Carrier 50JZ 024-060 Cooling Mode, Heat Pump Heating, GAS Heat Mode, Automatic CHANGE-OVER

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(2.) COOLING MODE—

Press MODE button on the Thermidistat™ until COOL icon is displayed. Cooling begins within 10 sec. and remains on for 4 minutes. Observe that compressor, outdoor fan and indoor blower motors start after the call for Cooling. At the end of 4 minutes, the cooling cycle stops and the MODE reverts back to OFF. The Indoor Blower continues to run for the time selected on the Easy Select™ board after OFF icon is displayed.

(3.) HEAT PUMP HEATING—

Press MODE button on the Thermidistat™ until HEAT icon is displayed. Heat pump heating begins within 10 sec. and remains on for 4 minutes. Observe that the compres- sor, outdoor fan and indoor blower come on. At the end of the 4 minutes, heating cycle stops and the MODE reverts back to OFF. The indoor blower continues to run for the time selected on the Easy Select™ Board after the OFF icon is displayed. Heating maybe turned off anytime during the 4 minute cycle by pressing MODE button until OFF is displayed.

(4.) GAS HEAT MODE—

Press MODE button until E-HEAT(Emergency Heat or Back-Up Heat) icon is displayed. Gas heating begins within 10 sec. and remains on for 4 minutes. The induced draft motor should start immediately. The burners should light within 5 sec. of E-HEATcall. The indoor blower will turn on 45 sec. after the flame has been established. Gas heating stops at the end of 4 minutes and MODE reverts back to OFF. The indoor blower continues to run for the time selected on the Easy Select™ Board after the OFF icon is displayed.

NOTE: If the burners do not light, this lighting sequence is repeated for 15 minutes from the initial call for E-HEAT.If after 15 minutes the burners do not light, there will be a lockout. To reset the burner lockout control, break the 24-v. power to “W”.

(5.) AUTOMATIC CHANGE-OVER—

To test AUTO CHANGE-OVERfunction between COOL and HEAT:

Enable the AUTO CHANGE-OVERmode during Thermi- distat™ set-up. Refer to the Thermidistat™ literature for details. Observe that the unit operates in cooling when in COOL MODE (when setting is below room temperature) and HEAT MODE (when setting is above room tempera- ture).

AIRFLOW AND TEMPERATURE RISE-The heating section for each size unit is designed and approved for heating operation within the temperature rise range stamped on the unit rating plate. Table 15 shows the approved temperature rise range for each heating input, and the air delivery (CFM) at various temperature rise ranges.

The heating operation airflow must produce a temperature rise that falls with in the approved range.

Refer to Indoor Airflow and Airflow Tables on the following pages to adjust heating airflow when required.

Step 3—50GL: Start-Up (ICM FIOP)

CHECKING COOLING CONTROL OPERATION–Start and check the unit for proper cooling control operation as follows:

(1.) Place room thermostat SYSTEM switch in OFF position. Observe that blower motor starts when FAN switch is placed in ON position and shuts down when FAN switch is placed in AUTO position.

(2.) Place SYSTEM switch in COOL position and FAN switch in AUTO position. Set cooling control below room tem-

perature. Observe that compressor, condenser fan, and evaporator blower motors start. Observe that cooling cycle shuts down when control setting is satisfied. The evapo- rator fan will continue to run for the selected off delay.

(3.) When using an auto-changeover room thermostat, place both SYSTEM and FAN switches in AUTO positions. Observe that unit operates in heating mode when tempera- ture control is set to ‘‘call for heating’’ (above room temperature) and operates in cooling mode when tempera- ture control is set to ‘‘call for cooling’’ (below room temperature).

NOTE: Once the compressor has started and then has stopped, it will not start again until 5 minutes have elapsed. (The cooling cycle remains ‘‘on’’ until the room temperature drops to point that is slightly below the cooling control setting of the room thermostat. At this point, the thermostat ‘‘breaks’’ the circuit between ther- mostat terminal R to terminals Y and G.) These open circuits de-energize contactor coil C and ICM board. The condenser and compressor motors stop. After the time delay setting selected on the Easy Select™ board (See Easy Select Section) , the blower motor stops. The unit is in a ‘‘standby’’ condition, waiting for the next ‘‘call for cooling’’ from the room thermostat.

Step 4—50JZ: Start-Up (ICM FIOP)

CHECKING COOLING AND HEATING CONTROL OPERA- TION– Start and check the unit for proper control operation as follows:

(1.) Place room thermostat SYSTEM switch or MODE control in OFF position. Observe that blower motor starts when FAN mode is placed in FAN ON position and shuts down according to time delay selected on the Easy Select™ board (See Easy Select Section) when FAN MODE switch is placed in AUTO position.

(2.) Thermostat:

When the room temperature rises to a point that is slightly above the cooling control setting of the thermostat, the thermostat completes the circuit between thermostat ter- minal R to terminals Y, O and G. These completed circuits through the thermostat connect contactor coil (C) (through unit wire Y) and ICM board (through unit wire G) across the 24-v. secondary of transformer (TRAN).

Thermidistat™ or Thermostat and Humidistat:

When the room temperature rises to a point that is slightly above the cooling control setting of the thermostat, the thermostat completes the circuit between thermostat ter- minal R to terminals Y, O, DH, and G. These completed circuits through the thermostat connect contactor coil (C) (through unit wire Y) and ICM board (though unit wire G) across the 24-v. secondary of transformer (TRANS).

(3.) Place system switch or MODE control in HEAT position. Set control above room temperature. Observe that com- pressor, outdoor fan, and indoor blower motors start. Observe that heating cycle shuts down according to time delay selected on the Easy Select™ board (See Easy Select Section) when control setting is satisfied.

(4.) When using an automatic changeover room thermostat, place both SYSTEM or MODE control and FAN mode switches in AUTO positions. Observe that unit operates in Cooling mode when temperature control is set to “call for Cooling” (below room temperature), and unit operates in Heating mode when temperature control is set to “call for Heating” (above room temperature).

NOTE: Once the compressor has started and then has stopped, it should not be started again until 5 minutes have elapsed. The

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Contents Installation, Start-Up, and Operating Instructions Standard Connection Special Procedures for 208-V OperationEasy SELECT-48GP Control Voltage ConnectionsHigh Airflow Time Delay ProfileWhen Thermostat is SET on Continuous FAN 48GP Sequence of Operation Accessory InstallationAIR Conditioner Select Options Easy SELECT-48JZHumidifier Wiring-48JZ Easy SELECT-50GL & 50JZ 48JZ Sequence of OperationTion Page 50GL & 50JZ Sequence of Operation Humidifier Wiring for 50GL & 50JZFAN Operation ICM Fiop START-UPAutomatic CHANGE-OVER Cooling ModeGAS Heat Mode Heat Pump HeatingICM Fiop Physical Data-Unit 48GP Size 48GP LOSS-OF-CHARGE/LOW-PRESSURE Switch48GP with ICM Fiop Electrical Data ICM Fiop Electric Schematic-Unit 48GP Indoor Blower ICM Fiop Physical Data-Unit 48JZOutdoor Coil Indoor Coil48JZ with ICM Fiop Electrical Data ICM Fiop Electric Schematic-Unit 48JZ ICM Fiop Physical Data-Unit 50GL Range Motor Heat Power Supply Size 50GL50GL with ICM Fiop Electrical Data ICM Fiop Electrical Schematic-50GL Refrigerant ICM Fiop Physical Data-Unit 50JZCompressor Quantity Type 50JZ with ICM Fiop Electrical Data Range Motor Heat Power Supply Size 50JZICM Fiop Electrical Schematic-50JZ CFM Adjust LO PIN NOM PIN HI PIN Unit PIN Select Size 48GP & 48JZ Gas Heating ICM Airflow Large Cabinet 48GP & 48JZ ICM Air Flow vs. Temperature Rise Chart48GP & 48JZ Gas Heating ICM Airflow Small Cabinet Minimum Airflow for Reliable Electric Heater Operation CFM Filter Pressure Drop Table in. wg Electric Heat Pressure Drop Table in. wgElectric Heat Pressure Drop Table in. wg Large Cabinet ICM Fiop WET Coil Pressure Drop in. wgCause Remedy Troubleshooting ChartPreliminary Information START-UP ChecklistBook Catalog No Form 48-21SI 10-01 Replaces 48-20SI Tab

48JZ (N) 024-060, 50JZ 024-060, 48GP (N) 024-060, 50GL 024-060 specifications

The Carrier 50GL 024-060, 48GP (N) 024-060, 50JZ 024-060, and 48JZ (N) 024-060 units are part of Carrier’s advanced HVAC solutions, offering efficient cooling and heating systems designed for both residential and light commercial applications. These models are known for their reliability, energy efficiency, and innovative technology, making them a popular choice for users looking to enhance comfort while reducing operational costs.

One of the main features of the Carrier 50GL series is its use of high-efficiency compressors. These compressors are engineered to operate quietly and effectively, providing optimal performance even during peak load conditions. Additionally, they are equipped with smart features that allow for precise temperature control and improved energy savings, often exceeding standard performance metrics.

The 48GP (N) units are particularly notable for their compact design, making them ideal for installations where space is a limitation. Despite their smaller footprint, they boast significant cooling and heating capacities, ensuring consistent comfort. The use of advanced variable-speed technology in these units helps to maintain consistent indoor temperatures while minimizing energy consumption.

The 50JZ and 48JZ (N) models incorporate advanced inverter technology, allowing for variable refrigerant flow. This technology adjusts the system's output according to the demand, resulting in lower energy usage and increased comfort levels. Additionally, these units feature enhanced filtration systems that improve indoor air quality by capturing airborne pollutants, allergens, and other contaminants.

Another key characteristic of these Carrier units is their durability. Built with high-quality materials, they are designed to withstand harsh environmental conditions, ensuring longevity and reduced maintenance requirements. Furthermore, the installation process is simplified, thanks to user-friendly design features that promote easy serviceability and accessibility.

Overall, the Carrier 50GL 024-060, 48GP (N) 024-060, 50JZ 024-060, and 48JZ (N) 024-060 HVAC units stand out in the industry for their advanced features, energy efficiency, and robust performance. They offer a comprehensive solution for anyone seeking reliable temperature control and improved indoor air quality in a variety of settings.
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