Bryant 340MAV Condensate Drain General, II. Application, III. Condensate Drain Protection

It is important that vent terminations be made as shown to avoid recirculation of flue gases. Dimension "A" in Fig. 41, 42, 43, 44, and 45 represents distance between pipes or rain shields, as touching or 2-in. maximum separation.

CONDENSATE DRAIN

I. GENERAL

Condensate trap is shipped installed in the blower shelf and factory connected for UPFLOW applications. Condensate trap must be RELOCATED for use in DOWNFLOW and HORIZONTAL applications.

Condensate trap MUST be used for all applications.

An external trap is not required when connecting the field drain to this condensate trap.

The field drain connection (condensate trap or drain tube coupling) is sized for 1/2-in. CPVC, 1/2-in. PVC, or 5/8-in. ID tube connection.

Drain pipe and fittings must conform to ANSI standards and ASTM D1785, D2466 or D2846. CPVC or PVC cement must conform to ASTM D2564 or F493. Primer must conform to ASTM F656. In Canada, use CSA or ULC listed schedule 40 CPVC or PVC drain pipe, fittings, and cement.

When a condensate pump is required, select a pump which is approved for condensing furnace applications. To avoid conden- sate spillage, select a pump with an overflow switch.

→CAUTION: Unit must not be installed, operated, and then turned off and left in an unoccupied structure during cold weather when temperature drops to 32°F and below

unless drain trap and drain line have adequate freeze protection. See Service and Maintenance Instructions for winterizing procedure. (See Fig. 15.) Failure to follow this caution will result in minor unit operation.

Furnace condensate is mildly acidic, typically in the pH range of

3.2to 4.5. Due to corrosive nature of this condensate, a condensate pH neutralizing filter may be desired. Check with local authorities to determine if a pH neutralizer is required.

II. APPLICATION

The furnace, A/C, and humidifier drains may be combined and drained together. The A/C drain must have an external, field- supplied trap prior to the furnace drain connection. All drain connections (furnace, A/C, or humidifier) must be terminated into an open or vented drain as close to the respective equipment as possible to prevent siphoning of the equipment’s drain.

OPEN STAND

PIPE FOR

A/C OR

HUMIDIFIER

DRAIN

TEE

TO OPEN

DRAIN

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Fig. 46—Example of Field Drain Attachment

1.Fold heat tape in half and wrap on itself 3 times.

2.Locate heat tape between sides of condensate trap back. (See Fig. 47.)

3.Use wire ties to secure heat tape in place. Wire ties can be positioned in notches of condensate trap sides. (See Fig. 47.)

4.Wrap field drain pipe with remaining heat tape, approxi- mately 1 wrap per ft.

5.When using field-supplied heat tape, follow heat tape manufacturer’s instructions for all other installation guide- lines.

See Fig. 46 for example of possible field drain attachment using 1/2-in. CPVC or PVC tee for vent and A/C or humidifier drain connection.

Outdoor draining of the furnace is permissible if allowed by local codes. Caution should be taken when freezing ambient may freeze drain pipe and prohibit draining.

WARNING: Caution should be taken to prevent drain- ing where slippery conditions may cause personal inju- ries. Excessive condensate draining may cause saturated soil conditions which may result in damage to plants.

III. CONDENSATE DRAIN PROTECTION

Freezing condensate left in condensate trap and drain line may cause cracks, and possible water damage may occur. If freeze protection is required, use condensate freeze protection accessory or equivalent 3 to 6 watt per ft at 120v and 40°F self-regulating, shielded, and waterproof heat tape. See Installation Instructions supplied with accessory or heat tape manufacturer’s recommenda- tions.

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CONDENSATE TRAP

WIRE TIE(S)

HEAT TAPE (3 WRAPS MINIMUM)

Fig. 47—Condensate Trap Heat Tape

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