3.

Use flexible transition between rigid ductwork and unit to

 

 

prevent transmission of vibration. The transition may be

 

 

screwed or bolted to duct flanges. Use suitable gaskets to

 

 

ensure weather-tight and airtight seal.

 

4.

All units must have field-supplied filters or accessory filter

 

 

rack installed in the return-air side of the unit.

 

 

Recommended sizes for filters are shown in Table 1.

 

5.

Size all ductwork for maximum required airflow (either

 

 

heating or cooling) for unit being installed. Avoid abrupt

 

 

duct size increases or decreases or performance may be

 

 

affected.

 

6.

Adequately insulate and weatherproof all ductwork located

 

 

outdoors. Insulate ducts passing through unconditioned

 

 

space, and use vapor barrier in accordance with latest issue

 

 

of Sheet Metal and Air Conditioning Contractors National

 

 

Association (SMACNA) and Air Conditioning Contractors

 

 

of America (ACCA) minimum installation standards for

-- A

 

 

heating and air conditioning systems. Secure all ducts to

--

 

building structure.

607C

7.

Flash, weatherproof, and vibration-isolate all openings in

 

building structure in accordance with local codes and good

 

 

building practices.

Step 6 — Provide for Condensate Disposal

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

The 607--A units dispose of condensate through a 3/4 in. NPT female fitting that exits on the compressor end of the unit. 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. (25 mm) 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 field-supplied 2 -in. (51mm) trap at the condensate connection to ensure proper drainage. Condensate trap is available as an accessory or is field-supplied. Make sure that the outlet of the trap is at least 1 in. (25 mm) lower than the unit drain-pan condensate connection to prevent the pan from overflowing. Connect a drain tube using a minimum of field-supplied 3/4-in. PVC or field-supplied 3/4-in. copper pipe at outlet end of the 2-in. (51 mm) trap. (See Fig. 11) Do not undersize the tube. Pitch the drain tube downward at a slope of at least 1 in. (25 mm) every 10 ft (3 m) of horizontal run. Be sure to check the drain trough for leaks. Prime the trap at the beginning of the cooling season start-up.

A

C

MAXIMUM ALLOWABLE

BDIFFERENCE in. (mm)

 

A-B

B-C

 

A-C

1/4

(6.35)

1/4

(6.35)

1/4

(6.35)

 

 

 

 

 

 

A07925

Fig. 7 - Unit Leveling Tolerances

OPTIONAL

OPTIONAL

RETURN

SUPPLY

AIR

AIR

OPENING

OPENING

 

(50.8mm)

 

EVAP. COIL

COND. COIL

A07926

Fig. 8 - Slab Mounting Detail

Step 7 — Install Electrical Connections

!CAUTION

UNIT COMPONENT DAMAGE HAZARD

Failure to follow this caution may result in damage to the unit being installed.

1.Make all electrical connections in accordance with NEC NFPA 70 (latest edition) and local electrical codes governing such wiring. In Canada, all electrical connections must be in accordance with CSA standard C22.1 Canadian Electrical Code Part 1 and applicable local codes. Refer to unit wiring diagram.

2.Use only copper conductor for connections between field-supplied electrical disconnect switch and unit. DO NOT USE ALUMINUM WIRE.

3.Be sure that high-voltage power to unit is within operating voltage range indicated on unit rating plate. On 3-phase units, ensure phases are balanced within 2 percent. Consult local power company for correction of improper voltage and/or phase imbalance.

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

!WARNING

ELECTRICAL SHOCK HAZARD

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

The unit cabinet must have an uninterrupted, unbroken electrical ground. This ground may consist of an electrical wire connected to the unit ground screw in the control compartment, or conduit approved for electrical ground when installed in accordance with NEC,NFPA 70 National Fire Protection Association (latest edition) (in Canada, Canadian Electrical Code CSA C22.1) and local electrical codes.

High-Voltage Connections

The unit must have a separate electrical service with a field-supplied, waterproof disconnect switch mounted at, or within sight from the unit. Refer to the unit rating plate, NEC and local codes for maximum fuse/circuit breaker size and minimum circuit amps (ampacity) for wire sizing.

The field-supplied disconnect may be mounted on the unit over the high-voltage inlet hole when the standard power and low-voltage entry points are used. See Fig. 2 and 3 for acceptable location. Remove high voltage knockout.

See unit wiring label (Fig. 12-14) and Fig. 9 for reference when making high voltage connections. Proceed as follows to complete the high-voltage connections to the unit.

8

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Bryant 607C-A Provide for Condensate Disposal, Install Electrical Connections, High-Voltage Connections