!CAUTION

UNIT RELIABILITY HAZARD

Failure to follow this caution may result in reduced unit performance.

High velocity water from a pressure washer, garden hose, or compressed air should never be used to clean a coil. The force of the water or air jet will bend the fin edges and increase airside pressure drop.

Totaline Environmentally Sound Coil Cleaner Application Instructions

1.Proper eye protection such as safety glasses is recommended during mixing and application.

2.Remove all surface loaded fibers and dirt with a vacuum cleaner as described above.

3.Thoroughly wet finned surfaces with clean water and a low velocity garden hose, being careful not to bend fins.

4.Mix Totaline environmentally sound coil cleaner in a 21/2 gallon garden sprayer according to the instructions included with the cleaner. The optimum solution temperature is 100_F.

IMPORTANT: Do NOT USE water in excess of 130_F, as the enzymatic activity will be destroyed.

5.Thoroughly apply Totalineenvironmentally sound coil cleaner solution to all coil surfaces including finned area, tube sheets and coil headers.

6.Hold garden sprayer nozzle close to finned areas and apply cleaner with a vertical, up-and-down motion. Avoid spraying in horizontal pattern to minimize potential for fin damage.

7.Ensure cleaner thoroughly penetrates deep into finned areas.

8.Interior and exterior finned areas must be thoroughly cleaned.

9.Finned surfaces should remain wet with cleaning solution for 10 minutes.

10.Ensure surfaces are not allowed to dry before rinsing. Reapplying cleaner as needed to ensure 10-minute saturation is achieved.

11.Thoroughly rinse all surfaces with low velocity clean water using downward rinsing motion of water spray nozzle. Protect fins from damage from the spray nozzle.

Condensate Drain Pan

Check and clean each year at the start of the cooling season. In winter, keep drains and traps dry.

To clean the condensate pan:

1.Disconnect condensate drain system from side or bottom drain connection.

2.Remove and clean trap.

3.Remove 4 screws securing condensate pan access cover to unit. Save screws and panel.

4.Slide condensate pan out from unit and clean. Pan is made of non-corrosive plastic. Use a mild cleaner to remove heavy deposits of dirt and grime.

5.Replace pan in unit.

6.Replace condensate pan access cover with 4 screws saved from Step 3.

7.Re-attach and prime condensate trap.

8.Connect condensate drainage system.

ROLLOUT

 

INDUCED

 

SWITCH

 

DRAFT

 

 

 

MOTOR

 

 

 

COMBUSTION

 

 

 

FAN HOUSING

 

SECTION

MAIN BURNER SECTION

MAIN GAS

48/50PD

VALVE

 

 

 

HEAT EXCHANGER

 

 

 

 

 

C07037

 

Fig. 28 - Typical Gas Heating Section

Filters

Clean or replace at start of each heating and cooling season, or more often if operating conditions require. Refer to unit Installation Instructions for type and size.

Outdoor-Air Inlet Screens

Clean screens with steam or hot water and a mild detergent. Do not use throwaway filters in place of screens. See unit installation instructions for quantity and size.

Main Burner (48PD)

At the beginning of each heating season, inspect for deterioration or blockage due to corrosion or other causes. Observe the main burner flames. Refer to Main Burners section.

Flue Gas Passageways (48PD)

The flue collector box and heat exchanger cells may be inspected by opening heat section access door, flue box cover, and main burner assembly. (See Fig. 28.) Refer to Main Burners section for burner removal sequence. If cleaning is required, clean tubes with a wire brush. Use Caution with ceramic heat exchanger baffles. When installing retaining clip, be sure the center leg of the clip extends inward toward baffle. (See Fig. 29.)

CERAMIC

BAFFLE

CLIP

NOTE: One baffle and clip will be in each upper tube of the heat exchanger.

C07260

Fig. 29 - Removing Heat Exchanger Ceramic

Baffles and Clips

Combustion-Air Blower (48PD)

Clean periodically to assure proper airflow and heating efficiency. Inspect blower wheel every fall and periodically during heating season. For the first heating season, inspect blower wheel bi-monthly to determine proper cleaning frequency.

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Carrier 48/50PD05 Condensate Drain Pan, Filters, Outdoor-Air Inlet Screens, Main Burner 48PD, Flue Gas Passageways 48PD

48/50PD05 specifications

The Carrier 48/50PD05 is a remarkable addition to Carrier's lineup of rooftop units, offering advanced cooling and heating solutions for commercial applications. Designed for medium-sized buildings, this unit is well-suited for both new installations and as a replacement for older systems, thanks to its versatile features and efficient performance.

One of the standout features of the 48/50PD05 is its energy efficiency. It incorporates state-of-the-art technology to achieve high Seasonal Energy Efficiency Ratios (SEER) and EER ratings, reducing operational costs while delivering superior comfort. The unit is also compliant with the latest energy regulations, making it an environmentally friendly choice for building owners concerned about sustainability.

The 48/50PD05 is equipped with a highly efficient scroll compressor, which not only enhances performance but also contributes to quiet operation. This is a significant advantage in commercial spaces where noise levels need to be kept in check for comfort and productivity. Additionally, the unit includes advanced airflow design, ensuring even distribution of conditioned air throughout the space.

Technologically, the Carrier 48/50PD05 features Carrier's Infinity Control system, which allows for precise control of indoor climate. This intelligent control mechanism can be integrated with smart building management systems, enabling users to monitor and manage energy use effectively. Wi-Fi connectivity is also available, providing remote access for real-time adjustments and diagnostics.

Durability is another characteristic of the 48/50PD05. Constructed with high-quality materials, the unit withstands various environmental conditions, ensuring longevity and reliability. Moreover, the modular design facilitates easy maintenance, making service procedures efficient and cost-effective.

In addition to cooling, the Carrier 48/50PD05 offers heating capabilities, often utilizing gas or electric heating options that can be tailored to the specific needs of a building. The unit can also be equipped with integrated economizers, allowing for free cooling during suitable outdoor conditions, further enhancing energy savings.

Overall, the Carrier 48/50PD05 stands out as a high-performance HVAC solution that combines efficiency, technology, and durability. It provides building owners with a versatile tool to ensure comfort while minimizing their environmental footprint. With a strong emphasis on energy savings and advanced control features, this rooftop unit is a smart investment for any commercial property.