Trane UH-SVX01A-EN User Manual

Installation, Operation, and
Maintenance

S&P Unit Heaters

Model Numbers:

UHSA
UHPA

May 2007 UH-SVX01A-EN

Preface and Warnings and Cautions

Hazard Identification

Warnings and Cautions appear at
appropriate sections throughout this
literature. Read these carefully.

WARNING

Indicates a potentially hazardous
situation which, if not avoided, could
result in death or serious injury.

CAUTION

Indicates a potentially hazardous
situation which, if not avoided, may
result in minor or moderate injury. It
may also be used to alert against
unsafe practices.

CAUTION

Indicates a situation that may result
in equipment or property-damage
only accidents.

WARNING

Operational Hazards!

Improper installation, adjustment,
alteration, service or maintenance
can cause property damage, injury or
death. Read the installation,
operating and maintenance
instructions thoroughly before
installing or servicing this
equipment.

WARNING

Compliance Hazards!

Failure to comply with the general
safety information may result in
extensive property damage, severe
personal injury or death.

WARNING

Unit Alterations!

Do not alter the unit heater in any
way or damage to the unit and/or
severe personal injury or death may
occur!

WARNING

Voltage Hazard!

Disconnect all power supplies before
installing or servicing the heater. If
the power disconnect is out of sight,
lock it in the open position and tag it
to prevent unexpected application of
power. Failure to do so could result in
fatal electric shock, or severe
personal injury.

WARNING

Voltage Hazard!

Do not depend upon a thermostat or
other switch as sole means of
disconnecting power when installing
or servicing heater. Always
disconnect power at main circuit
breaker as described above. Failure
to do so could result in fatal electric
shock.

CAUTION
Equipment Damage!

Insure that all power sources
conform to the requirements of the
unit heater or damage to the unit will
result!

Follow installation instructions
CAREFULLY to avoid creating unsafe
conditions. All external wiring must
conform to applicable current local
codes, and to the latest edition of the
National Electric Code ANSI/NFPA
No. 70. In Canada, all external wiring
must conform to the Canadian
Electric Code, Part 1 CSA Standard
C22.1 All wiring should be done and
checked by a qualified electrician
using copper wire only. All steam
and hot water connections should be
made and leaktested by a suitably
qualified individual, per instructions
in this manual. Also follow
procedures listed on the “Unit
Equipment Start-Up Sheet” located
in this manual.

Make certain that the power source
conforms to the electrical
requirements of the heater.

Special attention must be given to
any grounding information
pertaining to this heater. To prevent
the risk of electrocution, the heater
must be securely and adequately
grounded. This should be
accomplished by connecting a
grounded conductor between the
service panel and the heater. To
ensure a proper ground, the
grounding means must be tested by
a qualified electrician.

Do not insert fingers or foreign
objects into the heater or its air
moving device. Do not block or
tamper with the heater in any
manner while in operation or just

after it has been turned off, as some
parts may be hot enough to cause
injury.

Note: To meet CSA and OSHA

requirements, units mounted
below 8 feet (2.4m) from the
floor must be equipped with
an OSHA fan guard.

It is good practice to have a shutoff
switch on the electrical power lines
controlling the heater. Whenever a
unit is serviced, shut power off to the
unit.

Since these units are installed in
most instances higher than 8 feet
(2.4m), proper type of ladders or
scaffolding should be used, as set up
by OSHA requirements. It is the
owner’s responsibility to provide any
scaffolding or other apparatus
required to perform emergency
service or annual/periodic
maintenance to this equipment.

In industrial plants, professional
maintenance crews should service
this equipment.

All Horizontal Unit Heaters are
shipped fully assembled and may be
used for steam or hot water
applications. Coils are factory tested
at 250 psig (1723.5 kg).

All Vertical Unit Heaters are shipped
fully assembled and may be used for
steam or hot water applications.
Coils are factory tested at 400 psig air
under water. Fans are balanced and
motors are prelubricated.

Unless otherwise specified, the
following conversions may be used
for calculating SI unit measurements:

1 foot = 0.305 m

1 inch = 25.4 mm

1 psig = 6.894 kPa

1 pound = 0.453 kg

1 gallon = 3.785 L

1 inch water column = 0.249 kPa

meter/second = FPM ÷ 196.8

liter/second = CFM x 0.472

1000 Btu per hour = 0.293 kW

1000 Btu/Cu. Ft. = 37.5 MJ/m

1 cubic foot = 0.028 m

3

3

© 2007 American Standard All Rights Reserved UH-SVX01A-EN

Contents

Model Number Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Fan Guard/Louver Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Dimensional Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Te c h n i c a l D a t a . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Motor Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Steam Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Hot Water Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Warranty Info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

UH-SVX01A-EN 3

Model Number Description

UHSBA181TAA101A0A0A1

1234567891011121314151617181920

Description

Vertical hydronic unit heaters are
designed for installation requiring
down flow air delivery, offered in 15
sizes ranging from 41,300 to 705,000
BTU/Hr., and use with steam or hot
water. Low output (increased
airflow) units are available for high
ceiling applications.The designs are
certified by CSA (per CAN/CSA-C22.2
and UL1995). Do not alter these units
in any way and do not attach any
ductwork to these units. If you have
any questions after reading this
manual, contact the manufacturer.

Figure 1. Vertical Unit (bottom)

Figure 2. Vertical Unit (top)

Horizontal hydronic unit heaters are
available in both serpentine and
header type units. Serpentine units
offer outputs from 8,030 to 35,900
BTU’s (2.4 to 10.5 kW) and are ideal
for hot water (only) installations with
limited clearances. Header type

horizontal units range from 18,000 to
360,000 (5.3 to 105.5 kW) and can
operate with either hot water or
steam. Both units are furnished with
totally enclosed motors, with
explosion proof motors as optional
on header types. The designs are
certified by CSA (per CAN/CSA-C22.2
and UL1995). Do not alter these

units in any way and do not
attach any ductwork to the
units. If you have any questions

after reading this manual, contact
the manufacturer.

Figure 3. Serpentine Type

Figure 4. Header Type

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 (Coil Type A

"Serpentine")

A08 8,030 BTU/HR
A18 18,400 BTU/HR
A25 24,800 BTU/HR
A36 35,900 BTU/HR

Steam or Hot Water

042 41,300 BTU/HR
064 65,500 BTU/HR
080 80,600 BTU/HR
102 101,80 0 BTU/HR
122 124,400 BTU/HR
146 152,000 BTU/HR
166 173,000 BTU/HR
202 210,200 BTU/HR
252 249,800 BTU/HR
280 283,800 BTU/HR
336 333,400 BTU/HR
384 386,000 BTU/HR
500 496,000 BTU/HR
600 585,000 BTU/HR
720 705,000 BTU/HR

Steam or Hot Water "Header

Type Coil"

018 18,0 0 0 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

4 UH-SVX01A-EN

Model Number Description

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

DIGIT 8—VOLTAGE

1 115/1/60
3 230/1/60 (115 V motor with

Transformer)
4 208/3/60
5 230/3/60
6 460/3/60
7 575/60/3 (Totally Enclosed)

(P only)

DIGIT 9 - MOTOR TYPE

T Totally Enclosed
E Explosion Proof

DIGIT 10- DESIGN SEQUENCE

A

DIGIT 11- TUBE MATERIAL

A Copper
B Steel (P only)

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 18 - 108
only)

DIGIT 19 - VERTICAL LOUVER

0None
A Vertical Louver
B Fin Diffuser (P only)
C Fin Diffuser w/ Coating (Ponly)

DIGIT 12- FAN GUARD

1 OSHA Fan Guard
2 Standard Fan Guard (3 phase

or Explosion Proof motors

only)
3 Standard Fan Guard (Unit

Capacities 240 - 360)

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&guard Line Volts 16

Amps+A32

DIGIT 16 - THERMOSTAT COVER

0None
A Locking Thermostat Cover

UH-SVX01A-EN 5

It is assumed that the design
engineer has selected, sized, and
located in the area to be heated.
However, the information given here
may be of additional help to the
installer. These sketches indicate
suggested basic locations for
different types of unit heaters.

Horizontal unit heaters should be
located to give a circulatory motion,
preferably in the outer perimeter of
the building. The units should be
spaced to properly blanket the areas
with warm air.

The unit should be suspended from
connections provided in the unit by
means of rods. The rods should then
be attached to solid supports of the
building.

Ta b l e 1.

Model

No

A08 8 (2.4) 20 (6.1)

A18 8 (2.4) 25 (7.6)

A25 9 (2.7) 29 (8.8)

A36 9 (2.7) 29 (8.8)

108 11 (3.4) 40 (12.2)

120 12 (3.7) 40 (12.2)

132 13 (4.0) 54 (16.5)

144 13 (4.0) 55 (16.8)

156 13 (4.0) 55 (16.8)

180 13 (4.0) 53 (16.2)

204 13 (4.0) 55 (16.8)

240 14 (4.3) 57 (17.4)

280 14 (4.3) 57 (17.4)

300 15 (4.6) 58 (17.7)

360 15 (4.6) 60 (18.3)

Maximum

Mounting HT.

ft (m)

18 8 (2.4) 20 (6.1)

24 8 (2.4) 24 (7.3)

36 9 (2.7) 28 (8.5)

48 9 (2.7) 30 (9.1)

60 10 (3.0) 30 (9.1)

72 10 (3.0) 29 (8.8)

84 10 (3.0) 30 (9.1)

96 11 (3.4) 38 (11.6)

Approx. Max.
Throw ft (m)

Location

Figure 5.

A narrow area with four exposed
walls either with or without roof
exposure.

Figure 6.

Figure 6 represents a large square

area with exposed walls and roof;
units are blanketing all exposed
surfaces.

Figure 7 is based on 2 PSI (13.8 kPa)

steam pressure and 60 °F (16 °C)
entering air temperature.

H

MAXIMUM DISTANCE OF THROW = T

Figure 7. Mounting Height and Approx. Heat Throw

Figure 8.

A small area with exposed walls
requiring one unit.

6 UH-SVX01A-EN

Location

A

BC

UNIT SIZE

048/060

072

084 & 120

096/108

1-3/4

C

132/144/156

180/204

240/280

300/360

A

15-5/16

16-9/16

19-1/16

17-13/16

21-9/16

22-13/16

26-1/16

31-9/16

1-7/8

2-1/2

3"

2-1/2

3-1/2

4"

4-1/2

11-11/16

10"

6"

1"

BB

C

L

Figure 9. Four Point Suspension-Shelf Mounted Motors Only

C

1-3/4

4 PT. SUSPENSION
USE 3/8-16
THREADED RODS
(4 LOCATIONS)

C

L

D6340

UH-SVX01A-EN 7

Location

"FORCED HOT WATER"

PET COCK

(SYSTEM VENT)

GATE VALVE

RETURN

Figure 10. Forced Hot Water

SUPPLY

GATE VALVE

D-6056

DRAIN VALVE

8 UH-SVX01A-EN

Location

PET COCK

(SYSTEM VENT)

RETURN

GATE VALVE

"FORCED HOT WATER"

(Serpentine Units)

Figure 11. Forced Hot Water: Serpentine Unit Only

SUPPLY

GATE VALVE

DRAIN VALVE

D-6057

UH-SVX01A-EN 9

Location

GATE VALVE

"HIGH PRESSURE STEAM"

SUPPLY

PITCH UP

RETURN

GATE VALVE

PITCH UP

PET COCK

D-6058

BUCKET TRAP

(WITH AIR BYPASS)

Figure 12. High Pressure Steam

10 UH-SVX01A-EN

STRAINER

Location

"LOW PRESSURE STEAM GRAVITY"

SUPPLY

GATE VALVE

PITCH UP

RETURN

AIR VENT

PITCH UP

GATE VALVE

CHECK VALVE

Figure 13. Low Pressure Steam Gravity

UH-SVX01A-EN 11

MIN. SIZE 3/4

D-6059

10" MIN. (254 MM)

Location

GATE VALVE

"LOW PRESSURE

VAPOR OR VACUUM"

SUPPLY

PITCH UP

RETURN

GATE VALVE

PITCH UP

D-6060

F & T TRAP

Figure 14. Low Pressure Vapor Or Vacuum

12 UH-SVX01A-EN

STRAINER

Installation

Installation: P Type

Periodic Service

WARNING

Heavy Objects!

Ensure that all hardware used in the
suspension of each unit heater is
more than adequate for the job.
Failure to do so may result in
extensive property damage, severe
personal injury or death.

CAUTION

Lifting/Suspension Methods!

Make certain that the lifting
methods used to lift the heater and
the method of suspension used in
the field installation of the heater are
capable of uniformly supporting the
weight of the heater at all times.
Failure to heed this warning may
result in property damage or
personal injury!

CAUTION
Structural Integrity!

Make certain that the structure to
which the heater is mounted is
capable of supporting its weight.
Under no circumstances must the
piping or the electrical conduit be
used to support the heater; or
should any other objects (i.e. ladder,
person) lean against the heater or
the electrical conduit for support.

CAUTION
Performance Failure!

Unit heaters must be hung level
from side to side and from front to
back. Failure to do so will result in
poor performance and or premature
failure of the unit.

It is assumed that the design
engineer has selected, sized, and
located in the area to be heated by
the design engineer. However, the
information given here may be of
additional help to the installer.

Vertical unit heaters should be
located to give spot heating or a
circulatory distribution, preferably
near the outer perimeter of the
building. The units should be spaced
to properly blanket the areas with

warm air. Place the units at points of
greatest heat loss. Blanket outside
doorway and provide ample
coverage of window areas. Keep
units away from obstructions that
will impede the full and natural air
delivery of the units.

Install unit heaters to meet CSA and
OSHA requirements; Vertical Unit
Heaters mounted lower than 2.4
meters (8 feet) from the floor must
be equipped with an OSHA fan
guard. Weldnuts are provided at the
top of all units for suspension
purposes. The unit should be
suspended from connections
provided in the unit by means of
rods. The rods should then be
attached to solid supports of the
building.

Units must hang level vertically and
horizontally.

Provide sufficient clearance around
units for maintenance purposes. This
includes at least 7 inches above all
Vertical Unit Heaters even though
the motor is removable through the
bottom.

Isolators are not required but may be
desirable for some applications.
Refer to Table 2 for Unit Weights.

Table 2. Unit Weights-Lbs

Vertical Unit Heaters

Unit Weights (Lbs.)

042 26

064 32

080 36

102 51

122 54

146 69

166 69

202 75

252 115

280 120

336 120

384 126

500 267

600 210

720 260

EXAMPLE

Tabl e 4 lists maximum mounting

height and floor spread data of warm
air coverage at floor level with louver
cone diffusers. Correction factors for
various water temp. and psig of
steam are in Ta b l e 7.

An approximation of the floor spread
when operating on other than 2 lb.
Steam or 219 degree may be
obtained by ratioing the new floor
spread and the maximum mounting
height to that at 2 lb. steam or 219
degree hot water.

Following is an example:

Determine the floor spread and the
maximum mounting height of a std.
model 80 unit heater with a cone
diffuser set at 90 degrees, operating
on 280 degree hot water.

From Ta b l e 6 , maximum mounting
height of a model 80 at 219 degree
hot water is 18.5 ft. with floor
coverage of 14.0 ft. diameter. The
maximum mounting height
correction factor at 280 degree hot
water is 0.80.

18.5 ft. x 0.80 = 14.8 ft.

Maximum mounting height of a
model 80 using 280 degree hot
water.

“X” = floor spread of model 80 using
280 degree hot water.

X = 14.8 x 14.0 / 18.5

X = 207.2 / 18.5

X = 11.2 ft.

UH-SVX01A-EN 13

Installation

Table 3. Maximum Mounting Height in Feet with and without Louver Cone Diffuser

Unit Size Steam Pressure (PSI) Unit Size Steam Pressure (PSI)

042

042*

042L

042L*

064

064*

064L

064L*

080

080*

2

(13.8)5(34.5)10(68.9)50(344.7)75(517.1)

10.5

(3.2)

12.5

(3.8)

7.5

(2.3)

9.0

(2.7)

12.5

(3.8)

14.5

(4.4)

9.0

(2.7)

10.5

(3.2)

12.0

(3.7)

14.5

(4.4)

9.5

(2.9)

11.5

(3.5)

15.0

(4.6)

19.0

(5.8)

11.5

(3.5)

14.0

(4.3)

15.0

(4.6)

18.5

(5.6)

11.0

(3.4)

13.5

(4.1)

10.0

(3.0)

12.0

(3.7)

7.5

(2.3)

8.5

(2.6)

12.0

(3.7)

14.0

(4.3)

8.5

(2.6)

10.0

(3.0)

11.5

(3.5)

14.0

(4.3)

9.0

(2.7)

11.0

(3.4)

14.5

(4.4)

18.5

(5.6)

11.0

(3.4)

13.5

(4.1)

14.5

(4.4)

18.0

(5.5)

10.5

(3.2)

13.0

(4.0)

10.0

(3.0)

12.0

(3.7)

7.5

(2.3)

8.5

(2.6)

12.0

(3.7)

13.5

(4.1)

8.5

(2.6)

10.0

(3.0)

11.5

(3.5)

14.0

(4.3)

9.0

(2.7)

11.0

(3.4)

14.5

(4.4)

18.5

(5.6)

11.0

(3.4)

13.5

(4.1)

14.0

(4.3)

17.5

(5.3)

10.5

(3.2)

13.0

(4.0)

9.0

(2.7)

11.0

(3.4)

7.5

(2.3)

7.5

(2.3)

10.5

(3.2)

12.0

(3.7)

7.5

(2.3)

9.0

(2.7)

10.0

(3.0)

12.0

(3.7)

8.0

(2.4)

9.5

(2.9)

12.5

(3.8)

16.5

(5.0)

9.5

(2.9)

12.0

(3.7)

12.0

(3.7)

15.5

(4.7)

9.0

(2.7)

11.5

(3.5)

8.0

(2.4)

10.0
(3.0)

7.5

(2.3)

7.5

(2.3)

9.5

(2.9)

11.5
(3.5)

7.5

(2.3)

8.5

(2.6)

9.5

(2.9)

11.5
(3.5)

8.0

(2.4)

9.0

(2.7)

12.0
(3.7)

16.0
(4.9)

9.0

(2.7)

11.5
(3.5)

11.5
(3.5)

15.0
(4.6)

8.5

(2.6)

11.0
(3.4)

080L

080L*

102

102*

102L

102L*

122

122L

146

146L

2

(13.8)5(34.5)10(68.9)50(344.7)75(517.1)

18.0

(5.5)

22.0

(6.7)

13.0

(4.0)

17.0

(5.2)

14.0

(4.3)

17.0

(5.2)

11.0

(3.4)

13.5

(4.1)

17.5

(5.3)

21.5

(6.6)

15.0

(4.6)

18.5

(5.6)

16.0

(4.9)

19.5

(5.9)

21.0

(6.4)

26.0

(7.9)

15.5

(4.7)

19.0

(5.8)

18.0

(5.5)

22.5

(6.9)

17.5

(5.3)

21.0

(6.4)

12.5

(3.8)

16.5

(5.0)

13.5

(4.1)

16.5

(5.0)

10.5

(3.2)

13.0

(4.0)

17.0

(5.2)

21.0

(6.4)

14.5

(4.4)

18.0

(5.5)

15.5

(4.7)

19.0

(5.8)

20.5

(6.2)

25.5

(7.8)

15.0

(4.6)

18.5

(5.6)

17.5

(5.3)

22.0

(6.7)

17.5

(5.3)

21.0

(6.4)

12.0

(3.7)

16.0

(4.9)

13.0

(4.0)

16.0

(4.9)

10.5

(3.2)

13.0

(4.0)

16.5

(5.0)

20.5

(6.2)

14.5

(4.4)

18.0

(5.5)

15.5

(4.7)

18.5

(5.6)

20.0

(6.1)

25.0

(7.6)

14.5

(4.4)

18.0

(5.5)

17.5
(5.3)

21.5

(6.6)

15.0

(4.6)

19.0

(5.8)

11.0

(3.4)

14.0

(4.3)

11.5

(3.5)

14.0

(4.3)

9.5

(2.9)

12.0

(3.7)

15.0

(4.6)

18.5

(5.6)

13.0

(4.0)

16.0

(4.9)

14.0

(4.3)

17.0

(5.2)

17.5

(5.3)

22.5

(6.9)

13.0

(4.0)

16.0

(4.9)

15.0

(4.6)

18.5

(5.6)

14.0

(4.3)

18.0

(5.5)

10.5

(3.2)

13.5

(4.1)

11.0

(3.4)

13.5

(4.1)

9.0

(2.7)

11.5

(3.5)

14.5

(4.4)

17.5

(5.3)

12.5

(3.8)

15.0

(4.6)

13.5

(4.1)

16.0

(4.9)

17.0

(5.2)

21.5

(6.6)

12.0

(3.7)

15.5

(4.7)

14.0

(4.3)

18.0

(5.5)

NOTES:

* = Low Speed
L = Low output model with all air ports open
Figures in bold face show maximum mounting height with louver cone diffusers set vertically.
Above table 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.

14 UH-SVX01A-EN

Installation

Table 4. Maximum Mounting Height in Feet with and without Louver Cone Diffuser

Steam Pressure (PSI)

Unit Size

166

166L

202

202L

252

252L

280

280L

336

2

(13.8)5(34.5)10(68.9)50(344.7)75(517.1)

18.0

(5.5)

22.5

(6.9)

22.0

(6.7)

27.5

(8.4)

22.0

(6.7)

27.5

(8.4)

25.5

(7.8)

31.5

(9.6)

20.0

(6.1)

25.0

(7.6)

24.0

(7.3)

29.5

(9.0)

21.0

(6.4)

26.0

(7.9)

25.5

(7.8)

32.0

(9.8)

24.0

(7.3)

30.0

(9.1)

17.5

(5.3)

22.0

(6.7)

21.5

(6.6)

27.0

(8.2)

21.5

(6.6)

27.0

(8.2)

25.0

(7.6)

31.0

(9.4)

19.5

(5.9)

24.0

(7.3)

23.5

(7.2)

28.5

(8.7)

20.5

(6.2)

25.5

(7.8)

25.0

(7.6)

31.0

(9.4)

23.0

(7.0)

29.0

(8.8)

17.0

(5.2)

21.5

(6.6)

21.0

(6.4)

26.5

(8.1)

21.0

(6.4)

26.5

(8.1)

24.5

(7.5)

30.5

(9.3)

19.0

(5.8)

23.5

(7.2)

23.0

(7.0)

28.0

(8.5)

20.0

(6.1)

25.0

(7.6)

24.5

(7.5)

30.0

(9.1)

22.0

(6.7)

28.0

(8.5)

14.5

(4.4)

19.0

(5.8)

18.5

(5.6)

23.5

(7.2)

18.5

(5.6)

24.0

(7.3)

22.0

(6.7)

27.0

(8.2)

17.0

(5.2)

20.5

(6.2)

20.0

(6.1)

24.5

(7.5)

17.5

(5.3)

22.0

(6.7)

21.0

(6.4)

26.0

(7.9)

20.0

(6.1)

25.0

(7.6)

14.0

(4.3)

18.0

(5.5)

17.5

(5.3)

22.5

(6.9)

17.5

(5.3)

23.0

(7.0)

21.0

(6.4)

26.0

(7.9)

16.0

(4.9)

19.5

(5.9)

19.0

(5.8)

23.5

(7.2)

17.0

(5.2)

21.0

(6.4)

20.0

(6.1)

25.0

(7.6)

19.0

(5.8)

24.0

(7.3)

Unit Size

336L

384

384L

500

500L

600

600L

720

720L

2

(13.8)5(34.5)10(68.9)50(344.7)75(517.1)

29.0

(8.8)

36.0

(11.0)

28.5

(8.7)

35.5

(10.8)

32.5

(9.9)

41.0

(12.5)

29.5

(9.0)

36.5

(11.1)

35.0

(10.7)

43.5

(13.3)

34.0

(10.4)

42.5

(13.0)

37.0

(11.3)

46.5

(14.2)

38.5

(11.7)

48.0

(14.6)

42.5

(13.0)

53.0

(16.2)

Steam Pressure (PSI)

28.5

(8.7)

35.0

(10.7)

28.0

(8.5)

35.0

(10.7)

31.5

(9.6)

40.0

(12.2)

29.0

(8.8)

36.0

(11.0)

34.0

(10.4)

42.5

(13.0)

33.0

(10.1)

41.5

(12.6)

36.0

(11.0)

45.5

(13.9)

37.5

(11.4)

47.0

(14.3)

41.5

(12.6)

52.0

(15.8)

28.0
(8.5)

34.0

(10.4)

27.5
(8.4)

34.0

(10.4)

30.5
(9.3)

39.0

(11.9)

28.5
(8.7)

35.5

(10.8)

33.0

(10.1)

41.5

(12.6)

32.0
(9.8)

40.5

(12.3)

35.0

(10.7)

44.5

(13.6)

36.5

(11.1)

46.0

(14.0)

40.5

(12.3)

51.0

(15.5)

25.0

(7.6)

30.0

(9.1)

24.0

(7.3)

30.0

(9.1)

27.5

(8.4)

35.0

(10.7)

25.0

(7.6)

32.0

(9.8)

29.0

(8.8)

35.0

(10.7)

28.0

(8.5)

36.0

(11.0)

31.0

(9.4)

39.0

(11.9)

32.0

(9.8)

40.0

(12.2)

35.0

(10.7)

44.0

(13.4)

24.0

(7.3)

29.0

(8.8)

23.0

(7.0)

29.0

(8.8)

26.5

(8.1)

33.5

(10.2)

24.0

(7.3)

30.5

(9.3)

28.0

(8.5)

34.0

(10.4)

27.0

(8.2)

34.5

(10.5)

30.0

(9.1)

37.0

(11.3)

30.5

(9.3)

39.0

(11.9)

33.5

(10.2)

42.0

(12.8)

NOTES:
* = Low Speed
L = Low output model with all air ports open
Figures in bold face show maximum mounting height with louver cone diffusers set vertically.
Above table 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 5. Maximum Spread

MODEL No. 42 64 80 102 122 146 166 202 252 280 336 384 500 600 720

Spread ft (m) 15

Note: The "spread" is the diameter of the comfort zone at floor level. The above table represents the spread for standard units without a louver cone
diffuser and mounted at its maximum height at 2 psi (13.8 kPa) steam pressure and 60°F (16*C) entering air. (See Tables 21 and 22 for maximum moun
ing heights.)

(4.6)17(5.2)20(6.1)24(7.3)26(7.9)27(8.2)28(8.5)32(9.8)35(10.7)37(11.3)45(13.7)50(15.2)54(16.5)57(17.4)60(18.3)

UH-SVX01A-EN 15

Installation

Table 6. Maximum Mounting Height and Diameter at Floor (Based on 60°F EAT and 219°F EWT or 2 psig steam)

Diffuser Cone 90°

See Figure 5A

Standard Low Output Standard Low Output

HDH D H D H D

Model ft (m) ft (m) ft (m) ft (m) ft (m) ft (m) ft (m) ft (m)

42 12.5

64 14.5

80 18.5

102 17.0

122 19.5

146 19.0

166 22.5

202 27.5

252 25.0

280 26.0

336 30.0

384 35.5

500 36.5

600 42.5

720 48.0

(3.8)

(4.4)

(5.6)

(5.2)

(5.9)

(5.8)

(6.9)

(8.4)

(7.6)

(7.9)

(9.1)

(10.8)

(11.1)

(13.0)

(14.6)

11.0

(3.4)

12.0

(3.7)

14.0

(4.3)

18.0

(5.5)

19.0

(5.8)

20.0

(6.1)

21.0

(6.4)

25.0

(7.6)

27.0

(8.2)

29.0

(8.8)

34.0

(10.4)

39.0

(11.9)

42.0

(12.8)

45.0

(13.7)

46.0

(14.0)

14.5

(4.4)

19.0

(5.8)

22.0

(6.7)

21.5

(6.6)

26.0

(7.9)

22.5

(6.9)

27.5

(8.4)

31.5

(9.6)

29.5

(9.0)

32.0

(9.8)

36.0

(11.0)

41.0

(12.5)

43.5

(13.3)

46.5

(14.2)

53.0

(16.2)

16.0

(4.9)

19.0

(5.8)

23.0

(7.0)

26.0

(7.9)

29.0

(8.8)

30.0

(9.1)

31.0

(9.4)

35.0

(10.7)

38.0

(11.6)

40.0

(12.2)

47.0

(14.3)

52.0

(15.8)

57.0

(17.4)

60.0

(18.3)

63.0

(19.2)

9.0

(2.7)

10.0

(3.0)

12.5

(3.8)

11.0

(3.4)

13.0

(4.0)

12.0

(3.7)

13.0

(4.0)

14.0

(4.3)

13.0

(4.0)

15.0

(4.6)

18.0

(5.5)

20.0

(6.1)

24.0

(7.3)

26.0

(7.9)

28.0

(8.5)

Diffuser Cone 45°

See Figure 5B

20.0

(6.1)

24.0

(7.3)

26.0

(7.9)

31.0

(9.4)

33.0

(10.1)

39.0

(11.9)

42.0

(12.8)

45.0

(13.7)

47.0

(14.3)

50.0

(15.2)

55.0

(16.8)

59.0

(18.0)

65.0

(19.8)

70.0

(21.3)

75.0

(22.9)

11.0
(3.4)

12.0
(3.7)

15.0
(4.6)

14.0
(4.3)

16.0
(4.9)

15.5
(4.7)

18.0
(5.5)

21.0
(6.4)

19.0
(5.8)

21.0
(6.4)

24.0
(7.3)

28.0
(8.5)

30.0
(9.1)

34.0

(10.4)

38.0

(11.6)

25.0

(7.6)

29.0

(8.8)

31.0

(9.4)

35.0

(10.7)

38.0

(11.6)

44.0

(13.4)

48.0

(14.6)

53.0

(16.2)

55.0

(16.8)

60.0

(18.3)

66.0

(20.1)

71.0

(21.6)

76.0

(23.2)

78.0

(23.8)

87.0

(26.5)

16 UH-SVX01A-EN

Installation

Figure 15.

Notes: To meet OSHA requirements, units mounted lower than 8 feet from the floor must be equipped with an OSHA fan guard.

Table 7. Mounting Height Correction Factors

Water °F 150 160 170 180 190 200

Temperature (°C) (66) (71) (77) (82) (88) (93)

Steam PSI - - - - - -

Pressure (kPa) - - - - - -

Correction Factor 1.32 1.27 1.23 1.18 1.14 1.09

Water °F 210 219 227 239 250 259

Temperature (°C) (99) (104) (108) (115) (121) (126)

Steam PSI - 2 5 10 15 20

Pressure (kPa) - (13.8) (34.5) (68.9) (103.4) (137.9)

Correction Factor 1.05 1.00 0.97 0.94 0.89 0.86

Water °F 267 280 287 298 307 320

Temperature (°C) (131) (138) (142) (148) (153) (160)

Steam PSI 25 35 40 50 60 75

Pressure (kPa) (172.4) (241.3) (275.8) (344.7) (413.6) (517.1)

Correction Factor 0.83 0.80 0.76 0.73 0.70 0.69

UH-SVX01A-EN 17

Piping

To provide proper coil operation,
follow all piping recommendations
listed in this manual.

Threaded pipe headers are provided
on all Vertical Units for piping
connections. See Figure 25.
Connections are given in Figure 18
and Figure 19 and Table 27 and

Table 28.

Follow standard practices and codes
when installing the piping. Provide
swing joints for expansion purposes,
unions and shut-off valves for
servicing purposes and as illustrated
in Figure 6 through Figure 9, valves
and traps for control purposes. Use
45 degree angle run-offs from all
supply and return mains.

Dirt pockets should be the same pipe
size as the return tapping of the unit
heater. Also, pipe size in the
branchoff should be the same size as
the tapping in the traps. Beyond the
trap, the return lateral pipe should be
increased one size up to the return
main.

Properly support all piping to unit!
Do not allow piping to place a strain
on the coil or unit. Noise or coil
failure may occur.

It is assumed that the type of system
to be used has been selected by
design engineer. The sketches shown
are for different type of steam
systems or hot water systems. For
sizing of piping, traps, filter, etc.,
consult ASHRAE guides of the
manufacturer’s literature on these
products.

Installation

Figure 16.

Figure 17.

18 UH-SVX01A-EN

Installation

Figure 18.

Figure 19.

UH-SVX01A-EN 19

Installation

Installation: S Type

Unit Mounting

WARNING

Heavy Objects!

Ensure that all hardware used in the
suspension of each unit heater is
more than adequate for the job.
Failure to do so may result in
extensive property damage, severe
personal injury or death.

WARNING

Structural Integrity!

Make certain that the structure to
which the heater is mounted is
capable of supporting its weight.
Under no circumstances must the
gas lines, the venting system, or the
electrical conduit be used to support
the heater; or should any other
objects (i.e. ladder, person) lean
against the heater gas lines, venting
system, electrical conduit for
support. Failure to heed these
warnings may result in property
damage, personal injury, or death.

CAUTION

Lifting/Suspension Methods!

Make certain that the lifting methods
used to lift the heater and the
method of suspension used in the
field installation of the heater are
capable of uniformly supporting the
weight of the heater at all times.
Failure to heed this warning may
result in property damage or
personal injury!

CAUTION
Performance Failure!

Unit heaters must be hung level from
side to side and from front to back.
Failure to do so will result in poor
performance and or premature failure
of the unit.

Install unit heaters to meet
Occupational Safety and Health Act
(OSHA) and CSA requirements. Unit
heaters mounted lower than 8 feet
(2.4m) from the floor must be
equipped with an OSHA fan guard.

Note: Units equipped with the

motor mounted to the fan
guard require two point
suspension. Units equipped
with a shelf mounted motor
are required to be suspended

at four points. Refer to

Figure 20 and Figure 21 for

two point suspension and
refer to Figure 9 for four point
suspension.

Nutserts are provided at the top of all
units for suspension purposes.
Support rods should support the total
unit weight to assure that no strain is
placed on supply and return piping.
Provisions for removal of the unit
from the suspension rods may be
desirable for servicing purposes.

Units must hang level vertically and
horizontally.

Provide sufficient clearance around
units for maintenance purposes.

Isolators are not required but may be
desirable for some applications.
Refer to “Dimensional Data.”

Piping

To provide proper coil operation,
follow all piping recommendations
listed in this manual.

See Figure 13 through Figure 17 for
proper pipe connections.

Follow standard practices and codes
when installing the piping. Provide
swing joints for expansion purposes,
unions and shut-off valves for
servicing purposes and as illustrated
in Figure 13 through Figure 17,
valves and traps for control
purposes. Use 45 degree angle run­offs from all supply and return mains.

Dirt pockets should be the same pipe
size as the return tapping of the unit
heater. Also, pipe size in the
branchoff should be the same size as
the tapping in the traps. Beyond the
trap, the return lateral pipe should be
increased one size up to the return
main.

It is assumed that the design
engineer has selected the type of
system to be used. The sketches
shown are for different types of
steam systems or hot water systems.
For sizing of piping, traps, filter, etc.,
consult ASHRAE guides of the
manufacturer’s literature on these
products.

It is important that the system be
kept clean. Care should be exercised
that excessive joint materials or
foreign substances be kept out of the
system.

On steam systems it is
recommended that the unit be
installed level for proper condensate
drainage. Swing joints should be
used in piping, and pipes should be
pitched down from units so that
condensate can drain freely.

20 UH-SVX01A-EN

OSHA Fan Guard/Louver
Cone Diffuser Installation
Detail

WARNING

Hazardous Voltage

Do not mount either the Louver
Cone Diffuser or OSHA Fan Guard
while unit is in operation or severe
personal injury may occur.
Disconnect all power supplies to the
unit before installing the Louver
Cone Diffuser or OSHA Fan Guard.

The figures below show how both
the OSHA Fan Guard and the Louver
Cone Diffuser are installed on the
Vertical Steam and Hot Water Unit
Heater. Figure 20 and Figure 21
detail how the louver cone diffuser
and OSHA guard are attached to the
unit. Figure 22 and Figure 23 show
full views of the vertical steam and
hot water unit with a Louver Cone
Diffuser and OSHA Fan Guard
attached.

To meet CSA and OSHA
requirements, units mounted below
8 feet (2.4 meters) must be equipped
with an OSHA Fan Guard.

The same screws and washers are
provided with both the OSHA fan
guard and Louver Cone Diffuser. The
screws and washers are used in
conjunction with the Nutserts to
support the wire guard or diffuser to
the orifice panel (bottom of vertical
unit).

Fan Guard/Louver Installation

Figure 20. Louver Cone Diffuser

\

Figure 21. OSHA Fan Guard

UH-SVX01A-EN 21

Fan Guard/Louver Installation

Figure 22. Vertical Unit with Louver Cone Diffuser

Figure 23. Vertical Unit with OSHA Fan Guard

22 UH-SVX01A-EN

Dimensional Data: P Model

Dimensional Data

H

K

F

B

STEAM

RETURN

OR

HOT WATER

SUPPLY

T

P

Figure 24. Models 42-80

GR

A

(4) MOUNTING HOLES

THREAD TAPS

CEILING

D

H

K

R

3

/8 - 16 FOR 42P-80P

P

T

C

E

V

G A

R

L

S

STEAM

SUPPLY

OR

HOT WATER

RETURN

Table 8. 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

UH-SVX01A-EN 23

Dimensional Data

K

H

H

V

UA

V

K

GR

A

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

THREAD TAPS

CEILING

F

B

S

C

E

D

R

1

/2 - 13 FOR 500P-720P

P

T

T

P

L

STEAM

SUPPLY

OR

HOT WATER

RETURN

STEAM

RETURN

OR

HOT WATER

SUPPLY

Figure 25. Models 102-720

Table 9. Roughing in Dimensional Data - Model Size 102-720

Unit

Capacity

(MBH)

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 1/2 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 1/2 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 1/2 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

Fan
Dia. A B C D E F G H KL (Min.)P (NPT) R S T U V

24 UH-SVX01A-EN

Dimensional Data: S Model

Dimensional Data

Figure 26. Serpentine Type Models A08, A18, A25, A36

Note: Motors are totally enclosed, thermally protected, sleeve bearing, with 4" (w) x 2" (h) conduit connection boxes.

3/8-16 nutserts are attached to enclosure for balanced hanging.

Table 10. Table 3- Serpentine Models

MODEL

A08 16 (406) 18 (457) 16 7/32 (412) 11 1/4 (286) 4 1/4 (108) 5 9 (229) 22 (10.0)

A18 16 (406) 18 (457) 16 7/32 (412) 11 1/4 (286) 4 1/4 (108) 5 10 (254) 24 (10.9)

A25 16 (406) 18 (457) 16 7/32 (412) 11 1/4 (286) 4 1/4 (108) 5 10 (254) 25 (11.3)

A36 18 1/2 (470) 20 1/2 (521) 18 22/32 (475) 13 3/4 (349) 5 1/8 (130) 6 12 (305) 31 (14.0)

H inches

(mm)

W inches

(mm)

A inches

(mm)

B inches

(mm)

C inches

(mm)

NO. OF

LOUVERS

NOM. FAN

DIAM. inches

(mm)

APPROX.

SHIP WT. lbs.

(kg)

UH-SVX01A-EN 25

Dimensional Data

Figure 27. Header Type Models 18 thru 360

Note: Motors are totally enclosed, thermally protected, sleeve bearing, with 4" (w) x 2" (h) conduit connection boxes.

3/8-16 nutserts are attached to enclosure for balanced hanging.

26 UH-SVX01A-EN

Table 11. Header Models

MODEL

inches

(mm)

18 14 5/8

(371)

243614 5/8

(371)

486017 1/8

(435)

72 18 3/8

(467)

84 20 7/8

(530)

96

19 5/8

108

(498)

120 20 7/8

(530)

132

23 3/8

144

(594)

156 23 3/8

(594)

180

24 5/8

204

(625)

240 27 7/8

(708)

280 27 7/8

(708)

300

33 3/8

360

(848)

A

B

inches

(mm)

7 5/16

(186)

7 5/16

(186)18(457)9(229)

8 9/16

(217)

9 3/16

(233)

10 7/16

(265)

9 13/16

(249)24(610)12(305)

10 7/16

(265)

11 11/16

(297)

11 11/16

(297)

12 5/16

(313)29(737)

13 15/16

(354)

13 15/16

(354)

16 11/16

(424)

C

inches

(mm)

15

(381)

20 1/2

(521)

21 3/4

(552)

24 1/4

(616)

25 1/4

(641)

27 3/4

(705)

27 3/4

(705)

30 1/4

(768)

30 1/4

(768)

37 3/4

(959)

D

inches

inches

(mm)

(mm)

7 1/2

6 1/8

(191)

(156)

6 1/8

(156)

10 1/4

10 7/8

12 1/8

12 5/8

13 7/8

13 7/8

14 1/2

15 1/8

15 1/8

18 7/8

5 7/8

(260)

(149)

(276)6(152)

6 1/8

(308)

(156)

6 5/16

(160)

6 5/16

(321)

(160)

6 5/16

(352)

(160)

6 5/16

(352)

(160)

6 3/8

(368)

(162)

8 1/8

(384)

(206)

8 1/8

(384)

(206)

(479)9(229)

Dimensional Data

E

F

inches

(mm)

2 15/16

(75)

2 15/16

(75)

2 15/16

(75)

2 15/16

(75)

2 15/16

(75)

3 3/16

(81)

3 3/16

(81)

3 3/16

(81)

3 3/16

(81)

3 3/16

(81)

3 3/16

(81)

3 3/16

(81)

3 3/16

(81)

G*

inches

(mm)

3 1/4

(83)

3 1/4

(83)

5 1/16

(129)

5 1/16

(129)

5 11/16

(144)

7 1/2
(191)

6 11/16

(170)13(330)

7 5/8
(194)14(356)21(533)

7 7/16

(189)

7 7/16

(189)

5 7/8
(149)14(356)

9-5/8
(244)

9 5/8
(244)

H*

inches

(mm)

9 3/8
(238)

9 3/8
(238)

10 15/16

(278)

11 1/16

(281)16(406)

11 13/16

(300)

13 13/16

(351)

13 3/4

(349)

13 3/4

(349)

17 3/4

(451)

18 5/8

(473)31(787)

J

inches

inches

(mm)

(mm)

12 1/4

12 1/4

14 3/4

18 1/2

17 1/4

18 1/2

22 1/4

25 1/2

25 1/2

9 1/2

(311)

(241)

12 1/2

(311)

(318)

(375)15(381)

16 1/4

(413)

18 3/4

(470)

(476)

17 1/2

(438)

(445)

18 3/4

(470)

(476)

21 1/4

(540)

21

21 1/4

(533)

(540)

22 1/2

(565)

(572)

23 3/4

(648)

(603)2(51)

23 3/4

(648)

(603)2(51)

31 1/4

(794)2(51)

K

L

inches

(mm)

1 1/4

(32)

1 1/4

(32)

1 1/4

(32)

1 1/4

(32)

1 1/4

(32)

1 1/2

(38)

1 1/2

(38)

1 1/2

(38)

1 1/2

(38)

1 1/2

(38)

M

inches

(mm)

2 1/4

(57)

2 1/4

(57)

1 3/4

(44)

1 3/4

(44)

1 3/4

(44)

1 3/4

(44)

1 3/4

(44)

1 3/4

(44)

1 3/4

(44)

1 3/4

(44)

1 3/4

(44)

1 3/4

(44)

1 3/4

(44)

N

inches

(mm)

12 7/8

(327)

12 7/8

(327)

15 3/8

(391)

16 5/8

(422)

19 1/8

(486)

17 7/8

(454)

19 1/8

(486)

21 5/8

(549)

21 5/8

(549)

22 7/8

(581)

26 1/8

(664)

26 1/8

(664)

31 5/8

(803)

NOM.

NO.

FAN

OF

DIAM.

LOU-

inches

VERS

(mm)

49

(229)26(11.8)

510

(254)30(13.6)

612

(305)41(18.6)

714

(356)44(19.9)

814

(356)47(21.3)

816

(406)49(22.2)

818

(457)59(26.7)

918

(457)74(33.5)

918

(457)74(33.5)

918

(457)90(40.8)

10 20

(508)

10 20

(508)

13 24

(610)

APPROX.

SHIP

WT. lbs.

(kg)

125

(57)

118

(53)

154

(69.8)

* 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.

UH-SVX01A-EN 27

Technical Data: S Models

The performance data listed in

Tab l e 11 includes 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

RATING for various applications. The

lower the number, the quieter the
unit and the lower the sound
requirement.

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

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

gymnasiums, health clubs, laundromats, supermarkets IV

garages, small machine shops, light manufacturing V

Factories, foundries, steel mills III-VII*

*Depending on specific use in these facilities,

size of operation, etc.

Table 12. Corrections When Using Glycol Solution in System

Propylene
Glycol

Heat transfer @ 180°F (82°C) with
no increase inflow rate

G.P.M. Req'd. @ 180°F (82°C), 20°F
(11°C) ∆
curve)

Pump Head Req'd. @ 180°F (82°C)
w/increase in G.P.M.

Specify gravity (water = 1.0) 1.045-1.055*

Pounds/Gallons @ 60°F (16°C)
(water = 8.3453 Pound/Gallon)

pH @ 50% by volume 9.5

Freezing Point by volume

t (no correction to pump

*Compared to water.

20% solution .97*

50% solution .90*

1.10%*

1.23%*

8.77

55% -

50% -28°F (-33°C)

40% -13°F (-25°C)

30% + 4°F (-16°C)

20% +17°F (- 8°C)

I

III

Table 13. Approximate factors at varying altitudes

Altitude Factor

Sea level - 1000 ft. (305m) 1.00

1000 ft. - 3000 ft. (915m) .958

3000 ft. - 5000 ft. (1524m) .929

5000 ft. - 7000 ft. (2134m) .900

7000 ft. - 10000 ft. (3048m) .871

28 UH-SVX01A-EN

Technical Data

Technical Data: P Model

The performance data listed in

Ta b l e 1 3, Ta b l e 1 4 , 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 vertical 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.

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

gymnasiums, health clubs, laundromats, supermarkets IV

garages, small machine shops, light manufacturing V

factories, foundries, steel mills III-VII*

* Depending on specific use in these facilities,

size of operation, etc.

I

III

Table 14. Corrections When Using Glycol Solution in System

Propylene
Glycol

Heat transfer @ 180°F with no
increase inflow rate

G.P.M. Req'd. @ 180°F, 20°F ∆ t (no
correction to pump curve)

Pump Head Req'd. @ 180°F w/
increase in G.P.M.

Specify gravity (water = 1.0) 1.045-1.055*

Pounds/Gallons @ 60°F (water =

8.3453 Pound/Gallon)

pH @ 50% by volume 9.5

Freezing Point by volume

*Compared to water.

20% solution .97*

50% solution .90*

1.10%*

1.23%*

8.77

55% -

50% -28°F

40% -13°F

30% + 4°F

20% +17°F

Table 15. 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-SVX01A-EN 29

Options

Options: S Models

Variable Speed Control 115 Volt
Only (optional)

The solid state speed controller may
be installed at any convenient
location and is suitable for surface or
flush type mounting. A Standard
electrical single or double gang wall
box is recommended as in Figure 28.

Figure 28. Wiring Diagram of
Speed Control Installation

Installation Procedure:

1. Attach the control's leads to the
electrical leads in the control box
using wire nuts. The speed
control is to be wired in series
with the motor. See wiring
diagram in

2. Make certain wire nuts are tight
with no copper wire being
exposed.

3. Place wires and wire nuts back
into box allowing room for the
control to fit in box also.

4. Mount speed control to box
using number 6 flathead screws
provided.

Setting the Control:

1. Tu r n t h e c o n t rol shaft fully
clockwise. If the motor is not
running at the desired low
speed, adjust the trim on the
face of the control for low speed
setting using a small
screwdriver.

2. Rotate the control shaft counter
clockwise. The speed will
increase smoothly from
minimum to maximum and then
switch off.

Figure 28.

3. Mount face plate with screw
provided and attach control
knob.

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 high or low limit.

Steam Pressure Control

SPDT 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.

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

Line voltage wall thermostats are in
stock for immediate shipment. All
models are SPST with bimetal
thermometer, knob-type set point
adjustment, 40 to 90°F (5 to 30°C)
range and selector switches.

Standard duty models with "off­auto" and "auto-off-fan" 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.

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 with standard motors up to
Model 108 (115/1/60) 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 HP and 230V
motors operate only at rated speed
and CFM - See Tables.

CAUTION

When using electrical accessories,
always refer to the accessory
manufacturer's installation manual
for proper use, location and wiring
instructions.

Figure 29. Horizontal and Vertical Louver Mounting

30 UH-SVX01A-EN

Options

Options: P Models

Variable Speed Control 115 Volt
Only (optional)

The solid state speed controller may
be installed at any convenient
location and is suitable for surface or
flush type mounting. A standard
electrical single or double gang wall
box is recommended as in Figure 30.

Figure 30. Wiring Diagram of
Speed Control Installation

Installation Procedure:

1. Attach the control's leads to the
electrical leads in the control box
using wire nuts. The speed
control is to be wired in series
with the motor. See wiring
diagram in

2. Make certain wire nuts are tight
with no copper wire being
exposed.

3. Place wires and wire nuts back
into box allowing room for the
control to fit in box also.

4. Mount speed control to box
using number 6 flathead screws
provided.

Setting the Control:

1. Turn the control shaft fully
clockwise. If the motor is not
running at the desired low
speed, adjust the trim on the face
of the control for low speed
setting using a small
screwdriver.

2. Rotate the control shaft counter
clockwise. The speed will
increase smoothly from
minimum to maximum and then
switch off.

Vertical Louver Cone Diffuser
(optional)

Rubber mounts and mounting nuts
and bolts are provided with each
louver cone diffuser. Attach the

Figure 30.

diffuser to the bottom of the unit
heater as shown in Figure 51.
Mounting holes are provided in the
unit base plate.

Adjust the diffuser to provide the
desired air pattern.

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 high or low limit.

Steam Pressure Control

SPDT 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.

Thermostats

Line voltage wall thermostats are in
stock for immediate shipment. All
models are SPST with bimetal
thermometer, knob-type set point
adjustment, 40 to 90°F (5 to 30°C)
range and selector switches.
Standard duty models with "off-auto"
and a heavy duty model with "auto­offfan" switching are available. Other
models available on request. Plastic
tamperproof one size fits all
thermostat guards are also available.

Wall Mounted Speed Controllers

Motors up to and including 1/8 HP
(115V) can be operated at reduced
speeds by addition of optional speed
controller. Controller is 5 amps, pre­set at factory for maximum and
minimum speeds, with intermediate

Figure 31. Louver Cone Diffuser
Attached to Vertical Unit Heater

speeds indefinitely controllable. All 1/
3, 1/2 HP and 230V motors operate
only at rated speed and CFM - See
Charts.

Manual Starters

Single and three-phase models are
available. Standard models are
single-speed, toggle-operated,
NEMA Type 1 and are surface­mounted.

CAUTION:

When using electrical accessories,
always refer to the accessory
manufacturer's installation manual
for proper use, location and wiring
instructions.

UH-SVX01A-EN 31

Electrical Connections

Electrical Connections: P
Model

WARNING

Hazardous Voltage

Disconnect all electric power
including remote disconnects before
servicing. Failure to disconnect
power before servicing can cause
severe personal injury or death.

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 can cause
severe personal injury or death.

Standard units are shipped for use
on 115 volt, 60 hertz single phase
electric power. The motor nameplate
and electrical rating on the
transformer should be checked
before energizing the unit heater
electrical system. All external wiring
must conform to ANSI/NFPA No. 70­2002, National Electrical Code (or the
latest edition) and applicable current
local codes; in Canada, to the
Canadian Electrical Code, Part 1 CSA
Standard C22.1.

It is recommended that the electrical
power supply to each unit heater be
provided by a separate, fused and
permanently live electrical circuit. A
disconnect switch of suitable
electrical rating for each unit heater
should be located as close to the
controls as possible. Each unit heater
must be electrically grounded in
accordance with National Electric
Code, ANSI/NFPA No. 70-2002 (or
the latest edition of) or CSA
Standard C22.1. Sample wiring
connections are depicted in

Figure 38 through Figure 40.

Operation

Most basic unit heater systems are
controlled by a room thermostat.
Locate thermostat on inner wall or
column so that optimum control
could be obtained for that area. Set
thermostat for desired temperature.

On steam systems a low limit may
be used to prevent fan from blowing

cold air unless the heater has steam
passing through the coil.

Small hot water systems could have
the circulating pump controlled
directly by the room thermostat. On
large systems, zone valves could be
used to control the individual unit
heater where constant water
circulation is used on the main
system.

A louvered cone air diffuser is
readily available as an optional
accessory for vertical unit heaters.
See catalog for details.

Thermostat Wiring and Location

Note: The thermostat must be

mounted on a vertical
vibration-free surface free
from air currents and in
accordance with the
furnished instructions.

Mount the thermostat approximately
5 feet (1.5 m) above the floor in an
area where it will be exposed to a
free circulation of average
temperature air. Always refer to the
thermostat instructions as well as
our unit wiring diagram and wire
accordingly. Avoid mounting the
thermostat in the following
locations:

1. Cold areas - Outside walls or
areas where drafts may affect
the operation of the control.

2. Hot areas - Areas where the
sun’s rays, radiation, or warm air
currents may affect control
operation.

3. Dead areas - Areas where air
cannot circulate freely, such as
behind doors or in corners.

Note: For all wiring connections,

refer to the wiring diagram
on the motor nameplate.
Should any original wire
supplied with the heater
have to be replaced, it must
be replaced with wiring
material having a
temperature rating of at least
105° C .

Motors

The standard 115/1/60 motors
provided on Vertical Unit Heaters are
totally enclosed, Class “B” insulated
and have built-in thermal overload
protection.

Vertical Units 42 through 80 use
sleeve type bearings. Vertical Units
122 through 280 use permanent split
capacitor motors with ball bearings.

All sleeve bearing motors have oil
holes to allow lubrication. Ball
bearing motors are permanently
lubricated although some three
phase or special motors have
removable plugs which will allow
field installation of grease fittings.

The standard 42 through 102 motors
can be converted to variable speed
operation with the addition of the
solid state speed control.

See Figure 32 through Figure 37 for
typical wiring diagrams.

32 UH-SVX01A-EN

Figure 32. Fan Motor Connections
Low Voltage with Protector Select
Rotation (CCW shown)(Marathon)
For CW Rotation Interchange (Red
and black lead)

Electrical Connections

Figure 35. Fan Motor Connections
115/1/60 Constant Speed, Two Lead
(GE, Marathon, Universal)

Figure 34. Fan Motor Connections
Low Voltage CCW Internal
(Marathon)

Figure 33.

UH-SVX01A-EN 33

Electrical Connections

Wiring Installation: P Model

Notice

1. When using a speed controller,
always locate the thermostat
between the speed controller
and the line, not between the
motor and the controller.

2. For internal wiring and overload
protection on all starters, consult
the control manufacturer for
details.

3. When using thermostatic control
with a manual starter, be sure
that the electrical rating of the
thermostat is sufficient to carry
the motor current.

1 PHASE LINE

MANUAL STARTING
SWITCH

MOTOR

1 PHASE LINE

MAGNETIC
STARTING SWITCH

THERMOSTAT

MOTOR

THERMOSTATIC CONTROL

USING MAGNETIC STARTER

OPERATING SEVERAL UNITS

Figure 38.

1 PHASE LINE

MANUAL STARTING
SWITCH

THERMOSTAT

MOTOR

3 PHASE LINE

MANUAL STARTING
SWITCH

MOTOR

MANUAL CONTROL WITH

THREE PHASE MOTOR

Figure 41.

3 PHASE LINE

MAGNETIC
STARTING SWITCH

THERMOSTAT

MOTORS

MANUAL CONTROL WITH

SINGLE PHASE MOTOR

Figure 36.

1 PHASE LINE

MANUAL STARTING
SWITCH

MOTOR

ROOM THERMOSTAT

THERMOSTATIC CONTROL

WITH MANUAL STARTER

Figure 37.

SPEED CONTROLLER

SPEED CONTROLLER WITH

MANUAL STARTING SWITCH

Figure 39.

1 PHASE LINE

MAGNETIC
STARTING SWITCH

THERMOSTAT

SPEED CONTROLLERS WITH

MAGNETIC STARTING SWITCH

FOR OPERATING SEVERAL UNITS

MOTORS

SPEED
CONTROLLERS

Figure 40.

MOTOR

THERMOSTATIC CONTROL

OF SEVERAL THREE PHASE UNITS

Figure 42.

1 PHASE LINE

MANUAL STARTING
SWITCH

MOTOR

LIMIT CONTROLLER

ROOM THERMOSTAT

THERMOSTATIC CONTROL WITH

ACTING LIMIT CONTROLLER

AND MANUAL STARTER

REVERSE ACTING

Figure 43.

34 UH-SVX01A-EN

Electrical Connections

3 PHASE LINE

MANUAL STARTING
SWITCH

LIMIT CONTROLLER
REVERSE ACTING

MOTOR

MANUAL CONTROL WITH

THREE PHASE MOTOR

THERMOSTAT

Figure 44.

1 PHASE LINE

MANUAL STARTER
WITH BUILT IN
SELECTOR SWITCH

THERMOSTAT

LIMIT CONTROLLER

MOTOR

THREE POSITION SELECTOR SWITCH

BUILT INTO MAGNETIC STARTER FOR

MANUAL OR THERMOSTATIC CONTROL

Figure 45.

1 PHASE LINE

MANUAL STARTING

SWITCH

SELECTOR
SWITCH

MOTOR

THREE POSITION SELECTOR SWITCH

USED FOR EITHER MANUAL

OR THERMOSTATIC CONTROL

THERMOSTAT

LIMIT CONTROLLER

Figure 46.

Electrical Connections: S
Model

WARNING

Hazardous Voltage

Disconnect all electric power
including remote disconnects before
servicing. Failure to disconnect
power before servicing can cause
severe personal injury or death.

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 can cause severe personal
injury or death.

Standard units are shipped for use
on 115 volt, 60 hertz single phase
electric power. The motor nameplate
and electrical rating on the
transformer should be checked
before energizing the unit heater
electrical system. All external wiring
must conform to ANSI/NFPA No. 70­2002, National Electrical Code (or the
latest edition) and applicable current
local codes; in Canada, to the
Canadian Electrical Code, Part 1 CSA
Standard C22.1.

It is recommended that the electrical
power supply to each unit heater be
provided by a separate, fused and
permanently live electrical circuit. A
disconnect switch of suitable
electrical rating for each unit heater
should be located as close to the
controls as possible. Each unit heater
must be electrically grounded in
accordance with National Electric
Code, ANSI/NFPA No. 70-2002 (or the
latest edition) or CSA Standard C22.1.
Sample wiring connections are
depicted in Figure 49 through

Figure 57.

Operation

Most basic unit heater systems are
controlled by a room thermostat.
Locate thermostat on inner wall or
column so that optimum control can
be obtained for that area. Set
thermostat for desired temperature.

On steam systems a low limit may be
used to prevent fan from blowing
cold air unless the heater has steam
passing through the coil.

Small hot water systems could have
the circulating pump controlled
directly by the room thermostat. On
large systems, zone valves could be
used to control the individual unit
heater where constant water
circulation is used on the main
system.

Horizontal louvers are standard
equipment on horizontal unit
heaters, vertical louvers are available
as an optional accessory.

Thermostat Wiring and Location

Note: The thermostat must be

mounted on a vertical
vibration-free surface free
from air currents and in
accordance with the
furnished instructions.

Mount the thermostat approximately
5 feet (1.5 m) above the floor in an
area where it will be exposed to a
free circulation of average
temperature air. Always refer to the
thermostat instructions as well as our
unit wiring diagram and wire
accordingly. Avoid mounting the
thermostat in the following locations:

1. Cold areas - Outside walls or
areas where drafts may affect the
operation of the control.

2. Hot areas - Areas where the
sun's rays, radiation, or warm air
currents may affect control
operation.

3. Dead areas - Areas where air
cannot circulate freely, such as
behind doors or in corners.

Note: For all wiring connections,

refer to the wiring diagram
on the motor nameplate.
Should any original wire
supplied with the heater have
to be replaced, it must be
replaced with wiring material
having a temperature rating
of at least 105° C.

UH-SVX01A-EN 35

Electrical Connections

Wiring Installation: S Model

Notice

1. When using a speed controller,
always locate the thermostat
between the speed controller
and the line, not between the
motor and the controller.

2. For internal wiring and overload
protection on all starters, consult
the control manufacturer for
details.

3. When using thermostatic control
with a manual starter, be sure
that the electrical rating of the
thermostat is sufficient to carry
the motor current.

1 PHASE LINE

MANUAL STARTING
SWITCH

MOTOR

1 PHASE LINE

MAGNETIC
STARTING SWITCH

THERMOSTAT

MOTOR

THERMOSTATIC CONTROL

USING MAGNETIC STARTER

OPERATING SEVERAL UNITS

Figure 49.

1 PHASE LINE

MANUAL STARTING
SWITCH

THERMOSTAT

MOTOR

3 PHASE LINE

MANUAL STARTING
SWITCH

MOTOR

MANUAL CONTROL WITH

THREE PHASE MOTOR

Figure 52.

3 PHASE LINE

MAGNETIC
STARTING SWITCH

THERMOSTAT

MOTORS

MANUAL CONTROL WITH

SINGLE PHASE MOTOR

Figure 47.

1 PHASE LINE

MANUAL STARTING
SWITCH

MOTOR

ROOM THERMOSTAT

THERMOSTATIC CONTROL

WITH MANUAL STARTER

Figure 48.

SPEED CONTROLLER

SPEED CONTROLLER WITH

MANUAL STARTING SWITCH

Figure 50.

1 PHASE LINE

MAGNETIC
STARTING SWITCH

THERMOSTAT

SPEED CONTROLLERS WITH

MAGNETIC STARTING SWITCH

FOR OPERATING SEVERAL UNITS

MOTORS

SPEED
CONTROLLERS

Figure 51.

MOTOR

THERMOSTATIC CONTROL

OF SEVERAL THREE PHASE UNITS

Figure 53.

1 PHASE LINE

MANUAL STARTING
SWITCH

MOTOR

LIMIT CONTROLLER

ROOM THERMOSTAT

THERMOSTATIC CONTROL WITH

ACTING LIMIT CONTROLLER

AND MANUAL STARTER

REVERSE ACTING

Figure 54.

36 UH-SVX01A-EN

3 PHASE LINE

MANUAL STARTING
SWITCH

LIMIT CONTROLLER
REVERSE ACTING

MOTOR

MANUAL CONTROL WITH

THREE PHASE MOTOR

Figure 55.

1 PHASE LINE

MANUAL STARTER
WITH BUILT IN
SELECTOR SWITCH

Electrical Connections

THERMOSTAT

THERMOSTAT

LIMIT CONTROLLER

MOTOR

THREE POSITION SELECTOR SWITCH

BUILT INTO MAGNETIC STARTER FOR

MANUAL OR THERMOSTATIC CONTROL

Figure 56.

1 PHASE LINE

MANUAL STARTING

SWITCH

SELECTOR
SWITCH

MOTOR

THREE POSITION SELECTOR SWITCH

USED FOR EITHER MANUAL

OR THERMOSTATIC CONTROL

THERMOSTAT

LIMIT CONTROLLER

Figure 57.

UH-SVX01A-EN 37

Motor Data: P Models

Motor Data

CAUTION

Voltage Selections

Select appropriate AMP, MCA, and
MOP for the multiple voltage
motors. For example, the AMP, MCA,
and MOP for Model 40 with a 230
volt Totally Enclosed motor is 1.1,

1.4, and 2.5 respectively.

Note: 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: Stated draw is Full Load

(FLA). AMP draw varies by
motor manufacturer ± .2
AMPS. Verify FLA on motor
data plate.

For Table 16
* Optional variable speed switch is available.
** These motors have automatic thermal over-

load protection or impedance protection.
*** These motors are 230/460 volts only.
† Models 336 through 720 are not available for

either Totally Enclosed or Explosion Proof

with Overload 115/1/60 motor types.

Table 16. Standard (Totally Enclosed) Motor Type [MT=1]

Unit Model No. AMP MCA MOP HP RPM

115/1/60† Operating Voltage

42 1.23** 1.6 2.8 1/40* 1550

64 2.1** 2.6 4.7 1/20* 1550

80

102 1.2** 1.5 2.7 1/8* 1070

122

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 Operating Voltage

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

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

80

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

122

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

384

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

600

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

575/3/60 Operating Voltage

42

64

80

102

122

146

166

202

252

280 0.8 1.0 1.8 1/2 1140

336 1.3 1.6 2.9 3/4 1140

384

500 2.0 2.5 4.5 1-1/2 1160

600

720 3.8 4.7 8.4 3 1165

2.3** 2.9 5.2 1/6 1100

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

0.6 0.8 1.4 1/3 1140

38 UH-SVX01A-EN

Motor Data

Table 17. Explosion Proof with Thermal Overload Motor Type [MT=2]

Unit Model

No. AMP MCA MOP HP RPM

115/1/60† Operating Voltage

42 3.8 4.8 8.6 1/6 1140

64 3.8 4.8 8.6 1/6 1140

80

102 3.8 4.8 8.6 1/6 1140

122

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 Operating Voltage

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

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

80

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

122

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

384

500 5.0/2.5*** 6.5/3.3 11.7/5.9 1-1/2 1150

600

720 10.0/5.0*** 12.5/6.3 22.5/11.3 3 1150

3.8 4.8 8.6 1/6 1140

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

in motor data. All 1/4 H.P.
motors are P.S.C.

Note: 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: 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: Stated AMP draw is Full Load

Amp (FLA). AMP draw varies
by motor manufacturer ± 0.2
AMPS. Verify FLA per unit
motor data plate.

For Table 17
* Optional variable speed switch is available.
** These motors have automatic thermal over-

load protection or impedance protection.
*** These motors are 230/460 volts only.
† Models 336 through 720 are not available for

either Totally Enclosed or Explosion Proof

with Overload 115/1/60 motor types.

Motor Data: S Models

CAUTION

Voltage Selections

Select appropriate AMP, MCA, and
MOP for the multiple voltage motors.
For example, the AMP, MCA, and
MOP for Models 360 with a 460 volt
Totally Enclosed motor is 1.3, 1.6, and

2.9 respectively.

Also refer to Maintenance section for
additional motor data.

UH-SVX01A-EN 39

Note: 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 factory­calibrated for low and high
speed ratings, with
intermediate speeds infinitely
controllable. Models 120
through 360 operate at
constant speed as indicated

Motor Data

Table 18. Totally Enclosed Motor Type

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

*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.

Table 19. Explosion Proof with Thermal Overload Motor Type

Unit Model No. AMP MCA MOP HP RPM AMP MCA MOP HP RPM

115-230/1/60 230/460/3/60

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

240, 280, 300 7.4-3.7 9.3-4.7 16.7-8.3 1/3*** 1140 2.2/1.1 2.8/1.4 5.0/2.5 1/3 1140

360 7.4-3.7 9.3-4.7 16.7-8.3 1/2*** 1140 2.2/1.1 2.8/1.4 5.0/2.5 1/3 1140

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

40 UH-SVX01A-EN

Table 20. Model S Header Type Only

Output

Unit Size

018

024

036

048

060

072

084

096

108,000

108

120 120,000

132 132,000

144 144,000

156 156,000

180 180,000

204 204,000

240 240,000

BTU/

HR*

(kW)

18,000

(5.3)

16,200

(4.7)

24,000

(7.0)

21,600

(6.3)

36,000

(10.5)

32,400

(9.5)

48,000

(14.1)

43,200

(12.7)

60,000

(17.6)

54,000

(15.8)

72,000

(21.1)

64,800

(19.0)

84,000

(24.6)

75,600

(22.2)

96,000

(28.1)

86,400

(25.3)

(31.6)

97,200

(28.5)

(35.2)

(38.7)

(42.2)

(45.7)

(52.7)

(59.8)

(70.3)

Cond.
lbs./hr.
(kg/hr)

18.0
(8.2)75(7.0)

16.2
(7.3)68(6.3)

24.5

(11.1)

22.0

(10.0)90(8.4)

37.0

(16.8)

33.0

(14.9)

49.0

(22.2)

44.0

(19.9)

61.0

(27.6)

55.0

(24.9)

73.0

(33.1)

66.0

(29.9)

85.0

(38.5)

76.0

(34.4)

97.0

(43.9)

88.0

(39.9)

110.0

(49.8)

98.0

(44.4)

122.0

(55.3)

134.0

(60.7)

146.0

(66.1)

160.0

(72.5)

190.0

(86.1)

208.0

(94.2)

244.0

(110.5)

E.D.R.

Sq. Ft.

(sq. m)

(9.3)

(13.9)

(12.5)

(18.6)

(16.7)

(23.2)

(20.9)

(27.9)

(25.1)

(32.5)

(29.3)

(37.2)

(33.4)

(41.8)

(37.6)

(46.5)

(51.1)

(55.7)

(60.4)

(71.5)

(79.0)

1000

(92.9)

100

150

135

200

180

250

225

300

270

350

315

400

360

450

405

500

550

600

650

770

850

Steam Performance Data

Final Air

Deg. °F

(Deg. °C)

102

(39)

105

(41)

109

(43)

112

(44)

119

(48)

120

(49)

119

(48) 1/20

123

(51)

121

(49) 1/20

131

(55)

120

(49) 1/20

123

(51)

115

(46) 1/12

123

(51)

123

(51) 1/12

132

(56)

115

(46) 1/12

120

(49)

118

(48)

121

(49)

120

(49)

115

(46)

135

(57)

124

(51)

123

(51)

Motor HP

(kW) RPM

16 Watts

16 Watts

25 Watts

(.037)

(.037)

(.037)

(.062)

(.062)

(.062)

1/3

(.249)

1/3

(.249)

1/3

(.249)

1/3

(.249)

1/3

(.249)

1/3

(.249)

1/3

(.249)

Nominal

CFM (m

1550 395

1350 330

1550 450

1350 380

1550 550

1350 480

1000 750

900 630

1000 900

900 700

1000 1100

900 950

1000 1400

900 1100

1000 1400

900 1100

1000 1800

900 1500

1140 1900

1140 2000

1140 2200

1140 2600

1140 2200

1140 2900

1140 3500

(.186)

(.156)

(.212)

(.179)

(.260)

(.227)

(.354)

(.297)

(.425)

(.330)

(.519)

(.448)

(.661)

(.519)

(.661)

(.519)

(.850)

(.708)

(.897)

(.944)

(1.038)

(1.227)

(1.038)

(1.369)

(1.652)

3

/s)

Outlet FPM

(m/s)

395

(2.007)

330

(1.676)

450

(2.286)

380

(1,930)

550

(2.794)

480

(2.438)

550

(2.794)

460

(2.337)

650

(3.302)

510

(2.591)

800

(4.064)

700

(3.556)

900

(4.572)

750

(3.810)

930

(4.724)

800

(4.064)

1000

(5.080)

900

(4.572)

900

(4.572)

950

(4.826)

1000

(5.080)

1150

(5.842)

800

(4.064)

1000

(5.080)

900

(4.572)

Nom. Amps

@ 115 VAC†

0.80

0.80

1.2

1.4

1.4

1.4

2.2

2.2

2.2

4.5 18

4.5 18

4.5 18

4.5 18

4.5 18

4.5 18

4.5 20

Nom. Fan

Diam. Inches

(mm)

9

(228.6)

9

(228.6)

10

(254.0)

10

(254.0)

10

(254.0)

10

(254.0)

12

(304.8)

12

(304.8)

12

(304.8)

12

(304.8)

14

(355.6)

14

(355.6)

14

(355.6)

14

(355.6)

16

(406.4)

16

(406.4)

16

(406.4)

16

(406.4)

(457.2)

(457.2)

(457.2)

(457.2)

(457.2)

(457.2)

(508.0)

UH-SVX01A-EN 41

Steam Performance Data

Table 20. Model S Header Type Only (continued)

Output

BTU/

Unit Size

280 280,000

300 300,000

360 360,000

Performance based on 2# steam pressure (13.8 kpa) at heater with air entering @ 60°F (16°C).
For Sound Ratings See Pages 28 and 29.
Use conversion table for all metric conversions.
* For the lower output, an optional Speed Controller must be ordered.
†Stated AMP is full load for the standard motors. AMP draw varies by motor manufacturer ± 0.2 AMPS. Please see your unit's motor data plate for exact (FLA) Full Load Amp

rating.

HR*

(kW)

(82.0)

(87.9)

(105.5)

Table 21. Steam Calculations and Correction Factors

I. CAPACITY

A. For 2 lbs. steam, 60° entering air

B. For higher steam pressures and/or E.A.T.'s above
or below 60°F

II. FINAL AIR TEMPERATURE

A. For 2 lbs. steam, 60° entering air

B. For capacities calculated in I.B. (above) Output from I.B./1.085 x CFM from Tab l e 2 0 +

III. FINAL AIR VOLUME

A. For 2 lbs. steam, 60° entering air

B. For final air temperatures calculated in II.B.
(above)

IV. CONDENSATE PER HOUR

A. For 2 lbs. steam, 60° entering air

B. For capacities calculated in I.B. (above) Output from I.B. / Latent Heat From Tab l e 2 3 =

Cond.
lbs./hr.
(kg/hr)

280.0

(126.8)

310.0

(140.4)

366.0

(165.8)

E.D.R.

Sq. Ft.

(sq. m)

1100

(102.2)

1250

(116.1)

1500

(139.4)

Final Air

Deg. °F

(Deg. °C)

121

(49)

117

(47)

120

(49)

Motor HP

(kW) RPM

1/2

(.373)

1/2

(.373)

1/2

(.373)

Read output directly from Tab l e 2 0 , 24,000 BTU/
HR. (Ref., Std. 24).

Multiply output from Ta ble 2 0 by appropriate
correction factor from Tab l e 22

Read temperature directly from Tab l e 20, 109°F.
(Ref., Std. 24)

E.A.T. = Final Air Temp

460 + Final Air Temp from Ta b l e 2 0 / 530 x Nom.
CFM from Tab l e 2 0 = Final Air Volume

460 + Final Air Temp from II.B. / 530 x Nom. CFM
from Table 2 0 = Final Air Volume

Read lbs. per hour from Tab l e 20, 24.5 LBS./HR.
(Ref., Std. 24).

lbs. per hour of condensate

1100 4200

1100 5000

1100 5500

Nominal

CFM (m3/s)

(1.982)

(2.360)

(2.596)

Outlet FPM

(m/s)

980

(4.978)

700

(3.556)

1000

(5.080)

Nom. Amps

@ 115 VAC†

5.4 20

5.4 24

5.4 24

EXAMPLE:

Unit Size: ___________ 24
Steam Pressure____ 10 PSI
Entering Air Temp. ___ 40°F

24,000 x 1.29 = 30,960 BTU/HR.

30,960/1.085 x 450 + 40 = 103.4°F.

460 + 109 / 530 x 450 = 483 CFM

460 + 103.4 / 530 x 450 = 478 CFM

30,960 / 953 = 32.5 LBS./HR.

Nom. Fan

Diam. Inches

(mm)

(508.0)

(609.6)

(609.6)

Table 22. STEAM CORRECTION FACTORS BASED ON 2 PSI (13.8 kPa) STEAM AND 60 Deg. F (16 Deg. C) E.A.T.

ENTERING

AIR TEMP

Deg. F

(Deg. C)

30 -(1) 1.19 1.24 1.29 1.38 1.44 1.50 1.60 1.68 1.70 1.90 2.02 2.11 2.20

40 (4) 1.11 1.16 1.21 1.29 1.34 1.42 1.51 1.60 1.66 1.81 1.93 2.02 2.11

50 (10) 1.03 1.08 1.13 1.21 1.28 1.33 1.43 1.51 1.58 1.72 1.84 1.93 2.02

60 (16) 0.96 1.00 1.05 1.13 1.19 1.25 1.35 1.43 1.50 1.64 1.75 1.84 1.93

70 (21) 0.88 0.93 0.97 1.06 1.12 1.17 1.27 1.35 1.42 1.55 1.66 1.76 1.84

80 (27) 0.81 0.85 0.90 0.98 1.04 1.10 1.19 1.27 1.34 1.47 1.58 1.68 1.76

90 (32) 0.74 0.78 0.83 0.91 0.97 1.02 1.12 1.19 1.26 1.39 1.50 1.59 1.67

100 (38) 0.67 0.71 0.76 0.84 0.89 0.95 1.04 1.12 1.19 1.32 1.42 1.51 1.59

0

(0)2 (13.8)5 (34.5)

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

10

(68.9)

15

(103.4)

20

(137.9)

30

(206.8)

40

(275.8)

50

(344.7)

75

(517.1)

100

(689.4)

125

(861.8)

150

(1,034.1)

42 UH-SVX01A-EN

Steam Performance Data

Table 23. PROPERTIES OF SATURATED STEAM

STEAM PRESSURE IN PSIG (kPa)

Steam Pressure
psi (kPa)

Steam Temperature
Deg. F (Deg. C)

Latent Heat of Steam
Btu/lbm (KJ/Kg)

Table 24. Model P Standard Units

Unit

Capacity

(MBH)

042

064

080

102

122 124,400

146 152,000

166 173,000

202 210,200

252 249,800

280 283,800

336 333,400

384 386,000

500 496,000

600 585,000

720 705,000

Output

BTU/HR

(kW)

41,300

(12.1)

33,600

(9.8)

65,500

(19.2)

52,800

(15.5)

80,600

(23.6)

65,100

(19.1)

101,800

(29.8)

87,900

(25.8)

(36.4)

(44.5)

(50.7)

(61.6)

(73.2)

(83.2)

(97.7)

(113.1)

(145.3)

(171.4)

(206.6)

0

(0)2 (13.8)5 (34.5)

212

218.5

(100)

(103.6)

970

43

(19.5)

55

(24.9)

68

(30.8)

55

(24.9)

83

(37.6)

67

(30.4)

106

(48.0)

91

(41.2)

129

(58.4)

157

(71.1)

179

(81.1)

208

(94.2)

260

294

345

400

514

605

729

966

(2247)

(Sq. m)

E.D.R.
Sq. ft.

(16.0)

(13.0)

(25.4)

(20.5)

(31.3)

(25.2)

(39.4)

(34.0)

(48.2)

(58.9)

(67.0)

(78.0)

(96.7)

(109.8)

(129.3)

(149.8)

(192.6)

(227.0)

(273.5)

(2256)

Condensate

lbs./hr

(kg/hr)

(117.8)

(133.2)

(156.3)

(181.2)

(232.8)

(274.1)

(330.2)

227.1

(108.4)

(2235)

172

140

273

220

336

271

424

366

518

633

720

838

1040

1180

1390

1610

2070

2440

2940

(68.9)

239.4

(115.2)

961

(2217)

Final Air
Temp °F

(°C)

124

(51)

131

(55)

121

(49)

129

(54)

122

(50)

130

(54)

123

(51)

129

(54)

124

(51)

123

(51)

121

(49)

118

(48)

115

(46)

119

(48)

119

(48)

118

(48)

117

(47)

117

(47)

119

(48)3(2.237)

10

953

15

(103.4)

249.8

(121.0)

946

(2200)

Motor

H.P. (kW)

1/40

(.019)

1/20

(.037)

1/20

(.037)

1/8

(.093)

1/6

(.124)

1/6

(.124)

1/6

(.124)

1/4

(.186)

1/4

(.186)

1/2

(.373)

3/4

(.559)

3/4

(.559)

1-1/2

(1.119)

1-1/2

(1.119)

20

(137.9)

(126.0)

(206.8)

258.8

(2186)

274.0

(134.4)

940

929

(2161)

Motor

RPM

1550 595

1150 436

1550 989

1150 706

1550 1200

1150 858

1070 1490

850 1180

1100 1790

1100 2220

1100 2620

1100 3200

1100 4180

1100 4430

1140 5210

1140 6140

1175 8020

1175 9450

1165 11,000

30

(275.8)

(141.5)

Nominal

CFM (m

(.278)

(.203)

(.462)

(.329)

(.560)

(.400)

(.695)

(.551)

(.835)

(1.036)

(1.223)

(1.493)

(1.951)

(2.067)

(2.431)

(2.865)

(3.743)

(4.410)

(5.133)

40

286.7

920

(2140)

3

/s)

50

(344.7)

297.7

(147.6)

912

(2121)

Outlet Velocity

FPM (m/s) Sound Rating

(517.1)

319.9

(159.9)

(2072)

877

(4.455)

658

(3.343)

1005

(5.105)

727

(3.693)

1220

(6.198)

894

(4.542)

980

(4.978)

783

(3.978)

1170

(5.944)

1045

(5.309)

1230

(6.248)

1495

(7.595)

1205

(6.121)

1275

(6.477)

1500

(7.620)

1770

(8.992)

1640

(8.331)

1930

(9.804)

2250

(11.430)

75

891

100

(689.4)

337.9

(169.9)

881

(2049)

I

II

II

II

III

III

IV

III

IV

IV

IV

IV

IV

IV

IV

125

(891.8)

352.9

(178.3)

868

(2019)

150

(1,034.1)

365.9

(185.5)

857

(1993)

E.D.R. = Equivalent Direct Radiation
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.
** Performance data based on 2 lbs. steam pressure at heater with air entering @60°F.
To determine BTU per hour capacities at various steam pressures and entering air temperatures, use conversion factors from Table 7. Final temperatures at new conditions can

be calculated by applying basic formula.

UH-SVX01A-EN 43

Steam Performance Data

Table 25. "Low Output" Standard Vertical Units with All Air Ports Open

Unit

Capacity

(MBH)

042L

064L

080L

102L

122L 111,000

146L 125,000

166L 149,000

202L 176,800

252L 214,900

280L 251,800

336L 291,000

384L 344,000

500L 428,000

600L 515,000

720L 620,000

Output

BTU/HR

34,800

(10.2)36(16.3)

26,000

57,200 59 238 104

(16.8) (26.7) (22.1) (40) (.560) (6.045)

45,800 48 191 109 1150 862 858

(13.4) (21.7) (17.8) (43) (.402) (4.359)

68,000

(19.9)71(32.2)

55,000

(16.1)57(25.8)

85,400

(25.0)89(40.3)

71,200

(20.9)74(33.5)

(32.5)

(36.6)

(43.7)

(51.8)

(63.0)

(73.8)

(85.3)

(100.8)

(125.4)

(150.9)

(181.7)

(kW)

(7.6)

Condensate

lbs./hr

(kg/hr)

27

(12.2)

115

(52.1)

130

(58.9)

154

(69.8)

183

(82.9)

224

(101.5)

260

(117.8)

302

(136.8)

356

(161.3)

446

(202.0)

533

(241.4)

642

(290.8)

E.D.R.
Sq. ft.

(Sq. m)

145

(13.5)

108

(10.0)

283

(26.3)

229

(21.3)

356

(33.1)

296

(27.5)

462

(43.0)

524

(48.7)

620

(57.7)

736

(68.5)

895

(83.3)

1050

(97.7)

1210

(112.6)

1430

(133.0)

1785

(166.0)

2140

(199.1)

2580

(240.0)

Final Air

Temp. °F °CMotor H.P.

108

(42)

111

(44)

106

(41)

111

(44)

108

(42)

111

(44)

107

(42)

109

(43)

107

(42)

108

(42)

104

(40)

106

(41)

107

(42)

108

(42)

102

(39)

106

(41)

108

(42)

(kW)

1/40

(.019)

1/20

(.037)

1/20

(.037)

1/8

(.093)

1/6

(.124)

1/6

(.124)

1/6

(.124)

1/4

(.186)

1/4

(.186)

1/2

(.373)

3/4

(.559)

3/4

(.559)

1-1/2

(1.119)

1-1/2

(1.119)

3

(2.237)

Motor

RPM

1550 668

1150 470

1550 1200 1190

1550 1360

1150 995

1070 1640

850 1290

1100 2180

1100 2360

1100 2920

1100 3390

1100 4500

1100 5040

1140 5700

1140 6600

1175 9380

1175 10,300

1165 11,900

Nominal

CFM (m

(.312)

(.219)

(.635)

(.464)

(.765)

(.602)

(1.017)

(1.101)

(1.363)

(1.582)

(2.100)

(2.352)

(2.660)

(3.080)

(4.377)

(4.807)

(5.553)

Outlet Velocity

3

/s)

FPM (m/s) Sound Rating

950

(4.826)

672

(3.414)

1350

(6.858)

992

(5.039)

1050

(5.334)

827

(4.201)

1390

(7.061)

1080

(5.486)

1340

(6.807)

1560

(7.925)

1270

(6.452)

1420

(7.214)

1610

(8.179)

1870

(9.500)

1860

(9.449)

2060

(10.465)

2380

(12.090)

I

I

II

II

III

III

IV

III

IV

IV

IV

IV

IV

IV

IV

E.D.R. = Equivalent Direct Radiation
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.
** Performance data based on 2 lbs. steam pressure at heater with air entering @60°F.
To determine BTU per hour capacities at various steam pressures and entering air temperatures, use conversion factors from Table 7. Final temperatures at new conditions can

be calculated by applying basic formula.

44 UH-SVX01A-EN

Steam Performance Data

Table 26. STEAM CALCULATIONS AND CORRECTION FACTORS P STYLE

I. CAPACITY

A. For 2 lbs. steam, 60° entering air

B. For higher steam pressures and/or E.A.T.'s above
or below 60°F

II. FINAL AIR TEMPERATURE

A. For 2 lbs. steam, 60° entering air

B. For capacities calculated in I.B. (above) Output from I.B./1.085 x CFM from Tab l e 2 4 +

III. FINAL AIR VOLUME

A. For 2 lbs. steam, 60° entering air

B. For final air temperatures calculated In II. B.
(above)

IV. CONDENSATE PER HOUR

A. For 2 lbs. steam, 60° entering air

B. For capacities calculated in I.B. (above) Output from I.B./Latent Heat From Tab l e 2 8 = lbs.

Read output directly from Tab l e 2 4 : 41,300 BTU/
HR.

Multiply output from Ta ble 2 4 by appropriate
correction factor from Tab l e 27.

Read temperature directly from Tab l e 24: 124°F.

E.A.T. = Final Air Temp

460 + Final Air Temp from Ta b l e 2 4 530 x Nom.
CFM from Tab l e 2 4 = Final Air Volume

460 + Final Air Temp from II.B./530 x Nom. CFM
from Table 2 4 = Final Air Volume

Read lbs. per hour from Tab l e 24: 43 LBS./HR.

per hour of condensate

EXAMPLE:

UNIT SIZE __________ 042
Steam Pressure _____10 PSI
Entering Air Temp. ____ 40°F

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

52,451/1.085 x 595 + 40 = 121.0°F

460 + 124/530 x 595 = 655 CFM

460 + 121.0/530 x 595 = 652 CFM

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

Table 27. STEAM CORRECTION FACTORS BASED ON 2 LBS. STEAM 60° E.A.T.

ENTERING

AIR TEMP

°F (°C)

30° (-1°) 1.18 1.22 1.27 1.34 1.40 1.45 1.53 1.61 1.67 1.79

40° (4°) 1.11 1.15 1.20 1.27 1.32 1.37 1.46 1.53 1.59 1.71

50° (10°) 1.03 1.07 1.12 1.19 1.25 1.30 1.39 1.46 1.52 1.64

60° (16°) 0.96 1.00 1.05 1.12 1.18 1.23 1.32 1.39 1.45 1.57

70° (21°) 0.90 0.93 0.98 1.05 1.11 1.16 1.25 1.32 1.38 1.49

80° (27°) 0.83 0.86 0.91 0.98 1.04 1.09 1.18 1.25 1.31 1.42

90° (32°) 0.76 0.80 0.85 0.91 0.97 1.02 1.11 1.18 1.24 1.36

100° (38°) 0.69 0.73 0.78 0.85 0.90 0.96 1.04 1.11 1.17 1.29

0

(.0)2(13.8)5(34.5)

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

10

(68.9)

15

(103.4)

20

(137.9)

30

(206.8)

40

(275.8)

50

(344.7)

75

(517.1)

Table 28. PROPERTIES OF SATURATED STEAM

STEAM PRESSURE IN LBS. PER SQUARE INCH GAUGE

0 (.0) 2 (13.8) 5 (34.5) 10 (68.9) 15 (103.4) 20 (137.9) 30 (206.8) 40 (275.8) 50 (344.7) 75 (517.1)

Steam Temperature-°F (°C) 212.0

Latent Heat of Steam-Btu/
lbm (KJ/Kg)

(100.0)

(2256)

970

218.5

(103.6)

966

(2247)

227.1

(108.4)

961

(2235)

239.4

(115.2)

953

(2217)

249.8

(121.0)

946

(2200)

258.8

(126.0)

940

(2186)

274.0

(134.4)

929

(2161)

286.7

(141.5)

920

(2140)

297.7

(147.6)

912

(2121)

319.9

(159.9)

891

(2072)

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

Note: For specific motor data refer to motor specifications in Ta b l e 16 and Ta b l e 1 7 .

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

example, 60° air is r equired at work area (5 ft. above ?oor) 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 Table 6 .

UH-SVX01A-EN 45

Hot Water Performance Data

Table 29. Model S Serpentine and Header Type

Unit Size

BTU/HR*

A08

A18

A25

A36

018

024

036

048

060

072

084

096

108 78,400

Output

(kW)

8,030

(2.4)

6,800

(2.0)

18,400

(5.4)

15,650

(4.6)

24,800

(7.3)

21,230

(6.2)

35,900

(10.5)

32,300

(9.5)

13,050

(3.8)

11,725

(3.4)

17,400

(5.1)

15,600

(4.6)

26,100

(7.6)

23,500

(6.9)

34,800

(10.2)

31,300

(9.2)

43,600

(12.8)

39,200

(11.5)

52,300

(15.3)

47,000

(13.8)

61,000

(17.9)

54,900

(16.1)

69,700

(20.4)

62,700

(18.4)

(23.0)

70,500

(20.7)

Flow Rate
GPM (L/s)

0.8

(.050)

1.9

(.120)

2.5

(.158)

3.6

(.227)

1.3

(.082)

1.8

(.114)

2.7

(.170)

3.5

(.221)

4.4

(.278)

5.3

(.334)

6.1

(.385)

7.0

(.442)

7.9

(.498)

Final Air

Deg. °F

(Deg. °C)

91

(33)

90

(32)

94

(34)

96

(36)

102

(39)

106

(41)

99

(37)

100

(38)

95

(35)

99

(37)

96

(36)

98

(37)

103

(39)

103

(39)

103

(39)

111

(44)

105

(41)

112

(44)

104

(40)

106

(41)

100

(38)

106

(41)

106

(41)

113

45

100

(38)

103

(39)

Prssr. Drop

FT./H2O

(m/water) Motor HP (kW) RPM

(.244)

(.671)

(.671)

(.914)

(.002)

(.004)

(.027)

(.037)

(.052)

(.070)

(.073)

(.088)

(.110)

0.80

2.20

2.20

3.00

0.005

0.014

0.09

0.12

0.17

0.23

0.24

0.29

0.36

16 Watts

16 Watts

25 Watts

1/20

(.037)

16 Watts

16 Watts

25 Watts

1/20

(.037)

1/20

(.037)

1/20

(.037)

1/12

(.062)

1/12

(.062)

1/12

(.062)

Nominal

CFM

(m3/s)

1550 245

1350 210

1550 500

1350 420

1550 580

1350 460

1000 850

1550 395

1350 350

1550 450

1350 380

1550 550

1350 480

1000 750

1000 900

1000 1100

1000 1400

1000 1400

1000 1800

(.116)

(.099)

(.236)

(.198)

(.274)

(.217)

(.401)

900 750

(.354)

(.186)

(.165)

(.212)

(.179)

(.260)

(.227)

(.354)

900 630

(.297)

(.425)

900 700

(.330)

(.519)

900 950

(.448)

(.661)

900 1100

(.519)

(.661)

900 1100

(.519)

(.850)

900 1500

(.708)

Outlet

FPM

(m/s)

250

(1.270)

215

(1.092)

500

(2.540)

420

(2.134)

590

(2.997)

450

(2.286)

550

(2.794)

480

(2.438)

395

(2.007)

350

(1.778)

450

(2.286)

380

(1.930)

550

(2.794)

480

(2.438)

550

(2.794)

460

(2.337)

650

(3.302)

510

(2.591)

800

(4.064)

700

(3.556)

900

(4.572)

750

(3.810)

930

(4.724)

800

(4.064)

1000

(5.080)

900

(4.572)

Nom.

Amps @

115VAC† Sound Rating

II

0.80

0.80

1.2

1.4

0.80

0.80

1.2

1.4

1.4

1.4

2.2

2.2

2.2

I

II

I

II

I

II

I

II

I

II

I

II

I

II

I

II

I

II

I

III

II

III

II

III

II

46 UH-SVX01A-EN

Hot Water Performance Data

Table 29. Model S Serpentine and Header Type (continued)

120 87,100

132 95,800

144 104,000

156 113,000

180 118,000

204 148,000

240 174,000

280 209,100

300 230,000

360 261,300

Performance based on 200°F (93°C) EWT, 60°F (16°C) E.A.T., 20°F (11°C)TD.
For Fan Diameter see Pages 41 and 42.

* For the lower output, an optional Speed Controller must be ordered.
†Stated AMP is full load for standard motors. AMP draw varies by motor manufacturer ± 0.2 AMPS. Please see your unit's motor data plate for exact (FLA) Full Load Amp rating.

(25.5)

(28.1)

(30.5)

(33.1)

(34.6)

(43.4)

(51.0)

(61.3)

(67.4)

(76.6)

8.8

(.555)

9.6

(.606)

10.4

(.656)

11.3

(.713)

11.8

(.744)

14.9

(.940)

17.4

(1.098)

21.0

(1.325)

23.0

(1.451)

26.2

(1.653)

102

(39)

104

(40)

104

(40)

100

(38)

110

(43)

107

(42)

106

(41)

106

(41)

102

(39)

103

(39)

0.39

(.119)

0.41

(.125)

0.43

(.131)

0.53

(.162)

0.6

(.183)

0.79

(.241)

1.06

(.323)

1.33

(.405)

2.1

(.640)

2.1

(.640)

1/3

(.249)

1/3

(.249)

1/3

(.249)

1/3

(.249)

1/3

(.249)

1/3

(.249)

1/3

(.249)

1/2

(.373)

1/2

(.373)

1/2

(.373)

1140 1900

1140 2000

1140 2200

1140 2600

1140 2200

1140 2900

1140 3500

1100 4200

1100 5000

1100 5500

(.897)

(.944)

(1.038)

(1.227)

(1.038)

(1.369)

(1.652)

(1.982)

(2.360)

(2.596)

900

(4.572)

950

(4.826)

1000

(5.080)

1150

(5.842)

800

(4.064)

1000

(5.080)

900

(4.572)

980

(4.978)

700

(3.556)

1000

(5.080)

4.5 III

4.5 IV

4.5 IV

4.5 IV

4.5 III

4.5 IV

4.5 IV

5.4 IV

5.4 IV

5.4 IV

Table 30. Hot Water Calculations and Correction Factors S Type

I. CAPACITY @ 20° TD:

A. For 200° EWT, 60° EAT

B. For EWT and/or EAT above or below
Standard

II. CAPACITY AT OTHER TD's

A. For TD's from 5 to 60°F

III. GPM AT OTHER TD's

A. For TD's from 5 to 60°F

IV. CAPACITY AT OTHER RATES OF
WATER FLOW

V. PRESSURE LOSS AT OTHER TD's

A. For TD's from 5 to 60°F

Read output directly from Tab l e 29, 17,400
BTU/HR (Ref., Std. 024)

Multiply output from Tab l e 2 9 by factor from

Table 3 1

Multiply output obtained in IA. Or IB. (above)
by appropriate factor from Table 3 2

Multiply GPM of unit for 20° TD, from

Table 2 9 by appropriate factor from Ta b l e 3 2

Multiply output from Tab l e 2 9 by factor from

Table 3 4 .

Multiply P.D. of unit for 20°TD, from Ta b le 29
by appropriate factor from the Table 3 2

EXAMPLE:
UNIT SIZE: __________________ 024
Entering Water Temp. _______ 160°F
Entering Air Temp. ___________ 40°F
Water Temperature Drop _______ 10°F

17,400 x .878 = 15,277 BTU/HR.

IA-17,400 x 1.15 = 20,010 BTU/HR.

-OR­IB-15,277 x 1.15 = 17,569 BTU/HR.

1.8 x 2.30 = 4.14 GPM (Applies only to units
with Std. 200° EWT, 60° EAT.) For all others
calculate using formula-GPM = BTU/500 x TD

.014 x 5.00 = .07 Ft. H

O

2

UH-SVX01A-EN 47

Hot Water Performance Data

Table 31. HOT WATER CONVERSION FACTORS BASED ON 200° (93°C) ENTERING WATER, 60° (16°C) ENTERING AIR
AND 20° (11°C) TEMPERATURE DROP

ENTERING

AIR

TEMPERAT

URE °F (°C)

30 -(1) 0.518 0.666 0.814 0.963 1.120 1.268 1.408 1.555 1.702 1.850 1.997

40 (4) 0.439 0.585 0.731 0.878 1.025 1.172 1.317 1.464 1.609 1.755 1.908

50 (10) 0.361 0.506 0.651 0.796 0.941 1.085 1.231 1.375 1.518 1.663 1.824

60 (16) 0.286 0.429 0.571 0.715 0.857 1.000 1.143 1.286 1.429 1.571 1.717

70 (21) 0.212 0.353 0.494 0.636 0.777 0.918 1.060 1.201 1.342 1.483 1.630

80 (27) 0.140 0.279 0.419 0.558 0.698 0.837 0.977 1.117 1.257 1.397 1.545

90 (32) 0.069 0.207 0.345 0.483 0.621 0.759 0.897 1.035 1.173 1.311 1.462

100 (38) 0.000 0.137 0.273 0.409 0.546 0.682 0.818 0.955 1.094 1.230 1.371

100°
(38)

120°

(49)

140°

(60)

Table 32. HOT WATER OUTPUT, FLOW RATE AND PRESSURE LOSS FACTORS BASED ON STANDARD CONDITIONS OF
200°F (93°C) ENTERING WATER, 60°F (16°C) ENTERING AIR & 20°F (11°C) WATER DROP

USE FACTORS FROM THIS TABLE TO OBTAIN

To obtain output for other Water Temperature Drops,
multiply basic output rating by applicable Factor.

To obtain flow for other Water Temperature Drops,
multiply basic rate rating by applicable Factor.*

To obtain Pressure Loss Feet (Meters) of Water for other
temperature Drops, multiply Basic loss at 20°F (11°C)
drop by Factor.

APPROXIMATE RESULTS

ENTERING WATER TEMPERATURE - °F (°C)

160°
(71)

180°

(82)

200°

(93)

5

(3)10(6)15(8)20(11)25(14)30(17)40(22)50(28)60(33)

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

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

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

220°

(104)

240°

(116)

TEMPERATURE DROP °F (°C)

260°

(127)

280°

(138)

300°

(149)

Table 33. MINIMUM WATER FLOW

MODEL No. A08 A18 A25 A36 18 24 36 48 60 72 84 96

MINIMUM GPM (L/s) 0.125

MODEL No. 108 120 132 144 156 180 204 240 280 300 360

MINIMUM GPM (L/s) 3.35

(.008)

(.211)

0.125

(.008)

3.60

(.227)

0.125
(.008)

4.09

(.258)

0.125

(.008)

4.09

(.258)

0.750

(.047)

4.09

(.258)

1.240

(.078)

4.34

(.274)

1.240

(.078)

4.34

(.274)

1.490
(.094)

4.59

(.290)

1.490

(.094)

4.59

(.290)

1.620

(.102)

6.08

(.384)

1.860

(.117)

6.08

(.384)

3.350
(.211)

Table 34. HEATING CAPACITY FACTORS FOR VARIOUS RATES OF WATER FLOW

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

Heating Capacity Factor .80 .89 .96 1.00 1.04 1.07 1.10

48 UH-SVX01A-EN

Table 35. P Type Standard Output Units**

Water
Temp.

Drop

Model No.

42

42*

64

64*

80

80*

102

102*

122

°F (°C)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

Output MBH

(kW)

28.8

(8.4)

22.7

(6.7)

16.7

(4.9)

22.9

(6.7)

18.1

(5.3)

13.4

(3.9)

48.1

(14.1)

39.6

(11.6)

31.1

(9.1)

38.1

(11.2)

31.5

(9.2)

24.8

(7.3)

58.7

(17.2)

48.4

(14.2)

38.1

(11.2)

46.5

(13.6)

38.5

(11.3)

30.5

(8.9)

77.2

(22.6)

68.3

(20.0)

59.3

(17.4)

63.7

(18.7)

56.5

(16.6)

49.2

(14.4)

94.9

(27.8)

83.7

(24.5)

72.5

(21.2)

Flow Rate

G.P.M. (L/s)

5.93

(.374)

2.34

(.148)

1.15

(.073)

4.71

(.297)

1.87

(.118)

.92

(.058)

9.92

(.626)

4.08

(.257)

2.14

(.135)

7.85

(.495)

3.24

(.204)

1.71

(.108)

12.11

(.764)

4.99

(.315)

2.62

(.165)

9.59

(.605)

3.97

(.250)

2.09

(.132)

15.91

(1.004)

7.03

(.443)

4.08

(.257)

13.13

(.828)

5.82

(.367)

3.38

(.213)

19.55

(1.233)

8.63

(.544)

4.98

(.314)

Hot Water Performance Data

Final

Press. Drop

ft/water

(m/water)

.37

(.113)

.06

(.018)

.02

(.006)

.24

(.073)

.04

(.012)

.01

(.003)

1.05

(.320)

.19

(.058)

.06

(.018)

.67

(.204)

.13

(.040)

.04

(.012)

.98

(.299)

.18

(.055)

.05

(.015)

.63

(.192)

.12

(.037)

.03

(.009)

2.06

(.628)

.44

(.134)

.16

(.049)

1.43

(.436)

.31

(.095)

.11

(.034)

3.04

(.927)

.65

(.198)

.23

(.070)

Air.

Temp.

°F (°C) Motor H.P. (kW) R.P.M.

104.6°

(40.3°)

95.2°

(35.1°)

85.9°

(29.9°)

108.3°

(42.4°)

98.3°

(36.8°)

88.4°

(31.3°)

104.8°

(40.4°)

96.9°

(36.1°)

89.0°

(31.7°)

109.7°

(43.2°)

101.1°

(38.4°)

92.4°

(33.6°)

105.1°

(40.6°)

97.2°

(36.2°)

89.3°

(31.8°)

110.0°

(43.3°)

101.2°

(38.4°)

92.7°

(33.7°)

106.6°

(41.4°)

101.2°

(38.4°)

95.8°

(35.4°)

108.6°

(42.6°)

103.1°

(39.5°)

97.6°

(36.4°)

108.9°

(42.7°)

103.1°

(39.5°)

97.3°

(36.3°)

1/40

(.019)

1/40

(.019)

1/20

(.037)

1/20

(.037)

1/20

(.037)

1/20

(.037)

1/8

(.093)

1/8

(.093)

1/6

(.124)

1550 595

1150 436

1550 989

1150 706

1550 1200

1150 858

1070 1528

850 1208

1100 1790

Nominal

CFM

3

(m

/s)

(.278)

(.203)

(.462)

(.329)

(.560)

(.400)

(.713)

(.564)

(.835)

Outlet

Velocity

FPM (m/s) Sound Rating

877

(4.455)

658

(3.343)

1005

(5.105)

727

(3.693)

1220

(6.198)

894

(4.542)

980

(4.978)

783

(3.978)

1170

(5.944)

I

I

II

II

II

II

II

II

III

UH-SVX01A-EN 49

Hot Water Performance Data

Table 35. P Type Standard Output Units** (continued)

Water

Model No.

146

166

202

252

280

336

384

500

600

Temp.

Drop

°F (°C)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

15°

(8.3°)

20°

(11.1°)

30°

(16.7°)

15°

(8.3°)

20°

(11.1°)

30°

(16.7°)

15°

(8.3°)

20°

(11.1°)

30°

(16.7°)

15°

(8.3°)

20°

(11.1°)

30°

(16.7°)

20°

(11.1°)

30°

(16.7°)

15°

(8.3°)

20°

(11.1°)

30°

(16.7°)

Output MBH

(kW)

117.6
(34.5)

105.2
(30.8)

92.8

(27.2)

132.4
(38.8)

118.6
(34.7)

104.8
(30.7)

156.2
(45.8)

139.7
(40.9)

123.2
(36.1)

188.9
(55.3)

180.1
(52.8)

162.7
(47.7)

215.4
(63.1)

205.4
(60.2)

185.3
(54.3)

254.9
(74.7)

242.9
(71.2)

218.9
(64.1)

294.7
(86.3)

280.8
(82.3)

253.1
(74.2)

368.1

(107.9)

333.6
(97.7)

451.2

(132.2)

431.1

(126.3)

391.0

(114.6)

Flow Rate

G.P.M. (L/s)

24.24

(1.529)

10.84

(.684)

6.38

(.402)

27.29

(1.722)

12.22

(.771)

7.20

(.454)

32.20

(2.031)

14.40

(.908)

8.47

(.534)

25.95

(1.637)

18.56

(1.171)

11.18

(.705)

29.60

(1.867)

21.17

(1.335)

12.73

(.803)

35.03

(2.210)

25.03

(1.579)

15.04

(.949)

40.49

(2.554)

28.94

(1.826)

17.39

(1.097)

37.93

(2.393)

22.92

(1.446)

62.00

(3.911)

44.43

(2.803)

26.86

(1.694)

Press. Drop

ft/water

(m/water)

4.32

(1.318)

.96

(.293)

.36

(.110)

3.67

(1.119)

.81

(.247)

.30

(.092)

5.02

(1.531)

1.11

(.339)

.41

(.125)

3.92

(1.196)

2.10

(.641)

.82

(.250)

5.02

(1.531)

2.68

(.817)

1.04

(.317)

6.88

(2.098)

3.67

(1.119)

1.42

(.433)

6.60

(2.013)

3.52

(1.074)

1.36

(.415)

5.81

(1.772)

2.29

(.698)

8.78

(2.678)

4.72

(1.440)

1.86

(.567)

Final

Air.

Temp.

°F (°C) Motor H.P. (kW) R.P.M.

108.8°

(42.7°)

103.7°

(39.8°)

98.5°

(36.9°)

106.6°

(41.4°)

101.7°

(38.7°)

96.9°

(36.1°)

105.0°

(40.6°)

100.2°

(37.9°)

95.5°

(35.3°)

101.8°

(38.8°)

99.9°

(37.7°)

96.0°

(35.6°)

104.8°

(40.4°)

102.7°

(39.3°)

98.5°

(36.9°)

105.1°

(40.6°)

103.0°

(39.4°)

98.7°

(37.1°)

104.2°

(40.1°)

102.2°

(39.0°)

98.0°

(36.7°)

102.3°

(39.1°) 1-1/2

98.3°

(36.8°)

104.0°

(40.0°)

102.0°

(38.9°)

98.1°

(36.7°)

1/6

(.124)

1/6

(.124)

1/4

(.186)

1/4

(.186)

1/2

(.373)

3/4

(.559)

3/4

(.559)

(1.119)

1-1/2

(1.119)

1100 2220

1100 2620

1100 3200

1100 4162

1100 4430

1140 5210

1140 6140

1160 8020

1160 9450

Nominal

CFM

(m3/s)

(1.036)

(1.223)

(1.493)

(1.942)

(2.067)

(2.431)

(2.865)

(3.743)

(4.410)

Outlet

Velocity

FPM (m/s) Sound Rating

1045

(5.309)

1230

(6.248)

1495

(7.595)

1205

(6.121)

1275

(6.477)

1500

(7.620)

1770

(8.992)

1640

(8.331)

1930

(9.804)

III

IV

III

IV

IV

IV

IV

IV

IV

50 UH-SVX01A-EN

Hot Water Performance Data

Table 35. P Type Standard Output Units** (continued)

Water
Temp.

Drop

20°

(11.1°)

30°

(16.7°)

Output MBH

(kW)

519.4

(152.2)

470.9

(138.0)

Model No.

**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 the

tables on page 17.

*Speed controller option is required for reduced ratings.

°F (°C)

720

Flow Rate

G.P.M. (L/s)

53.52

(3.376)

32.35

(2.041)

Press. Drop

ft/water

(m/water)

5.29

(1.613)

2.08

(.634)

Table 36. Low Output Units Standard Vertical Unit with All Air Ports Open**

Water

Model No.

42L

42L*

64L

64L*

80L

80L*

102L

Temp.

Drop

°F (°C)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

Output MBH

(kW)

23.9

(7.0)

18.9

(5.5)

14.0

(4.1)

16.7

(4.9)

13.5

(4.0)

41.5

(12.2)

34.2

(10.0)

27.0

(7.9)

32.4

(9.5)

26.9

(7.9)

21.3

(6.2)

48.9

(14.3)

40.5

(11.9)

32.0

(9.4)

38.5

(11.3)

32.0

(9.4)

25.4

(7.4)

63.7

(18.7)

56.5

(16.6)

49.2

(14.4)

Flow Rate

G.P.M. (L/s)

4.92

(.310)

1.95

(.123)

.96

(.061)

3.45

(.218)

1.39

(.088)

8.56

(.540)

3.53

(.223)

1.85

(.117)

6.68

(.421)

2.77

(.175)

1.46

(.092)

10.09

(.637)

4.17

(.263)

2.20

(.139)

7.94

(.501)

3.29

(.208)

1.75

(.110)

13.13

(.828)

5.82

(.367)

3.38

(.213)

Press. Drop

ft/water
m/water

.26

(.079)

.04

(.012)

.01

(.003)

.13

(.040).

02

(.006)

.80

(.244)

.15

(.046)

.04

(.012)

.50

(.153)

.09

(.027)

.03

(.009)

.69

(.210)

.13

(.040)

.04

(.012)

.44

(.134)

.08

(.024)

.02

(.006)

1.43

(.463)

.31

(.095)

.11

(.034)

Final

Air.

Temp.

°F (°C) Motor H.P. (kW) R.P.M.

103.5°

(39.7°) 3

99.5°

(37.5°)

Final

Air.

Temp.

°F (°C) Motor H.P. (kW) R.P.M.

92.9°

(33.8°)

86.1°

(30.1°)

79.3°

(26.3°)

92.8°

(33.8°)

86.4°

(30.2°)

91.9°

(33.3°)

86.3°

(30.2°)

80.7°

(27.1°)

94.7°

(34.8°)

88.7°

(31.5°)

82.8°

(28.2°)

93.2°

(34.0°)

87.4°

(30.8°)

81.7°

(27.6°)

95.7°

(35.4°)

89.6°

(32.0°)

83.5°

(28.6°)

93.5°

(34.2°)

89.7°

(32.1°)

85.9°

(29.9°)

(2.237) 1165

1/40

(.019)

1/40

(.019)

1/20

(.037)

1/20

(.037)

1/20

(.037)

1/20

(.037)

1/8

(.093)

1550 668

1150 470

1550 1200

1150 862

1550 1360

1150 995

1070 1752

Nominal

CFM

(m3/s)

11,000

(5.133)

Nominal

CFM

3

/s)

(m

(.312)

(.219)

(.560)

(.402)

(.635)

(.464)

(.818)

Outlet

Velocity

FPM (m/s) Sound Rating

2250

(11.430) IV

Outlet

Velocity

FPM (m/s) Sound Rating

950

(4.826)

672

(3.414)

1190

(6.045)

858

(4.359)

1350

(6.858)

992

(5.039)

1050

(5.334)

I

I

II

II

II

II

II

UH-SVX01A-EN 51

Hot Water Performance Data

Table 36. Low Output Units Standard Vertical Unit with All Air Ports Open** (continued)

Model No.

102L*

122L

146L

166L

202L

252L

280L

336L

384L

Water
Temp.

Drop

°F (°C)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

10°

(5.6°)

20°

(11.1°)

30°

(16.7°)

Output MBH

(kW)

54.5

(16.0)

48.5

(14.2)

42.4

(12.4)

83.7

(24.5)

73.9

(21.7)

64.2

(18.8)

95.4

(28.0)

85.5

(25.1)

75.6

(22.2)

112.3

(32.9)

100.7

(29.5)

89.2

(26.1)

135.8

(39.8)

121.8

(35.7)

107.3

(31.4)

168.5

(49.4)

153.8

(45.1)

139.1

(40.8)

188.9

(55.3)

180.1

(52.8)

162.7

(47.7)

220.9

(64.7)

210.6

(61.7)

189.9

(55.6)

260.7

(76.4)

248.5

(72.8)

224.2

(65.7)

Flow Rate

G.P.M. (L/s)

11.24

(.709)

4.99

(.315)

2.91

(.184)

17.24

(1.088)

7.62

(.481)

4.41

(.278)

19.66

(1.240)

8.81

(.556)

5.20

(.328)

23.15

(1.460)

10.38

(.655)

6.13

(.387)

27.98

(1.765)

12.52

(.790)

7.37

(.465)

34.72

(2.190)

15.85

(1.000)

9.56

(.603)

25.95

(1.637)

18.56

(1.171)

11.18

(.705)

30.35

(1.915)

21.70

(1.369)

13.05

(.823)

35.82

(2.260)

25.61

(1.616)

15.40

(.971)

Press. Drop

ft/water
m/water

1.06

(.323)

.23

(.070)

.08

(.024)

2.40

(.732)

.51

(.156)

.18

(.055)

2.92

(.891)

.65

(.198)

.24

(.073)

2.70

(.824)

.60

(.183)

.22

(.067)

3.85

(1.174)

.85

(.259)

.32

(.098)

6.75

(2.059)

1.56

(.476)

.61

(.186)

3.92

(1.196)

2.10

(.641)

.82

(.250)

5.26

(1.604)

2.81

(.857)

1.09

(.332)

5.24

(1.598)

2.80

(.854)

1.09

(.332)

Final

Air.

Temp.

°F (°C) Motor H.P. (kW) R.P.M.

93.5°

(34.2°)

89.8°

(32.1°)

86.1°

(30.1°)

95.4°

(35.2°)

91.3°

(32.9°)

87.1°

(30.6°)

97.3°

(36.3)

93.4°

(34.1)

89.5°

(31.9)

95.4°

(35.2)

91.8°

(33.2)

88.1°

(31.2)

96.9°

(36.1)

93.0°

(33.9)

89.2°

(31.8)

94.5°

(34.7)

91.4°

(33.0)

88.4°

(31.3)

94.5°

(34.7)

92.9°

(33.8)

89.7°

(32.1)

95.7°

(35.4)

94.1°

(34.5)

90.7°

(32.6)

96.4°

(35.8)

94.7°

(34.8)

91.3°

(32.9)

1/8

(.093)

1/6

(.124)

1/6

(.124)

1/6

(.124)

1/4

(.186)

1/4

(.186)

1/2

(.373)

3/4

(.559)

3/4

(.559)

Nominal

CFM

(m3/s)

850 1499

(.700)

1100 2180

(1.017)

1100 2360

(1.101)

1100 2920

(1.363)

1100 3390

(1.582)

1100 4507

(2.103)

1100 5040

(2.352)

1140 5700

(2.660)

1140 6600

(3.080)

Outlet

Velocity

FPM (m/s) Sound Rating

827

(4.201)

1390

(7.061)

1080

(5.486)

1340

(6.807)

1560

(7.925)

1270

(6.452)

1420

(7.214)

1610

(8.179)

1870

(9.500)

II

III

III

IV

III

IV

IV

IV

IV

52 UH-SVX01A-EN

Hot Water Performance Data

Table 36. Low Output Units Standard Vertical Unit with All Air Ports Open** (continued)

Water
Temp.

Drop

20°

30°

10°

(5.6°)

20°

30°

20°

30°

Output MBH

(kW)

310.5

(91.0)

281.7

(82.5)

394.4

(115.6)

377.0

(110.5)

342.2

(100.3)

453.7

(132.9)

411.7

(120.6)

Model No.

500L

600L

720L

**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 the

tables on page 17.

*Speed controller option is required for reduced ratings.

°F (°C)

(11.1°)

(16.7°)

(11.1°)

(16.7°)

(11.1°)

(16.7°)

Flow Rate

G.P.M. (L/s)

32.00

(2.019)

19.35

(1.221)

54.19

(3.418)

38.85

(2.451)

23.51

(1.483)

46.76

(2.950)

28.28

(1.784)

Press. Drop

ft/water
m/water

4.23

(1.290)

1.67

(.509)

6.83

(2.083)

3.68

(1.122)

1.45

(.442)

4.11

(1.254)

1.62

(.494)

Final

Air.

Temp.

°F (°C) Motor H.P. (kW) R.P.M.

90.5°

(32.5) 1-1/2

87.7°

(30.9)

95.3°

(35.2)

93.7°

(34.3)

90.6°

(32.6)

95.1°

(35.1) 3

91.9°

(33.3)

(1.119)

1-1/2

(1.119)

(2.237)

1160 9380

1160 10,300

1165 11,900

Nominal

CFM

(m3/s)

(4.377)

(4.807)

(5.553)

Outlet

Velocity

FPM (m/s) Sound Rating

1860

(9.449)

2060

(10.465)

2380

(12.090)

IV

IV

IV

Table 37. HOT WATER CALCULATIONS AND CORRECTION FACTOR P STYLE

I. CAPACITY @ 20° TD:

A. For 200° EWT, 60° EAT

B. For EWT and/or EAT above or below
Standard

II. CAPACITY AT OTHER TD's

A. For TD's from 5 to 60°F

III. GPM AT OTHER TD's

A. For TD's from 5 to 60°F

IV. PRESSURE LOSS AT OTHER TD's

A.ForTD's from 5 to 60°F

Read output directly from Tab l e 3 5 & Ta b l e 3 6,
22,700 BTU/HR (Ref., Std. 042, p. 12).

Multiply output from Ta ble 3 5 & Ta b l e 3 6 by factor from

Table 3 8 .

Multiply output obtained in IA. or IB.
(above) by appropriate factor from Tab l e 3 9

Multiply GPM of unit for 20° TD, from Tab l e 3 5 & Table 3 6
by appropriate factor from Tabl e 3 9

Multiply P.D. of unit for 20° TD, from Table 3 5 & Ta b l e 3 6
by appropriate factor from Tabl e 3 9

EXAMPLE:

UNIT SIZE _________________042
Entering Water Temp. _____160°F
Entering Air Temp. ________ 40°F
Water Temperature Drop ____ 10°F

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

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

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

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

.06 x 5.00 = .30 Ft. H

O

2

UH-SVX01A-EN 53

Hot Water Performance Data

Table 38. HOT WATER CONVERSION FACTORS BASED ON 200° ENTERING WATER 60° ENTERING AIR 20° TEMPERATURE DROP

ENTERING AIR
TEMPERATURE

°F (°C)

30° (-1) 0.518 0.666 0.814 0.963 1.120 1.268 1.408 1.555 1.702 1.850 1.997

40° (4) 0.439 0.585 0.731 0.878 1.025 1.172 1.317 1.464 1.609 1.755 1.908

50° (10) 0.361 0.506 0.651 0.796 0.941 1.085 1.231 1.375 1.518 1.663 1.824

60° (16) 0.286 0.429 0.571 0.715 0.857 1.000 1.143 1.286 1.429 1.571 1.717

70° (21) 0.212 0.353 0.494 0.636 0.777 0.918 1.060 1.201 1.342 1.483 1.630

80° (27) 0.140 0.279 0.419 0.558 0.698 0.837 0.977 1.117 1.257 1.397 1.545

90° (32) 0.069 0.207 0.345 0.483 0.621 0.759 0.897 1.035 1.173 1.311 1.462

100° (38) 0 0.137 0.273 0.409 0.546 0.682 0.818 0.955 1.094 1.230 1.371

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 the above tables.

100°

(38°)

120°

(49°)

Table 39. 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

To obtain BTU for other Water Temperature Drops,
multiply basic BTU rating by applicable Factor.

To obtain GPM for other Water Temperature Drops,
multiply basic GPM rating by applicable Factor.*

To obtain Pressure Loss Feet of Water for other
temperature Drops, multiply Basic loss at 20° drop by
Fact or.

APPROXIMATE RESULTS

ENTERING WATER TEMPERATURE -20° WATER TEMPERATURE DROP

140°

(60°)

160°

(71°)

5 (3) 10 (6) 15 (8) 20 (11) 25 (14) 30 (17) 40 (22) 50 (28) 60 (33)

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

180°

(82°)

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

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

200°

(93°)

220°

(104°)

TEMPERATURE DROP °F (°C)

240°

(116°)

260°

(127°)

280°

(138°)

300°

(149°)

Table 40. *MINIMUM WATER FLOW - GPM

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

MIN. GPM (L/s) .55

(.035)

.55

(.035)

.55

(.035)

.55

(.035)

.82

(.052)

.82

(.052)

1.10

(.069)

1.10

(.069)

1.10

(.069)

1.10

(.069)

Table 41. *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

54 UH-SVX01A-EN

Maintenance

Periodic Service

WARNING

Hazardous Voltage

Open all disconnect switches and
secure in that position before
servicing unit. Failure to do so may
result in personal injury or death
from electrical shock.

CAUTION

Rotating Components

Allow rotating fans to stop before
servicing to avoid serious injury to
fingers and hands.

Because of the simple design of the
steam and hot water unit heaters,
they are nearly maintenance free.
However, depending on the
environment, simple maintenance
practices should be adopted.

Periodically check the finned
surfaces and vacuum these as often
as necessary to remove any
accumulation of lint and dirt. Check
fan blades and remove dirt
accumulation. If fan blades are not
cleaned they tend to become
unbalanced.

Most of the motors supplied on the
unit heaters have either ball bearings
or sleeve bearings and should not
require lubrication for long periods
of time. It is however advisable that
motor maintenance and lubrication
recommended by the motor
manufacturer be followed.

Check motors for dirt and dust
accumulation, and remove any
accumulation as often as necessary.
Open type motors may overheat if
the dirt or dust is not removed from
ventilation openings.

Motor Lubrication

Sleeve Bearings

Motors with oilers or oil holes are
lubricated before shipment with a
good grade of electric motor oil.
Refill when necessary, with the
motor at a stand-still, until oil
reaches the proper level.

Use SAE 20W non detergent oil for
motors operatingin ambient
temperatures of 32°F to 100°F (0°C to

38°C). Below 32°F (0°C), SAE 10W
non detergent oil will be required.

The frequency of oiling will depend
upon operating conditions and
length of running time. Inspect the
oilers or oil holes when cleaning the
unit. If the unit has a fractional
horse-power motor, lubricate at least
once a year. Under high ambient
conditions or constant fan operation,
fractional horse-power motors
should be lubricated every 90 days.
On those motors without oilers or oil
holes, follow the instructions given
on the motor nameplate.

Ball Bearings

Ball bearing motors are pre­lubricated and normally not
equipped with grease fittings.
However, motors are equipped with
removable grease plugs to allow
installation of grease fittings if
desired by owner. Motor
manufacturers do not recommend or
require on the job lubrication of ball
bearing motors.

If on the job lubrication is required
by the owner, use the following
procedure: With the motor at a
stand-still, remove the vent and
grease plugs. Install grease fitting
and add grease sparingly. Remove
the old grease from the vent relief
chamber. Operate the motor a few
minutes before reinstalling the vent
plug to allow excess grease to
escape. If there is evidence of grease
working out around the motor shaft,
less grease should be added and the
greasing periods lengthened. If
grease continues to appear, take the
motor to the motor manufacturer’s
authorized service station for repair.

Note: Consult local motor

manufacturer’s service
facility for information on
type of grease and oil to be
used.

Note: The heater system should be

checked once a year by a
qualified technician. All
maintenance/service
information should be
recorded accordingly on the

inspection sheet provided in
this manual.

Should maintenance be required,
perform the following inspection and
service routine:

Inspect the area near the unit to be
sure that there is no combustible
material located within the minimum
clearance requirements listed in this
manual.

Cleaning the Unit

The unit casing, fan, diffuser and coil
should be cleaned thoroughly once a
year. Coil heat transfer efficiency
depends on cleanliness. The
following recommended procedures
may be performed when lubricating
the motor and cleaning the coil.

1. Wipe all excess lubricant from
the motor, fan and casing. Clean
the motor thoroughly. A dirty
motor will run hot and
eventually cause internal
damage.

2. Clean the coil:
a. Loosen the dirt with a brush

on the fan side of the coil.
Operate the motor allowing
the fan to blow the loosened
dirt through the unit.

b. Use high pressure air or

steam on the side of the coil
away from the fan.

Note: A piece of cheesecloth or

a burlap bag may be
used to collect the large
particles during the
cleaning process.

3. Clean the casing, fan blades, fan
guard and diffuser using a damp
cloth. Any rust spots on the
casing should be cleaned and
repainted.

4. Tighten the fan guard, motor
frame and fan bolts. Check the
fan for clearance in the panel
orifice and free rotation.

UH-SVX01A-EN 55

Maintenance

Table 42. Troubleshooting Guide

Symptoms Possible Cause(s) Corrective Action

A. Leaking coil 1. Frozen coil.

B. Poor output on steam 1. Check for air in coil.

C. Poor output on steam or hot water 1. No circulation of water through coil.

D. Noisy or vibrating unit 1. Damaged fan blade.

2. Defective coil.

3. Corrosion.

4. Leak in joint.

2. Lint on coil fins

2. Short cycling of motor.

3. Backward rotating motor.

2. Dirty fan blade.

Table 43. Unit Equipment Start-Up

Customer____________________________________________ Job Name & Number___________________________________

Pre-Inspection Information (with power off)

Type of equipment: Unit Heater

Serial Number________________________________________ Model Number________________________________________

Name Plate Voltage___________________________________ Name Plate Amperage_________________________________

Steam______________________________________________ Hotwater____________________________________________

1. Replace.

2. Replace.

3. Replace

4. Braze joint if joint is exposed where leak has
occurred.

1. Repair or replace thermostatic air vent.

2. Clean coil and fins. Check filter and clean.

1. Check circulation pump. Check for blocked tubes.

2. Check voltage and correct. Check for linted coil and
clean. Check for defective overload and repair or replace
motor.

3. On single phase motor replace motor. On three phase
motor, reverse two leads to change rotation.

1. Change fan blade.

2. Clean fan blade.

Questions/Checklist

Are all panels in place?

Has the unit suffered any external damage? If so, what:____________________________________________________________

Does the piping and electric wiring appear to be installed in a professional manner?

Has the piping and electric been inspected by the local authority having jurisdiction?

Is the supply properly sized for the equipment?

Were the installation instructions followed when the equipment was installed?

Have all field installed controls been installed?

Do you understand all the controls on this equipment?

the four panel mounting bolts. See

Additional "P" Model

Figure 58.

Instructions

Fan and Motor Assembly

For cleaning or maintenance
purposes, the fan and motor
assembly may be removed easily
from the Unit Heater. The motor is
attached to the fan guard which is, in
turn, mounted to the top or back
panel of the unit as shown in

Figure 58.

On Vertical Units, reach up through
the fan and remove the fan guard
mounting screws. Lower the motor,
fan and fan guard assembly down
through the fan outlet. If desired, the
top and bottom panels may be
removed from the coil by taking out

Top
Panel

Bottom
Panel

Figure 58. Cross Section View

Fan Guard
Mounting Screws

Panel Mounting
Bolts

56 UH-SVX01A-EN

Warranty Info

LIMITED WARRANTY: S
Model

HORIZONTAL STEAM & HOT
WATER UNIT HEATERS

The Manufacturer warrants to the
original owner at the original
installation site that the Horizontal
Steam and Hot Water Unit Heaters
(the “Product”) will be free from
defects in material and workmanship
for a period not to exceed one (1)
year from startup or eighteen (18)
months from date of shipment from
the factory, whichever occurs first. If
upon examination by the
Manufacturer the Product is shown
to have a defect in material or
workmanship during the warranty
period, the Manufacturer will repair
or replace, at its option, that part of
the Product which is shown to be
defective.

This limited warranty does not apply:

a. if the Product has been

subjected to misuse or
neglect, has been
accidentally or intentionally
damaged, has not been
installed, maintained or
operated in accordance with
the furnished written
instructions, or has been
altered or modified in any
way.

b. to any expenses, including

labor or material, incurred
during removal or
reinstallation of the defective
Product or parts thereof.

c. to any workmanship of the

installer of the Product.

This limited warranty is conditional
upon:

a. shipment, to the

Manufacturer, of that part of
the Product thought to be
defective. Goods can only be
returned with prior written
approval from the
Manufacturer. All returns
must be freight prepaid.

b. determination, in the

reasonable opinion of the
Manufacturer, that there

exists a defect in material or
workmanship.

Repair or replacement of any part
under this Limited Warranty shall not
extend the duration of the warranty
with respect to such repaired or
replaced part beyond the stated
warranty period.

THIS LIMITED WARRANTY IS IN
LIEU OF ALL OTHER WARRANTIES,
EITHER EXPRESS OR IMPLIED, AND
ALL SUCH OTHER WARRANTIES,
INCLUDING WITHOUT LIMITATION
IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE, ARE
HEREBY DISCLAIMED AND
EXCLUDED FROM THIS LIMITED
WARRANTY. IN NO EVENT SHALL
THE MANUFACTURER BE LIABLE IN
ANY WAY FOR ANY
CONSEQUENTIAL, SPECIAL, OR
INCIDENTAL DAMAGES OF ANY
NATURE WHATSOEVER, OR FOR
ANY AMOUNTS IN EXCESS OF THE
SELLING PRICE OF THE PRODUCT
OR ANY PARTS THEREOF FOUND
TO BE DEFECTIVE. THIS LIMITED
WARRANTY GIVES THE ORIGINAL
OWNER OF THE PRODUCT SPECIFIC
LEGAL RIGHTS. YOU MAY ALSO
HAVE OTHER RIGHTS WHICH MAY
VARY BY EACH JURISDICTION.

LIMITED WARRANTY: P
Model

VERTICAL STEAM & HOT WATER
UNIT HEATERS

The Manufacturer warrants to the
original owner at the original
installation site that the Vertical
Steam and Hot Water Unit Heaters
(the “Product”) will be free from
defects in material and workmanship
for a period not to exceed one (1)
year from startup or eighteen (18)
months from date of shipment from
the factory, whichever occurs first. If
upon examination by the
Manufacturer the Product is shown
to have a defect in material or
workmanship during the warranty
period, the Manufacturer will repair
or replace, at its option, that part of
the Product which is shown to be
defective.

This limited warranty does not apply:

a. if the Product has been

subjected to misuse or
neglect, has been
accidentally or intentionally
damaged, has not been
installed, maintained or
operated in accordance with
the furnished written
instructions, or has been
altered or modified in any
way.

b. to any expenses, including

labor or material, incurred
during removal or
reinstallation of the defective
Product or parts thereof.

c. to any workmanship of the

installer of the Product.

This limited warranty is conditional
upon:

a. shipment, to the

Manufacturer, of that part of
the Product thought to be
defective. Goods can only be
returned with prior written
approval from the
Manufacturer. All returns
must be freight prepaid.

b. determination, in the

reasonable opinion of the
Manufacturer, that there
exists a defect in material or
workmanship.

Repair or replacement of any part
under this Limited Warranty shall not
extend the duration of the warranty
with respect to such repaired or
replaced part beyond the stated
warranty period.

THIS LIMITED WARRANTY IS IN
LIEU OF ALL OTHER WARRANTIES,
EITHER EXPRESS OR IMPLIED, AND
ALL SUCH OTHER WARRANTIES,
INCLUDING WITHOUT LIMITATION
IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE, ARE
HEREBY DISCLAIMED AND
EXCLUDED FROM THIS LIMITED
WARRANTY. IN NO EVENT SHALL
THE MANUFACTURER BE LIABLE IN
ANY WAY FOR ANY
CONSEQUENTIAL, SPECIAL, OR
INCIDENTAL DAMAGES OF ANY
NATURE WHATSOEVER, OR FOR
ANY AMOUNTS IN EXCESS OF THE

UH-SVX01A-EN 57

SELLING PRICE OF THE PRODUCT
OR ANY PARTS THEREOF FOUND TO
BE DEFECTIVE. THIS LIMITED
WARRANTY GIVES THE ORIGINAL
OWNER OF THE PRODUCT SPECIFIC
LEGAL RIGHTS. YOU MAY ALSO
HAVE OTHER RIGHTS WHICH MAY
VARY BY EACH JURISDICTION.

Warranty Info

58 UH-SVX01A-EN

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 [e-mail]

Literature Order Number UH-SVX01A-EN

Date 05/07

Supersedes UH-IM-2F (09/99)

Trane has a policy of continuous product and product data improvement and reserves the right to
change design and specifications without notice.