Bryant 345MAV instruction manual ÐWiring Diagram

Page 21

Ð21Ð

PCB SEE NOTE #10

 

 

SW2

 

 

G

 

 

(WHEN USED)

 

TO 115VAC FIELD DISCONNECT

 

 

 

 

 

SCHEMATIC DIAGRAM

 

 

 

 

 

 

 

NOTE #4

 

 

 

 

 

 

 

 

 

 

 

 

BLOWER

 

 

 

PRS

 

LGPS

 

 

NEUTRAL

 

 

 

 

 

 

(NATURAL GAS & PROPANE)

 

 

 

 

R

 

 

 

 

L1

 

 

 

 

 

 

 

OFF

 

 

 

 

ORN

 

 

 

 

 

 

GND

EQUIPMENT GROUND

 

 

 

 

 

 

 

DELAY

 

 

 

 

Y

 

 

 

 

 

 

 

 

 

 

 

 

(NOT ON ALL MODELS)

SW1

 

 

W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L2

 

 

 

 

 

 

 

 

 

 

 

 

 

COM

 

 

 

 

 

 

ILK

 

 

 

 

 

 

 

 

LO

 

 

 

BLOWER OFF DELAY

 

 

 

 

 

 

HUM

 

 

 

 

 

 

 

 

 

 

SPARE-2

 

 

 

 

 

 

SELECTION CHART

 

TEST/TWIN

 

 

 

 

 

NOTE #6

 

 

 

 

 

 

 

 

MED LO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YEL

 

 

 

 

 

HEAT

 

 

MED HI

 

 

 

 

 

 

 

90

SEC

 

 

 

 

 

 

LED

 

 

 

L1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLU

 

 

 

 

 

SPARE-1

 

HI

 

START

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OL

 

 

 

 

 

135 SEC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLWR

 

HI/LO

 

NOTE #8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RED

RED

 

 

1-M

3-P

 

 

 

COOL

 

 

 

 

CAP-1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COM

 

 

 

 

 

 

180 SEC

 

PL1

3

2

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LS

FRS

 

 

 

 

 

 

 

COM

 

 

 

 

 

 

 

 

 

 

 

 

GV

 

 

 

 

 

 

 

 

 

 

BLWM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHT

 

 

 

 

 

 

 

EAC-1

 

 

 

 

 

 

 

 

 

 

 

225 SEC

 

WHT

 

6 5

4

 

 

FSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2-C

 

HSIR

 

EAC-2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

8 7

 

 

 

 

RED

GRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GVR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

1

HSI

 

 

 

 

 

 

 

 

 

 

SEC-1

SEC-2

 

 

 

 

 

NOTE #5

 

 

 

 

 

 

 

 

 

IDM

 

 

 

 

 

 

 

 

 

BLU

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TRAN

 

 

 

 

 

 

PL2

2

PL5

2

 

 

 

OL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HI/LO

 

 

 

 

 

 

RED

WHT

 

 

IDR

 

 

 

 

 

 

 

 

 

M

AUX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RELAY

 

24 VAC-3A

 

 

 

 

WHT (COM)

 

 

 

PR1

115VAC

 

PR2

 

1

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FU1

FUSE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

3

BRN

 

 

 

 

 

 

 

 

 

BLK (HI)

 

 

 

 

 

 

 

TRAN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PL3

 

PL4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OL

 

 

 

 

 

 

 

 

 

 

 

 

 

CAP -2

 

 

 

 

 

 

 

 

 

COOL

SPARE-1

 

 

 

 

 

 

 

 

 

 

24VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HSIR

 

IDR

BLWR

 

BLOWER

 

 

 

 

YEL (MED HI)

 

 

 

 

 

 

 

 

 

 

 

 

 

2

2

 

 

 

 

SPEED

 

 

 

 

 

NOTE #8

START

 

CAP -1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SELECT

 

 

 

 

 

 

 

 

 

TEST/TWIN

 

NOTE #7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HEAT

 

SPARE-2

 

 

 

 

 

 

FU1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLU (MED LO)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PL3

L2

 

EAC-1

AMP

 

BRN

 

 

 

 

 

 

SEC-1

SEC-2

 

FRS

 

 

LS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE #12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PL2

 

 

 

 

 

RED

(LO)

BLWM

 

 

 

 

 

GVR-2

 

 

 

 

 

 

 

 

120

VAC

 

 

 

1

 

 

 

 

 

1.5

 

 

 

HUM

 

 

 

 

 

 

7

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

EAC-2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L1

PR1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

3

PR2

 

 

COM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHT (COM)

 

 

 

 

 

 

 

 

 

 

 

 

LGPS

(WHEN USED)

 

 

 

 

 

 

 

 

WHT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

GRN

WHT

 

 

 

 

 

 

WHT

 

 

 

 

W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLK

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

BLK

BLK

BLK

 

WHT

 

CAP -2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2 3 PL4

 

 

 

 

 

FUSED DISCONNECT

 

 

HSIR

BLWR

HI/LO

 

 

 

 

NOTE #6

 

 

 

 

 

 

 

 

 

 

 

 

 

PL1

 

 

 

 

 

 

PL5

 

 

BRN

 

 

BRN

 

 

JB

SWITCH (WHEN REQ'D)

 

 

 

IDR

 

 

 

GVR

 

PRS

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE #4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHT

 

M

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IDM

 

ILK

 

WHT

 

NEUTRAL

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

GRN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AUX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HSI

 

 

 

BLK

 

 

 

OL

 

 

 

 

BLK

FU2

L1

 

 

 

 

 

 

GVR-1

 

3-P

 

GV

 

 

 

 

 

 

 

 

 

 

 

 

 

GRN

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CPU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2-C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GRN

 

 

 

 

 

 

 

 

 

 

1-M

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

 

 

Y

 

 

 

 

 

 

 

 

8

 

 

NOTE #5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

PL1

9-CIRCUIT CONNECTOR

 

G

5

 

 

PL2

2-CIRCUIT PCB CONNECTOR

 

 

BLWR

BLOWER MOTOR RELAY, SPST-(N.O.)

 

 

FSE

BLWM

BLOWER MOTOR

PL3

3-CIRCUIT IDM CONNECTOR

 

 

6

CAP

CAPACITOR

PL4

3-CIRCUIT IDM EXTENSION CONNECTOR

 

COM

 

CPU

MICROPROCESSOR AND CIRCUITRY

PL5

2-CIRCUIT HSI/PCB CONNECTOR

 

 

EAC-1

ELECTRONIC AIR CLEANER CONNECTION (115 VAC 1.5 AMP MAX.)

PRS

PRESSURE SWITCH, SPST-(N.O.)

NOTES:

9

EAC-2

ELECTRONIC AIR CLEANER CONNECTION (COMMON)

SW1 & 2

BLOWER OFF DELAY

 

FRS

FLAME ROLLOUT SW. -MANUAL RESET, SPST-(N.C.)

TEST/TWIN

COMPONENT TEST & TWIN TERMINAL

1.

IF ANY OF THE ORIGINAL EQUIPMENT WIRE IS REPLACED USE WIRE RATED FOR 105˚C.

FSE

FLAME PROVING ELECTRODE

TRAN

TRANSFORMER-115VAC/24VAC

FU1

FUSE, 3 AMP, AUTOMOTIVE BLADE TYPE, FACTORY INSTALLED

2.

INDUCER (IDM) AND BLOWER (BLWM) MOTORS CONTAIN INTERNAL

 

 

FU2

FUSE OR CIRCUIT BREAKER CURRENT INTERRUPT DEVICE

 

JUNCTION

 

AUTO-RESET THERMAL OVERLOAD SWITCHES (OL).

 

 

(FIELD INSTALLED & SUPPLIED)

 

UNMARKED TERMINAL

3.

BLOWER MOTOR SPEED SELECTIONS ARE FOR AVERAGE CONDITIONS, SEE INSTALLATION

GND

EQUIPMENT GROUND

 

 

INSTRUCTIONS FOR DETAILS ON OPTIMUM SPEED SELECTION.

 

PCB TERMINAL

 

GV

GAS VALVE-REDUNDANT OPERATORS

 

4.

USE ONLY COPPER WIRE BETWEEN THE DISCONNECT SWITCH AND THE

GVR

GAS VALVE RELAY, DPST-(N.O.)

 

FACTORY WIRING (115VAC)

 

FURNACE JUNCTION BOX (JB).

 

HI/LO

BLOWER MOTOR SPEED CHANGE RELAY, SPDT

 

FACTORY WIRING (24VAC)

5.

THIS WIRE MUST BE CONNECTED TO FURNACE SHEETMETAL FOR CONTROL TO PROVE

HSI

HOT SURFACE IGNITOR (115 VAC)

 

 

FLAME.

 

 

FIELD WIRING (115VAC)

 

 

HSIR

HOT SURFACE IGNITOR RELAY, SPST-(N.O.)

 

6.

FACTORY CONNECTED WHEN LGPS NOT USED.

 

HUM

24VAC HUMIDIFIER CONNECTION (.5 AMP. MAX.)

 

FIELD WIRING (24VAC)

7.

REPLACE ONLY WITH A 3 AMP FUSE.

 

IDM

INDUCED DRAFT MOTOR

 

 

 

CONDUCTOR ON PCB

8.

YELLOW LEAD NOT ON ALL MOTORS.

 

IDR

INDUCED DRAFT RELAY, SPST-(N.O.)

 

 

 

 

9.

BLOWER-ON DELAY, GAS HEATING 60 SECONDS, COOLING OR HEAT PUMP 2 SECONDS.

ILK

BLOWER ACCESS PANEL INTERLOCK SWITCH, SPST-(N.O.)

 

FIELD WIRING TERMINAL

 

10.

BLOWER-OFF DELAY, GAS HEATING 90, 135, 180 OR 225 SECONDS, COOLING OR

JB

JUNCTION BOX

 

FIELD EARTH GROUND

 

 

HEAT PUMP 90 SECONDS. (135 SECONDS ONLY ON SOME MODELS)

LED

LIGHT-EMITTING DIODE FOR STATUS CODES

 

 

 

EQUIPMENT GROUND

11.

IGNITION-LOCKOUT WILL OCCUR AFTER FOUR CONSECUTIVE UNSUCCESSFUL

LGPS

LOW GAS PRESSURE SWITCH, SPST-(N.O.)

 

LS

LIMIT SWITCH, AUTO RESET, SPST(N.C.)

 

FIELD SPLICE

 

TRIALS-FOR-IGNITION. CONTROL WILL AUTO-RESET AFTER THREE HOURS.

 

12.

SOME MODELS MAY HAVE SPADE QUICK CONNECT TERMINALS.

OL

AUTO-RESET INTERNAL MOTOR OVERLOAD TEMP. SW.

 

PLUG RECEPTACLE

PCB

PRINTED CIRCUIT BOARD

 

 

 

322854-101 REV. D (LIT)

 

 

 

 

Fig. 26ÐWiring Diagram

A99106

Image 21
Contents Ð1Ð Electrostatic Discharge ESD Precautions→ ÐDimensional Drawing DimensionsÐ2Ð Unit SizeElectrostatic Discharge ESD Precautions Safety ConsiderationsMinimum Inches Clearance to Combustible Construction → ÐClearances to CombustiblesApplications General IntroductionII. Upflow Applications Condensate Trap Location Factory-Shipped OrientationCondensate Trap Location Alternate Upflow Orientation Ð5ÐPressure Switch Tubing Ð6ÐCondensate Trap Field Drain Attachment III. Downflow Applications Condensate Trap Freeze ProtectionCondensate Trap Location Condensate Trap TubingÐ8Ð IV. Horizontal Left SUPPLY-AIR Discharge ApplicationsHorizontal Right SUPPLY-AIR Discharge Applications Construct a Working PlatformÐ9Ð ÐAttic Location and Working Platform Front Upflow or Downflow Horizontal II. Furnace Location Relative to Cooling Equipment AIR for Combustion and Ventilation General III. Hazardous LocationsII. Unconfined Space III. Confined SpaceInstallation Leveling Legs if Desired Combustion AIR from Outdoors Through Vertical DuctsCombustion AIR from Outdoors Through Horizontal Ducts II. Installation on a Concrete Slab Opening DimensionsFurnace Casing Width AIR Ducts IV. Installation in Horizontal ApplicationsGeneral Requirements Ductwork acoustical treatmentVI. Filter Arrangement Return Air ConnectionsÐfilter Information VII. Bottom Closure Panel171⁄2-IN. Wide Casings only VIII. GAS PipingÐmaximum Capacity of Pipe CU FT PER HR Electrical ConnectionsNominal Length of Pipe FT Iron Internal Diameter Size Length FT³ CKT BKR Amps Phase WiringÐelectrical Data Amps SizeÐWiring Diagram III. Accessories II -V WiringVenting Removal of Existing Furnaces from Common Vent SystemsII. COMBUSTION-AIR and Vent Piping GeneralCombustion Air Pipe ÐCombustion-Air Inlet Pipe Assembly Ðmaximum Allowable Vent Pipe Length FT 3001 to4001 to 5000² 5001 to 6000² Ðmaximum Allowable Vent Pipe Length FT6001 to 7000² 7001 to 8000²9001 to 10,000² ÐShort Vent 5 to 8 Ft System040 060 080 100 120 Vent Extension PipeIV. Multiventing III. Vent TerminationCondensate Drain General Ðvent Pipe Termination ClearancesÐRoof Termination Preferred II. Cooling Mode Heating ModeIII. Continuous Blower Mode IV. Heat Pump ModeComponent Test START-UP Procedures GeneralComponent Test Sequence II. Prime Condensate Trap with WaterIV. Adjustments → ÐInducer Housing Drain TubeIII. Purge GAS Lines Set Gas Input RateAltitude BTU/CU FT4001 Only5000 Only 5001775 70018000 Only 8001Ðaltitude Derate Multiplier for U.S.A ExampleAltitude Derate Multiplier Factor for U.S.A Blower Off Delay Heat Mode Set Temperature RiseÐgas Rate CU FT/HR ±SPEED SelectorCheck Safety Controls Check Primary Limit Control II. Check Pressure SwitchChecklist CHECKLISTÐSTART-UP ChecklistðinstallationLoad Calculation Vent Piping
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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.

The Bryant 345MAV incorporates advanced refrigerant technologies designed for optimal performance. It uses R-410A refrigerant, which is known for its lower environmental impact compared to traditional refrigerants like R-22. This environmentally friendly aspect aligns with regulations aimed at reducing ozone depletion, thereby promoting a greener approach to heating and cooling.

Reliability is another hallmark of the Bryant 345MAV. Engineered with precision, this model features a durable build designed to withstand varying weather conditions. The system is equipped with a robust compressor that is engineered for longevity and minimal noise during operation. Homeowners will appreciate the quiet performance of the 345MAV, ensuring peace in their living spaces.

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.