Carrier 50ZH Product Data
Single-package units 2 to 5 nominal tons
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Also See for 50ZH:
- Installation, start-up and service instructions manual (25 pages) ,
- Product data (24 pages) ,
- Manual to operating and maintaining (8 pages)
Table of Contents
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Copyright 1998 Carrier Corporation
Product
Data
50ZH
Single-Package
Heat Pump Units
2 to 5 Nominal Tons
Single-Package Heat Pump Units
with:
• easy installation design
• corrosion-proof basepan
• sloped drain pan for improved
indoor air quality
• scroll compressors
• through-the-top service access
• louvered panel coil protection
Features/Benefits
Compact, horizontal supply
and return unit, combin-
ing easy installation and
maintenance with efficient
performance.
Easy to install
The 50ZH units are light weight, com-
pact 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 eas-
ily positioned on the jobsite with the
hand-holds built into the unit basepan.
Drop-in cartridge style heaters are
utilized to minimize installation time.
Top cover service access
The 50ZH units are designed to be
serviced from the top. The split-top
design allows easy access for installa-
tion 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 re-
moved as with other units.
Form 50ZH-2PD
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Summary of Contents for Carrier 50ZH
-
Page 1: Features/Benefits
Easy to install The 50ZH units are light weight, com- pact 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... -
Page 2: Table Of Contents
Each scroll compressor is the 50ZH units. Each heater is a Corrosion proof basepan hermetically sealed against contami- drop-in style cartridge type with single- The 50ZH features a tough, high- nation to help promote longer life and point electrical connections for both tech, single-piece, composite material dependable operation. -
Page 3: Ari Capacities
*Air Conditioning and 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 50ZH OPERATING WEIGHT (lb) COMPRESSOR TYPE Scroll REFRIGERANT R-22... -
Page 4: Accessories
Accessories Electric heaters provide heat in the unit when required. ACCESSORY Each package has a heater module that slides into keyed Outdoor Thermostat mounting slots in the fan inlet. Heater sizes range from 5.0 Thermostat and Subbase to 20.0 kW. The electric heater design allows the use of a Electronic Programmable Thermostat single-point power supply for the entire unit, resulting in Electric Heat with Single-Point Kit (5.0 to 20.0 kW) - Page 5 Base unit dimensions — 50ZH024,030 REQUIRED CLEARANCES TO COMBUSTIBLE MAT’L Millimeters (in.) Top of Unit ........0 Duct Side of Unit .
- Page 6 Base unit dimensions — 50ZH036-048 REQUIRED CLEARANCES TO COMBUSTIBLE MAT’L Millimeters (in.) Top of Unit ........0 Duct Side of Unit .
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Page 7: Base Unit Dimensions
Base unit dimensions — 50ZH060 REQUIRED CLEARANCES TO COMBUSTIBLE MAT’L Millimeters (in.) Top of Unit ........0 Bottom of Unit . -
Page 8: Selection Procedure
Selection procedure I Determine cooling and heating requirements at Determine additional electric heat capacity in kW. design conditions. 13,050 Btuh Given: = 3.8 kW of heat required 3414 Btuh/kW Required Cooling Capacity (TC) ..28,000 Btuh Sensible Heat Capacity (SHC) . -
Page 9: Performance Data
Performance data COOLING CAPACITIES 50ZH024 (2 TONS) Indoor Entering Air — CFM/BF Temp (F) Air Ent 700/0.12 800/0.14 900/0.15 Outdoor Indoor Entering Air — Ewb (F) Coil (edb) 26.6 24.1 22.2 22.0 27.0 24.5 22.6 22.4 27.3 24.9 23.0 22.8 13.2 16.7 16.2... - Page 10 Performance data (cont) COOLING CAPACITIES (cont) 50ZH036 (3 TONS) Indoor Entering Air — CFM/BF Temp (F) Air Ent 1050/0.09 1200/0.11 1350/0.12 Outdoor Indoor Entering 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...
- Page 11 COOLING CAPACITIES (cont) 50ZH048 (4 TONS) Indoor Entering Air — CFM/BF Temp (F) Air Ent 1400/0.08 1600/0.08 1800/0.09 Outdoor Indoor Entering Air — Ewb (F) Coil (edb) 57.4 52.5 43.8 41.2 57.7 53.0 44.4 42.6 58.2 53.7 45.0 44.5 27.1 34.7 31.7 40.1...
- Page 12 Performance data (cont) HEATING CAPACITIES 50ZH024 Temp (F) Temperature Air Entering Outdoor Coil (F db at 70% rh) Air Ent Indoor Indoor Air CFM Coil (Std) −10 (edb) Cap. 7.81 7.18 9.70 8.93 11.8 10.9 13.5 12.3 14.3 13.0 16.8 14.7 19.6 19.6 21.9 21.9 22.7...
- Page 13 HEATING CAPACITIES (cont) 50ZH036 Temp (F) Temperature Air Entering Outdoor Coil (F db at 70% rh) Air Ent Indoor Indoor Air CFM Coil (Std) −10 (edb) Cap. 11.4 10.5 14.4 13.2 17.6 16.2 20.1 18.3 21.2 19.2 25.3 22.2 30.1 30.1 34.0 34.0 35.4 35.4 41.9...
- Page 14 Performance data (cont) HEATING CAPACITIES (cont) 50ZH048 Temp (F) Temperature Air Entering Outdoor Coil (F db at 70% rh) Air Ent Indoor Indoor Air CFM Coil (Std) −10 (edb) Cap. 15.4 14.2 18.9 17.3 22.8 20.9 26.0 23.7 27.6 25.0 33.1 29.0 39.6 39.6 45.3 45.3 47.2...
- Page 15 WET COIL PRESSURE DROP MULTIPLICATION FACTORS UNIT SIZE AIRFLOW PRESSURE DROP VOLTAGE HEATER kW MULTIPLICATION 50ZH (cfm) (in. wg) DISTRIBUTION RATING FACTOR V/3/60 0.02 0.69 0.05 0.75 0.06 0.92 1.00 0.07 0.84 0.06 0.92 1000 0.06 1.00 1200 0.08 Example: 15.0 kW (at 240 v) heater on 208 v 1000 0.04...
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Page 16: Performance Data
Performance data (cont) DRY COIL AIR DELIVERY* — HORIZONTAL DISCHARGE (Deduct 10% for 208 Volt Operation) 230 AND 460 VOLT HORIZONTAL DISCHARGE UNIT MOTOR External Static Pressure (in. wg) 50ZH SPEED DELIVERY Watts — — — — Watts — —... -
Page 17: Electrical Data
Electrical data VOLTAGE ELECTRIC POWER DISCONNECT COMPRESSOR RANGE HEAT SUPPLY SIZE UNIT NOMINAL HEATER 50ZH V-PH-Hz TYPE PACKAGE NO. Nominal MOCP None — — 19.3/ 19.3 25/ 25† 19/ 19 70/ 70 208/230-1-60 12.8 63.0 CPHEATER026A00 3.8/ 5.0 18.3/20.8 42.2/ 45.3 45/ 50†... -
Page 18: Typical Wiring Schematic
Typical wiring schematic NOTES: 1. If any of the original wire furnished must be replaced, it must be replaced with type 90° C wire or its equivalent. 2. Thermostat: HH07AT171 Subbase: HH92AZ188 3. Set heat anticipator at .6. 4. Use 75 deg. C copper conductors only. LEGEND —... -
Page 19: Controls
Typical wiring schematic (cont) ELECTRIC HEATER WIRING Controls Sequence of operation When compressor time delay (5 ± 2 minutes) is com- pleted, a circuit is made to C, starting COMP and OFM. When power is supplied to unit, the transformer (TRAN) is Circuit R-G also is completed, energizing IFR and starting energized. -
Page 20: Typical Piping And Wiring
Typical piping and wiring HORIZONTAL DISCHARGE INDOOR THERMOSTAT RETURN FROM POWER SOURCE COVER POWER AND LOW-VOLTAGE ENTRY DISCONNECT COMPOSITE PER NEC* RUST-PROOF (UNIT AND BASE PAN ELECTRIC HEATER) CONDENSATE DRAIN CONNECTION FIELD-SUPPLIED PAD LEGEND Power Wiring Control Wiring Outdoor Airflow Indoor Airflow *Separate disconnect per NEC (National Electrical Code) required for electric heater when single-point connection is not used. -
Page 21: Guide Specifications
Size Range: 2 to 5 Tons, Nominal (Cooling) 21,000 to 52,500 Btuh, Nominal D. Compressor: (Heating) Fully hermetic scroll, type with internal and external Carrier Model Number: 50ZH vibration isolation. Part 1 — General E. Coils: 1.01 SYSTEM DESCRIPTION 1. Indoor and outdoor coils shall have aluminum- plate fins mechanically bonded to seamless cop-... -
Page 22: Guide Specifications
Guide specifications (cont) I. Electrical Requirements: c. Each heater assembly shall include the fol- lowing safety features: All unit power wiring shall enter unit cabinet at a single 1) Automatic-reset switches. location. 2) Heat limiters for primary and secondary, J. Motors: overcurrent, and thermal protection. - Page 24 Carrier Corporation • Syracuse, New York 13221 6-98 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 Page 24 Catalog No. 525-095 Printed in U.S.A. PC 111...
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