McQuay RoofPak RDS 802C Installation & Maintenance Data Download Page 37 | Manualshive

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Page 36 / IM 178

Typical Main Control Circuit (VAV Units)

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Summary of Contents for RoofPak RDS 802C

Page 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...

Page 2: ...1 Date January 1997 Installation Maintenance Data RoofPak Applied Rooftop Systems Air Handler RDS 800C 802C 1997 McQuay International L I S T E D L I S T E D C Artisan Technology Group Quality Instrum...

Page 3: ...ntrol Circuit CAV ZTC Units 37 Typical Main Control Circuit CAV DTC Units 38 Typical Actuator Control Circuit 39 Typical Supply Return Fan Control Circuit 39 Typical Gas Furnace Control Circuit 40 Mod...

Page 4: ...AV OM 108 Constant Air Volume Zone Temperature Control CAV ZTC OM 109 Constant Air Volume Discharge Temperature Control CAV DTC OM 110 When the equipment is received all items should be carefully chec...

Page 5: ...ol Entrances Outside Return Air Dampers Exhaust Hood Main Control Panel Discharge Plenum Cooling Coil Outside Air Louvers Return Air Fan Supply Air Fan Filter Section Heat Section Natural Gas Oil Stea...

Page 6: ...luded in the Wiring Diagrams section of this manual Figure 2 Control locations Return Air Economizer Filter Section Supply Fan Section Blow through Heat Section Blow through Coil Section Discharge Ple...

Page 7: ...6 SPS1 SPS2 NB1 DHL ADI SB1 OBB OBA T1 FB10 FB20 M20 M10 OL20 OL10 FB8 TB8 TB7 DSI or PB1 TB10 TB5 NB2 TB1 TB2 TB2 MCB1 T2 Main control panel Supply Fan Section Main Control Panel Electric Heat Contro...

Page 8: ...age 7 Electric heat control panel TB12 M43 M42 M41 FB43 FB42 FB41 M33 M32 M31 FB33 FB32 FB31 HL4 HL14 T5 SR1 SR2 SR3 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artis...

Page 9: ...B or C 16 position 665422B 02 8 position 665422B 03 4 position PC5 6 Filter switch Turns on clogged filter light on status panel Auto Filter sections As required 05 5 w c 05 w c 654938B 01 12 5 1245...

Page 10: ...allow flow of gas to pilot burner Normally Gas heating section N A N A N A 344884B 00 closed GV2 3 Main gas valves Open to allow flow of gas to main burner Normally Gas heating section N A N A N A See...

Page 11: ...shall be in accordance with the regulations of authorities having jurisdiction and all applicable codes It is the responsibility of the installer to determine and follow the applicable codes Sharpedge...

Page 12: ...box b Overhead obstructions shall be no less than 2 51 mm above the top of the unit c There shall be no overhead obstructions in the areas above the outside air and exhaust dampers that are farther t...

Page 13: ...arts E and F are not required on units with no return shaft within the curb perimeter 9 Parts G and H are not required on units with no supply shaft within the curb perimeter 38 8 984 7 5 191 2 51 X I...

Page 14: ...distance A Lift Only As Indicated Maximum recommended width for structural member is 5 127 mm to allow for adequate space for duct connections and electrical entry Rigging and Handling Lifting bracket...

Page 15: ...ension Z i e A Z X Y Where Z Total unit length in inches refer to certified drawings for this dimension X Outdoor return air section length refer to Table 3 for this dimension If A 288 7315 mm 4 point...

Page 16: ...e Unit Descrip tion section of this manual The duct static pressure sensing tap must be carefully located and installed Improper location or installation of the sensing tap will cause unsatisfactory o...

Page 17: ...ence pressure LO tap on the roof Keep it away from the condenser fans walls or anything else that may cause turbulence Mount it high enough above the roof so that it is not affected by snow If the ref...

Page 18: ...nimize This Dimension Note Drain line must not be run higher than this level A 8 203 mm Min or 2 x P Copper Tube one each end of coil See View A View A Drain Pan Static Pressure P in w c RDS units tha...

Page 19: ...and there are no refrigerant leaks the system should be evacuated The use of a vacuum pump with a pumping capacity of approxi mately 3 cu ft min and the ability to reduce the vacuum in the unit to at...

Page 20: ...each circuit Note The total operating charge per circuit should not exceed the pumpdown capacity per circuit specified by the condensing unit manufacturer Table 6 Approximate refrigerant charge per c...

Page 21: ...a fin height of 39 991 mm A factory installed three way valve piping and motor actuator is available for hot water coils in a heating only section see Figure 13 When no factory piping or valve is incl...

Page 22: ...erally the vacuum breaker is to be connected between the coil inlet and the return main However if the system has a flooded return main the vacuum breaker should be open to the atmosphere and the trap...

Page 23: ...unit and vestibule with silicone sealant along top and sides as shown Note Any holes cut in the floor of the unit must be sealed to prevent water leakage Figure 16d Step 3 1 Assemble side panels A an...

Page 24: ...s through a 90 degree angle to bring the economizer dampers from full open to full close Mechanical stops have been placed in the crankarm mounting bracket Do not remove stops If the crankarm is drive...

Page 25: ...tact the adjoining blade The blades will lock up if they are closed so far the seal goes over center 75 Figure 19 Intake hood damper 0 to 30 outside air These dampers are intended to remain at a fixed...

Page 26: ...atherproof opera tion After the unit has been set in place all door gaskets should be inspected for shipping damage and replaced if necessary It is recommended the unit be protected from overhead runo...

Page 27: ...uits can penetrate the cabinet bottom base frame or through the hinge and latch cap without interfering with the access panels Note All holes cut into the unit must be sealed to prevent water leakage...

Page 28: ...on the unit If side entrance is the only option a drilling location is provided The drilling dimen sions must be followed exactly to prevent damage to the control panel The dimensions provided are the...

Page 29: ...r death Connect only low voltage NEC Class II circuits to termi nal blocks TB2 and TB7 Reinstall and secure all protective deadfront panels when the wiring installation is complete Most field control...

Page 30: ...sure plug in the louvered fresh air intake area Replace the closure plug after removing lock down bolt All four bolts on each fan assembly must be removed Adjustment of spring mounts Each spring mount...

Page 31: ...After the spring mounts have been adjusted for level opera tion the thrust restraints should be checked With the fan off the adjustment nuts should be set so the spring is slightly compressed against...

Page 32: ...located next to each spring isolator These snubbers will allow free movement of the fan assem blies during normal operation because normal operation will not cause fan movements that exceed 25 6 mm H...

Page 33: ...n the ADI board If DH2 8 does not energize the controller will assume the fans did not start It will then shut down the unit and generate an alarm During the Recirculate operating state the outside ai...

Page 34: ...energizing relay R20 and opening its contacts in line 610 As a result the flame safeguard control is de energized all gas valves close the combustion air blower motor stops and gas valve actuator VM1...

Page 35: ...ensor Discharge Bulkhead OBA Output Board A Standard Main Control Box OBB Output Board B Cooling Main Control Box OBC Output Board C Heating Main Control Box OL9 10 Overload Relays Supply Fan Main Con...

Page 36: ...IM 178 Page 35 Typical Power Circuit Typical Compressor Staging Outputs Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 37: ...Page 36 IM 178 Typical Main Control Circuit VAV Units Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 38: ...IM 178 Page 37 Typical Main Control Circuit CAV ZTC Units Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 39: ...Page 38 IM 178 Typical Main Control Circuit CAV DTC Units Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 40: ...IM 178 Page 39 Typical Actuator Control Circuit Typical Supply Return Fan Control Circuit Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 41: ...o indicate operation Low fire start is provided by relay R23 The relay drives the gas valve actuator VM1 to the minimum firing rate position whenever the flame is not on and holds it there until the f...

Page 42: ...IM 178 Page 41 Typical Electric Heat Control Circuit Multistage Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...

Page 43: ...t is on when all phase voltages are within specified limits The phase voltage monitor is located on the load side of the power block with a set of contacts wired to the 115 volt control circuit to shu...

Page 44: ...eating valve will close If the freezestat closes again the heating valve will open and the 10 minute timer will reset The unit will remain shut down until the Freeze Stat Fail alarm is manually cleare...

Page 45: ...ontrols on both the supply and return fan it is important that both actuators have exactly 180 degree rotation to assure proper tracking of the two actuators NOTICE Inlet vanes must not be adjusted to...

Page 46: ...To Open 20 Closed Open 2 78 View 1 30 Wheel 800C 802C View 2 40 Wheel 802C Closed Open 60 A B X 3 00 20 Wheel 800C 2 80 24 Wheel 802C 180 CW To Open X 24 Closed Open Adjustable 11 8 28 mm slot Figure...

Page 47: ...el 7 If unit is curb mounted verify that the curb is properly flashed to prevent water leakage 8 Before attempting to operate the unit review the control layout description to become familiar with the...

Page 48: ...ing system switch S1 Economizer Start up Improper adjustment may damage the dampers Assure proper damper adjustment When an economizer is ordered without an actuator the linkage requires a 3 14 linear...

Page 49: ...re than five full turns for A belts or six full turns for B belts Adjust both halves of two groove sheaves by the same number of turns from closed to ensure that both grooves have the same pitch diame...

Page 50: ...isfac tory locking of the sheave If locking screws A are removed by accident and the gap is lost screw the outer locking ring down until it touches the inner locking ring Then back off the outer ring...

Page 51: ...e operating schedule as required keypad menus 25 and 26 15 Place the unit into the Calibrate mode by selecting it from keypad menu 11 Control Mode Calibrate will automatically zero all pressure sensor...

Page 52: ..._______ 14 Htg Control VAV CAV DTC Set Point ____ F ___________ Max OAT ____ F ___________ Programs ART1 ART2 ART3 Min Spt ____ F ___________ ART4 ART6 and ART8 Max Spt ____ F ___________ Reset No Res...

Page 53: ...ime ____ Sec ___________ and ART6 Mod Lim ____ WC ___________ Wait Time ____ Sec ___________ Max Step ____ Sec ___________ 20 Fan Balance VAV with fan Balance Off ___________ tracking control On Set M...

Page 54: ..._______ Sun hr mn hr mn ___________ Mon hr mn hr mn ___________ Tue hr mn hr mn ___________ Wed hr mn hr mn ___________ Thu hr mn hr mn ___________ Fri hr mn hr mn ___________ Sat hr mn hr mn ________...

Page 55: ...n ___________ 28 Service Mode Normal ___________ Shutdown Timers Normal ___________ Fast Space Sensor No ___________ Yes OAT Local ___________ Remote Duct Sensor 2 No ___________ Yes Alarm Out Blink _...

Page 56: ...and control voltages 8 Check the running amperage of all motors 9 Check all operating temperatures and pressures 10 Check and adjust all temperature and pressure controls as needed 11 Check and adjus...

Page 57: ...o assure that they have not loos ened If this is not done severe equipment damage could occur Using Table 16 check the tightness of all setscrews with a torque wrench Note that if the return fan beari...

Page 58: ...5 25 Funnel Wheel 18 9 31 9 31 Wheel Funnel C L Fan Winterizing Water Coils Coil freeze up can be caused by such things as air stratifica tion and failure of outdoor dampers and or preheat coils Routi...

Page 59: ...your nearest McQuay representa tive The order should include the component s part number and description and the model and serial numbers of the unit involved If it is determined that the failure of...

Page 60: ...f all other warranties There is no implied warranty of merchantability or fitness for a particular purpose In no event and under no circumstances shall the Company be liable for incidental or conseque...

Page 61: ...ard P O Box 1551 Minneapolis MN 55440 USA 612 553 5330 Printed on recycled paper containing at least 10 post consumer recycled material Artisan Technology Group Quality Instrumentation Guaranteed 888...

Page 62: ...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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