II

20° 34.2 3.53 .15 86.3°

30° 27.0 1.85 .04 80.7°

P-64L*

10° 32.4 6.68 .50 94.7°

1/20 1150 862 858 II

20° 26.9 2.77 .09 88.7°

30° 21.3 1.46 .03 82.8°

P-80L

10° 48.9 10.09 .69 93.2°

1/20 1550 1360 1350 II

20° 40.5 4.17 .13 87.4°

30° 32.0 2.20 .04 81.7°

P-80L*

10° 38.5 7.94 .44 95.7°

1/20 1150 995 992 II

20° 32.0 3.29 .08 89.6°

30° 25.4 1.75 .02 83.5°

P-102L

10° 63.7 13.13 1.43 93.5°

1/8 1070 1752 1050 II

20° 56.5 5.82 .31 89.7°

30° 49.2 3.38 .11 85.9°

P-102L*

10° 54.5 11.24 1.06 93.5°

1/8 850 1499 827 II

20° 48.5 4.99 .23 89.8°

30° 42.4 2.91 .08 86.1°

Table 14. Standard Output Units** (continued)

Model No.

Water

Temp.

Drop

Total

MBh GPM WPD LAT °F Motor HP RPM

Nominal

CFM

Outlet

Velocity

FPM Sound Rating

24 UH-PRC001-EN

Performance Data

**Performance based on 200° EWT, 20° T.D., 60° E.A.T. Performance at 10° & 30° T.D. is also shown.

For capacities at other conditions, use the correction multipliers in Table 16, Table 17, Table 18, Table 19, and Table 20.

P-122

10° 83.7 17.24 2.40 95.4°

1/6 1100 2180 1390 III

20° 73.9 7.62 .51 91.3

30° 64.2 4.41 .18 87.1°

P-146L

10° 95.4 19.66 2.92 97.3°

1/6 1100 2360 1080 III

20° 85.5 8.81 .65 93.4°

30° 75.6 5.20 .24 89.5°

P-166L

10° 112.3 23.15 2.70 95.4°

1/6 1100 2920 1340 IV

20° 100.7 10.38 .60 91.8°

30° 89.2 6.13 .22 88.1°

P-202L

10° 135.8 27.98 3.85 96.9°

1/4 1100 3390 1560 III

20° 121.8 12.52 .85 93.0°

30° 107.3 7.37 .32 89.2°

P-252L

10° 168.5 34.72 6.75 94.5°

1/4 1100 4507 1270 IV

20° 153.8 15.85 1.56 91.4°

30° 139.1 9.56 .61 88.4°

P-280L

10° 188.9 25.95 3.92 94.5°

1/2 1100 5040 1420 IV

20° 180.1 18.56 2.10 92.9°

30° 162.7 11.18 .82 89.7°

P-336L

10° 220.9 30.35 5.26 95.7°

3/4 1140 5700 1610 IV

20° 210.6 21.70 2.81 94.1°

30° 189.9 13.05 1.09 90.7°

P-384L

10° 260.7 35.82 5.24 96.4°

3/4 1140 6600 1870 IV

20° 248.5 25.61 2.80 94.7°

30° 224.2 15.40 1.09 91.3°

P-500L

10° ----- ----- ----- -----

1-1/2 1160 9380 1860 IV

20° 310.5 32.00 4.23 90.5°

30° 281.7 19.35 1.67 87.7°

P-600L

10° 394.4 54.19 6.83 95.3°

1-1/2 1160 10,300 2060 IV

20° 377.0 38.85 3.68 93.7°

30° 342.2 23.51 1.45 90.6°

P-720L

10° ----- ----- ----- -----

3 1165 11,900 2380 IV

20° 453.7 46.76 4.11 95.1°

30° 411.7 28.28 1.62 91.9°

Table 15. Low Output Units Standard Model P Units with All Air Ports Open** (continued)

Model No.

Water

Temp.

Drop Total MBh GPM WPD LAT °F Motor HP RPM

Nominal

CFM

Outlet

Velocity

FPM Sound Rating

UH-PRC001-EN 25

Performance Data

To obtain the BTU capacity for conditions other than those in the basic capacity tables, multiply the basic rating (200° entering water, 60° entering air) by the proper constant

from Table 17.

Table 16. HOT WATER CALCULATIONS AND CORRECTION FACTORS

EXAMPLE:

UNIT:__________________P-42

Entering Water Temp. _____160°F

Entering Air Temp. ________ 40°F

Water Temperature Drop ____ 10°F

I. CAPACITY @ 20° TD:

A. For 200° EWT, 60° EAT

Read output directly from Ta b l e 1 4 & Tab l e 15 ,

22,700 BTU/HR (Ref., Std. P-42, p. 22).

B. For EWT and/or EAT above or below

Standard

Multiply output from Ta b le 1 4 & Ta b le 1 5 by factor from

Ta b l e 1 7 .

22,700 x .878 = 19,931 BTU/HR.

II. CAPACITY AT OTHER TD's

A. For TD's from 5 to 60°F

Multiply output obtained in IA. or IB.

(above) by appropriate factor from Ta b le 1 8

IA - 22,700 x 1.15 = 26,105 BTU/HR.

-OR-

IB - 19,931 x 1.15 = 22,921 BTU/HR.

III. GPM AT OTHER TD's

A. For TD's from 5 to 60°F

Multiply GPM of unit for 20° TD, from Ta ble 1 4 by

appropriate factor from Ta b le 1 8

2.34 x 2.30 = 5.38 GPM (Applies only

to units with. Std. 200° EWT, 60° EAT.)

For all others calculate using formula -

GPM = BTU/500 x TD

IV. PRESSURE LOSS AT OTHER TD's

A.ForTD's from 5 to 60°F

Multiply P.D. of unit for 20° TD, from Ta b l e 1 4 & Ta b l e 1 5

by appropriate factor from Tabl e 18

.06 x 5.00 = .30 Ft. H2O

Table 17. HOT WATER CONVERSION FACTORS BASED ON 200° ENTERING WATER 60° ENTERING AIR 20° TEMPERATURE DROP

ENTERING AIR

TEMPERATURE

ENTERING WATER TEMPERATURE -20° WATER TEMPERATURE DROP

100° 120° 140° 160° 180° 200° 220° 240° 260° 280° 300°

30° 0.518 0.666 0.814 0.963 1.120 1.268 1.408 1.555 1.702 1.850 1.997

40° 0.439 0.585 0.731 0.878 1.025 1.172 1.317 1.464 1.609 1.755 1.908

50° 0.361 0.506 0.651 0.796 0.941 1.085 1.231 1.375 1.518 1.663 1.824

60° 0.286 0.429 0.571 0.715 0.857 1.000 1.143 1.286 1.429 1.571 1.717

70° 0.212 0.353 0.494 0.636 0.777 0.918 1.060 1.201 1.342 1.483 1.630

80° 0.140 0.279 0.419 0.558 0.698 0.837 0.977 1.117 1.257 1.397 1.545

90° 0.069 0.207 0.345 0.483 0.621 0.759 0.897 1.035 1.173 1.311 1.462

100° 0 0.137 0.273 0.409 0.546 0.682 0.818 0.955 1.094 1.230 1.371

Table 18. HOT WATER BTU, GPM AND PRESSURE LOSS FACTORS BASED ON STANDARD CONDITIONS OF 200°F ENTERING

WATER 60°F ENTERING AIR & 20°F WATER DROP

USE FACTORS FROM THIS TABLE TO OBTAIN

APPROXIMATE RESULTS

TEMPERATURE DROP °F

510152025 30 4050 60

To obtain BTU for other Water Temperature Drops,

multiply basic BTU rating by applicable Factor.

1.25 1.15 1.08 1.00 .94 .90 .83 .76 .72

To obtain GPM for other Water Temperature Drops,

multiply basic GPM rating by applicable Factor.*

5.00 2.30 1.44 1.00 .74 .59 .40 .30 .24

To obtain Pressure Loss Feet of Water for other

temperature Drops, multiply Basic loss at 20° drop by

Factor.

10.00 5.00 2.00 1.00 .60 .40 .20 .13 .07

Table 19. *MINIMUM WATER FLOW - GPM

MODEL No. 42 64 80 102 146 166 202 252 336 384 500 600 700

MIN. GPM .55 .55 .55 .55 .82 .82 1.10 1.10 1.10 1.10 1.0 1.4 1.6

Table 20. *HEATING CAPACITY FACTORS FOR VARIOUS RATES OF WATER FLOW

% of Rated Water Flow 25% 50% 75% 100% 125% 150% 175%

Btu/Hr Heating Capacity .80 .89 .96 1.00 1.04 1.07 1.10

26 UH-PRC001-EN

Performance Data

Technical & Mounting

Data

Horizontal Unit Heaters

Te c h n i c a l D a t a

The performance data listed in

Ta b l e 1 3 , Tab l e 14 , and Ta b l e 1 5

include sound ratings. The ratings

provide a guide in determining the

acceptable degree of loudness in

particular occupancy situations.

Certain general rules apply to specific

selection of unit heaters with regard

to degree of quietness (or loudness);

• The greater the fan diameter, the

higher the sound level.

• The higher the motor RPM, the

higher the sound level. Note that

on most units the lower the

speed mode results in lowering

the sound rating one increment.

• Selecting a larger number of

smaller units generally results in

lower overall noise levels than

fewer large units.

All horizontal steam and hot water

unit heater motors, whether fan

guard or shelf-mounted, are isolated

from the mechanical mount by

resilient isolators. This mounting

along with balanced fan blades and

excellent overall construction

integrity, assures you the utmost in

quiet operation.

The following table outlines sound

ratings for various applications. The

lower the number, the quieter the

unit and the lower the sound

requirement.

Mounting Heights and Throws

The following table is based on 60°

entering air and either 2 lb. steam or

200° water with a 20° T.D. The data is

based on the higher speed CFM

throughout and velocity. Care should

be exercised in locating adjacent unit

heaters and allowance should be

made for obstructions in the air

pattern and conflicting air currents

from other air moving devices.

*Depending on specific use in these facilities, size of operation, etc.

*Compared to water.

CATEGORY OF AREA SOUND RATING

apartment, assembly hall, classrooms, churches, courtrooms, executive

offices, hospitals, libraries, museums, theatres

dining rooms, general offices, recreation areas, small retail stores II

restaurants, banks, cafeterias, department stores, public buildings,

service stations

III

gymnasiums, health clubs, laundromats, supermarkets IV

garages, small machine shops, light manufacturing V

Factories, foundries, steel mills III-VII*

Table 21. Corrections When Using Glycol Solution in System

Propylene

Glycol

Heat transfer @ 180°F with no

increase inflow rate

20% solution .97*

50% solution .90*

G.P.M. Req'd. @ 180°F, 20°F ∆ t (no

correction to pump curve)

1.10%*

Pump Head Req'd. @ 180°F w/

increase in G.P.M.

1.23%*

Specify gravity (water = 1.0) 1.045-1.055*

Pounds/Gallons @ 60°F (water =

8.3453 Pound/Gallon)

8.77

pH @ 50% by volume 9.5

Freezing Point by volume

55% -

50% -28°F

40% 13°F

30% + 4°F

20% +17°F

Table 22. Approximate factors at varying altitudes

Altitude Factor

Sea level - 1000 ft. 1.00

1000 ft. - 3000 ft. .958

3000 ft. - 5000 ft. .929

5000 ft. - 7000 ft. .900

7000 ft. - 10000 ft. .871

UH-PRC001-EN 27

Performance Data

Motor Characteristics Data

Horizontal Unit Heaters

*Optional variable speed switch is available.

**These motors are without thermal overload protection.

†230/1/60 unit has 115/1/60 motor supplied with field installed stepdown transformer.

Note 1:

All motors are constant speed and operate at top speed as indicated in motor data. Models 18 through 108, including A08, A18, A25 and A36 can be run

at reduced speed with addition of optional variable speed switch. This switch is factory-calibrated for low and high speed ratings, with intermediate speeds

infinitely controllable. Models 120 through 360 operate at constant speed as indicated in motor data. All 1/4 H.P. motors are P.S.C.

Note 2:

Motors under 1/3 H.P. are totally enclosed, frame mounted, 115/1/60 with thermal overload protection and permanently lubricated sleeve bearings with

optional speed controller available. 1/3 H.P. (115/1/60) motors are open frame constant speed with thermal over-load protection and ball bearings. 1/3

H.P. (230V) and 1/2 H.P. (230V) motors are open frame constant speed with thermal overload protection and ball bearings.

Note 3:

1/3 and 1/2 H.P. motors are available as 230V single and 3 phase in open frame and explosion-proof housings, all available as options. 1/3 and 1/2 H.P.

motors operate at single speed only.

Note 4:

Stated AMP draw is Full Load Amp (FLA). AMP draw varies by motor manufacturer ± .2 AMPS. Verify FLA per unit motor data plate.

Table 23. Totally Enclosed Motor Type

S Unit Model No. AMP MCA MOP HP RPM

115/1/60

18, 24, A08, A18 0.8 1 1.8 16W* 1550

A36 1.4 1.8 3.2 1/20* 1000

36, A25 1.2 1.5 2.7 25W* 1550

48, 60, 72 1.4 1.8 3.2 1/20* 1000

84, 96, 108 2.2 2.8 5.0 1/12* 1000

120, 132, 144, 156,

180, 204, 240

4.5 5.6 10.1 1/3 1140

280, 300, 360 5.4 6.8 12.2 1/2 1100

230/1/60

18, 24, A08, A18 0.4 0.5 0.9 16W 1550

A36 1.4 1.8 3.2 1/20† 1000

36, A25 0.6 0.8 1.4 25W 1550

48, 60, 72 1.4 1.8 3.2 1/20† 1000

84, 96, 108 2.2 2.8 5.0 1/12† 1000

120, 132, 144, 156,

180, 204, 240

4.5 5.6 10.1 1/3† 1140

280, 300, 360 5.4 6.8 12.2 1/2† 1100

208-230/460/3/60

48, 60, 72, 84, 96,

108, 120, 132, 144,

156, 180, 204, 240,

280, 300, 360

2.6-2.6/1.3 3.3-3.3/1.6 5.9-5.9/2.9 1/2** 1140

28 UH-PRC001-EN

Performance Data

*Optional variable speed switch is available.

**These motors are without thermal overload protection.

***These motors are 115/230 volts.

†230/1/60 unit has 115/1/60 motor supplied with field installed stepdown transformer.

Note 1:

Models 120 through 360 operate at constant speed as indicated in motor data. All 1/4 H.P. motors are P.S.C.

Note 2:

Motors under 1/3 H.P. are totally enclosed, frame mounted, 115/1/60 with thermal overload protection and permanently lubricated sleeve bearings with

optional speed controller available. 1/3 H.P. (115/1/60) motors are open frame constant speed with thermal over-load protection and ball bearings. 1/3

H.P. (230V) and 1/2 H.P. (230V) motors are open frame constant speed with thermal overload protection and ball bearings.

Note 3:

1/3 and 1/2 H.P. motors are available as 230V single and 3 phase in open frame and explosion-proof housings, all available as options. 1/3 and 1/2 H.P.

motors operate at single speed only.

Note 4:

Stated AMP draw is Full Load Amp (FLA). AMP draw varies by motor manufacturer ± .2 AMPS. Verify FLA per unit motor data plate.

Table 24. Explosion Proof with Thermal Overload Motor Type

S Unit Model No. AMP MCA MOP HP RPM

115/1/60

48, 60, 72, 84, 96,

108, 120, 132

3.7 4.6 8.3 1/6 1140

144, 156, 180, 204 5.4 6.8 12.2 1/4 1140

240, 280, 300 7.4 9.3 16.7 1/3*** 1140

360 7.4 9.3 16.7 1/2*** 1140

230/1/60

48, 60, 72, 84, 96,

108, 120, 132

3.7 4.6 8.3 1/6† 1140

144, 156, 180, 204 5.4 6.8 12.2 1/4† 1140

240, 280, 300 3.7 4.7 8.3 1/3*** 1140

360 3.7 4.7 8.3 1/2*** 1140

230/460/3/60/TE

144, 156, 180, 204,

240, 280, 300, 360

2.2/1.1 2.8/1.4 5.0/2.5 1/3 1140

UH-PRC001-EN 29

Performance Data

Vertical Unit Heaters

* Optional variable speed switch is available.

** These motors have automatic thermal overload protection or impedance protection.

Note 1:

All motors are constant speed and operate at top speed as indicated in motor data. Models through 1/8 H.P. can be run at reduced speed with addition of

optional variable speed switch. This switch is factory-calibrated for low and high speed ratings, with intermediate speeds infinitely controllable. Models 166

through 720 operate at constant speed as indicated in motor data.

Note 2:

Stated draw is Full Load (FLA). AMP draw varies by motor manufacturer ± .2 AMPS.

Table 25. Totally Enclosed Motor Type

P Unit Model No. AMP MCA MOP HP RPM

115/1/60

42 1.23** 1.6 2.8 1/40* 1550

64, 80 2.1** 2.6 4.7 1/20* 1550

102 1.2** 1.5 2.7 1/8* 1070

122

2.3** 2.9 5.2 1/6 1100

146

166

202 3.6** 4.5 8.1 1/4 1100

252 3.6** 4.5 8.1 1/4 1100

280 5.4** 6.8 12.2 1/2 1100

208-230/460/3/60

42 0.98-1.1/0.55 1.2-1.4/0.7 2.2-2.5/1.2 1/6 1140

64, 80 0.98-1.1/0.55 1.2-1.4/0.7 2.2-2.5/1.2 1/6 1140

102 0.98-1.1/0.55 1.2-1.4/0.7 2.2-2.5/1.2 1/6 1140

122

0.98-1.1/0.55 1.2-1.4/0.7 2.2-2.5/1.2 1/6 1140

146

166

202 1.2-1.4/0.7 1.5-1.8/0.9 2.7-3.2/1.6 1/4 1140

252 1.2-1.4/0.7 1.5-1.8/0.9 2.7-3.2/1.6 1/4 1140

280 1.8-2.0/1.0 2.3-2.5/1.3 4.1-4.5/2.3 1/2 1140

336, 384 3.1-3.2/1.6 3.9-4.0/2.0 7.0-7.2/3.6 3/4 1140

500, 600 5.3-5.0/2.5 6.6-6.3/3.1 11.9-11.3/5.6 1-1/2 1160

720 9.9-9.8/4.9 12.4-12.3/6.1 22.3-22.1/11.0 3 1165

575/3/60

42, 64, 80, 102, 122,

146, 166, 202, 252

0.6 0.8 1.4 1/3 1140

280 0.8 1.0 1.8 1/2 1140

336, 384 1.3 1.6 2.9 3/4 1140

500, 600 2.0 2.5 4.5 1-1/2 1160

720 3.8 4.7 8.6 3 1165

30 UH-PRC001-EN

Performance Data

*** These motors are 230/460 volts only.

Note 1:

Models 166 through 720 operate at constant speed as indicated in motor data.

Note 2:

Stated draw is Full Load (FLA). AMP draw varies by motor manufacturer ± .2 AMPS.

Table 26. Explosion Proof with Thermal Overload Motor Type

P Unit Model No. AMP MCA MOP HP RPM

115/1/60

42 3.8 4.8 8.6 1/6 1140

64, 80 3.8 4.8 8.6 1/6 1140

102 3.8 4.8 8.6 1/6 1140

122

3.8 4.8 8.6 1/6 1140

146

166

202 4.4 5.5 9.9 1/4 1140

252 4.4 5.5 9.9 1/4 1140

280 7.8 9.8 17.6 1/2 1140

208-230/460/3/60

42 1.0-1.0/0.5 1.3-1.3/0.6 2.3-2.3/1.1 1/6 1140

64, 80 1.0-1.0/0.5 1.3-1.3/0.6 2.3-2.3/1.1 1/6 1140

102 1.0-1.0/0.5 1.3-1.3/0.6 2.3-2.3/1.1 1/6 1140

122

1.0-1.0/0.5 1.3-1.3/0.6 2.3-2.3/1.1 1/6 1140

146

166

202 1.1-1.1/0.55 1.4-1.4/0.7 2.5-2.5/1.2 1/4 1140

252 1.1-1.1/0.55 1.4-1.4/0.7 2.5-2.5/1.2 1/4 1140

280 1.9/0.95*** 2.4/1.2 4.3/2.1 1/2 1140

336, 384 3.1-3.2/1.6 3.9-4.0/2.0 7.0-7.2/3.6 3/4 1145

500, 600 5.0/2.5 6.5/3.3 11.3/5.6 1-1/2 1150

700 10.0/5.0*** 12.5/6.3 22.5/11.3 3 1150

UH-PRC001-EN 31

Wiring Diagrams

WARNING

Hazardous Voltage

Disconnect all electric power,

including remote disconnects before

servicing. Follow proper lockout/

tagout procedures to ensure the

power can not be inadvertently

energized. Failure to disconnect

power before servicing could result

in death or serious injury.

WARNING

Hazardous Voltage

Do not use any tools (i.e.

screwdriver, pliers, etc.) across the

terminals to check for power. Use a

voltmeter. Failure to disconnect

power before servicing could result

in death or serious injury.

1. For internal wiring and overload

protection on all starters, consult

the control manufacturer for

details.

2. When using thermostatic control

with a manual starter, be sure

that the electrical rating of the

thermostat is sufficient to carry

the motor current.

Note: Refer to the Motor

Characteristics-portion of the

Performance Data chapter for

motor characteristics of

Individual Unit Heaters

Figure 8.

MOTOR

MANUAL STARTING

SWITCH

1 PHASE LINE

MANUAL CONTROL WITH

SINGLE PHASE MOTOR

Figure 9.

Figure 10.

Figure 11.

1 PHASE LINE

MOTOR

MANUAL STARTING

SWITCH

ROOM THERMOSTAT

THERMOSTATIC CONTROL

WITH MANUAL STARTER

1 PHASE LINE

MOTOR

MAGNETIC

STARTING SWITCH

THERMOSTAT

MOTOR

THERMOSTATIC CONTROL

USING MAGNETIC STARTER

OPERATING SEVERAL UNITS

1 PHASE LINE

MOTOR

MANUAL STARTING

SWITCH

THERMOSTAT

SPEED CONTROLLER

SPEED CONTROLLER WITH

MANUAL STARTING SWITCH

Figure 12.

Figure 13.

Figure 14.

1 PHASE LINE

MAGNETIC

STARTING SWITCH

THERMOSTAT

MOTORS

SPEED

CONTROLLERS

SPEED CONTROLLERS WITH

MAGNETIC STARTING SWITCH

FOR OPERATING SEVERAL UNITS

MOTOR

MANUAL STARTING

SWITCH

3 PHASE LINE

MANUAL CONTROL WITH

THREE PHASE MOTOR

3 PHASE LINE

MAGNETIC

STARTING SWITCH

THERMOSTAT

THERMOSTATIC CONTROL

OF SEVERAL THREE PHASE UNITS

MOTORS

Wiring Diagrams

32 UH-PRC001-EN

Dimensional Data: P Model

Figure 15. Models 42-80

Table 27. Roughing in Dimensional Data - Model Size 42-80

Unit Capacity (MBH) Fan Dia. A B C D E F G H K L (Min.) P (NPT) R S T U V

042 11 1/4 18 1/4 4 5/8 1 1/4 11 3/4 3/4 4 11 1 3/8 1 7/8 7 1 1/2 3 5/8 6 5/8 2 3/4 11 3 5/8

064 13 1/2 21 1/4 4 5/8 1 5/8 14 1 4 14 1 3/8 1 7/8 7 1 1/2 3 5/8 7 1/8 2 3/4 14 3 5/8

080 13 1/2 21 1/4 6 1/8 1 5/8 14 1 3 14 1 3/8 1 7/8 7 1 1/2 3 5/8 8 5/8 2 3/4 14 3 5/8

CEILING

STEAM

SUPPLY

HOT WATER

RETURN

STEAM

RETURN

HOT WATER

SUPPLY

G A

(4) MOUNTING HOLES

THREAD TAPS 3/8 - 16 FOR 42P-80P

Dimensional Data

UH-PRC001-EN 33

Dimensional Data

Figure 16. Models 102-720

Table 28. Roughing in Dimensional Data - Model Size 102-720

Unit

Capacity

(MBH)

Fan

Dia. A B C D E F G H K

(Min.)

(NPT) R S T U V

102 16 3/4 25 1/4 6 1/8 2 17 1/2 1 1/8 3 17 1 3/8 2 3/4 7 1 1/2 4 1/8 9 1/8 2 3/4 17 4 1/8

122 16 3/4 25 1/4 6 1/8 2 17 1/2 1 3/4 3 17 1 3/8 2 3/4 7 1 1/2 4 1/8 9 3/4 2 3/4 17 4 1/8

146 19 3/4 29 1/2 6 1/8 2 3/8 20 5/8 1 1/4 4 20 1/2 1 3/4 3 1/2 7 2 4 1/2 9 5/8 2 3/4 20 1/2 4 1/2

166 19 3/4 29 1/2 6 1/8 2 3/8 20 5/8 1 3/4 4 20 1/2 1 3/4 3 1/2 7 2 4 1/2 10 1/8 2 3/4 20 1/2 4 1/2

202 19 3/4 29 1/2 7 5/8 2 3/8 20 5/8 2 4 20 1/2 1 3/4 3 1/2 7 2 4 1/2 12 2 3/4 20 1/2 4 1/2

252 25 1/4 37 1/2 7 5/8 3 26 3/8 1 3 1/2 28 1 3/4 3 1/2 7 2 4 3/4 11 5/8 2 3/4 18 9 3/4

280 25 1/4 37 1/2 7 5/8 3 26 3/8 1 1/4 3 1/2 28 1 3/4 3 1/2 7 2 4 3/4 11 3/4 2 3/4 18 9 3/4

336 25 1/4 37 1/2 7 5/8 3 26 3/8 2 1/8 4 28 1 3/4 3 1/2 7 2 4 3/4 12 3/4 2 3/4 18 9 3/4

384 25 1/4 37 1/2 9 1/8 3 26 3/8 2 3 1/2 28 1 3/4 3 1/2 7 2 4 3/4 14 1/8 2 3/4 18 9 3/4

500 30 42 9 1/8 3 1/2 31 1/4 1 5/8 3 30 2 1/4 4 1/4 7 2 1/2 6 14 1/4 3 30 6

600 30 42 12 1/8 3 1/2 31 1/4 2 1/8 3 30 2 1/4 4 1/4 7 2 1/2 6 17 3/4 3 30 6

720 30 42 13 5/8 3 1/2 31 1/4 3 4 30 2 1/4 4 1/4 7 2 1/2 6 20 1/4 3 30 6

CEILING

STEAM

SUPPLY

HOT WATER

RETURN

STEAM

RETURN

HOT WATER

SUPPLY

(4) MOUNTING HOLES 3/8 - 16 FOR 102P-384P

THREAD TAPS 1/2 - 13 FOR 500P-720P

34 UH-PRC001-EN

Dimensional Data

Dimensional Data: S Model

Note: Motors are totally enclosed,

thermally protected, sleeve

bearing, with 4" (w) x 2" (h)

conduit connection boxes.

Nutserts are attached to

enclosure for balanced

hanging.

Table 29. Louver Cone Diffuser Roughing in Dimensions

Unit Size A B C D No. of Louvers

64 & 80

16 1/2

14 1/4

6 1/2

2 5/8

3 1/8

102 & 122

146, 166 & 202

24 1/4

28 3/8

24 3/4

9 3/4

11 1/2

3 15/16

4 5/8

252, 280, 336, & 384

500, 600 & 720

35 1/2

41 1/2

31 1/2

37 1/4

13 3/4

4 3/4

Figure 17. Serpentine Type Models A08, A18, A25, A36

Table 30. Serpentine Models

MODEL H W A B C

NO. OF

LOUVERS

NOM. FAN

DIAM.

APPROX.

SHIP WT.

A08 16 18 16 7/32 11 1/4 4 1/4 5 9 22

A18 16 18 16 7/32 11 1/4 4 1/4 5 10 24

A25 16 18 16 7/32 11 1/4 4 1/4 5 10 25

A36 18 1/2 20 1/2 18 23/32 13 3/4 5 1/8 6 12 31

UH-PRC001-EN 35

Dimensional Data

* Applies to standard motor with standard fan guard. When optional motors or OSHA fan guards are requested, dimensions will change according to the

substitutions made.

NOTES

1. Standard motor and standard guard shown.

2. Optional OSHA guards available for all units with 1 phase motors.

3. All 3 phase and explosion proof motors are shelf mounted.

Figure 18. Header Type Models 18 thru 360

Table 31. Models S-18 Thru 360 (Header Type)

MODEL A B C D E F G* H* J K L M N

NO.

LOU-

VERS

NOM.

FAN

DIAM.

APPROX.

SHIP

WT.

S-18 14 5/8 7 5/16 15 7 1/2 6 1/8 2 15/16 3 1/4 9 3/8 12 1/4 9 1/2 1 1/4 2 1/4 12 7/8 4 9 26

S-24

S-36

14 5/8 7 5/16 18 9 6 1/8 2 15/16 3 1/4 9 3/8 12 1/4 12 1/2 1 1/4 2 1/4 12 7/8 5 10 30

S-48

S-60

17 1/8 8 9/16 20 1/2 10 1/4 5 7/8 2 15/16 5 1/16 10 15/16 14 3/4 15 1 1/4 1 3/4 15 3/8 6 12 41

S-72 18 3/8 9 3/16 21 3/4 10 7/8 6 2 15/16 5 1/16 11 1/16 16 16 1/4 1 1/4 1 3/4 16 5/8 7 14 44

S-84 20 7/8 10 9/16 24 1/4 12 1/8 6 1/8 2 15/16 5 11/16 11 13/16 18 1/2 18 3/4 1 1/4 1 3/4 19 1/8 8 14 47

S-96

S-108

19 5/8 9 13/16 24 12 6 5/16 3 3/16 7 1/2 13 13/16 17 1/4 17 1/2 1 1/2 1 3/4 17 7/8 8 16 49

S-120 20 7/8 10 7/16 25 1/4 12 5/8 6 5/16 3 3/16 6 11/16 13 18 1/2 18 3/4 1 1/2 1 3/4 19 1/8 8 18 59

S-132

S-144

23 3/8 11 11/16 27 3/4 13 7/8 6 5/16 3 3/16 7 5/8 14 21 21 1/4 1 1/2 1 3/4 21 5/8 9 18 74

S-156 23 3/8 11 11/16 27 3/4 13 7/8 6 5/16 3 3/16 7 7/16 13 3/4 21 21 1/4 1 1/2 1 3/4 21 5/8 9 18 74

S-180

S-204

24 5/8 12 5/16 29 14 1/2 6 3/8 3 3/16 7 7/16 13 3/4 22 1/4 22 1/2 1 1/2 1 3/4 22 7/8 9 18 90

S-240 27 7/8 13 15/16 30 1/4 15 1/8 8 1/8 3 3/16 5 7/8 14 25 1/2 23 3/4 2 1 3/4 26 1/8 10 20 125

S-280 27 7/8 13 15/16 30 1/4 15 1/8 8 1/8 3 3/16 9-5/8 17 3/4 25 1/2 23 3/4 2 1 3/4 26 1/8 10 20 118

S-300

S-360

33 3/8 16 11/16 37 3/4 18 7/8 9 3 3/16 9 5/8 18 5/8 31 31 1/4 2 1 3/4 31 5/8 13 24 154

36 UH-PRC001-EN

Horizontal Specifications

General

Furnish and install, where indicated

or scheduled on plans Model S

horizontal steam/hot water unit

heaters. Unit shall be equipped as

specified herein. All units shall be

installed in a neat and workmanlike

manner in accordance with this

specification and the manufacturer's

installation instruction.

Casing

Casings are fabricated from 20

gauge die-formed steel. Casing

substrates are prepared for finishing

with a hot wash, iron phosphatizing

clear rinse, chromic acid rinse and

oven drying. Paint finish is leadfree,

chromate free, alkyd melamine resin

base and applied with an

electrostatic two-pass system. Finish

is baked at 350°F.

Coil Models 18 – 360

Coil elements and headers are heavy

wall drawn seamless copper tubing.

Element tubes are brazed into

extruded header junctions. Pipe

connection saddles are cast bronze.

Aluminum fins have drawn collars to

assure permanent bond with

expanded element tubes and exact

spacing. All Element Assemblies are

submersion tested at factory at 250

P.S.I., and are rated at 150 pounds of

saturated steam pressure at 366°F,

under maximum load conditions. We

recommend operating pressure of 75

P.S.I. at 320°F for long life.

Motors

Motors are totally enclosed, resilient

mounted with class “B” windings.

All motors are designed for

horizontal mounting. Motors under

1/3 H.P. are totally enclosed, frame

mounted, 115/1/60 with thermal

overload protection and

permanently lubricated sleeve

bearings with optional solid state

speed controller available. 1/3 H.P.

(115/1/60) motors are open frame

construction, with thermal overload

protection and ball bearings. 1/3 H.P.

at (230V) and1/2 H.P. (230V) motors

are open frame construction, with

thermal overload protection and ball

bearings. 1/3 and 1/2 H.P. motors are

available in single and 3 phase in

open frame construction or

explosion-proof housings, all the

above are available as options.

Explosion Proof Motors

An enclosed motor whose enclosure

is designed and constructed to

withstand an explosion of a specific

gas or vapor which may occur within

the motor and to prevent the ignition

of this gas or vapor surrounding the

machine.

Motors comply with the National

Electrical Code classification as

follows:

Class I, Group D; all sizes

Class II, Group F; all sizes

Class II, Group G; all sizes

Division I & II Installations

T-code (T3B)

Explosion proof equipment is not

generally available for Class I,

Groups A and B and it is necessary

to isolate motors from the hazardous

area. All explosion proof motors are

shelf mounted.

Fans

Fans are aluminum blade, hub type

designed and balanced to assure

maximum air delivery, low motor

horsepower requirements and quiet

operation. Blades are spark proof.

Fan Guards

Fan guards are welded steel, zinc

plated or painted. To meet CSA and

OSHA requirements, units mounted

below 8 feet from floor must be

equipped with an OSHA fan guard.

OSHA fan guards are optional.

Air Deflection Louvers

Units are equipped with horizontal,

individually adjustable louvers. An

optional vertical louver is available

for four-way air control.

Serpentine Coil Specifications

General

Furnish and install, where indicated

or scheduled on plans Model S-A

horizontal hot water unit heaters.

Unit shall be equipped as specified

herein. All units shall be installed in

a neat and workmanlike manner in

accordance with this specification

and the manufacturer's installation

instruction.

Casing

Casings are fabricated from 20

gauge die-formed steel. Casing

substrates are prepared for finishing

with a hot wash, iron phosphatizing

clear rinse, chromic acid rinse and

oven drying. Paint finish is leadfree,

chromate free, alkyd melamine resin

base and applied with an

electrostatic two-pass system. Finish

is baked at 350°F.

Mechanical Specifications

UH-PRC001-EN 37

Mechanical Specifications

Coil Models S-A08– S-A36

Coil is a serpentine design with

seamless copper tubing. Aluminum

fins have drawn collars to assure

permanent bond with expanded

tubes. Tubing connection are 3/8"

copper tubing, type “M” (.500 O.D.).

Coils are factory tested at 250 P.S.I.

Motors

Motors are totally enclosed, resilient

mounted with class “B” windings. All

motors are designed for horizontal

mounting.

Fans

Fans are aluminum blade type,

designed and balanced to assure

maximum air delivery, low motor

horsepower requirements and quiet

operation.

Fan Guards

Fan guards are welded steel, zinc

plated or painted. To meet CSA and

OSHA requirements, units mounted

below 8 feet from floor must be

equipped with an OSHA fan guard.

OSHA fan guards are optional.

Air Deflection Louvers

Units are equipped with horizontal,

individually adjustable louvers.

Vertical Specifications

General

Furnish and install, where indicated

or scheduled on plans Model P

vertical steam/hot water unit heaters.

Unit shall be equipped as specified

herein. All units shall be installed in

a neat and workmanlike manner in

accordance with this specification

and the manufacturer's installation

instruction.

Casing

Casing is 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.

Coil

Hot water/steam coils are rectangular

3 or 4-sided, one-pass, multiple

circuit, with aluminum Sigma-Flow

(there should be a registered sign

after Sigma-Flow) fins mechanically

bonded to tubes. Standard coils are

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. Optional .049

steel tubing is suitable for use for 450

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 unit sizes 336P through

720P 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 fraction 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 speed

control.

Explosion Proof Motors

An enclosed motor whose enclosure

is designed and constructed to

withstand an explosion of a specific

gas or vapor which may occur within

the motor and to prevent the ignition

of this gas or vapor surrounding the

machine. All units are available with

1140 rpm explosion-proof motors.

Fan

Fans are aluminum blade designed

and balanced for quiet operation.

Blades are spark proof.

Louver Cone Diffuser

Optional louver cone diffuser is

available for complete versatility in

air diffusion patterns. Adjustable 18-

gauge steel blades are held in set

position by spring steel clips.

Tr a n e

A business of American Standard Companies

www.trane.com

For more information, contact your local Trane

office or e-mail us at comfort@trane.com

Literature Order Number UH-PRC001-EN

Date August 2007

Supersedes UH-PRC001-EN October 1999

Trane has a policy of continuous product and product data improvement and reserves the right to

change design and specifications without notice.

Trane Sandp Unit Heaters Catalogue UH PRC001 EN

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