STERLING 20 Horizontal and Vertical Steam Hot Water Unit Heaters Instruction Manual

: September 11, 2024
: STERLING

Table of Contents

STERLING 20 Horizontal and Vertical Steam Hot Water Unit Heaters
Product Information
Product Usage Instructions
Application of Unit Heaters
Horizontal Unit Heaters Construction and Features
Serpentine Coil Horizontal Unit Heaters Dimensional Data
Horizontal Unit Heaters Motor Characteristics
Vertical Unit Heaters Features and General Specifications
Horizontal and Vertical Unit Heater
Wiring Diagrams
Warranty
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

STERLING 20 Horizontal and Vertical Steam Hot Water Unit Heaters

Product Information

Specifications

Model: HCV-20
Type: Hydronic Heating Equipment
Application: Horizontal and Vertical Steam/Hot Water Unit Heaters
Motor: 115 volt, single speed standard motors
Steam Pressure Control: SPST switch with a range of 0 to 15 PSIG
Manual Starters: Single and three-phase models available

Product Usage Instructions

Application of Unit Heaters
The proper choice and placement of a unit heater with regard to building type and application are crucial. Consider heat loss, CFM, air temperature, and location of units when designing a job.

Horizontal Unit Heaters
Horizontal unit heaters are available in various outputs and airflows for design flexibility. Consider the building’s construction and planned usage for optimal placement.

Steam Performance Data
Refer to the provided steam performance data for accurate information on steam output.

Hot Water Performance Data
Consult the hot water performance data for details on hot water output.

Mounting Heights and Throws
Ensure proper mounting heights and throws based on the dimensional data provided.

Piping and Installation
Follow the guidelines for piping and installation as outlined in the manual to ensure proper functioning of the unit heaters.

FAQ

Q: Can the unit heaters be used with explosion-proof motors?
A: Yes, most sizes can be supplied with single-phase explosion-proof motors. Refer to page 13 for availability of motors in different configurations.

Q: Are vertical louvers included with the unit heaters?
A: Vertical louvers are optional accessories that can be installed on built-to-order units or shipped loose for field installation.

Application of Unit Heaters

The proper choice and placement of a unit heater with regard to building type (architecturally) and application (area use) are two criteria, the importance of which cannot be overemphasized.
The first step in the design of a job is typically to determine the heat loss before considering CFM, final air temperature and quantity and location of units. ASHRAE and others publish the basic methodology used in calculating the building or area’s heat loss.

Two requirements which not only affect the heat loss calculation but every other step of the job as well, are a detailed knowledge of the building’s construction and its planned usage. The number of people, types of equipment and daily activities therein should be a strong guiding factor in the overall design.

Horizontal steam/hot water unit heaters are available in a range of outputs and airflows allowing almost unlimited flexibility in job design.
The following points offer some basic guidelines and suggestions which will be helpful in designing any job using horizontal steam/hot water unit heaters:

Always direct airflow to areas of greatest heat loss.
Adjust throw length with horizontal louvers.
Use horizontal and vertical louvers for complete directional control of airflow.
Mount units at the lowest practical and allowable level.
Select lower CFM models for lower mounting heights and heavily occupied areas.
The higher a unit must be located, the more CFM is required to get the heat down to the occupied zone.
More, smaller units will provide better heat distribution than fewer larger ones.
Watch final air temperatures on units mounted at lower levels or in heavily occupied areas to insure that air is warm enough to avoid drafts being felt.
On motors with variable speed control use lower CFM rating for design base.
Watch sound ratings.

Horizontal Unit Heaters Construction and Features

MOTORS
115 volt, single speed motors are standard. Most sizes can be supplied with single phase, explosion proof motors. For standard motors in 230 volt or three-phase configuration, and three-phase explosion-proof motors, see page 13 for availability.

FAN GUARDS
All sizes with standard (non-explosion-proof) single phase 115 or 230 volt motors utilize a wire fan guard as a motor mount. OSHA type fan guards are standard on all serpentine coil models and header type sizes 18 through 48 equipped with single phase, standard motors only. On header type sizes 60 through 360, OSHA type fan guards can be added as an optional accessory when equipped with a single phase, standard motor only. Horizontal unit heaters with OSHA fan guards can be installed in residential applications. All sizes with three-phase or explosion-proof motors are shelf-mounted and standard fan guards can be added as an optional accessory.

HORIZONTAL AND VERTICAL LOUVERS
Horizontal louvers are standard on all sizes. Vertical louvers are an optional accessory on all sizes. 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 bi-metal thermometer, set point adjustment, 40 to 90°F (5 to 30°C) range and selector switches. Standard duty models with “off-auto” and “auto-off-fan” and a heavy duty model with “auto-off-fan” switching are available. Other models available on request.

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 120 volt is also available. Control can be used for direct or reverse acting applications as a high or low limit.

STEAM PRESSURE CONTROL
SPST switch opens on a rise in pressure. Control is automati-cally reset, has a range of 0 to 15 PSIG (0 to 103 KPa) and has an adjustable differential. Other actions, ranges, circuits and manual reset models are available on request.

MANUAL STARTERS
Single and three-phase models are available. Standard models are single-speed, toggle-operated, NEMA Type 1 and are surface-mounted. Note: While these manual starters can be used with explosion-proof motors, they do not meet requirements for use in explosion-proof applications.

WALL MOUNTED SPEED CONTROLLERS
Horizontal units up to size 108 and vertical units up to size 104 with standard motors (115 volt) 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 230 volt motors operate only at rated speed and CFM – See performance data charts.

Steam Performance Data — Table 1
Performance based on 2 Lbs steam pressure at heater with air entering @ 60°F. Maximum Working Pressure 150 PSI, 366°F**

Unit Size

| ****

Output BTU Per **Hour***

| ****

Condensate Lbs Per Hour

| ****

Square Foot EDR

| ****

Final Air Temp

| ****

Motor HP ‡

| ****

Motor RPM

| ****

Nominal CFM

| ****

Outlet FPM

| Nominal Amps

at

115 VAC†

| ****

Nominal Fan Diameter

---|---|---|---|---|---|---|---|---|---|---
18| 18,000| 18.0| 75| 102°F| 16 Watt| 1550| 395| 395| .80| 9″
16,200| 16.2| 68| 105°F| 1350| 330| 330| .80| 9″
24| 24,000| 24.5| 100| 109°F| 16 Watt| 1550| 450| 450| .80| 10″
21,600| 22.0| 90| 112°F| 1350| 380| 380| .80| 10″
36| 36,000| 37.0| 150| 119°F| 25 Watt| 1550| 550| 550| 1.2| 10″
32,400| 33.0| 135| 120°F| 1350| 480| 480| 1.2| 10″
48| 48,000| 49.0| 200| 119°F| 1/20| 1000| 750| 550| 1.4| 12″
43,200| 44.0| 180| 123°F| 900| 630| 460| 1.4| 12″
60| 60,000| 61.0| 250| 121°F| 1/20| 1000| 900| 650| 1.4| 12″
54,000| 55.0| 225| 131°F| 900| 700| 510| 1.4| 12″
72| 72,000| 73.0| 300| 120°F| 1/20| 1000| 1100| 800| 1.4| 14″
64,800| 66.0| 270| 123°F| 900| 950| 700| 1.4| 14″
84| 84,000| 85.0| 350| 115°F| 1/12| 1000| 1400| 900| 2.2| 14″
75,600| 76.0| 315| 123°F| 900| 1100| 750| 2.2| 14″
96| 96,000| 97.0| 400| 123°F| 1/12| 1000| 1400| 930| 2.2| 16″
86,400| 88.0| 360| 132°F| 900| 1100| 800| 2.2| 16″
108| 108,000| 110.0| 450| 115°F| 1/12| 1000| 1800| 1000| 2.2| 16″
97,200| 98.0| 405| 120°F| 900| 1500| 900| 2.2| 16″
120| 120,000| 122.0| 500| 118°F| 1/3| 1140| 1900| 900| 4.5| 18″
—| —| —| —| —| —| —| —| —
132| 132,000| 134.0| 550| 121°F| 1/3| 1140| 2000| 950| 4.5| 18″
—| —| —| —| —| —| —| —| —
144| 144,000| 146.0| 600| 120°F| 1/3| 1140| 2200| 1000| 4.5| 18″
—| —| —| —| —| —| —| —| —
156| 156,000| 160.0| 650| 115°F| 1/3| 1140| 2600| 1150| 4.5| 18″
—| —| —| —| —| —| —| —| —
180| 180,000| 190.0| 770| 135°F| 1/3| 1140| 2200| 800| 4.5| 18″
—| —| —| —| —| —| —| —| —
204| 204,000| 208.0| 850| 124°F| 1/3| 1140| 2900| 1000| 4.5| 18″
—| —| —| —| —| —| —| —| —
240| 240,000| 244.0| 1000| 123°F| 1/3| 1140| 3500| 900| 4.5| 20″
—| —| —| —| —| —| —| —| —
280| 280,000| 280.0| 1100| 121°F| 1/2| 1100| 4200| 980| 5.4| 20″
—| —| —| —| —| —| —| —| —
300| 300,000| 310.0| 1250| 117°F| 1/2| 1100| 5000| 700| 5.4| 24″
—| —| —| —| —| —| —| —| —
360| 360,000| 366.0| 1500| 120°F| 1/2| 1100| 5500| 1000| 5.4| 24″
—| —| —| —| —| —| —| —| —

For the lower output, an optional Speed Controller must be ordered.
For Sound Ratings See Pages 6 & 8.
For further information see page 11, COIL SIZES.
† Stated AMP is full load amps (FLA). AMP draw varies by motor manufacturer ± .2 AMPS. See page 13 for motor data. ‡ Motor HP listed is applicable to standard motor type only. For explosion proof motor HP, see unit installation manual.

Horizontal Unit Heaters Steam Calculations and Correction Factors

| EXAMPLE: –

UNIT SIZE: __ 24

Steam Pressure 10 PSI Entering Air Temp. 40°F

---|---
I. CAPACITY

A. For 2 LBS steam, 60°F entering air

| Read output directly from Table 1, 24,000 BTU/HR (Ref., Std. Unit Size 24)|
B. For higher steam pressures and/or EAT’s above or below 60°F| Multiply output from Table 1 by appropriate correction factor from Table 2 (below)| 24,000 x 1.29 = 30,960 BTU/HR
II. FINAL AIR TEMPERATURE

A. For 2 LBS steam, 60°F entering air

| Read temperature directly from Table 1, 109°F (Ref., Std. Unit Size 24)|
B. For capacities calculated in IB (above)| __Output from IB + EAT = Final Air Temperature

1.085 x CFM from Table 1

| __30,960 + 40 =103.4°F

1.085 x 450

III. FINAL AIR VOLUME

A. For 2 LBS steam, 60°F entering air

| ****

Nom. CFM Final

460 + Final Air Temp from Table 1 x from = Air

530 Table 1 Volume

| ****

__460+109 x 450 =483 CFM

530

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

| ****

Nom. CFM Final

460 + Final Air Temp from IIB x from = Air

530 Table 1 Volume

| ****

__460 + 103.4 x 450 = 478 CFM

530

IV. CONDENSATE PER HOUR

A. For 2 LBS steam, 60°F entering air

| ****

ReadLBS per hour from Table 1, 24.5 LBS/HR (Ref., Std. Unit Size 24)

|

B. For capacities calculated in IB (above)

| ****

__Output from IB = LBS per hour of condensate Latent Heat From Table 3

| ****

__30,960 = 32.5 LBS/HR

953

Table 2 — STEAM CORRECTION FACTORS BASED ON 2 LBS STEAM 60°F EAT

ENTERING AIR

TEMPERATURE

| STEAM PRESSURE — LBS PER SQUARE INCH (SATURATED)
---|---
0| 2| 5| 10| 15| 20| 30| 40| 50| 75| 100| 125| 150
30°F| 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°F| 1.11| 1.16| 1.21| 1.29| 1.34| 1.42| 1.51| 1.60| 1.60| 1.81| 1.93| 2.02| 2.11
50°F| 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°F| 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°F| 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°F| 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°F| 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°F| 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

Table 3 — PROPERTIES OF SATURATED STEAM

| STEAM PRESSURE IN LBS PER SQUARE INCH GAUGE
---|---
0| 2| 5| 10| 15| 20| 30| 40| 50| 75| 100| 125| 150
Steam

Temperature-°F

| ****

212.0

| ****

218.5

| ****

227.1

| ****

239.4

| ****

249.8

| ****

258.8

| ****

274.0

| ****

286.7

| ****

297.7

| ****

319.9

| ****

337.9

| ****

352.9

| ****

365.9

Latent Heat

of Steam

| ****

970

| ****

966

| ****

961

| ****

953

| ****

946

| ****

940

| ****

929

| ****

920

| ****

912

| ****

891

| ****

881

| ****

868

| ****

857

Hot Water Performance Data — Table 4
Performance based on 200°F EWT, 60°F EAT, 20°F TD

Unit Size

| ****

Output BTU Per **Hour***

| ****

GPM

| ****

Final Air Temp

| Pressure Drop FT/H 2 O| ****

Motor HP †

| ****

Motor RPM

| ****

Nominal CFM

| ****

Outlet FPM

| Nominal Amps

at 115VAC**

| ****

Sound Rating

---|---|---|---|---|---|---|---|---|---|---
108A| 8,030

6,800

| .80| 91°F

90°F

| .80| 16 WATT| 1550

1350

| 245

210

| 250

215

| .80

.80

| II

I

118A| 18,400

15,650

| 1.9| 94°F

96°F

| 2.2| 16 WATT| 1550

1350

| 500

420

| 500

420

| .80

.80

| II

I

125A| 24,800

21,230

| 2.5| 102°F

106°F

| 2.2| 25 WATT| 1550

1350

| 580

460

| 590

450

| 1.2

1.2

| II

I

136A| 35,900

32,300

| 3.6| 99°F

100°F

| 3.0| 1/20| 1000

900

| 850

750

| 550

480

| 1.4

1.4

| II

I

18| 13,050

11,725

| 1.3| 95°F

99°F

| .005| 16 WATT| 1550

1350

| 395

350

| 395

350

| .80

.80

| II

I

24| 17,400

15,600

| 1.8| 96°F

98°F

| .014| 16 WATT| 1550

1350

| 450

380

| 450

380

| .80

.80

| II

I

36| 26,100

23,500

| 2.7| 103°F

103°F

| .09| 25 WATT| 1550

1350

| 550

480

| 550

480

| 1.2

1.2

| II

I

48| 34,800

31,300

| 3.5| 103°F

111°F

| .12| 1/20| 1000

900

| 750

630

| 550

460

| 1.4

1.4

| II

I

60| 43,600

39,200

| 4.4| 105°F

112°F

| .17| 1/20| 1000

900

| 900

700

| 650

510

| 1.4

1.4

| II

I

72| 52,300

47,000

| 5.3| 104°F

106°F

| .23| 1/20| 1000

900

| 1100

950

| 800

700

| 1.4

1.4

| II

I

84| 61,000

54,900

| 6.1| 100°F

106°F

| .24| 1/12| 1000

900

| 1400

1100

| 900

750

| 2.2

2.2

| III

II

96| 69,700

62,700

| 7.0| 106°F

113°F

| .29| 1/12| 1000

900

| 1400

1100

| 930

800

| 2.2

2.2

| III

II

108| 78,400

70,500

| 7.9| 100°F

103°F

| .36| 1/12| 1000

900

| 1800

1500

| 1000

900

| 2.2

2.2

| III

II

120| 87,100

| 8.8| 102°F

| .39| 1/3| 1140

| 1900

| 900

| 4.5

| III

132| 95,800

| 9.6| 104°F

| .41| 1/3| 1140

| 2000

| 950

| 4.5

| IV

144| 104,000

| 10.4| 104°F

| .43| 1/3| 1140

| 2200

| 1000

| 4.5

| IV

156| 113,000

| 11.3| 100°F

| .53| 1/3| 1140

| 2600

| 1150

| 4.5

| IV

180| 118,000

| 11.8| 110°F

| .60| 1/3| 1140

| 2200

| 800

| 4.5

| III

204| 148,100

| 14.9| 107°F

| .79| 1/3| 1140

| 2900

| 1000

| 4.5

| IV

240| 174,000

| 17.4| 106°F

| 1.06| 1/3| 1140

| 3500

| 900

| 4.5

| IV

280| 209,100

| 21.0| 106°F

| 1.33| 1/2| 1100

| 4200

| 980

| 5.4

| IV

300| 230,000

| 23.0| 102°F

| 2.1| 1/2| 1100

| 5000

| 700

| 5.4

| IV

360| 261,300

| 26.2| 103°F

| 2.1| 1/2| 1100

| 5500

| 1000

| 5.4

| IV

For the lower output, an optional Speed Controller must be ordered.
For Fan Diameter See Page 4.
Stated AMP is full load amps (FLA). AMP draw varies by motor manufacturer ± .2 AMPS. See page 13 for motor data. † Motor HP listed is applicable to standard motor type only. For explosion proof motor HP, see unit installation manual.

Horizontal Unit Heaters Hot Water Calculations and Correction Factors

| ****

EXAMPLE: –

UNIT SIZE: __ 24

Entering Water Temperature 160°F Entering Air Temperature 40°F Water Temperature Drop __ 10°F

---|---
I. CAPACITY @ 20 ° TD:

A. For 200°F EWT, 60°F EAT

| ****

Read output directly from Table 4, 17,400 BTU/HR (Ref., Std. Unit Size 24)

|
B. For EWT and/or EAT above or below Standard| Multiply output from Table 4

by factor from Table 5 (below)

| ****

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

II. CAPACITY AT OTHER TD’s

A. For TD’s from 5 to 60°F

| Multiply output obtained in IA or IB (above) by appropriate factor from Table 6 (below)| IA – 17,400 x 1.15 = 20,010 BTU/HR

– OR –

IB – 15,277 x 1.15 = 17,569 BTU/HR

III. GPM AT OTHER TD’s

A. For TD’s from 5 to 60°F

| Multiply GPM of unit for 20°F TD, from Table 4

by appropriate factor from Table 6 (below)

| 1.8 x 2.30 = 4.14 GPM (Applies only to units with Std. 200°F EWT, 60°F EAT) For all others calculat using formula – GPM = BTU

500 x TD

IV. CAPACITY AT OTHER RATES OF WATER FLOW| Multiply output from Table 4 by factor from Table 8 (below)|
V. PRESSURE LOSS AT OTHER TD’s

A. For TD’s from 5 to 60°F

| Multiply PD of unit for 20°F TD, from Table 4

by appropriate factor from Table 6 (below)

| ****

.014 x 5.00 = .07 Ft. H2O

Table 5 — HOT WATER CONVERSION FACTORS BASED ON 200°F ENTERING WATER 60°F ENTERING AIR 20°F TEMPERATURE DROP

ENTERING AIR

TEMPERATURE

| ENTERING WATER TEMPERATURE — 20°F WATER TEMPERATURE DROP
---|---
100°F| 120°F| 140°F| 160°F| 180°F| 200F°| 220°F| 240°F| 260°F| 280°F| 300°F
30°F| 0.518| 0.666| 0.814| 0.963| 1.120| 1.268| 1.408| 1.555| 1.702| 1.850| 1.997
40°F| 0.439| 0.585| 0.731| 0.878| 1.025| 1.172| 1.317| 1.464| 1.609| 1.755| 1.908
50°F| 0.361| 0.506| 0.651| 0.796| 0.941| 1.085| 1.231| 1.375| 1.518| 1.663| 1.824
60°F| 0.286| 0.429| 0.571| 0.715| 0.857| 1.000| 1.143| 1.286| 1.429| 1.571| 1.717
70°F| 0.212| 0.353| 0.494| 0.636| 0.777| 0.918| 1.060| 1.201| 1.342| 1.483| 1.630
80°F| 0.140| 0.279| 0.419| 0.558| 0.698| 0.837| 0.977| 1.117| 1.257| 1.397| 1.545
90°F| 0.069| 0.207| 0.345| 0.483| 0.621| 0.759| 0.897| 1.035| 1.173| 1.311| 1.462
100°F| 0| 0.137| 0.273| 0.409| 0.546| 0.682| 0.818| 0.955| 1.094| 1.230| 1.371

Table 6 — HOT WATER BTU, GPM AND PRESSURE LOSS FACTORS BASED ON STANDARD CONDITIONS OF 200°F ENTERING WATER 60°F ENTERING AIR & 20°F WATER DROP

USE FACTORS FROM THIS TABLE TO OBTAIN APPROXIMATE RESULTS	TEMPERATURE DROP
5°F	10°F

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

1.25

| ****

1.15

| ****

1.08

| ****

1.00

| ****

.94

| ****

.90

| ****

.83

| ****

.76

| ****

.72

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

5.00

| ****

2.30

| ****

1.44

| ****

1.00

| ****

.74

| ****

.59

| ****

.40

| ****

.30

| ****

.24

To obtain Pressure Loss Feet of Water for other temperature Drops, multiply Basic loss at 20°F drop by Factor.| ****

10.00

| ****

5.00

| ****

2.00

| ****

1.00

| ****

.60

| ****

.40

| ****

.20

| ****

.13

| ****

.07

Table 7 — MINIMUM WATER FLOW — GPM

UNIT SIZE MIN. GPM| 108A

.125

| 118A

.125

| 125A

.125

| 136A

.125

| 18

.75

| 24

1.24

| 36

1.24

| 48

1.49

| 60

1.49

| 72

1.62

| 84

1.86

| 96

3.35

---|---|---|---|---|---|---|---|---|---|---|---|---
UNIT SIZE MIN. GPM| 108

3.35

| 120

3.60

| 132

4.09

| 144

4.09

| 156

4.09

| 180

4.34

| 204

4.34

| 240

4.59

| 280

4.59

| 300

6.08

| 360

6.08

|

Table 8 — 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

Technical Data
The performance data listed on page 6 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 ratings for various applications. The lower the number, the quieter the unit and the lower the sound requirement.

CORRECTIONS WHEN USING GLYCOL SOLUTION IN SYSTEM

Mounting Heights and Throws — Table 9

Unit Size| Maximum Mounting Height| Approximate Maximum Throw| Unit Size| Maximum Mounting Height| Approximate Maximum Throw
---|---|---|---|---|---
108A| 8′| 20′| 108| 11′| 40′
118A| 8′| 25′| 120| 12′| 40′
125A| 9′| 29′| 132| 13′| 54′
136A| 9′| 29′| 144| 13′| 55′
18| 8′| 20′| 156| 13′| 55′
24| 8′| 24′| 180| 13′| 53′
36| 9′| 28′| 204| 13′| 55′
48| 9′| 30′| 240| 14′| 57′
60| 10′| 30′| 280| 14′| 57′
72| 10′| 29′| 300| 15′| 58′
84| 10′| 30′| 360| 15′| 60′
96| 11′| 38′|

This table is based on 60°F entering air and either 2 Lbs steam or 200°F water with a 20°F TD. The data is based on the higher speed CFM throughout
and velocity. Care should be exercised in locating adjacent unit heaters and allowance should be made for obstruc-tions in the air pattern and conflicting air currents from other air moving devices.

Dimensional Data

Table 10 – UNIT SIZES 18 THRU 360 (HEADER TYPE)

Unit Size| A

inches

(mm)

| B

inches

(mm)

| C

inches

(mm)

| D

inches

(mm)

| E

inches

(mm)

| F

inches

(mm)

| **G***

inch,es

(mm)

| **H***

inches

(mm)

| J

inches

(mm)

| K

inches

(mm)

| L

inches

(mm)

| M

inches

(mm)

| N

inches

(mm)

| Number

of Louvers

| Nom. Fan Diam.

inches (mm)

| Approx. Ship Wt .

lbs. (kg)

---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---
18| 145⁄8

(371)

| 75⁄16

(186)

| 15

(381)

| 7½

(191)

| 61⁄8

(156)

| 215⁄16

(75)

| 3¼

(83)

| 93⁄8

(238)

| 12¼

(311)

| 9½

(241)

| 1¼

(32)

| 2¼

(57)

| 127⁄8

(327)

| 4| 9

(229)

| 26

(11.8)

24

36

| 145⁄8

(371)

| 75⁄16

(186)

| 18

(457)

| 9

(229)

| 61⁄8

(156)

| 215⁄16

(75)

| 3¼

(83)

| 93⁄8

(238)

| 12¼

(311)

| 12½

(318)

| 1¼

(32)

| 2¼

(57)

| 127⁄8

(327)

| 5| 10

(254)

| 30

(13.6)

48| 171⁄8

(435)

| 89⁄16

(217)

| 20½

(521)

| 10¼

(260)

| 57⁄8

(149)

| 215⁄16

(75)

| 511⁄16

(144)

| 117⁄16

(291)

| 14¾

(375)

| 15

(381)

| 1¼

(32)

| 1¾

(44)

| 153⁄8

(391)

| 6| 12

(305)

| 41

(18.6)

60| 171⁄8

(435)

| 89⁄16

(217)

| 20½

(521)

| 10¼

(260)

| 57⁄8

(149)

| 215⁄16

(75)

| 51⁄16

(129)

| 1015⁄16

(278)

| 14¾

(375)

| 15

(381)

| 1¼

(32)

| 1¾

(44)

| 153⁄8

(391)

| 6| 12

(305)

| 41

(18.6)

72| 183⁄8

(467)

| 93⁄16

(233)

| 21¾

(552)

| 107⁄8

(276)

| 6

(152)

| 215⁄16

(75)

| 51⁄16

(129)

| 111⁄16

(281)

| 16

(406)

| 16¼

(413)

| 1¼

(32)

| 1¾

(44)

| 165⁄8

(422)

| 7| 14

(356)

| 44

(19.9)

84| 207⁄8

(530)

| 107⁄16

(265)

| 24¼

(616)

| 121⁄8

(308)

| 61⁄8

(156)

| 215⁄16

(75)

| 511⁄16

(144)

| 1113⁄16

(300)

| 18½

(470)

| 18¾

(476)

| 1¼

(32)

| 1¾

(44)

| 191⁄8

(486)

| 8| 14

(356)

| 47

(21.3)

96

108

| 195⁄8

(498)

| 913⁄16

(249)

| 24

(610)

| 12

(305)

| 65⁄16

(160)

| 33⁄16

(81)

| 7½

(191)

| 1313⁄16

(351)

| 17¼

(438)

| 17½

(445)

| 1½

(38)

| 1¾

(44)

| 177⁄8

(454)

| 8| 16

(406)

| 49

(22.2)

120| 207⁄8

(530)

| 107⁄16

(265)

| 25¼

(641)

| 125⁄8

(321)

| 65⁄16

(160)

| 33⁄16

(81)

| 611⁄16

(170)

| 13

(330)

| 18½

(470)

| 18¾

(476)

| 1½

(38)

| 1¾

(44)

| 191⁄8

(486)

| 8| 18

(457)

| 59

(26.7)

132

144

| 233⁄8

(594)

| 1111⁄16

(297)

| 27¾

(705)

| 137⁄8

(352)

| 65⁄16

(160)

| 33⁄16

(81)

| 75⁄8

(194)

| 14

(356)

| 21

(533)

| 21¼

(540)

| 1½

(38)

| 1¾

(44)

| 215⁄8

(549)

| 9| 18

(457)

| 74

(33.5)

156| 233⁄8

(594)

| 1111⁄16

(297)

| 27¾

(705)

| 137⁄8

(352)

| 65⁄16

(160)

| 33⁄16

(81)

| 77⁄16

(194)

| 13¾

(349)

| 21

(533)

| 21¼

(540)

| 1½

(38)

| 1¾

(44)

| 215⁄8

(549)

| 9| 18

(457)

| 74

(33.5)

180

204

| 245⁄8

(625)

| 125⁄16

(313)

| 29

(737)

| 14½

(368)

| 63⁄8

(162)

| 33⁄16

(81)

| 77⁄16

(194)

| 13¾

(349)

| 22¼

(565)

| 22½

(572)

| 1½

(38)

| 1¾

(44)

| 227⁄8

(581)

| 9| 18

(457)

| 90

(40.8)

240| 277⁄8

(708)

| 1315⁄16

(354)

| 30¼

(768)

| 151⁄8

(384)

| 81⁄8

(206)

| 33⁄16

(81)

| 57⁄8

(149)

| 14

(356)

| 25½

(648)

| 23¾

(603)

| 2

(51)

| 1¾

(44)

| 261⁄8

(664)

| 10| 20

(508)

| 143

(65)

280| 277⁄8

(708)

| 1315⁄16

(354)

| 30¼

(768)

| 151⁄8

(384)

| 81⁄8

(206)

| 33⁄16

(81)

| 95⁄8

(244)

| 17¾

(451)

| 25½

(648)

| 23¾

(603)

| 2

(51)

| 1¾

(44)

| 261⁄8

(664)

| 10| 20

(508)

| 154

(70)

300

360

| 333⁄8

(848)

| 1611⁄16

(424)

| 37¾

(959)

| 187⁄8

(479)

| 9

(229)

| 33⁄16

(81)

| 95⁄8

(244)

| 185⁄8

(473)

| 31

(787)

| 31¼

(794)

| 2

(51)

| 1¾

(44)

| 315⁄8

(803)

| 13| 24

(610)

| 203

(92)

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

NOTES:

OSHA guard standard on all serpentine models and header models 18 thru 48 supplied with 1 phase motors (dimensions shown in tables).
Standard motor and standard guard shown.
All 3 phase and explosion proof motors are shelf mounted.
Optional OSHA guards available for all units with standard 1 phase motor.

Specifications

GENERAL
Furnish and install, where indicated or scheduled on plans the horizontal steam/hot water unit heater. Unit shall be equipped as specified herein. All units shall be installed in a neat and workmanlike manner in accordance with this specification and the manufacturer’s installation instruction.
CASING
Casings shall be 20-gauge die-formed steel. Paint finish shall be of lead- free, chromate free, polyester melamine resin base. Finish shall be baked at 400°F.
COIL SIZES 18 – 360
Coil elements and headers shall be of heavy wall drawn seamless copper tubing. Element tubes shall be brazed into extruded header junctions. Pipe connection saddles shall be of cast bronze. Aluminum fins shall have drawn collars to assure permanent bond with expanded element tubes and exact spacing. All Element Assemblies are submersion tested at the factory at 200 PSI. Under maximum conditions, coils are rated at 150 PSI at 366°F for steam and 150 PSI at 320°F for hot water. We recommend operating pressure of 75 PSI at 320°F for long life.
MOTORS
Motors shall be totally enclosed, resilient mounted with class “B” windings. All motors shall be designed for horizontal mounting. Motors under 1/3 HP are totally enclosed, frame mounted, 115/1/60 with thermal overload protection and permanently lubricated sleeve bearings with optional solid state speed controller available. 1/3 HP (115/1/60) motors are open frame construction, with thermal overload protection and ball bearings. 1/3 HP
at (230 volt) and 1/2 HP (230 volt) motors are open frame construction, with thermal overload protection and ball bearings. 1/3 and 1/2 HP motors are available in single and 3 phase in open frame construction or explosion-proof housings, all the above are available as options.

EXPLOSION PROOF MOTORS
An enclosed motor whose enclosure is designed and constructed to withstand an explosion of a specific gas or vapor which may occur within the motor and to prevent the ignition of this gas or vapor surrounding the machine.

Horizontal unit heater motors comply with the National Electrical Code classification as follows:

Class I, Group D; all sizes
Class II, Group F; all sizes
Class II, Group G; all sizes
Division I & II Installations
T-code (T3B)

Explosion proof equipment is not generally available for Class I, Groups A and B and it is necessary to isolate motors from the hazardous area. All explosion proof motors are shelf mounted.

FANS
Fans shall be of the aluminum blade, hub type designed and balanced to assure maximum air delivery, low motor horsepower requirements and quiet operation. Blades are spark proof.

FAN GUARDS
Fan guards shall be welded steel, zinc plated or painted. To meet ETL and OSHA requirements, units mounted below 8 feet from floor must be equipped with an OSHA fan guard. OSHA fan guards are standard on coil sizes 18 through 48 and optional on coil sizes 60 through 360 with single phase, standard motors only.

AIR DEFLECTION LOUVERS
Units shall be equipped with horizontal, individually adjustable louvers. Vertical louvers for four-way air control shall be available as an optional extra.

Serpentine Coil Horizontal Unit Heaters Dimensional Data

NOTE: Motors are totally enclosed, thermally protected, sleeve bearing, with 2″ (h) x 4″ (w) conduit connection boxes. Nutserts are attached to enclosure for balanced hanging.

Table 11 – STANDARD SPECIFICATION

Unit Size

| H

inches

(mm)

| W

inches

(mm)

| A

inches

(mm)

| B

inches

(mm)

| C

inches

(mm)

---|---|---|---|---|---
108A| 16

(406)

| 18

(457)

| 167⁄32 (412)| 11¼ (286)| 4¼ (108)
118A| 16

(406)

| 18

(457)

| 167⁄32 (412)| 11¼ (286)| 4¼ (108)
125A| 16

(406)

| 18

(457)

| 167⁄32 (412)| 11¼ (286)| 4¼ (108)
136A*| 18½ (470)| 20½ (521)| 1822⁄32 (475)| 13¾ (349)| 511⁄16 (144)

Unit Size

| Number of Louvers| Nominal Fan Diameter

inches (mm)

| Approx. Ship Wt.

lb. (kg)

---|---|---|---
108A| 5| 9 (229)| 22 (10.0)
118A| 5| 10 (254)| 24 (10.9)
125A| 5| 10 (254)| 25 (11.3)
136A*| 6| 12 (305)| 31 (14.0)

DIMENSION “C” IS TO BACK OF MOTOR, NOT MOTOR CONDUIT CONNECTOR AS SHOWN ABOVE.

NOTE: OSHA type fan guard standard on sizes 108A through 136A.

Serpentine Coil Horizontal Unit Heaters Specifications

GENERAL
Furnish and install, where indicated or scheduled on plans the horizontal hot water unit heater. Unit shall be equipped as specified herein.
All units shall be installed in a neat and workmanlike manner in accordance with this specification and the manufacturer’s installation instruction.

CASING
Casings shall be 20-gauge die-formed steel. Paint finish shall be of lead- free, chromate free, polyester melamine resin base. Finish shall be baked at 400°F.

COIL SIZES 108A – 136A
Coil is a serpentine design with seamless copper tubing. Aluminum fins shall have drawn collars to assure permanent bond with expanded tubes. Tubing connection shall be 3/8 inch copper tubing, type “M” (.500 OD). Coils shall be factory tested at 200 PSI. Coils have a max operating entering water temperature of 320°F.

MOTORS
Motors shall be totally enclosed, resilient mounted with class “B” windings. All motors shall be designed for horizontal mounting.

FANS
Fans shall be of the aluminum blade type, designed and balanced to assure maximum air delivery, low motor horsepower requirements and quiet operation.

OSHA FAN GUARDS
OSHA fan guards shall be welded steel, zinc plated or painted. OSHA fan guards are standard on all models.

AIR DEFLECTION LOUVERS
Units shall be equipped with horizontal, individually adjustable louvers.

Horizontal Unit Heaters Motor Characteristics

Table 12 – TOTALLY ENCLOSED MOTOR TYPE

Unit Sizes

| ****

AMP

| ****

MCA

| ****

HP

| ****

RPM

---|---|---|---|---
115/1/60
18, 24,

108A, 118A

| 0.8| 1.0| 16W| 1550
136A| 1.4| 1.8| 1/20| 1000
36, 125A| 1.2| 1.5| 25W| 1550
48, 60, 72| 1.4| 1.8| 1/20| 1000
84, 96, 108| 2.2| 2.8| 1/12*| 1000
120, 132,

144, 156,

180, 204, 240

| ****

4.5

| ****

5.6

| ****

1/3

| ****

1140

280, 300, 360| 5.4| 6.8| 1/2| 1100
230/1/60
18, 24,

108A, 118A

| 0.4| 0.5| 16W| 1550
136A| 1.4| 1.8| 1/20†| 1000
36, 125A| 0.6| 0.8| 25W| 1550
48, 60, 72| 1.4| 1.8| 1/20†| 1000
84, 96, 108| 2.2| 2.8| 1/12†| 1000
120, 132

144, 156,

180, 204, 240

| ****

4.5

| ****

5.6

| ****

1/3†

| ****

1140

280, 300, 360| 5.4| 6.8| 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

| ****

1/2**

| ****

1140

Optional variable speed switch is available.
These motors are without thermal overload protection. Motors without thermal overload protection must be installed with the optional manual starter or other field provided overload protection.

NOTE

All motors are constant speed and operate at top speed as indicated in motor data. Unit sizes 18 through 108, including 108A, 118A, 125A and 136A 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. Unit sizes 120 through 360 operate at constant speed as indicated in motor data. All 1/4 HP motors are PSC.
Motors under 1/3 HP are totally enclosed, frame mounted, 115/1/60 with thermal overload protection and permanently lubricated sleeve bearings with optional speed controller available. 1/3 HP (115/1/60) motors are open frame constant speed with thermal over-load protection and ball bearings. 1/3 HP (230 volt) and 1/2 HP (230 volt) motors are open frame constant speed with thermal overload protection and ball bearings.

Table 13 – EXPLOSION PROOF WITH THERMAL OVERLOAD MOTOR TYPE

Unit Sizes

| ****

AMP

| ****

MCA

| ****

HP

| ****

RPM

---|---|---|---|---
115/1/60
48, 60, 72,

84, 96, 108,

120, 132

| ****

3.7

| ****

4.6

| ****

1/6

| ****

1140

144, 156,

180, 204

| ****

5.4

| ****

6.8

| ****

1/4

| ****

1140

240| 7.8| 9.8| 1/3| 1140
280, 300, 360| 9.6| 12.0| 1/2| 1140
230/1/60
48, 60, 72,

84, 96, 108,

120, 132

| ****

3.7

| ****

4.6

| ****

1/6†

| ****

1140

144, 156,

180, 204

| ****

5.4

| ****

6.8

| ****

1/4†

| ****

1140

240| 3.9| 4.9| 1/3| 1140
280, 300, 360| 4.8| 6.0| 1/2| 1140
230/460/3/60
144, 156,

180, 204,

240, 280,

300, 360

| ****

2.2/1.1

| ****

2.8/1.4

| ****

1/3

| ****

1140

These motors are 115/230 volts.

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

NOTE

1/3 and 1/2 HP motors are available as 230 volt single and 3 phase in open frame and explosion-proof housings, all available as options. 1/3 and 1/2 HP motors operate at single speed only.
Stated AMP draw is full load amp (FLA). AMP draw varies by motor manufacturer ± .2 AMPS. Verify FLA per unit motor data plate.

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

Vertical Unit Heaters Features and General Specifications

Vertical projection unit heaters provide heat where it is required in commercial and industrial applications. Mounted near the ceiling, this unit provides air circulation and reduces stratification, without occupying otherwise usable building space. Units can be provided with an optional diffuser for patterned discharge or without a diffuser for higher velocity ‘spot’ heating near doorways and other high-loss areas.
Vertical units are available in fifteen sizes for steam or hot water heating. Steam capacities range from 140 to 2,580 EDR (26.0 to 705 MBH) (2 PSI w/60°F EAT).
Hot water capacities range from 18.9 to 519.4 MBH (200°F EWT/20°F drop w/60°F EAT).

CONSTRUCTION
The unit casing is formed by two square, 20-gauge steel plates. The bottom plate forms an orifice for air delivery. Air ports are stamped in the top plate of standard units for easy conversion of low output units.

FAN
The aluminum blade fans are quiet, factory balanced and sturdy for standard or sparkproof applications.

OPTIONAL OSHA FAN GUARD, LOUVER CONE DIFFUSER
To meet ETL and OSHA requirements, units mounted below 8 feet (2.4 m) must be equipped with an OSHA Fan Guard. If adjustments to the vertical airlow pattern are desired, the Louver Cone Diffuser can be installed.

Note: Vertical unit heaters can support either OSHA Fan Guard or the Louver Cone Diffuser – both units cannot be installed on the same unit.

HEATING ELEMENT
Hot water-steam coils are rectangular 3 or 4-sided, one-pass, multiple circuit, with aluminum fins mechanically bonded to the tubes. Standard coils are seamless copper tubing. Coils tested at 375 PSI under water. Supply and return connections are steel pipe. Standard coils have .025 copper tubing suitable for use on steam pressure to 75 PSI or hot water up to 225 PSI or 325°F.

MOTORS
Standard motors are 115/60/1, totally enclosed, with thermal overload protection for all vertical units through size 285. Standard motors for sizes 40, 62 and 77 are shaded pole, sleeve bearing. The vertical 104 motor is permanent split capacitor type with sleeve bearings. Motor for unit sizes 125 through 285 are permanent split capacitor types with permanently lubricated ball bearings. Motors used on unit sizes 317 through 700 are 230/460/60/3, totally enclosed, with permanently lubricated ball bearings. Unit sizes smaller than 317 are also available with 230/460/60/3 motors.

All motors fractional HP and integral HP, have Class “B” insulation. The 115/60/1 motors used as standard on unit sizes 40 through 104 can be operated at multiple speeds with the addition of a solid-state control.
All units are available with 1140 RPM explosion-proof motors.

EXPLOSION PROOF MOTORS
An enclosed motor whose enclosure is designed and constructed to withstand an explosion of a specific gas or vapor which may occur within the motor and to prevent the ignition of this gas or vapor surrounding the machine.

Vertical unit heater motors comply with the National Electrical Code classification as follows:

Class I, Group D; all sizes
Class II, Group F; all sizes
Class II, Group G; all sizes
Division I & II Installations
T-code (T3B)

Explosion proof equipment is not generally available for Class I, Groups A and B and it is necessary to isolate motors from the hazardous area.

THERMOSTATS
Line voltage wall thermostats are in stock for immediate shipment. All models are SPST with bimetal thermometer, set point adjustment, 40 to 90°F (5 to 30°C) range and selector switches. Standard duty models with “off-auto” and “auto-off-fan” and a heavy duty model with “auto-off-fan” switching are available. Other models available on request.

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 120 volt is also available. Control can be used for direct or reverse acting applications as a high or low limit.

STEAM PRESSURE CONTROL
SPST switch opens on a rise in pressure. Control is automati-cally reset, has a range of 0 to 15 PSIG (0 to 103 KPa) and has an adjustable differential. Other actions, ranges, circuits and manual reset models are available on request.

MANUAL STARTERS
Single and three-phase models are available. Standard models are single-speed, toggle-operated, NEMA Type 1 and are surface-mounted. Note: While these manual starters can be used with explosion-proof motors, they do not meet requirements for use in explosion-proof applications.

WALL MOUNTED SPEED CONTROLLERS
Horizontal units up to 108 and vertical units up to 104 with standard motors (115 volt) 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 230 volt motors operate only at rated speed and CFM – See performance data charts.

Steam Performance Data — Table 14
Performance based on 2 Lbs steam pressure at heater with air entering @ 60°F.

STANDARD UNITS

Unit Size

| ****

BTU

**Per Hour***

| Condensate Lbs Per Hour| Square Foot EDR| ****

Final Temperature

| ****

Motor HP †

| ****

Motor RPM

| CFM

70 °F

Air Basis

| ****

Outlet Velocity

| Nominal Amps at 115 VAC**| ****

Sound Rating

---|---|---|---|---|---|---|---|---|---|---
40| 41,300| 43| 172| 124°F| 1/40| 1550| 595| 877| 1.2| I
33,600| 55| 140| 131°F| 1150| 436| 658
62| 65,500| 68| 273| 121°F| 1/20| 1550| 989| 1005| 2.1| II
52,800| 55| 220| 129°F| 1150| 706| 727
77| 80,600| 83| 336| 122°F| 1/20| 1550| 1200| 1220| 2.1| II
65,100| 67| 271| 130°F| 1150| 858| 894
104| 101,800| 106| 424| 123°F| 1/8| 1070| 1490| 980| 1.2| II
87,900| 91| 366| 129°F| 850| 1180| 783
125| 124,400| 129| 518| 124°F| 1/6| 1100| 1790| 1170| 2.3| III
144| 152,000| 157| 633| 123°F| 1/6| 1100| 2220| 1045| 2.3| III
164| 173,000| 179| 720| 121°F| 1/6| 1100| 2620| 1230| 2.3| IV
200| 210,200| 208| 838| 118°F| 1/4| 1100| 3200| 1495| 3.6| III
237| 249,800| 260| 1040| 115°F| 1/4| 1100| 4180| 1205| 3.6| IV
285| 283,800| 294| 1180| 119°F| 1/2| 1100| 4430| 1275| 5.4| IV
317| 333,400| 345| 1390| 119°F| 3/4| 1140| 5210| 1500| N/A| IV
367| 386,000| 400| 1610| 118°F| 3/4| 1140| 6140| 1770| N/A| IV
495| 496,000| 514| 2070| 117°F| 1-1/2| 1160| 8020| 1640| N/A| IV
585| 585,000| 605| 2440| 117°F| 1-1/2| 1160| 9450| 1930| N/A| IV
700| 705,000| 729| 2940| 119°F| 3| 1165| 11,000| 2250| N/A| IV

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

To determine BTU per hour capacities at various steam pressures and entering air temperatures, use conversion factors from Table 17, page 17.Final temperatures at new conditions can be calculated by applying basic formula.
Stated AMP is full load amps (FLA). AMP draw varies by motor manufacturer ±0.2 AMPS. See Page 25 for motor data. † Motor HP listed is applicable to standard motor type only. For explosion proof motor HP, see unit installation manual.

Steam Performance Data — Table 15
Performance based on 2 Lbs steam pressure at heater with air entering @ 60°F.

LOW OUTPUT UNITS
STANDARD VERTICAL UNITS WITH ALL AIR PORTS OPEN

Unit Size

| ****

BTU

Per Hour

| Condensate Lbs Per Hour| Square Foot EDR| ****

Final Temperature

| ****

Motor HP †

| ****

Motor RPM

| CFM

70° F

Air Basis

| ****

Outlet Velocity

| ****

Sound Rating

---|---|---|---|---|---|---|---|---|---
40L| 34,800| 36| 145| 108°F| 1/40| 1550| 668| 950| I
26,000| 27| 108| 111°F| 1150| 470| 672
62L| 57,200| 59| 238| 104°F| 1/20| 1550| 1200| 1190| I
45,800| 48| 191| 109°F| 1150| 862| 858
77L| 68,000| 71| 283| 106°F| 1/20| 1550| 1360| 1350| II
55,000| 57| 229| 111°F| 1150| 995| 992
104L| 85,400| 89| 356| 108°F| 1/8| 1070| 1640| 1050| II
71,200| 74| 296| 111°F| 850| 1290| 827
125L| 111,000| 115| 462| 107°F| 1/6| 1100| 2180| 1390| III
144L| 125,000| 130| 524| 109°F| 1/6| 1100| 2360| 1080| III
164L| 149,000| 154| 620| 107°F| 1/6| 1100| 2920| 1340| IV
200L| 176,800| 183| 736| 108°F| 1/4| 1100| 3390| 1560| III
237L| 214,900| 224| 895| 104°F| 1/4| 1100| 4500| 1270| IV
285L| 251,800| 260| 1050| 106°F| 1/2| 1100| 5040| 1420| IV
317L| 291,000| 302| 1210| 107°F| 3/4| 1140| 5700| 1610| IV
367L| 344,000| 356| 1430| 108°F| 3/4| 1140| 6600| 1870| IV
495L| 428,000| 446| 1785| 102°F| 1-1/2| 1160| 9380| 1860| IV
585L| 515,000| 533| 2140| 106°F| 1-1/2| 1160| 10,300| 2060| IV
700L| 620,000| 642| 2580| 108°F| 3| 1165| 11,900| 2380| IV

NOTES:
Constant speed units are rated at capacities shown in regular type; capacities shown in italic faced type apply only to units with multi-speed motors.
To determine BTU per hour capacities at various steam pressures and entering air temperatures, use conversion factors from Table 17, page 17. Final temperatures at new conditions can be calculated by applying basic formula.

† Motor HP listed is applicable to standard motor type only. For explosion proof motor HP, see unit installation manual.

Vertical Unit Heaters Steam Calculations and Correction Factors

| EXAMPLE: –

UNIT SIZE: __ 40

Steam Pressure 10 PSI Entering Air Temp. 40°F

---|---
I. CAPACITY

A. For 2 lbs. steam, 60°F entering air

| ****

Read output directly from Tables 14 & 15: 41,300 BTU/HR

|
B. For higher steam pressures and/or EAT’s above or below 60°F| Multiply output from Tables 14 & 15 by appropriate correction factor from Table 16 (below)| ****

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

II. FINAL AIR TEMPERATURE

A. For 2 LBS steam, 60°F entering air

| ****

Read temperature directly from Tables 14 & 15: 124°F

|
B. For capacities calculated in IB (above)| __Output from IB + EAT = Final Air Temperature

1.085 x CFM from Table 14

| __52,451 + 40 = 121.0°F

1.085 x 595

III. FINAL AIR VOLUME

A. For 2 LBS steam, 60°F entering air

| Nom. CFM Final

460 + Final Air Temp from Table 14 x from = Air

530 Table 14 Volume

| ****

__460+124 x 595 = 655 CFM

530

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

| Nom. CFM Final

460 + Final Air Temp from IIB x from = Air

530 Table 14 Volume

| ****

460+121.0 x 595 = 652 CFM

530

IV. CONDENSATE PER HOUR

A. For 2 LBS steam, 60°F entering air

| ****

Read LBS per hour from Tables 14 & 15: 43 LBS/HR

|
B. For capacities calculated in IB (above)| _Output from IB = LBS per hour of condensate Latent Heat From Table 17| 52,451_ = 55.0 LBS/HR

953

Table 16 — STEAM CORRECTION FACTORS BASED ON 2 LBS. STEAM 60°F EAT

ENTERING AIR

TEMPERATURE

| STEAM PRESSURE — LBS PER SQUARE INCH (SATURATED)
---|---
0| 2| 5| 10| 15| 20| 30| 40| 50| 75
30°F| 1.18| 1.22| 1.27| 1.34| 1.40| 1.45| 1.53| 1.61| 1.67| 1.79
40°F| 1.11| 1.15| 1.20| 1.27| 1.32| 1.37| 1.46| 1.53| 1.59| 1.71
50°F| 1.03| 1.07| 1.12| 1.19| 1.25| 1.30| 1.39| 1.46| 1.52| 1.64
60°F| 0.96| 1.00| 1.05| 1.12| 1.18| 1.23| 1.32| 1.39| 1.45| 1.57
70°F| 0.90| 0.93| 0.98| 1.05| 1.11| 1.16| 1.25| 1.32| 1.38| 1.49
80°F| 0.83| 0.86| 0.91| 0.98| 1.04| 1.09| 1.18| 1.25| 1.31| 1.42
90°F| 0.76| 0.80| 0.85| 0.91| 0.97| 1.02| 1.11| 1.18| 1.24| 1.36
100°F| 0.69| 0.73| 0.78| 0.85| 0.90| 0.96| 1.04| 1.11| 1.17| 1.29

Table 17 — PROPERTIES OF SATURATED STEAM

| STEAM PRESSURE IN LBS PER SQUARE INCH GAUGE
---|---
0| 2| 5| 10| 15| 20| 30| 40| 50| 75
Steam

Temperature-°F

| ****

212.0

| ****

218.5

| ****

227.1

| ****

239.4

| ****

249.8

| ****

258.8

| ****

274.0

| ****

286.7

| ****

297.7

| ****

319.9

Latent Heat

of Steam

| ****

970

| ****

966

| ****

961

| ****

953

| ****

946

| ****

940

| ****

929

| ****

920

| ****

912

| ****

891

NOTE

Ratings apply only to free inlet and discharge without diffusers.
All motors are constant speed and operate at top speed as indicated in motor data. Sizes 40 through 104 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. Sizes 164 through 700 operate at constant speed as indicated in motor data.
For specific motor data refer to motor specifications on page 25.
To correct for entering air temperatures, use 1°F temperature rise for each foot in mounting height. As an example, 60°F air is required at work area (5 feet above floor) units are to be mounted at (20 feet) above floor. Mounting height (20 feet) minus work height (5 feet) equals differential (15 feet) or, 15°F rise in air temperature at unit air inlet. Correct for actual inlet air temperature of 75°F (60°F + 15°F = 75°F EAT) on Table 16.

Hot Water Performance Data — Table 18**

STANDARD OUTPUT UNITS

Unit Size| Water Temp Drop| Output MBH| ****

GPM

| H 2 O

Pressure

Drop

| Final Air Temp| Motor HP †| Motor RPM| Nominal CFM| Outlet Velocity| Sound Rating
---|---|---|---|---|---|---|---|---|---|---

40

| 10°F

20°F

30°F

| 28.8

22.7

16.7

| 5.93

2.34

1.15

| .37

.06

.02

| 104.6°F

95.2°F

85.9°F

| ****

1/40

| ****

1550

| ****

595

| ****

877

| I

40*

| 10°F

20°F

30°F

| 22.9

18.1

13.4

| 4.71

1.87

.92

| .24

.04

.01

| 108.3°F

98.3°F

88.4°F

| ****

1/40

| ****

1150

| ****

436

| ****

658

| I

62

| 10°F

20°F

30°F

| 48.1

39.6

31.1

| 9.92

4.08

2.14

| 1.05

.19

.06

| 104.8°F

96.9°F

89.0°F

| ****

1/20

| ****

1550

| ****

989

| ****

1005

| II

62*

| 10°F

20°F

30°F

| 38.1

31.5

24.8

| 7.85

3.24

1.71

| .67

.13

.04

| 109.7°F

101.1°F

92.4°F

| ****

1/20

| ****

1150

| ****

706

| ****

727

| II

77

| 10°F

20°F

30°F

| 58.7

48.4

38.1

| 12.11

4.99

2.62

| .98

.18

.05

| 105.1°F

97.2°F

89.3°F

| ****

1/20

| ****

1550

| ****

1200

| ****

1220

| II

77*

| 10°F

20°F

30°F

| 46.5

38.5

30.5

| 9.59

3.97

2.09

| .63

.12

.03

| 110.0°F

101.2°F

92.7°F

| ****

1/20

| ****

1150

| ****

858

| ****

894

| II

104

| 10°F

20°F

30°F

| 77.2

68.3

59.3

| 15.91

7.03

4.08

| 2.06

.44

.16

| 106.6°F

101.2°F

95.8°F

| ****

1/8

| ****

1070

| ****

1528

| ****

980

| II

104*

| 10°F

20°F

30°F

| 63.7

56.5

49.2

| 13.13

5.82

3.38

| 1.43

.31

.11

| 108.6°F

103.1°F

97.6°F

| ****

1/8

| ****

850

| ****

1208

| ****

783

| II

125

| 10°F

20°F

30°F

| 94.9

83.7

72.5

| 19.55

8.63

4.98

| 3.04

.65

.23

| 108.9°F

103.1°F

97.3°F

| ****

1/6

| ****

1100

| ****

1790

| ****

1170

| III
144| 10°F

20°F

30°F

| 117.6

105.2

92.8

| 24.24

10.84

6.38

| 4.32

.96

.36

| 108.8°F

103.7°F

98.5°F

| 1/6| 1100| 2220| 1045| III

Performance based on 200°F EWT, 20°F TD, 60°F EAT. Performance at 10°F & 30°F TD is also shown.

For capacities at other conditions, use the correction multipliers in the tables on page 22.

Speed controller option is required for reduced ratings.
† Motor HP listed is applicable to standard motor type only. For explosion proof motor HP, see unit installation manual.

Hot Water Performance Data — Table 19**

STANDARD OUTPUT UNITS

Unit Size| Water Temp Drop| Output MBH| ****

GPM

| H 2 O

Pressure Drop

| Final Air Temp| Motor HP †| Motor RPM| Nominal CFM| Outlet Velocity| Sound Rating
---|---|---|---|---|---|---|---|---|---|---

164

| 10°F

20°F

30°F

| 132.4

118.6

104.8

| 27.29

12.22

7.20

| 3.67

.81

.30

| 106.6°F

101.7°F

96.9°F

| 1/6| ****

1100

| 2620| 1230| IV

200

| 10°F

20°F

30°F

| 156.2

139.7

123.2

| 32.20

14.40

8.47

| 5.02

1.11

.41

| 105.0°F

100.2°F

95.5°F

| 1/4| ****

1100

| ****

3200

| ****

1495

| ****

III

237

| 15°F

20°F

30°F

| 188.9

180.1

162.7

| 25.95

18.56

11.18

| 3.92

2.10

.82

| 101.8°F

99.9°F

96.0°F

| 1/4| ****

1100

| ****

4162

| ****

1205

| ****

IV

285

| 15°F

20°F

30°F

| 215.4

205.4

185.3

| 29.60

21.17

12.73

| 5.02

2.68

1.04

| 104.8°F

102.7°F

98.5°F

| 1/2| ****

1100

| ****

4430

| ****

1275

| ****

IV

317

| 15°F

20°F

30°F

| 254.9

242.9

218.9

| 35.03

25.03

15.04

| 6.88

3.67

1.42

| 105.1°F

103.0°F

98.7°F

| 3/4| ****

1140

| ****

5210

| ****

1500

| ****

IV

367

| 15°F

20°F

30°F

| 294.7

280.8

253.1

| 40.49

28.94

17.39

| 6.60

3.52

1.36

| 104.2°F

102.2°F

98.0°F

| 3/4| ****

1140

| ****

6140

| ****

1770

| ****

IV

495

| 15°F

20°F

30°F

| —

368.1

333.6

| —

37.93

22.92

| —

5.81

2.29

| —

102.3°F

98.3°F

| 1-1/2| ****

1160

| ****

8020

| ****

1640

| ****

IV

585

| 15°F

20°F

30°F

| 451.2

431.1

391.0

| 62.00

44.43

26.86

| 8.78

4.72

1.86

| 104.0°F

102.0°F

98.1°F

| 1-1/2| ****

1160

| ****

9450

| ****

1930

| ****

IV

700

| 15°F

20°F

30°F

| —

519.4

470.9

| —

53.52

32.35

| —

5.29

2.08

| —

103.5°F

99.5°F

| 3| ****

1165

| ****

11,000

| ****

2250

| ****

IV

Performance based on 200°F EWT, 20°F TD, 60°F EAT. Performance at 10°F & 30°F TD is also shown.

For capacities at other conditions, use the correction multipliers in the tables .
† Motor HP listed is applicable to standard motor type only. For explosion proof motor HP, see unit installation manual.

Hot Water Performance Data — Table 20**

LOW OUTPUT UNITS
STANDARD VERTICAL UNITS WITH ALL AIR PORTS OPEN

Unit Size| Water Temp Drop| Output MBH| ****

GPM

| H 2 O

Pressure Drop

| Final Air Temp| Motor HP †| Motor RPM| Nominal CFM| Outlet Velocity| Sound Rating
---|---|---|---|---|---|---|---|---|---|---

40L

| 10°F

20°F

30°F

| 23.9

18.9

14.0

| 4.92

1.95

.96

| .26

.04

.01

| 92.9°F

86.1°F

79.3°F

| ****

1/40

| ****

1550

| ****

668

| ****

950

| ****

I

40L*

| 10°F

20°F

30°F

| 16.7

13.5

—

| 3.45

1.39

—

| .13

.02

—

| 92.8°F

86.4°F

—

| ****

1/40

| ****

1150

| ****

470

| ****

672

| ****

I

62L

| 10°F

20°F

30°F

| 41.5

34.2

27.0

| 8.56

3.53

1.85

| .80

.15

.04

| 91.9°F

86.3°F

80.7°F

| ****

1/20

| ****

1550

| ****

1200

| ****

1190

| ****

II

62L*

| 10°F

20°F

30°F

| 32.4

26.9

21.3

| 6.68

2.77

1.46

| .50

.09

.03

| 94.7°F

88.7°F

82.8°F

| ****

1/20

| ****

1150

| ****

862

| ****

858

| ****

II

77L

| 10°F

20°F

30°F

| 48.9

40.5

32.0

| 10.09

4.17

2.20

| .69

.13

.04

| 93.2°F

87.4°F

81.7°F

| ****

1/20

| ****

1550

| ****

1360

| ****

1350

| ****

II

77L*

| 10°F

20°F

30°F

| 38.5

32.0

25.4

| 7.94

3.29

1.75

| .44

.08

.02

| 95.7°F

89.6°F

83.5°F

| ****

1/20

| ****

1150

| ****

995

| ****

992

| ****

II

104L

| 10°F

20°F

30°F

| 63.7

56.5

49.2

| 13.13

5.82

3.38

| 1.43

.31

.11

| 93.5°F

89.7°F

85.9°F

| ****

1/8

| ****

1070

| ****

1752

| ****

1050

| ****

II

104L*

| 10°F

20°F

30°F

| 54.5

48.5

42.4

| 11.24

4.99

2.91

| 1.06

.23

.08

| 93.5°F

89.8°F

86.1°F

| ****

1/8

| ****

850

| ****

1499

| ****

827

| ****

II

125L

| 10°F

20°F

30°F

| 83.7

73.9

64.2

| 17.24

7.62

4.41

| 2.40

.51

.18

| 95.4°F

91.3°F

87.1°F

| ****

1/6

| ****

1100

| ****

2180

| ****

1390

| ****

III

144L

| 10°F

20°F

30°F

| 95.4

85.5

75.6

| 19.66

8.81

5.20

| 2.92

.65

.24

| 97.3°F

93.4°F

89.5°F

| ****

1/6

| ****

1100

| ****

2360

| ****

1080

| ****

III

Performance based on 200°F EWT, 20°F TD, 60°F EAT. Performance at 10°F & 30°F TD is also shown.

For capacities at other conditions, use the correction multipliers in the tables .

Speed controller option is required for reduced ratings.
† Motor HP listed is applicable to standard motor type only. For explosion proof motor HP, see unit installation manual.

Hot Water Performance Data — Table 21**

Unit Size| Water Temp Drop| Output MBH| ****

GPM

| H 2 O

Pressure Drop

| Final Air Temp| Motor HP †| Motor RPM| Nominal

CFM

| Outlet Velocity| Sound Rating
---|---|---|---|---|---|---|---|---|---|---

164L

| 10°F

20°F

30°F

| 112.3

100.7

89.2

| 23.15

10.38

6.13

| 2.70

.60

.22

| 95.4°F

91.8°F

88.1°F

| ****

1/6

| ****

1100

| ****

2920

| ****

1340

| ****

IV

200L

| 10°F

20°F

30°F

| 135.8

121.8

107.3

| 27.98

12.52

7.37

| 3.85

.85

.32

| 96.9°F

93.0°F

89.2°F

| ****

1/4

| ****

1100

| ****

3390

| ****

1560

| ****

III

237L

| 10°F

20°F

30°F

| 168.5

153.8

139.1

| 34.72

15.85

9.56

| 6.75

1.56

.61

| 94.5°F

91.4°F

88.4°F

| ****

1/4

| ****

1100

| ****

4507

| ****

1270

| ****

IV

285L

| 10°F

20°F

30°F

| 188.9

180.1

162.7

| 25.95

18.56

11.18

| 3.92

2.10

.82

| 94.5°F

92.9°F

89.7°F

| ****

1/2

| ****

1100

| ****

5040

| ****

1420

| ****

IV

317L

| 10°F

20°F

30°F

| 220.9

210.6

189.9

| 30.35

21.70

13.05

| 5.26

2.81

1.09

| 95.7°F

94.1°F

90.7°F

| ****

3/4

| ****

1140

| ****

5700

| ****

1610

| ****

IV

367L

| 10°F

20°F

30°F

| 260.7

248.5

224.2

| 35.82

25.61

15.40

| 5.24

2.80

1.09

| 96.4°F

94.7°F

91.3°F

| ****

3/4

| ****

1140

| ****

6600

| ****

1870

| ****

IV

495L

| 10°F

20°F

30°F

| —

310.5

281.7

| —

32.00

19.35

| —

4.23

1.67

| —

90.5°F

87.7°F

| ****

1-1/2

| ****

1160

| ****

9380

| ****

1860

| ****

IV

585L

| 10°F

20°F

30°F

| 394.4

377.0

342.2

| 54.19

38.85

23.51

| 6.83

3.68

1.45

| 95.3°F

93.7°F

90.6°F

| ****

1-1/2

| ****

1160

| ****

10,300

| ****

2060

| ****

IV

700L

| 10°F

20°F

30°F

| —

453.7

411.7

| —

46.76

28.28

| —

4.11

1.62

| —

95.1°F

91.9°F

| ****

3

| ****

1165

| ****

11,900

| ****

2380

| ****

IV

Performance based on 200°F EWT, 20°F TD, 60°F EAT. Performance at 10°F & 30°F TD is also shown.
For capacities at other conditions, use the correction multipliers in the tables on page 22.
† Motor HP listed is applicable to standard motor type only. For explosion proof motor HP, see unit installation manual.

Vertical Unit Heaters Hot Water Calculations and Correction Factors

| ****

EXAMPLE: –

UNIT SIZE: __ 40

Entering Water Temp. 160°F Entering Air Temp. 40°F Water Temperature Drop __ 10°F

---|---
I. CAPACITY @ 20 °F TD:

A. For 200°F EWT, 60°F EAT

| ****

Read output directly from Tables 18 – 21, 22,700 BTU/HR (Ref., Std. Unit Size 40, p. 18)

|
B. For EWT and/or EAT above or below Standard| Multiply output from Tables 18 – 21

by factor from Table 22 (below)

| ****

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

II. CAPACITY AT OTHER TD’s

A. For TD’s from 5 to 60°F

| Multiply output obtained in IA or IB

(above) by appropriate factor from Table 23

(below)

| IA – 22,700 x 1.15 = 26,105 BTU/HR

– OR –

IB – 19,931 x 1.15 = 22,921 BTU/HR

III. GPM AT OTHER TD’s

A. For TD’s from 5 to 60°F

| Multiply GPM of unit for 20°F TD, from Table 18

by appropriate factor from Table 23 (below)

| 2.34 x 2.30 = 5.38 GPM (Applies only to units with Std 200°F EWT, 60°F EAT) For all others calculate using formula – GPM = BTU

500 x TD

IV. PRESSURE LOSS AT OTHER TD’s

A.For TD’s from 5 to 60°F

| Multiply PD of unit for 20°F TD, from Tables 18 – 21

by appropriate factor from Table 23 (below)

| ****

.06 x 5.00 = .30 Ft. H2O

Table 22 — HOT WATER CONVERSION FACTORS BASED ON 200°F ENTERING WATER 60°F ENTERING AIR 20°F TEMPERATURE DROP

ENTERING AIR

TEMPERATURE

| ENTERING WATER TEMPERATURE — 20°F WATER TEMPERATURE DROP
---|---
100°F| 120°F| 140°F| 160°F| 180°F| 200°F| 220°F| 240°F| 260°F| 280°F| 300°F
30°F| 0.518| 0.666| 0.814| 0.963| 1.120| 1.268| 1.408| 1.555| 1.702| 1.850| 1.997
40°F| 0.439| 0.585| 0.731| 0.878| 1.025| 1.172| 1.317| 1.464| 1.609| 1.755| 1.908
50°F| 0.361| 0.506| 0.651| 0.796| 0.941| 1.085| 1.231| 1.375| 1.518| 1.663| 1.824
60°F| 0.286| 0.429| 0.571| 0.715| 0.857| 1.000| 1.143| 1.286| 1.429| 1.571| 1.717
70°F| 0.212| 0.353| 0.494| 0.636| 0.777| 0.918| 1.060| 1.201| 1.342| 1.483| 1.630
80°F| 0.140| 0.279| 0.419| 0.558| 0.698| 0.837| 0.977| 1.117| 1.257| 1.397| 1.545
90°F| 0.069| 0.207| 0.345| 0.483| 0.621| 0.759| 0.897| 1.035| 1.173| 1.311| 1.462
100°F| 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°F entering water, 60°F entering air) by the proper constant from the above tables.

Table 23 — HOT WATER BTU, GPM AND PRESSURE LOSS FACTORS BASED ON STANDARD CONDITIONS OF 200°F ENTERING WATER 60°F ENTERING AIR & 20°F WATER DROP

USE FACTORS FROM THIS TABLE TO OBTAIN APPROXIMATE RESULTS	TEMPERATURE DROP
5°F	10°F

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

1.25

| ****

1.15

| ****

1.08

| ****

1.00

| ****

.94

| ****

.90

| ****

.83

| ****

.76

| ****

.72

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

5.00

| ****

2.30

| ****

1.44

| ****

1.00

| ****

.74

| ****

.59

| ****

.40

| ****

.30

| ****

.24

To obtain Pressure Loss Feet of Water for other temperature Drops, multiply Basic loss at 20°F drop by Factor.| ****

10.00

| ****

5.00

| ****

2.00

| ****

1.00

| ****

.60

| ****

.40

| ****

.20

| ****

.13

| ****

.07

Table 24 — MINIMUM WATER FLOW — GPM

UNIT SIZE	40	62	77	104	144	164	200	237	317	367
MIN. GPM	.55	.55	.55	.55	.82	.82	1.10	1.10	1.10	1.10

Table 25 — 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

Vertical Unit Heaters Dimensional Data

Table 25 – FIGURE 6 — ROUGHING IN DIMENSIONAL DATA – MODEL SIZE 40-77

Unit Capacity

(MBH)

| Fan Dia. inches

(mm)

| A

inches

(mm)

| B

inches

(mm)

| C

inches

(mm)

| D

inches

(mm)

| E

inches

(mm)

| F

inches

(mm)

| G

inches

(mm)

| H

inches

(mm)

| K

inches

(mm)

| L

Min inches

(mm)

| P NPT

inches

(mm)

| R

inches

(mm)

| S

inches

(mm)

| T

inches

(mm)

| U

inches

(mm)

| V

inches

(mm)

| Approx. Ship Wt. lbs

(kg)

---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---
40| 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| 32
(286)| (464)| (117)| (32)| (298)| (19)| (102)| (279)| (35)| (48)| (178)| (38)| (92)| (168)| (70)| (279)| (92)| (15)
62| 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| 40
(343)| (540)| (117)| (41)| (356)| (25)| (102)| (356)| (35)| (48)| (178)| (38)| (92)| (181)| (70)| (356)| (92)| (18)
77| 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| 43
(343)| (540)| (156)| (41)| (356)| (25)| (76)| (356)| (35)| (48)| (178)| (38)| (92)| (219)| (70)| (356)| (92)| (20)

Table 26 – FIGURE 7 — ROUGHING IN DIMENSIONAL DATA – MODEL SIZE 104-700

Unit Capacity

(MBH)

| Fan Dia. inches

(mm)

| A

inches

(mm)

| B

inches

(mm)

| C

inches

(mm)

| D

inches

(mm)

| E

inches

(mm)

| F

inches

(mm)

| G

inches

(mm)

| H

inches

(mm)

| K

inches

(mm)

| L

Min inches

(mm)

| P NPT

inches

(mm)

| R

inches

(mm)

| S

inches

(mm)

| T

inches

(mm)

| U

inches

(mm)

| V

inches

(mm)

| Approx. Ship Wt. lbs

(kg)

---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---
104| 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| 63
(425)| (641)| (156)| (51)| (445)| (29)| (76)| (432)| (35)| (70)| (178)| (38)| (105)| (232)| (70)| (432)| (105)| (29)
125| 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| 64
(425)| (641)| (156)| (51)| (445)| (44)| (76)| (432)| (35)| (70)| (178)| (38)| (105)| (248)| (70)| (432)| (105)| (29)
144| 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| 80
(502)| (749)| (156)| (60)| (524)| (32)| (102)| (521)| (44)| (89)| (178)| (51)| (114)| (244)| (70)| (521)| (114)| (36)
164| 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| 80
(502)| (749)| (156)| (60)| (524)| (44)| (102)| (521)| (44)| (89)| (178)| (51)| (114)| (257)| (70)| (521)| (114)| (36)
200| 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| 86
(502)| (749)| (194)| (60)| (524)| (51)| (102)| (521)| (44)| (89)| (178)| (51)| (114)| (305)| (70)| (521)| (114)| (39)
237| 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| 134
(641)| (953)| (194)| (76)| (670)| (25)| (89)| (711)| (44)| (89)| (178)| (51)| (121)| (295)| (70)| (457)| (248)| (61)
285| 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| 139
(641)| (953)| (194)| (76)| (670)| (32)| (89)| (711)| (44)| (89)| (178)| (51)| (121)| (298)| (70)| (457)| (248)| (63)
317| 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| 139
(641)| (953)| (194)| (76)| (670)| (54)| (102)| (711)| (44)| (89)| (178)| (51)| (121)| (324)| (70)| (457)| (248)| (63)
367| 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| 146
(641)| (953)| (232)| (76)| (670)| (51)| (89)| (711)| (44)| (89)| (178)| (51)| (121)| (359)| (70)| (457)| (248)| (66)
495| 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| 294
(775)| (1067)| (232)| (89)| (794)| (41)| (76)| (762)| (57)| (108)| (178)| (64)| (152)| (362)| (76)| (762)| (152)| (133)
585| 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| 307
(775)| (1067)| (308)| (89)| (794)| (54)| (76)| (762)| (57)| (108)| (178)| (64)| (152)| (451)| (76)| (762)| (152)| (139)
700| 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| 366
(775)| (1067)| (346)| (89)| (794)| (76)| (102)| (762)| (57)| (108)| (178)| (64)| (152)| (514)| (76)| (762)| (152)| (166)

Table 27 – FIGURE 8
LOUVER CONE DIFFUSER ROUGHING-IN DIMENSIONS

Unit

Size

| ****

A

| ****

B

| ****

C

| ****

D

| Number of

Louvers

---|---|---|---|---|---
40| 161/2| 141/4| 61/2| 25/8| 8
62 & 77| 201/4| 171/8| 81/2| 31/8| 8
104 & 125| 241/4| 21 8| 93/4| 315/16| 8
144, 164 & 200| 283/8| 243/4| 111/2| 45/8| 8
237, 285, 317 & 367| 351/2| 311/2| 133/4| 45/8| 12
495, 585, 700| 411/2| 371/4| 171/2| 43/4| 12

Vertical Unit Heaters Mounting Heights & Throws, Technical Data — Table 28

MAXIMUM MOUNTING HEIGHT IN FEET FOR VERTICAL UNIT HEATERS WITH AND WITHOUT LOUVER CONE DIFFUSER

Unit Size| Steam Pressure (PSI)| Unit Size| Steam Pressure (PSI)
---|---|---|---
2| 5| 10| 50| 75| 2| 5| 10| 50| 75
40| 10.5

12.5

| 10.0

12.0

| 10.0

12.0

| 9.0

11.0

| 8.0

10.0

| 144L| 18.0

22.5

| 17.5

22.0

| 17.5

21.5

| 15.0

18.5

| 14.0

18.0

40*| 8.0

9.0

| 8.0

8.5

| 8.0

8.5

| 8.0

8.0

| 8.0

8.0

| 164| 18.0

22.5

| 17.5

22.0

| 17.0

21.5

| 14.5

19.0

| 14.0

18.0

40L| 12.5

14.5

| 12.0

14.0

| 12.0

13.5

| 10.5

12.0

| 9.5

11.5

| 164L| 22.0

27.5

| 21.5

27.0

| 21.0

26.5

| 18.5

23.5

| 17.5

22.5

40L*| 9.0

10.5

| 8.5

10.0

| 8.5

10.0

| 8.0

9.0

| 8.0

8.5

| 200| 22.0

27.5

| 21.5

27.0

| 21.0

26.5

| 18.5

24.0

| 17.5

23.0

62| 12.0

14.5

| 11.5

14.0

| 11.5

14.0

| 10.0

12.0

| 9.5

11.5

| 200L| 25.5

31.5

| 25.0

31.0

| 24.5

30.5

| 22.0

27.0

| 21.0

26.0

62*| 9.5

11.5

| 9.0

11.0

| 9.0

11.0

| 8.0

9.5

| 8.0

9.0

| 237| 20.0

25.0

| 19.5

24.0

| 19.0

23.5

| 17.0

20.5

| 16.0

19.5

62L| 15.0

19.0

| 14.5

18.5

| 14.5

18.5

| 12.5

16.5

| 12.0

16.0

| 237L| 24.0

29.5

| 23.5

28.5

| 23.0

28.0

| 20.0

24.5

| 19.0

23.5

62L*| 11.5

14.0

| 11.0

13.5

| 11.0

13.5

| 9.5

12.0

| 8.0

11.5

| 285| 21.0

26.0

| 20.5

25.5

| 20.0

25.0

| 17.5

22.0

| 17.0

21.0

77| 15.0

18.5

| 14.5

18.0

| 14.0

17.5

| 12.0

15.5

| 11.5

13.5

| 285L| 25.5

32.0

| 25.0

31.0

| 24.5

30.0

| 21.0

26.0

| 20.0

25.0

77*| 11.0

13.5

| 10.5

13.0

| 10.5

13.0

| 9.0

11.5

| 8.5

11.0

| 317| 24.0

30.0

| 23.0

29.0

| 22.0

28.0

| 20.0

25.0

| 19.0

24.0

77L| 18.0

22.0

| 17.5

21.0

| 17.5

21.0

| 15.0

19.0

| 14.0

18.0

| 317L| 29.0

36.0

| 28.5

35.0

| 28.0

34.0

| 25.0

30.0

| 24.0

29.0

77L*| 13.0

17.0

| 12.5

16.5

| 12.0

16.0

| 11.0

14.0

| 10.5

13.5

| 367| 28.5

35.5

| 28.0

35.0

| 27.5

34.0

| 24.0

30.0

| 23.0

29.0

104| 14.0

17.0

| 13.5

16.5

| 13.0

16.0

| 11.5

14.0

| 11.0

13.5

| 367L| 32.5

41.0

| 31.5

40.0

| 30.5

39.0

| 27.5

35.0

| 26.5

33.5

104*| 11.0

13.5

| 10.5

13.0

| 10.5

13.0

| 9.5

12.0

| 9.0

11.5

| 495| 29.5

36.5

| 29.0

36.0

| 28.5

35.5

| 25.0

32.0

| 24.0

30.5

104L| 17.5

21.5

| 17.0

21.0

| 16.5

20.5

| 15.0

18.5

| 14.5

17.5

| 495L| 35.0

43.5

| 34.0

42.5

| 33.0

41.5

| 29.0

35.0

| 28.0

34.0

104L*| 15.0

18.5

| 14.5

18.0

| 14.5

18.0

| 13.0

16.0

| 12.5

15.0

| 585| 34.0

42.5

| 33.0

41.5

| 32.0

40.5

| 28.0

36.0

| 27.0

34.5

125| 16.0

19.5

| 15.5

19.0

| 15.5

18.5

| 14.0

17.0

| 13.5

16.0

| 585L| 37.0

46.5

| 36.0

45.5

| 35.0

44.5

| 31.0

39.0

| 30.0

37.0

125L| 21.0

26.0

| 20.5

25.5

| 20.0

25.0

| 17.5

22.5

| 17.0

21.5

| 700| 38.5

48.0

| 37.5

47.0

| 36.5

46.0

| 32.0

40.0

| 30.5

39.0

144| 15.5

19.0

| 15.0

18.5

| 14.5

18.0

| 13.0

16.0

| 12.0

15.5

| 700L| 42.5

53.0

| 41.5

52.0

| 40.5

51.0

| 35.0

44.0

| 33.5

42.0

NOTES:

- = Low Speed
L = Vertical low output model with all air ports open

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

To meet ETL and OSHA requirements, units mounted below 8 feet from floor must be equipped with an OSHA fan guard. Please see page 28 for ordering information.

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.

Mounting Height Correction Factors

Water °F	150	160	170	180	190	200
Temperature	(°C)	(66)	(71)	(77)	(82)	(88)

Steam

Pressure

| PSI| —| —| —| —| —| —
(kPa)| —| —| —| —| —| —
Correction Factor| 1.32| 1.27| 1.23| 1.18| 1.14| 1.09
Water

Temperature

| °F| 210| 219| 227| 239| 250| 259
---|---|---|---|---|---|---|---
(°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

Temperature

| °F| 267| 280| 287| 298| 307| 320
---|---|---|---|---|---|---|---
(°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

MAXIMUM SPREAD IN FEET

Unit Size:| 40| 62| 77| 104| 125| 144| 164| 200| 237| 285| 317| 367| 495| 585| 700
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---
Spread (Ft.)| 15| 17| 20| 24| 26| 27| 28| 32| 35| 37| 45| 50| 54| 57| 60

NOTE: The “spread” is the diameter of the comfort zone at floor level. Projected by the vertical unit without the louver cone diffuser. Based on two pounds steam pressure and 60°F entering air.

TECHNICAL DATA
Propylene Glycol, when sizing equipment for systems that will utilize a Propylene Glycol solution consider the factors shown .

Vertical Unit Heaters Motor Characteristics
Table 29 – TOTALLY ENCLOSED MOTOR TYPE

Table 30 – EXPLOSION PROOF WITH THERMAL OVERLOAD MOTOR TYPE

Optional variable speed switch is available.
These motors have automatic thermal overload protection or impedance protection.

† These motors are without thermal overload protection. Motors without thermal overload protection must be installed with the optional manual starter or other field provided overload protection.
‡ These motors are 230/460 volts only.

NOTE

All motors are constant speed and operate at top speed as indicated in motor data. Models through 1/8 HP 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. Sizes 164 through 700 operate at constant speed as indicated in motor data.
Stated draw is full load amps (FLA). AMP draw varies by motor manufacturer ± .2 AMPS.
Models 317 through 700 are not available for either Totally Enclosed or Explosion Proof with Overload 115/1/60 motor types.

CAUTION: 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.

Horizontal and Vertical Unit Heater

Piping and Installation
The illustrations below depict different typical piping configurations. Proper selection should be based on the operational characteristics of the source supply. For selection and sizing of piping, traps, filters and other piping specialities, ASHRAE guides and specialty manufacturer’s literature should be consulted. We assume that the type and total design of systems has been selected or approved by a qualified engineer. The installation and service manual should be consulted for further information on installation, operation, drainage and system cleaning.

Piping and installation is typical for both horizontal and vertical unit heaters – except side connections Figure 13.

Wiring Diagrams

Figure 14

For internal wiring and overload protection on all starters, consult the control manufacturer for details.
When using thermostatic control with a manual starter, be sure that the electrical rating of the thermostat is sufficient to carry the motor current.
Refer to pages 13 and 25 for motor characteristics of individual unit heaters.

Warranty

STEAM/HOT WATER UNIT HEATER WARRANTY
The products in this catalog are warranted by the manufacturer to be free from defects in material and workmanship for a period of one (1) year from the date of shipment from the manufacturer’s plant. The manufacturer’s liability under this warranty is limited to replacing or repairing at our option, F.O.B. our plant any defective component or assembly returned to our factory prepaid and with proper return authorization documents. All repairs or replacements are made subject to factory inspection. No liability is accepted for consequential damages, freight or labor charges.

This warranty does not cover damages or failure due to improper installation or piping, corrosive atmospheric conditions, misuse or negligence by others.

TERMS OF SALE

No obligation is assumed by this corporation to sell to anyone holding this book any of the items listed herein.
An order is not a valid order until acknowledged by the manufacturer.
The manufacturer reserves the right to make changes in design, material or accessory vendors without notice and without obligation to incorporate such changes in products of prior manufacture.
Additional sales and freight terms are contained in the price list.

Horizontal
Hydronic Unit Heaters
Model Number Description

Vertical
Hydronic Unit Heaters
Model Number Description

HVAC PRODUCTS
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413-564-5540
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