Carrier 50ZHA024-060 Unit Specifications, Unit Damage Hazard, Provide for Condensate Disposal

Table 1—Unit Specifications

		UNIT WEIGHT		UNIT HEIGHT	CENTER OF GRAVITY IN. (MM)
UNIT	ELECTRICAL CHARACTERISTICS			IN. (MM)
		lb	kg	″A″	X	Y	Z
50ZHA024	208/230-1-60	293	133	30.13 (765)	14.0 (356)	19.0 (483)	12.0 (305)
50ZHA030	208/230-1-60	324	147	34.13 (867)	14.0 (356)	19.0 (483)	12.0 (305)
50ZHA036	208/230-1-60	377	171	42.13 (1070)	14.0 (356)	19.0 (438)	19.8 (503)
50ZHA042	208/230-1-60	389	177	42.13 (1070)	14.0 (356)	19.0 (483)	21.9 (556)
50ZHA048	208/230-1-60	384	175	42.13 (1070)	14.0 (356)	19.0 (483)	19.8 (503)
50ZHA060	208/230-1-60	433	197	42.13 (1070)	14.0 (356)	19.0 (483)	21.9 (556)

are field-installed and must be removed from the indoor blower compartment prior to start-up, even if they are not used for installation.

When designing and installing ductwork, consider the following:

UNIT DAMAGE HAZARD

Failure to follw this caution may result in damage to unit components. When connecting ductwork to units, do not drill deeper than 3/4 inch in shaded area shown in Fig. 3 or coil may be damaged.

•All units should have field-supplied filters installed in the return-air side of the unit. Recommended sizes for filters are shown in Table 2.

•Avoid abrupt duct size increases and reductions. Abrupt change in duct size adversely affects air performance.

IMPORTANT: Use flexible connectors between ductwork and unit to prevent transmission of vibration. Use suitable gaskets to ensure weathertight and airtight seal. When electric heat is installed, use fire proof canvas (or similar heat resistant material) connector between ductwork and unit discharge connection. If flexible duct is used, insert a sheet metal sleeve inside duct. Heat resistant duct connector (or sheet metal sleeve) must extend 24–in. from the unit discharge connection flange into the ductwork.

•Size ductwork for cooling air quantity (cfm). The minimum air quantity for proper electric heater operation is listed in Table 3. Heater limit switches may trip at air quantities below those recommended.

•Insulate and weatherproof all external ductwork. Insulate and cover with a vapor barrier all ductwork passing through conditioned spaces. Follow latest Sheet Metal and Air Condi- tioning Contractors National Association (SMACNA) and Air Conditioning Contractors Association (ACCA) minimum in- stallation standards for residential heating and air conditioning systems.

•Secure all ducts to building structure. Flash, weatherproof, and vibration-isolate duct openings in wall or roof according to good construction practices.

Figure 4 shows a typical duct system with 50ZHA unit installed.

CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE

ELECTRICAL SHOCK HAZARD

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

Before performing service or maintenance operations on system, turn off main power to unit and install lockout tag. Turn off accessory heater power switch if applicable.

Units are dedicated side supply products. They are not convertible to vertical air supply. A field-supplied plenum must be used to convert to vertical air discharge.

Step 6—Provide for Condensate Disposal

NOTE: Be sure that condensate-water disposal methods comply with local codes, restrictions, and practices.

Unit removes condensate through a 1 3/64-in. ID hole (using 3/4-in. OD piping or tubing) which is located at the end of the unit. See Fig. 2 for location of condensate connection.

19.173.92

A05195

Fig. 3—Area Not to Be Drilled More Than 3/4-in.

Condensate water can be drained directly onto the roof in rooftop installations (where permitted) or onto a gravel apron in ground- level installations. Install a field-supplied condensate trap at end of condensate connection to ensure proper drainage. Make sure that the outlet of the trap is at least 1 in. lower than the drain-pan condensate connection to prevent the pan from overflowing. Prime the trap with water. When using a gravel apron, make sure it slopes away from the unit.

If the installation requires draining the condensate water away from the unit, install a 2-in. trap using a 3/4-in. OD tubing or pipe. (See Fig. 5 and 6.) Make sure that the outlet of the trap is at least 1 in. lower than the unit drain-pan condensate connection to prevent the pan from overflowing. Prime the trap with water. Connect a drain tube using a minimum of 3/4-in. PVC, 3/4-in. CPVC, or 3/4-in. copper pipe (all field supplied). Do not undersize the tube. Pitch the drain tube downward at a slope of at least 1 in. for every 10 ft of horizontal run. Be sure to check the drain tube for leaks. Prime trap at the beginning of the cooling season start-up. Allowable glues for condensate trap connection are: Standard ABS, CPVC, or PVC cement.

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