Specifications

ManualsBrandsCarrier ManualsAir Compressor39LG

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 533-932 Printed in U.S.A. Form 39L-6SI Pg 1 114 2-04 Replaces: 39L-5SI

Installation, Start-Up and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . .1 ,2

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,3

Unit Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

PREINSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Suspended Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Service Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

External Vibration Isolators. . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-29

Mixing Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Inlet Guide Vane Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Install Fan Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Install Sheaves on Motor and Fan Shafts . . . . . . . . . . . . . .11

Install V-Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Water and Steam Piping Recommendations . . . . . . . . . . 14

Coil Freeze-Up Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Refrigerant Piping, Direct Expansion

(DX) Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Electric Heaters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Discharge Modification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29,30

Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30-38

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Fan Motor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Winter Shutdown (Chilled Water Coil Only) . . . . . . . . . . . 30

Field-Installed Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Coil Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Changing Coil Hand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Filters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Fan Shaft Bearing Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Fan and Shaft Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

METRIC CONVERSION CHART . . . . . . . . . . . . . . . . . . . . . . . 39

SAFETY CONSIDERATIONS

Air-handling equipment is designed to provide safe and

reliable service when operated within design specifications. To

avoid injury to personnel and damage to equipment or property

when operating this equipment, use good judgment and follow

safe practices as outlined below.

DANGER

NEVER enter an enclosed fan cabinet or reach into a unit

while the fan is running.

LOCK OPEN AND TAG the fan motor power disconnect

switch before working on a fan. Take fuses with you and

note removal on tag. Electric shock can cause personal

injury or death.

LOCK OPEN AND TAG the electric heat coil power dis-

connect switch before working on or near heaters.

WARNING

CHECK the assembly and component weights to be sure

that the rigging equipment can handle them safely. Note

also, the centers of gravity and any specific rigging

instructions.

CHECK for adequate ventilation so that fumes will not

migrate through ductwork to occupied spaces when weld-

ing or cutting inside air-handling unit cabinet or plenum.

WHEN STEAM CLEANING COILS be sure that the area

is clear of personnel.

DO NOT attempt to handle access covers and removable

panels on outdoor units when winds are strong or gusting

until you have sufficient help to control them. Make sure

panels are properly secured while repairs are being made to

a unit.

DO NOT remove access panel fasteners until fan is com-

pletely stopped. Pressure developed by a moving fan can

cause excessive force against the panel which can injure

personnel.

DO NOT work on dampers until their operators are

disconnected.

BE SURE that fans are properly grounded before working

on them.

WARNING

DO NOT USE TORCH to remove any component. System

contains oil and refrigerant under pressure.

To remove a component, wear protective gloves and gog-

gles and proceed as follows:

a. Shut off electrical power to unit.

b. Recover refrigerant to relieve all pressure from sys-

tem using both high-pressure and low pressure ports.

c. Traces of vapor should be displaced with nitrogen

and the work area should be well ventilated. Refrig-

erant in contact with an open flame produces toxic

gases.

d. Cut component connection tubing with tubing cutter

and remove component from unit. Use a pan to catch

any oil that may come out of the lines and as a gage

for how much oil to add to the system.

e. Carefully unsweat remaining tubing stubs when nec-

essary. Oil can ignite when exposed to torch flame.

Failure to follow these procedures may result in personal

injury or death.

39LA,LB,LC,LD,LF,LG,LH03-25

Indoor Air-Handling Units



Summary of content (40 pages)

PAGE 1
39LA,LB,LC,LD,LF,LG,LH03-25 Indoor Air-Handling Units Installation, Start-Up and Service Instructions CONTENTS WARNING Page SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . .1 ,2 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,3 Unit Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 PREINSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7 Rigging . . . . . . . . . .
PAGE 2
 IMPORTANT: The installation of air-handling units and all associated components, parts, and accessories which make up the installation and subsequent maintenance shall be in accordance with the regulations of ALL authorities having jurisdiction and MUST conform to all applicable codes. It is the responsibility of the installing contractor to determine and comply with ALL applicable codes and regulations.
PAGE 3
114 LEGEND COMB. — Combination PH — Preheat POS. — Position Factory-installed option components  Fig.
PAGE 4
Suspended Units — Figure 6 shows overhead suspen- PREINSTALLATION sion of unit using optional factory-supplied suspension channels. Each support channel consists of 2 pieces, the smaller of which fits inside the larger one. This allows the channel to be adjusted to the required length for installation. Channels are shipped on top of the unit. The 2 sections of each channel are shipped one inside the other, and are held in place during shipping by the panel screws in the top panel.
PAGE 5
NOTE: Dimensions in ( ) are in mm. DIMENSIONS (mm) DIMENSIONS (ft-in.
PAGE 6
Table 1 — Physical Data UNIT SIZE UNIT WEIGHTS (lb)* 39LA 39LB 39LC 39LD 39LF 39LG 39LH COMPONENT WEIGHTS (lb) Mixing Box Section Filter Mixing Box Angle Filter Section Flat Filter Section Access Section Preheat (Water) Section Preheat (Electric) Section TYPICAL DRY COIL WEIGHTS (lb) Large Face Area Cooling Coils, 1/2-in. OD (Chilled Water & DX)† 4-Row 6-Row Small Face Area Cooling Coils, 1/ -in. OD (Chilled Water & DX)† 2 4-Row 6-Row 8-Row Hot Water Coils, 1/2-in. OD† 1-Row 2-Row Steam Coils, 1-row, 1-in.
PAGE 7
DIFFERENTIAL 1 H DRAIN NIPPLE FAN OFF DIFFERENTIAL 2 TRAP CONDITION WHEN FAN STARTS NOTE: Lift in one piece. Use slings and spreader bars at each lifting bracket. Fig. 5 — Unit Rigging Details COOLING COIL DRAIN PAN FAN RUNNING AND CONDENSATE DRAINING Fig. 7 — Condensate Drain Fig.
PAGE 8
INSTALLATION Mixing Box DAMPER ACTUATORS — The 39L mixing boxes are supplied with low leak dampers and blade and edge seals. Damper operating torques are shown in Table 2. The actuator and mounting brackets are field supplied and may be mounted inside or outside the unit. A typical inside mounting bracket is shown in Fig. 8. For external mounting of actuators, drill or punch a hole in the exterior panel. NOTE: If the unit is shipped with AirManager™ controls, actuator(s) are factory-supplied.
PAGE 9
Table 3 — Recommended Actuators ACCESSORY PACKAGE NO. ACTUATOR PART NO. VOLTAGE (50/60 Hz) VA 33AMACTDMP133 33AMACTGV-133 33AMACTGV-266 HF27BJ035* HF27BJ033 HF27BJ034 24 24 24 10 4 6 ROUND SHAFT SIZE MIN-MAX (in.) .750-1.050 .375- .625 .475- .750 TIMING (sec) DAMPER AREA (sq ft) Parallel Opposed 44 N/A N/A 53 N/A N/A 150 < 150 135 TORQUE (in.-lb) MAXIMUM STROKE (degrees) MAXIMUM WIRE LENGTH (ft) 133 133 266 90 90 90 300 725 450 3.
PAGE 10
11. If a second actuator is required, repeat the process for a second actuator. The second actuator mounts on the opposite side of the fan on the opposite end of the jackshaft. ACTUATOR WIRING — To wire the actuator, perform the following: 1. Each actuator is supplied with a length of plenum rated cable. Route the cable from the actuator to the exterior of the unit. Allow a sufficient service loop to provide free movement of the fan sled. 2. At the desired location for field connection, drill a 3/8-in.
PAGE 11
JACKSHAFT CRANKARM ANTIROTATION STRAP INSTALLED (ACTUATOR NOT SHOWN FOR CLARITY) Fig. 11 — IGV Actuator Bracket Installation CONNECTING ROD IGV ACTUATOR ANTIROTATION STRAP IGV JACKSHAFT INLET GUIDE VANES (IGV) Fig. 12 — IGV Actuator Mounting supply air; thus, condensate can form inside the junction box and, possibly, on the live terminal lugs.
PAGE 12
3. Rotating each sheave a half revolution will determine whether the sheave is wobbly or the drive shaft is bent. Correct any misalignment. 4. With sheaves aligned, tighten cap screws evenly and progressively. NOTE: There should be a 1/8-in. to 1/4-in. gap between the mating part hub and the bushing flange. If gap is closed, the bushing is probably the wrong size. 5. With taper-lock bushed hubs, be sure the bushing bolts are tightened evenly to prevent side-to-side pulley wobble.
PAGE 13
SMALL BELT SHEAVE CROSS SECTION PD RANGE (in.) 3.0- 3.6 3.8- 4.8 5.0- 7.0 3.4- 4.2 4.4- 5.6 5.8- 8.6 7.0- 9.4 9.6-16.0 2.65-3.65 4.12-6.90 4.40-6.70 7.1-10.9 11.8-16.0 12.5-17.0 18.0-22.4 A B C 3V Fig. 14 — Sheave Alignment 5V 6. To determine correct belt tension, use the deflection formula given below and the tension data from Fig. 15 as follows: EXAMPLE: Given Belt Span 16 in. Belt Cross-Section A, Super Belt Small Sheave PD 5 in.
PAGE 14
dispense with the ¼-in. petcock for continuous venting located above the vacuum breaker (check valve). Note the horizontal location of the 15-degree check valve, and the orientation of the gate/pivot. This valve is intended to relieve any vacuum forming in the condensate outlet of a condensing steam coil, and to seal this port when steam pressure is again supplied to the coil. It must not be installed in any other position, and should not be used in the supply line.
PAGE 15
Variation in load on different coils in the same bank may be caused by several factors. Two of the most common are uneven airflow distribution across the coil and stratification of inlet air across the coil. 8. Do not try to lift condensate above the coil return into an overhead main, or drain into a main under pressure with a modulating or on/off steam control valves. A pump and receiver should be installed between the coil condensate traps and overhead mains and return mains under pressure. 9.
PAGE 16
NOTES: 1. A bypass is necessary around trap and valves when continuous operation is necessary. 2. Bypass to be the same size as trap orifice but never less than 1/ inch. 2 Fig. 19 — Dripping Steam Supply to Condensate Return NOTES: 1. Flange or union is located to facilitate coil removal. 2. When control valve is omitted on multiple coils in parallel air flow. 3. When a bypass with control is required. 4. Coils with different pressure drops require individual traps.
PAGE 17
Refrigerant Piping, Direct-Expansion (DX) Coils (Fig. 23) — Direct-expansion coils are divided into 2 or 4 splits depending upon the unit size and coil circuiting. See Table 7 for coil circuiting data. Each split requires its own distributor nozzle, expansion valve, and suction piping. Suction connections are on the air entering side when the coil is properly installed. Matching distributor connections for each coil split are on the air leaving side.
PAGE 18
Table 5 — Chilled Water Coil Circuiting Data (cont) COIL TYPE CIRCUITING Q H F D H F D H F D 4-ROW 6-ROW 8-ROW* COIL TYPE 4-ROW 6-ROW 8-ROW* SMALL FACE AREA (39LB, 39LC, 39LF) UNIT SIZE 03 06 08 Face Area (sq ft) 2.72 4.72 6.58 No. Connection No. Connection No.
PAGE 19
SUCTION PIPING — Connect suction piping as shown in Fig. 24 for face split coil or Fig. 25 for row split coil. Suction line from coil connection to end of the 15-diameterlong riser should be same tube size as coil connection to ensure proper refrigerant velocity. Refer to Carrier System Design Manual, Part 3, and size remaining suction line to compressor for a pressure drop equivalent to 2.0 F. This will provide a total suction line header pressure drop equivalent to approximately 2.5 F. Refer to Fig.
PAGE 20
Table 7 — Direct Expansion Coil Circuiting Data UNIT SIZE CIRCUITING TYPE CFM AT 550 FPM FACE AREA (sq ft) TUBE FACE TUBE LENGTH (in.) NUMBER OF CIRCUITS NUMBER OF TXVs NUMBER OF CIRCUITS/TXV† SUCTION CONNECTIONS (in. OD) DISTRIBUTOR CONNECTIONS (in. OD) 4-ROW COIL Circuit Equivalent Length (ft) Distributor Tube Length (in.) Face Split Row Split Distributor Nozzle Size** 6-ROW COIL Circuit Equivalent Length (ft) Distributor Tube Length (in.
PAGE 21
Table 7 — Direct Expansion Coil Circuiting Data (cont) UNIT SIZE CIRCUITING TYPE CFM AT 550 FPM FACE AREA (sq ft) TUBE FACE TUBE LENGTH (in.) NUMBER OF CIRCUITS NUMBER OF TXVs NUMBER OF CIRCUITS/TXV† SUCTION CONNECTIONS (in. OD) DISTRIBUTOR CONNECTIONS (in. OD) 4-ROW COIL Circuit Equivalent Length (ft) Distributor Tube Length (in.) Face Split Row Split Distributor Nozzle Size** 6-ROW COIL Circuit Equivalent Length (ft) Distributor Tube Length (in.
PAGE 22
Table 8 — Distributor Part Numbers PART NO. Sporlan 1112-2-1/4 1112-3-1/4 1112-4-1/4 1112-5-1/4 1112-6-1/4 1113-7-1/4 1113-8-1/4 1115-8-1/4 1115-9-1/4 1115-10-1/4 1116-11-1/4 1117-11-1/4 1117-12-1/4 1117-13-1/4 1126-14-1/4 1126-15-1/4 1126-16-1/4 1126-17-1/4 Carrier EA07NC261 EA07FC027 EA07NC262 EA07NC263 EA07NC264 EA07HC207 EA07HC208 EA07KC240 EA07KC241 EA07KC242 EA07HC011 EA07LC510 EA07HC012 EA07HC013 EA07TC290 EA07HC015 EA07TC207 EA07HC017 SPORLAN NO. CONNECTION NOZZLE OF OD (in.
PAGE 23
SPECIAL PIPING WITH 4 SPLITS PER COIL Manifolding for 2-Face Splits — Refer to Fig. 29 and externally manifold as follows: 1. Connect the 4 expansion valves to the 4 distributors on each coil and connect the 4 suction lines to the 15-diameter-long risers as outlined in previous piping instructions. 2. Install common liquid line for upper face split to first (upper) and second expansion valves.
PAGE 24
TXV — Thermostatic Expansion Valve Fig. 29 — Face Split Coil Manifolding (Typical) TXV — Thermostatic Expansion Valve Fig.
PAGE 25
Electric Heaters — Electric heaters may be factory in- stalled or drop shipped to the jobsite and field installed. The heater can only be installed in the preheat-electric section. To install electric heater, refer to Fig. 31 and proceed as follows: 1. Locate preheat-electric section already mounted on unit and remove protective shipping cover. 2. Locate crate containing electric heater and verify heater matches the unit. Unit hand and heater hands must agree. 3.
PAGE 26
NOTE: All wiring must be copper and must conform to the NEC (National Electrical Code). Fig.
PAGE 27
Table 10 — Electric Heater Data UNIT HEATER SIZE AREA 39L (sq ft) 03 2.2 06 3.7 08 5.1 10 6.2 12 7.3 15 10.0 18 11.74 21 14.21 25 17.79 ARI AWG FLA kW MCA MOCP — — — — — — NOMINAL NO. OF HEATER COIL FACE CONTROL COIL VELOCITY STEPS* kW (fpm) 9 500 3 15 500 17.2 500 8 500 10 500 17 500 6 19.9 500 27 500 29.8 500 36 500 15 500 25 500 35 500 6 39.9 500 43.2 500 51 500 15 500 25 500 39.9 500 6 47.3 500 51.8 500 59.8 500 19.9 500 29.8 500 39.9 500 6 43 500 51.8 500 72 500 19.9 500 29.
PAGE 28
1. Sizes 03-18 without inlet guide vanes (IGVs) — See Fig. 33. It is not necessary to remove the bearing support channels from the fan housing. Sizes 21 and 25 without IGV and 06-25 with IGVs — See Fig. 34. The “A” frame support must be removed. To change from upblast to horizontal discharge or from horizontal to upblast discharge, the bearings must be relocated to keep the wheel centered in the housing.
PAGE 29
THF THR UBF UBR — — — — LEGEND Top Horizontal Front Top Horizontal Rear Upblast Front Upblast Rear Fig. 34 — Fan Discharge Positions, Fans with IGVs START-UP Check List — Make a walkway inside unit components to protect insulation. Remove all construction debris from unit interior. Remove walkway before starting unit. FILTERS — Install unit filters in all filter sections. FANS 1. Check lubrication of fan, motor bearings, and linkages. a.
PAGE 30
6. Check fan speed with a strobe-type tachometer or use the following formula: Obtain the motor rpm from the fan motor nameplate and read sheave pitch diameters marked on the fan and motor pulleys, or estimate the pitch diameters by using the pulley outside diameters. Then: Fan Rpm = DX Coil — Charge refrigerant. Also refer to condensing unit service and installation instructions. Refrigerant operating charge for unit coil is shown in Table 1. SERVICE General Motor Rpm x Motor Sheave Pitch Diameter (in.
PAGE 31
install the coil with the downstream bottom of the coil attached to the upright mounting flange as shown in Fig. 36. Adjust the coil and then attach the top coil baffle to the top flange provided. 6. If solution is too weak, add more antifreeze until desired strength is reached, then circulate solution through coil for 15 minutes or until concentration is satisfactory. 7. Remove upper line from reservoir to reversible pump. Drain coil to reservoir and then close service valve. 8.
PAGE 32
1 2 3 4 5 6 7 — Accessory Side Panel — Left Side Panel — Top Panels — Baffle Screws — Piping — Right Side Panels — Right Support Panel LEGEND 8 — Condensate Baffle 9 — Holddown Screws 10 — Coil 11 — Holddown Screws 12 — Left Support Panel 13 — Inside Baffle Fig. 38 — Horizontal Unit Slant Coil Removal (39LA Units — Sizes 03-21) 6. Remove screws from inside baffle (item 14). Leave baffle attached to left side panel (Item 16). 7. Remove left side panel (Item 16).
PAGE 33
1 2 3 4 5 6 7 8 9 — — — — — — — — — Fan Side Panel Fan Access Door Screws Angle Baffle Screws Piping Right Side Panels Right Support Panel Condensate Baffle LEGEND 10 — Holddown Screws 11 — Coil 12 — Holddown Screws 13 — Left Support Panel 14 — Inside Baffle 15 — Accessory Side Panel 16 — Left Side Panels 17 — Rear Panel Fig. 39 — Vertical Unit Slant Coil Removal (39LD Units — Sizes 03-21) HORIZONTAL OR VERTICAL UNIT — DUAL COIL REMOVAL (39LA,39LD units — size 25) — (NOTE: Item numbers are in Fig.
PAGE 34
1 2 3 4 5 — — — — — Accessory Side Panel Left Side Panel Top Panels Baffle Angle Screws Piping LEGEND 6 — Right Side Panels 7 — Inside Baffle 8 — Horizontal Baffle 9 — Upper Condensate Pan 10 — Baffle Screw Fig. 40 — Horizontal or Vertical Unit — Dual Coil Removal (39LA,LD Units, Sizes 25) HORIZONTAL OR VERTICAL UNIT — VERTICAL COIL REMOVAL (39LB,LC,LF,LH Units) — Item numbers are in Fig. 41 unless otherwise indicated. 1. Refer to Fig. 4 for service area requirements. 2. Disconnect piping (Item 6). 3.
PAGE 35
1 2 3 4 — Accessory Side Panel — Left Side Panel — Inside Baffles — Top Panels 5 6 7 8 LEGEND — Baffle Angle Screw — Piping — Right Side Panel — Baffle Screw Fig. 41 — Horizontal or Vertical Unit — Vertical Coil Removal (39LB,LC,LF,LH Units) result is often experienced if after-market fin coatings are applied.
PAGE 36
2. Use a vacuum breaker in the return. 3. Do not use overhead returns from the coil. A floodback can occur. 4. An immersion thermostat to control outdoor-air dampers and the fan motor is recommended. This control is activated when the steam supply fails or the condensate temperature drops below a predetermined temperature, usually 120 F. 5. On low pressure and vacuum systems, the immersion thermostat may be replaced by a condensate drain with a thermal element.
PAGE 37
Table 12 — Filter Data 39L UNIT SIZE Angle Filter Section Filter Qty…Size (in.) Nominal Face Area (sq ft) Filter Mixing Box Section Filter Qty…Size (in.) Nominal Face Area (sq ft) Flat Filter Section Filter Qty…Size (in.) Nominal Face Area (sq ft) 03 06 2…16x25 4…16x20 5.56 8.89 2…16x25 4…16x20 5.56 8.89 08 2…16x20 2…16x25 10.00 2…16x20 2…16x25 10.00 10 12 15 18 4…16x25 6…16x20 9…16x20 12…16x20 11.11 13.33 20.00 26.67 4…16x25 6…16x20 9…16x20 9…16x20 11.11 13.33 20.00 20.
PAGE 38
10. Check fan shaft diameter at bearing mount. If worn by more than .001 in. below nominal, shaft should be replaced. 11. Install new bearing, tighten holddown bolts and then tighten bearing locking collar and setscrews. 12. Make certain fan wheel does not rub sides of fan housing after installing new bearings. 13. Recoat fan shaft with a rust inhibitor or grease. 14. Replace sheave and belts. Adjust and align as described in Installation sections on installing sheaves and V-belts. 15.
PAGE 39
METRIC CONVERSION CHART 39
PAGE 40
Copyright 2004 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 533-932 Printed in U.S.A.