Trane DFOA User Manual

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Make-Up Air Units

Dir ect-Fired Outdoor Model DFO A

September 2000

MU A-PR C001 -EN

Introduction

Why Use Trane Make-Up Air Units?

To help relieve negative pressure inside commercial and industrial facilities, such as factories, garages, pac king plants, kitchens, bowling alleys, and welding and foundry areas. Trane’s make-up air units offer a wide range of cfm, from 1,600 to 64,000, and gas-fired burners with capacities from 131,000 Btuh to 7,748,000 Btuh. These ranges of fer excellent variety when selecting a unit that will fill both the owner’s needs and those of the specifying engineer. These units are flexible in that they can be located indoors or outdoors, and either curb or grade mounted.

All standard units include the necessary controls for operation, such as a flame safeguard, an air proving differential switch, a high temperature limit switc h, and an ignition transformer. Component parts are of the highest quality . Eac h unit has overlapping, fail-safe protection devices to handle failures should they occur. Eac h unit is factory tested before it ships, and is designed to provide years of reliable, low maintenance operation.

Units are built with UL approved components, where applicable. Special gas controls can be furnished to comply with FM or IRI requirements.

©American Standard Inc. 2000

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Contents

Introduction Featur es and Benefits

Unit Configurations

Application Considerations

Model Number Description

P erformance Data

Gas Piping

Controls Electric P o wer Dimension and Weights Mechanical Specifications

Options Accessories

2 4

6 7

8 9

16 18

19 36

37 43

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Supply air intake view showing inlet hood

and birdscreen

Features and Benefits

Gas burner section

Optional inlet damper wtih V-bank filter

Factory assembled g as manifold

compartment

Access compartment t o contr ol panel and

fan motor.

Note: Fan motor panel has been removed for photograph.

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Features and Benefits

Basic Unit

Feature:

Casing with galvanized finish

Benefit:

Rust problem is greatly reduced

Feature:

Water tight construction

Benefit:

Designed for indoor or outdoor mounting

Feature:

Access doors are hinge mounted with industrial type hardware

Benefit:

Provides simple access to service compartments without removing sheet metal screws and panels

Feature:

Adjustable motor mount

Benefit:

Belt tension can be field adjusted for maximum belt life and for motor speed adjustment

Feature:

Basic unit is factory assembled and wired

Benefit:

Reduces field installation cost

Gas-Fired Unit

Feature:

Many standard, natural gas burning units bear the ETL label. Contact

factory for verification. Benefit:

Meets certain insurance requirements

Feature: Optional temperature control systems

available

Benefit:

Select system to satisfy application

Feature: Optional dual fuel gas manifold Benefit:

Standby flexibility in case natural gas supply is interrupted

Feature: Optional construction provides return

air cycle

Benefit:

Maximum 80 percent return air cycle results in fuel economy for pressurized heating systems and eliminates need for two-speed fan operation. Minimizes heating costs.

Feature:

All fuses factory furnished

Benefit:

Delay at start-up eliminated

Feature:

Factory tested before being shipped

Benefit:

Eliminates majority of field start-up problems caused by defective controls

Feature:

No flues or stacks are used

Benefit:

Eliminates backdraf t and dangerous contaminants from entering the space

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Horiz ontal Configurations

For all arrangements shown, the g as piping and controls are on the near side. Selected horizontal units are available with special options — cooling coils (DX, chilled water), steam and electric coils, no burner section.

Unit Configurations

V er tical Configurations

For all arrangements shown, the g as piping and controls are on the near side. The electric control cabinet (EC) and disconnect are on the side opposite the air entering side. Selected vertical units are available with special options — steam and electric coils, no burner section.

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Application Considerations

Outdoor Units

Outdoor make-up air units are the most common approach to relieving negative pressure inside commercial and industrial facilities. All units of fer the advantage of a full support system that is watertight, pro vides a plenum for return air, and has easily accessible piping and electrical connections.

The Need for Make-Up Air Units

When more air is exhausted from a building than is supplied by the mechanical systems, the building is under a “negative” condition. Air will leak into the building through cracks, windows, and doors. When a negative condition exists:

Flues and stacks may experience a backdraf t and cause dangerous contaminants to remain in the occupied space. In the case of flues, the products of combustion may condense and corrode the equipment.

Under negative conditions, the exhaust system sees a greater static pressure. The capacity of each fan is reduced and this results in an inadequate removal of contaminants.

Drafts and cross-currents will increase in a negative condition, causing an uncomfortable or unhealthy work environment.

What Fuel to Use?

The most common fuel for heating make-up air is natural gas. This is because 100 percent of the energy goes into the air stream (92 percent sensible, 8 percent latent). Direct firing eliminates the need for heat exchangers or combustion chambers that can corrode or leak. Natural gas is often the least expensive fuel and is usually readily available.

Note: Select ed hor iz ontal and ver tical units are av ailable with special coil options (DX, chilled w at er, st eam or electric).

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Digits 1,2,3 — Unit Description

DFO = Direct Fired Outdoor Unit

Digit 4 — Development Sequence

A = First Generation

Digits 5,6,7 — Unit Size

109 = Unit Size 109 112 = Unit Size 112 115 = Unit Size 115 118 = Unit Size 118 215 = Unit Size 215 218 = Unit Size 218 220 = Unit Size 220 222 = Unit Size 222 225 = Unit Size 225 230 = Unit Size 230 SSS = Special Unit Size

Digit 8 — Main Power Supply

0 = No Selection A = 115/60/1 B = 230/60/1 C = 208/60/1 D = 208/60/3 E = 230/60/3 F = 460/60/3 S = Special

Digit 9 — Fuel

N = Natural Gas P = LP Gas (Propane) S = Special

Digit 10 — Design Sequence

C = Third Design

Digit 1 1 — Gas Control Option

A = Series 14 Constant Disc harge

Temperature B = Series 44 Space T emperature Control S = Special

Digit 12 — Type Gas Tr ain Approv als

1 = Standard 3 = IRI 4= FM S = Special

Digits 13,14 — Burner Input Rating (MBh)

AA = 275 MBh Input AB = 550 MBh Input AC = 825 MBh Input AD = 990 MBh Input AE = 1 100 MBh Input

Model Number Description

D F O A 1 0 9 A N C A 1 A A B 1 2 0 0 0 A

1,2,3 4 5,6,7 8 9 10 11 12 13,14 15 16 17 18 19 20 21

AF = 1375 MBh Input AG = 1650 MBh Input AH = 1925 MBh Input AJ = 2200 MBh Input AK = 2475 MBh Input AL = 2750 MBh Input AN = 3025 MBh Input AP = 3300 MBh Input AQ = 3575 MBh Input AR = 3850 MBh Input AT = 4125 MBh Input AV = 4400 MBh Input AW = 4675 MBh Input AX = 4950 MBh Input A Y = 5225 MBh Input AZ = 5500 MBh Input A1 = 5775 MBh Input A2 = 6050 MBh Input A3 = 6325 MBh Input A4 = 6600 MBh Input A5 = 6875 MBh Input A6 = 7150 MBh Input A7 = 7425 MBh Input A8 = 7700 MBh Input A9 = 7975 MBh Input SS = Special

Digit 15 — Blower Motor HP

0 = No Selection B = ¾ HP Motor C = 1 HP Motor D = 1½ HP Motor E = 2 HP Motor F = 3 HP Motor G = 5 HP Motor H = 7½ HP Motor J = 10 HP Motor K = 15 HP Motor L = 20 HP Motor M = 25 HP Motor P = 30 HP Motor Q = 40 HP Motor R = 50 HP Motor T = 60 HP Motor S = Special

Digit 16 — Motor Speed and Starter

0 = No Selection 1 = Single Speed ODP 1800 RPM 2 = Single Speed TEFC 1800 RPM 3 = Single Speed Energy Efficient ODP

1800 RPM

4 = Single Speed Energy Efficient TEFC

1800 RPM 5 = 2S1W ODP 1800/900 RPM 6 = 2S2W ODP 1800/1200 RPM S = Special

Digit 17 — Fan Dischar ge* Horizontal Ar rangement

1 = Arrangement 1, T op 2 = Arrangement 2, Side 3 = Ar rangement 3, Bottom

*Select arrangements from page 6.

V ertical Arrang ement

4 = Arrangement 4, Side 5 = Arrangement 5, T op 6 = Arrangement 6, Side

*Select arrangements from page 6.

Digit 18 — Inlet Hood and Birdscreen

0 = None A = Inlet Hood and Birdscreen with

Permanent Filters

B = Inlet Hood and Birdscreen without

Filters

Digit 19 — V-Bank Filt er Section

0 = No Selection A = V-Bank Filter Section with Permanent

Filters

B = V-Bank Filter Section without Filters

Digit 20 — Dampers/Mixing Box

0 = No Selection A = Motorized RA Damper B = Motorized 75/25 Damper C = Mixing Box — Temperature Control D = Mixing Box — Building Pressure

Control

E = Mixing Box — Manual Control

Digit 21 — Miscellaneous Options

A = Controls Opposite from Standard B = Motorized Inlet Damper C = Motorized Outlet Damper D = Insulation on Basic Frame E = Insulation on Filter Section F = Internal Blower/Motor Isolation G = Extended Grease Lines H = Inlet On-Off Duct Stat K = 1 15V Duplex Service Receptacle with

Power Transformer L = Circuit Analyzer M = Painted Basic Unit and Accessories N = UV Flame Sensor P = Clogged Filter Switc h with Light Q = Exhaust Interlock R = Interlocking Relay T = City of Chicago Controls V = Omit Disconnect Switch W= High Gas Pressure Regulator 1-5 PSIG X = High Gas Pressure Regulator 5-1 0 PSIG Y = Adjustable Drive S = Special 8 = Low Gas Pressure Burner

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P erformance Data

Table PD-1 — Direct-Fir ed Outdoor Unit

Models Blower STD Air Outlet ¼” 3/8” ½” ¾” 1” 1 ¼” 1 ½” 2”

DFO Size @ 70 Velocity HP

109 1-9” 2250 2690 1 ½ 1 ½ 1 ½ 22223

112 1-12” 3750 2540 2 2 3 33335

115 1-15” 5000 2430 3 3 3 33555

118 1-18” 7500 2565 5 5 5 5 5 7 ½ 7 ½ 7 ½

215 2-15” 1 0500 2550 5 5 7 ½ 7 ½ 7 ½ 7 ½ 7 ½ —

218 2-18” 14000 2390 7 ½ 7 ½ 7 ½ 10 10 10 15 —

220 2-20” 22000 2620 15 15 1 5 15 15 20 20 20

222 2-22” 28000 2750 15 20 20 20 20 25 25 30

225 2-25” 38000 2835 20 20 20 25 25 30 30 40

230 2-30” 56000 3020 30 30 30 40 40 40 40 50

Notes: External Pressure Drop in inches of water. Add pressure drop of the optional accessories, if used, to the pressure drop of the duct work. Fresh Air Inlet Hood and Birdscreen .13” WC Fresh Air Inlet Hood With Filters .25” WC Motor Operated Inlet Damper .13” WC Motor Operated Discharge Damper .13” WC V-Bank Filter Section .25” WC Mixing Box . 40” WC

CFM FPM T otal External Static Pressure (WC)

1600 1915 ¾11 1 ———— 1800 2155 1 1 1 1 ½ 1 ½ 1 ½ — — 2000 2390 1 ½ 1 1½ 1 ½ 1 ½ 2 2 —

2500 2990 2 2 2 22333 2750 3290 2 2 2 33333 3000 3585 3 3 3 33355 3250 2180 1 ½ 2 2 23333 3500 2360 2 2 2 33335

4000 2720 3 3 3 33355 4250 2900 3 3 3 33555 45002190 223 3335—

5500 2670 3 3 3 55555 60002910 555 55557 ½

65002215 355 55557 ½ 7000 2390 5 5 5 5557 ½7 ½

8000 2740 5 5 5 7 ½ 7 ½ 7 ½ 7 ½ 7 ½ 8500 2915 5 5 7 ½ 7 ½ 7 ½ 7 ½ 7 ½ 10 9000 2190 5 5 5 5 7 ½ — — — 9500 2310 5 5 5 5 7 ½ 7 ½ — —

10000 2430 5 5 5 7 ½ 7 ½ 7 ½ 7 ½ —

11000 2670 7 ½ 7 ½ 7 ½ 7 ½ 7 ½ 7 ½ 10 10

11500 2790 7 ½ 7 ½ 7 ½ 7 ½ 7 ½ 10 10 10 12000 2910 7 ½7 ½7 ½7 ½10101015 12500 2125 7 ½ 7 ½ 7 ½ 7 ½ 7 ½ — — — 13000 2215 7 ½ 7 ½ 7 ½ 7 ½ 10 10 — —

15000 2565 7 ½ 10 10 10 10 15 15 15 16000 2740 101010 1015151515 17000 2915 101010 1515151520 18000 2140 7 ½1010 10151515— 19000 2260 10 10 10 10 15 15 15 — 20000 2380 10 10 10 15 15 15 15 20 21000 2500 101515 1515152020

23000 2740 15 15 15 15 15 20 20 20 24000 2860 15 15 15 1 5 20 20 20 25 25000 2980 15 15 15 20 20 20 20 25 26000 3100 15 20 20 20 20 20 25 25 25000 2450 15 15 15 1 5 20 20 20 25 26000 2550 15 15 15 20 20 20 20 25 27000 2650 15 15 15 20 20 20 20 25

29000 2850 20 20 20 20 25 25 25 30 30000 2950 20 20 20 20 25 25 25 30 31000 3050 20 20 20 25 25 25 30 30 30000 2235 15 15 15 15 20 20 — — 32000 2385 15 15 15 20 20 20 25 — 34000 2535 15 20 20 20 20 25 25 30 36000 2685 20 20 20 20 25 25 30 30

40000 2985 20 25 25 25 30 30 30 40 42000 3135 25 25 25 30 30 40 40 40 44000 3285 25 30 30 30 40 40 40 40 46000 3430 30 30 30 40 40 40 40 50 44000 2365 20 20 20 25 25 30 — — 48000 2580 20 25 25 25 30 30 40 — 52000 2800 252530 3040404050

60000 3240 40 40 40 40 40 50 50 50 64000 3440 40 40 40 50 50 50 50 60

9MUA-PRC001-EN

P erformance Data

Table PD-2 — Direct-Fir ed Outdoor Unit — Bur ner Selection (MBh Input)

Models Std Air 70 F 80 F 90 F 1 00 F 110 F 120 F DFO 70 F Rise Rise Rise Rise Rise Rise

109 2250 185 211 238 264 291 317

112 4000 329 376 423 470 517 563

115 5500 452 517 581 646 710 775

118 8000 657 751 845 939 1033 1127

215 10500 863 986 1 1 09 1233 1356 1479

218 15000 1233 1409 1585 1761 1937 2113

220 22000 1808 2066 2324 2583 2841 3099

222 29000 2383 2723 3064 3404 3745 4085

225 40000 3287 3757 4226 4696 5165 5635

230 56000 4602 5259 5917 6574 7231 —

Notes:

1. Determine the temperature rise required through the heater by subtracting winter design temperature from the desired indoor temperature.

2. Select burner required: BTUH = CFM x T x 1.08

Formula includes 1.08 constant for heat content of air and .92 factor which is an average ratio of net and gross heating values of common fuel gases. (92% sensible, 8% latent).

3. Contact Diversified Commercial Products Technical Support on temperature rise requirements greater than 120 F.

CFM

1600 131 150 169 188 207 225 1800 148 169 190 211 232 254 2000 164 188 211 235 258 282

2500 205 235 264 293 323 352 2750 226 258 291 323 355 387 3000 247 282 317 352 387 423 3250 267 305 343 382 420 458 3500 288 329 370 41 1 452 493 3750 308 352 396 440 484 528

4250 349 399 449 499 549 599 4500 370 423 475 528 581 634 5000 411 470 528 587 646 704

6000 493 563 634 704 775 845 6500 534 610 687 763 839 916 7000 575 657 740 822 904 986 7500 616 704 792 880 968 1057

8500 698 798 898 998 1 098 1197 9000 740 845 951 1057 1 1 62 1268 9500 781 892 1004 11 15 1227 1338

10000 822 939 1 057 1174 1291 1409 11000 904 1033 1162 1291 1420 1550

11500 945 1 080 1215 1350 1485 1620 12000 986 1127 1268 1409 1550 1690 12500 1027 1174 1321 1467 161 4 1761 13000 1068 1221 1373 1526 1679 1831 14000 1150 1 315 1479 1643 1808 1972

16000 1315 1503 1690 1878 2066 2254 17000 1397 1597 1796 1996 21 95 2395 18000 1479 1690 1902 2113 2324 2536 19000 1561 1784 2007 2230 2453 2677 20000 1643 1878 2113 2348 2583 2817 21000 1726 1972 2219 2465 2712 2958

23000 1890 2160 2430 2700 2970 3240 24000 1972 2254 2536 2817 3099 3381 25000 2054 2348 2641 2935 3228 3522 26000 2137 2442 2747 3052 3357 3663 25000 2054 2348 2641 2935 3228 3522 26000 2137 2442 2747 3052 3357 3663 27000 2219 2536 2853 3170 3487 3803 28000 2301 2630 2958 3287 3616 3944

30000 2465 2817 3170 3522 3874 4226 31000 2547 2911 3275 3639 4003 4367 30000 2465 2817 3170 3522 3874 4226 32000 2630 3005 3381 3757 4132 4508 34000 2794 3193 3592 3991 4390 4790 36000 2958 3381 3803 4226 4649 5071 38000 3123 3569 4015 4461 4907 5353

42000 3451 3944 4437 4930 5423 5917 44000 3616 4132 4649 5165 5682 6198 46000 3780 4320 4860 5400 5940 6480 44000 3616 4132 4649 5165 5682 6198 48000 3944 4508 5071 5635 6198 6762 52000 4273 4883 5494 6104 6715 7325

60000 4930 5635 6339 7043 7748 — 64000 5259 601 0 6762 7513 — —

.92

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Gas Piping

Component Identification

GP-09 Pilot Gas Pressure Regulator GP-11 Main Gas Shutoff Valve GP-13 Pilot Gas Shutoff Valve GP-17 Auxiliary Gas Shutoff Valve GP-18 Auxiliary Gas Shutoff Valve GP-27 Orificed Needle Valve VG-0 1 Pilot Gas V alve VG-02 Main Gas Valve VG-03 Auxiliary Gas Valve VG-04 N/O Vent V alve VG-07 Maxitrol Modulating Valve PS-04 Low Gas Pressure Switch PS-07 High Gas Pressure Switch

Notes:

V ents to outside furnished by factory on outdoor units.

Under 825 MBh will require an additional gas pressure regulator if inlet pressure exceeds 1 psig.

4400 MBh and above will require a minimum inlet pressure of 1 psig. For inlet pressure under 1 psig, contact factory.

For inlet pressure under 1 0” WC, contact factory.

Contact factory for manifold required for CGA.

*Items PS-04, PS-07, VG-04 and GP-18 are not required to meet IRI requirements if the unit is ETL approved. Refer to page 40.

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Gas Piping

Table GP-1— Gas Pr essur e Regulator Selection

If Burner Size (BS) Is: And Gas Pressure (GP) Is: Then: BS < 825 GP< 7” WC Call factory to verify availability and pricing

7”WC

< GP < 10” WC Use low gas pressure burner

10”WC

< GP < 1 PSI No low gas pressure burner or high gas pressure regulator required 1 PSI < GP < 5 PSI Use high gas pressure regulator 1-5 PSI 5 PSI < GP 10 PSI < GP 50 PSI < GP Call factory to verify availability and pricing

990 < BS < 4125 GP < 7” W C Call factory to verify availability and pricing

7” WC 10” WC < GP < 5 PSI No low gas pressure burner or high gas pressure regulator required 5 PSI < GP 10 PSI < GP 50 PSI < GP Call factory to verify availability and pricing

4400 < BS < 7975 GP < 1 PSI Call factory to verify availability and pricing

1 PSI 5 PSI < GP < 10 PSI Use high gas pressure regulator 5-10 PSI 10 PSI < GP 50 PSI < GP Call factory to verify availability and pricing

< 10 PSI Use high gas pressure regulator 5-10 PSI

< 50 PSI Use high gas pressure regulator over 10 PSI

< GP < 10” WC Use low gas pressure burner

< 10 PSI Use high gas pressure regulator 5-10 PSI

< 50 PSI Use high gas pressure regulator over 10 PSI

< GP < 5 PSI No low gas pressure burner or high gas pressure regulator required

< 50 PSI Use high gas pressure regulator over 10 PSI

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Gas Piping

Table GP-2 — Gas Pipe Connection Siz e — Dir ect-Fired Units — IRI Gas T rain — R/A Meeting ETL

MBH 6-7" 8-11" 12-14" 15-20" 21-27" 1 psi 2 psi 3 psi 4 psi 5 psi

275 1" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾" 550 1 ¼" 1" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾"

825 2" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,100 2" 1 ¼" 1 ¼" 1 ¼" 1 ¼“ 1 ¼” 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,375 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,650 N/A 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,925 N/A 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,200 N/A 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,475 2 ½" 2" 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,750 3" 2" 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 3,025 3" 2 ½" 2" 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 3,300 N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 3,575 N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 3,850 N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 4,125 N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 4,400 N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 4,675 N/A 3" 2 ½" 2" 2" 2" 2" 2" 2" 2" 4,950 N/A 3" 2 ½" 2" 2" 2" 2" 2" 2" 2" 5,225 N/A 3" 2 ½" 2" 2" 2" 2" 2" 2" 2" 5,500 N/A 3" 2 ½" 2 ½" 2" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 5,775 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,050 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,325 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,600 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,875 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½"

7,150 N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½"

7,700 N/A N/A 3" 2 ½" 2 ½" 3" 3" 3" 3" 3" 8,250 N/A N/A 3" 3" 2 ½" 3" 3" 3" 3" 3" 8,800 N/A N/A N/A 3" 3" 3" 3" 3" 3" 3" 9,350 N/A N/A N/A 3" 3" 3" 3" 3" 3" 3" 9,900 N/A N/A N/A 3" 3" 3" 3" 3" 3" 3"

10,450 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 11,000 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 11,550 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

Inlet Gas Pressure (inches of water column)

Table GP-3 — Gas Pipe Connection Siz e — Dir ect-Fired Units — FM Gas T r ain — R/A Meeting ETL

Inlet Gas Pressure (inches of water column)

MBH 6-7" 8-11" 12-14" 15-20" 21-27" 1 psi 2 psi 3 psi 4 psi 5 psi

275 1" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾" 550 1 ¼" 1" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾"

825 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,100 2" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,375 2" 1 ½" 1 ½" 1 ½" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,650 2" 1 ½" 1 ¼" 1¼" 1¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,925 2" 2" 1 ¼" 1¼" 1¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,200 N/A 2" 1 ½" 1¼" 1¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,475 N/A 2" 1 ½" 1¼" 1¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,750 N/A 2" 2" 1 ½" 1¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 3,025 N/A 2" 2" 1 ½" 1¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 3,300 N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 3,575 N/A 3" 2" 2" 2" 2" 2" 2" 2" 2" 3,850 N/A 3" 2" 2" 2" 2" 2" 2" 2" 2" 4,125 N/A 3" 2" 2" 2" 2" 2" 2" 2" 2" 4,400 N/A 3" 2" 2" 2" 2" 2" 2" 2" 2" 4,675 N/A 3" 2" 2" 2" 2" 2" 2" 2" 2" 4,950 N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 5,225 N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 5,500 N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 5,775 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,050 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,325 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,600 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,875 N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½"

7,150 N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½"

7,700 N/A N/A 3" 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 8,250 N/A N/A 3" 3" 3" 3" 3" 3" 3" 3" 8,800 N/A N/A N/A 3" 3" 3" 3" 3" 3" 3" 9,350 N/A N/A N/A 3" 3" 3" 3" 3" 3" 3" 9,900 N/A N/A N/A 3" 3" 3" 3" 3" 3" 3"

10,450 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 11,000 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 11,550 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

13MUA-PRC001 -EN

Gas Piping

Table GP-4 — Gas Pipe Connection Siz e — Direct-Fir ed Units — Standar d Gas Tr ain — R/A Meeting ETL

MBH 6-7" 8-11" 12-14" 15-20" 21-27" 1 psi 2 psi 3 psi 4 psi 5 psi

275 1" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾" 550 1 ¼" 1" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾"

825 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,100 2" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,375 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,650 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,925 2 ½" 2" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,200 2 ½" 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,475 2 ½" 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,750 2 ½" 2" 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 3,025 2 ½" 2" 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 3,300 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 2" 3,575 3" 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 3,850 3" 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 4,125 N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 4,400 N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 4,675 N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 4,950 N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 5,225 N/A 2 ½" 2 ½" 2" 2" 2" 2" 2" 2" 2" 5,500 N/A 2 ½" 2 ½" 2" 2" 2" 2" 2" 2" 2" 5,775 N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,050 N/A 3 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,325 N/A 3 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,600 N/A 3 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,875 N/A 3 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½"

7,150 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½"

7,700 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 8,250 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 8,800 N/A N/A 3 3 3 3 3 3 3 3 9,350 N/A N/A 3 3 3 3 3 3 3 3 9,900 N/A N/A 3 3 3 3 3 3 3 3

10,450 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 11,000 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 11,550 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

Inlet Gas Pressure (inches of water column)

Table GP-5 — Gas Pipe Connection Siz e — Direct-Fir ed Units — IRI Gas T rain — 100% OA or R/A Not ETL

MBH 6-7" 8-11" 12-14" 15-20" 21-27" 1 psi 2 psi 3 psi 4 psi 5 psi

275 1 ¼" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾" 550 N/A 1" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾"

825 N/A N/A 1" ¾" ¾" ¾" ¾" ¾" ¾" ¾" 1,100 N/A 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,375 N/A 2" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,650 N/A N/A 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,925 N/A N/A 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,200 N/A N/A 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,475 N/A N/A 2" 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,750 N/A N/A 2" 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 3,025 N/A N/A 2" 2" 2" 2" 2" 2" 2" 2" 3,300 N/A N/A 2" 2" 2" 2" 2" 2" 2" 2" 3,575 N/A N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 3,850 N/A N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 4,125 N/A N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 4,400 N/A N/A 2 ½" 2 ½" 2" 2" 2" 2" 2" 2" 4,675 N/A N/A 2 ½" 2 ½" 2" 2" 2" 2" 2" 2" 4,950 N/A N/A 2 ½" 2 ½" 2" 2" 2" 2" 2" 2" 5,225 N/A N/A 3" 2 ½" 2" 2" 2" 2" 2" 2" 5,500 N/A N/A 3" 2 ½" 2 ½" 2" 2" 2" 2" 2" 5,775 N/A N/A 3" 2 ½" 2 ½" 2" 2" 2" 2" 2" 6,050 N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,325 N/A N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,600 N/A N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,875 N/A N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½"

7,150 N/A N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½"

7,700 N/A N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 8,250 N/A N/A N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 8,800 N/A N/A N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 9,350 N/A N/A N/A N/A 3" 3" 3" 3" 3" 3" 9,900 N/A N/A N/A N/A 3" 3" 3" 3" 3" 3"

10,450 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 11,000 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 11,550 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A 12,100 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

Inlet Gas Pressure (inches of water column)

MUA-PRC001-EN14

Gas Piping

Table GP-6 — Gas Pipe Connection Siz e— Direct-Fir ed Units — FM Gas Train — 100% O A or R/A Not ETL

MBH 6-7" 8-11" 12-14" 15-20" 21-27" 1 psi 2 psi 3 psi 4 psi 5 psi

275 1 ¼" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾" 550 N/A 1" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾"

825 N/A 1 ¼" 1" 1" ¾" ¾" ¾" ¾" ¾" ¾" 1,100 N/A 2" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,375 N/A 2" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,650 N/A 2" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,925 N/A 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,200 N/A N/A 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,475 N/A N/A 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,750 N/A N/A 2" 2" 2" 1 ½" 1 ½" 1 ½" 1 ½" 1 ½" 3,025 N/A N/A 2" 2" 2" 2" 2" 2" 2" 2" 3,300 N/A N/A 2" 2" 2" 2" 2" 2" 2" 2" 3,575 N/A N/A 2" 2" 2" 2" 2" 2" 2" 2" 3,850 N/A N/A 2" 2" 2" 2" 2" 2" 2" 2" 4,125 N/A N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 4,400 N/A N/A 3" 2" 2" 2" 2" 2" 2" 2" 4,675 N/A N/A 3" 2 ½" 2" 2" 2" 2" 2" 2" 4,950 N/A N/A 3" 2 ½" 2" 2" 2" 2" 2" 2" 5,225 N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 5,500 N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 5,775 N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,050 N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,325 N/A N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,600 N/A N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,875 N/A N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½"

7,150 N/A N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½"

10,450 N/A N/A N/A N/A 3" 3" 3" 3" 3" 3" 11,000 N/A N/A N/A N/A N/A 3" 3" 3" 3" 3" 11,550 N/A N/A N/A N/A N/A CF CF CF CF CF 12,100 N/A N/A N/A N/A N/A CF CF CF CF CF

Note: CF = Contact Factory

Table GP-7 — Gas Pipe Connection Siz e— Direct-Fir ed Units — Standar d Gas T r ain — 1 00% O A or R/A Not ETL

MBH 6-7" 8-11" 12-14" 15-20" 21-27" 1 psi 2 psi 3 psi 4 psi 5 psi

275 1 ¼" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾" 550 1 ¼" 1" ¾" ¾" ¾" ¾" ¾" ¾" ¾" ¾"

825 N/A N/A 1" 1" ¾" ¾" ¾" ¾" ¾" ¾" 1,100 N/A 2" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,375 N/A 2" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,650 N/A 2" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1,925 N/A N/A 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,200 N/A 2 ½" 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,475 N/A 2 ½" 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 2,750 N/A 2 ½" 2" 1 ½" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 1 ¼" 3,025 N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 2" 3,300 N/A 3" 2" 2" 2" 2" 2" 2" 2" 2" 3,575 N/A 3" 2" 2" 2" 2" 2" 2" 2" 2" 3,850 N/A N/A 2" 2" 2" 2" 2" 2" 2" 2" 4,125 N/A N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 4,400 N/A N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 4,675 N/A N/A 2 ½" 2" 2" 2" 2" 2" 2" 2" 4,950 N/A N/A 2 ½" 2 ½" 2" 2" 2" 2" 2" 2" 5,225 N/A N/A 2 ½" 2 ½" 2" 2" 2" 2" 2" 2" 5,500 N/A N/A 2 ½" 2 ½" 2" 2" 2" 2" 2" 2" 5,775 N/A N/A 2 ½" 2 ½" 2" 2" 2" 2" 2" 2" 6,050 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,325 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,600 N/A N/A 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 6,875 N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½"

7,150 N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½"

7,700 N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 8,250 N/A N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 8,800 N/A N/A N/A 3" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 2 ½" 9,350 N/A N/A N/A 3" 3" 3" 3" 3" 3" 3" 9,900 N/A N/A N/A N/A 3" 3" 3" 3" 3" 3"

10,450 N/A N/A N/A N/A 3" 3" 3" 3" 3" 3" 11,000 N/A N/A N/A N/A 3" 3" 3" 3" 3" 3" 11,550 N/A N/A N/A N/A N/A CF CF CF CF CF 12,100 N/A N/A N/A N/A N/A CF CF CF CF CF

Note: CF=Contact Factory

Inlet Gas Pressure (inches of water column)

15MUA-PRC001 -EN

Controls

System 14 — Constant Discharg e Air Temperatures

ÀÁÂ ÃÄ

Optional

Component Description

1 Remote Temperature Selector

Not temperature sensitive. Mounted on remote control station.

2 Air Sensor

Installed in blower discharge.

3 Amplifier

Installed in electrical control panel. Contains wiring terminals, sensitivity adjustments and one calibrating potentiometer.

4 Modulator/Regulator Val ve

Mounted in gas piping manifold. Receives electrical signal from amplifier and adjusts gas pressure to maintain desired temperature.

5 Remote Control Station

Optional

System 14 Applications

Controls discharge air temperature with instantaneous response and is ideal for industrial areas and commercial spaces such as kitc hens, hotels, restaurants and boiler rooms.

Control Operation

Desired temperature at Á is set at the remote temperature selector À. The air sensor Á senses leaving air temperature and sends an electrical signal to the amplifier Â. The amplifier then sends an electrical signal to the modulator/ regulator valve Ã, which adjusts ga s pressure to the burner, maintaining the desired temperature at Á.

Control Sequence with F an and Heat Switches

Fan and heat switches are included when a remote control station is ordered as an option.

Fan Switc h On

Optional damper opens, damper end switch closes, fan motor starter is energized, fan runs.

The freeze-stat will stop the fan if the discharge leaving air temperature is below 45 F, three minutes after the fan is turned on.

Fan Switc h Of f

Optional damper closes, damper end switch opens, fan motor starter is deenergized, fan is off.

Heat Switch On

If the fan switch is on, and the air flow switch closes, power is applied to the flame failure safeguard relay to begin predetermined ignition sequence.

Note: The f an switch must be on, or the burner will not light, ev en if the heat switch is on.

Heat Switch Of f

Heat is off.

MUA-PRC001-EN16

Controls

System 44 — Space Temper atur e Contr ol

ÀÁÂ ÃÄ

Component Description

1 Selectrastat

Mounted on remote control station in heated area where temperature is sensed. T emperature range 55 F to 90 F.

2 Air Monitor

Installed in blower discharge. Senses temperature.

3 Amplifier

Installed in electrical control panel. Contains adjustments for maximum and minimum discharge air temperature, three calibrating potentiometers and a sensitivity adjustment.

4 Modulator/Regulator V alve

Mounts in gas piping manifold. Receives electrical signal from amplifier and adjusts gas pressure to maintain desired temperature.

5 Remote Control Station

Optional

™

System 44 Applications

Provides space temperature control electronically and is ideal for commercial and industrial buildings.

T emperature Contr ol Operation

Desired temperature at Selectrastat on the remote control station. The Selectrastat controls the discharge air temperature as long as this temperature remains within preset maximum and minimum limits. If the discharge air temperature approac hes either of the set limits, the discharge air monitor which will adjust the disc harge air temperature to a higher or lower level via the modulator/regulator valve Ã. When the space temperature approaches the assigned setting, the Selectrastat resumes control.

Control Sequence with F an and Heat Switches

Fan and heat switches are included when the remote control station is ordered as an option.

will signal the amplifier Â,

is set at the

Fan Switc h On

Optional damper opens, damper end switch closes, fan motor starter is energized, fan runs.

The freeze-stat will stop the fan if the discharge leaving air temperature is below 45 F, three minutes after the fan is turned on.

Fan Switc h Of f

Optional damper closes, damper end switch opens, fan motor starter is deenergized, fan is off.

Heat Switch On

If the fan switch is on, and the air flow switch closes, power is applied to the flame failure safeguard relay to begin predetermined ignition sequence.

Note: The fan switch must be on, or the burner will not light, ev en if the heat switch is on.

Heat Switch Of f

Heat is off.

Optional

17MUA-PRC001 -EN

Electric Power

Table EP-1 — Mot or Electr ical Data — Single-Speed Mot or

HP 115 208 230 208 230 460 208 230 460 208 230 460 208 230 460 ¾ 11.0 5.4 5.5 2.5 2.6 1.3 NA NA NA 3.2 3.0 1 .5 NA NA NA 1 12.6 6.2 6.3 3.5 2.8 1.4 3.1 2.7 1 .4 3.6 2.8 1.4 3.1 2.7 1.35 1 ½ 20.0 10.5 10.0 5.0 4.2 2.1 4.5 3.9 2.0 5.0 4.2 2.1 4.5 3.9 1.95 2 21 .0 12.6 10.5 6.3 5.6 2.8 6.0 5.2 2.6 6.5 5.6 2.8 6.1 5.3 2.65 3 32.0 16.8 16.0 9.5 8.0 4.0 8.7 7.8 3.9 8.5 8.2 4.1 8.8 7.6 3.8 5 NA 25.0 23.0 15.4 13.2 6.6 13.8 12.0 6.0 15.0 13.4 6.7 14.2 12.4 6.2 7 ½ NA 33.0 31 .0 22.0 20.0 10.0 22.5 19.6 9.8 21 .5 19.2 9.6 21 .4 18.6 9.3 10 NA NA 42.0 26.4 25.2 12.6 28.0 24.4 12.2 28.0 25.2 12.6 29.0 25.0 12.5 15 NA NA NA 42.0 40.6 20.3 42.1 36.6 18.3 NA 38.8 19.4 41.2 36.6 18.3 20 NA NA NA 53.0 50.0 25.0 55.2 48.0 24.0 NA 48.0 24.0 53.8 49.0 24.5 25 NA NA NA 72.0 59.0 29.5 67 .3 57.0 28.5 NA 60.0 30.0 63.5 57.0 28.5 30 NA NA NA 78.0 71.0 35.5 81.0 69.0 34.5 NA 76.0 38.0 79.8 69.0 34.5 40 NA NA NA 108.0 95.6 47.8 NA 92.0 46.0 NA 94.0 47.0 NA 92.0 46.0 50 NA NA NA 140.0 120.0 60.0 NA 116.0 58.0 NA 120.0 60.0 NA 116.0 58.0 60 NA NA NA NA 145.0 72.5 NA 144.0 72.0 NA 140.0 70.0 NA 142.0 71.0

Notes: NA = Not Available FLA based on NEC ratings

Single Phase 3-Phase 3-Phase 3-Phase 3-Phase

ODP — 1800 RPM 1800 RPM 1800 RPM 1800 RPM

Energy-Effic. ODP TEFC Energy-Effic. TEFC

Table EP-2— Mot or Electr ical Data — Two-Speed Motor

2-Speed/1-Winding 2-Speed/2-Winding

1800/900 RPM 1800/1200 RPM

HP 208 230 460 208 230 460 ¾ NANANANANANA 1 3.5/1.5 3.4/1.6 1 .8/.75 3.2/1.8 3.4/2.2 1 .7/1.1 1 ½ 5.0/2.1 4.8/2.1 2.25/.95 5.0/2.9 4.9/2.8 2.4/1.4 2 6.2/2.6 6.4/2.7 3.0/1 .3 6.1/3.5 5.9/3.8 3.4/2.1 3 9.1/3.3 8.3/3.3 4.9/1 .9 9.0/4.8 8.4/4.8 4.6/2.6 5 14.7/5.2 13.4/5.1 7.0/2.7 16.9/9.7 15.5/10.2 7.1/4.8 7 ½ 24.0/10.0 24.5/11 .0 10.5/4.2 22.0/12.3 19.5/12.3 10.0/6.0 10 29.5/11.3 30.0/12.4 13.0/5.5 30.0/17.0 28.0/17 .5 13.5/7.5 15 43.0/15.2 40.0/14.0 19.4/7.2 47.0/22.0 54.0/21.0 19.0/1 1.0 20 56.0/20.0 54.0/21.0 26.0/10.0 56.0/29.0 51.0/27.0 24.0/12.0 25 NA NA 31.0/10.0 NA NA 30.0/17.0 30 NA NA 36.6/12.4 NA NA 38.0/18.0 40 NA NA 50.0/16.5 NA NA 48.0/24.0 50 NA NA 59.0/21.0 NA NA 59.0/30.0 60 NA NA NA NA NA NA

Notes: NA = Not Available FLA based on NEC ratings

3-Phase 3-Phase

MUA-PRC001-EN18

Dimension and Weights

Horizontal Arrang ement — Single Blo wer 109 112 115 1 18

Item Unit Components

1 Centrifugal Supply Fan 2 Fan Motor 3 Heat Source (Line Burner) 4 Control Cabinet 5 Hinged Control Cabinet Access Door 6 Motor and Drive Access Plate 7 Access Door 8 Removable Suspension Lifting Lug

9 Manifold Compartment 10 Observation Port 11 Unit Base

Inlet Hood Support (By Others)

• The purpose of hood support is to support the weight of the unit accessories which are at tac hed to the inlet of the basic unit.

• The hood support can be made from two, 2” x 2” x ¼” angle iron.

• The bottom of the angle iron support should be fitted with a base. The base can sit on the roof and does not have to be fixed to the roof. An isolation pad may be put between the base and the roof.

• One angle iron support should be located in, or close to, the outer corners of the hood. The supports can be bolted to the hood.

Table DW-1

Model A B C E F G H L M R S T

109 3' 0" 4' 4" 6' 5" 10112 3' 0" 4' 4" 6' 5" 1' 1115 3' 0" 4' 4" 6' 5" 1' 4" 1' 0118 3' 0" 4' 4" 6' 5" 1' 7" 1' 0-

Notes:

1. To permit blower shaft replacement, the side opposite the controls should have clearance equal to the unit width.

2. Minimum of 3’ for serviceability clearance.

(914) (1321) (1956) (264) (384) (367) (297) (368) (303) (533) (838) (737) (914) (1321) (1956) (344) (344) (367) (297) (321) (405) (533) (838) (737) (914) (1321) (1956) (406) (314) (505) (176) (283) (481) (533) (838) (737) (914) (1321) (1956) (483) (314) (505) (176) (200) (560) (533) (838) (737)

3/8

" 1' 3-

9/16

"1' 1-

1/8

9/16

3/8

" 1' 2-

"1' 2" 1' 7" 1' 7-

7/16

7/8

"11-

"11"6"6-

11/16

" 1' 2-½" 11-

11/16

" 1' 0-

15/16

"11-

15/16

"7-

5/8

"1' 3-

1/8

" 1' 6-

7/8

" 1' 10-

15/16

" 1' 9" 2' 9" 2' 5"

15/16

" 1' 9" 2' 9" 2' 5"

15/16

" 1' 9" 2' 9" 2' 5"

1/16

" 1' 9" 2' 9" 2' 5"

19MUA-PRC001 -EN

Dimension and Weights

Horizontal Arrang ement — Double Blow er 215 218 220 222 225 230

Item Unit Components

1 Centrifugal Supply Fan 2 Fan Motor 3 Heat Source (Line Burner) 4 Control Cabinet 5 Hinged Control Cabinet Access Door 6 Motor and Drive Access Plate 7 Access Door 8 Removable Suspension Lifting Lug

9 Manifold Compartment 10 Observation Port 11 Unit Base

Inlet Hood Support (By Others)

• The purpose of hood support is to support the weight of the unit accessories which are attached to the inlet of the basic unit.

• The hood support can be made from two, 2” x 2” x ¼” angle iron.

• One angle iron support should be located in, or close to, the outer corners of the hood. The supports can be bolted to the hood.

Table DW-2

Model A B C E F G H J L M R S T U X Y

215 3' 0" 7' 10" 6' 5" 1' 4" 1' 0-

(914) (2388) (1956) (406) (314) (505) (181) (572) (200) (481) (533) (838) (838) (533) (114) (146)

218 3' 0" 7' 10" 6' 5" 1' 7" 1' 0-

(914) (2388) (1956) (483) (314) (505) (181) (406) (200) (560) (533) (838) (838) (533) (114) (146)

220 4' 0" 10' 1 0" 8' 0" 2' 0-

(1219) (3302) (2438) (632) (335) (718) (292) (749) (314) (637) (787) (965) (991) (787) (203) (181)

222 4' 0" 10' 1 0" 8' 0" 2' 3-

(1219) (3302) (2438) (695) (335) (718) (292) (625) (314) (700) (787) (965) (991) (787) (203) (181)

225 5' 0" 12' 10" 8' 0" 2' 7-

(1524) (3912) (2438) (797) (446) (959) (368) (956) (391) (800) (654) (838) (1295) (508) (356) (159)

230 5' 0" 12' 10" 8' 0" 3' 0-

Notes:

1. To permit blower shaft replacement, the side opposite the controls should have clearance equal to the unit width.

2. Minimum of 5’ for serviceability clearance.

3. Supply duct connection (by others) to be “pants-legged” from unit discharge.

(1524) (3912) (2438) (937) (446) (959) (368) (676) (391) (940) (654) (838) (1295) (508) (356) (159)

7/8

" 1' 1-

3/8

" 1' 1-

3/8

" 1' 5-

7/8

" 1' 5-

3/8

7/8

"7-

7/8

"7-

1/8

" 1' 1 0-½" 7 -

1/8

" 1' 4" 7 -

5/8

" 1' 0-

5/8

" 1' 3-

5/8

" 1' 3-

" 1' 7 -

3/8

" 1' 7 -

3/16

" 2' 4-¼" 11 -½" 2' 5-½" 1' 0-

3/16

" 2' 4-¼" 11 -½" 2' 0-

9/16

" 3' 1-¾" 1' 2-½" 3' 1-

9/16

" 3' 1-¾" 1' 2-½" 2' 2-

7/8

3/8

15/16

" 1' 6" 1' 10-

" 2' 1" 2' 3-

" 1' 9" 2' 9" 2' 9" 1' 9" 4-½" 5-¾"

1/16

" 1' 9" 2' 9" 2' 9" 1' 9" 4-1/2" 5-¾"

1/16

" 2' 7" 3' 2" 3' 3" 2' 7" 0' 8" 7 -

9/16

” 2' 7" 3' 2" 3' 3" 2' 7" 0' 8" 7 " 2' 7-½" 2' 1-¾" 2' 9" 4' 3" 1' 8" 1' 2" 6-¼" " 3' 1" 2' 1-¾" 2' 9" 4' 3" 1' 8" 1' 2" 6-¼"

MUA-PRC001-EN20

1/8

Dimension and Weights

Horizontal Arrang ement — Single Blow er Return Air Opening Downstream of Bur ner Motorized Ret ur n Air Damper — Motori zed 75/25 D amper 109 112 115 11 8

Item Unit Components

1 Centrifugal Supply Fan 2 Fan Motor 3 Heat Source (Line Burner) 4 Control Cabinet 5 Hinged Control Cabinet Access Door 6 Motor and Drive Access Plate 7 Access Door 8 Removable Suspension Lifting Lug

9 Manifold Compartment 10 Observation Port 11 Unit Base

Inlet Hood Support (By Others)

• The purpose of hood support is to support the weight of the unit accessories which are attached to the inlet of the basic unit.

• The hood support can be made from two, 2” x 2” x ¼” angle iron.

• One angle iron support should be located in, or close to, the outer corners of the hood. The supports can be bolted to the hood.

Table DW-3

Model A B C E F G H L M R S T

109 3' 0" 4' 4" 6' 5" 10112 3' 0" 4' 4" 6' 5" 1' 1115 3' 0" 4' 4" 6' 5" 1' 4" 1' 0118 3' 0" 4' 4" 6' 5" 1' 7" 1' 0-

Notes:

1. To permit blower shaft replacement, the side opposite the controls should have clearance equal to the unit width.

2. Minimum of 3’ for serviceability clearance.

3/8

" 1' 3-

9/16

"1' 1-

1/8

9/16

3/8

" 1' 2-

"1' 2" 1' 7" 1' 7-

7/16

7/8

"11-

"11"6"6-

11/16

" 1' 2-½" 11-

11/16

" 1' 0-

15/16

"11-

15/16

"7-

5/8

"1' 3-

1/8

" 1' 6-

7/8

" 1' 10-

15/16

" 1' 9" 2' 9" 2' 5"

15/16

" 1' 9" 2' 9" 2' 5"

15/16

" 1' 9" 2' 9" 2' 5"

1/16

" 1' 9" 2' 9" 2' 5"

21MUA-PRC001 -EN

Dimension and Weights

Horizontal Arrang ement — Double Blow er Return Air Opening Downstream of Bur ner Motorized Ret ur n Air Damper — Motori zed 75/25 D amper 215 218 220 222 225 230

Item Unit Components

1 Centrifugal Supply Fan 2 Fan Motor 3 Heat Source (Line Burner) 4 Control Cabinet 5 Hinged Control Cabinet Access Door 6 Motor and Drive Access Plate 7 Access Door 8 Removable Suspension Lifting Lug

9 Manifold Compartment 10 Observation Port 11 Unit Base

Inlet Hood Support (By Others)

• The purpose of hood support is to support the weight of the unit accessories which are attached to the inlet of the basic unit.

• The hood support can be made from two, 2” x 2” x ¼” angle iron.

• One angle iron support should be located in, or close to, the outer corners of the hood. The supports can be bolted to the hood.

Table DW-4

Model A B C E F G H J L M N P R S T U W X Y

215 3' 0" 7' 10" 6' 5" 1' 4" 1' 0-

(914) (2388) (1956) (406) (314) (505) (181) (572) (200) (481) (483) (1670) (533) (838) 737) (533) (362) (114) (146)

218 3' 0" 7' 10" 6' 5" 1' 7" 1' 0-

(914) (2388) (1956) (483) (314) (505) (181) (406) (200) (560) (483) (1670) (533) (838) 737) (533) (362) (114) (146)

220 4' 0" 10' 10" 8' 0" 2' 0-

(1219) (3302) (2438) (632) (335) (718) (292) (749) (314) (637) (483) (2219) (838) (965) (991) (787) (362) (203) (181)

222 4' 0" 10' 10" 8' 0" 2' 3-

(1219) (3302) (2438) (695) (335) (718) (292) (625) (314) (700) (483) (2219) (838) (965) (991) (787) (362) (203) (181)

225 5' 0" 12' 10" 8' 0" 2' 7 -

(1524) (3912) (2438) (797) (446) (959) (368) (956) (391) (800) (300) (2829) (654) (965) (1295) (508) (514) (356) (159)

230 5' 0" 12' 10" 8' 0" 3' 0-

(1524) (3912) (2438) (937) (446) (959) (368) (676) (391) (940) (300) (2829) (654) (838) (1295) (508) (514) (356) (159)

Notes:

1. To permit blower shaft replacement, the side opposite the controls should have clearance equal to the unit width.

2. Minimum of 5’ for serviceability clearance.

3. Supply duct connection (by others) to be “pants-legged”from unit discharge.

7/8

" 1' 1-

3/8

" 1' 1-

3/8

" 1' 5-

7/8

" 1' 5-

3/8

7/8

"7-

7/8

"7-

1/8

" 1' 10-½" 7-

1/8

" 1' 4" 7-

5/8

" 1' 7-

3/8

" 1' 7-

3/16

" 2' 4-¼" 11 -½" 2' 5-½" 1' 0-

3/16

" 2' 4-¼" 11-½" 2' 0-

9/16

" 3' 1-¾" 1' 2-½" 3' 1-

9/16

" 3' 1-¾" 1' 2-½" 2' 2-

" 1' 0-

" 1' 3-

7/8

" 1’6-

7/8

" 1’10-

3/8

" 2’1-

3/8

" 2' 3-

3/8

" 2' 7 -½" 11-

3/8

" 3' 1" 11 -

15/16

" 1' 7" 5' 5-¾" 1’9” 2’9” 2’5” 1’9” 1' 2-¼" 4-½" 5-¾"

1/16

" 1' 7" 5' 5-¾" 1’9” 2’9” 2’5” 1’9” 1' 2-¼" 4-½" 5-¾"

1/16

" 1' 7" 7' 3-

9/16

" 1' 7" 7' 3-

13/16

3/8

" 2’9” 3’2” 3’3” 2’7” 1' 2-¼" 0' 8" 7-

3/8

" 2’9” 3’2” 3’3” 2’7” 1' 2-¼" 0' 8" 7-

3/8

" 9' 3-

" 2’1-¾” 3’2” 4’3” 1’8” 1' 8-¼" 1' 2" 6-¼"

3/8

" 9' 3-

" 2’1-¾” 2’9” 4’3” 1’8” 1' 8-¼" 1' 2" 6-¼"

MUA-PRC001-EN22

1/8

Dimension and Weights

Horizontal Arrang ement — Single Blow er With Mixing Box 109 112 115 11 8

Item Unit Components

1 Centrifugal Supply Fan 2 Fan Motor 3 Heat Source (Line Burner) 4 Control Cabinet 5 Hinged Control Cabinet Access Door 6 Motor and Drive Access Plate 7 Access Door 8 Removable Suspension Lifting Lug

9 Manifold Compartment 10 Observation Port 11 Unit Base

Inlet Hood Support (By Others)

• The purpose of hood support is to support the weight of the unit accessories which are at tac hed to the inlet of the basic unit.

• The hood support can be made from two, 2” x 2” x ¼” angle iron.

• One angle iron support should be located in, or close to, the outer corners of the hood. The supports can be bolted to the hood.

Table DW-5

Model A B C E F G H L M R S T

109 3' 0" 4' 4" 6' 5" 10112 3' 0" 4' 4" 6' 5" 1' 1115 3' 0" 4' 4" 6' 5" 1' 4" 1' 0118 3' 0" 4' 4" 6' 5" 1' 7" 1' 0-

Notes:

1. To permit blower shaft replacement, the side opposite the controls should have clearance equal to the unit width.

2. Minimum of 3’ for serviceability clearance.

3/8

" 1' 3-

9/16

"1' 1-

1/8

9/16

3/8

" 1' 2-

"1' 2" 1' 7" 1' 7-

7/16

7/8

"11-

"11"6"6-

11/16

" 1' 2-½" 11-

11/16

" 1' 0-

15/16

"11-

15/16

"7-

5/8

"1' 3-

1/8

" 1' 6-

7/8

" 1' 10-

15/16

" 1' 9" 2' 9" 2' 5"

15/16

" 1' 9" 2' 9" 2' 5"

15/16

" 1' 9" 2' 9" 2' 5"

1/16

" 1' 9" 2' 9" 2' 5"

23MUA-PRC001 -EN

Dimension and Weights

Horizontal Arrang ement — Double Blow er With Mixing Box 215 218 220 222 225 230

Item Unit Components

1 Centrifugal Supply Fan 2 Fan Motor 3 Heat Source (Line Burner) 4 Control Cabinet 5 Hinged Control Cabinet Access Door 6 Motor and Drive Access Plate 7 Access Door 8 Removable Suspension Lifting Lug

9 Manifold Compartment 10 Observation Port 11 Unit Base

Inlet Hood Support (By Others)

• The purpose of hood support is to support the weight of the unit accessories which are attached to the inlet of the basic unit.

• The hood support can be made from two, 2” x 2” x ¼” angle iron.

• One angle iron support should be located in, or close to, the outer corners of the hood. The supports can be bolted to the hood.

Table DW-6

Model A B C E F G H J L M R S T U X Y

215 3' 0" 7' 10" 6' 5" 1' 4" 1' 0-

(914) (2388) (1956) (406) (314) (505) (181) (572) (200) (481) (533) (838) (838) (533) (114) (146)

218 3' 0" 7' 10" 6' 5" 1' 7" 1' 0-

(914) (2388) (1956) (483) (314) (505) (181) (406) (200) (560) (533) (838) (838) (533) (114) (146)

220 4' 0" 10' 1 0" 8' 0" 2' 0-

(1219) (3302) (2438) (632) (335) (718) (292) (749) (314) (637) (787) (965) (991) (787) (203) (181)

222 4' 0" 10' 1 0" 8' 0" 2' 3-

(1219) (3302) (2438) (695) (335) (718) (292) (625) (314) (700) (787) (965) (991) (787) (203) (181)

225 5' 0" 12' 10" 8' 0" 2' 7-

(1524) (3912) (2438) (797) (446) (959) (368) (956) (391) (800) (654) (838) (1295) (508) (356) (159)

230 5' 0" 12' 10" 8' 0" 3' 0-

Notes:

1. To permit blower shaft replacement, the side opposite the controls should have clearance equal to the unit width.

2. Minimum of 5’ for serviceability clearance.

3. Supply duct connection (by others) to be “pants-legged” from unit discharge.

(1524) (3912) (2438) (937) (446) (959) (368) (676) (391) (940) (654) (838) (1295) (508) (356) (159)

7/8

" 1' 1-

3/8

" 1' 1-

3/8

" 1' 5-

7/8

" 1' 5-

3/8

7/8

"7-

7/8

"7-

1/8

" 1' 1 0-½" 7 -

1/8

" 1' 4" 7 -

5/8

" 1' 0-

5/8

" 1' 3-

5/8

" 1' 3-

" 1' 7 -

3/8

" 1' 7 -

3/16

" 2' 4-¼" 11 -½" 2' 5-½" 1' 0-

3/16

" 2' 4-¼" 11 -½" 2' 0-

9/16

" 3' 1-¾" 1' 2-½" 3' 1-

9/16

" 3' 1-¾" 1' 2-½" 2' 2-

7/8

3/8

15/16

" 1' 6" 1' 10-

" 2' 1" 2' 3-

" 1' 9" 2' 9" 2' 9" 1' 9" 4-½" 5-¾"

1/16

" 1' 9" 2' 9" 2' 9" 1' 9" 4-½" 5-¾"

1/16

" 2' 7" 3' 2" 3' 3" 2' 7" 0' 8" 7 -

9/16

” 2' 7" 3' 2" 3' 3" 2' 7" 0' 8" 7 " 2' 7-½" 2' 1-¾" 2' 9" 4' 3" 1' 8" 1' 2" 6-¼" " 3' 1" 2' 1-¾" 2' 9" 4' 3" 1' 8" 1' 2" 6-¼"

MUA-PRC001-EN24

1/8

Dimension and Weights

V er tical Arrangement — Single Blo w er 100% Outside Air—Arrangement 4

Table DW-7

Model A B C D E F G H J K L

109 10112 1' 1115 1' 4" 1' 6118 1' 7" 1' 10-

Notes:

1. Factory furnished support stand shipped separately for field mounting by others.

2. V-bank and inlet damper shown are optional components.

3. If V-bank section is ordered, it will ship mounted to the support stand.

4. If inlet damper is ordered, it will ship mounted in the support stand.

5. Refer to page 35 for unit weights.

3/8

(264) (303) (368) (384) (914) (914) (1956) (3429) (76) (559) (1321)

9/16

(344) (405) (318) (344) (914) (91 4) (1956) (3429) (76) (559) (1321) (406) (481) (283) (314) (914) (91 4) (1956) (3429) (76) (559) (1321) (483) (560) (200) (314) (914) (914) (1956) (3429) (76) (559) (1321)

15/16

"11-

15/16

" 1' 3-

15/16

1/16

" 1' 2-½" 1' 3-

" 1' ½" 1' 1-

1/8

"11-

" 1'

7/8

"7-

" 1'

1/8

" 3' 0" 3' 0" 6' 5" 11' 3" 0' 3" 1' 10" 4' 4"

9/16

" 3' 0" 3' 0" 6' 5" 11' 3" 0' 3" 1' 10" 4' 4"

3/8

" 3' 0" 3' 0" 6' 5" 11' 3" 0' 3" 1' 10" 4' 4"

3/8

" 3' 0" 3' 0" 6' 5" 11' 3" 0' 3" 1' 10" 4' 4"

25MUA-PRC001 -EN

Dimension and Weights

V ertical Arr angement —Double Blo w er 100% Outside Air—Arrangement 4

Table DW-8

Model A B C D E F G H J K L P

215 1' 4" 1' 6218 1' 7" 1' 1 0220 2' 0222 2' 3225 2' 7230 3' 0-

Notes:

1. Supply duct connection (by others) to be “pants-legged” from unit discharge

2. Factory furnished support stand shipped separately for field mounting by others.

3. V-bank and inlet damper shown are optional components.

4. If V-bank section is ordered, it will ship mounted to the support stand.

5. If inlet damper is ordered, it will ship mounted in the support stand.

6. Refer to page 35 for unit weights.

(406) (481) (200) (314) (914) (914) (1956) (3429) (76) (559) (2388) (565) (483) (560) (200) (314) (914) (914) (1956) (3429) (76) (559) (2388) (406) (632) (637) (314) (335) (1219) (1219) (2438) (4216) (102) (559) (3302) (752) (695) (700) (314) (335) (1219) (1219) (2438) (4216) (102) (559) (3302) (752) (797) (800) (391) (446) (1524) (1219) (2438) (4369) (102) (711) (3912) (956) (937) (940) (391) (446) (1524) (1219) (2438) (4369) (102) (711) (3912) (676)

15/16

1/16

7/8

1/16

" 2' 1-

3/8

9/16

" 2' 3-

3/8

" 2' 7-½" 1' 3-

7/8

" 3' 1" 1' 3-

"0' 7-

"0' 7" 1' 0" 1' 0-

7/8

3/8

" 1' 0-

" 3' 0" 3' 0" 6' 5" 11' 3" 0' 3" 1' 10" 7' 10" 1‘ 1 0-¼"

7/8

3/8

" 1' 0-

" 3' 0" 3' 0" 6' 5" 11' 3" 0' 3" 1' 10" 7' 10" 1' 4"

3/8

3/16

" 1‘ 1-

” 4’ 0" 4' 0" 8' 0" 13' 10" 0' 4" 1' 10" 10' 10" 2' 5-

3/8

3/16

" 1‘ 1-

” 4’ 0" 4' 0" 8' 0" 13' 10" 0' 4" 1' 10" 10' 10" 2' 5-

3/8

9/16

"1‘ 5-

” 5’ 0" 4' 0" 8' 0" 14' 4" 0' 4" 2' 4" 12' 10" 3' 1 -

3/8

9/16

"1‘ 5-

” 5’ 0" 4' 0" 8' 0" 14' 4" 0' 4" 2' 4" 12' 10" 2' 2-

MUA-PRC001-EN26

5/8

Dimension and Weights

V er tical Arrangement — Single Blo w er Return Air Downstream of Bur ner—Ar r angement 4

Table DW-9

Model A B C D E F G H J K L M N P

109 10112 1' 1-9/16" 1' 3-15/16" 1' ½" 1' 1115 1' 4" 1' 6118 1' 7" 1' 10-

Notes:

1. Factory furnished support stand shipped separately for field mounting by others.

2. V-bank and inlet damper shown are optional components.

3. If V-bank section is ordered, it will ship mounted to the support stand.

4. If inlet damper is ordered, it will ship mounted in the support stand.

5. Refer to page 35 for unit weights.

3/8

"11-

(264) (303) (368) (384) (914) (914) (1956) (3429) (76) (559) (1321) (362) (483) (705) (344) (405) (318) (344) (914) (914) (1956) (3429) (76) (559) (1321) (362) (483) (705) (406) (481) (283) (31 4) (914) (914) (1956) (3429) (76) (559) (1321) (362) (483) (705) (483) (560) (200) (314) (914) (914) (1956) (3429) (76) (559) (1321) (362) (483) (705)

15/16

" 1' 2-½" 1' 3-

15/16

"11-

1/16

"7-

1/8

" 1'

7/8

" 1'

1/8

" 3' 0" 3' 0" 6' 5" 11' 3" 0' 3" 1' 10" 4' 4" 1' 2-¼" 1' 7" 2' 3-¾"

9/16

" 3' 0" 3' 0" 6' 5" 11' 3" 0' 3" 1' 10" 4' 4" 1' 2-¼" 1' 7" 2' 3-¾"

3/8

" 3' 0" 3' 0" 6' 5" 11' 3" 0' 3" 1' 10" 4' 4" 1' 2-¼" 1' 7" 2' 3-¾"

3/8

" 3' 0" 3' 0" 6' 5" 11' 3" 0' 3" 1' 10" 4' 4" 1' 2-¼" 1' 7" 2' 3-¾"

27MUA-PRC001 -EN

Dimension and Weights

V ertical Arr angement — Double Blo w er Return Air Downstream of Bur ner—Ar rang ement 4

Table DW -10

Model A B C D E F G H J K L M N P R

215 1' 4" 1' 6-

(406) (481) (200) (314) (914) (914) (1956) (3429) (76) (559) (2388) (362) (483) (1670) (565)

218 1' 7" 1' 10-

(483) (560) (200) (314) (914) (914) (1956) (3429) (76) (559) (2388) (362) (483) (1670) (406)

220 2' 0222 2' 3225 2' 7230 3' 0-

Notes:

1. Supply duct connection (by others) to be “pants-legged” from unit discharge.

2. Factory furnished support stand shipped separately for field mounting by others.

3. V-bank and inlet damper shown are optional components.

4. If V-bank section is ordered, it will ship mounted to the support stand.

5. If inlet damper is ordered, it will ship mounted in the support stand.

6. Refer to page 35 for unit weights.

7/8

(632) (637) (314) (335) (1219) (1219) (2438) (4216) (102) (559) (3302) (362) (483) (2219) (752)

3/8

(695) (700) (314) (335) (1219) (1219) (2438) (4216) (102) (559) (3302) (362) (483) (2219) (752)

3/8

(797) (800) (391) (446) (1524) (1219) (2438) (4369) (102) (711) (3912) (514) (313) (2829) (956)

7/8

(937) (940) (391) (446) (1524) (1219) (2438) (4369) (102) (711) (3912) (514) (313) (2829) (676)

15/16

"7-

1/16

"7-

1/16

" 2' 1" 2' 3-

" 1' 0-

9/16

" 1' 0" 2' 7-½" 1' 3" 3' 1" 1' 3-

7/8

" 1' 0-

7/8

" 1'

3/8

" 1' 1-

3/8

" 1' 1-

3/8

" 1' 5-

3/8

" 1' 5-

3/8

" 3' 0" 3' 0" 6' 5" 1 1' 3" 0' 3" 1' 10" 7' 10" 1' 2-¼" 1' 7" 5' 5-¾" 1' 10-¼"

3/8

" 3' 0" 3' 0" 6' 5" 11' 3" 0' 3" 1' 10" 7' 10" 1' 2-¼" 1' 7" 5' 5-¾" 1' 4"

3/16

" 4' 0" 4' 0" 8' 0" 13' 1 0" 0' 4" 1' 10" 10' 10" 1' 2-¼" 1' 7" 7' 3-

3/16

" 4' 0" 4' 0" 8' 0" 13' 1 0" 0' 4" 1' 10" 10' 10" 1' 2-¼" 1' 7" 7' 3-

9/16

" 5' 0" 4' 0" 8' 0" 14' 4" 0' 4" 2' 4" 12' 10" 1' 8-¼" 1' 0-

9/16

" 5' 0" 4' 0" 8' 0" 14' 4" 0' 4" 2' 4" 12' 10" 1' 8-¼" 1' 0-

5/16

" 9' 3" 9' 3-

3/8

" 2' 5-

3/8

" 2' 5-

3/8

" 3' 1-

3/8

" 2' 2-

5/8

MUA-PRC001-EN28

Dimension and Weights

V ertical Arrang ement Single Blower with Mixing Box—Arrangement 4

Table DW -11

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

109 10112 1' 1115 1' 4" 1' 6118 1' 7" 1' 1 0-

Notes:

1. Factory furnished support stand shipped separately for field mounting by others.

2. V-bank and inlet damper shown are optional components.

3. If V-bank section is ordered, it will ship mounted to the support stand.

4. If inlet damper is ordered, it will ship mounted in the support stand.

5. Refer to page 35 for unit weights.

3/8

"11-

(264) (303) (368) (384) (914) (914) (1956) (4242) (76) (1372) (1321) (514) (1 067)

9/16

(344) (405) (318) (344) (914) (914) (1956) (4242) (76) (1372) (1321) (514) (1 067) (406) (481) (283) (314) (914) (914) (1956) (4242) (76) (1372) (1321) (514) (1 067) (483) (560) (200) (314) (914) (914) (1956) (4242) (76) (1372) (1321) (514) (1067)

" 1' 3-

15/16

" 1' 2-½" 1' 3-

15/16

" 1' ½" 1' 1-

15/16

"11-

1/16

"7-

1/8

" 1'

7/8

" 1'

1/8

" 3' 0" 3' 0" 6' 5" 13' 11" 0' 3" 4' 6" 4' 4" 1' 8-¼" 3' 6"

9/16

" 3' 0" 3' 0" 6' 5" 13' 1 1" 0' 3" 4' 6" 4' 4" 1' 8-¼" 3' 6"

3/8

" 3' 0" 3' 0" 6' 5" 13' 11" 0' 3" 4' 6" 4' 4" 1' 8-¼" 3' 6"

3/8

" 3' 0" 3' 0" 6' 5" 13' 11" 0' 3" 4' 6" 4' 4" 1' 8-¼" 3' 6"

29MUA-PRC001 -EN

Dimension and Weights

V ertical Arrang ement Double Blower With Mixing Box—Ar r angement 4

Table DW -12

Model A B C D E F G H J K L M N P

215 1' 4" 1' 6218 1' 7" 1' 10220 2' 0222 2' 3225 2' 7230 3' 0-

Notes:

1. Supply duct connection (by others) to be “pants-legged” from unit discharge

2. Factory furnished support stand shipped separately for field mounting by others.

3. V-bank and inlet damper shown are optional components.

4. If V-bank section is ordered, it will ship mounted to the support stand.

5. If inlet damper is ordered, it will ship mounted in the support stand.

6. Refer to page 35 for unit weights.

(406) (481) (200) (314) (914) (914) (1956) (4242) (76) (1372) (2388) (514) (2134) (565) (483) (560) (200) (314) (914) (914) (1956) (4242) (76) (1372) (2388) (514) (2134) (406)

7/8

" 2' 1-

(632) (637) (314) (335) (1219) (1219) (2438) (5182) (102) (1524) (3302) (514) (3048) (749)

3/8

" 2' 3-

(695) (700) (314) (335) (1219) (1219) (2438) (5182) (102) (1524) (3302) (514) (3048) (625)

3/8

" 2' 7 -½" 1' 3-

(797) (800) (391) (446) (1524) (1219) (2438) (5309) (102) (1651) (3912) (667) (3658) (957)

7/8

" 3' 1" 1' 3-

(937) (940) (391) (446) (1524) (1219) (2438) (5309) (102) (1651) (3912) (667) (3658) (676)

15/16

"7-

1/16

"7-

1/16

" 1' 0-

9/16

" 1' 0-

7/8

" 1'

7/8

" 1'

3/8

" 1' 1-

3/8

" 1' 1-

3/8

" 1' 5-

3/8

" 1' 5-

3/8

" 3' 0" 3' 0" 6' 5" 13' 11" 0' 3" 4' 6" 7' 10" 1' 8-¼" 7' 0" 1' 10-¼"

3/8

" 3' 0" 3' 0" 6' 5" 13' 11" 0' 3" 4' 6" 7' 10" 1' 8-¼" 7' 0" 1' 4"

3/16

" 4' 0" 4' 0" 8' 0" 17' 0" 0' 4" 5' 0" 10' 1 0" 1' 8-¼" 1 0' 0" 2' 5-½"

3/16

" 4' 0" 4' 0" 8' 0" 17' 0" 0' 4" 5' 0" 10' 1 0" 1' 8-¼" 10' 0" 2' 0-

9/16

" 5' 0" 4' 0" 8' 0" 17' 5" 0' 4" 5' 5" 12' 1 0" 2' 2-¼" 12' 0" 3' 1 -

9/16

" 5' 0" 4' 0" 8' 0" 17' 5" 0' 4" 5' 5" 12' 1 0" 2' 2-¼" 12' 0" 2' 2-

5/8

MUA-PRC001-EN30

Dimension and Weights

Accessories

Table DW -13

Model R/A/I.D.

109-118 3' 6" x 1' 8-¼" 215-218 7' x 1' 8-¼" 220-222 10' x 1' 8-¼" 225-230 12' x 2' 2-½"

(1067 x 514) (2134 x 514) (3048 x 514) (3658 x 673)

NOTE: ALL DIMENSIONS IN INCHES SUBJECT TO MANUFACTURING TOLERANCES.

Table DW -14

Model A B C D E F G H J K L M Filters [Qty] Size

109-112 3' 0" 3' 1 1-¼" 1' 5115-118 3' 0" 3' 11-¼" 1' 10215-218 3' 0" 7' 7-½" 1' 10220-222 4' 0" 8' 5225-230 5' 0" 10' 1-

Note: *Permanent filters are constructed of aluminum mesh.

(914) (1200) (443) (529) (559) (1568) (819) (1095) (533) (584) (1321) (1372) ([9] 381x508x51) (914) (1200) (581) (684) (559) (1568) (819) (1095) (610) (660) (1321) (1372) ([9] 381x508x51)

(914) (2324) (581) (1648) (559) (1568) (819) (2219) (610) (660) (2388) (1372)([18] 381x508x51) (1219) (2581) (794) (2146) (559) (1670) (1124) (2477) (1 1 43) (787) (3302) (1524)([25] 508x508x51) (1524) (3083) (1035) (2677) (711) (2188) (1429) (2978) (1143) (1035) (3912) (1651)([36] 508x635x51)

5/8

" 2' 7-¼" 7' 0-½" 1' 10" 5' 5-¾" 3' 8-¼" 8' 1-½" 3' 9" 2' 7" 10' 1 0" 5' 0" [25] 20x20x2"

3/8

" 3' 4-¾" 8' 9-

7/16

" 1' 8-

7/8

" 2' 2-

7/8

" 5' 4-

13/16

" 1' 10" 5' 1-¾" 2' 8-¼" 3' 7-

15/16

" 1' 10" 5' 1-¾" 2' 8-¼" 3' 7-

7/8

" 1' 10" 5' 1-¾" 2' 8-¼" 7' 3-

3/8

" 2' 4" 7' 2-

1/8

" 4' 8-¼" 9' 9-¼" 3' 9" 3' 4-¾" 12' 10" 5' 5" [36] 20x25x2"

1/8

" 1' 9" 1' 11" 4' 4" 4' 6" [9] 15x20x2"

1/8

" 2' 0" 2' 2" 4' 4" 4' 6" [9] 15x20x2"

3/8

" 2' 0" 2' 2" 7' 10" 4' 6" [18] 15x20x2"

31MUA-PRC001 -EN

Dimension and Weights

Roof Curbs

Table DW -15

Model A B C D E

109 10112 1' 1115 1' 4" 9118 1' 7" 9-

3/8

" 1' 0-

(264) (314) (303) (298) (579)

9/16

"10-

(344) (275) (405) (251) (530) (406) (244) (481) (213) (492) (483) (244) (560) (130) (492)

3/8

"11-

13/16

" 1' 3-

5/8

" 1' 6-

5/8

" 1' 10-

15/16

" 1 1 -¾" 1' 10-

"9"8-

1/16

"5-

7/8

" 1' 8-

3/8

" 1' 7-

1/8

" 1' 7-

13/16

7/8

3/8

" " " "

Table DW -16

Model A B C D E F G H J K

215 1' 4" 9-

(406) (244) (481) (130) (572) (594) (1905) (1816) (2337) (2248)

218 1' 7" 9-

(483) (244) (560) (130) (406) (594) (1905) (1816) (2337) (2248)

220 2' 0-

(632) (265) (637) (244) (749) (902) (2388) (2299) (3251) (3162)

222 2' 3-

(695) (265) (700) (244) (625) (902) (2388) (2299) (3251) (3162)

225 2' 7-

(797) (376) (800) (321) (956) (902) (2388) (2299) (3861) (3772)

230 3' 0-

(937) (376) (940) (321) (676) (902) (2388) (2299) (3861) (3772)

Notes:

1. Curb to be shipped loose and assembled in the field.

2. Curb must be square and level.

3. Curb requires intermediate structural support and is not to be corner post mounted.

4. Gaskets to be shipped with unit.

5. Bolting accessories shipped with curb.

6. Curb drawings shown are for units which have controls on the “standard” side.

7. Available on horizontal units only.

7/8

"10-

3/8

"10-

3/8

" 1' 2-

7/8

" 1' 2-

5/8

7/16

13/16

15/16

" 1' 6-

" 2' 1" 2' 3-

1/16

9/16

" 1' 10-

" 2' 7 -½" 1' 0" 3' 1" 1' 0-

1/8

"5-

" 1' 10-½" 1' 11 -

1/8

"5-

" 1' 4" 1' 11-

5/8

"9-

" 2' 5-½" 2' 1 1-½" 7' 1 0" 7' 6-½" 10' 8" 10' 4-½"

5/8

"9-

" 2' 0-

5/8

" 3' 1" 2' 2-

5/8

" 2' 11-½" 7' 10" 7' 6-½" 10' 8" 10' 4-½"

5/8

" 2' 11-½" 7' 10" 7' 6-½" 12' 8" 12' 4-½"

5/8

" 2' 11-½" 7' 10" 7' 6-½" 12' 8" 12' 4-½"

3/8

" 6' 3" 5' 11 -½" 7' 8" 7' 4-½"

3/8

" 6' 3" 5' 11 -½" 7' 8" 7' 4-½"

MUA-PRC001-EN32

Dimension and Weights

Roof Curbs for Units with Return Air Opening Downstream of Bur ner

Table DW -1 7

Model A B C D E

109 10112 1' 1115 1' 4" 9118 1' 7" 9-

3/8

" 1' 0-

(264) (314) (303) (298) (579)

9/16

"10-

(344) (275) (405) (251) (530) (406) (244) (481) (213) (492) (483) (244) (560) (130) (492)

3/8

"11-

13/16

" 1' 3-

5/8

" 1' 6-

5/8

" 1' 10-

15/16

" 1 1 -¾" 1' 10-

"9"8-

1/16

"5-

7/8

" 1' 8-

3/8

" 1' 7-

1/8

" 1' 7-

13/16

7/8

3/8

" " " "

Table DW -1 8

Model A B C D E F G H J K L M W

215 1' 4" 9218 1' 7" 9220 2' 0222 2' 3225 2' 7230 3' 0-

Notes:

1. Curb to be shipped loose and assembled in the field.

2. Curb must be square and level.

3. Curb requires intermediate structural support and is not to be corner post mounted.

4. Gaskets to be shipped with unit.

5. Bolting accessories shipped with curb.

6. Curb drawings shown are for units which have controls on the “standard” side.

7. Available on horizontal units only.

(406) (244) (481) (130) (572) (594) (1905) (1816) (2337) (2248) (1670) (413) (362) (483) (244) (560) (130) (406) (594) (1905) (1816) (2337) (2248) (1670) (413) (362)

7/8

"10-

(632) (265) (637) (244) (749) (902) (2388) (2299) (3251) (3162) (2219) (413) (362)

3/8

"10-

(695) (265) (700) (244) (625) (902) (2388) (2299) (3251) (3162) (2219) (413) (362)

3/8

" 1' 2-

(797) (376) (800) (321) (956) (902) (2388) (2299) (3861) (3772) (2829) (230) (514)

7/8

" 1' 2-

(937) (376) (940) (321) (676) (902) (2388) (2299) (3861) (3772) (2829) (230) (514)

5/8

" 1' 6-

5/8

" 1' 10-

7/16

" 2' 1-

7/16

" 2' 3-

13/16

" 2' 7-½" 1' 0-

13/16

" 3' 1" 1' 0-

15/16

1/16

9/16

1/8

"5-

" 1' 10-½" 1' 11-

1/8

"5-

" 1' 4" 1' 1 1 -

5/8

"9-

" 2' 5-½" 2' 11-½" 7' 10" 7' 6-½" 10' 8" 10' 4-½" 7' 3-

5/8

"9-

" 2' 0-5/8" 2' 11-½" 7' 10" 7' 6-½" 10' 8" 10' 4-½" 7' 3-

5/8

" 3' 1" 2' 2-

5/8

3/8

" 6' 3" 5' 11 -½" 7' 8" 7' 4-½" 5' 5-¾" 1' 4-¼" 1' 2-¼"

3/8

" 6' 3" 5' 11 -½" 7' 8" 7' 4-½" 5' 5-¾" 1' 4-¼" 1' 2-¼"

" 2' 11 -½" 7' 10" 7' 6-½" 12' 8" 12' 4-½" 9' 3" 2' 11 -½" 7' 10" 7' 6-½" 12' 8" 12' 4-½" 9' 3-

3/8

" 1' 4-¼" 1' 2-¼"

3/8

" 1' 4-¼" 1' 2-¼"

3/8

1/16

"9"9-

" 1' 8-¼"

1/16

" 1' 8-¼"

33MUA-PRC001 -EN

Dimension and Weights

Roof Curbs for Units with Mixing Box

Table DW -1 9

Model A B C D E

109 10112 1' 1115 1' 4" 9118 1' 7" 9-

3/8

" 1' 0-

(264) (314) (303) (298) (579)

9/16

"10-

(344) (275) (405) (251) (530) (406) (244) (481) (213) (492) (483) (244) (560) (130) (492)

3/8

"11-

13/16

" 1' 3-

5/8

" 1' 6-

5/8

" 1' 10-

15/16

" 1 1 -¾" 1' 10-

"9"8-

1/16

"5-

7/8

" 1' 8-

3/8

" 1' 7-

1/8

" 1' 7-

13/16

7/8

3/8

" " " "

Table DW -20

Model A B C D E F G H J K L M

215 1' 4" 9218 1' 7" 9220 2' 0222 2' 3225 2' 7230 3' 0-

Notes:

1. Curb to be shipped loose and assembled in the field.

2. Curb must be square and level.

3. Curb requires intermediate structural support and is not to be corner post mounted.

4. Gaskets to be shipped with unit.

5. Bolting accessories shipped with curb.

6. Curb drawings shown are for units which have controls on the “standard” side.

7. Available on horizontal units only.

(406) (244) (481) (130) (572) (594) (3277) (3188) (2337) (2248) (514) (2134) (483) (244) (560) (130) (406) (594) (3277) (3188) (2337) (2248) (514) (2134) (632) (265) (637) (244) (749) (902) (3912) (3823) (3251) (3162) (514) (3048) (695) (265) (700) (244) (625) (902) (3912) (3823) (3251) (3162) (514) (3048) (797) (376) (800) (321) (956) (902) (4064) (3950) (3861) (3772) (673) (3658) (937) (376) (940) (321) (676) (902) (4064) (3950) (3861) (3772) (673) (3658)

7/8

3/8

7/8

"1' 2-

"10"10-

"1' 2-

5/8

" 1' 6-

5/8

" 1' 10-

7/16

" 2' 1-

7/16

" 2' 3-

13/16

"2' 7-½" 1' 0-

13/16

" 3' 1" 1' 0-

15/16

1/8

"5-

" 1' 10-½"1' 11 -

1/16

1/8

"5-

" 1' 4" 1' 1 1 -

1/16

5/8

"9-

" 2' 5-½" 2' 11-½" 12' 10"12' 6-½" 10' 8" 1 0' 4-½"1' 8-¼" 10' 0"

9/16

5/8

"9-

" 2' 0-

5/8

" 3' 1-

5/8

" 2' 2-

3/8

" 10' 9" 10' 5-½" 7' 8" 7' 4-½" 1' 8-¼" 7' 0"

3/8

" 10' 9" 10' 5-½" 7' 8" 7' 4-½" 1' 8-¼" 7' 0"

5/8

" 2' 1 1-½" 12' 10" 12' 6-½" 10' 8" 10' 4-½"1' 8-¼" 10' 0"

5/8

" 2' 1 1-½" 13' 4" 13'-½" 12' 8" 12' 4-½"2' 2-½" 12' 0"

5/8

" 2' 1 1-½" 13' 4" 13'-½" 12' 8" 12' 4-½"2' 2-½" 12' 0"

MUA-PRC001-EN34

Dimension and Weights

Approximat e Weights

Table W-1 — Outdoor Unit Weights in Pounds (Approximat e)*

Unit Horizontal Vertical Inlet Inlet V-Bank Mixing Discharge Discharge Size Unit Unit Hood Damper Filter Box Damper Louver A B C D

109 760 1010 140 60 125 320 45 70 215 215 185 145 112 760 1010 140 60 125 320 45 70 215 215 185 145 115 760 1010 140 60 125 320 45 70 215 215 185 145 118 820 1060 140 60 125 320 45 70 225 225 200 160 215 1180 1650 210 160 200 586 80 150 342 342 274 222 218 1300 1770 210 160 200 586 80 150 378 378 31 1 233 220 2280 3270 275 210 250 730 145 215 625 625 555 475 222 2370 3360 275 210 250 730 145 215 675 675 545 475 225 2990 4250 365 320 330 1006 190 230 824 824 732 610 230 3130 4390 365 320 330 1006 190 230 863 863 731 673

Note: *Contact factory for shipping weight on models exceeding 50,000 CFM.

Basic Basic

Table W-2 — Roof Curb Weights in Pounds

Description 109 1 12 115 1 1 8 215 218 220 222 225 230 Roof Curb for Basic Frame—No Return Air 150 150 150 150 200 200 270 270 300 300 Roof Curb for Basic Frame—With Return Air Downstream of Burner 150 150 150 150 200 200 270 270 300 300 Roof Curb for Basic Frame—With Mixing Box Option 215 215 215 215 270 270 340 340 375 375

Unit Size

35MUA-PRC001 -EN

Mec hanical Specifications

General

The BASIC unit is factory-assembled, wired and test-fired. DEPENDING ON

THE OPTIONS, UNIT MAY SHIP IN SECTIONS DUE TO PHYSICAL SIZE OF EQUIPMENT. Although designed

primarily for outdoor mounting, it can be mounted indoors. Units are mounted on steel rails with lifting lugs, whic h make them suitable for curb or slab mounting. Units are available for operation on either natural or LP (propane) gas.

Casing

Basic unit casings are fabricated of die-formed galvanized steel. Unit sizes 109-220 shall be 18-g auge. Unit sizes 225-230 shall be 18-gauge, except exterior walls which are 16-gauge.

Access doors are hinge-mounted with industrial-type hardware for easy access to service compartments.

All casings shall be airtight and weatherproof. Complete access shall be provided to all components through gasketed access doors or panels. This includes the motor, blower , burner, electrical components, and manifold sections.

Fans

Supply fans shall be double width, double inlet centrifugal type with FC fan wheels. Fans are tested in accordance with AMCA 21 0. The fan or fans shall be mounted on a heavy-duty polished steel shaft designed for a maximum operating speed not to exceed 75 percent of its first critical speed. Bearings are to be heavyduty, industrial prelubricated type. Bearing life is 100,000 hours.

Blowers are driven by a V-belt package sized with a capacity of 25 percent greater than the motor horsepower. Multiple belt applications will be matched sets. Drives are adjustable pitched diameter type up through 7½ hp, fixed on motors over 7½ hp.

Burner Section

The burner section shall contain a Maxon NP burner constructed of rustresistant cast iron bodies (which serve as the gas manifold) drilled to discharge the fuel between diverging #321 stainless steel mixing plates. The entire burner assembly is mounted directly in the air stream being heated. The fresh air stream passes through the mixing plates and mixes with the fuel as combustion air; thus, all available heat from the gaseous fuel is released directly into the air stream. Air velocities across the burner assemblies are established by the use of profile plates.

The manifold is located outside of the airstream and shielded from atmospheric conditions by means of a protective compartment with hinged access. An observation por t shall be located to provide view of the pilot and main flame.

Units shall be supplied with a widerange burner with a modulating turndown ratio of 25 to 1 . Adjustable profile plates shall be provided and sized to maintain the required velocity across the line burner. The operation of the burner shall be programmed through the flame safeguard with timed prepurge and flame sensing.

Control Enclosure

Units shall be provided with a control compartment. All controls mounted within this compartment are to be wired to a numbered terminal strip. All wiring is to be color coded and in accordance with NEC. A circuit diagram of the approved electrical drawing shall be provided with the unit. All electrical components shall bear the UL label.

Controls

Unit controls shall consist of a spark ignition system with a flame rod sensing the flame, a high temperature limit switch set at 185 F, a flame safeguard with alarm contacts, ignition transformer, air proving dif ferential switch, timed freeze protection, and a series 14 or 44 modulating control system.

The unit shall also contain a main fan starter and overloads, control circuit fuses, and vents for outdoor units.

Gas T rain Approvals

The standard gas train consists of a main manual gas shutoff valve, a motorized electric main gas valve, the Maxitrol modulating gas valve, a manual pilot gas shutoff valve, a manual pilot gas pressure regulator, a pilot gas valve, an orificed needle valve, and an auxiliary gas valve.

The Factory Mutual (FM) gas train consists of a manual main gas shutoff valve, a motorized electric main gas valve, the Maxitrol modulating gas valve, a manual pilot gas shutoff valve, a manual pilot gas pressure regulator, a pilot gas valve, an orificed needle valve, a high/low gas pressure switch, a manual auxiliary gas shutoff valve, and an auxiliary gas valve. (Optional)

The Industrial Risk Insurers (IRI) gas train consists of a manual main gas shutoff valve, a motorized electric main gas valve, the Maxitrol modulating gas valve, a manual pilot gas shutoff valve, a manual pilot gas pressure regulator, a pilot gas valve, an orificed needle valve, a high/low gas pressure switch, a manual auxiliary gas shutoff valve, a normally open vent valve, and an auxiliary gas valve. (Optional)

MUA-PRC001-EN36

Motoriz ed Retur n Air D amper

Purpose

T o pro vide a w ay for recirculating return air.

Operation

A two position switch controls the return air damper.

When the two position switch is in the “RA” position, the RA damper opens. Fifty percent of supply air is RA, 50 percent of supply air is OA.

RA damper can be set to allow from 0 percent to 50 percent return air by field adjustment of the linkage rods. The gas valve opening is restricted when the RA damper is open.

Code requires that outside ventilation air be provided to the space in the amount of 4 cfm per 1 MBh of burner rated input.

All units are provided with a means that will allow the customer to interlock O A fans when the amount of OA provided by the unit is not sufficient to meet the 4 cfm per 1 MBh requirement.

Options

When the two position switch is in the “OA” position, the RA damper is closed, and 100 percent of supply air is OA.

Note: This option cannot be used with a two speed fan mot or.

Note: This option can be used with either the Motoriz ed Inlet Damper option or the Motori zed Outlet D amper option.

Option Includes:

• Return air damper

• Two position damper motor

• Damper switch

Motoriz ed 75/25 Damper

Purpose

To provide a way for recirculating return air and letting building pressure control the amount of air which is recirculated.

Operation

If building pressure is less than desired, the RA damper modulates to a more closed position and the interlocked burner profile damper modulates to a more open position. More OA is brought into building.

If building pressure is greater than desired, the RA damper modulates to a more open position and the interlocked burner profile damper modulates to a more closed position. Less OA is brought into building.

At no time will the unit provide less than 25 percent OA to the building. In general terms, the minimum OA is 25 percent; however, there are cases where it can be as high as 40-50 percent, depending upon unit size, burner size, gas train type and gas pressure.

Code requires that outside ventilation air be provided to the space in the amount of 4 cfm per 1 MBh of burner rated input.

All units are provided with a means that will allow the customer to interlock O A fans when the amount of OA provided by the unit is not sufficient to meet the 4 cfm per 1 MBh requirement.

Note: This option cannot be used with a two speed fan mot or.

Note: This option can be used with either the Motoriz ed Inlet Damper option or the Motori zed Outlet D amper option.

Option Includes:

• Return air damper

• Burner profile damper

• Linkage

• Modulating damper motor(s)

• Photohelic differential pressure gauge

37MUA-PRC001 -EN

Mixing Box — Temperature Contr ol

Purpose

To provide a way for recirculating return air and letting mixed air temperature determine the amount of OA/RA.

Operation

A temperature sensor located after the V bank filter modulates the OA and RA dampers to maintain a set temperature. If temperature at sensor is cooler than setting, OA damper modulates to a more closed position, and RA damper modulates to a more open position. If temperature at sensor is warmer than setting, OA damper modulates to a more open position, and RA damper modulates to a more closed position.

Options

The minimum OA damper position is factory set with a potentiometer. The minimum OA damper position is set at 4 cfm per 1 MBh of burner rated input, or 25% supply air, whic hever is larger.

The desired temperature at the temperature sensor is set at the control cabinet at the unit.

Option Includes:

• Mixing box with V-bank filter and permanent filters

• Dampers

• Modulating damper motor(s)

• Temperature sensor

Mixing Box — Manual Control

Purpose

To provide a way for recirculating return air and using manual control to determine the amount of OA/RA.

Operation

A manual potentiometer located at the remote control station determines the OA/RA setting. The minimum OA damper position is factory set with a potentiometer. The minimum OA damper opening is set at 4 cfm per 1 MBh of burner rated input, or 25% supply air, whic hever is larger .

Option Includes:

• Mixing box with V-bank filter and permanent filters

• Dampers

• Modulating damper motor(s)

• Manual potentiometer

Note: Remote contr ol station not included.

MUA-PRC001-EN38

Mixing Box — Building Pressure Contr ol

Purpose

To provide a way for recirculating return air and letting building pressure control the amount of air which is recirculated.

Operation

If building pressure is less than desired, the RA damper modulates to a more closed position and the OA damper modulates to a more open position. More OA is brought into building.

If building pressure is greater than desired, the RA damper modulates to a more open position and the OA damper modulates to a more closed position. Less OA is brought into building.

The minimum OA damper position is factory set with a potentiometer. The minimum OA damper position is set at 4 cfm per 1 MBh of burner rated input, or 25% supply air, whic hever is larger.

The desired pressure differential is set at the photohelic.

Options

Option Includes:

• Mixing box with V-bank filter and permanent filters

• Dampers

• Modulating damper motor(s)

• Photohelic differential pressure gauge

Motoriz ed Inlet Damper

Purpose

To provide a shut-off damper .

Operation:

When the fan switch is on, the inlet damper begins to open. As the inlet damper approaches the full open position, a built-in end switch located inside the damper motor closes. The closed end switch starts the fan motor. When the fan switch is turned to the “off” position, or if there is a power failure, the inlet damper closes.

Option Includes:

• Damper

• Two position damper motors with builtin end switch and spring return

• Linkage

39MUA-PRC001 -EN

Options

Motoriz ed Outlet Damper

Purpose

To provide a shut-off damper .

Operation

When the fan switch is on, the outlet damper begins to open. As the outlet damper approaches the full open position, a built-in end switch located inside the damper motor closes. The closed end switch starts the fan motor. When the fan switch is turned to the “off” position, or if there is a power failure, the outlet damper closes.

CGA Approv al Requirements

A DFOA unit with no mixing box, motorized RA damper , or motorized 75/ 25 damper can bear the CGA label if:

The unit SCFM is less than the Maximum SCFM given below.

The unit input is less than the Maximum Input BTUH given below.

The static pressure is in the range given below.

Unit discharge temperature is 75 F maximum.

The ambient temperature is minus 40 F or greater.

The unit has a maximum temperature rise of 90 F for single blower units and 100 F for double blower units.

The unit minimum input rating is 1/25 of the Max. Input BTUH given below.

The fuel is natural gas.

The motor is a single speed motor.

Unit components are standard (there are exceptions to this).

Model Static Max. Max. Input. No. (in W.C.) SCFM (BTUH) DFOA 109 0-4.0 3,000 325,500 DFOA 112 0-4.0 4,250 461,125 DFOA 115 0-4.0 6,000 851,000 DFOA 118 0-4.0 8,500 922,250 DFOA 215 0-4.0 12,000 1,302,000 DFOA 218 0-4.0 17,000 1,844,500 DFOA 220 0-4.0 26,000 2,821,000 DFOA 222 0-4.0 31,000 3,363,500 DFOA 225 0-4.0 46,000 4,991,000 DFOA 230 0-3.5 64,000 6,944,000

Option Includes:

• Damper

• Two position damper motor with builtin end switch and spring return

• Linkage

ETL Labeling Requirements

A DFOA unit with a mixing box, motorized RA damper , or motorized 75/25 damper can bear the ETL label if:

The unit SCFM is less than the Maximum SCFM given below.

The unit input is less than the Maximum BTUH rating given below.

The unit temperature rise is less than the Maximum Temperature Rise given below.

The fuel is natural gas.

The motor is a single speed motor.

Unit components are standard (there are exceptions to this).

Model Max. Max. Max. T emp. No. SCFM BTUH Rise DFOA 1 09 3,000 291,262 100 F DFOA 112 4,250 412,621 1 00 F DFOA 115 6,000 582,524 100 F DFOA 118 8,500 680,000 100 F DFOA 215 12,000 1,349,831 100 F DFOA 218 18,000 1,800,000 100 F DFOA 220 26,000 2,924,634 100 F DFOA 222 31,000 3,100,000 1 00 F DFOA 225 46,000 5,174,353 100 F DFOA 230 64,000 6,400,000 100 F

ETL Labeling Requirements

A DFOA unit with no mixing bo x, motorized RA damper , or motorized 75/25 damper can bear the ETL label if:

The unit SCFM is less than the Maximum SCFM given below.

The unit input is less than the Maximum BTUH rating given below.

The unit temperature rise is less than the Maximum Temperature Rise given below.

The fuel is natural gas.

The motor is a single speed motor.

Unit components are standard (there are exceptions to this).

Model Max. Max. Max. T emp. No. SCFM BTUH Rise DFOA 1 09 3,000 424,565 120 F DFOA 112 4,250 601,290 120 F DFOA 115 6,000 848,880 120 F DFOA 118 8,500 1,202,580 120 F DFOA 215 12,000 1,697,760 120 F DFOA 218 18,000 2,546,640 120 F DFOA 220 26,000 3,678,480 120 F DFOA 222 31,000 4,385,880 120 F DFOA 225 46,000 6,508,080 120 F DFOA 230 64,000 9,054,720 120 F

These requirements were current when this catalog was printed. Please contact Technical Support for the most current data available.

MUA-PRC001-EN40

Options

Exhaust Interloc k

The exhaust interlock is a pair of contacts on the unit that will close when the unit is “on.” The customer can wire the exhaust fan to the contacts so that when the heating unit is “on,” the exhaust fan will also be “on.” Note the heating unit turns on the exhaust fan.

The auxiliary contacts on the fan motor starter are the contacts whic h are used as the exhaust interlock. The auxiliary contacts are wired to the numbered terminal strip. The customer can wire the indicated terminals into the control circuit of the exhaust fan.

Note: If the cust omer wants the exhaust fan to t ur n the heating unit “on,” he/she has to provide a pair of contacts that will close when the exhaust fan is “on.”

Interloc king Relay

The interlocking relay is two pair of contacts, one normally open and the other normally closed. The contacts switch positions when the unit is “on.” The contacts are wired to the numbered terminal strip. The customer can wire a wide range of devices to the interlocking relay by wiring to the indicated terminals.

Seven Day Timeclock/ Night Setback Thermostat

The seven day timeclock is used primarily for either one of the following:

Start and stop the unit at preset times Example: A building is occupied at

8:00 AM. At 4:30 PM, people leave the building. The timeclock could be set to turn the unit on at 7:30 AM and of f at 5:00 PM.

The timeclock can be used with an on-of f night setback thermostat (NSB thermostat). The timeclock and NSB thermostat would be wired so that during the night, the NSB thermostat would turn the unit on and off.

Example: Same as example above, only at 5:00 PM the NSB thermostat would turn the unit on and off. If the temperature in the space fell below the setting of the NSB thermostat, the unit would come “on.” If the temperature rose above the setting, the unit would go “off.”

Inlet On-Off Duct Stat

Automatically turns burner off when inlet air temperature equals setting of control. Works as a loc kout for the burner.

Example: If we want the burner to be “off” if the entering air temperature is 65 degrees, the inlet on-off duct stat would be set at 65 degrees.

Without the inlet on-off duct stat, if the fan switch and heat switc h are both “on,” no matter how warm the incoming air , the burner will go as low as low fire, but will not go “off.”

UV Flame Sensor (UV Mini-Peeper)

Flame sensor checks to make sure the pilot flame has ignited before gas is sent to the main burner. Operates by sensing the light of the pilot flame.

If the flame sensor does not sense the pilot flame, the unit shuts down (fan and burner go off) and the flame failure light on the optional remote panel goes on.

The unit has to be reset by pushing the reset button on the burner relay .

Differences between UV Flame Sensor and Flame Rod:

Both are used for the same purpose — to chec k if the pilot flame is on. The flame rod is “standard.” The UV sensor needs to be ordered as an option.

If condensation forms on the flame rod while the unit is off, it may give a false signal and prevent the unit from coming on. The wet flame rod does not sense the pilot flame and shuts the unit down. This nuisance tripping can be avoided with the UV flame sensor.

Optional Gas Controls

Series 14 — Constant Dischar ge Temperature

The constant discharge temperature, ga s modulating control system consists of the Maxitrol electronic gas modulating system (55 to 90 F range), which includes a discharge air sensor located in the blower discharge, a modulator/regulator valve mounted in the gas piping manifold, an amplifier installed in the electrical control panel, a 115 to 24 volt transformer, and a remote temperature selector.

Series 44 — Space Temperature Contr ol

The space temperature control, gas modulating control system consists of the Maxitrol electronic gas modulating system, which includes a S eries 44 discharge air sensor (55 to 90 F range) mounted in the blower discharge, a modulator regulator valve mounted in the gas piping manifold, an amplifier installed in the electric control panel, a 115 to 24 volt transformer , and a Selectrastat mounted in the area where the temperature is to be sensed.

41MUA-PRC001 -EN

Options

Fact ory Installed Options

Motors — General

All motors are provided as standard, with a starter for external overload protection, a control transformer, and a fusible disconnect switch.

Open Drip-Proof Mot or 60 Hz/1800 Rpm

Single Phase

Optional 115V motors are available in ¾ to 3 hp models. Optional 208V motors are available in ¾ to 7½ hp models. Optional 230V motors are available in ¾ to 10 hp models. All motors have rigid base construction and ball bearings. Class A insulation is on all motors up to and including 3 hp models. Class B insulation is on 5 hp and above models.

Three-Phase

Optional 208, 230, 460V available in 1 to 60 hp models. All models have rigid base construction and ball bearings. Class B insulation is on all three-phase motors.

Energy Ef ficient ODP 60 Hz/1800 Rpm

Three-Phase Only

Optional 208V motors are available in 1 to 30 hp models. 230 and 460V motors are available in 1 to 60 hp models. All motors have rigid base construction and ball bearings. Class B insulation is on all motors.

Totally Enclosed Motor 60 Hz/1800 Rpm

Three-Phase Only

Optional 208V motors are available in ¾ to 20 hp models. Optional 230 and 460V motors are available in ¾ to 60 hp models. All motors have rigid base construction and ball bearings.

Energy Ef ficient TEFC 60 Hz/1800 Rpm

Three-Phase Only

T wo-Speed/One Winding Motors 60 Hz/1800/900 Rpm

Three-Phase Only

Optional 208 and 230V motors available on 1 to 20 hp models. Optional 460V motors are available on 1 to 50 hp models. All motors have rigid base construction and ball bearings. Class B insulation is on all motors.

T wo-Speed/T wo Winding Motors 60 Hz/1800/1200 Rpm

Three-Phase Only

Additional Options*

Inlet Hood and Birdscreen

Hood constructed of 18-gauge galvanized steel. Birdscreen is 18-g auge galvanized steel with one-inc h square openings.

V -Bank Filt er Section

Not required when a mixing box is specified. Constructed of 18-gauge galvanized steel.

Dampers and Mixing Box Motoriz ed Retur n Air Damper

This option provides a way to recirculate air, with the return air opening downstream of the burner. This option includes return air damper, a twoposition damper motor, linkage and damper switch. It is not available with two-speed motors.

Motoriz ed 75/25 Damper

This option provides a way for recirculating return air and allows building pressure to control the amount of air that is recirculated. This option includes a return air damper, burner profile plate damper, damper linkage, and modulating pressure controller. It is not available with two-speed motors.

Mixing Box — T emper atur e Contr ol

This option provides a way for recirculating return air and allows mixed air temperature to determine the amount of OA/RA. This option includes mixing box with filter section, dampers, damper actuator(s), and damper controls.

Mixing Box — Building Pressure Contr ol

This option provides a way for recirculating return air and allows building pressure to control the amount of air which is recirculated. This option includes a mixing box with filter section, dampers, damper actuator(s), and damper controls (including a photohelic differential pressure gauge).

Mixing Box — Manual Control

This option provides a way for recirculating return air and using manual control to determine the amount of OA/ RA. This option includes a mixing box with filter section, dampers, damper actuator(s), and a manual potentiometer.

Inlet/Outlet Dampers Motoriz ed Inlet Damper

This option provides a shutoff damper . This option includes an outside air damper, damper motor with built-in end switch, and linkage. It is not available with a mixing box.

Motoriz ed Outlet Damper

This option provides a shutoff damper . This option includes a discharge damper , two-position damper motor with a builtin end switch, and linkage.

*Based on unit design, some options can ship factory installed or field installed. Contact the factory f or verification.

MUA-PRC001-EN42

Accessories

Additional F actory Installed Options

High Gas Pressure Regulator 1-5 Psig

Units 825 MBh and less require an additional gas pressure regulator if inlet pressure exceeds 1 psig. Inlet pressure at the job must be specified.

5-10 Psig

An additional regulator is furnished. Inlet pressure at the job must be specified.

Insulation

One-inch, 1½ lb. fiberglass insulation pin spotted to casing.

Insulation on Basic Frame Insulation on Filter Section Internal Blo wer/Mot or Isolation

This option includes a steel frame for blower(s) and a fan motor with spring type vibration isolators. It is not available on vertical units.

Extended Grease Lines

This option allows lubrication of fan bearings from the control side of the unit.

Controls Opposite fr om Standard Inlet On-Off Duct Stat

This automatically turns the burner off when inlet air temperature equals desired discharge air temperature. It works as a lockout for the burner . Temperature range of 25 to 225 SPDT.

1 15V Duplex Receptacle

This option includes a transformer and disconnect switch for the receptacle. Components are mounted in the gas piping manifold.

Circuit Analyzer

Provides indicator lights for maintenance troubleshooting. If the unit is not functioning properly, the service person will want to know which circuits are open and which are closed. The circuit analyzer will tell the service person, at a glance, the status (open or closed) of the different circuits. If an indicating light is lit, the circuit is in its correct operating mode. It mounts on the control panel of the unit. The number of lights and functions depends on the control options of the unit.

UV Flame Sensor

The flame sensor chec ks to make sure the pilot flame has ignited before gas is sent to the main burner. It operates by sensing the light of the pilot flame.

Clogged Filter Switc h

This option includes a pressure sensing switch whic h senses the pressure drop across the filters. When the pressure drop reaches the setpoint, the switc h trips and lights the clogged filter light. It is not required when City of Chicago controls are ordered.

Exhaust Fan Inter loc k

This option includes a pilot duty rated normally open contact on the main supply fan motor starter that will close simultaneously with the starter (1 0 amp contacts).

Interloc king Rela y

This option is energized by an auxiliary contact on the supply fan motor starter that can be used for additional equipment that may need to run when the supply fan is running (12 amp contacts).

City of Chicago Controls

This option includes an access door interlock switc h, an alarm horn with silence switch, low temperature limit, and a clogged filter switch.

Field Installed A ccessor ies

Vibration F eet

Rubber-in-shear vibration isolators cannot be ordered with a roof curb — they ship unmounted.

Vibration Feet — Basic Fr ame Vibration F eet — Filter Section Vibration F eet — Mixing Box Seven-Day Time Clock

This option includes a Paragon sevenday general purpose time control with a four -pole switch.

100 DBL Alarm Hor n and Silencing Switch

The alarm horn and silencing switch are field-wired so that if the pilot flame does not ignite, the alarm sounds. To silence the alarm, the push button silencing switch is pushed.

Remote Control Station

Option includes fan and heat switches, burner on light, alarm light, and Maxitrol Selector or Selectrastat.

On-Off Night Setback Thermostat

This option will shut unit off when space temperature is above setpoint. This is a 115V thermostat with a temperature range of 50 to 80 F. Option is normally used together with the seven-day timeclock option.

High Gas Pressure Regulator — Over 1 0 Psig

Specify inlet pressure at the jobsite. This is required for selection of the regulator.

Roof Curbs

Roof curbs are fabricated of 12-gauge galvanized steel. Curb g asket is provided. The 12-inch high roof curbs ship disassembled.

Roof Curb For Basic Frame —

No return air

Roof Curb For Basic Frame —

With return air downstream of the burner

Roof Curb For Basic Frame —

With mixing box option

43MUA-PRC001 -EN

The T rane Company An American Standard Company www.trane.com

For more information contact your local district office, or e-mail us at comfort@trane.com

Literature Order Number File Number Supersedes Stocking Location

MUA-PRC001-EN PL-UN-MUA-DFOA-PRC001-9-00 MUA-D-2 12/97 Inland - LaCrosse

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

Trane DFOA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

Features and Benefits

Unit Configurations

Application Considerations

Model Number Description

P erformance Data

Gas Piping

Controls

Electric Power

Accessories

Roof Curbs

Roof Curbs for Units with Return Air Opening Downstream of Bur ner

Roof Curbs for Units with Mixing Box

Approximat e Weights

Mec hanical Specifications

Motoriz ed Retur n Air D amper

Options

Motoriz ed 75/25 Damper

Mixing Box — Temperature Contr ol

Mixing Box — Manual Control

Mixing Box — Building Pressure Contr ol

Motoriz ed Inlet Damper

Motoriz ed Outlet Damper

Accessories