Bryant 355M-40-5, 355M-40-4 IV. Multiventing and Vent Terminations, Condensate Drain General

NOTE: Do not allow insulation or other materials to accumulate inside of pipe assembly when installing it through hole.

Roof terminationsÐLocate assembly through roof to ap- propriate height as shown in Fig. 32.

Sidewall terminationsÐLocate assembly through sidewall with rain shield positioned no more than 1-in. from wall as shown in Fig. 33.

5.Disassemble loose pipe fittings. Clean and cement using same procedures as used for system piping.

6.Check required dimensions as shown in Fig. 32 or 33.

IV. MULTIVENTING AND VENT TERMINATIONS

When 2 or more 355MAV Furnaces are vented near each other, each furnace must be individually vented. NEVER common vent or breach vent 355MAV furnaces. When 2 or more 355MAV furnaces are vented near each other, 2 vent terminations may be installed as shown in Fig. 36, 37, 38, 39, or 40, but next vent termination must be at least 36 in. away from first 2 terminations. It is important that vent terminations be made as shown to avoid recirculation of flue gases. Dimension "A" in Fig. 36, 37, 38, 39, and 40 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 or D2846. CPVC or PVC cement and primer must conform to ASTM D2564 or F493. In Canada, use CSA or ULC certified 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.

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.

See Fig. 41 for example of possible field drain attachment using 1/2-in. CPVC or PVC tee for vent and A/C or humidifier drain connection.

32°F MINIMUM INSTALLED AMBIENT OR FREEZE PROTECTION REQUIRED

A93058

CAUTION: Unit must not be installed, operated, and then turned and left off in an unoccupied structure during cold weather when temperature drops to 32°F or below unless drain trap and drain line have adequate freeze protection. See Service and Maintenance Procedures for winterizing procedure.

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.

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

2.Locate heat tape between sides of condensate trap back. (See Fig. 42.)

3.Use wire ties to secure heat tape in place. Wire ties can be positioned in notches of condensate trap sides. (See Fig. 42.)

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.

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