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39LA,LB,LC,LD,LF,LG,LH03-25
Indoor Air-Handling Units
Installation, Start-Up and
Service Instructions
CONTENTS
Page
CHECK the assembly and component weights to be sure
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
that the rigging equipment can handle them safely. Note
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,3
also, the centers of gravity and any specific rigging
Unit Identification. . . . . . . . . . . . . .
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INTRODUCTION Unit Identification — The 39L units are identified by the 18-digit part number listed on the serial plate. The part number describes all component, coil, motor, drive, and control selections. See Fig. 1-3 for unit identification. Fig. 1 — Unit Identification 39L C 10 GK C H E A C G - A Due to the complexity of the (18 position) 39L model number, use the “verify model number” function in the AHUBuilder® software for a detailed model explanation. The description below can be used as a
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3 LEGEND COMB. — Combination PH — Preheat POS. — Position Factory-installed option components Fig. 3 — Position 4, Unit Configuration Model (Component Sequence Also Shown)
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PREINSTALLATION Suspended Units — Figure 6 shows overhead suspen- sion of unit using optional factory-supplied suspension 1. Check items received against packing list. Notify Carrier channels. of any discrepancy. Each support channel consists of 2 pieces, the smaller of 2. Refer to Fig. 4 for service area requirements. which fits inside the larger one. This allows the channel to be 3. To transfer unit from truck to storage site, refer to rigging adjusted to the required length for installation.
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NOTE: Dimensions in ( ) are in mm. DIMENSIONS (mm) DIMENSIONS (ft-in.) D D SIZE A B C E SIZE A B C E 39LA 39LB 39LC 39LA 39LB 39LC 7 3 1 11 7 3 9 03 3-1 / 3-1 / 1-9 / 1- 7 / 0-7 / 1-3 / 2- 3 / 03 952 959 540 500 200 400 700 8 4 4 16 8 4 16 3 5 3 5 7 3 9 06 3-9 / 3-9 / 2-1 / 1-11 / 0-7 / 1-3 / 2- 3 / 06 1162 1159 640 600 200 400 700 4 8 16 8 8 4 16 11 9 1 9 7 3 9 08 4-1 / 4-1 / 2-5 / 2- 3 / 0-7 / 1-3 / 2- 3 / 08 1262 1259 740 700 200 400 700 16 16 8 16 8 4 16 9 7 1 9 7 3 9 10 4-9 / 4-9 / 2-5 / 2-
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Table 1 — Physical Data UNIT SIZE 03 06 08 10 12 15 18 21 25 UNIT WEIGHTS (lb)* 39LA 200 280 411 470 540 620 695 740 820 39LB 150 210 308 352 405 465 521 555 615 39LC 170 238 349 400 459 527 590 629 697 39LD 230 322 472 540 621 713 799 851 943 39LF 230 322 472 540 621 713 799 851 943 39LG 120 168 246 282 324 372 417 444 492 39LH 220 308 452 517 594 682 764 814 902 COMPONENT WEIGHTS (lb) Mixing Box Section 139 164 193 219 226 244 283 272 311 Filter Mixing Box 150 173 208 227 245 279 327 340 395 A
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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. 6 — Unit Support Details 7
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INSTALLATION Mixing Box DAMPER ACTUATORS — The 39L mixing boxes are sup- plied 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.
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Table 3 — Recommended Actuators ROUND DAMPER AREA MAXIMUM ACCESSORY SHAFT (sq ft) MAXIMUM ACTUATOR VOLTAGE TIMING TORQUE WIRE PACKAGE VA SIZE STROKE PART NO. (50/60 Hz) (sec) (in.-lb) LENGTH NO. MIN-MAX (degrees) Parallel Opposed (ft) (in.) 33AMACTDMP133 HF27BJ035* 24 10 .750-1.050 150 44 53 133 90 300 33AMACTGV-133 HF27BJ033 24 4 .375- .625 < 150 N/A N/A 133 90 725 33AMACTGV-266 HF27BJ034 24 6 .475- .750 135 N/A N/A 266 90 450 3. Damper areas are nominal and based on low leakage type *Actuator
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11. If a second actuator is required, repeat the process for a Inlet Guide Vane (IGV) Actuators — The control second actuator. The second actuator mounts on the op- board positions the unit IGVs in order to maintain the duct stat- posite side of the fan on the opposite end of the jackshaft. ic pressure, as measured by the static pressure transducer, at the required set point. The IGV actuator is electrically connected to ACTUATOR WIRING — To wire the actuator, perform the the control board and r
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JACKSHAFT CRANKARM ANTIROTATION STRAP INSTALLED (ACTUATOR NOT SHOWN FOR CLARITY) Fig. 11 — IGV Actuator Bracket Installation IGV ACTUATOR CONNECTING ROD ANTIROTATION IGV STRAP JACKSHAFT INLET GUIDE VANES (IGV) Fig. 12 — IGV Actuator Mounting supply air; thus, condensate can form inside the junction box Install Fan Motor — For field installation of motors, be and, possibly, on the live terminal lugs. sure electrical junction box is toward the center of the unit. To prevent the moist air from migr
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When field installing or replacing sheaves, install sheaves 3. Rotating each sheave a half revolution will determine on fan shaft and motor shaft for minimum overhang. (See whether the sheave is wobbly or the drive shaft is bent. Fig. 13.) Use care when mounting sheave on fan shaft; too Correct any misalignment. much force may damage bearing. Remove rust-preventative 4. With sheaves aligned, tighten cap screws evenly and coating or oil from shaft. Make sure shaft is clean and free of progressive
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DEFLECTION FORCE — LB SMALL BELT SHEAVE Super Notch Steel Cable CROSS PD RANGE Belts Belts Belts SECTION (in.) Min Max Min Max Min Max 1 7 1 3.0- 3.6 3 4 / 3 / 5 / 34 4 8 2 1 1 1 3 3 A 3.8- 4.8 3 /2 54 /2 6 /4 3 /4 4 /4 1 7 1 1 5.0- 7.0 4 5 /2 56 /8 4 /4 5 /4 1 3 1 1 3.4- 4.2 4 5 / 5 / 84 / 5 / 2 4 2 2 1 1 1 1 3 1 B 4.4- 5.6 5 /8 7 /8 6 /2 9 /8 5 /4 7 /4 3 3 3 1 3 5.8- 8.6 6 /8 8 /4 7 /8 10 /878 /4 1 3 3 7 1 7.0- 9.4 11 / 14 / 13 / 17 / 11 / 14 4 8 4 8 4 C 1 1 1 1 1 3 9.6-16.0 14 /8 18 /2 15 /
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Note the horizontal location of the 15-degree check valve, Water and Steam Coil Piping Recommendations and the orientation of the gate/pivot. This valve is intended to GENERAL — Use straps around the coil casing or the lifting relieve any vacuum forming in the condensate outlet of a holes (see Fig. 17) to lift and place the coil. 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 i
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When a water coil is applied downstream of a direct- Variation in load on different coils in the same bank may expansion (DX) coil, a freeze-up thermostat must be installed be caused by several factors. Two of the most common between the DX and water coil and electrically interlocked to are uneven airflow distribution across the coil and stratifi- turn off the cooling to prevent freeze-up of the water coil. cation of inlet air across the coil. For outdoor-air application where intermittent chill
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NOTES: 1. A bypass is necessary around trap and valves when continu- ous 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. This is often caused by va
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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 proper- ly installed. Matching distributor connections for each coil split are on the air leaving side. See unit label or certified drawing to assu
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Table 5 — Chilled Water Coil Circuiting Data (cont) SMALL FACE AREA (39LB, 39LC, 39LF) UNIT SIZE 03 06 08 10 12 COIL Face Area (sq ft) CIRCUITING TYPE 2.72 4.72 6.58 7.95 9.23 No. Connection No. Connection No. Connection No. Connection No. Connection Circuits Size Circuits Size Circuits Size Circuits Size Circuits Size 1 1 Q 31 / 41 / —————— 2 2 1 1 1 1 1 H 61 / 81 / 10 1 / 10 1 / 10 1 / 2 2 2 2 2 4-ROW 1 1 1 1 1 F 12 1 / 16 1 / 20 2 / 20 2 / 20 2 / 2 2 2 2 2 D —— ———————— 1 1 1 1 1 H 61 / 81 /
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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-diameter- long riser should be same tube size as coil connection to ensure proper refrigerant velocity. Refer to Carrier System Design Manual, Part 3, and size re- maining suction line to compressor for a pressure drop equiva- lent to 2.0 F. This will provide a total suction line header pres- sure drop equivalent to approximately 2.5 F.
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Table 7 — Direct Expansion Coil Circuiting Data LARGE FACE AREA (39LA, 39LD) UNIT SIZE 03 06 08 10 12 CIRCUITING TYPE Qtr Half Full Qtr Half Full Qtr Half Full Qtr Half Full Half Full CFM AT 550 FPM 1996 3245 4345 5247 6149 FACE AREA (sq ft) 3.63 5.90 7.90 9.54 11.18 TUBE FACE 16 20 24 24 24 TUBE LENGTH (in.) 26.1 34.0 37.9 45.8 53.7 NUMBER OF CIRCUITS 4 8 16 — 1020 — 12 24 — 12241224 NUMBER OF TXVs 2 2 2 — 22 — 2 2 — 22 22 NUMBER OF CIRCUITS/TXV† 2 4 8 — 510 — 612 — 612612 SUCTION CONNECTIONS 7
