Carrier 39LG- Manuals

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6 Table 1 — Physical Data LEGEND *Less coil.†Coils have 14 aluminum fins per inch on copper tubes. 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 6...

7 FAN OFF TRAP CONDITION WHEN FAN STARTS FAN RUNNING AND CONDENSATE DRAINING DIFFERENTIAL 1 DRAIN NIPPLE DIFFERENTIAL 2 COOLING COILDRAIN PAN H NOTE: Lift in one piece. Use slings and spreader bars at each liftingbracket. Fig. 5 — Unit Rigging Details Fig. 7 — Condensate Drain Fig. 6 — Unit Support ...

8 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 mounti...

9 Table 3 — Recommended Actuators *Actuator is spring-return type.NOTES: 1. All actuators are direct coupled type, designed to be directly mounted into jackshaft assembly. 2. All actuators are equipped with a plenum rated cable, factory- terminated to the actuator. Part No. HF27BB035 and 034 are16 f...

11 Install Fan Motor — For field installation of motors, be sure electrical junction box is toward the center of the unit. This is necessary for drive and belts to be properly tightened. Use smallest slots in motor mounting base that will accommo- date motor and allow minimum overhang (Fig. 13). Be ...

12 When field installing or replacing sheaves, install sheaves on fan shaft and motor shaft for minimum overhang. (See Fig. 13.) Use care when mounting sheave on fan shaft; too much force may damage bearing. Remove rust-preventative coating or oil from shaft. Make sure shaft is clean and free of bur...

13 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 BeltSmall Sheave PD 5 in. Solution 1. From Fig. 15 find that deflection force for type A, super belt with 5-in. smal...

14 Water and Steam Coil Piping Recommendations GENERAL — Use straps around the coil casing or the lifting holes (see Fig. 17) to lift and place the coil. Piping practices are outlined in the Carrier System Design Manual, Part 3, Piping Design. See Tables 4-6 for circuiting data.WATER COILS — Typical...

15 When a water coil is applied downstream of a direct- expansion (DX) coil, a freeze-up thermostat must be installed between the DX and water coil and electrically interlocked to turn off the cooling to prevent freeze-up of the water coil. For outdoor-air application where intermittent chilled wate...

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-diameter- long riser should be same tube size as coil connection to ensure proper refrigerant velocity. Refer to Carrier System Design ...

20 Table 7 — Direct Expansion Coil Circuiting Data LEGEND *May be field manifolded for either face split or row split. †Where each TXV has the same number of circuits, that number is shown once. When coil has an uneven number of circuits per TXV,both values are shown. **Factory-supplied distributors...

21 Table 7 — Direct Expansion Coil Circuiting Data (cont) LEGEND *May be field manifolded for either face split or row split. †Where each TXV has the same number of circuits, that number is shown once. When coil has an uneven number of circuits per TXV,both values are shown. **Factory-supplied distr...

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 moun...

26 NOTE: All wiring must be copper and must conform to the NEC (National Electrical Code). Fig. 32 — Typical Electric Heater Wiring Schematic

27 Table 10 — Electric Heater Data LEGEND *Standard control steps are listed under the Control Step heading. “Free” additional steps of control are optionally available when the number of subcircuits exceeds the standard number of control steps. †MCA = 1.25 x FLA; for proper wire sizing, refer to Ta...

28 Table 11 — Field Wiring for Incoming Conductors Sized for 125% of Heater Load LEGEND *Values are based on Table 310-16 of the NEC (National Electrical Code) for 75 C insulated copper wire. Not more than 3 conductorsin a raceway. NOTES: 1. Be sure to consider length of wiring run and possible volt...

29 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. Note ...

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 diame- ters by using the pulley outside diameters.Then: Example: Actual Appro...

31 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. Break uni...

35 Changing Coil Hand NOTE: Electric heat coil hand cannot be changed.NOTE: The coil cover panel is not part of the coil. Remove cover panel from end of unit. New holes must be cut in coil cover panel. Original holes must be plugged and insulated. New side panels may be necessary when changing coil ...

36 STEAM INNER DISTRIBUTING TUBE COILS — Rotate in horizontal plane and reinstall. See Fig. 42.PIPING — Direct expansion, chilled water, and hot water coils should always be piped for counterflow. (Fluid should enter the coil at the leaving-air side.) Steam coils must have the condensate connection ...

37 Table 12 — Filter Data *Only 2-in. filters are available on size 03. 39L UNIT SIZE 03 06 08 10 12 15 18 21 25 Angle Filter Section Filter Qty…Size (in.) 2…16x25 4…16x20 2…16x202…16x25 4…16x25 6…16x20 9…16x20 12…16x20 4…16x208…16x25 4…16x208…16x25 Nominal Face Area (sq ft) 5.56 8.89 10.00 11.11 13...

38 10. Check fan shaft diameter at bearing mount. If worn by more than .001 in. below nominal, shaft should be re- placed. 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 install...