REGULAR DEALER MAINTENANCE

In addition to the type of routine maintenance you might be willing to perform, your unit should be inspected regularly by a properly trained service technician. An inspection (preferably each year, but at least every other year) should include the following:

1.Inspection of all flue product passages — including the burners, combustion baffles, heat exchanger, flue collec- tor box, and vent pipe.

2.Inspection of all combustion-air and ventilation-air pas- sages and openings.

3.Close inspection of all gas pipes leading to and inside your unit.

4.Inspection, and if required, cleaning of the condenser and evaporator coils.

5.Inspection, and if required, cleaning of the evaporator drain pan.

6.Inspection, cleaning, and lubrication of blower wheel housing and motor.

7.Inspection of all supply-air and return-air ducts for leaks, obstructions, and insulation integrity. Any problems found should be resolved at this time.

8.Inspection of the unit base to ensure that no cracks, gaps, etc., exist which may cause a hazardous condition.

9.Inspection of the unit casing for signs of deterioration.

10.Inspection of all electrical wiring and components to assure proper connection.

11.Inspection for leaks in the refrigerant circuit. Pressure- check to determine appropriate refrigerant charge

12.Operational check of the unit to determine working con- ditions. Repair or adjustment should be made at this time.

13.Your servicing dealer may offer an economical service contract that covers seasonal inspections. Ask for further details.

Complete Service Instructions can be found in the unit Installation, Start-Up and Service Instructions.

BEFORE YOU CALL FOR SERVICE CHECK FOR SEVERAL EASILY SOLVED PROBLEMS

If insufficient heating or cooling is suspected:

( ) Check for sufficient airflow. Check the air filter for dirt. Check for blocked return-air or supply-air grilles. Be sure they are open and unobstructed. If these checks do not reveal the cause, call your servicing dealer.

If your unit is not operating at all, check the following list for easy solutions:

( ) If using a thermostat, check to be sure that your thermo- stat temperature selector is set above the indoor temperature during the heating season, or below the indoor temperature during the cooling season. Be sure the SYSTEM switch in the proper HEAT or COOL position and not in the OFF position.

( ) If using ComfortLink™ control, check Scrolling Mar- quee to be sure unit is not in SERVICE TEST mode. Check set points are properly set.

(

)

Is the electrical supply switch on? Are any fuses blown,

or has the circuit breaker tripped?

(

)

During the heating season, check the manual gas shutoff

valve. Is this lever parallel with the pipe, indicating that the valve is open? Or is the lever at the right angle, indicating that the valve is closed? If closed, has the gas been shut off for safety reasons? Otherwise, you may open the valve and follow the start-up procedures listed in this manual.

NOTE: Before proceeding with the next check, turn off the electrical power supply to the unit.

( ) During the heating season, check the control dial on the gas valve. Is it in the ON position? If it is not, be sure it has not been turned off for the purpose of safety. If nothing else is incorrect, follow the start-up procedures in this manual.

( ) If your unit still fails to operate, call your servicing dealer for troubleshooting and repairs. Specify the model and serial numbers of your unit. (Record them in this manual in the space provided.) If the dealer knows exactly which unit you have, he may be able to offer suggestions over the phone, or save valu- able time through knowledgeable preparation for the service call.

IN CASE OF TROUBLE

If, after performing the above, unit performance is unsatis- factory, shut off the unit and call your dealer.

Dealer’s Name _____________________________________

Telephone No. ______________________________________

Unit Model ________________________________________

Unit Serial Number _________________________________

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Carrier 48PG03---16 specifications Regular Dealer Maintenance, Case of Trouble
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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.
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