DEFROST OPERATION

The heat pump has a control system designed to defrost the outdoor coil by warming it up to keep it clear of ice and operating efficiently. When the temperature drops below 40°F, the control system will sense that conditions are right for the formation of ice. After a time period of 60 to 90 minutes, the heat pump will go into the defrost mode. At this time, the outdoor coil may be heavily iced or no ice may be visible, depending on the outdoor humidity. When the unit starts the defrost mode, the outdoor fan will turn off and a hissing noise may be heard that disappears as defrost continues. As the outdoor coil warms, you may notice steam coming off the coil. When the coil reaches a predetermined temperature (usually within 7 minutes), the defrost cycle will end. You may hear a hiss as the unit switches back to the normal heating mode.

CAUTION

Wait at least 3 minutes after turning the heat pump off before trying to restart. If an attempt is made to start the compressor before the refrigerant pressures are equalized, the unit may fail to restart. An additional waiting period will then be required before restarting.

MAINTENANCE INSTRUCTIONS

For continuing high performance and to minimize possible equipment failure, periodic maintenance must be performed on this equipment. Frequency of maintenance may vary depending upon geographic areas, such as coastal applications.

WARNING

BE SURE THE UNIT DISCONNECT IS IN THE “OFF” POSITION AND THAT ALL ELECTRICAL POWER TO THE UNIT IS TURNED “OFF” BEFORE CLEANING THE SYSTEM.

1.Keep the outdoor unit clean. Wash it down with a garden hose if necessary.

WARNING

SERIOUS PERSONAL INJURY OR DEATH MAY RESULT IF WATER SPRAY IS DIRECTED TOWARD LIVE ELECTRICAL CONNECTIONS OR POWER SOURCES.

2.Remove any loose grass, leaves, papers, etc., from the area around the condenser coil. These could reduce the air supply through the coil and reduce the amount of cooling.

3.Always install and keep system filters clean. Consult your licensed Contractor for filter replacement schedules and instructions.

10 CONDENSING UNIT NOMENCLATURE

 

 

 

 

 

 

CH

24

A

B

D

1

V

F

 

Poduct Type

 

 

 

 

 

 

Brand

C = Air Conditoner

 

 

 

 

 

 

CH = Heat Pump

 

 

 

 

 

 

F= Fedders

Nominal Capacity

 

 

 

 

 

 

Fitting Type

 

 

 

 

 

 

V = Sweat

18

= 18000 BTU/H [5.28 kW]

 

 

 

 

 

 

 

 

24

= 24000 BTU/H [7.03 kW]

 

 

 

 

 

 

Electrical Designation

30

= 30000 BTU/H [8.79 kW]

 

 

 

 

 

 

1

= 208/230 Volts, 1 Phase, 60 Hz

36

= 36000 BTU/H [10.55 kW]

 

 

 

 

 

 

 

 

 

 

 

 

2

= 230 Volts, 1 Phase, 50 Hz

42

= 42000 BTU/H [12.31 kW]

 

 

 

 

 

 

 

 

 

 

 

 

3

= 208/230 Volts, 3 Phase, 60 Hz

48

= 48000 BTU/H [14.07 kW]

 

 

 

 

 

 

 

 

 

 

 

 

4

= 460 Volts, 3 Phase, 60 Hz

60

= 60000 BTU/H [17.5 kW]

 

 

 

 

 

 

 

 

 

 

 

 

5

= 230 Volts, 3 Phase, 50 Hz

 

 

 

 

 

 

 

 

Series

 

 

 

 

 

 

6

= 380 Volts, 3 Phase, 50 Hz

 

 

 

 

 

 

Variations

A

 

 

 

 

 

 

 

Chassis Size

 

 

 

 

 

 

D = R-22 Refrigerant

 

 

 

 

 

 

E = R-407C Refrigerant

B = 21 1/2” W x 21 1/2” D x H

 

 

 

 

 

 

F = R-410A Refrigerant

C = 29 1/2” W x 29 1/2” D x H

 

 

 

 

 

 

 

 

6

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Fedders CH18ABD1 warranty Defrost Operation, Maintenance Instructions
Page 6 Page 8

CH18ABD1 specifications

The Fedders CH18ABD1 is a powerful and efficient air conditioning unit that is designed for residential and light commercial applications. This model is particularly popular for its ability to deliver rapid cooling and heating, making it an ideal choice for various climates and seasonal changes.

One of the standout features of the Fedders CH18ABD1 is its robust 18,000 BTU cooling capacity. This allows it to efficiently cool large spaces, making it suitable for medium to large rooms. The unit also offers a heating capacity, which provides flexibility for year-round comfort. The ability to switch between cooling and heating modes allows users to enjoy a comfortable indoor environment no matter the weather outside.

The Fedders CH18ABD1 is designed with advanced technologies that enhance its efficiency and performance. A key technology is its use of a high-efficiency compressor, which significantly reduces energy consumption while maintaining effective temperature control. Additionally, this model includes a programmable thermostat that allows users to set precise temperatures and schedules, promoting energy savings and convenience.

In terms of noise levels, the Fedders CH18ABD1 operates quietly, making it suitable for settings where noise is a concern, such as bedrooms or offices. The unit’s design incorporates sound-dampening features that minimize operational sound, ensuring an unobtrusive climate control experience.

Installation and maintenance of the Fedders CH18ABD1 is relatively straightforward. The unit is designed for easy mounting in windows or through walls, providing flexibility in placement. Regular maintenance is facilitated by accessible filters that can be easily cleaned or replaced, helping sustain optimal performance over time.

Furthermore, the unit is equipped with various modes, such as fan-only and auto-restart functions. The fan mode allows for air circulation without cooling, while the auto-restart function ensures the unit resumes its previous settings after a power outage.

In summary, the Fedders CH18ABD1 stands out for its powerful cooling and heating capabilities, advanced efficiency technologies, and user-friendly features. Its flexible operation, quiet performance, and ease of maintenance make it a reliable choice for anyone seeking an effective and efficient air conditioning solution. This unit is an excellent investment for those aiming to maintain a comfortable living environment throughout the year.
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