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McQuay IM 487-4

41

Introduction

Mixing Box (RAH 47–77 only)

This section uses an outside air damper and a return air
damper. Using these dampers allows outside air to blend with
return air. Synchronized operation of the dampers is
accomplished by interconnecting rods. As one damper section
opens, the other section is closed. A total of 100% cfm is
always drawn from this section. Damper positioning can be
manually or automatically adjusted. With a field-installed
controller, automatic operation can be obtained.

These dampers provide a similar function to economizer
dampers. This option differs from an economizer in that no
unit mounted exhaust dampers are provided.

Note:

For good airflow control, adjust linkages so damper

blades do not open beyond 70 degrees. Opening a
damper blade beyond 70 degrees has little effect on its

airflow. Do not “over close” low leak damper blades.

The edge seal should just lightly contact the adjoining
blade. The blades lock up if they are closed so far that

the seal goes over center.

Figure 48. Mixing box

OA

CLOSED

OA

OPEN

90

STROKE

.25" (6 mm)

.75"

(19 mm)

3.00"

(76 mm)

OA

CLOSED

OA

OPEN

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Содержание RoofPak RAH 047C

Страница 1: ...service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE IN...

Страница 2: ...er RAH 047C 077C 12000 to 50000 cfm RDS 800C 802C 4000 to 20000 cfm Installation and Maintenance Manual IM 487 4 Group Applied Systems Part Number IM 487 Date December 2004 US Artisan Technology Group...

Страница 3: ...of Operation 54 Power up 54 Fan Operation 55 Economizer Operation 55 Heating 56 Wiring Diagrams 57 Legend 57 Unit Options 84 Enthalpy Control 84 External Time Clock 84 Smoke and Fire Protection 85 Smo...

Страница 4: ...l see Table 1 Gas Burner Nameplate On units that include gas heat the nameplate is located on the lower right corner on the main control box door It includes the burner model number minimum maximum in...

Страница 5: ...re 2 Blow through configuration unit size 077C shown Bottom return air opening Optional outside and return air dampers Condensate drain connections Bottom discharge opening Control entrances Power ent...

Страница 6: ...ge opening Control entrances Power entrances Plan View Elevation Optional exhaust dampers Optional return air fan Supply air fan Steam hot water Filter section Optional outside louvers both sides Opti...

Страница 7: ...discharge opening Control entrances Power entrances Plan View Elevation Heating cooling coil Discharge plenum Supply air fan Filter section Heat section natural gas steam hot water electric Fresh air...

Страница 8: ...ECONO 30 OA PLENUM OA HOOD RETURN AIR FILTER TA 30 65 95 STAGG BLANK BLANK STAGG BLANK BLANK STAGG STAGG STAGG DP ONLY FLAT S HW BLANK OPT BLANK FLAT FLAT STAGG STAGG STAGG STAGG BLANK BLANK S HW ELE...

Страница 9: ...O 30 OA PLENUM OA HOOD RETURN AIR FILTER TA 30 65 95 STAGG BLANK BLANK STAGG BLANK BLANK STAGG STAGG STAGG DP ONLY FLAT S HW MWU HEAT OPT EVAP COIL COIL SA FAN OPT BLANK OUTSIDE AIRSTREAM ECON W PROP...

Страница 10: ...ram legend which is included in Wiring Diagrams on page 57 Figure shows the blow through heat and the blow through coil sections Figure 7 Control locations cftc f C CX F Economizer Filter DX Heat sect...

Страница 11: ...he following figures These figures show a typical unit configuration Specific unit configurations may differ slightly from these figures depending on the particular unit options Figure 8 Control panel...

Страница 12: ...VFD remote display REC1 TB1 DHL SPS1 SPS2 MMP60 MMP10 MMP20 R46 R48 HS1 S1 S7 S4 Keypad display Serial conn M60 M10 F3 M20 supply Power F1A F1B F1C T1 DS1 GND LUG DS1 TB7 blocks remaining TB2 blocks...

Страница 13: ...10 McQuay IM 487 4 Introduction Figure 10 Typical main control panel 047C 460 volt Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Страница 14: ...McQuay IM 487 4 11 Introduction Figure 11 Typical main control panel 077C 460 volt Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Страница 15: ...e fans 460 volt Figure 14 VFD bypass panel 40 HP 460 volt Figure 15 Electric heat panel sizes 800 802C S3 FSG FSG Time LS1 LS2 AS IT TD10 R22 R20 R23 R21 M41 M42 M41 M33 M32 M31 FB33 FB32 FB31 FB43 FB...

Страница 16: ...lectric heat panel 077C GLG3 DS3 M41 M43 FB41 FB42 FB43 H53 TB11 M31 M32 M33 FB31 FB32 FB33 M42 GLG3 DS3 M41 M42 M43 FB41 FB42 FB43 H53 TB11 M34 M44 M31 M32 M33 FB31 FB32 FB33 FB34 FB44 Artisan Techno...

Страница 17: ...connector detail LT OP1 LT OP2 LT11 LT10 DFRH DFLH OPEN4 SD1 SD2 GSHT1 GSHT2 HL22 OPEN3 OAE PC7 PC5 ACT3 OPEN2 SV12 SV56 AFD10 AFD20 FP1 OPEN1 EPTS RATS OATS DATS Artisan Technology Group Quality Inst...

Страница 18: ...when used with RAE A D N A 049262201 OAT Outside air temperature sensor Senses outside air temperature N A N A N A 060004705 PC5 Dirty filter switch Senses filter pressure drop Auto First filter secti...

Страница 19: ...lable Unit Clearances Service Clearance Allow service clearance approximately as indicated in Figure 19 Also McQuay recommends providing a roof walkway to the rooftop unit as well as along at least th...

Страница 20: ...should be at least 96 2438 mm on all sides of the unit 3 The distance between any two units within the walls should be at least 120 3048 mm Do not locate outside air intakes near exhaust vents or othe...

Страница 21: ...obstructions in the areas above the outside air and exhaust dampers that are farther than 24 610 mm from the side of the unit Figure 21 Overhead clearance Figure 22 Side discharge 24 610 mm Maximum 2...

Страница 22: ...on page 20 1 Set curbing parts A through H per dimensions shown over roof opening or on a level surface Note location of return and supply air openings 2 If applicable set other curbing parts D L M et...

Страница 23: ...ngths on opposite sides of assembly and install a cross support D at each side D M L M Detail A RAH unit Dimensions X Y in mm in mm 047C 38 965 28 711 077C with flat cooling coil and or 44 SWSI plenum...

Страница 24: ...s Unit size Fan X Y XX YY Unit size Return fan X Y XX YY in mm in mm in mm in mm in mm in mm in mm in mm 800 802C None 24 0 610 82 0 2083 6 8 173 1 5 38 800 802C None 24 0 610 82 0 2083 6 8 173 1 5 38...

Страница 25: ...plate between the unit and the resilient material to distribute the load Seal cabinet penetrations electrical piping etc properly to protect against moisture and weather Figure 27 Post and rail mount...

Страница 26: ...e are isolation dampers make sure they are properly installed and fully closed to prevent the entry of animals and debris through the supply and return air openings 7 Cover the supply and return air o...

Страница 27: ...ble 5 for this dimension If A d 288 7315 mm 4 point lifting is sufficient If A 288 7315 mm 6 point lifting is required Figure 29 Unit type RAH lifting points z Table 4 RAH X dimension see Figure 29 Ty...

Страница 28: ...he sections 2 mechanically recoupling the cabinet and 3 reconnecting power and control wiring Phase I Set sections 1 Remove top cap and save for Step 3 2 Remove screws on fan panel leaving retainer cl...

Страница 29: ...ovided 5 Install screws 25 20 75 removed in Phase I Step 2 6 Install splice cover provided Figure 31 Reassemble cabinet Reinstall top cap saved in step 1 Caulk ends of splice cap See detail Splice cov...

Страница 30: ...following locations Through the floor of the unit Through the discharge and bulkhead of the unit Through a cabinet door near the DX coil that is not required for service areas In preparing for field...

Страница 31: ...s tight and there are no refrigerant leaks evacuate the system Use a vacuum pump with a pumping capacity of approximately 3 cu ft min and the ability to reduce the vacuum in the unit to at least 1 mm...

Страница 32: ...the service valve in the open position Important At this point interrupt the charging procedure and do prestart checks before attempting to complete the refrigerant charge Note Stamp the total operati...

Страница 33: ...ain line away from the unit a minimum of 1 8 per foot The drain line must penetrate the roof external to the unit Refer to local codes for additional requirements Sealed drain lines require venting to...

Страница 34: ...e heat section all piping can be done internal to the unit without requiring a piping vestibule Refer to Figure 35 and Figure 37 on page 33 When a steam or hot water coil is installed in the combinati...

Страница 35: ...r and water leakage Note Factory installed water valves and piping are bronze brass and copper Dissimilar metals within the plumbing system can cause galvanic corrosion To avoid corrosion provide prop...

Страница 36: ...rough coils Drain mains ahead of coils through a steam trap to the return line 5 Do not attempt to lift condensate when using modulating or on off control 6 Pitch all supply and return steam piping do...

Страница 37: ...Valve assembly Figure 39 Steam valve package Chilled Water Piping Chilled water coils are provided without valves for field piping or piped with three way valves with motor actuators Table 11 provide...

Страница 38: ...2 coils 1143 1143 mm 51 9 4 82 m 3 C R C Q A P A P 4 C R C Q C P B P B P 5 C R C Q B P A P 6 C R C Q C P B P A P 8 C R C Q C P B P B P Blow thru or draw thru large coil section 63 63 2 coils 1600 1600...

Страница 39: ...esignate units that are not furnished with the factory installed piping valve package Required are field sweat connections at one or two coils to male copper tubing for the supply and return water pip...

Страница 40: ...e vestibule is to be located by removing screws holding hinges to upright support leave hinges on door Set door aside and save for Step 4 Remove door latch assembly from other side upright support Use...

Страница 41: ...stibule in the same opening direction as it was on the unit 2 Remove and discard latch handle locking screws and retaining washer Fasten door latch assembly to side panel using screws and bushings sav...

Страница 42: ...mpers from full open to full close see Figure 45 Access to the actuator and linkage is from the filler section Mechanical stops are placed in the crankarm mounting bracket Do not remove stops Driving...

Страница 43: ...the linkage rod on units with manually adjustable linkages On units provided with MicroTech II controls the damper position may be set at the controller keypad During unit operation the two position a...

Страница 44: ...btained These dampers provide a similar function to economizer dampers This option differs from an economizer in that no unit mounted exhaust dampers are provided Note For good airflow control adjust...

Страница 45: ...through a jack shaft for connection to a single actuator factory or field installed Figure 49 Face and bypass dampers RDS 800 802 only Figure 50 Face and bypass dampers staggered arrangement RAH 47 77...

Страница 46: ...head runoff from overhangs or other such structures Recaulk field assembled options such as external piping or vestibules per the installation instructions provided with the option Extended Shaft Face...

Страница 47: ...r ASHRAE and SMACNA recommendations Where return air ducts are not required connect a sound absorbing T or L section to the unit return to reduce noise transmission to the occupied space Ductwork expo...

Страница 48: ...Keep it several duct diameters away from take off points bends neckdowns attenuators vanes or other irregularities 5 Use a static pressure tip Dwyer A302 or equivalent or the bare end of the plastic t...

Страница 49: ...r results in unsatisfactory operation 6 Use an outdoor static pressure tip Dwyer A306 or equivalent to minimize the adverse effects of wind Place some type of screen over the sensor to keep out insect...

Страница 50: ...ver current protected at the point of distribution The maximum allowable overcurrent protection MROPD appears on the unit nameplate All RDS and RAH Units All units are provided with internal power wir...

Страница 51: ...n actual opening shown on submittal documents R e m o v e L i f t i n g B r a c k e t I f L o c a t e d H e r e B e f o r e D r i l l i n g H o l e M a i n C o n t r o l P a n e l 2 7 5 7 0 m m 3 7 6...

Страница 52: ...e entry point 1 All wire sizes assume separate conduit for each set of parallel conductors 2 All wire sizes based on NEC Table 310 16 for 75 C THW wire copper Canadian electrical code wire ampacities...

Страница 53: ...for wire entry Figure 59 Field control wiring connections Interconnecting wiring enters the air handler unit through 7 8 knockouts in the bottom of the main control panel The interconnecting wiring is...

Страница 54: ...ng against a static pressure it should run level If not level the assembly as follows see Figure 63 1 Loosen the 1 5 16 jam nut above the fan base 2 Using a large straight blade screwdriver turn the 5...

Страница 55: ...re adjusted for level operation when the fan is running check the thrust restraints With the fan off set the adjustment nuts so the spring is slightly compressed against the angle bolted to the fan ho...

Страница 56: ...on thereby helping to prevent the fan from being tossed about and damaged or causing damage When a seismic restraint is properly adjusted and the fan is operating normally the neoprene center bumper i...

Страница 57: ...5VAC power is supplied to the following Smoke detectors lines 265 and 267 Economizer actuator ACT3 line 313 M30A to energize the supply fan VFD line 426 M40A to energize the return fan VFD line 430 He...

Страница 58: ...ilding pressure see the appropriate OM for more information When energized output MCB BO16 line 409 drives AFD20 toward increased capacity MCB BO15 line 411 drives them toward decreased capacity Note...

Страница 59: ...s operating its firing rate is determined by the position of gas valve actuator VM1 This actuator modulates the butterfly gas valve and combustion air damper thus varying the furnace firing rate betwe...

Страница 60: ...wheel motor 1 Energy recovery section ERM2 Energy recovery wheel motor 2 Energy recovery section F1A B Fuse control circuit transformer T1 primary Main control box F1C Fuse control circuit transformer...

Страница 61: ...heat gas electric Gas electric heat box R24 Relay heat alarm gas Main control box R25 Relay heat gas start supply fan inverter Main control box ID Description Standard location R26 Relay isol exh damp...

Страница 62: ...ompr 1 4 Main control box TD10 Time delay hi turn down burner Gas heat box TR1 2 Transducer pressure Main control box UV Ultra violet light s Coil discharge section VM1 Valve motor 1 heating Gas heat...

Страница 63: ...POWER 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 G T3B T2B T1B T3A T2A T1A L3 L2 L1 GLG1 DS1 Schematic...

Страница 64: ...T1 T3B T3A T2B T2A T1B T1A L3B L3A L2B L2A L1B L1A T3 T2 L3 L2 T1 L1 T3 T2 T1 T3 T2 L3 L2 T1 L1 T3B T3A T2B T2A T1B T1A L3B L3A L2B L2A L1B L1A 1 2 3 4 5 6 7 8 GRD 2 1 2 1 2 1 X3 X1 X2 H4 H3 H2 H1 T3...

Страница 65: ...230 231 232 233 234 235 236 237 238 239 240 241 242 243 219 426 221 256 115V 24V CLASS 2 ECON OADM 3 2 4 1 14 15 GRD 16 2 1 10 11 12 13 23 24 55 3 1 114 54 5 4 2 H 115 6 17 16 8 6 2 1 2 CW 4 R COM WH...

Страница 66: ...T A C CLASS 2 CIRCUIT DUCT HI LIMIT 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 426 219 14 13 104 108 7 6 105 106 M10 TB2 TB2 R63 TB2 TB...

Страница 67: ...426 MTR L3B L3A L2B L2A L1B L1A L3 3 L2 3 L1 3 GND W2 V2 U2 W1 V1 U1 G G T3B T2B T1B T3A T2A T1A L3 L2 L1 T3 T2 T1 L3 L3 L2 L2 L1 L1 T3 T2 T1 T3 T2 T1 L3 L2 L1 T3 T2 T1 L3 L2 L1 C2 B2 A2 C1 B1 A1 T3B...

Страница 68: ...7 8 GRD 2 1 2 1 2 1 X3 X1 X2 H4 H3 H2 H1 3 2 1 T3 T2 T1 C2 B2 A2 C1 B1 A1 L3 L3 L2 L2 L1 L1 T3 T2 T1 T3 T2 T1 L3 L2 L1 T3 T2 T1 L3 L2 L1 T3B T3A T2B T2A T1B T1A L3B L3A L2B L2A L1B L1A GND W2 V2 U2 W1...

Страница 69: ...136 137 138 139 140 141 426 109 426 MTR T3 T2 T1 T3B T3A T2B T2A T1B T1A L3B L3A L2B L2A L1B L1A T3 T2 L3 L2 T1 L1 G T3 T2 T1 L3 L2 L1 L3B L3A L2B L2A L1B L1A L3 3 L2 3 L1 3 SUPPLY FAN MMP10 M10 GLG1...

Страница 70: ...9 426 MTR 2 1 2 1 2 1 X3 X1 X2 H4 H3 H2 H1 1 2 3 4 5 6 7 8 GRD L3 1 L2 1 L1 1 T3 T2 T1 T3 T2 L3 L2 T1 L1 T3B T3A T2B T2A T1B T1A L3B L3A L2B L2A L1B L1A L3 6 L2 6 L1 6 F1C F1A F1B T1_N T1 T1_115VAC TB...

Страница 71: ...PACE RESET ZONE OR SPACE SENSOR AIR FLOW 5 4 3 2 4 1 7 6 R 5 4 R 3 2 R 1 7C 7 6C 6 5C 5 4C 4 3C 3 2C 2 1C 1 P1 REF N2 N2 J1 COM 24VAC 14 15 GRD 16 10 11 12 13 2 1 2 1 4 3 23 24 1 2 4 WHT BLK DRN 3 5 1...

Страница 72: ...3 WHT BLK DRN WHT BLK DRN 6 8 3 8 7 8 7 WHT BLK DRN S 103 G T Y 1 4 3 2 RED WHT BLK DRN 3 2 1 4 1 2 3 DRN RED WHT BLK 4 1 109 3 2 3 1 131 WHT BLK DRN PWR COM OUT 126 127 GRD 107 7 4 8 9 4 3 5 DRN WHT...

Страница 73: ...INPUT 3 2 1 104 102 105 106 101 101 1 2 4 A C 1 2 4 A C 120 121 132 3 4 WHT BLK DRN WHT BLK DRN BLK RED WHT DRN GRD WHT BLK DRN 3 4 17 16 6 5 17 16 6 6 3 5 113 3 113 112 3 Y 1 R 101 108 4 1 1 2 1 2 3...

Страница 74: ...SR TR1 TR 3 1 2 S 7 4 8 9 4 3 5 DRN WHT RED BLK 3 4 17 16 6 5 17 16 6 6 3 5 113 2 1 115 H 1 115 H 2 4 1 109 3 131 WHT BLK DRN PWR COM OUT 126 127 GRD 3 113 1 109 2 3 1 131 WHT BLK DRN PWR COM OUT 126...

Страница 75: ...320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 207 207 207 364 362 207 207 239 SRC FAN_OPERATION EXT_ALARM_SIGNAL BO4 BO3 24V SRC jprs 24V SRC jprs 115V 24V CLASS 2 24V SRC jprs OPEN BO6...

Страница 76: ...TIFIER DC 12V 115V RELIEF DAMPER OPP DR SIDE RELIEF DAMPER DRIVE SIDE HEAT OPEN B10 CLOSE B09 24V SRC jprs 24V SRC jprs AC AC L1 X1 L2 X2 1 3 BLK WHT WHT BLK 8 9 11 33 36 35 34 5 7 6 5 5 5 5 5 5 5 6 6...

Страница 77: ...SAF INCR BO14 RAF INCR BO16 HEAT ENABLE BO11 24V SRC jprs 24V SRC jprs SAF DECR BO13 RAF DECR BO15 24V SRC jprs 2ND 2NC 1NO 1NC 2C 1C 12 32 11 31 12 32 11 31 3 12 9 10 7 4 6 2 11 8 7 1 1 3 1 3 A2 A1...

Страница 78: ...DECR INCR SAF ABB401 DECR INCR RAF ABB401 7 6 4 1 3 5 14 13 7 14 H2DN H2V H2UP 14 9 12 16 10 8 11 13 7 6 5 2 3 5 12 14 13 15 H2DN H2V H2UP 14 9 12 16 10 8 11 13 R67 PL7 PP PL7 PP R61 M30I BB PL7 PP P...

Страница 79: ...G F FLAME ROD FD MICROCOMPUTER 5K1 2K1 1K1 L1 6K1 3K1 4K1 2K2 FLAME AMPLI FIER T I M E R FSG FLAME SAFEGUARD PLUG IN TYPE CONTROLLER BLK BLK 10NO 10 8 9 9 11 12 9NO 9 2 1 R BLK WHT 6 5 4 6 5 4 5 6 4 R...

Страница 80: ...SED THE ACTUATOR WILL REMAIN WILL RE POSITION TOWARD A HIGHER FIRING RATE UNTIL BO 10 OPENS OR THE ACTUATOR REACHES ITS MAXIMUM POSITION WHEN THE MAIN CONTROL SYSTEM CLOSES BO 9 THE BURNER AIR AND GAS...

Страница 81: ...PLUG IN TYPE CONTROLLER 6000V X1 X2 115V BLK BLK 9 9 8 10NO 10 9NO 9 5 6 4 11 12 RED_G630 B WHT_G630 W YEL_G632 R YEL_G633 1 YEL_G634 2 2 1 R WHT BLK C2 C1 COM NO 21 21 21 21 21 21 21 BLK BLK BLK WHT...

Страница 82: ...11 ON THE MAIN CTRL BRD MCB THUS ENERGIZING RELAY R20 WHEN THE ROOFTOP UNIT IS ENERGIZED 120 VOLT POWER IS SUPPLIED TO THE SYSTEM ON OFF SWITCH S1 TO BURNER ON OFF SWITCH S3 AND 24 VOLTS TO THE BO 11...

Страница 83: ...3 T2 T1 L3 L2 L1 L3 L2 L1 T3 T2 T1 L3 8 L2 8 L1 8 L3 3 L2 3 L1 3 T3 T2 T1 L3 L2 L1 L3 L2 L1 T3 T2 T1 L3 4 L2 4 L1 4 T3 T2 T1 L3 L2 L1 L3 L2 L1 T3 T2 T1 4 3 2 1 4 3 2 1 L3 L2 L1 PB3 PB3 M31 FB31 HTR1A...

Страница 84: ...3 2 1 REF N2 N2 24C BI12 24V 11NO 11 A1 A2 4 5 94 6 9 16 9 16 9 16 9 16 2 1 A1 A2 2 1 A1 A2 2 1 96 97 99 7 8 9 A1 A2 A1 A2 A1 A2 A1 A2 A1 A2 2 1 2 1 2 1 2 1 2 1 95 98 93 3 17 1 4 3 2 1 PL12 PP T1_N 1...

Страница 85: ...407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 149 137 137 260 149 219 A1 A2 A1 A2 76 75 76 75 208 209 207 8 11 M10 M20 MMP20 MMP10 T1_N 1...

Страница 86: ...C 9 16 MCB 207 11 31 MMP10 12 32 11 31 MMP20 12 32 TO MOTHERBOARD WIRED INTERNAL SOURCE 9 16 T3_COM 3 11 T3_24V 3 11 115VAC_GF 1 T1_N 1 68 1003B 1003A 1004B 1005B 1005A N TB7 G TB7 H TB7 REC1 CP SL GR...

Страница 87: ...ase Voltage Monitor see page 111 The phase voltage monitor protects against high voltage phase imbalance and phase loss single phasing when any one of three line voltages drops to 74 or less of settin...

Страница 88: ...set if the fan is off Fan On Operation If the freezestat detects a freezing condition while the fan is on the MicroTech II controller shuts down the fans closes the outdoor air dampers opens the heati...

Страница 89: ...ed and an identical remote mounted keypad and display are provided with this option A remote mounted user interface UI is available as an option with all rooftop units The following items are provided...

Страница 90: ...ing readings on the MicroTech II control panel 1 Verify that power is supplied to the unit s MicroTech II control system The DesignFlow startup procedure cannot be completed without use of the MicroTe...

Страница 91: ...the vertical alignment mark on the vane Note The alignment mark is located 0 50 inch in from the bend on the outer edge of the vane It intersects with a hole located one inch up from the bottom outer...

Страница 92: ...ange move the bottom of the DesignFlow frame away from the outdoor air dampers toward the back end of the unit Do this by turning the long adjuster nut to decrease the L dimension in Figure 100 Note I...

Страница 93: ...gure 102 Fan rotation Once the fan is put into operation set up a periodic maintenance program to preserve the reliability and performance of the fan Items to include in this program are Belts Bearing...

Страница 94: ...s Unit running backwards See Prestarting Checks on page 90 Fan speed too low Increase fan speed Excessive dirt on propeller Clean propeller Excessive Noise Bearings Tighten bearing collars and setscre...

Страница 95: ...causing severe imbalance if left unchecked Use caution and do not allow water or solvents to enter the motor or bearings Under no circumstances should motors or bearings be sprayed with steam or water...

Страница 96: ...re closed To turn the lights off disconnect power to the entire unit or open system switch S1 The normally open disconnect switches are wired in series in a circuit that supplies 24VAC to the coil of...

Страница 97: ...Manually rotate all fans and verify that they rotate freely 10 Verify that the belts are tight and the sheaves are aligned 11 Verify that all setscrews and fasteners on the fan assemblies are still ti...

Страница 98: ...suitable for free cooling by displaying the keypad menu Temperature OA Damper OA Ambient Low indicates low outdoor air enthalpy High indicates high outdoor air enthalpy See Enthalpy Control on page 84...

Страница 99: ...the unit loses power the spring in the actuator should drive the valve wide open to the coil Check this by opening system switch S1 Air Balancing Air balancing should be performed by a qualified air b...

Страница 100: ...ep belts free from foreign material which may cause slippage 5 Make V drive inspection on a periodic basis Adjust tension if the belt is slipping Do not apply belt dressing This may damage the belt an...

Страница 101: ...Figure 111 on page 99 For two groove sheaves slide the sheave onto the motor shaft so that the side of the sheave with setscrew A is away from the motor see Figure 111 on page 99 2 To remove the flan...

Страница 102: ...ustment is made 3 Adjust the sheave to the desired pitch diameter by turning the outer locking ring with a spanner wrench Any pitch diameter can be obtained within the sheave range One complete turn o...

Страница 103: ...s type A B 2 L o c k i n g S c r e w s A E n d F l a n g e C e n t e r F l a n g e A s s e m b l y T h r e a d B a r r e l B a r r e l F l a n g e 1 8 S h o r t K e y H e r e L o n g K e y H e r e Art...

Страница 104: ...t into the calibrate mode by using the keypad menu Setup Service Unit Configuration Calibrate Mode and changing the value from NO to YES The calibrate mode automatically zeroes all static pressure sen...

Страница 105: ...one 1 1 or 3 Min Clg Spt 0 1 1 or 3 Max Clg Spt 100 1 1 or 3 Discharge Heating Disch Air xxx x F Htg Capacity xxx Eff Htg Spt xxx x F DAT Htg Spt 100 0 F 1 1 or 3 Htg Db 2 0 F Min Htg Spt 60 0 F Max H...

Страница 106: ...lg OAT 85 F Clg Zero OAT 100 F Unit Configuration AHU ID _____ Calibrate Mode No Space Sensor Yes EFT Sensor No ERcvry xxxxx hr 19 1or2 Time Date RF DFMax w oEx 95 DF Min w oExh 20 RF DFMin w oEx 15 D...

Страница 107: ...Htg Ena Slow 9 2 Ckt1 Comm Fail Slow 3 8 Ckt2 Comm Fail Slow 3 8 Genc Comm Fail Slow 3 8 HtgB Comm Fail Slow 9 2 ERecB CommFail Slow 19 1 or 2 Active Alarm 2 Alarm Name Alarm Type dd mmm yy hh mm ss...

Страница 108: ...tin No IM 684 or IM 685 Lubricate the door latch mechanisms Unit Storage Location The McQuay Rooftop Airhandling Unit is an outdoor unit However the schedule may dictate storage either on the ground o...

Страница 109: ...n fans Supply and return fan motors should have grease added after every 2000 hours of operation Use one of the greases shown in Table 16 on page 106 Using the following procedure relubricate the bear...

Страница 110: ...ent damage could occur Using Table 19 check the tightness of all setscrews with a torque wrench Note that if the return fan bearings setscrews must be retightened a special procedure is required to eq...

Страница 111: ...dial clearance can be adjusted by slightly loosening the funnel hold down fasteners shifting the funnel as required and retightening the fasteners Figure 116 20 DWDI airfoil wheel to funnel 015C to 03...

Страница 112: ...each MMP as a means to differentiate between a short circuit and overload trip conditions The MMP trip points are factory set Do not change unless the motor ampacity changes or the MMP is replaced wi...

Страница 113: ...ism to disconnect power to the unit prior to opening the door The handle can be padlocked in the OFF position while performing maintenance to the unit Figure 123 Through the door handle disconnect WAR...

Страница 114: ...etect harmful power line conditions When a harmful condition is detected its output relay is deactivated after a specified trip delay Trip Delay The output relay reactivates after power line condition...

Страница 115: ...1 Static Pressure Sensor Duct No 1 049545007 SPS2 Static Pressure Sensor Duct No 2 049545007 Static Pressure Sensor Building Space Pressure 049545006 T2 Transformer 115 24 VAC 060004601 T3 Transformer...

Страница 116: ...national at Minneapolis Minnesota A return goods tag will be sent to be included with the returned material Enter the information as called for on the tag in order to expedite handling at out factorie...

Страница 117: ...ths from that date Exceptions 1 If free warranty labor is available as set forth above such free labor does not include diagnostic visits inspections travel time and related expenses or unusual access...

Страница 118: ...McQuay IM 487 4 115 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Страница 119: ...116 McQuay IM 487 4 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Страница 120: ...McQuay IM 487 4 117 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Страница 121: ...For training information on all McQuay HVAC products please visit us at www mcquay com and click on training or call 540 248 9646 and ask for the Training Department This document contains the most c...

Страница 122: ...service in house repair center WE BUY USED EQUIPMENT Sell your excess underutilized and idle used equipment We also offer credit for buy backs and trade ins www artisantg com WeBuyEquipment REMOTE IN...

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