Bryant 345MAV instruction manual Ðmaximum Capacity of Pipe CU FT PER HR, Electrical Connections

Page 19

TABLE 2ÐMAXIMUM CAPACITY OF PIPE

(CU FT PER HR)*

NOMINAL

 

 

LENGTH OF PIPE (FT)

 

IRON

INTERNAL

 

 

 

 

 

 

 

 

PIPE

DIAMETER

 

 

 

 

 

 

 

 

 

 

 

 

SIZE

(IN.)

10

 

20

30

40

50

(IN.)

 

 

 

 

 

 

 

 

 

1/2

0.622

175

 

120

97

82

73

3/4

0.824

360

 

250

200

170

151

1

1.049

680

 

465

375

320

285

1-1/4

1.380

1400

 

950

770

660

580

1-1/2

1.610

2100

 

1460

1180

990

900

 

 

 

 

 

 

 

 

CAUTION: If a flexible connector is required or al- lowed by authority having jurisdiction, black iron pipe shall be installed at gas valve and extend a minimum of 2 in. outside furnace casing.

An accessible manual shutoff valve MUST be installed upstream of furnace gas controls and within 6 ft of furnace. A 1/8-in. NPT plugged tapping, accessible for test gage connection, MUST be installed immediately upstream of gas supply connection to furnace and downstream of manual shutoff valve.

*For gas pressures of 0.5 psig (14-in. wc) or less, and a pressure drop of 0.5-in. wc (based on a 0.60 specific gravity gas). Ref: Table 10-2 NFGC .

GAS

SUPPLY

MANUAL

SHUTOFF

VALVE (REQUIRED)

SEDIMENT

TRAP

UNION

A93324

Fig. 23ÐTypical Gas Pipe Arrangement

NOTE: The gas valve inlet press tap connection is suitable to use as test gage connection providing test pressure DOES NOT exceed maximum 0.5 psig (14-in. wc) stated on gas valve. (See Fig. 40.) Piping should be pressure tested in accordance with local and national plumbing and gas codes before furnace is attached. In Canada, refer to current edition of NSCNGPIC. If pressure exceeds 0.5 psig (14-in. wc), gas supply pipe must be disconnected from furnace and capped before pressure test. If test pressure is equal to or less than 0.5 psig (14-in. wc), turn off electric shutoff switch located on gas valve before test. It is recommended that ground joint union be loosened before pressure testing. After all connections have been made, purge lines and check for leakage.

ELECTRICAL CONNECTIONS

See Fig. 24 for field wiring diagram showing typical field 115-v and 24-v wiring. Check all factory and field electrical connections for tightness.

WARNING: Blower access panel door switch opens 115-v power to control center. No component operation can occur. Do not bypass or close switch with panel removed. Failure to follow this warning could result in personal injury or death.

FIELD 24-V WIRING

FIELD 115-, 208/230-, 460-V WIRING

FACTORY 24-V WIRING

FACTORY 115-V WIRING

 

 

 

NOTE 2

 

 

 

THERMOSTAT

 

 

 

FIVE

 

W C R

G

Y

FIELD-SUPPLIED

 

 

 

TERMINALS

 

 

 

 

 

 

 

 

WIRE

 

 

 

 

 

DISCONNECT

 

 

THREE-WIRE

 

 

 

 

 

208/230- OR

 

 

HEATING-

 

 

 

 

 

 

 

ONLY

 

 

 

 

 

460-V

 

 

 

 

 

 

 

 

THREE

BLK

BLK

 

W

 

 

 

 

PHASE

 

 

 

 

 

 

 

 

 

 

 

 

 

WHT

WHT

 

R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230-V

 

GND

GND

 

 

 

 

 

SINGLE

 

115-V

AUXILIARY

G

 

 

 

 

PHASE

 

 

 

 

 

 

 

FIELD-SUPPLIED

J-BOX

C

NOTE 1

 

 

 

GND

DISCONNECT

CONTROL

Y

 

 

CONDENSING

 

 

BOX

 

 

 

UNIT

 

 

 

 

 

 

 

 

 

 

 

 

24-V

 

 

 

TWO

 

 

 

TERMINAL

 

 

 

WIRE

 

 

 

 

BLOCK

NOTES: 1.

Connect Y-terminal as shown for proper operation.

 

 

FURNACE

 

 

 

2.￿ Some thermostats require a "C" terminal connection as shown.

 

 

 

 

 

3.If any of the original wire, as supplied, must be replaced, use same type or equivalent wire.

A98209

Fig. 24ÐHeating and Cooling Application Wiring Diagram

Ð19Ð

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Contents Ð1Ð Electrostatic Discharge ESD PrecautionsUnit Size Dimensions→ ÐDimensional Drawing Ð2Ð→ ÐClearances to Combustibles Safety ConsiderationsElectrostatic Discharge ESD Precautions Minimum Inches Clearance to Combustible ConstructionCondensate Trap Location Factory-Shipped Orientation IntroductionApplications General II. Upflow ApplicationsCondensate Trap Location Alternate Upflow Orientation Ð5ÐÐ6Ð Pressure Switch TubingCondensate Trap Field Drain Attachment Condensate Trap Tubing Condensate Trap Freeze ProtectionIII. Downflow Applications Condensate Trap LocationÐ8Ð IV. Horizontal Left SUPPLY-AIR Discharge ApplicationsConstruct a Working Platform Horizontal Right SUPPLY-AIR Discharge ApplicationsÐ9Ð ÐAttic Location and Working Platform Front Upflow or Downflow Horizontal II. Furnace Location Relative to Cooling Equipment III. Confined Space III. Hazardous LocationsAIR for Combustion and Ventilation General II. Unconfined SpaceCombustion AIR from Outdoors Through Vertical Ducts Installation Leveling Legs if DesiredCombustion AIR from Outdoors Through Horizontal Ducts Opening Dimensions II. Installation on a Concrete SlabFurnace Casing Width Ductwork acoustical treatment IV. Installation in Horizontal ApplicationsAIR Ducts General RequirementsVII. Bottom Closure Panel Return Air ConnectionsVI. Filter Arrangement Ðfilter Information171⁄2-IN. Wide Casings only VIII. GAS PipingElectrical Connections Ðmaximum Capacity of Pipe CU FT PER HRNominal Length of Pipe FT Iron Internal Diameter Size Amps Size WiringLength FT³ CKT BKR Amps Phase Ðelectrical DataÐWiring Diagram Removal of Existing Furnaces from Common Vent Systems II -V WiringIII. Accessories VentingGeneral II. COMBUSTION-AIR and Vent PipingCombustion Air Pipe ÐCombustion-Air Inlet Pipe Assembly 3001 to Ðmaximum Allowable Vent Pipe Length FT4001 to 5000² 7001 to 8000² Ðmaximum Allowable Vent Pipe Length FT5001 to 6000² 6001 to 7000²9001 to 10,000² ÐShort Vent 5 to 8 Ft System040 060 080 100 120 Vent Extension PipeÐvent Pipe Termination Clearances III. Vent TerminationIV. Multiventing Condensate Drain GeneralÐRoof Termination Preferred IV. Heat Pump Mode Heating ModeII. Cooling Mode III. Continuous Blower ModeII. Prime Condensate Trap with Water START-UP Procedures GeneralComponent Test Component Test SequenceSet Gas Input Rate → ÐInducer Housing Drain TubeIV. Adjustments III. Purge GAS LinesAltitude BTU/CU FTOnly 5001 Only4001 5000Only 8001 7001775 8000Example Ðaltitude Derate Multiplier for U.S.AAltitude Derate Multiplier Factor for U.S.A ±SPEED Selector Set Temperature RiseBlower Off Delay Heat Mode Ðgas Rate CU FT/HRII. Check Pressure Switch Check Safety Controls Check Primary Limit ControlChecklist Vent Piping ChecklistðinstallationCHECKLISTÐSTART-UP Load Calculation
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345MAV specifications

The Bryant 345MAV is a premier choice in the realm of residential heating and cooling systems, encapsulating advanced technologies, high efficiency, and remarkable performance. Designed for homeowners seeking reliability and comfort, this model exemplifies modern HVAC (Heating, Ventilation, and Air Conditioning) innovations.

One standout feature of the Bryant 345MAV is its impressive energy efficiency. With a high SEER (Seasonal Energy Efficiency Ratio) rating, it operates at peak levels while consuming less energy. This not only reduces utility bills but also supports environmental sustainability, making it an ideal selection for eco-conscious consumers. The model employs variable-speed technology, which allows the system to adjust its output based on current heating and cooling needs. As a result, it provides consistent indoor comfort while minimizing temperature fluctuations.

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Comfort also extends to the user experience with the inclusion of a smart thermostat option. This integration allows homeowners to manage their heating and cooling systems remotely, enhancing convenience and control. Programmable settings can optimize energy use based on individual schedules, facilitating both comfort and savings.

In summary, the Bryant 345MAV is a top-tier solution for residential climate control, blending energy efficiency, innovative technology, and unmatched reliability. With its variable-speed operation, environmentally friendly refrigerant, and smart features, the 345MAV represents a significant advancement in the HVAC field. Homeowners investing in this model can expect a system that not only meets their heating and cooling needs but exceeds them in terms of efficiency and comfort.
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