Bryant 558D Ð Internal Trap Condensate Drain, Ð External Trap Condensate Drain

Fig. 7 Ð Internal Trap Condensate Drain

NOTE: Trap should be deep enough to offset maximum unit static dif- ference. A 4-in. trap is recommended.

Fig. 8 Ð External Trap Condensate Drain

3.Use ¯exible transition between rigid ductwork and unit to prevent transmission of vibration. The transition may be screwed or bolted to duct ¯anges. Use suitable gas- kets to ensure weather- and airtight seal.

4.When horizontal return is used, install external ®eld- supplied air ®lter(s) in return-air ductwork where it is easily accessible for service. Recommended ®lter sizes are shown in Table 1.

5.Size all ductwork for maximum required air¯ow (either heating or cooling) for unit being installed. Avoid abrupt duct size increases or decreases.

6.Adequately insulate and weatherproof all ductwork located outdoors. Insulate ducts passing through un- conditioned space, and use vapor barrier in accordance with latest issue of SMACNA (Sheet Metal and Air Con- ditioning Contractors National Association) and ACCA (Air Conditioning Contractors National Association) mini- mum installation standards for heating and air condi- tioning systems. Secure all ducts to building structure.

A minimum clearance to combustibles is not required around ductwork on vertical discharge units. On hori- zontal discharge units, a minimum clearance of one in. is required for the ®rst 12 in. of ductwork.

7.Flash, weatherproof and vibration-isolate all openings in building structure in accordance with local codes and good building practices.

Fig. 9 Ð Location of Coil Area Not to be Drilled C. Electrical Connections

WARNING: The unit cabinet must have an uninter- rupted, unbroken, electrical ground to minimize the pos- sibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire con- nected to the unit ground lug in the control compart- ment or conduit approved for electrical ground when installed in accordance with NEC ANSI (American National Standards Institute)/NFPA, latest edition, (in Canada, Canadian Electrical Code CSA [Canadian Standards Association] C22.1); and local electrical codes. Failure to adhere to this warning could result in per- sonal injury.

CAUTION: Failure to obey the following precau- tions could result in damage to the unit being installed:

Field Power Supply (Fig. 10 and 11)

1.Make all electrical connections in accordance with NEC ANSI/NFPA, latest edition, and local electrical codes gov- erning such wiring. In Canada, all electrical connec- tions must be in accordance with CSA Standard C22.1 Canadian Electrical Code Part 1 and applicable local codes. Refer to unit wiring diagram.

2.A unit disconnect switch is required within sight from the unit. The disconnect switch may be mounted on the unit corner post. When mounting disconnect switch, be sure the unit rating plate is not obstructed.

3.Use only copper conductor for connections between ®eld- supplied electrical disconnect switch and unit. The use of aluminum wire is not recommended. Maximum wire size is number 2 AWG (American Wire Gage) on units without heat. The maximum wire size is number 2/0 AWG on units with heat.

4.Insulate low-voltage wires for highest voltage con- tained within conduit when low-voltage control wires are run in same conduit as high-voltage wires.

5.Do not damage internal components when drilling through any panel to mount electrical hardware, conduit, etc.

High-Voltage Connections (Fig. 10)

The unit must have a separate electrical service with a ®eld- supplied, waterproof, fused, disconnect switch mounted at, or within sight of, the unit. Refer to the unit rating plate for maximum fuse/circuit breaker size and minimum circuit amps (ampacity) for wire sizing. Be sure disconnect switch does not obstruct unit rating plate.

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