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McQuay IM 777-4

27

Service and Maintenance

Figure 39: Drive Belt Adjustment

WARNING

Moving belt and fan can cause severe personal injury or
death.

During installation and filter maintenance:

•

Verify that the belt and fan guards on plenum fan units are
always in place.

•

Lock and tag out fans to prevent accidental start up.

•

Do not enter the filter compartment until the fan is
completely stopped.

•

Use approved equipment for reaching filters located above
normal reach. Do not step on filter frames or unit
components.

•

Floor surfaces must be dry and free of oil or grease.

Belt span

Deflection =

Belt span

64

WARNING

Pendant l’installation et où l’entretien des filtres, une courroie
en mouvement ou un ventilateur en opération peuvent causer
des blessures graves où même causer la mort.

•

S’assurer que les gardes de courroie et de ventilateur sont
toujours en place.

•

Verouiller les démarreurs des ventilateurs et afficher un avis
de mise-en-garde afin de prévenir tout accident ou
démarrage.

•

Attendre que le ventilateur soit complètement arrêté avant
d’entrer dans l’unité.

•

Utiliser seulement des équipements approuvé pour joindre
les bancs de filtres; ne pas mettre soit sur les cadres des
filtres ou même sur toutes composantes de l’unité.

•

La surface des planchers doit être sec et libre de toute trace
d'huile et où de graisse.

Table 18: Belt Deflection Force (per Browning

®

specifications)

Cross

section

Sheave diameter (in)

Deflection force (lbs)

Smallest

sheave

diameter range

rpm

range

Cross section A, B, 5V

Cross section AX, BX, 5VX

Used belt

New belt

Used belt

New belt

A, AX

3.0 to 3.6

1000 to 2500

3.7

5.5

4.1

6.1

2501 to 4000

2.8

4.2

3.4

5.0

3.8 to 4.8

100 to 2500

4.5

6.8

5.0

7.4

2501 to 4000

3.8

5.7

4.3

6.4

5.0 to 7.0

1000 to 2500

5.4

8.0

5.7

9.4

2501 to 4000

4.7

7.0

5.1

7.6

B, BX

3.4 to 4.2

850 to 2500

4.9

7.2

2501 to 4000

4.2

6.2

4.4 to 5.6

860 to 2500

5.3

7.9

7.1

10.5

2501 to 4000

4.5

6.7

7.1

9.1

5.8 to 8.6

860 to 2500

6.3

9.4

8.5

12.6

250 to -4000

6.0

8.9

7.3

10.9

5V, 5VX

4.4-6.7

500-1749

10.2

15.2

1750-3000

8.8

13.2

3001-4000

5.6

8.5

7.1-10.9

500-1740

12.7

18.9

14.8

22.1

1741-3000

11.2

16.7

13.7

20.1

11.8-16.0

500-1740

15.5

23.4

17.1

25.5

1741-3000

14.6

21.8

16.8

25.0

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Содержание Skyline OAC 003

Страница 1: ...Installation and Maintenance Manual IM 777 4 Skyline Air Handler Group Applied Air Systems Part Number IM 777 Date May 2009 2009 McQuay International Models OAC OAH 003G 090G...

Страница 2: ...Water Heating Coils 13 Drain Pan Traps 13 Internal Isolation Assembly Adjustment 14 Electrical Installation 16 Wiring 16 Operation Guidelines 17 Startup Checks 17 Before Starting the Unit 17 Fan Wheel...

Страница 3: ...ion to verify this has not happened Note Screws bolts etc for assembling sections are supplied in a bag attached to each section All necessary gasketing is applied in the factory for section to sectio...

Страница 4: ...be lifted using the 2 diameter lifting holes located in the corners of each shipping section To prevent damage to the unit cabinetry use spreader bars Position spreader bars to prevent cables from ru...

Страница 5: ...ils together first using the 3 8 16 5 bolts located in the splice kit provided with the unit Figure 7 a To fasten two shipping sections together four bolts are needed two on each side of the unit The...

Страница 6: ...channels when the unit sections are joined Touch up any places where gaps are noted 2 After sections are seated tightly together slip the splice cap over the top panel flanges Bend the ends of the sp...

Страница 7: ...ost section types and are provided based on customer request Fan Section Doors Note Opening fan section doors requires using a 1 2 socket wrench which satisfies ANSI standards and other codes that req...

Страница 8: ...can occur If larger heavier components require mounting on unit panels use through bolts with flat washers through both outer and inner panels To maintain panel integrity seal both ends with an indus...

Страница 9: ...e location of these actuators due to the number of options and arrangements available and the variety of specific applications Typically actuators are mounted inside the cabinet Provide proper support...

Страница 10: ...stallation information in ASHRAE handbooks Observe all local codes and industry standards Do not apply undue stress at the connection to coil headers always use a backup pipe wrench Support pipework i...

Страница 11: ...bucket traps Use thermostatic traps only for air venting Use bucket traps for on off control only Locate traps at least 12 inches below the coil return connection Multiple coil installation individual...

Страница 12: ...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 and thermostatic tr...

Страница 13: ...ain pan trap to allow condensate to drain freely On both blow through and draw through units the trap depth and the distance between the trap outlet and the drain pan outlet must be twice the static p...

Страница 14: ...ghten the cap screw when adjustments are completed For models 040 through 090 the isolators should be at equal For models 040 through 090 the isolators should be at equal height during fan operation 6...

Страница 15: ...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 h e i g h t a d j u s t m e n t s c r e w S h i p p i n g h o l d d o w n s c r e w S h i p p i n g...

Страница 16: ...agout procedures to ensure that power can not be energized For variable frequency drives or other energy storing components that have been furnished and mounted by either McQuay or by others refer to...

Страница 17: ...perty damage personal injury or death Wire fan power supply and ground motor frame in accordance with local electric codes AVERTISSEMENT Risques d incendie et d lectrocution pouvant causer des dommage...

Страница 18: ...C by loosening wheel hub setscrews shifting wheel s axially as needed and retightening setscrews Figure 28 Wheel to Inlet Funnel Relationship Plenum Fans Table 3 Wheel to Inlet Funnel Relationship Ai...

Страница 19: ...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 Table 6 Wheel to Inlet Funnel Relationship Inline Fans Table 8 Unit Sizes 003 to 035 Fan operating limits Forward curved housed Dia...

Страница 20: ...00 AF24 50 AF22 25 AF20 00 AF38 50 AF33 00 AF30 00 500 600 700 800 2000 1000 1500 1500 2000 3000 2500 Torque in lb Table 10 Operating Limits Plenum Fans Fan operating limits Plenum fans Diameter 13 5...

Страница 21: ...t or debris on wheel blades b Loose set screws in wheel hub or bearing to shaft c Wheel distorted from overspeed 2 Bent shaft 3 Drive faulty a Variable pitch sheaves Axial and radial runout of flanges...

Страница 22: ...F safe operating temperature See below for specific recommended lubricants Table 13 Recommended Lubricants and Amounts for Fan Motor Bearings Mfr Grease NEMA Size Amount to Add oz Texaco Polystar or P...

Страница 23: ...ning the belt tension and increasing or decreasing the pitch diameter of the sheave by half or full turns as required Readjust belt tension before starting drive 6 To provide the same pitch diameter a...

Страница 24: ...D and capscrews E 9 Put on belts and adjust belt tension Do not force belts over grooves See Fan Drive Belt page 26 10 Before starting the drive ensure that all keys are in place and all setscrews an...

Страница 25: ...the following a Do not open B sheaves more than 4 3 4 turns for the A belts or 6 turns for the B belts b Do not open C sheaves more than 9 1 2 turns c Do not open 5V sheaves more than 6 turns d Do not...

Страница 26: ...2 Place belt tension checker squarely on one belt at the center of the belt span Apply force to the checker perpendicular to the belt span until the belt deflection equals belt span distance divided...

Страница 27: ...endre que le ventilateur soit compl tement arr t avant d entrer dans l unit Utiliser seulement des quipements approuv pour joindre les bancs de filtres ne pas mettre soit sur les cadres des filtres ou...

Страница 28: ...conditioning unit may have some moisture Algae etc can grow due to airborne spores and bacteria Periodic cleaning is necessary to prevent this buildup from plugging the drain and causing the drain pa...

Страница 29: ...s that hold the neoprene canvas in place around the discharge opening 4 Disconnect the fan sled from each of the corner mounts and pull the entire assembly out the side of the unit 5 After the fan sle...

Страница 30: ...il to the section 4 Caulk the mounting surface of the steel plate and install the plate on the coils 5 Caulk the mounting surface of the drain trough and install the drain trough on the coils 6 Caulk...

Страница 31: ...s refer to the model number and serial number of the unit stamped on the serial plate attached to the unit If replacement parts are required mention the date of installation of the unit and date of fa...

Страница 32: ...returned material Enter the required information to expedite handling and prompt issuance of credits All parts must be returned to the appropriate McQuay facility designated on the Return Goods tag Tr...

Страница 33: ...ed all setscrews on pulleys bearings and fans Yes No N A D Have the hold down bolts been backed off on spring mounted fan isolators Yes No N A E With power off do fans turn freely by hand Yes No N A F...

Страница 34: ...I HEAT RECOVERY A Heat wheel rotates freely Yes No N A B Heat wheel VFD operates properly Yes No N A C Heat wheel VFD model _____________________ serial _____________________ N A D Check for air bypas...

Страница 35: ...binet have any air leakage Yes No N A Location on unit ___________________________________________________________________________ 5 Were there any refrigerant leaks Yes No N A Shipping Workmanship De...

Страница 36: ...on training or call 540 248 9646 and ask for the Training Department Warranty All McQuay equipment is sold pursuant to its standard terms and conditions of sale including Limited Product Warranty Con...

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