To Shut Unit OFF

Step 8 — Remove lockout tag and turn on the electrical supply to unit. Normal operation will automatically begin. Service Test mode will automatically end (exit) after a recycle of power.

Step 9 — Open the shutoff valve on the gas supply piping.

Step 10 — To test the operation of the gas section, the HEAT submenu of Service Test may be used. See the Controls, Start-Up, Operation, Service, and Troubleshooting Instructions for more details on use of Service Test.

Step 11 — For normal operation, make sure that the set points are at the normal heat set points.

If the main burners fail to light, or the blower fails to come on, shut down gas heating section and call your dealer for service. Failure to follow these requirements could result in serious personal injury.

(Units with Electro-Mechanical Control)

Do not turn off the electrical power to unit without first turning off the gas supply.

Failure to follow these procedures can result in serious fire or personal injury.

See Fig. 1 for location of gas valve. Refer to Fig. 4 while proceeding with the following steps.

Step 1 — Set room thermostat to lowest temperature setting and set SYSTEM switch to OFF position.

Step 2 — Close the shutoff valve on the gas supply piping.

Step 3 — Turn off the electrical power supply to the unit and install lockout tag.

Step 4 — Open the heat section access panel.

Step 5 — Move ON/OFF switch on the internal gas valve to the OFF position.

Step 6 — Close the heat section access panel.

Step 7 — If unit is being shut down because of a malfunc- tion, call your dealer as soon as possible.

If unit is being shut down because the heating season has ended, restore electrical power to the unit to ensure operation of the cooling system during the cooling season.

Should overheating occur, or the gas supply fail to shut off, shut off the manual gas valve to the unit before shutting off the electrical supply.

Do not use this unit if any part has been under water. Imme- diately call a qualified service technician to inspect the unit and to replace any part of the control system and any gas control which has been under water.

TO SHUT UNIT OFF

(Units with ComfortLink™ Control)

Do not turn off the electrical power to unit without first turning off the gas supply.

Failure to follow these procedures can result in serious fire or personal injury.

See Fig. 1 for location of gas valve. Refer to Fig. 5 while proceeding with the following steps.

Step 1 — Turn off the unit operation by using the Scrolling Marquee to put the unit into Service Test mode. The Scrolling Marquee is located on the front of the unit control box behind the control box and compressor access door (see Fig. 6). Thermostat inputs and remote network commands are ignored when Service Test mode is ON.

a. A password may be required to change Service Test values depending on previous settings configured in the unit. Default password is “1111.”

b.Press the ESCAPE key until a blank screen is shown.

c.Use the arrow keys to scroll the red LED on the display to the “Service Test” position and press ENTER .

d.The control will display the Field Service Test Mode (TEST) setting. Press ENTER once to select the TEST setting for configuration. Press ENTER again for “OFF” to begin flashing.

e.Use the arrow keys to change the configuration from “OFF” to “ON,” then press ENTER and ESCAPE to save the setting.

Step 2 — Close the shutoff valve on the gas supply piping.

Step 3 — Turn off the electrical power supply to the unit and install lockout tag.

Step 4 — Open the heat section access panel.

Step 5 — Move ON/OFF switch on the internal gas valve to the OFF position.

Step 6 — Close the heat section access panel.

Step 7 — If unit is being shut down because of a malfunc- tion, call your dealer as soon as possible.

If unit is being shut down because the heating season has ended, restore electrical power to the unit to ensure operation of the cooling system during the cooling season.

Should overheating occur, or the gas supply fail to shut off, shut off the manual gas valve to the unit before shutting off the electrical supply.

48PG03---16 specifications

The Carrier 48PG03---16 is a standout model in the realm of commercial rooftop air conditioning units, offering innovative technology and exceptional performance for a variety of applications. Designed with rigorous industry standards in mind, this unit combines efficiency, durability, and advanced features, making it a popular choice for both small and medium-sized commercial buildings.

One of the main features of the 48PG03---16 is its impressive cooling capacity, which allows it to effectively regulate indoor temperatures even in the hottest climates. The unit boasts a nominal cooling capacity of 3 tons, making it suitable for spaces that require consistent cooling throughout the hot months. Its effective cooling is complemented by an energy-efficient design that uses advanced refrigeration technology to maximize performance while minimizing energy consumption.

This Carrier model is equipped with a high-efficiency scroll compressor, which contributes to its reliability and overall low operational noise. The use of scroll compression technology ensures smooth operation and reduces the risk of mechanical failure, making this unit a long-term investment for building owners. Additionally, the 48PG03---16 features a robust heat exchanger designed to optimize heat transfer efficiency and ensure reliable performance across a wide range of outdoor conditions.

In terms of controls and management, the Carrier 48PG03---16 allows for advanced programmability, facilitating better temperature control and energy management. The unit can be easily integrated with smart building technologies, enabling users to monitor and adjust settings remotely for enhanced convenience and efficiency.

Durability is another hallmark of the Carrier 48PG03---16. Constructed with weather-resistant materials and equipped with a protective cover for critical components, this unit can withstand various environmental factors, including moisture and debris. Its compact design also makes it an ideal fit for rooftop installations, saving valuable ground space.

In summary, the Carrier 48PG03---16 embodies a blend of performance, efficiency, and durability tailored for commercial applications. With its advanced technologies, user-friendly controls, and robust construction, it not only meets but exceeds the expectations of building owners and facility managers looking for a reliable HVAC solution. Whether for retail spaces, office buildings, or larger facilities, the Carrier 48PG03---16 remains a top contender in commercial air conditioning.