Check Equipment and Job Site, Operating Ambient

25HCB3 / 25HCC5

IMPORTANT: Always install the factory-supplied liquid-line filter drier. Obtain replacement filter driers from your distributor or branch.

INSTALLATION

Check Equipment and Job Site

Unpack Unit

Move to final location. Remove carton taking care not to damage unit.

Inspect Equipment

File claim with shipping company prior to installation if shipment is damaged or incomplete. Locate unit rating plate on unit corner panel. It contains information needed to properly install unit. Check rating plate to be sure unit matches job specifications.

Install on a Solid, Level Mounting Pad

If conditions or local codes require the unit be attached to pad, tie down bolts should be used and fastened through knockouts provided in unit base pan. Refer to unit mounting pattern in Fig. 2 to determine base pan size and knockout hole location.

For hurricane tie downs, contact distributor for details and PE Certification (Professional Engineer), if required.

On rooftop applications, mount on level platform or frame. Place unit above a load-bearing wall and isolate unit and tubing set from structure. Arrange supporting members to adequately support unit and minimize transmission of vibration to building. Consult local codes governing rooftop applications.

Roof mounted units exposed to winds above 5 mph (8.05 km/h) may require wind baffles. Consult the Service Manual - Residential Split System Air Conditioners and Heat Pumps for wind baffle construction.

NOTE: Unit must be level to within ±2° (±3/8 in./ft) per compressor manufacturer specifications.

Clearance Requirements

When installing, allow sufficient space for airflow clearance, wiring, refrigerant piping, and service. Allow 24 in. (609.6 mm) clearance to service end of unit and 48 in. (1219.2 mm) (above unit. For proper airflow, a 6-in. (152.4 mm) clearance on 1 side of unit and 12-in. (304.8 mm) on all remaining sides must be maintained. Maintain a distance of 24 in. (609.6 mm) between units. Position so water, snow, or ice from roof or eaves cannot fall directly on unit.

On rooftop applications, locate unit at least 6 in. (152.4 mm) above roof surface.

3/8---in. (9.53 mm) Dia. Tiedown Knockouts in Basepan(2) Places

View From Top

UNIT BASE PAN	TIEDOWN KNOCKOUT LOCATIONS in. (mm)
Dimension in. (mm)	A	B	C
26 X 26	9–1/8 (231.8)	4–7/16 (112.7)	21–1/4 (539.8)
(660 X 660)	9–1/8 (231.8)	4–7/16 (112.7)	21–1/4 (539.8)
(660 X 660)
31–1/2 X 31–1/2	9–1/8 (231.8)	6–9/16 (166.7)	24–11/16 (627.1)
(800 X 800)	9–1/8 (231.8)	6–9/16 (166.7)	24–11/16 (627.1)
(800 X 800)
35 X 35	9–1/8 (231.8)	6–9/16 (166.7)	28–7/16 (722.3)
(889 X 889)	9–1/8 (231.8)	6–9/16 (166.7)	28–7/16 (722.3)
(889 X 889)
			A05177

Fig. 2 - Tiedown Knockout Locations

Operating Ambient

The minimum outdoor operating ambient in cooling mode without accessory is 55°F (12.78°C), and the maximum outdoor operating ambient in cooling mode is 125°F (51.67°C). The maximum outdoor operating ambient in heating mode is 66 °F (18.89°C).

Check Defrost Thermostat

Check defrost thermostat to ensure it is properly located and securely attached. There is a liquid header with a brass distributor and feeder tube going into outdoor coil. At the end of the one of the feeder tubes, there is a 3/8 in. O.D. stub tube approximately 2 in. long. (See Fig. 3.) The defrost thermostat should be located on stub tube. Note that there is only one stub tube used with liquid header, and on most units it is the bottom circuit.

FEEDER TUBE

STUB TUBE

DEFROST

THERMOSTAT

A97517

Fig. 3 - Defrost Thermostat Location

Make Piping Connections

!WARNING

PERSONAL INJURY AND ENVIRONMENTAL HAZARD

Failure to follow this warning could result in personal injury or death.

Relieve pressure and recover all refrigerant before system repair or final unit disposal.

Use all service ports and open all flow-control devices, including solenoid valves.

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage or improper operation.

If ANY refrigerant tubing is buried, provide a 6-in (152.4 mm). vertical rise at service valve. Refrigerant tubing lengths up to 36-in (914.4 mm). may be buried without further special consideration. Do not bury lines longer than 36 in (914.4 mm).

Outdoor units may be connected to indoor section using accessory tubing package or field-supplied refrigerant grade tubing of correct size and condition. For tubing requirements beyond 80 ft, substantial capacity and performance losses can occur. Following the recommendations in the Residential Piping and Long Line Guideline will reduce these losses. Refer to Table 1 for accessory requirements. Refer to Table 2 for field tubing diameters.

There are no buried-line applications greater than 36 in. (914.4 mm)

If refrigerant tubes or indoor coil are exposed to atmosphere, they must be evacuated to 500 microns to eliminate contamination and moisture in the system.

25HCC5, 25HCB3 specifications

The Carrier 25HCB3 and 25HCC5 are technologically advanced HVAC systems designed to meet the needs of modern residential and commercial spaces. These models stand out for their efficiency, reliability, and eco-friendliness, making them excellent choices for anyone looking to enhance indoor comfort while minimizing energy consumption.

One of the main features of the Carrier 25HCB3 and 25HCC5 is their exceptional SEER (Seasonal Energy Efficiency Ratio) rating, which signifies a higher cooling efficiency compared to traditional air conditioning systems. These units leverage Carrier's innovative design to deliver cooling and heating solutions that are tailored to various climate conditions, ensuring optimal performance year-round.

Both models utilize a variable-speed compressor, which allows them to adjust their cooling output based on the specific needs of the space. This technology not only enhances comfort by providing consistent temperatures but also reduces energy consumption, contributing to lower utility bills. The variable-speed operation is particularly beneficial during transitional seasons, where less intensive cooling is required.

In addition to their variable-speed capabilities, the 25HCB3 and 25HCC5 offer advanced filtration systems designed to improve indoor air quality. These systems can effectively capture airborne allergens, dust, and particulates, creating a healthier living environment. Moreover, users can opt for enhanced filtration options, which utilize HEPA filters for even greater allergen removal.

Another key characteristic of these models is their quiet operation. The Carrier 25HCB3 and 25HCC5 are engineered with sound-dampening features that minimize operational noise. This is especially advantageous for residential applications where tranquility is valued.

Durability is also a hallmark of Carrier systems. The 25HCB3 and 25HCC5 are built with robust materials and advanced protective mechanisms, ensuring that they can withstand the rigors of various weather conditions and provide reliable service for years to come.

In terms of smart technology, these models are compatible with Carrier's smart thermostat solutions, allowing users to monitor and control their HVAC systems remotely. This connectivity enhances user convenience and promotes energy efficiency by enabling users to adjust settings based on their schedules and needs.

Overall, the Carrier 25HCB3 and 25HCC5 represent a significant advancement in HVAC technology, combining high efficiency, advanced features, and user-friendly operation. Whether for residential or commercial use, these systems provide a comprehensive solution for anyone seeking reliable and effective climate control.