Carrier 50ZH Series Product Data

Carrier 50ZH Series Product Data

3-phase single-packaged 2-1/2 to 5 tons

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50ZH
3-PHASE SINGLE-PACKAGED HEAT PUMPS
2-1/2 to 5 Tons

Product Data

UNIT 50ZH
Single-Packaged Heat Pump Units with:
• easy installation design
• corrosion-proof unit base
• redesigned aerodynamic fan blade for
reduced sound
• sloped drain for improved indoor air
quality
• scroll compressors
• through-the-top service access
• louvered panel coil protection
Features/Benefits
Compact, horizontal supply and return
unit, combining easy installation and
maintenance with efficient performance.
EASY TO INSTALL — The 50ZH
units are lightweight, compact single-
package units that are easy to handle.
Every 50ZH unit has an identical 32 by
51-in. footprint to make jobsite planning
simple. The precise design uses less
sheet metal and makes the 50ZH units
lighter than other units. The unit can be
easily positioned on the jobsite with the
hand-holds built into the unit basepan.
Drop-in cartridge style heaters are
utilized to minimize installation time.
REDESIGNED AERODYNAMIC
FAN BLADE DESIGN reduces overall
sound by up to 3dB; now as low as 76dB.
TOP COVER SERVICE ACCESS —
The 50ZH units are designed to be
serviced from the top. The split-top
design allows easy access for installation
and maintenance procedures on the unit.
Routine maintenance tasks such as coil
cleaning are sped up with through-the-
top access. Multiple side panels do not
need to be removed as with other units.
CORROSION PROOF UNIT
BASE— The 50ZH unit features a
tough, high-tech, single-piece,
composite material unit base with an
integrated drain. The composite material
eliminates the potential problem of rust
and premature replacement which are
common with standard metal pans. Each
50ZH unit base is sloped to eliminate
standing water. This feature minimizes

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Summary of Contents for Carrier 50ZH Series

  • Page 1: Features/Benefits

    EASY TO INSTALL — The 50ZH units are lightweight, compact single- package units that are easy to handle. Every 50ZH unit has an identical 32 by 51-in. footprint to make jobsite planning simple. The precise design uses less sheet metal and makes the 50ZH units lighter than other units.
  • Page 2: Table Of Contents

    CHRONOTEMP™ DEFROST ductwork. resistant finish of the 50ZH unit will SYSTEM — The system provides time/ DEPENDABLE COMPONENTS — keep it looking like new for years. A temperature-based defrost cycles to...
  • Page 3: Ari Capacities

    * Air Conditioning & Refrigeration Institute. ® † Rated in accordance with U.S. Government DOE (Department of Energy) test procedures and/or ARI Standard 210/240-89. ** Rated in accordance with ARI Standard 270-84. Physical data UNIT SIZE 50ZH OPERATING WEIGHT (lb) COMPRESSOR TYPE Scroll REFRIGERANT R-22...
  • Page 4: Accessories

    Accessories Corporate Thermostat provides heating and cooling unit control. The ACCESSORY thermostat provides system and fan switching. MotorMaster II® Low Ambient Control allows unit to run at outdoor temperatures down to 0°F. Electric Heaters provide heat in the unit when required. Each package has a heater module that slides into keyed mounting slots in the fan inlet.
  • Page 5 FACTOR V/3/60 = 11.25 capacity at 208 v 0.69 0.75 0.92 1.00 0.84 0.92 1.00 ODS — Order Distribution System Balance Point Worksheet 80000 70000 60000 50000 40000 30000 20000 10000 Outdoor Air Temp (Deg F) 50ZH Balance Point Worksheet...
  • Page 6: Base Unit Dimensions

    Base unit dimensions—50ZH030 REQUIRED CLEARANCE TO COMBUSTIBLE MA TL. INCHES [mm] TOP OF UNIT ..................0 DUCT SIDE OF UNIT................0 SIDE OPPOSITE DUCTS ..............0 BOTTOM OF UNIT .................0 NEC. REQUIRED CLEARANCES. INCHES [mm] BETWEEN UNITS, POWER ENTRY SIDE ........42.00 [1066.8] UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0] UNIT AND BLOCK OR CONCRETE WALLS AND OTHER GROUNDED SURFACES, POWER ENTRY SIDE......42.00 [1066.8] REQUIRED CLEARANCE FOR OPERATION AND SERVICING...
  • Page 7 Base unit dimensions—50ZH036-048 REQUIRED CLEARANCE TO COMBUSTIBLE MA TL. INCHES [mm] TOP OF UNIT ..................0 DUCT SIDE OF UNIT................0 SIDE OPPOSITE DUCTS ..............0 BOTTOM OF UNIT .................0 NEC. REQUIRED CLEARANCES. INCHES [mm] BETWEEN UNITS, POWER ENTRY SIDE ........42.00 [1066.8] UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0] UNIT AND BLOCK OR CONCRETE WALLS AND OTHER GROUNDED SURFACES, POWER ENTRY SIDE......42.00 [1066.8] REQUIRED CLEARANCE FOR OPERATION AND SERVICING...
  • Page 8 Base unit dimensions—50ZH060 REQUIRED CLEARANCE TO COMBUSTIBLE MA TL. INCHES [mm] TOP OF UNIT ..................0 DUCT SIDE OF UNIT................0 SIDE OPPOSITE DUCTS ..............0 BOTTOM OF UNIT .................0 NEC. REQUIRED CLEARANCES. INCHES [mm] BETWEEN UNITS, POWER ENTRY SIDE ........42.00 [1066.8] UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0] UNIT AND BLOCK OR CONCRETE WALLS AND OTHER GROUNDED SURFACES, POWER ENTRY SIDE......42.00 [1066.8] REQUIRED CLEARANCE FOR OPERATION AND SERVICING...
  • Page 9: Selection Procedure

    Selection Procedure I DETERMINE COOLING AND HEATING Determine additional electric heat capacity in kW. REQUIREMENTS AT DESIGN CONDITIONS: Given: 13,050 Btuh = 3.8 kW of heat required Required Cooling Capacity (TC) ..28,000 Btuh 3414 Btuh/kW Sensible Heat Capacity (SHC) .
  • Page 10: Performance Data

    Performance data COOLING CAPACITY 50ZH030 (2-1/2 TONS) Indoor Entering Air—CFM/BF Temp (F) 875/0.10 1000/0.11 1125/0.12 Air Ent Outdoor Indoor Entering Air — Ewb (F) coil (edb) 31.6 29.2 27.1 26.4 32.2 29.6 27.5 26.9 31.9 29.9 27.8 27.2 15.0 19.8 19.5 23.9 15.7...
  • Page 11: Cooling Capacity

    Performance data (cont) COOLING CAPACITY 50ZH036 (3 TONS) Evaporator Air—CFM/BF Temp (F) 1050/0.09 1200/0.11 1350/0.12 Air Ent Outdoor Evaporator Air — Ewb (F) coil (edb) 39.9 35.8 33.1 32.3 40.5 36.4 33.7 32.9 40.9 36.8 34.0 33.3 19.1 24.2 23.4 29.0 19.9 25.7...
  • Page 12 Performance data (cont) COOLING CAPACITY 50ZH042 (3-1/2 TONS) Indoor Entering — CFM/BF Temp (F) 1225/0.11 1400/0.13 1575/0.14 Air Ent Outdoor Indoor Entering — Ewb (F) coil (edb) 45.9 41.1 38.0 37.0 46.6 41.8 38.6 37.6 47.2 42.3 39.1 38.2 22.1 28.0 27.1 33.5...
  • Page 13 Performance data (cont) COOLING CAPACITY 50ZH048 (4 TONS) Indoor Entering—CFM/BF Temp (F) 1400/0.04 1600/0.05 1800/0.06 Air Ent Outdoor Indoor Entering Air — Ewb (F) coil (edb) 46.5 44.8 43.3 42.9 46.2 44.5 43.2 42.9 45.5 43.9 43.0 42.8 23.8 32.1 31.9 40.4 23.9...
  • Page 14 Performance data (cont) COOLING CAPACITY 50ZH060 (5 TONS) Evaporator Air—CFM/BF Temp (F) 1750/0.08 2000/0.08 2250/0.09 Air Ent Outdoor Evaporator Air — Ewb (F) coil (edb) 65.7 59.9 55.5 54.4 66.4 60.8 56.5 55.7 67.3 61.7 57.4 57.4 33.7 43.4 50.8 52.5 35.2 46.5...
  • Page 15 1. Direct interpolation is permissible. Do not extrapolate. 2. The following formulas may be used: sensible capacity (Btuh) – 1.10 x cfm WET COIL PRESSURE DROP UNIT SIZE AIRFLOW PRESSURE DROP 50ZH (cfm) (in. wg) 0.06 1000 0.06 1200 0.08 1000 0.04...
  • Page 16 Performance data (cont) DRY COIL AIR DELIVERY* — HORIZONTAL DISCHARGE (Deduct 10% for 208 Volt Operation) 230 AND 460 VOLT HORIZONTAL DISCHARGE External Static Pressure (in.wg) Unit Motor 50ZH Speed Delivery Watts — — — — Watts — — 1131...
  • Page 17: Electrical Data

    Electrical data VOLTAGE UNIT COMPRESSOR RANGE ELECTRIC HEAT POWER SUPPLY SIZE NOMINAL 50ZH V-PH-Hz TYPE MAX FUSE (–SERIES) Nominal kW* OR CKT. BKR. MOCP —/— —/— 16.8/16.8 20/20 — 3.8/5.0 10.5/12.0 29.9/31.8 30/35 — 208/230-3-60 10.0 63.0 7.5/10.0 20.8/24.1 42.8/46.9 45/50 —...
  • Page 18: Typical Wiring Schematics

    Typical wiring schematic — 208/230-3-60...
  • Page 19 Typical wiring schematic — 460-3-60...
  • Page 20: Typical Wiring Schematics

    Typical wiring schematic (cont) BRN (COMMON) VIO (STEP 2) WHT ( STEP 1) CONTACTOR 2 UNIT POWER WIRING FUSE BLOCK CONTACTOR 1 AUTO-LIMIT EL 1 EL 2 EL 3 Electric Heater Wiring EXAMPLE: Supply voltage is 460-3-60. AB = 452 v LEGEND BC = 464 v AC = 455 v...
  • Page 21: Controls

    Controls Sequence of operation When compressor time delay (5 ± 2 minutes) is completed, a circuit is made to C, starting COMP and OFM. Circuit R- When power is supplied to unit, the transformer (TRAN) is G also is completed, energizing IFR and starting IFM after a energized.
  • Page 22: Guide Specifications

    1. Indoor and outdoor coils shall have aluminum-plate fins (HEATING) mechanically bonded to seamless copper tubes with all joints brazed. MODEL NUMBER: 50ZH 2. Tube sheet openings shall be bellied to prevent tube PART I - GENERAL wear. 1.01 SYSTEM DESCRIPTION 3.
  • Page 23: Options

    Guide specifications (cont) 2. All fan motors shall have permanently lubricated bear- Curbs shall have seal strip and a wood nailer for flash- ings and inherent automatic-reset thermal overload ing and shall be installed per manufacturer’s instruc- protection. tions. 3. Outdoor-fan motor shall be totally enclosed. 4.
  • Page 24 Copyright 2006 Carrier Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 Printed in U.S.A. edition date: 3/06 Manufacturer reserves the right to change, at any time, specifications or designs without notice and obligations Catalog No: 50ZH-5PD Replaces: 50ZH-4PD...

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