Thomas & Betts UDAS Check Installation and Startup, Operating Instructions Operating Sequence

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24.Check Installation and Startup

Check the installation prior to startup:

Heater

Startup:

Operating

Instructions and

Operating Sequence

οCheck to be sure that all screws used to hold shipping brackets were re- installed in the heater cabinet.

οCheck suspension. Unit must be secure and level.

οCheck clearances from combustibles. Requirements are in Paragraph 8.

οCheck vent system to be sure that it is installed according to the instructions in the appropriate Vent Installation Manual as listed in Paragraph 1.

οCheck piping for leaks and proper gas line pressure. Bleed gas lines of trapped air. See Paragraph 12.

οCheck electrical wiring. Be sure all wire gauges are as recommended. A service disconnect switch should be used. Verify that fusing or circuit break- ers are adequate for the load use.

οCheck polarity. Verify that line voltage exists between the black “L1” and earth ground.

οIf installed in California, verify that California Warning Label is displayed

WARNINGS: For your safety, read before operating. If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury, or loss of life.

•This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand.

•Before operating, smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

WHAT TO DO IF YOU SMELL GAS

•Do not try to light any appliance.

•Do not touch any electrical switch; do not use any phone in your building.

•Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.

•If you cannot reach your gas supplier, call your fire department.

•Use only your hand to turn the gas control ON/OFF knob on the gas valve. Never use tools. If the valve ON/OFF knob will not turn by hand, do not try to repair it. Call a qualified service technician. Force or attempted repair may result in a fire or explosion.

•Should overheating occur, or the gas supply fail to shut off, turn off the manual gas valve to the appliance before shutting off the electrical supply.

•Do not use this appliance if any part has been under water. Imme- diately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water.

1.Set thermostat at lowest setting.

2.Turn off all electric power to the appliance.

3.This appliance is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand. Open the access door and locate the gas control (ON/OFF) knob on the gas valve. (See FIGURE 16.)

Form RZ-NA I-UDA, P/N 195673 Rev 5, Page 26

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Contents Table of Contents Series Fan-Type Unit HeatersHazard Levels of Warnings in this Manual Installation CodesGeneral Venting Manual by ModelWarranty Uncrating and Preparation Massachusetts RequirementDimensions SizeModel Udas Separated Combustion Fan Technical Data Size 100 125High Altitude Operation Instructions for Changing Pressure SwitchPressure Switch ClearancesCombustion Air applies to Model Udap and Model Model Udap and Model UDAP-CVLocation Recommendations Unit Heater LocationHeater Throw Model Udap Size 100 125 150 175 225 250 300 350 400 Unit Heater Location cont’dHanging the Heater Model Udas Size 100 125 150 175 225 250 300 350 400Be sure Threaded swivel Connectors areRecommended maximum hanger rod length is 6 feet 1.8M Locked toGas Connection Size Gas Piping and PressuresSizing Gas Supply Line Instructions Instructions for High Altitude Derate Manifold Pressure Settings by Altitude for CanadaGas Piping and Pressures cont’d Two -Stage ValveHigh Altitude Capacity Changes Feet MetersBurner Electrical Supply and Connections Thermostat and ConnectionsCombustion Air Proving Switch Pressure Switch Limit Control Pressure Switch SettingsCombustion Air Proving Normal Heat Cycle Operating Sequence Door Switch Model Udas only Ignition SystemDip Switch StatusLED LightsIgnition System cont’d SW1 SW2 TimeContinuous Fan Operation Fault Modes Fault Modes cont’d Lockout Gas Valve Fan MotorWiring Diagrams Operating SequenceWiring Diagrams cont’d SW1 Operating Instructions Operating Sequence Check Installation and StartupCheck the installation prior to startup Heater Startup Check installation after startup Vent System Testing Procedure Model UdapUse only factory-authorized parts Maintenance ScheduleStartup cont’d Heat Exchanger Maintenance Burner Maintenance Burner Removal Instructions Refer to FigureInstructions to Re-Install the Burner Refer to Figure Burner Maintenance cont’dInspect and Clean the Burner Re-Install the Burner Burner OrificeDSI Cont’d IgnitionSystem Fan BladesOperating Gas Valve Combustion Air Pressure SwitchDoor Switch Udas onlyAir System Troubleshooting Flame Rollout Switch Sizes 30-125 onlySwitch DisconnectWill not start General TroubleshootingVenter motor Burner willTroubleshooting cont’d Cont’d

UDAP, UDAS specifications

Thomas & Betts is a well-respected name in the electrical and industrial products sector, known for its innovation and quality. Among its impressive portfolio, the UDAS and UDAP series of connectors stand out for their reliable performance and advanced features. These connectors are specifically designed to meet the rigorous demands of electrical applications in various industries.

The UDAS (Universal Disconnect Appliance Switch) and UDAP (Universal Disconnect Appliance Plug) are engineered for high-capacity applications where safety, efficiency, and ease of use are paramount. One of the main features of these connectors is their ability to deliver increased electrical resistance and durability. They are constructed from high-quality materials that can withstand extreme environmental conditions, making them ideal for outdoor and harsh industrial applications.

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