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PACKAGED ROOFTOP ARRANGEMENTS

1. NATURAL VENT RA POWER VENT AIR HANDLERS RA l CERE gt S gt q m B zm EE N 1 1 t lt lt n n A BIFID SP OC sp gt gt t 4 t L t EV B F D r EV B F D gt e se gt 6 R 1 1 t wb B F D SP E Ev BFD o o sp PN ro aro S t 4 1 V t I I I I I I 2 FD B d d e FD B N 9 9 T t t t 4 I I I I L T 22 Fron E SP Poh s 9 se EN aA J P gp FD U t 4 1 4 1 S EN n n Qo Fp cc B K a cc of o t ec s 1 1 1 1 F T L T m a FID cc B SP gt FD cc B d cl sp L J t 4 t i Notes 1 Arrangements are shown with the maximum number of furnaces available 2 Optional air inlet hood shown in dotted lines Legend B F D Standard Blower Filter Damper SP Supply Plenum EV Evaporative Cooler F D Filter Damper B High CFM Blower CC Cooling Coil Capacity CA 10 40 1 furnace CA 50 80 2 furnaces CA 12 3 furnaces 34 XIV GAS EQUIPMENT START UP Customer Job Name amp Number PRE INSPECTION INFORMATION With power and gas off Type of Equip Unit Heater Duct Furnace Indoor Rooftop Serial Number Model Number Name Plate Voltage Name Plate Amperage Type of Gas Natural LP Tank Capacity Ibs Rating
2. HIGH CFM BLOWER A BEYOND THE HUB END A KEY B PROJECTS TO PROVIDE A GRIP FOR REMOVING DO NOT OPERATE SHEAVE WITH FLANGE PROJECTING D3881 20 TROUBLESHOOTING For troubleshooting of the duct furnace refer to Outdoor Rooftop Gas Fired Duct Furnace Installation and Service Manual For Evaporative Cooler Cooling Coil equipped units refer to these specific manuals for additional troubleshooting guides For additional troubleshooting see following Troubleshooting Guide TROUBLESHOOTING GUIDE AIR BLOWER PROBLEM PROBABLE CAUSE SOLUTION 1 Noise Blower Wheel Hitting Scroll Side a Blower Wheel not centered in blower housing b Damaged blower housing c Damaged blower wheel d Shaft loose in blower bearing e Blower Wheel loose on shaft f Blower bearing loose in bearing support Blower Wheel Hitting Cutoff a Cutoff not secure in blower housing b Cutoff damaged c Cutoff improperly positioned Drive a Pulley not tight on shaft motor and or blower wheel b Belts too loose Adjust for belt stretching after 48 hours of operation c Belts too tight d Belts wrong cross section e Belts not matched in length on multi belt drive f Variable pitch pulleys not adjusted so each pulley has same pitch diameter multi belt drives g Misaligned pulleys h Belts worn i Motor or
3. 17 Primary Air Shutter 17 enn cg 17 V START UP 17 18 VI MAINTENANCE 18 20 VII TROUBLESHOOTING 21 26 Vill REPLACEMENT PARTS 26 SERVICE NOTE one nee 26 X WARRANTY emere 26 XI UNIT SHIP WEIGHTS 27 29 CENTER OF GRAVITY 30 32 XIII UNIT NUMBER DESCRIPTION 33 XIV START UP SHEET 35 Unless otherwise specified the following conversions may be used for calculating SI unit measurements 1 foot 2 0 305 m 1 inch water column 20 249 kPa 1inch 25 4 1000 Btu per hour 0 293 kW 1 psig 6 894 kPa 1000 Btu Cu Ft 37 5 MJ m 1 pound 0 435 kg liter second CFM x 0 472 1 gallon 3 785 L meter second FPM 196 8 1 cubic foot 0 028 m The following terms are used throughout this manual to bring attention to the presence of potential hazards or to important information concerning the product 4 DANGER Indicates an imminently hazardous situation which if not avoided will result in death serious injury or substantial property damage A WARNING Indicates an imminently hazard ous situation which if not avoided coul
4. curb Kit Suffix Legend 10 15 26 7 16 30 3 16 35 7 16 Capacity Suffix 671 767 900 10 15 _ 37 7 16 41 3 16 46 7 16 Ra 2 20 25 50 1048 1179 20 25 50 2 48 7 16 52 3 16 57 7 16 x 3 30 38 60 70 48 716 52 546 57 771 30 35 60 70 3 53 15 16 57 11 16 62 15 16 4 40 80 12 REA 7 466 0 40 80 12 4 7 Figure 6 SECTION BOTH SIDES RETURN DAMPER SECTION X X 21 2 DAMPER EXTENSION SEE DETAIL B SEE DETAIL C 64 15 16 DUCT MOUNTING UNIT BASE RAIL WITH CURB CAP 24 FLANGE SEE DETAIL E 16 CURB FLASHING 406 BY OTHERS ROOFZ 2224 1 0 DAMPER O S OR DAMPER 0 5 PLENUM 1 5 PLENUM 1 5 5 1 16 REF 20 7 8 A 20 7 8 4 11 16 REF 4 11 16 REF 129 530 530 119 ROOF OPENING 119 ROOF OPENING ROOF OPENING MODEL D E 24 26 CURB CAP END ADAPTOR 10 15 610 660 SUPPLIED WITH UNIT 37 INVERT IN PLACE AS SHOWN 20 25 50 889 940 SEAL ALL JOINTS 8 SEAMS Refer Figure 40 for A dimension 46 48 4 30 35 60 70 4 168 1 219 135 REF BOTH ENDS 51 1 2 53 1 2 DETAIL 40 80 12 1 1 359 SUPPLY PLENUM SKID RAIL DUCTWORK FLAN
5. Adjust belt tension to give 1 2 inch to 3 4 inch belt play when depressed CAUTION Blower motor full load amps should never be exceeded Improper unit operation or motor failure could result After changing blower RPM confirm blower motor full load amps have not been exceeded See motor data plate for maximum full load amps LIGHTING Refer to Outdoor Duct Furnace Manual for all heating functions general comments are as follows Purge the gas line to the unit of air before attempting to light the pilot Check for gas leaks A WARNING Never use an open flame to detect gas leaks Explosive conditions may exist which could result in personal injury or death This unit is equipped with an intermittent ignition system A lighting instruction is attached to the unit To set the intermittent ignition system into operation proceed as follows 1 Turn on the gas valve s main manual valve 2 Turn on electrical power The unit is now under thermostat control 3 Set thermostat to highest level This will initiate the sequence of operation detailed in the Gas Control System section Check main burners for operation 4 Setthermostat to lowest level This will interrupt power to the ignition control and shut off gas Confirm pilot and main burners have been extinguished 5 Set the thermostat to the desired setting For complete unit shutdown proceed as follows 1 Turn off the gas valve s main manu
6. RCOO3 B amp D 50 80 752 34 1 8 97 1 8 93 3 8 95 102 3 8 RCO04 C amp 10 40 867 2 467 2 371 2 413 2 600 50 37 1 8 55 1 4 133 1 4 129 1 2 131 1 8 138 1 2 005 z 10720 943 1 403 3 385 3 289 3 331 3 518 1 1 2 1 172 38 38 37 3 16 29 3 16 107 5 16 103 9 16 105 3 16 112 9 16 RCOD6 20 40 aan eu 2226 e 7 30 1 8 59 127 119 1 4 120 7 8 128 1 4 RCOOB GE 50 80 1 499 3 124 515 2822 G 12 37 5 16 80 15 16 159 5 16 155 9 16 157 1 4 164 1 2 RCO09 J amp K 50 40 40 B 51 ine L 10 40 7 J 12 36 15 16 107 11 16 185 5 16 181 9 16 183 1 4 190 1 2 RCO10 L 50 80 938 2 735 4 707 4 612 4 655 4 839 CAPACITY CURB NO appaNGEMENT R F G H J Q R K M 11 45 1 4 41 1 2 43 1 8 50 172 RCO12 M amp P N A N A TERT N A N A RCOO1 29 5 8 8 1 8 71 1 8 67 3 8 69 76 3 8 1 172 1 172 RCOO2 x NER Us 1 806 0 1 753 5 940 38 1 8 81 7 16 77 11 16 79 5 16 86 11 16 1 1 2 20 OR 40 RCO1S 5 ood N A 2 069 6 Gee uA G4 N A 37 3 16 29 3 16 107 5 16 103 9 16 105 3 16 112 9 16 RCO06 G eu 12 726 2 630 Geo 12290 a a 37 1 8 55 1 4 133 174 129 172 131 1 8 138 172 38 38 RCOOS w Hel 8 06 22210 556 CURB NO CAPACITY W B
7. with Chilled Water Coil ARRANGEMENT L with Chilled Water Coil Unit Without Outside Air Hood With Outside Air Hood Type Center of Gravity Corner Weights Ibs Center of Gravity Corner Weights Ibs Capacity Width Length X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 RT10 32 75 160 74 6 15 8 314 274 257 294 71 3 15 9 337 272 255 317 10 32 75 160 74 5 15 8 314 273 256 294 71 3 15 9 337 271 255 317 RT15 32 75 160 77 8 15 9 307 291 276 291 74 6 15 9 331 289 274 314 PV15 32 75 160 77 7 15 9 307 289 274 291 74 4 15 9 331 287 273 314 RT20 43 75 160 78 6 21 1 348 337 315 326 75 2 21 2 377 334 313 353 PV20 43 75 160 78 2 21 1 347 332 310 324 74 8 21 2 375 329 309 352 RT25 43 75 160 79 2 21 2 359 351 330 337 758 212 387 348 328 364 25 43 75 160 78 8 21 2 357 346 325 335 75 4 21 2 385 344 323 362 RT30 54 75 160 80 4 26 2 408 412 379 375 77 0 26 3 440 408 377 406 PV30 54 75 160 79 8 26 2 405 403 371 372 76 4 263 438 400 369 403 RT35 54 75 160 80 2 26 1 422 424 385 384 76 8 26 1 455 421 383 415 PV35 54 75 160 79 6 26 0 420 416 377 381 76 2 26 1 453 412 375 412 RT40 60 25 160 80 5 28 8 441 446 409 404 77 1 28 9 476 443 407 438 40 60 25 160 800 288 438 438 401 402 76 5 28 9 474 434 399 435 RT50 43 75 186 93 8 21 2 450 458 428 421 90 7 21 2 478 455 427 448 PV50 43 75 186 93 2 21 1 447 448 419 418 90 1 21 2 475 446 418 445 RT60 54 75 186 94 9 26 1 512 533 486 467 91 8 26 2 544 530 485 498
8. No 54 National Fuel Gas Code All of the ANSI and NFPA Standards referred to in these installation instructions are those that were applicable at the time the design was certified The ANSI Standards are available from the American National Standards Institute Inc 11 West 42nd Street New York NY 10036 or www ansi org The NFPA Standards are available from the National Fire Protection Association Batterymarch Park Quincy MA 02269 If installed in Canada the installation must conform with local building codes or in the absence of local building codes with CSA B149 1 Installation Codes for Natural Gas Burning Appliances and Equipment or CSA B149 2 Installation Codes for Propane Gas Burning Appliances and Equipment These outdoor duct furnaces have been designed for and certified to comply with CSA 2 8 These units have been designed certified for outdoor use only and may be located on the roof of the building or at any convenient location external to the building to be heated Make certain that the power sources conform to the requirements of the heater Follow installation instructions CAREFULLY to avoid creating unsafe conditions All wiring should be done and checked by a qualified electrician using copper wire only All gas connections should be made and leak tested by a suitably qualified individual per instructions in this manual Use only the fuel for which the heater is designed see nameplate Using LP gas in
9. PV60 54 75 186 94 1 26 1 506 518 471 460 90 9 26 1 538 514 469 491 RT70 54 75 186 949 25 9 532 555 499 479 91 9 26 0 565 552 498 510 70 54 75 186 94 1 25 9 527 539 484 473 910 25 9 559 536 483 504 RT80 60 25 186 955 28 9 554 585 539 510 92 4 28 9 588 581 537 543 PV80 60 25 186 948 28 9 548 569 523 504 91 66 289 583 566 522 537 ARRANGEMENTS 1 with DX Cooling Coil ARRANGEMENT L with DX Cooling Coil Unit Without Outside Air Hood With Outside Air Hood Type Center of Gravity Corner Weights Ibs Center of Gravity Corner Weights Ibs Capacity Width Length X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 RT10 32 75 160 77 7 15 8 273 258 240 254 74 0 15 8 297 256 239 277 10 32 75 160 77 7 15 8 273 257 240 254 74 0 15 8 297 255 238 277 15 32 75 160 81 3 15 9 267 276 260 251 77 5 15 9 291 273 258 274 15 32 75 160 81 1 15 9 266 274 258 251 77 3 15 9 290 271 256 274 RT20 43 75 160 81 7 21 1 308 321 298 286 77 8 21 1 336 318 297 313 PV20 43 75 160 81 3 21 1 306 316 294 284 77 4 21 1 335 313 292 312 RT25 43 75 160 82 2 21 1 318 335 313 297 78 4 21 2 346 333 311 324 PV25 43 75 160 81 8 21 1 316 331 308 295 78 0 21 1 345 328 307 322 RT30 54 75 160 83 1 26 1 367 396 362 335 79 3 26 2 400 393 360 366 PV30 54 75 160 82 5 2641 364 388 354 332 78 7 26 2 397 384 352 364 RT35 54 75 160 828 26 0 381 409 368 344 79 1 26 0 414 405 367 375 PV35 54 75 160 822 25 9 379 400 360 341 785 26 0 4
10. These units are certified for operation on either natural or propane gases If a unit is to be installed at an altitude exceeding 2000 feet 610 m above sea level derate the unit input of each duct furnace by 4 for each 1000 feet 305 m above sea level Special main burner gas orifices are required for installations above 2000 feet 610 m In Canada if unit is to be installed at altitudes of 2000 feet 610 m to 4500 feet 1372 m each duct furnace must have the main burners re orificed to give 90 of the normal altitude input rating If the unit was ordered from the factory for high altitude operation confirm input rating See Gas Input Adjustment RIGGING Rig unit using either belt or cable slings Use spreader bars to protect the top of the unit when it is lifted See Figure 1 On units with a total length of less than 104 inch 2642 mm excluding evaporative cooler two holes are provided in the base rail on each side of the unit Slide pipes beneath the unit through these holes and attach rigging to pipes for lifting the unit On units with a total length of a 104 inch 2642 mm or greater excluding evaporative cooler lifting lugs attached to the base rail are provided Attach rigging to lugs for lifting the unit For distance between lifting lugs and total unit lengths refer to original Submittal Sheets supplied specified for the unit Also see Center of Gravity and Weights Sections in this manual Figure 1
11. areas of the unit primarily the main electrical cabinet with the unit disconnect switch closed Failure to exercise caution when working in the presence of energized electrical components may result in injury or death from electrical shock 2 Set the thermostat switching subbase as indicated below a position the cooling system switch at either COOL or AUTO b set the fan switch to AUTO 3 Place the system switch in the ON position With the thermostat calling for cooling unit operation is automatic Final Checkout Run the unit sequentially through its stages of heating and cooling Once proper unit operation is verified perform these final steps 1 Inspect unit for debris and or misplaced tools and hardware 2 Besure all gas valves and controls are in the operating position if the unit will be operating immediately 3 Cycle unit on all safety controls to verify proper unit operation 4 Confirm proper operating control thermostat or ductstat operation by cycling unit 5 Secure all exterior panels in place VI MAINTENANCE A WARNING Open all disconnect switches and secure in that position before servicing unit Failure to do so may result in personal injury or death from electrical shock A WARNING Gas tightness of the safety shut off valves must be checked on at least an annual basis To check gas tightness of the safety shut off valves turn off the manual valve upstream of the
12. oO O S o 9 Sudden expansion in duct work f Sudden contraction in duct work Turning vanes Pulsation or Surge Blower too large for application Ducts vibrate at same frequency as blower pulsations Rattles and or Rumbles Vibrating duct work Vibrating cabinet parts Vibrating parts not isolated from building 2 CFM Low Blower Insufficient Air Flow Forward curved blower wheel installed backwards Blower operating backwards Cutoff missing or improperly installed Blower wheel RPM too low Duct System Actual system is more restrictive than expected Dampers closed oO o O O Registers closed d Leaks in supply duct 22 PROBLEM PROBABLE CAUSE SOLUTION 2 CFM Low Filters Dirty or clogged Insufficient Air Flow Coil DX or Chilled Water Dirty or clogged Obstructions in High Velocity Air Stream Obstruction near unit outlet b Sharp elbows near unit outlet c Improperly designed turning vanes d Projections dampers or other obstructions in part of duct system where air velocity is high 3 CFM High System a Oversized duct work Too Much Air Flow b Access door open c Registers or grilles not installed d Filters not in place e System resistance lower than anticipated Blower Blower RPM is too great 4 Blower Does Not Operate Installation a Incorrect electrical connection b Wrong v
13. section of the Rooftop unit must be supported which includes supports located at both ends If the unit consists of a High CFM Blower section a DX Coil a Duct Furnace and a Supply Plenum five supports are required See Figure 4 Figure 4 Support must clear return air opening and fit inside base rail flange See Figures 4 amp 13 for this dimension Support must fit inside base rail flanges MOUNTING ON ROOF CURB Assemble and install roof curb per Roof Curb Installation Instructions See Figures 5 6 7 amp 8 for roof opening sizes distance between openings and unit relationship to roof curb Figure 5 Roof Curb Kits Dimensional Data 1 7 8 Typ Flange Q J OVERALL INSIDE INSIDE INSIDE M 1 I w I INSIDE VIEW B D3859FR OUTSIDE I i 1 I m H B OUTSIDE OUTSIDE R OUTSIDE SIDE VIEW INSIDE END VIEW 771 1 7 8 Flange SE CURB NO ARRANGEMENT RA CAPACITY CA F G H J Q R K M RCOO1 8 1 8 71 1 8 67 3 8 69 76 3 8 RCOO2 B amp D 10 40 29 5 8 ag into 1 753 1 946
14. 000 BTU HR C 1 HP w Contactor P 3 HP w Mag Starter 3 2HP VFD 15 150 000 BTU HR 60 600 000 BTU HR D 1 1 2 HP w Contactor 5 HP w Mag Starter 4 3HP VFD 20 200 000 BTU HR 70 700 000 BTU HR E 2 HP w Contactor S 7 1 2 HP w Mag Starter 5 5 HP VFD 25 250 000 BTU HR 80 800 000 BTU HR G 3 HP w Contactor 10 HP w Mag Starter 6 7 1 2 30 300 000 BTU HR 5 w Contactor U 15 HP w Mag Starter 7 10HP VFD 35 350 000 BTU HR Triple Furnace J 1 2 HP w Mag Starter 0 None 8 15 HP VFD 40 400 000 BTU HR 12 1 200 000 BTU HR K 3 4 HP w Mag Starter Z Other 5 Furnace Access Type FT Starter Standard Temperature Rise 20 60 Deg F Right Side Access 14 Air Inlet Configuration Al B Standard Temperature Rise 20 60 Deg F Left Side Access 1 Outside Air OA 4 Outside Air and Return Air OA RA C High Temperature Rise 60 90 Deg F Right Side Access 2 Outside Air w Air Hood 5 Outside and Return Air w Air Hood D High Temperature Rise 60 90 Deg F Left Side Access 3 Return Air RA 0 None 0 None Z Other Z Other Note Unit Type PV not available in Capacity 30 15 Control M varangement AC 6 Furnace Construction Material FM B Return Air 2 Pos Motor Spring Return 1 Aluminized Steel C OA RA 2 Pos Spring Return 2 409 Stainless Steel First Furnace Only D OA RA Mod Mtr w Mixed Air Control Min Pot 3 4
15. 1 Discharge air temp high fire F or C Check rotation of main blower External static pressure in W C or kPa C Check motor amps L1 12 13 Cycle by thermostat or operating control 1 Blower RPM Check air filters Record quantity amp size 35 MESTEK SA INC A 260 NORTH ELM ST WESTFIELD MA 01085 TEL 413 568 9571 FAX 413 562 8437 www mestek com
16. 389 350 404 54 8 28 6 485 384 347 438 PV80 60 25 124 568 28 5 442 373 335 397 540 286 478 369 333 431 RT12 60 25 150 70 8 28 8 559 500 456 510 68 2 28 8 594 469 454 544 12 60 25 150 703 287 545 481 438 496 67 7 28 8 580 477 436 530 30 ARRANGEMENTS G ARRANGEMENT Unit Without Outside Air Hood With Outside Air Hood Type Center of Gravity Corner Weights lbs Center of Gravity Corner Weights lbs Capacity Width Length X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 RT20 43 75 108 60 0 20 7 223 279 252 201 56 3 20 8 253 275 249 229 PV20 43 75 108 59 6 20 7 223 274 246 200 55 8 20 8 252 269 244 228 RT25 43 75 108 61 0 20 8 230 298 270 208 573 20 8 259 293 267 236 25 43 75 108 605 208 229 292 264 207 56 9 208 259 288 262 235 RT30 54 75 108 62 1 25 4 267 361 313 232 58 4 25 5 302 355 310 264 PV30 54 75 108 615 254 266 351 304 230 57 7 255 301 346 301 262 RT35 54 75 108 615 25 1 284 375 318 240 580 252 319 369 315 272 PV35 54 75 108 60 9 2541 283 365 308 239 573 252 318 359 306 271 RT40 60 25 108 61 7 27 9 297 395 341 256 58 1 28 0 334 389 338 290 40 60 25 108 6141 27 9 295 385 332 255 575 28 0 333 379 329 289 RT50 43 75 134 75 6 20 9 303 392 360 278 723 21 0 332 389 358 305 PV50 43 75 134 75 0 20 9 301 382 350 275 71 6 _ 209 330 378 348 303 RT60 54 75
17. Length X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 X Coor Y Coor Corner 1 Corner 2 Corner Corner 4 RT10 32 75 98 43 3 15 5 210 166 150 190 40 1 15 6 236 163 148 214 10 32 75 98 43 3 15 5 210 166 150 190 40 0 15 6 235 162 147 214 15 32 75 98 43 9 15 6 216 175 158 196 40 7 15 6 241 171 156 220 15 32 75 98 43 8 15 6 215 173 157 195 40 6 15 6 240 169 154 219 RT20 43 75 98 43 5 20 8 257 205 185 233 40 3 20 8 287 200 182 261 PV20 43 75 98 43 2 20 8 255 201 181 230 40 0 20 8 285 196 178 259 RT25 43 75 98 43 8 20 8 263 212 192 238 40 7 20 9 293 208 189 267 25 43 75 98 43 6 208 260 208 189 236 40 5 20 9 290 204 186 264 0 54 75 98 44 1 25 5 308 251 220 269 41 0 25 6 343 246 217 302 PV30 54 75 98 438 25 5 304 245 213 265 40 6 25 6 339 239 210 297 RT35 54 75 98 43 8 25 4 324 261 226 281 40 8 25 5 359 256 223 313 PV35 54 75 98 43 5 25 4 320 255 220 276 40 4 25 5 355 249 217 309 RT40 60 25 98 44 0 28 2 340 277 244 299 41 0 28 3 378 271 240 334 PV40 60 25 98 43 7 28 2 336 271 237 295 40 7 28 3 374 265 234 330 RT50 43 75 124 57 3 20 9 346 296 272 317 54 4 21 0 375 293 270 345 PV50 43 75 124 570 209 340 289 265 312 54 1 21 0 369 285 263 340 RT60 54 75 124 57 4 25 9 402 346 310 360 545 25 9 436 342 307 392 PV60 54 75 124 570 258 393 334 298 350 540 259 427 329 295 382 RT70 54 75 124 57 3 25 8 428 368 327 381 54 6 25 9 462 363 325 413 PV70 54 75 124 56 8 25 7 420 355 315 372 54 1 25 8 454 350 312 404 RT80 60 25 124 57 6 28 6 449
18. a heater that requires natural gas or vice versa will create the risk of gas leaks carbon monoxide poisoning and explosion A WARNING Do not attempt to convert the heater for use with a fuel other than the one intended Such conversion is dangerous as it could create unsafe conditions that result in death serious injury or substantial property damage Make certain that power source conforms to electrical requirements of heater Disconnect power before installing or servicing heater If power disconnect is out of sight lock it in open position and tag it to prevent unexpected application of power Failure to do so could result in fatal electric shock A WARNING Do not depend upon a thermostat or other switch as the sole means of dis connecting power when installing or servicing heater Always disconnect power at main circuit breaker as described above Failure to do so could result in fatal electric shock Special attention must be given to any grounding information pertaining to this heater To prevent the risk of electrocution the heater must be securely and adequately grounded This should be accomplished by connecting a grounded conductor from the service panel to the conduit box of the heater To ensure proper ground the grounding means must be tested by qualified field technician Do not insert fingers or foreign objects into the heater or its air moving device Do not block or tamper with the he
19. electrical location Clogged Filter Switch Optional The clogged filter switch monitors the pressure differential across the air filters If this pressure differential becomes too great the switch will alert of this condition At this point the air filters must either be cleaned or replaced The switch will reset itself Firestat Optional Located in either the return airstream the supply airstream or both this control monitors temperatures with setpoints which are field adjustable If the temperature exceeds the setpoint the control will cease unit operation To resume unit operation a manual reset of this control is required Freezestat Optional Located in either the return airstream the supply airstream or both this control monitors temperatures with setpoints which are field adjustable If the temperature does not exceed the setpoint the control will cease unit operation V START UP Before starting the unit use the Installation Check Sheet located at the end of this manual and read the Outdoor Duct Furnace Manual entirely in conjunction with the procedures outlined below to ensure that the unit is completely and properly installed and ready for start up AWARNING Installer s responsibility All safety controls must be checked Check and test the operational functions of all safety devices supplied with this unit Failure to do so could result in unsafe conditions and may result in death seriou
20. p W ASHRAE Cycle II OA RA Mod Mtr w Warm up Stat Mixed Air Min Pot SR E Blower Standard Plenum S Air Handler High CFM X ASHRAE Cycle OA RA Mod Mtr w Warm up Stat Mixed Air SR G Blower High CFM Air Handler High CFM Plenum J Blower High CFM Plenum U Air Handler High CFM Cooling Y Manual Dampers K Blower High CFM Cooling W Air Handler High CFM Cooling Plenum 2n i prt E EL a Bison opp L Blower High CFM Cooling Plenum 0 None 3 z APTE Z Other 16 Accessories AS 8 Coil Options CO A DX Coil 4 Row Single Circuit B DX Coil 4 Row Dual Circuit C DX Coil 6 Row Single Circuit D DX Coil 6 Row Dual Circuit 9 Gas Type GT 1 Natural Gas 2 LP Gas Propane 3 Natural Gas w 100 Shutoff 0 None 10 Gas Control GC A Single Stage Gas Standard B Two Stage Gas H Electronic Modulation w Room Sensing J Electronic Modulation w Duct Sensing K Electronic Modulation w Duct Sensing amp Ovrd Stat L Electronic Modulation w External 4 20 mA Input Furnace One M Electronic Modulation w External 4 20 mA Input All Furnaces N Electronic Modulation w External 0 10 VDC Input Furnace One P Electronic Modulation w External 0 10 VDC Input All Furnaces R Two Stage Remote Temperature Control w Duct Sensor S Three Stage Remote Temperature Control w Duct Sensor T Four Stage Remote Tempera
21. 09 Stainless Steel All Furnace Sections E OA RA Mod Mtr w Mixed Air Control Min Pot SR 4 321 Stainless Steel First Furnace Only G OA RA Mod Mtr w Mixed Air Control 5 321 Stainless Steel All Furnace Sections H OA RA Mod Mtr w Mixed Air Control SR 6 409 Stainless Steel Package First Furnace Only J OA RA Mod Mtr w Min Pot 7 409 Stainless Steel Package All Furnace Sections K OA RA Mod Mtr w Min Pot SR 8 321 Stainless Steel Package First Furnace Only L OA RA Mod Mtr w Dry Bulb Mixed Air Control Min Pot 9 321 Stainless Steel Package All Furnace Sections M OA RA Mod Mtr w Dry Bulb Mixed Air Control Min Pot SR 0 None N OA RA Mod Mtr w Enthalpy Controlled Economizer SR Z Other P OA RA Mod Mtr w Pressure Control Space Pressure Q OA RA Mod Mtr w Carbon Dioxide CO R A Monitor 7 Rooftop Arrangement B L assumes furnace sections RA R OA RA Mod Mtr w S 350 P Proportional Mixed Air Control SR Re Duet p rnace Handler Standard S OA RA Mod Mtr w 0 10 8 4 20 mA Analog Input External Input B Blower Standard NeAipbandier Standard Plenum T OA RA Mod Mtr w 0 10 VDC amp 4 20 mA Analog Input SR External Input C Blower Standard Plenum P Air Handler Standard Evap U ASHRAE Cy OA RA 2 Pos Mtr w Warm up Stat SR D Blower Standard Evap R Air Handler Standard Evap Plenum Oe ee eee in
22. 1 322 351 328 301 PV25 43 75 134 72 8 21 1 293 348 324 273 69 3 21 1 322 345 322 301 RT30 54 75 134 74 6 26 1 331 417 380 302 71 1 26 2 365 412 377 334 PV30 54 75 134 739 _ 26 1 330 407 370 301 70 4 26 1 364 402 368 333 RT35 54 75 134 74 6 25 9 344 432 389 309 71 2 26 0 378 428 386 341 PV35 54 75 134 73 9 25 9 343 422 379 308 70 5 26 0 377 418 377 340 RT40 60 25 134 74 9 28 7 358 454 413 326 71 4 28 8 394 450 410 360 PV40 60 25 134 74 3 28 7 357 444 403 324 70 8 28 7 393 440 401 358 RT50 43 75 160 87 9 21 1 379 462 431 353 84 8 21 1 407 459 429 380 PV50 43 75 160 87 2 21 1 377 452 420 351 84 1 21 1 405 449 418 378 RT60 54 75 160 88 6 26 0 433 536 486 392 854 26 1 466 533 484 423 PV60 54 75 160 875 26 0 430 518 468 388 842 26 0 463 514 466 419 RT70 54 75 160 895 25 8 446 566 505 398 864 259 479 562 504 429 PV70 54 75 160 88 5 25 8 443 548 488 394 853 258 476 544 486 426 RT80 60 25 160 90 2 28 6 465 601 543 420 87 0 286 500 597 541 454 PV80 60 25 160 89 2 28 6 462 582 525 416 86 0 28 6 479 578 523 450 31 ARRANGEMENTS with DX Cooling Coil ARRANGEMENT with DX Cooling Coil Unit Without Outside Air Hood With Outside Air Hood Type Center of Gravity Corner Weights lbs Center of Gravity Corner Weights Ibs Capacity Width Length X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 X Coor Y Coor Corner 1 Corner 2 Cor
23. 12 397 359 372 RT40 60 25 160 83 0 287 400 431 392 365 79 2 288 435 427 390 398 40 60 25 160 824 28 7 398 422 384 362 787 288 433 419 382 395 RT50 43 75 186 97 1 21 1 407 444 414 379 93 7 21 1 435 442 413 406 PV50 43 75 186 96 5 21 1 403 435 405 376 93 1 21 1 431 433 404 403 RT60 54 75 186 97 9 26 0 468 520 472 425 94 5 26 1 501 517 470 456 PV60 54 75 186 97 0 26 0 462 504 456 418 93 6 26 1 495 501 455 449 RT70 54 75 186 978 259 489 542 485 437 945 259 522 538 483 468 PV70 54 75 186 960 258 483 526 469 431 93 6 259 516 522 468 462 RT80 60 25 186 98 2 288 510 571 524 468 94 9 289 545 568 523 501 PV80 60 25 186 975 288 505 556 509 462 94 1 28 8 539 552 507 495 32 XIII UNIT NUMBER DESCRIPTION Digit E x x 1 2 3 4 5 6 7 8 9 10 11 12113 1415 16117 Prefix UT CA FM RA CO SV MT MS Al AC AS Internal use Only 1 2 Unit Type UT 12 Motor Type MT RT Natural Vent Rooftop 1 Open Drip Proof Standard 4 Premium Efficiency Totally Enclosed PV Power Vented Rooftop 2 Totally Enclosed 0 None AH Air Handler 3 Premium Efficiency Open Drip Proof Z Other EV Evaporative Cooler Only 13 Motor Sizes MS 3 4 Capacity CA A 1 2 HP w Contactor M 1 1 2 HP w Mag Starter 1 1HP VFD Single Furnace Double Furnace B 3 4 HP w Contactor N 2 HP w Mag Starter 2 1 1 2 HP VFD 10 100 000 BTU HR 50 500
24. 134 76 3 25 7 352 465 413 313 72 9 25 8 386 461 411 344 PV60 54 75 134 754 257 348 448 396 308 72 0 25 8 382 443 394 340 RT70 54 75 134 76 1 25 5 372 489 427 325 72 9 25 6 406 484 425 356 PV70 54 75 134 75 2 25 5 368 471 410 320 72 0 25 6 402 466 408 352 RT80 60 25 134 762 28 3 393 518 460 349 73 0 284 430 514 458 383 80 60 25 134 75 4 28 3 389 500 443 344 72 1 28 3 426 496 441 378 12 60 25 160 90 4 28 6 492 640 577 444 87 5 28 6 527 636 575 477 PV12 60 25 160 895 28 5 485 615 553 435 865 28 6 520 611 551 469 ARRANGEMENTS J ARRANGEMENT J Unit Without Outside Air Hood With Outside Air Hood Type Center of Gravity Corner Weights Ibs Center of Gravity Corner Weights Ibs Capacity Width Length X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 RT20 43 75 134 66 8 20 9 283 281 257 259 63 1 20 9 312 278 255 286 PV20 43 75 134 66 4 20 9 282 277 252 257 62 7 20 9 311 273 250 284 RT25 43 75 134 67 3 20 9 294 296 271 269 63 8 21 0 323 293 269 297 PV25 43 75 134 67 0 20 9 292 292 267 267 63 4 20 9 321 288 265 295 RT30 54 75 134 68 1 25 6 344 356 313 303 64 6 25 7 378 351 311 334 PV30 54 75 134 67 7 25 6 341 348 306 299 64 1 25 7 375 344 304 331 RT35 54 75 134 673 25 4 363 366 316 313 639 25 4 397 362 314 344 PV35 54 75 134 669 253 360 358 309 310 634 254 394 354 307 341 RT40 60 25 134 675 282 380 386 339 334 64 0 28 2 416 381 336 367 40 60 25 134 67 1 2841 377 378 331 330 63 6 28
25. 2 413 373 329 364 RT50 43 75 160 814 21 0 372 385 356 344 78 210 400 383 354 371 PV50 43 75 160 810 210 368 377 348 339 77 7 210 396 374 346 367 RT60 54 75 160 82 7 25 9 430 459 412 385 79 4 25 9 463 456 410 417 PV60 54 75 160 820 258 423 445 397 378 78 6 259 456 441 396 409 RT70 54 75 160 81 8 25 7 454 475 419 401 78 7 25 7 487 471 417 432 PV70 54 75 198 81 1 25 6 447 460 405 393 77 9 25 7 480 456 403 425 RT80 60 25 160 819 28 5 482 505 452 431 78 8 28 5 517 501 451 465 PV80 60 25 160 813 284 475 490 438 424 78 1 28 5 510 486 436 458 RT12 60 25 186 96 0 287 584 624 566 530 93 1 28 7 619 620 564 563 PV12 60 25 186 932 285 544 547 491 488 90 0 28 6 579 543 489 521 ARRANGEMENTS K with Chilled Water Coil ARRANGEMENT K with Chilled Water Coil Unit Without Outside Air Hood With Outside Air Hood Type Center of Gravity Corner Weights Ibs Center of Gravity Corner Weights Ibs Capacity Width Length X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 RT10 32 75 134 70 1 15 8 254 279 260 237 66 7 15 8 278 276 258 260 10 32 75 134 70 0 15 8 254 278 259 237 66 7 15 8 278 276 257 260 15 32 75 134 71 4 15 9 254 291 274 240 68 1 15 9 279 288 272 263 PV15 32 75 134 71 2 15 9 254 288 271 239 67 8 15 9 278 286 270 263 RT20 43 75 134 72 2 21 1 287 336 312 267 68 7 21 1 316 332 310 295 PV20 43 75 134 71 7 21 1 287 330 306 266 68 2 21 1 315 327 304 294 RT25 43 75 134 73 2 21 1 293 354 330 274 69 8 21
26. 202 179 174 33 3 20 7 227 196 175 203 PV20 43 75 72 36 2 20 6 195 196 174 173 32 9 20 7 226 190 170 202 RT25 43 75 72 37 3 20 6 198 213 190 177 34 1 20 7 230 207 186 206 PV25 43 75 72 37 0 20 6 197 207 185 175 33 7 20 7 229 201 181 205 RT30 54 75 72 37 7 25 3 232 255 218 198 34 5 25 4 269 247 214 232 PV30 54 75 72 37 2 25 2 230 246 209 196 33 9 25 3 267 238 205 230 RT35 54 75 72 37 7 25 1 245 269 228 207 34 6 25 3 282 261 224 241 PV35 54 75 72 37 2 25 1 243 260 219 205 34 1 25 2 280 252 215 239 RT40 60 25 72 38 2 27 9 254 287 248 219 35 1 28 0 294 279 243 256 PV40 60 25 72 37 8 27 9 253 278 239 217 34 6 28 0 292 270 234 253 RT50 43 75 98 51 2 20 8 278 304 276 253 48 3 20 9 308 299 274 281 PV50 43 75 98 50 7 20 8 275 294 267 250 47 8 20 9 305 290 264 278 RT60 54 75 98 514 257 324 356 315 286 48 5 258 359 351 312 319 PV60 54 75 98 50 7 25 6 318 340 299 280 47 7 25 7 353 335 296 313 RT70 54 75 98 51 6 256 341 378 333 300 488 257 376 373 329 332 PV70 54 75 98 50 9 25 6 336 362 317 294 48 0 256 371 356 314 326 RT80 60 25 98 522 28 4 358 407 363 319 494 28 5 396 401 360 354 PV80 60 25 98 516 283 353 391 347 313 48 7 284 390 385 344 348 RT12 60 25 124 65 7 28 7 467 525 476 423 63 1 28 7 503 520 474 457 PV12 60 25 124 65 0 28 6 456 503 454 412 62 3 28 7 493 498 452 447 ARRANGEMENTS ARRANGEMENT Unit Without Outside Air Hood With Outside Air Hood Type Center of Gravity Corner Weights Ibs Center of Gravity Corner Weights Ibs Capacity Width
27. 53 1 2 1359 All Dimensions Shown Have Been Calculated To Include A One 1 Inch Clearance Around Return And Supply Ducts 10 15 20 25 50 30 35 60 70 40 80 12 Unit Type UT AH Blower Hi Coil 24 7 8 2211 87 1 16 or 40 y V 631 20 61 1 16 or 40 1551 20 87 1 16 2211 113 2871 Rooftop Arrangements D G Seal All Corners Seams amp Gaps S amp U Are Without a Return Air Dimensions For These Units Rooftop Openings Refer To Unit Submittals For More Detail Unit Base Side Rail Flange ae With Curb Cap 64 4 102 1 Gasketing Damper 12 See Detail K 305 Optional Insulation Wood Strip Curb Rail Cant ASS y Felt Y PPE D3809 2 Roof Section Curb Side Rail 1 7 8 22 L D3809 1 2 50 Anchor Location Field Supplied By Others 3 8 10 Clearance Should Be Maintained On Each Side To Insure Proper Installation Detail VENTINGT All venting installations shall be in accordance with the latest edition of Part 7 Venting of Equipment of the National Fuel Gas Code ANSI Z223 1 or applicable provisions of local building codes A WARNING The
28. 8 12 INSTALLATION AND SERVICE MANUAL RBM 8 J30 05381 PACKAGED ROOFTOP ARRANGEMENTS FOR HEATING COOLING AND VENTILATING SYSTEMS ATTENTION READ THIS MANUAL RISM MANUAL FACTORY INSTALLED OPTIONS MANUAL UNIT SUBMITTAL DATA SHEETS AND ALL LABELS ATTACHED TO THE UNIT CAREFULLY BEFORE ATTEMPTING TO INSTALL OPERATE OR SERVICE THESE UNITS CHECK UNIT DATA PLATES FOR TYPE OF GAS AND ELECTRICAL SPECIFICATIONS AND MAKE CERTAIN THAT THESE AGREE WITH THOSE AT THE POINT OF INSTALLATION RECORD THE UNIT MODEL NUMBER AND SERIAL NO S IN THE SPACE PROVIDED RETAIN THIS DOCUMENT FOR FUTURE REFERENCE Model No Serial No FOR YOUR SAFETY FOR YOUR SAFETY The use or storage of If you smell gas gasoline or other flammable 1 Don t touch electrical switches vapors or liquids in open 2 Extinguish any open flames containers in the vicinity of 3 Immediately call your this appliance is hazardous gas supplier A WARNING Improper installation adjustment alteration service or maintenance can cause property damage injury or death This appliance must be installed by a licensed contractor or qualified service personnel Read these installation operating and maintenance instructions thoroughly before installing or servicing this equipment A WARNING Install operate and maintain unit in accordance with manufacturer s instructions to avoid exposure to fuel substances or substances from incomple
29. 80 2099 2420 PV 80 2071 2432 27 ROOF TOP ARRANGEMENT RA L NET WT SHIP WT WT SHIP WT RT 10 1055 1344 PV 10 RT 15 1106 1395 PV 15 RT 20 1316 1617 PV 20 RT 25 1358 1659 PV 25 RT 30 1589 1903 PV 30 RT 35 1630 1944 PV 35 RT 40 1730 2051 PV 40 RT 50 1756 2096 PV 50 RT 60 2043 2397 PV 60 RT 70 2125 2479 PV 70 RT 80 2269 2630 PV 80 ROOF TOP ARRANGEMENT RA M 1062 1351 1098 1387 1307 1608 1348 1649 1575 1889 1615 1929 1716 2037 1736 2076 2015 2369 2095 2449 2241 2602 ROOF TOP ARRANGEMENT RA N OUTSIDE AIR HOOD W BIRD SCREEN WEIGHT AD DER Capacity CA Weight 10 43 15 43 20 51 25 51 30 59 35 59 40 63 50 51 60 59 70 59 80 63 ROOF TOP ARRANGEMENT RA P Capacity CA NET WT SHIP WT Capacity CA NET WT _ SHIP WT Capacity NET WT SHIPWT 20 403 616 20 529 705 20 609 822 40 513 744 40 665 855 40 769 1000 ROOF TOP ARRANGEMENT RA R ROOF TOP ARRANGEMENT RA S ROOF TOP ARRANGEMENT RA T Capacity CA NET WT SHIP WT Capacity CA NET WT SHIPWT Capacity CA _NET WT _ SHIP WT 20 735 959 20 635 847 20 788 1012 40 921 1161 40 793 1023 40 967 1207 ROOF TOP ARRANGEMENT RA U ROOF TOP ARRANGEMENT RA W Capacity CA NET WI Capacity CA NET WT _ SHIPWT 20 797 1021 20 936 1198 40 987 1227 40 1152 1432 Double Wall Construction Adder For units ordered with double wall constru
30. BTU F kg _kw _ Are all panels doors vent caps in place Has the unit suffered any external damage Damage Does the gas piping and electric wiring appear to be installed in a professional manner Has the gas and electric been inspected by the local authority having jurisdiction Is the gas supply properly sized for the equipment Were the installation instructions followed when the equipment was installed Have all field installed controls been installed Qo L Do you understand all the controls on this equipment f not contact your wholesaler or rep DO NOT START this equipment unless you fully understand the controls GENERAL GAS HEATING With power and gas off With power and gas on Make certain all packing has been removed 1 Inlet gas pressure inW C or kPa o Tighten all electrical terminals and connections Pilot amp main burner ignition 1 Check damper linkages for tightness L1 Manifold gaspressure in W C or _ kPa Check all fans amp blowers for free movement L1 Cycle on HIGH LIMIT 1 Check all controls for proper settings Cycle firestat and or freezestat 1 Check all set screws on blowers and bearings Check electronic modulation Set at Check belt tightness 1 Cycle and check all other controls not listed BLOWER 1 Check operation of remote panel With power on and gas off L Entering air temp F or L1 Check voltage 11 L2 L3
31. Box Locations RETURN AIR Disconnect Box Located On Intake End Panel Return Air Only RETURN AIR Disconnect Box Located On Outside Air Hood SUPPLY AIR D3866 Disconnect Box Located On Supply Plenum End Panel DX COIL EQUIPPED UNITS OPTIONAL See Coil Installation Maintenance Manual for Refrigerant Piping Liquid and Suction Line Components Refrigerant Charging and Thermal Expansion Valve Adjustment Remove coil cabinet access door located next to blower section Cut holes in fixed door to allow suction and liquid line passage Provide weatherproof seal around suction and liquid lines at piping plate when installed The DX Coil has a 300 ft min 1 524 m s minimum and a 600 ft min 3 048 m s maximum velocity through the coil requirement This is due to prevention of coil icing or condensate blow off To calculate the velocity through the coil apply the following formula Velocity through the coil Cooling Air Flow in CFM m s Coil Surface Area in ft m Condensate Drain piping must have a P trap in line immediately downstream of drain pan connection external to the unit to prevent possible outside air leakage into unit The P trap shall be of sufficient differential to overcome negative pressure of the indoor air blower A minimum height difference of 2 inch is required See Figure 12 Before unit operat
32. GES 9 16 2 7 16 a 14 1 62 102 f 1 V SKID HEIGHT F x lt CURB 5 1 16 13 9 16 h 18 7 8 X D INSIDE OPENING 1 TYP 383 344 z 479 9 16 14 1 7 8 X D OUTSIDE DAMPER 3 16 25 479 DIMENSION 5 1 1 ROOF OPENING GOE UNE ROOF OPENING INE DETAIL B DETAIL C D4490FR Figure 7 Unit Curb End Rail Assembly 3809 3 ix 7 Pes 5 SSS Se w T nag i 2 _ iacent we MM Curb Cap End Adaptor Supplied with the Unit one each end Unit Base Rail Assembly For Field Installations These Crossbrace Curb Adapters 2 adapters ship with each rooftop arrangement must be repositioned in the field when the unit is mounted on a curb or a platform one for each end Simply remove the screws turn the piece over end for end and secure in place using the holes hardware provided All joints and seams must be sealed completely in the field to prevent leaks Figure 8 Roof Curb Specifications 20 7 8 530 gt kk 20 7 8 530 Supply Air Opening Unit Specifications References Rooftop Arrangement BI Supply FURNACE 5 Plenum High 50 7 8 1292 Unit Type UT RT PV or AH Dimension E Capacity CA 26 660 37 940 48 1219
33. T SHIP WT RT 10 835 1072 PV 10 842 1079 RT 20 982 1206 PV 20 973 1197 RT 15 886 1123 PV 15 878 1115 RT 25 1025 1249 PV 25 1015 1239 RT 20 1037 1284 PV 20 1028 1275 RT 30 1218 1452 PV 30 1204 1438 RT 25 1078 1325 PV 25 1068 1315 RT 35 1261 1495 PV 35 1246 1480 RT 30 1244 1502 PV 30 1230 1488 RT 40 1343 1583 40 1329 1569 RT 35 1294 1552 PV 35 1279 1537 RT 50 1427 1689 PV 50 1407 1669 RT 40 1389 1652 40 1375 1638 RT 60 1677 1951 PV 60 1649 1923 RT 50 1499 1785 PV 50 1479 1765 RT 70 1759 2033 70 1729 2003 RT 60 1722 2020 PV 60 1694 1992 RT 80 1886 2166 PV 80 1858 2138 RT 70 1812 2110 70 1782 2080 RT 12 2420 2741 PV 12 2376 2697 RT 80 1953 2257 PV 80 1925 2229 ROOF TOP ARRANGEMENT RA J ROOF TOP ARRANGEMENT RA K WT SHIP WT WT SHIP WT NET WT SHIP WT WT SHIP WT RT 20 1116 1378 PV 20 1107 1369 RT 10 886 1137 PV 10 893 1144 RT 25 1157 1419 PV 25 1147 1409 RT 15 937 1188 PV 15 929 1180 RT 30 1367 1641 PV 30 1353 1627 RT 20 1132 1394 PV 20 1123 1385 RT 35 1409 1683 PV 35 1394 1668 RT 25 1174 1436 PV 25 1164 1426 RT 40 1499 1779 40 1485 1765 RT 30 1385 1659 PV 30 1371 1645 RT 50 1597 1898 PV 50 1577 1878 RT 35 1428 1702 PV 35 1413 1687 RT 60 1863 2177 PV 60 1835 2149 RT 40 1519 1799 40 1505 1785 RT 70 1944 2258 PV 70 1914 2228 RT 50 1614 1915 PV 50 1594 1934 RT 80 2079 2400 PV 80 2051 2372 RT 60 1881 2195 PV 60 1853 2207 RT 12 2620 2981 PV 12 2576 2937 RT 70 1964 2278 70 1934 2288 RT
34. T 25 405 524 PV 25 395 514 RT 25 781 957 PV 25 771 947 RT 30 469 596 PV 30 455 582 RT 30 907 1092 PV 30 893 1078 RT 35 510 637 PV 35 495 622 RT 35 958 1143 PV 35 943 1128 RT 40 558 690 PV 40 543 675 RT 40 1032 1222 PV 40 1018 1208 RT 50 795 952 PV 50 777 934 RT 50 1195 1423 PV 50 1175 1403 RT 60 914 1081 PV 60 885 1052 RT 60 1377 1616 PV 60 1349 1588 RT 70 994 1161 70 964 1131 RT 70 1468 1707 PV 70 1438 1677 RT 80 1087 1259 PV 80 1058 1230 RT 80 1589 1833 PV 80 1561 1805 RT 12 1617 1820 PV 12 1573 1776 ROOF TOP ARRANGEMENT RA C ROOF TOP ARRANGEMENT RA D WT SHIP WT NET WT SHIP WT WT SHIP WT WT SHIP WT RT 10 705 923 PV 10 712 930 RT 10 705 904 PV 10 712 911 RT 15 756 974 PV 15 748 966 RT 15 757 956 PV 15 749 948 RT 20 884 1112 PV 20 875 1103 RT 20 893 1102 PV 20 884 1093 RT 25 925 1153 PV 25 915 1143 RT 25 935 1144 PV 25 925 1134 RT 30 1068 1307 PV 30 1054 1293 RT 30 1083 1301 PV 30 1069 1287 RT 35 1117 1356 PV 35 1102 1341 RT 35 1134 1352 PV 35 1119 1337 RT 40 1201 1445 40 1187 1431 RT 40 1220 1443 40 1206 1429 RT 50 1345 1598 PV 50 1325 1578 RT 50 1348 1595 PV 50 1328 1575 RT 60 1546 1811 PV 60 1518 1783 RT 60 1554 1812 PV 60 1526 1784 RT 70 1636 1901 70 1606 1871 RT 70 1644 1902 PV 70 1614 1872 RT 80 1765 2034 PV 80 1737 2006 RT 80 1777 2040 PV 80 1749 2012 ROOF TOP ARRANGEMENT RA E ROOF TOP ARRANGEMENT RA G NET WT SHIP WT WT SHIP WT WT SHIP WT W
35. TE PEODP PETE Motor type MT Legend 1 2 HP 22 18 ODP Open Drip Proof 3 4 HP 20 22 TE Totally Enclosed 1 HP 28 26 33 38 PEODP Premium Efficiency Open Drip Proof TOME HE ao PETE Premium Efficiency Totally Enclosed 2 HP 46 48 3 HP 66 69 5 HP 74 91 7 1 2 HP 114 143 10 HP 145 153 15 HP 234 302 29 CENTER OF GRAVITY Figure 16 RT NATURAL VENT PV POWER VENT CORNER 4 CORNER 3 AIR FLOW i CENTER OF GRAVITY l e aa 0 02 i CORNER 1 CORNER 2 TOP VIEW Values Based on Average Motor Weight Actual Center of Gravity and Corner Weights For Specific Motor Size are Available Upon Request ARRANGEMENTS B ARRANGEMENT B Unit Without Outside Air Hood With Outside Air Hood Type Center of Gravity Corner Weights lbs Center of Gravity Corner Weights lbs Capacity Width Length X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 X Coor Y Coor Corner 1 Corner 2 Corner 3 Corner 4 RT10 32 75 72 35 9 15 4 161 160 141 142 32 6 15 4 187 154 138 167 PV10 32 75 72 35 8 15 4 161 159 141 142 32 5 15 4 187 154 137 167 RT15 32 75 72 36 9 15 4 163 171 153 145 33 7 15 5 190 166 149 170 PV15 32 75 72 36 7 15 4 163 169 150 145 33 5 15 5 189 164 147 170 RT20 43 75 72 36 6 20 6 196
36. Terminal Block Thermostat connections are made at the Main Connection Board See Figure 10 A CAUTION not use any tools i e screwdriver pliers etc across terminals to check for power Use of a voltmeter is recommended Figure 9 Standard Blower Cabinet Single Duct Furnace with Supply Plenum amp Various Options Shown Intake Hood Dampers Filters Blower Cabinet Duct Furnace Electrical Cabinet Supply Plenum 12 Mixed Air Controller Return Firestat Economizer Filters Blower Motor Reverse Air Flow Switch Clogged Filter Switch High voltage Barrier and Lamp 13 and Circuit Breaker Mount Main Connection Board with Fan Time Delay and Func tion Relays D3825 10 Power Ventor Relay 11 Freezestat 12 Supply Firestat 13 Duct Thermostat 14 Primary Safety Limit 15 Power Ventor Motor 16 Gas Piping Inlet 17 Gas Valve 18 High Limit Safety Switch 19 Transformer Power Vent PV unit shown 44 UI Electrical Wiring Inlet High Voltage Terminal Block Door Safety Switch Contactor 24 Centrifugal Blower Assembly 25 Damper Motor 26 Outside and Return Dampers 27 Enthalp
37. USE SPREADER BAR TO PREVENT DAMAGE TO UNIT USE SPREADER BAR TO PREVENT DAMAGE TO UNIT COMBUSTION AIR CONSIDERATIONS The presence of chlorine vapors or other corrosive vapors in the combustion air supply for gas fired heating equipment presents a potential corrosive hazard Chlorine will when exposed to flame precipitate from the compound usually freon or degreaser vapors and go into solution with any condensation that is present in the heat exchanger or associated parts The result is hydrochloric acid which will readily attack all metals including 300 grade stainless steel Care should be taken to separate these vapors from the combustion process This may be done by wise location of the unit with regard to exhausters or prevailing wind direction LOCATION Before placing rooftop unit in its permanent location make certain that the roof is capable of carrying the additional load of this equipment Check the unit weight given at the end of this manual Refer to Figure 2 amp 3 for required clearances to combustible material AWARNING Do not place unit in a location where service personnel can not safely service this equipment i e roof edge skylights etc or personal injury could result NOTICE If your unit is equipped with N2 through the base utilities and or N3 service convenience package refer to Submittal GAN2 review in entirety before mounting the unit MOUNTING LOCATIONS These un
38. al ground union for each duct furnace A 1 8 inch N P T plugged tapping accessible for test gauge connection must be installed immediately upstream of the unit gas supply connection tt For complete Gas Piping installation see Outdoor Rooftop Gas Fired Duct Furnace Installation and Service Manual and if applicable the Factory Installed Options Manual It is recommended that the gas piping not be installed through the bottom of the duct furnace bottom panel If piping must penetrate the duct furnace bottom panel it must be sealed to prevent water leakage Gas piping must be installed to allow for removal of burner drawer for unit maintenance A WARNING To avoid equipment damage or possible personal injury do not connect gas piping to this unit until a supply line pressure leak test has been completed Connecting the unit before completing the pressure leak test may damage the unit gas valve and result in a fire hazard 4 CAUTION Do not rely on a gas shutoff valve to isolate the unit while conducting gas pressure leak tests These valves may not be completely shutoff exposing the unit gas valve to excessive pressure resulting in damage 4 CAUTION Do not over tighten the inlet gas piping at unit gas valve or stresses that could crack the valve may result A WARNING Never use an open flame to detect gas leaks Explosive conditions may exist which would result in personal injur
39. al valve 2 Set thermostat to lowest setting 3 Shut off all electric power GAS INPUT ADJUSTMENT When shipped from the factory all units are equipped for the average heat content of the gas which is stamped on the unit rating plate A CAUTION Since the heat content of gas varies by locality the input must be checked after installation of the unit If the unit is overfired it will shorten the life of the heat exchanger Never exceed the input on the rating plate For an accurate input rate measurement the following meter method should be used to determine unit input rate If the meter method is not possible a manifold pressure check should be made Meter Method of Checking Input Rate 1 Obtain the heating value of the gas from the local utility or gas dealer This should be in units of Btu ft MJ m 2 Determine the gas flow rate as shown in the following example EXAMPLE Assume this unit has a input rate of 250 000 Btu hr 73 2 kW and the heating value of the gas is 1000 Btu ft 37 3 MJ m eus 250 000 Btu hr 73 2 kW OW Rate 1000 Btu f 37 3 MJ m x 60 min hr 4 17 ft min 1 974 L s 3 Before determining the gas flow rate to the unit all other gas appliances connected to the same meter must be turned off 4 Fire unit according to instructions 5 After approximately 15 minutes of unit operation determine volume of gas used in five minutes of unit operation For the Example above the unit
40. am s factory installed service convenience options manual if applicable to unit order and special controls data sheets NOTICE It is the owner s responsibility to provide any scaffolding or other apparatus required to perform emergency service or annual periodic maintenance to this equipment I GENERAL SAFETY REQUIREMENTS AWARNING Open all disconnect switches before installing the unit Failure to do so may result in personal injury or death from electrical shock A WARNING Failure to comply with the general requirements may result in extensive property damage severe personal injury or death A WARNING This product must be installed by a licensed plumber or gas fitter when installed within the Commonwealth of Massachusetts A WARNING po not alter the duct furnace in any way or damage to the unit severe personal injury or death will occur A WARNING Never service any component without first disconnecting all electrical and gas supplies to the unit or severe personal injury or death may occur CAUTION insure that all power sources conform to the unit requirements or damage to the unit may result For all units that are equipped with gas fired outdoor duct furnaces certified by ETL installation must be made in accordance with local codes or in the absence of local codes with the latest edition of ANSI Standard Z223 1 N F P A
41. and main burner operators of the gas valve ceasing all gas flow 8 Approximately two minutes after satisfying the thermostat fan operation ceases OPTIONAL GAS CONTROLS These units are available with optional gas controls which will give either multi stage or modulating operation The sequence of operation of those units equipped with these optional gas controls differs only at what rate each duct furnace s main burners ignite and operate at or the order of duct furnace firing for those units equipped with two or three duct furnaces Two Stage Units Two stages of heating first stage is 40 of full rate second stage is 100 of full rate Main burner ignition is at first stage only Three Stage Units Dual duct furnace models First furnace is equipped with two stage heating second furnace is equipped with a single stage heating but fired independantly giving three stages of heating Triple duct furnace models Each duct furnace is equipped with single stage heating but fired independently giving three stages Each stage is 33 of the unit s full input rate Duct furnace one will always light first and disengage last Four Stage Units Dual duct furnace models only Each duct furnace is equipped with two stage heating but fired independently giving four stages Each stage is 2596 of the units full input rate Duct furnace one will always light first and disengage last 14 Six Stage Units Triple duct furnace models only Ea
42. appliance combination control Remove the 1 8 inch pipe plug on the inlet side of the combination control and connect a manometer to that tapping Turn the manual valve on to apply pressure to the combination control Note the pressure reading on the manometer then turn the valve off A loss of pressure indicates a leak If a leak is detected use a soap solution to check all threaded connections If no leak is found combination control is faulty and must be replaced before putting appliance back in service These units have been developed for outdoor installation Maintenance is required and it is suggested that the following unit servicing and inspections be performed routinely Also read in entirety and refer to the Outdoor Duct Furnace Manual for maintenance requirements A WARNING Service technician s responsibility All safety controls must be checked Check and test the operational functions of all safety devices supplied with this unit Failure to do so could result in unsafe conditions and may result in death serious injury or property damage Inspect area near unit to be sure that there is no combustible material located within the minimum clearance requirements See Figure 2 Service panels provide easy access to the gas controls located in duct furnace section the blower compartment the electrical cabinet and the supply plenum To remove the service door from any of these compartments refer to access panel
43. as been in operation for at least 15 minutes adjust the primary air flow to the burners Turn the friction locked manually rotated air shutters clockwise to close counter clockwise to open For correct air adjustment close the air shutter until yellow tips in the flame appear Then open the air shutter to the point just beyond the position where yellow tipping disappears CONTROLS Primary Limit Control The primary limit control is a factory installed component surface mounted in the inlet airstream at the end of the heat exchanger When the temperature reaches the limit setpoint normally caused by insufficient air throughput all gas is shutoff The limit control has an automatic reset and once the unit has cooled it will reset itself This is a safety control and if cycling on the primary limit is noted corrective action must be taken See unit wiring diagram for electrical location This control must never be bypassed Upon completion of unit installation the primary limit must be checked for proper operation This can be accomplished by removing power to the indoor air blower and a call for heat Draftor End Switch This switch is located at the end of the draftor motor and is integral to the motor The switch which is normally open will close when draftor motor attains the minimum speed for proper combustion allowing main burner operation The pilot burner will light without a proven draftor end switch See unit wiring diagram for
44. ater in any manner while in operation or just after it has been turned off as some parts may be hot enough to cause injury This heater is intended for general heating applications ONLY It must NOT be used in potentially dangerous locations such as flammable explosive chemical laden or wet atmospheres In cases in which property damage may result from malfunction of the heater a backup system or a temperature sensitive alarm should be used The venting is an integral part of the unit and must not be altered in the field The Natural Vented units are equipped with a ventcap which is designed for natural draft venting Air for combustion enters the base of the vent cap through a protective grill and products of combustion are discharged at the upper section of the vent cap This vent cap is shipped in a separate carton and should be installed per the Venting section of the Outdoor Rooftop Gas Fired Duct Furnace Installation and Service Manual The Power Vented unit has a induced draft venting system The combustion air inlet and products of combustion discharge grills are located in the upper section of the Duct Furnace side access panel A pilot burner plate is provided in the Duct Furnace for access to the pilot burner and ignition system without removing the burner drawer Clearance between the external unit and any obstruction must be sufficient for proper servicing of pull out burner drawer See Figure 2 amp 3 for this clearance
45. ation Instructions 2 I GENERAL REQUIREMENTS 3 5 PRIQQUING eS 4 Combustion Air Considerations 4 EO CALION uu naa mn 5 Mounting LOG8ll0lS u uu L 5 INSTALLATION Installation Clearances 6 Mounting on Field Furnished Supports 6 Mounting on Roof Curb 6 7 8 9 Access Panel 6 VOnUNG as 10 Duct 10 Gas PIPING 10 11 Modulating Gas Control 11 Electrical 11 13 DX Coil Equipped Units 13 Chilled Water Coil Equipped 13 Evaporative Cooling Equipped Units 13 OPERATION General Information esses 14 Gas Control System 14 Optional Gas Controls 14 15 Air Handling Requirements and Adjustments 15 16 mp 16 Gas Input 16 17 Pilot
46. ators which provide gas to the pilot and main burners Both operators are energized and de energized by the ignition control module each heating cycle The pilot burner includes an ignitor and flame sense probe The ignitor provides the spark originating at the ignition control module to light the pilot The ignition control module proves and monitors the pilot flame through the flame sensing probe All units follow the same basic sequence of operation and is as follows 1 Thermostat calls for heat Power vented units only Draftor relay energizes draftor with call for heat 2 Ignition control module energizes pilot operator of gas valve and initiates spark at ignitor of the pilot burner 3 Pilot burner ignition is proven to the ignition control by the flame sense probe and sparking of the ignitor is discontinued 4 Once pilot burner operation is proven the ignition control module energizes the main burner operator of the gas valve allowing gas flow to the main burners Power vented units only In addition draftor operation must be proven by draftor end switch before ignition control module energizes main burner operator of gas valve 5 Approximately 60 seconds after the main burners light the fan time delay initiates fan operation 6 Thermostat is satisfied and call for heat is removed Power vented units only Draftor relay de energizes draftor with removal of call for heat 7 Ignition control module de energizes pilot
47. ch duct furnace is equipped with two stage heating but fired independently giving six stages Each stage is 16 5 of the units full input rate Duct furnace one will always light first and disengage last Electronic Modulation Units These units are equipped with a electronic modulating control which provides unit firing capabilities of 40 to 100 of the units full input rate This control is found in the gas train downstream of the gas valve and allows main burner ignition only at the maximum rate A thermostat with remote setpoint adjustment modulates the gas input Multi Stage w Electronic Modulation Units These dual and triple duct furnace models are equipped with an electronic modulating control on duct furnace one and single or two stage heating on each successive duct furnace Furnace one modulated will fire first and disengage last Additional stages of heat will engage after furnace one has fired at maximum modulation capability for the duration of the delay setting The amount of modulation and each stage size depends upon unit size and the number of stages See following chart Modulation Stage Number Capabilities Size of Stages of full input of full input 2 25 50 50 3 16 5 33 33 4 25 50 25 6 16 5 33 16 5 AIR HANDLING REQUIREMENTS AND ADJUSTMENTS 4 CAUTION Remove wooden shipping support from beneath blower housing of Blower Section to prevent possible unit damage or improper unit operati
48. ction add an additional 10 to the base unit weight Cooling Coil Weight Adder DX COIL CHILLED WATER COIL CA Capacity 4 Row 6 Row 4 Row 6 Row 10 15 97 Ibs 132 Ibs 75 lbs 102 lbs 20 25 50 126 Ibs 177 165 98 Ibs 135 Ibs 30 35 60 70 165 Ibs 229 lbs 125 lbs 176 lbs 40 80 177 165 249 lbs 135 Ibs 196 Ibs 28 MOTOR SHIPPING WEIGHTS APPROMIMATE 1 115 1 60 2 208 1 60 3 230 1 60 1 2 3 4 1 2 3 4 1 2 3 4 ODP TE PEODP PETE ODP TE PEODP PETE ODP TE PEODP PETE 1 2 HP 20 24 32 30 21 24 32 21 24 32 30 3 4 HP 23 30 30 41 23 30 30 25 30 30 41 32 32 40 44 32 32 32 32 40 44 1 1 2 HP 40 41 47 57 40 41 40 41 47 57 2 HP 42 67 65 64 50 67 42 48 65 64 3 HP 78 86 78 86 78 86 90 5 HP 87 87 99 95 7 1 2 HP 134 138 134 138 10 HP 165 140 161 15 HP 4 208 3 60 5 230 3 60 6 460 3 60 1 2 3 4 1 2 3 4 1 2 3 4 ODP TE PEODP PETE ODP TE PEODP PETE ODP TE PEODP PETE 1 2 HP 19 18 22 22 19 18 22 22 19 18 22 22 3 4 HP 27 26 27 27 22 27 31 27 22 27 31 24 26 36 37 24 26 36 37 24 26 36 37 1 1 2 28 34 40 42 28 34 40 42 28 34 40 42 2 HP 35 46 49 35 42 46 49 35 42 46 49 3HP 48 69 69 48 69 69 48 69 69 5 HP 76 77 76 77 76 77 7 1 2 HP 117 136 117 136 117 136 10 HP 128 158 128 0 158 128 158 15 HP 217 255 217 255 217 255 7 75 3 60 1 2 3 4 ODP
49. d result in death serious injury or substantial property damage A CAUTION Indicates an imminently hazardous situation which if not avoided may result in minor injury or property damage NOTICE Used to notify of special instructions on installation operation or maintenance which are important to equipment but not related to personal injury hazards RECEIVING INSTRUCTIONS Inspect shipment immediately when received to determine if any damage has occurred to the crate during shipment After the unit has been uncrated check for any visible damage to the unit Check motor position and turn blower wheel to determine if damage has occurred to these critical parts If any damage is found the cosignee should sign the bill of lading indicating such damage and immediately file claim for damage with transportation company PRE INSTALLATION INSTRUCTIONS When the unit is received and uncrated check the external data plate and all labels on the unit for type of gas electrical and operational specifications to confirm that these agree with those at point of installation If the unit is equipped with an Outdoor Duct Furnace also check the data plate and all labels located inside each furnace Every rooftop unit will include an informational packet which will include the following The blower manual outdoor duct furnace and evaporative cooler cooling coil manuals if applicable to the unit order wiring diagr
50. e casing to indicate the presence of leaks in the heating element The covers for the panels shall be attached in such a manner as to prevent leaks Ducts exposed to the outdoors must be insulated and sealed to prevent water from entering either the unit or building through the duct If a single double or triple duct furnace only unit is connected to a return air duct or any other inlet air restriction the appliance shall be installed on the positive pressure side of the air circulating blower When connecting return air duct to Standard or High CFM cabinets attach duct to return air opening flange when no dampers are used Otherwise if dampers are used attach return air duct around collar at bottom of damper assembly Also refer to the Submittal Data Sheets specified for your unit 10 When connecting supply air duct to Supply Plenum attach duct to supply air opening flange when no dampers are used Otherwise if dampers are used attach supply air duct around collar at bottom of damper assembly GAS PIPINGTT All gas piping must be installed in accordance with local codes It is required that a ground union be installed adjacent to the gas valve of each duct furnace and a ground union be installed just external of each duct furnace for unit servicing On vertical runs a drip leg should be provided upstream of any control manifold A gas shutoff valve should be or may be required by local codes installed upstream of the extern
51. er 12 CELdek Media C3 Evap Cooler Freezestat w o Time Delay C4 Evap Cooler 8 GLASdek Media C5 Evap Cooler 12 GLASdek Media L1 30 Amp Fused Disconnect Switch f 12 30 Amp Non Fused Disconnect Switch f L3 60 Amp Fused Disconnect Switch T D1 Time Clock 7 L4 60 Amp Non Fused Disconnect Switch f D2 Time Clock 24 Hourf N2 Through the Base Utility Penetration N3 Service Convenience Package N6 Double Wall Construction E1 Clogged Filter Switch E2 G F l Convenience Outlet 115VAC t Remote Control Panelf E4 Manual Blower Switch R1 Field Installed VFD R2 Factory Installed VFD R3 VFD Remote Keypad for use with w R1 R4 CO Sensor 100 R5 CO Sensor Mixed Airt R6 Pressure Sensorf R7 2 Speed VFD Relays R8 3 Speed VFD Relays F1 Ductstat F2 Ductstat One Stagef Two Staget G1 Thermostat T87K w Subbaset G2 Thermostat T87K w Subbase amp Guard G3 Thermostat T834N w Subbase Sterling Stat G4 Thermostat TB8220U 7 Day Programmable G5 Thermostat TH5220D Two Stage f G6 Locking Thermostat Covert Note All thermostats are mercury free 0 None Z Other Specify Field Installed ENGINEERED PRODUCTS ROOFTOP ARRANGEMENTS RA
52. h 73 2 kW 4 300 MBtuh 87 9 kW 4 2 350 MBtuh 102 6 kW 4 2 400 MBtuh 117 2 kW 6 500 MBtuh 146 5 kW 4 600 MBtuh 175 8 kW 4 2 700 MBtuh 205 1 kW 4 2 800 MBtuh 234 4 kW 6 19 AIR BLOWER Belt Tension Adjustment Standard CFM Blower belt tension can be adjusted by loosening motor mounting bolts marked A See Figure 14 To tighten belt slide motor down motor mounting bracket and re fasten motor to mounting bracket High CFM Blower belt s tension can be adjusted by first loosening motor mounting plate bolts marked A See Figure 14 To tighten belt tension turn belt tension adjustment screws marked B See Figure 14 counter clockwise To loosen belt tension turn clockwise Once belt tension has been adjusted re fasten motor mounting plate bolts Blower RPM Adjustment To adjust blower RPM 1 Loosen and remove belt s 2 Match driver pulley to one found in Figure 15 3 Loosen setscrew s marked A 4 If driver pulley is equipped with external key marked B remove Adjust driver pulley pitch diameter for desired speed by opening slower or closing faster moving parts by half or full turns Do not open sheave past point where flange projects past the hub end 6 If driver pulley is equipped with external key marked B replace 7 Tighten setscrew s marked A Replace and retension belt s Realign drive if necessary Figure 15 Figure 14 STANDARD CFM BLOWER
53. ion begins the P trap must be primed with either water Summer or glycol winter CHILLED WATER COIL EQUIPPED UNITS OPTIONAL See Coil Installation Maintenance Manual for General Coil Piping Recommendations Remove the coil cabinet door and cut holes in door to allow chilled water piping passage Provide weatherproof seal around chilled water pipes at piping plate when installed The Chilled Water Coil has a 600 ft min 3 048 m s maximum velocity through the coil requirement This is due to prevention of condensate blow off To calculate the velocity through the coil apply the following formula Velocity through the coil Cooling Air Flow in CFM m s Coil Surface Area in ft Condensate Drain piping must have a P trap in line immediately downstream of drain pan connection external to the unit to prevent possible outside air leakage into unit The P trap shall be of sufficient differential to overcome negative pressure of the indoor air blower A minimum height difference of 2 inch is required See Figure 12 Before unit operation begins prime P trap with either water summer or glycol winter Figure 12 Drain Pan Connection DRAIN PAN CONNECTION UNIT 2 MIN D3887 EVAPORATIVE COOLER EQUIPPED UNITS OPTIONAL Refer to Evaporative Cooler Installation and Service Manual for water and electrical connections 13 IV OPERATION GENERAL INFORMATION Refer to Outdoo
54. ion belts Replace belts if damaged Worn pulleys Replace pulleys Pulley Misalignment Realign drive 3 Belt Squeal Excessive load High starting load Retension drive 4 Belt Breakage Foreign material in drive Provide drive guard Belts damaged during installation Replace belts Extreme Overload Eliminate overload 5 Excessive Vibration Damaged belt cord section Replace belts Loose belts Tension drive Belts improperly tensioned Tension drive with slack of each belt on the same side of drive 24 PROBLEM PROBABLE CAUSE SOLUTION 6 Belts mismatched Belts improperly tensioned causing Replace belts and tension drive with slack of each after service more stretch of some belts than others belt on the same side of the drive Old belts and new belts used Replace with new belts on same drive Different brand name belts used Replace with a set of Machine Matched Belts on same drive Driver and driven shafts shifted Realign drive from parallel Belt cord section damaged during Replace belts and install properly installation 7 Drive fails to adjust Fretting corrosion drive allowed to Driver pulley must be disassembled operate at one speed over a period cleaned and lubricated then of time reassembled TROUBLESHOOTING GUIDE DX COOLING COIL PROBLEM PROBABLE CAUSE SOLUTION 1 No or Insufficient Coil icing a Low liquid line pressure Cooling b Thermal expansion valve c Low ai
55. ir Check outside air dampers 2 Water in Conditioned Air Exceeding coil face velocity 600 fpm Reduce unit air flow Drain pan P trap clogged Refer to Manufacturer s Installation and Service Manual Vill REPLACEMENT PARTS To order Replacement Parts please provide the following information to your local representative Model Number Serial Number Partdescription and Number as shown in Replacement Parts Literature If further assistance is required please contact the manu facturer s customer service department Clean pan and p trap IX SERVICE NOTE Due to the many configurations options and voltage characteristics available on Rooftop Packaged Units the information provided in this manual is somewhat general in context Should user or service organization incur a problem the nature of which is not herein we urge you to contact the manufacturer It would be of great assistance to us if you can provide the model and serial numbers and the wiring diagram number as well as the access type X LIMITED WARRANTY All components are warranted by the manufacturer to be free from defects in material and workmanship for period of one 1 year from the date of shipment from the manufacturing plant The manufacturer will repair or replace at its option any component which upon inspection it finds to be defective provided that the Rooftop Packaged Unit has been operated within its listed capac
56. its are suitable for installation on combustible flooring Single double and triple duct furnace only models have base rails which can be mounted either on solid planking or steel channels All other units installed on field furnished supports must use the recommended method shown in Mounting on Field Furnished Supports or equivalent Roof curb kits for rooftop units are shipped unassembled Included with the roof curb kit are insulated or uninsulated curb rails bolts and screws needed for assembly sealant a roll of self adhering rubber gasketing and installation instructions Roof insulation cant stripping flashing roof felts caulking and nails must be furnished by the installer See separate roof curb specifications See Figures 5 6 7 amp 8 for roof curb information Figure 2 Minimum Clearances to 18 000 457 Combustible Material or Obstructions 36 000 3125 8 TYP 914 18 000 457 _ 8125 I 8 CLEARANCE NATURAL OR POWER VENT FURNACE FOR DRAWER PULL OUT Figure 3 Note The unit is equipped with hinged access doors allow 36 inches minimum for clearance on access side to fully open door and lock in an open position 4 457 mm AIR FLOW D3865 Duct Furnace Duc
57. ity has been installed in accordance with all furnished instruction has not been misused or subjected to neglect and has received reasonable and necessary maintenance This warranty does not cover labor costs or other costs incurred in repairing removing installing servicing or handling of parts or completed products This Warranty does not cover loss due to corrosion by chemicals precipitated in the air such as halogenated hydrocarbons The manufacturer will in no event be liable for incidental or consequential damages of any kind whatsoever Written permission is required prior to the return of defective components All returns must be sent with all transportation charges prepaid to the plant designated in the written permission This warranty is extended only to the original owner of the Rooftop Package Unit 26 XI UNIT amp SHIP WEIGHTS NOTE ALL UNIT WEIGHTS ARE LESS MOTOR OUTSIDE AIR HOOD AND COOLING COILS W DRAIN PAN FOR UNITS ORDERED WITH DOUBLE WALL CONSTRUCTION OPTIONAL ADD AN ADDITIONAL 10 OF THE BASE UNIT WEIGHT RT NATURAL VENT PV POWER VENT REFER TO MODEL DESCRIPTION ROOF TOP ARRANGEMENT RA A ROOF TOP ARRANGEMENT RA B WT SHIP WT WT SHIP WT WT SHIP WT WT SHIP WT RT 10 256 367 PV 10 262 373 RT 10 576 742 PV 10 583 749 RT 15 307 418 PV 15 298 409 RT 15 627 798 PV 15 619 785 RT 20 365 484 PV 20 356 475 RT 20 740 916 PV 20 731 907 R
58. motor base loose 1 Belts oily or dirty Improper drive selection Bearing Defective bearing Loose on bearing support k a b Needs lubrication Loose on shaft Seals misaligned Foreign material in bearing Worn bearing g h Fretting corrosion between inner race and shaft Shaft Seal Squeal a Needs lubrication b Misaligned 21 PROBLEM PROBABLE CAUSE SOLUTION 1 Noise Blower Wheel a Loose on shaft b Defective blower wheel Do not run blower Contact manufacturer c Unbalanced d Worn as a result of contact with abrasive or corrosive material Housing a Foreign material in housing b Cutoff of other part loose rattling during operation Electrical Lead in cable not secure AC hum in motor or relay Starting relay chatter Noisy motor bearings Single phasing a 3 phase motor Shaft Bent p o o o Undersized May cause noise at blower wheel bearings or pulley o If more than two bearings a shaft they must be properly aligned High Air Velocity Duct work too small for application Blower selection too small for application Registers or grilles too small for application Cooling coil with insufficient face area for application Obstruction in High Velocity Air Stream may cause Rattle or Pure Tone Whistle Dampers Registers Grilles Sharp elbows
59. mpany to make certain that the existing line is of adequate size to handle the combined load Check all connections for leaks with soap solution A WARNING Never use an open flame to detect gas leaks Explosive conditions may exist which would result in personal injury or death 11 MODULATING GAS CONTROL OPTIONAL Also refer to Outdoor Duct Furnace Installation Manual supplied with your unit Electronic On units equipped with electronic modulating control follow control manufacturer s installation instructions for sensing of outlet air temperature ELECTRICAL CONNECTIONS A WARNING HAZARDOUS VOLTAGE DISCONNECT ALL ELECTRIC POWER INCLUDING REMOTE DISCONNECTS BEFORE SERVICING Failure to disconnect power before servicing can cause severe personal injury or death All electrical connections must conform to the latest edition of ANSI NFPA No 70 National Electrical Code and applicable local codes In Canada to the Canadian Electrical Code Part CSA Standard C22 1 The rooftop packaged unit is wired at the factory and ready to be connected Actual unit wiring will differ according to the options chosen Each unit is shipped with its own wiring diagram refer to this wiring diagram for all electrical connections to the unit All electrical connections line voltage and thermostat are made in the Electrical Cabinet See Figure 9 Line voltage connections are made at the High Voltage
60. ner 3 Corner 4 RT10 32 75 134 731 15 7 217 260 240 200 692 15 7 241 257 238 223 10 32 75 134 730 15 7 217 259 239 200 69 1 157 241 257 238 223 RT15 32 75 134 745 15 8 217 272 254 203 706 15 9 241 269 252 226 PV15 32 75 134 743 15 8 217 269 252 203 704 158 241 267 250 226 RT20 43 75 134 750 21 0 249 317 292 230 710 210 278 313 290 258 PV20 43 75 134 744 210 249 311 287 229 704 210 278 308 284 257 RT25 43 75 134 760 210 256 335 310 237 724 214 285 332 308 265 PV25 43 75 134 755 210 255 329 305 236 716 214 284 326 303 264 RT30 54 75 134 746 26 1 331 417 380 302 711 26 2 365 412 377 334 PV30 54 75 134 73 9 264 330 407 370 301 70 4 264 364 402 368 333 RT35 54 75 134 77 0 25 8 306 413 369 273 732 25 9 340 409 367 304 PV35 54 75 134 763 258 305 403 359 272 72 4 259 339 399 357 303 RT40 60 25 134 77 2 286 320 436 393 289 734 286 356 431 391 323 PV40 60 25 134 76 6 28 6 319 426 383 288 72 7 _ 28 6 355 421 381 322 RT50 43 75 160 911 21 0 338 447 414 313 877 214 366 444 412 340 PV50 43 75 160 904 210 336 436 403 311 869 21 1 364 433 402 338 RT60 54 75 160 913 25 9 392 521 469 352 879 26 0 425 517 467 383 PV60 54 75 160 90 3 25 9 388 503 451 348 86 7 25 9 422 499 449 380 RT70 54 75 160 922 25 7 405 551 488 359 88 8 25 8 438 547 487 390 70 54 75 160 912 257 402 532 470 355 878 257 435 528 469 386 RT80 60 25 160 92 8 28 5 424 586 526 381 89 4 28 6 459 582 524 414 PV80 60 25 160 919 28 5 421 567 508 377 88 4 285 456 563 506 410 ARRANGEMENTS 1
61. nner as to prevent leaks Ducts exposed to the outdoors must be insulated and sealed to prevent water from entering either the unit or building through the duct If a single double or triple duct furnace only unit is connected to a return air duct or any other inlet air restriction the appliance shall be installed on the positive pressure side of the air circulating blower A CAUTION Remove wooden shipping support from beneath blower housing of Blower Section to prevent possible unit damage or improper unit operation if applicable INSTALLATION CLEARANCES Minimum clearances to combustible material are shown on the unit data plate It is important that clearances be maintained for servicing the unit refer to Submittal Insert for service clearances and that minimum clearances are provided from the unit including vent cap if Natural Vent model to combustible material Clearances around the outside air hood if unit is so equipped must be unobstructed See Figure 2 MOUNTING ON FIELD FURNISHED SUPPORTS Single double triple duct furnace only models have base rails which are suitable for mounting either directly on solid planking or steel channels Never install the unit on a soft roof where the rails could sink reducing clearance between the bottom panel and the roof or cause damage to the roofing surface All other models must use the following method or an equivalent when unit supports are field furnished Each
62. oltage c Blown fuse Unit a Broken belt s b Loose pulleys c Power to unit is disconnected d Motor overload protector has broken circuit e Optional thermostats firestats freezestats may lockout blower operation if set incorrect TROUBLESHOOTING GUIDE ELECTRIC MOTORS PROBLEM PROBABLE CAUSE SOLUTION 1 Motor Blown fuse or open circuit breaker Replace fuse or reset circuit breaker Overload trip Check and reset if manual Improper line connections Check connections to unit wiring diagram Improper current supply Check to determine that power supply agrees with motor nameplate specifications Mechanical failure Determine that motor and drive turn freely Check bearings Motor overloaded Reduce load or replace motor With a 3 phase power source one Check line for open phase phase may be open Defective capacitor Replace capacitor 2 Motor Stalls Wrong application Consult manufacturer Overloaded motor Reduce load or replace motor Low line voltage Check across AC line and correct if possible 23 PROBLEM PROBABLE CAUSE SOLUTION 3 Motor runs and then Partial loss of line voltage Check for loose connections dies down Determine adequacy of main power supply 4 Motor does not Motor undersized for application Replace with larger motor come up to speed Voltage too low at motor terminals Check across AC line and correct if possible Line wiring to moto
63. on if applicable Static Pressure through the unit should never exceed 2 0 inch W C 0 50 kPa The standard unit is operated at a temperature rise range of 20 to 60 F 11 to 33 C The high temperature rise model is operated at a temperature rise range of 60 to 90 F 33 to 50 C NOTICE It is important that the final temperature leaving the unit does not exceed 160 F 71 When final air throughput adjustments are being made a check of the discharge air temperature should be made after unit has operated for 15 to 20 minutes A CAUTION A unit should never be allowed to cycle on the primary limit for a prolonged period of time It is a safety control to prevent a fire If cycling on the primary limit is noted corrective measures should be taken immediately Failure to do so could result in unit damage or a fire NOTICE At initial unit installation unit should be started momentarily to confirm proper blower wheel rotation as the unit will deliver some air with the blower wheel running backwards Two basic air control systems can be used to deliver conditioned air to the occupied space intermittent or constant fan operation Intermittent Fan Operation The unit employs an air control system which utilizes a fan time delay relay to operate the fan while heating and the thermostat while cooling Refer to unit wiring diagram Constant Fan Operation The unit can be wired to give an air control sy
64. r Rooftop Gas Fired Duct Furnace Installation and Service Manual for specific information regarding the heating operation of this unit All units are equipped with a intermittent pilot ignition system The pilot is lit and extinguished each cycle of unit heating operation On natural gas units the ignitor will continue to spark and pilot gas will continue to flow until the pilot flame is proven LP propane units are equipped with 100 lockout The lockout function shuts off the main and pilot gas valves if the pilot gas fails to ignite within 90 seconds of the onset of trial for ignition The gas control system operates at 24 VAC and is supplied by a stepdown transformer found in the electrical cabinet that will match the unit line voltage specified See Figure 5 for unit controls location Do not use a thermostatic fan control switch when either two stage firing or modulated gas controls are used GAS CONTROL SYSTEM The standard unit comes equipped for single stage operation Unit heating operation is accomplished at full input Each duct furnace is equipped with an individual ignition control system which consists of the following components ignition control module gas valve and pilot burner The ignition control module is the heart of the ignition control system This control initiates all gas flow provides means to light the pilot burner proves and monitors the pilot burner operation The gas valve consists of two oper
65. r flow across coil Air binding Purge and charge system Thermal expansion valve a Bulb mounted at incorrect location b Bulb not secured properly Insufficient air flow a See air blower troubleshooting b Clogged coil Air bypassing coil Caulk safe off Undersized system demand Replace system exceeding cooling system capacity Too much outside air Check outside air dampers Refrigerant leak Determine leak location and correct Low liquid pressure Determine cause and correct 2 Water in Conditioned Air Exceeding coil face velocity 600 fom Reduce unit air flow Drain pan p trap clogged Clean pan and p trap Refer to condensing unit installation and service manual to thermal expansion valve installation instruction 25 TROUBLESHOOTING GUIDE CHILLED WATER COOLING COIL PROBLEM PROBABLE CAUSE SOLUTION 1 No or Insufficient Cooling Circulating pump failure Repair or replace pump Chilled water temperature not cool enough Check chiller Air binding air in coil Bleed coil Insufficient chilled water flow a Circulating pump capacity is inadequate b System piping losses too great Insufficient air flow a See air blower troubleshooting b Clogged coil Air bypassing coil Caulk safe off Undersized system demand Replace system exceeding cooling system capacity Too much outside a
66. r is too small Install larger line wiring 5 Motor takes too long Excessive load Replace with larger motor to accelerate Loose connection Check connections and tighten where necessary 6 Wrong Rotation 3 Phase Improperly wired to AC line wrong Check unit wiring diagram Reverse any two line sequence of phases voltage connections 7 Motor Overheats Motor overloaded Replace with larger motor Motor ventilation clogged Clean motor Motor 3 phase may have open phase Check to insure that all connections are tight Line voltage too high or too low Check across AC line and correct if possible Worn blower bearings Replace blower bearings 8 Motor Vibrates Motor mounting bolts loose Tighten mounting bolts Driven equipment unbalanced Balance driven equipment Worn motor bearings Replace motor 3 phase Motor running on single phase Check for open circuit and correct Bent motor shaft Replace motor 9 Rapid Motor Bearing Excessive overhung load due to over Reduce belt tension Wear tensioned belt TROUBLESHOOTING GUIDE FAN ASSEMBLY PROBLEM PROBABLE CAUSE SOLUTION 1 Short Belt Life Spin burns from belt slippage Tension belt High ambient temperature Use Gripnotch belts Grease or oil on belts Clean belts and pulleys Worn pulleys Replace pulleys Belt Misalignment Realign drive 2 Belts turn over in grooves Damaged belt Replace belt Excessive vibration Tens
67. removal section in beginning of this manual The pilot burner can be serviced by removing the pilot plate from the main burner drawer assembly To remove the main burner drawer assembly also refer to Outdoor Rooftop Duct Furnace Installation and Service Manual for servicing the burners proceed as follows 1 Shut off the gas supply at the gas shutoff valve and electrical power to the unit 2 Break the union upstream of duct furnace gas valve and loosen the union external to the furnace swing downward the piping to clear drawer 3 Disconnect duct furnace gas valve wiring taking note of all wire locations Disconnect ignitor and flame sensing probe wires at ignition control module and any other wires 18 4 Remove the locking screws holding the burnerdrawer assembly in position 5 Slide the burner drawer out of the duct furnace 6 Removal of burners is accomplished by sliding burner towards manifold compressing locating spring until the rear of the burner clears slot in back of burner drawer 7 With burner drawer removed from duct furnace inspect the inside surfaces of the heat exchanger Wire brush if necessary 8 Remove any dirt dust or other foreign matter from the burners using a wire brush and or compressed air Insure all parts of the burner are unobstructed Inspect and clean pilot burner if necessary 9 Reassemble the duct furnace by replacing all parts in order 10 Light unit per the unit lighting instruc
68. s injury or property damage 1 Inspect all wiring connections connections should be clean and tight Trace circuits to insure that actual wiring agrees with the as wired diagrams provided with the unit Information in the wiring diagram title block should match the data appearing on the unit nameplate 2 Lubricate all electrical motors according to the manufacturer s recommendations 3 Verify that the system switch is in the OFF position 4 Check unit supply voltage to ensure that it is within the utilization range 5 Inspect the interior of the unit remove any debris or tools which may be present 17 Starting Unit in Heating Mode 1 Close the unit disconnect switch which provides power to the unit A WARNING High voltage is present in some areas of the unit primarily the main electrical cabinet with the unit disconnect switch closed Failure to exercise caution when working in the presence of energized electrical components may result in injury or death from electrical shock 2 Set the thermostat switching subbase as indicated below a position the heating system switch at either HEAT or AUTO b set the fan switch to AUTO 3 Place the system switch in the ON position With the thermostat calling for heat unit operation is automatic Starting Unit in Cooling Mode 1 Close the unit disconnect switch which provides power to the unit A WARNING High voltage is present in some
69. should use 4 17 ft min x 5 min or 20 8 ft 1 97 L s x 5 min x 60 s min 591L of gas Minor input adjustments can be made by removing pressure regulator cap and turning regulator clockwise to increase input or counter clockwise to decrease input Any appreciable adjustment in input rate should be made by reorificing 16 Method to Check Manifold Pressure 1 Close the manual valve of unit gas valve 2 Install 1 8 inch pipe connection in the tapped hole provided in the gas valve body near outlet of the valve 3 Attach manometer to 1 8 inch pipe connection by means of a rubber hose 4 Fire unit according to instructions and observe the pressure and confirm it matches the unit manifold pressure from the unit rating plate 5 Small variations in the manifold pressure can be made by means of the gas valve pressure regulator Remove pressure regulator cap and turn regulator clockwise to increase pressure or counter clockwise to decrease pressure PILOT ADJUSTMENT 1 Disconnect wire from terminal marked MV at gas valve 2 Provide call for heat 3 Pilot adjustment is found on the gas valve Remove pilot adjustment cap 4 Adjust the pilot screw to provide properly sized flame 5 Aproper pilot burner flame is a soft steady flame that envelopes 38 to 1 2 inch 9 5 to 12 7mm of the flame sense probe tip 6 Replace the pilot adjustment cap 7 Reconnect wire to terminal MV PRIMARY AIR SHUTTER ADJUSTMENT After the unit h
70. st be cleaned and maintained per manufacturer s instruction frequently during the operating season 7 Inspect Control Dampers during periodic maintenance Damper pivot points should be cleaned to ensure free damper operation 8 Blower wheels should be checked periodically for dirt build up on blades Clean as required FILTERS It is recommended that air filters be changed or cleaned at least four times a year More frequent attention to filters is required if the air being handled by the unit is unusually dirty Air flow reduction caused by the dirty air filters will increase the discharge air temperature and may cause unit cycling on the primary limit Filters by others should be serviced regularly and changed or washed when necessary to maintain the required air throughput In a dusty environment filters may clog up in less than one month High CFM Blower Air Filter Size Requirements Number of Filters Required Unit Input 16 x 20 in 20 x 20 in 200 MBtuh 58 6 kW 8 250 MBtuh 73 2 kW 8 300 MBtuh 87 9 kW 8 4 350 MBtuh 102 6 kW 8 4 400 MBtuh 117 2 kW 12 500 MBtuh 146 5 kW 8 600 MBtuh 175 8 kW 8 4 700 MBtuh 205 1 kW 8 4 800 MBtuh 234 4 kW 12 1 200 MBtuh 351 6kW 12 Standard CFM Blower Air Filter Size Requirements Number of Filters Required Unit Input 16 x 20 in 20 x 20 in 100MBtuh 20 3kW 4 o o o o O 150 MBtuh 44 0 kW 4 200 MBtuh 58 6 kW 4 250 MBtu
71. stem which constantly circulates air through the unit and occupied space with constant fan operation Refer to unit wiring diagram NOTICE Check blower belt tension Proper belt tension is important to the long life of the belt and motor Proper belt tension will allow the belt to be depressed 1 2 inch to 34 inch It is important that the blower motor and the blower wheel pulleys be in good alignment with the motor and blower shafts parallel Belt tension must be adjusted to give approximately 3 4 inch deflection of the belt when finger pressure is applied to the middle of the belt See Figure 13 Small changes in this tension may be necessary for optimum operation Belts will stretch over a period of time requiring an adjustment to this tension See MAINTENANCE section for belt and pulley adjustments 15 Figure 13 Belt Tension Guide 1 2 TO 3 4 These units are set at the factory for the RPM required to meet the air volume CFM and external static pressure ordered If the estimated external static is incorrect or changes were made to the duct system the blower RPM may need to be changed Both the Standard and High CFM Blowers use motors which are equipped with adjustable pitch pulleys After removing belt s loosen the pulley set screw and remove the key turn adjustable half of a pulley clockwise to increase RPM or counter clockwise to decrease RPM Insert key tighten set screw and replace belt s
72. t Furnace 18 457 mm 42 a o o o 5 30 Refer to Outdoor Duct Furnace Manual and Factory Installed Options Manual for specific clearances lil INSTALLATION AWARNING Open all disconnect switches and secure in that position before installing unit Failure to do so may result in personal injury or death from electrical shock Installation must conform with local building codes or in the absence of local codes with the latest edition of the National Fuel Gas Code ANSI 2223 1 N F P A No 54 National Fuel Gas Code A heat loss study and a complete layout of the system should be made first When locating the unit in its permanent location make certain that the roof is capable of carrying the additional load of the equipment Check the unit net weights section of this manual Make certain that clearances are provided for service minimum clearance to combustible material and to venting cap See Figure 2 for this information Ducts connected to units which do not have either a blower section or a supply plenum must have a removable access panel in the duct which is connected to a duct furnace The duct openings shall be accessible when the unit is installed in service and shall be of such size that smoke or reflected light may be observed inside the casing to indicate the presence of leaks in the heating element The covers for the panels shall be attached in such ma
73. te combustion which can cause death or serious illness The state of California has determined that these substances may cause cancer birth defects or other reproductive harm Install and Service this product to avoid exposure to airborne particles of glasswool fibers and or ceramic fibers known to the State of California to cause cancer through inhalation INSTALLER S RESPONSIBILITY Installer Please Note This equipment has been test fired and inspected It has been shipped free from defects from our factory However during shipment and installation problems such as loose wires leaks or loose fasteners may occur It is the installer s responsibility to inspect and correct any problems that may be found RECEIVING INSTRUCTIONS Inspect shipment immediately when received to determine if any damage has occurred to the unit during shipment After the unit has been cM C US LISTED Intertek IMPORTANT Look in direction of unit air flow to determine whether unit is right hand or left hand accessible uncrated check for any visible SZ MESTEK INC damage to the unit If any damage is found the consignee should sign A ooo NORTH ELM ST WESTFIELD MA 01085 the bill of lading indicating such TEL 413 568 9571 FAX 413 562 8437 damage and immediately file claim for damage with the transportation company www mestek com ee MADE IN THE USA TABLE OF CONTENTS RECEIVING Pre Install
74. tions 11 Check the burner adjustment See the Primary Air Adjustment section of this manual 12 Check all gas control valves and pipe connections for leaks AWARNING Under no circumstance should combustible material be located within the speci fied clearances Failure to provide proper clear ance could result in personal injury or property damage from fire 13 Check the operation of the duct furnace gas valve by lowering the setting of the thermostat stopping the operation of the duct furnace The duct furnace gas valve should close extinguishing the pilot and main burner flames 14 Inspect and service the blower section of the system The unit should be thoroughly checked before the start and at the end of each heating and cooling season 1 Motors and belts should be inspected 2 Tighten belts if loose 3 Check and clean DX or Chilled Water coil twice yearly if unit is So equipped per manufacturer s service manual Chilled Water coil must be winterized at beginning of heating season i e drain water from coil per manufacturer s instructions 4 Check air throughput at beginning of heating season to confirm unit operation is within the specified temperature rise range 5 At beginning of heating season clear Condensate Drain Pan and P trap of water if unit is equipped with DX or Chilled water coil Clean out drain pan and fill P trap with a non toxic glycol solution 6 Evaporative cooler mu
75. ture Control w Duct Sensor U S 350 2 Stage Modular Electronic Control System W S 350 3 Stage Modular Electronic Control System X S 350 4 Stage Modular Electronic Control System Y S 350 6 Stage Modular Electronic Control System E Chilled Water Coil 4 Row G Chilled Water Coil 6 Row 0 None Z Other Special 0 None Z Other 11 Supply Voltage SV 1 115 1 60 5 230 3 60 2 208 1 60 6 460 3 60 3 230 1 60 7 575 3 60 4 208 3 60 0 None Z Other 33 H1 Return Firestat H2 Supply Firestat H3 Freezestat w Time Delay H4 Ambient Lockout Single Furnace H6 Ambient Lockout Dual Furnace H7 Ambient Lockout Triple Furnace A1 Voisture Eliminators A2 Horizontal Return Low Leak Damper 5 Furnace Drip Pan 409 Stainless 6 High Altitude Unit 7 High Pressure Regulator A8 Unit De rate J1 Interlock Relay 24V Coil DPDT 104A Plug in J2 Interlock Relay 24 115V Coil SPDT 10A J3 Interlock Relay 24 115 230V Coil DPDT 10A Interlock Relay 24V Coil 4PDT 10A B1 Filters 1 WA Standard 2 Filters 2 WA Filters 2 TA B4 Filters 1 30 B5 Filters 2 30 K1 Manual Reset High Limit Switch K2 High Low Gas Pressure Limit Switches Status Lamp Elec Cabinet K4 Fan Time Delay Arrangement A Only K5 Air Flow Prove Switch Dwyer 1910 0 f C1 Evap Cooler Fill amp Drain Kit C2 Evap Cool
76. venting is an integral part of the unit and must not be altered in the field The Natural Vented units are equipped with a vent cap which is designed for natural draft venting Air for combustion enters the base of the vent cap through a protective grill and products of combustion are discharged at the upper section of the vent cap T This vent cap is shipped in a separate carton and should be installed per the Venting section of the Outdoor Rooftop Gas Fired Duct Furnace Installation and Service Manual The Power Vented unit has a induced draft venting system The combustion air inlet and products of combustion discharge louvers are located in the upper section of the Duct Furnace side access panel Never locate these units in an area where the flue products discharge outlet may be directed at any fresh air vents See the Outdoor Rooftop Gas Fired Duct Furnace Installation and Service Manual for installation and servicing requirements DUCT CONNECTIONS All ductwork must be properly supported so that no strain is put on the unit Do not alter or bend the discharge duct flanges supplied on your furnace air handler Ducts connected to units which do not have either a blower section or a supply plenum must have a removable access panel in the duct which is connected to a duct furnace The duct openings shall be accessible when the unit is installed in service and shall be of such size that smoke or reflected light may be observed inside th
77. y Controller Economizer 28 Ambient Lockout Figure 10 Electrical Cabinet Low Voltoge Section High Voltage Section 7 2000000000 2000000000 20121 LINE VOLTAGE Optional Controls Mounting Location Back Panel 2 High Voltage Barrier Assy 24V Transformer High Voltage Terminal Block 4 Ground Lug Din Mounting Rail Contactor or Starter D3863 12 Outdoor line voltage conduits leading into the unit should be installed to prevent rain from wetting any high voltage wire Locate the thermostat in accordance with the instructions supplied with the thermostat All field wiring must have a minimum temperature rating of 185 F 85 C Control wiring must be a minimum of 18 gauge wire size Control wiring must be sized for the length of run Locate line voltage disconnect box per local codes If mounting the disconnect box to the unit never mount it to an unit access panel Possible locations include the front of the blower or filter section the outdoor air hood or the rear of the supply plenum See Figure 11 Electrical conduit must be routed so as not to interfere with removal of any access panel NOTICE Should any original wire supplied with the unit have to be replaced it must be replaced with wiring having a temperature rating of at least 221 105 C Figure 11 Disconnect
78. y or death The gas line should be supported so that no strain is placed on the unit Pipe compounds which are not soluble to liquid petroleum gases must be used on threaded joints The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1 2 psi 3 5 kPa The appliance must be isolated from the gas supply piping system by closing the individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1 2 psi 3 5 kPa For additional gas piping information including pipe sizing and drip leg installation refer to Outdoor Rooftop Gas Fired Duct Furnace Installation and Service Manual For additional piping information refer to the National Fuel Gas Code 2233 1 latest edition NOTICE If the gas duct furnace is to be fired with LP gas consult local LP gas dealer for piping size information NOTICE UNIT INSTALLATION FOR USE WITH PROPANE BOTTLED GAS MUST BE MADE BY A QUALIFIED LP GAS DEALER OR INSTALLER HE WILL INSURE PROPER JOINT COMPOUNDS ARE USED FOR MAKING PIPE CONNECTIONS THAT AIR IS PURGED FROM LINES THAT A THOROUGH TEST IS MADE FOR LEAKS BEFORE OPERATING THE UNIT AND THAT IT IS PROPERLY CONNECTED TO PROPANE GAS SUPPLY SYSTEM Before any connection is made to an existing line supplying other gas appliances contact the local gas co

PACKAGED ROOFTOP ARRANGEMENTS

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