Bryant 355MAV instruction manual Condensation Drain Protection

Page 41

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 l/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 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 condensate spillage, select a pump with an overflow switch.

Furnace condensate is mildly acidic, typically in the pH range of 3.2 to 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.

A

A96128

Fig. 44—Rooftop Termination (Dimension “A” is Touching or 2–in. Maximum Separation)

VENT

VENT A

COMBUSTION

AIR

A93056

Fig. 45—Concentric Vent and Combustion-Air Roof Termination

(Dimension “A” is Touching or 2-in. Maximum Separation)

B. 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. 49 for example of possible field drain attachment using 1/2-in. CPVC or PVC tee for vent and A/C or humidifier drain connection.

CAUTION: Unit must 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 Instructions for winterizing procedure. (See Fig. 15.)

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 draining where slippery conditions may cause personal injuries. Excessive condensate draining may cause saturated soil conditions which may result in damage to plants.

C. Condensation 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 120-v and 40°F self-regulating, shielded, and waterproof heat tape. See Installation Instructions supplied with accessory or heat tape manufacturer’s recommendations.

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Contents Table of Contents Installation, Start-up, and Operating InstructionsLocation Codes and Standards Safety ConsiderationsIntroduction Unit Size DimensionsClearances to Combustibles Installer Packet IncludesApplications Procedure 1-GENERAL Electrostatic Discharge ESD Precaution ProcedureCondensate Trap Tubing Factory-Shipped Orientation Procedure 2-UPFLOW ApplicationsCondensate Trap Location Factory-Shipped Orientation Condensate Trap Tubing Alternate Upflow Orientation Condensate Trap Location Alternate Upflow OrientationProcedure 3-DOWNFLOW Applications Pressure Switch TubingCondensate Trap Field Drain Attachment Condensate Trap Freeze ProtectionCondensate Trap Tubing Downflow Tube Configuration Right-Hand Trap InstallationCondensate Trap Field Drain Attachment Construct a Working Platform Condensate Trap Field Drain AttachmentsAttic Location and Working Platform Horizontal Right Tube Configuration Furnace Location for Proper Condensate Drainage Location Procedure 1-GENERALProcedure 2-LOW-FIRE only Installation Prohibit Installation on BackInstallation Procedure 1-LEVELING Legs if Desired Procedure 3-FURNACE Location Relative to CoolingequipmentProcedure 4-HAZARDOUS Locations Furnace Plenum Opening Floor Opening Opening DimensionsProcedure 3-INSTALLATION in Horizontal Applications Floor and Plenum Opening DimensionsGeneral Requirements Procedure 4-AIR DuctsReturn Air Connections Ductwork Acoustical TreatmentSupply Air Connections Procedure 6-BOTTOM Closure Panel Procedure 5-FILTER ArrangementProcedure 7-GAS Piping Filter InformationBottom Filter Arrangement Internal Pipe Diameter Size Maximum Capacity of PipeNominal Length of Pipe FT Wiring Procedure 8-ELECTRICAL ConnectionsElectrical Data AccessoriesRemoval of Existing Furnaces from Common Vent Systems Procedure 9-DIRECT VentingUnit Wiring Diagram Combustion-Air and Vent Piping Control Center355MAV Variable Speed Furnace Control Opening Location Clearance FTCombustion-Air and Vent Pipe Connections Short Vent 5 to 8 ft System Altitude FT Maximum Allowable Pipe Length ft4001 to 5000‡ Intake Housing Plug Fitting Drain Roof Termination Preferred Concentric Vent and Combustion-Air RoofTermination Preferred Sidewall Termination of Less than 12 General Procedure 10-CONDENSATE DrainMultiventing and Vent Terminations Condensation Drain Protection ″ 25 mm Maximum TYP Sequence of Operation Example of Field Drain AttachmentProcedure 2-HEATING Mode Procedure 1-SELF-TEST ModeProcedure 3-HEATING MODE-TWO Stage Procedure 4-EMERGENCY Heat ModeProcedure 6-HEAT Pump Mode Procedure 5-COOLING ModeSingle-Speed Applications Two-Speed ApplicationsProcedure 8-COMPONENT Test Procedure 7-CONTINUOUS FAN ModeProcedure 10-DEHUMIDIFICATION Mode Procedure 9-BYPASS Humidifier ModeProcedure 2-SELECT Setup Switch Positions Procedure 11-ZONE ModeSTART-UP Procedures Procedure 1-GENERAL Setup Switches SW Air Conditioning A/C Airflow Switch PositionAIR Setup Allowable Furnace Model Setup Switch Position TonsProcedure 5-ADJUSTMENTS Procedure 3-PRIME Condensate Trap with WaterProcedure 4-PURGE GAS Lines Filling Condensate Trap Altitude Altitude AVG GAS Specific Gravity of Natural GASHeat Value United States Canada Redundant Automatic Gas Valve Set Temperature RiseSet Thermostat Heat Anticipator Altitude Derate Multiplier for U.S.AExample Altitude Percent Derate MultiplierCheck Pressure Switches Procedure 6-CHECK Safety ControlsGas Rate Cu Ft/Hr Check Primary Limit ControlAmp Draw Check with Ammeter Procedure 7-CHECKLISTCombustion and Vent Piping CHECKLIST-START-UP CHECKLIST-INSTALLATIONBook/Tab 1/6 Catalog No
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355MAV specifications

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