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355CAV installation instructions Crawlspace Termination, 304.8mm minimum, 3” 76.2mm minimum
Models:
355CAV
1
36
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Install
Wiring Diagram
Dimension
Horizontal Left Tube Configuration
vWiring
Select Setup Switch Positions
Adjustments
Checklist
Return-AirTemperature
Electrostatic Discharge Esd Precautions
Page 36
Image 36
355CAV
3” (76.2mm) minimum
(304.8mm) minimum
A06674
Fig. 43 - Crawlspace Termination
36
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Image 36
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Contents
TABLE OF CONTENTS
Fig. 1 - Furnace Orientation
FURNACE RELIABILITY HAZARD
Installation Instructions
Required Notice for Massachusetts Installations
SAFETY CONSIDERATIONS
355CAV
CUT HAZARD
FURNACE RELIABILITY HAZARD
Dimensions In. / mm
Fig. 2 - Dimensional Drawing
355CAV
Fig. 3 - Clearances to Combustibles
INSTALLATION
355CAV
Fig. 4 - Return-AirTemperature
Fig. 5 - Installation in a Garage
Safety
General Installation
ELECTROSTATIC DISCHARGE ESD PRECAUTIONS
INTRODUCTION
APPLICATIONS
UPFLOW APPLICATION
Fig. 6 - Condensate Trap
Condensate Trap Alternate Upflow Orientation
CARBON MONOXIDE POISONING HAZARD
355CAV
Pressure Switch Tubing
Upper Inducer Housing Drain Connection
Condensate Trap Field Drain Attachment
Fig. 8 - Alternate Trap Location
DOWNFLOW APPLICATIONS
Fig. 9 - Condensate Trap
Condensate Trap Location
Condensate Trap Tubing
Fig. 11 - Horizontal Left Tube Configuration
HORIZONTAL LEFT SUPPLY-AIRDISCHARGE APPLICATIONS
Pressure Switch Tubing
355CAV
Vent 2-PipeApplication
PROPERTY DAMAGE
Pressure Switch Tubing
355CAV
Fig. 14 - Horizontal Right Tube Configuration
HORIZONTAL RIGHT SUPPLY-AIRDISCHARGE APPLICATIONS
Construct a Working Platform
UNIT OPERATION HAZARD
LOCATION
Condenste Trap Field Drain Attachment
Pressure Switch Tubing
355CAV
Fig. 16 - Prohibit Installation on Back
FIRE OR DEATH HAZARD
Fig. 17 - Freeze Protection
Furnace Location Relative to Cooling Equipment
INSTALLATION
Installation in Upflow or Downflow Applications
Installation in Horizontal Applications
Hazardous Locations
Fig. 22 - Duct Flanges
Combustible Floor
Installed on a Combustible Floor
355CAV
355CAV
AIR DUCTS
General Requirements
Ductwork Acoustical Treatment
Supply Air Connections Upflow Furnaces
Return Air Connections
FIRE HAZARD
Upflow Furnaces
Downflow and Horizontal Furnaces
Fig. 24 - Filter Installed for Side Inlet
Bottom Closure Panel
Gas Piping
FIRE OR EXPLOSION HAZARD
Fig. 26 - Removing Bottom Closure Panel
Fig. 27 - Typical Gas Pipe Arrangement
Fig. 28 - Casing Pipe Grommets
355CAV
115-vWiring
Table 3 - Maximum Capacity of Pipe
ELECTRICAL SHOCK HAZARD
355CAV
Fig. 30 - Disconnect Switch and Furnace
Table 4 - Electrical Data
ELECTRICAL SHOCK AND FIRE HAZARD
355CAV
Factory Installed J-BoxLocation
24-vwiring
Fig. 31 - Factory Installed J-BoxLocation
Accessories
AIR FOR COMBUSTION AND VENTILATION
Combustion-Airand Vent Pipe Systems
Direct Vent / 2-PipeSystem
Ventilated Combustion Air Option Materials
ASTM
MATERIAL
PIPE
FITTINGS
Fig. 33 - Furnace Control
355CAV
Fig. 34 - Direct Vent Termination Clearance
355CAV
A06675
355CAV
A05013
355CAV
A05090
A05091
Location and Elbow Configuration
COMBUSTION AIR PIPE
Fig. 38 - Combustion Air and Vent Pipe Transition
UNIT CORROSION HAZARD
Fig. 40 - Intake Housing Plug Fitting Drain
355CAV
UNIT CORROSION HAZARD
CARBON MONOXIDE POISONING HAZARD
VENT PIPE
CARBON MONOXIDE POISONING AND
Attachment of Vent Pipe
355CAV
304.8mm minimum
76.2 mm minimum 304.8 mm minimum
Fig. 41 - Attic Termination
Fig. 42 - Crawlspace Termination
Fig. 43 - Crawlspace Termination
304.8mm minimum
355CAV
3” 76.2mm minimum
VENT TERMINATION
Extended Exposed Sidewall Pipes
355CAV
General
5.Check required dimensions as shown
355CAV
Winter Design Temperature Ambient
355CAV
Table 7 - Maximum Allowable Pipe Length Ft / M
355CAV
UNIT SIZE
CONDENSATE DRAIN
DIRECT VENT 2 PIPE TERMINATION
TERMINATION SYSTEM
DIAMETER OF COMBUSTION AIR
START-UP,ADJUSTMENT AND SAFETY CHECK
Step 2 - Select Setup Switch Positions
Air Conditioning A/C Setup Switches
Continuous Fan CF Setup Switches
Fig. 48 - Example of Setup Switch in Off Position
Prime Condensate Trap with Water
355CAV
UNIT OPERATION HAZARD
Fig. 49 - Wiring Diagram
355CAV
A06677
Fig. 50 - Inducer Housing Drain Tube
Table 9 - Furnace Setup Switch Description
Fig. 51 - Filling Condensate Trap
355CAV
Step 3 - Sequence of Operation
Purge Gas Lines
Single-StageThermostat and Step-ModulatingHeating
Adaptive Mode
Two-StageThermostat and Two-StageMedium/High
Heating
355CAV
Cooling Mode
Thermidistat Mode
355CAV
Super Dehumidify Mode
Continuous Blower Mode
Continuous Blower Speed Selection from Thermostat
Heat Pump
Conditioning
Conditioner
Pump Dual Fuel
355CAV
Pump
Furnace and Two-SpeedAir Conditioner
Furnace and Two-SpeedHeat Pump
355CAV
Step 4 - Adjustments
Set Gas Input Rate
Fig. 60 - Redundant Automatic Gas Valve
355CAV
Fig. 61 - Burner Orifice
355CAV
UNIT DAMAGE HAZARD
Derated 2% / 1000 Ft. Above Sea Level
355CAV
355CAV
Derated 2% / 1000 Ft. Above Sea Level
Table 11 - Altitude Derate Multiplier for U.S.A
Fig. 62 - Burner Flame
355CAV
UNIT DAMAGE HAZARD
Set Temperature Rise
Table 12 - Gas Rate cu Ft/Hr
Set Thermostat Heat Anticipator
355CAV
CHECKLIST
Check Safety Controls
Check Pressure Switches
Check Primary Limit Control
CHECKLIST - INSTALLATION
Safety Controls Check Operation
CHECKLIST --- START---UP
355CAV