McQuay Skyline IM777 Installation And Maintenance Manual Download

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IM777

Page 15

Table 4: Wheel-to-inlet funnel relationship - plenum fans

Table 5: Wheel-to-inlet funnel relationship - inline fans

Table 6: Bearing collar and wheel hub setscrew torque

WHEEL — FUNNEL OVERLAP

SIZE

OVERLAP

.120

.190

16.5

.250

18.25

.310

.380

22.25

.440

24.5

.500

.560

.620

.750

36.5

.810

40.25

.880

OVERLAP

WHEEL — FUNNEL OVERLAP

SIZE

OVERLAP

150

.375

165

.438

182

.562

200

.625

222

.688

245

.750

270

.812

300

.875

SETSCREW

MINIMUM TORQUE

Diameter (inches)

ft. / lbs.

kg. / M.

1/4

5.5

.76

1/16

10.5

1.45

3/8

19.0

2.63

7/16

29.0

4.01

1/2

42.0

5.81

5/8

92.0

12.72

OVERLAP

Summary of Contents for Skyline IM777

Page 1: ...IM777 Page 1 Installation and Maintenance Manual IM777 Group Applied AIr Part Number IM777 Date April 2003 2003 McQuay International Skyline Outdoor Air Handler Sizes 003 055...

Page 2: ...ubrication 18 Fan Drive Adjustments 18 Drive Belt Adjustment 21 Front Load Filter Option 22 Winterizing Water Coils 23 Coil Maintenance 23 Component Removal Replacement 24 Warranty 26 Warranty Return...

Page 3: ...and are thoroughly inspected before leav ing the factory Care must be taken during installation to prevent damage to units 3 Take special care when handling the blower section All fans are dynamically...

Page 4: ...ained in front of elec trical power devices Electrical power devices that are mounted on the side of the unit are typically up to 12 deep See Figure 2 Figure 1 Servicing space requirements Figure 2 Se...

Page 5: ...uring shipping or rigging verify it is restored to its original posi tion Figure 6 on page 5 Use the following procedure to assemble shipping sections 1 Caulk all assembly joints of the unit The matin...

Page 6: ...are always provided with a service door on one side of the unit If requested on order doors can be provided on both sides of the unit Optional service doors are available for most section types and a...

Page 7: ...e 12 Flashing over top panels and sides of units Dampers and Hoods Side dampers may be provided in the mixing box and econo mizer sections of units When dampers are provided a removable panel is locat...

Page 8: ...ires no field assembly Face and bypass dampers may or may not be linked together When dampers are placed before a single bank of coils they are always linked together and require a single actuator Whe...

Page 9: ...densate in the coil Generally the vacuum breaker is to be connected between the coil inlet and the return main the vacuum breaker should be open to the atmosphere and the trap design should allow vent...

Page 10: ...k valve Steam main Return main 12 min Vacuum breaker 1 2 check valve Steam main Return main 12 min Full size of return conn Check Valve Strainer Gate Valve Control valve modulating two position Float...

Page 11: ...a close clearance over the drain pipes Extend the drain fitting with a coupling if necessary for door clearance See Figure 19 Note Outdoor drain traps should be made of a material that can withstand...

Page 12: ...uit location M o t o r F a n P O S 1 P O S 2 P O S 3 P O S 4 A i r f l o w F a n i s o l a t o r p o s i t i o n n u m b e r s D i m H S p r i n g h e i g h t a d j u s t m e n t s c r e w S p r i n g...

Page 13: ...Table 6 2 Recheck belt tension and adjust if necessary Belts ten sioned sufficiently to slip one to two seconds at startup will perform satisfactorily extending life and reducing vibration If retensi...

Page 14: ...wheels housed Notes 1 Dimensional relationship must be held to obtain rated air performance 2 Adjust dimension C by loosening wheel hub setscrews shifting wheel s axi ally as needed and retightening...

Page 15: ...EL FUNNEL OVERLAP SIZE OVERLAP 13 120 15 190 16 5 250 18 25 310 20 380 22 25 440 24 5 500 27 560 30 620 33 750 36 5 810 40 25 880 OVERLAP WHEEL FUNNEL OVERLAP SIZE OVERLAP 150 375 165 438 182 562 200...

Page 16: ...9 69 21 56 24 00 Maximum RPM Class I 3000 3000 2300 2000 1700 1500 Maximum RPM Class Il 4335 3918 3457 2858 2547 2255 FC24 50 300 250 200 150 100 90 80 70 60 50 Torque in lb Fan Speed rpm 800 850 900...

Page 17: ...shaft 3 Drive faulty a Variable pitch sheaves Axial and radial runout of flanges uneven groove spacing out of balance Also similar faults in driven sheave b Bad V belts lumpy or mismatched belt tensio...

Page 18: ...sheave be replaced with a properly sized fixed sheave Initially it is best to have a variable pitched motor sheave for the purpose of air balancing but fixed sheaves maintain balancing and alignment m...

Page 19: ...two groove sheaves allow room between the sheave and motor to get to capscrews E 5 Insert key C between the sheave and the shaft and tighten setscrew A securely 6 If flange and locking ring have been...

Page 20: ...turns for the A belts or 6 turns for the B belts Do not open C sheaves more than 9 1 2 turns Do not open 5V sheaves more than 6 turns Do not open 8V sheaves more than 8 turns 6 Tighten BOTH locking sc...

Page 21: ...belt and cause early failure Tension Measurement Procedure 1 Measure the belt span See Figure 29 2 Place belt tension checker squarely on one belt at the cen ter of the belt span Apply force to the c...

Page 22: ...740 15 5 23 4 17 1 25 5 1741 3000 14 6 21 8 16 8 25 0 WARNING Moving belt and fan can cause severe personal injury or death During installation and filter maintenance 1 Verify that the belt and fan gu...

Page 23: ...nder normal operating conditions and if dirty brush or vacuum clean Use a chemical coil cleaner on multiple row coils Read and follow the chemi cal cleaner s instructions as some cleaners may contain...

Page 24: ...oil bulkheads to prevent any air bypass around the coil Once the coil is in place fasten coil to the section Caulk the seams between the coil casings and bulkheads See Figure 31 2 If this is an additi...

Page 25: ...ping and remove the brass plugs for the vents and drains located in the connections 2 Panels on both the connection and opposite connection end of the coil section need to be removed to access bolts h...

Page 26: ...t be prepaid The return of the part does not constitute an order for replacement Therefore a purchase order must be entered through the nearest McQuay representative The order should include part numb...

Page 27: ...IM777 Page 27 Notes...

Page 28: ...777 This document contains the most current product information as of this printing For the most up to date product information please go to www mcquay com 2003 McQuay International www mcquay com 800...

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