Carrier 48HG014-028 User Manual

Copyright 2003 Carrier Corporation Form 48/50HG-3PDUltra High Performance, Single Package Rooftop Units with:• Cooling EERs up to 11.6• IPLV’s up to 1

10LEGENDUNIT 50HG 014 016 020VOLTAGE208/230and 460575208/230and 460575208/230and 460575NOMINAL CAPACITY (Tons)13 13 15 15 17.5 17.5OPERATING WEIGHT (l

11LEGENDUNIT 50HG 024 028VOLTAGE208/230and 460575 ALLNOMINAL CAPACITY (Tons)20 20 25OPERATING WEIGHT (lb)50 SERIES (Cooling Only)2187 2187 2446COMPRES

12*Factory-installed. †Field-installed.NOTE: Refer to 48/50HG price pages or contact your local representative for accessoryand option package informa

13Base unit dimensions — 48HG014-028

14Base unit dimensions — 50HG014-028

15Accessory dimensionsROOF CURB — FULL PERIMETER CURB

16Accessory dimensions (cont)1’-7 7/8” (505)1’-0 7/16”(316)1’-4 5/16”(415)6 1/8” (155)2 1/8” (53)1’-3” (381)7/8-IN. K.O.3-IN. K.O.EXISTING APPLICATION

17I Determine cooling and heating requirementsat design conditions.Given:Required Gross CoolingCapacity (TC) . . . . . . . . . . . . . . .229,000 Btu

18I Determine cooling and heating requirementsat design conditions.Given:Required Gross CoolingCapacity (TC) . . . . . . . . . . . . . . .168,000 Btu

19COOLING CAPACITIESSee Legend and Notes on page 21.48/50HG014 (13 Tons)TemperatureAir EnteringCondenser(Edb) (F)Evaporator Air Quantity — Cfm/BF3750/

2Every compact one-piece unit arrives fully assembled, charged, tested, and ready to run.Cooling EERsThe 48/50HG014 (13 tons) units pro-vide ARI (Air

20COOLING CAPACITIES (cont)48/50HG020 (171/2 Tons)TemperatureAir EnteringCondenser(Edb) (F)Evaporator Air Quantity — Cfm/BF5400/0.03 6300/0.04 7200/0.

21COOLING CAPACITIES (cont) LEGEND AND NOTES FOR COOLING CAPACITY TABLESLEGENDNOTES:1. Direct interpolation is permissible. Do not extrapolate.2. The

22FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return)LEGEND*For standard motor with standard drive, the drive range is 485 to613 rpm (208/23

23FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 485 to613 rpm

24FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 618 to789 rpm

25FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 618 to789 rpm

26FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 658 to808 rpm.

27FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 658 to808 rpm.

28FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 658 to808 rpm.

29FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 658 to808 rpm.

3Durable, dependable constructionDesigned for durability in any climate, the weather-resistant cabinets are con-structed of galvanized ste

30FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 799 to965 rpm.

31FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 799 to965 rpm.

32FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 485 to613 rpm

33FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 618 to789 rpm

34FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 658 to808 rpm.

35FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 658 to808 rpm.

36FAN PERFORMANCE — 48/50HG014-028 (Vertical Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 799 to965 rpm.

37FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return)LEGEND*For standard motor with standard drive, the drive range is 485 to613 rpm (208/

38FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 485 to613 rp

39FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 618 to789 rp

4switch also deenergizes the gas valve in the event of a flame rollout.ComfortLink™ controlThe ComfortLink control is your link to a world of simple a

40FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 618 to789 rp

41FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 658 to808 rp

42FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 658 to808 rp

43FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 658 to808 rp

44FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 658 to808 rp

45FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 799 to965 rp

46FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 799 to965 rp

47FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 485 to613 rp

48FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 618 to789 rp

49FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 658 to808 rp

5LEGEND*Air Conditioning and Refrigeration Institute.†IPLV values are calculated based on control configuration T.CTL = 2(2 Stage Y1).**Size 028 unit

50FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 658 to808 rp

51FAN PERFORMANCE — 48/50HG014-028 (Horizontal Supply and Return) (cont)LEGEND*For standard motor with standard drive, the drive range is 799 to965 rp

52POWER EXHAUST FAN PERFORMANCE — 48/50HG014-028LEGENDESP — External Static PressureALTITUDE COMPENSATION* — 48HG014-028(Natural Gas)*As the height ab

53ACCESSORY/FIOP ELECTRIC HEAT STATIC PRESSURE (in. wg) — 50HG014-028 UNITS LEGENDNOTES:1. Heaters are rated at 240 v, 480 v, and 600 v

54FAN RPM AT MOTOR PULLEY SETTINGS**Approximate Rpm shown.EVAPORATOR FAN MOTOR SPECIFICATIONSLEGENDBkW — Brake kilowatts48/50HG MOTOR AND DRIVETURNS O

5548HG014-028 WITHOUT OPTIONAL CONVENIENCE OUTLETSee Legend and Notes on page 57.UNITSIZE48HGNOMINAL VOLTAG E (3 Ph, 60 Hz)VOLTAGERANGECOMPRESSOROFM I

5648HG014-028 WITH OPTIONAL CONVENIENCE OUTLETSee Legend and Notes on page 57.UNITSIZE48HGNOMINAL VOLTAGE (3 Ph, 60 Hz)VO LTAG ERANGECOMPRESSOROFM IFM

5750HG014-028 WITHOUT OPTIONAL CONVENIENCE OUTLETLEGEND AND NOTES FOR ELECTRICAL DATA TABLESLEGEND*Fuse or HACR circuit breaker.†208/230 v 75-kW Elect

5850HG014-028 UNITS WITHOUT OPTIONAL CONVENIENCE OUTLET (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240 75-kW ELECTRIC HEATFEEDER CIRCUIT FOR 208/230 U

5950HG014-028 UNITS WITHOUT OPTIONAL CONVENIENCE OUTLET (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240 75-kW ELECTRIC HEATFEEDER CIRCUIT FOR 208/230 U

6VERTICAL SUPPLY UNITS WITH FIELD-INSTALLED LIQUID PROPANE KIT*All units are 2-stage heat.†Minimum heating cfm must be maintained to ensure proper hea

6050HG014-028 UNITS WITHOUT OPTIONAL CONVENIENCE OUTLET (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240 75-kW ELECTRIC HEATFEEDER CIRCUIT FOR 208/230 U

6150HG014-028 UNITS WITHOUT OPTIONAL CONVENIENCE OUTLET (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240 75-kW ELECTRIC HEATFEEDER CIRCUIT FOR 208/230 U

6250HG014-028 UNITS WITH OPTIONAL CONVENIENCE OUTLETSee Legend and Notes on page 57.UNITSIZE50HGNOMINAL VOLTAGE (3 Ph, 60 Hz)VO LTAG ERANGECOMPRESSORO

6350HG014-028 UNITS WITH OPTIONAL CONVENIENCE OUTLET (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240 75-kW ELECTRIC HEATFEEDER CIRCUIT FOR 208/230 UNIT

6450HG014-028 UNITS WITH OPTIONAL CONVENIENCE OUTLET (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240 75-kW ELECTRIC HEATFEEDER CIRCUIT FOR 208/230 UNIT

6550HG014-028 UNITS WITH OPTIONAL CONVENIENCE OUTLET (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240 75-kW ELECTRIC HEATFEEDER CIRCUIT FOR 208/230 UNIT

6650HG014-028 UNITS WITH OPTIONAL CONVENIENCE OUTLET (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240 75-kW ELECTRIC HEATFEEDER CIRCUIT FOR 208/230 UNIT

67Typical wiring schematicLOW VOLTAGE CONTROL SCHEMATIC — 48HG

68Typical wiring schematic (cont)LOW VOLTAGE CONTROL SCHEMATIC — 50HG

69POWER SCHEMATIC — 48/50HG

7OPERATION AIR QUANTITY LIMITS*7000 cfm recommended for operation above 1.0 in. wg external static pressure.MULTIPLICATION FACTORSNOTE: The following

70Typical wiring schematic (cont)FIOPSSMOKE DETECTOR WIRING

71Typical component arrangement---.A —Circuit AAUX —Auxiliary Contact---.B —Circuit B---.C —Circuit CC —Compressor, ContactorCAP —CapacitorCB —Circuit

72Operating sequenceHeating48HG UnitsNOTE: The 48HG units have 2 stages of gas heat.When the thermostat calls for heating, power is sent to Won the IG

73If the indoor fan is not operating, the economizer will beclosed.The 48/50HG units can also be equipped with optionalCO2 sensors for additional indo

74DuctworkDuctwork should be attached to the curb on all units. Inte-rior installation may proceed before unit is set in place onroof. If ductwork wil

75Indoor air qualityAn indoor air quality sensor, which senses CO2, is afactory-installed option. The sensor in conjunction with theeconomizer is used

76Packaged Rooftop Electric CoolingUnit with Gas or Electric Heat —Constant Volume ApplicationHVAC Guide SpecificationsSize Range:13 to 25 Tons, Nomin

773. Induced-draft blower shall be of the direct-driven, single inlet, forward-curved, centrifugaltype. It shall be made from steel with acorrosion-re

78c. Unit control with standard suction pressuretransducers and condensing temperaturethermistors.d. Shall provide a 5 F temperature differencebetween

79* 3. Barometric Relief Damper Package:a. Package shall include damper, seals, hard-ware, and hoods to relieve excess internalpressure.b. Damper shal

8LEGENDUNIT 48HG 014 016 020VOLTAG E208/230 and 460575208/230 and 460575208/230 and 460575NOMINAL CAPACITY (Tons)13 13 15 15 17.5 17.5OPERATING WEIGHT

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

9LEGENDUNIT 48HG 024 028VOLTAG E208/230 and 460575 ALLNOMINAL CAPACITY (Tons)20 20 25OPERATING WEIGHT (lb)48 SERIES (Low Heat)2272 2272 2526COMPRESSOR