Bryant 664B installation instructions Connect Condensate Drain, Unit Damage Hazard

When designing and installing ductwork, consider the following:

!CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in damage to unit components.

When connecting ductwork to units, do not drill deeper than 3/4 in. (19 mm) in shaded area shown in Fig. 2 or coil may be damaged.

19.17 in. (487 mm) 3.92 in.

(100 mm)

A08003

Fig. 2 - Area Not to be Drilled More Than 3/4-in. (19 mm)

Deep

1.All units should 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.

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 weather tight and airtight seal. When electric heat is installed, use fireproof 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. (610 mm) from electric heater element.

3.Size ductwork for cooling air quantity (cfm). The minimum air quantity for proper electric heater operation is listed in Table 2. Heater limit switches may trip at air quantities below those recommended.

4.Seal, insulate, and weatherproof all external ductwork. Seal, insulate and cover with a vapor barrier all ductwork passing through conditioned spaces. Follow latest Sheet Metal and Air Conditioning Contractors National Association (SMACNA) and Air Conditioning Contractors Association (ACCA) minimum installation standards for residential heating and air conditioning systems.

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

Fig. 6 shows a typical duct system with 664B unit installed.

CONFIGURING UNITS FOR DOWNFLOW (VERTICAL) DISCHARGE

!	WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before performing service or maintenance operations on the
system, turn off main power to unit and install lockout tag.
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 — Connect Condensate Drain
NOTE: When installing condensate drain connection be sure to
comply with local codes and restrictions.
Unit removes condensate through a 1-3/64 in. (27 mm) ID hole		664B
(using 3/4-in. (19 mm) OD piping or tubing) which is located at
the end of the unit. See Fig. 5 for location of condensate
connection.
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
(See Fig. 3 and 4). 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. (51 mm) trap using a 3/4-in. (19 mm) OD
tubing or pipe. (See Fig. 3 and 4.) 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. Prime
the trap with water. Connect a drain tube using a minimum of
3/4-in. (19 mm) PVC, 3/4-in. (19 mm) 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. (25 mm) for every 10 ft
(3 m) 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..

1” (25 mm) MIN.

TRAP

OUTLET

2” (51 mm) MIN.

A08001

Fig. 3 - Condensate Trap

TRAP

OUTLET

1" (25 mm) MIN.

2" (51 mm) MIN.

Fig. 4 - PVC Condensate Trap

3