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

!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 Totaline→ environmentally 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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