Bryant 355CAV installation instructions Set Gas Input Rate, Redundant Automatic Gas Valve

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355CAV

NOTE: Reference Fig. 52-59:

1.Heat pump MUST have a high pressure switch for dual fuel applications.

2.Refer to outdoor equipment Installation Instructions for additional information and setup procedure.

3.Select the “ZONE” position on the two-speed heat pump control.

4.Outdoor Air Temperature Sensor must be attached in all dual fuel applications.

5.Dip switch No.1 on Thermidistat should be set in OFF po- sition for air conditioner installations. This is factory de- fault.

6.Dip switch No. 1 on Thermidistat should be set in ON po- sition for heat pump installations.

7.Dip switch No. 2 on Thermidistat should be set in OFF position for single-speed compressor operation. This is factory default.

8.Dip switch No. 2 on Thermidistat should be set in ON po- sition for two-speed compressor operation.

9.Configuration Option No. 10 “Dual Fuel Selection” must be turned ON in all dual fuel applications.

10.NO connection should be made to the furnace HUM ter- minal when using a Thermidistat.

11.Optional connection. If wire is connected to W2 on fur- nace control board, either dip switch SW1-2 or SW4-2 on furnace control should be set in ON position to allow Thermidistat/Thermostat to control furnace at 2 stages Low/High or Medium/High.

12.Optional connection. If wire is connected, ACRDJ jumper on furnace control should be removed to allow Thermidis- tat/Thermostat to control outdoor unit staging.

13.Furnace must control its own staging operation via furnace control algorithm. This is factory default.

14.The RVS Sensing terminal “L” should not be connected. This is internally used to sense defrost operation.

15.DO NOT SELECT the “FURNACE INTERFACE” or “BALANCE POINT” option on the two-speed heat pump control board. This is controlled internally by the Thermi- distat/Dual Fuel Thermostat.

16.Dip switch D on Dual Fuel Thermostat should be set in OFF position for single-speed compressor operation. This is factory default.

17.Dip switch D on Dual Fuel Thermostat should be set in ON position for two-speed compressor operation.

Step 4 — Adjustments

Set Gas Input Rate

Furnace gas input rate on rating plate is for installations at altitudes up to 2000 ft. (609.6M).

In the USA., the input rating for altitudes above 2000 ft. (609.6M) must be reduced by 2 percent for each 1000 ft.

(304.8M) above sea level.

In Canada, the input rating must be derated by 5 percent for altitudes of 2000 ft. (609.6M) to 4500 ft. (1371.6M) above sea level.

Adjust manifold pressure to obtain input rate.

Furnace input rate must be within +2 percent of input rate on furnace rating plate.

1.Determine natural gas orifice size and manifold pressure for correct input.

a.Obtain average heat value (at installed altitude) from local gas supplier.

b.Obtain average specific gravity from local gas supplier.

c.Verify furnace model. Table 10 can only be used for mod- el 355CAV Furnaces.

d.Find installation altitude in Table 10.

NOTE: For Canadian altitudes of 2000 to 4500 ft. (609.6 to 1371.6M), use USA. altitudes of 2001 to 3000 ft. (609.6 to 914.4M) in Table 10.

e.Find closest natural gas heat value and specific gravity in Table 10.

f.Follow heat value and specific gravity lines to point of intersection to find orifice size and low-, medium-, and high-heat manifold pressure settings for proper opera- tion.

EXAMPLE: 0 - 2000 ft. (0 - 609.6M) altitude Heating value = 1050 Btu/cu ft.

Specific gravity = 0.62 Therefore: Orifice No. 45

Manifold pressure: 3.8-in. wc for high heat 1.6-in. wc for medium heat 0.6-in. wc for low heat

*Furnace is shipped with No. 45 orifices. In this example, all main burner orifices are the correct size and do not need to be changed to obtain proper input rate.

g.Check and verify burner orifice size in furnace. NEVER ASSUME ORIFICE SIZE; ALWAYS CHECK AND VERIFY.

2.Adjust manifold pressure to obtain input rate.

 

 

HIGH-HEAT

 

ON/OFF

ADJUSTMENT

 

(UNDER CAP)

 

SWITCH

 

BURNER

 

 

 

 

ENCLOSURE

INLET

 

REFFERENCE

 

TAP

PRESSURE

 

 

 

TAP

 

 

MEDIUM-HEAT ADJUSTMENT

(UNDER CAP)

LOW-HEAT

ADJUSTMENT

(UNDER CAP) MANIFOLD PRESSURE

TAP

A07280

Fig. 60 - Redundant Automatic Gas Valve

a. Remove burner enclosure front.

NOTE: Manifold pressure MUST always be measured with the burner box cover REMOVED.

b. Remove regulator seal caps that conceal adjustment screws for medium- and high-heat gas valve regulators. (See Fig. 60.)

c.Move setup switch SW4-2 on control center to ON posi- tion. (See Fig. 33.) This keeps furnace locked in medium- heat operation.

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Contents Installation Instructions Required Notice for Massachusetts Installations Table of Contents Safety ConsiderationsDimensions In. / mm Environmental Hazard355CAV Clearances to Combustibles Introduction Electrostatic Discharge ESD PrecautionsCodes and Standards Unit Damage HazardApplications Upflow ApplicationProperty Damage Hazard Condensate Trap Alternate Upflow Orientation Carbon Monoxide Poisoning HazardCondensate Trap Tubing Alternate Upflow Orientation Upper Inducer Housing Drain Connection Condensate Trap Field Drain AttachmentCondensate Trap Freeze Protection Downflow Applications Condensate Trap LocationHorizontal Left Tube Configuration Horizontal Left SUPPLY-AIR Discharge ApplicationsCombustion AIR Intake Vent Property Damage Construct a Working PlatformUnit Operation Hazard Horizontal Right SUPPLY-AIR Discharge Applications Condenste Trap Field Drain AttachmentProhibit Installation on Back LocationFire or Death Hazard Hazardous LocationsFIRE, EXPLOSION, Injury or Death Hazard Installation in Horizontal Applications InstallationInstallation in Upflow or Downflow Applications Leveling Legs If DesiredFurnace, Plenum, and Subbase Installed on a Angle AIR Ducts Fire Hazard FIRE, Carbon Monoxide and Poisoning HazardUnit MAY not Operate Gas Piping Fire or Explosion HazardRemoving Bottom Closure Panel Wiring Electrical Shock HazardDisconnect Switch and Furnace Electrical Shock and Fire HazardAccessories Fire or Electrical Shock HazardRemoval of Existing Furnaces from Common Vent Systems AIR for Combustion and Ventilation Fire and Explosion HazardCombustion-Air and Vent Pipe Diameter Pipe Fittings Cement Description Marked on PrimersFurnace Control Direct Vent Termination Clearance Ventilated Combustion Air Vent Termination Clearance Vent Pipe Termination for Ventilated Combustion Air System Combustion AIR Pipe Unit Corrosion HazardAttachment of Combustion Air Intake Housing Plug Fitting Combustion Air Termination Ventilated Combustion Air OptionCarbon Monoxide Poisoning Property Damage Hazard Vent PipeCombustion Air Termination-Direct Vent / 2-Pipe System Attachment of Vent Pipe304.8mm minimum 76.2mm minimum Vent Termination Kit Direct Vent / 2-Pipe System Only Vent TerminationExtended Exposed Sidewall Pipes Two-Pipe Termination Kit Direct Vent / 2-Pipe System OnlyWinter Design Maximum Allowable Pipe Length Ft M Number of 90 Elbows BtuhDirect Vent 2-Pipe Only Application Condensate DrainMulti-venting and Vent Terminations Personal Injury HazardContinuous Fan CF Setup Switches START-UP, Adjustment and Safety CheckAir Conditioning A/C Setup Switches Additional Setup Switches SW4Example of Setup Switch in Off Position Prime Condensate Trap with WaterWiring Diagram Inducer Housing Drain Tube Furnace Setup Switch DescriptionSequence of Operation Purge Gas LinesTwo-Stage Thermostat and Two-Stage Low / High Heating Two-Stage Thermostat and Two-Stage Medium/High HeatingThermidistat Mode Continuous Blower Speed Selection from Thermostat Super Dehumidify ModeContinuous Blower Mode Heat PumpStep-Modulating Furnace with Single-Speed Air Conditioning Pump Furnace and Two-Speed Air Conditioner Furnace and Two-Speed Heat PumpSet Gas Input Rate Redundant Automatic Gas ValveBurner Orifice Altitude AVG. GAS 675 Altitude Derate Multiplier for USA Burner FlameSet Temperature Rise Gas Rate cu Ft/HrSet Thermostat Heat Anticipator Check Pressure Switches ChecklistCheck Safety Controls Check Primary Limit ControlChecklist Installation Combustion and Vent PipingCatalog No. II355CAV---060---4
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355CAV specifications

The Bryant 355CAV is a state-of-the-art automated vertical machining center designed to enhance precision and efficiency in the manufacturing sector. Renowned for its robust construction, this machine is engineered to handle a broad spectrum of machining tasks, making it suitable for both small and large-scale production environments.

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In summary, the Bryant 355CAV is a versatile, high-performance machining center that showcases cutting-edge features and technologies. Its combination of user-friendly controls, sturdy construction, energy efficiency, and advanced monitoring positions it as a vital asset for manufacturers aiming to elevate their productivity and precision in an increasingly competitive landscape.
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