Manuals / Thomas & Betts / Household Appliance / Fan

Thomas & Betts UDAP, UDAS Ignition System, Location of Controls, DSI Integrated Control Module

Models: UDAP UDAS

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FIGURE 18 - Location of Controls

FIGURE 18 - Location of Controls
	Flame Sensor		Venter Motor (Size 30-75
Flame Rollout Switch	Pressure Switch	High Temperature	illustrated. Venter motor
(Sizes 30-125)	- Sizes 30-125	Limit Control	is in the same location for
			all models, but appear-
			ance is different.)
			Model UDAS has a
			collar for combustion
			air pipe (not illustrated)

Burner Assembly

Gas Valve

Interlock Door

Switch - UDAS only

Fan

Motor

Terminal

Board (24V)

Disconnect Switch - UDAS only

				Electrical Box - UDAS only
Ignitor			Transformer	Remove cover to connect
Ignitor			Transformer	supply and access
		Control Panel Assy		disconnect switch wires .
Transformer		Control Panel Assy		Always replace cover.
		located on the		Always replace cover.
				Pressure Switch

		Control Compartment
		Bottom		(Sizes 150-400)
		Sizes 30-125		Venter Motor
		Sizes 150-400		Venter Motor
		Sizes 150-400		Capacitor
				Capacitor
Circuit Board	Optional		Circuit Board	Fan Motor
(DSI Integrated	Optional		(DSI Integrated	Fan Motor
Control Module)	Fan Motor		Control Module)	Capacitor
	Capacitor

29.Ignition System

DSI Integrated Control Module (circuit board) - See FIGURE 19. The module monitors the operation of the heater including ignition. The only replaceable com- ponent is the 3 amp Type ATC or ATO fuse. If the fuse is blown, the problem is most likely an external overload. Correct the problem and replace the fuse.

Do not attempt to disassemble the control module. However, each heating season check the lead wires for insulation deterioration and good connections.

Proper operation of the direct spark ignition system requires a minimum flame signal of 1.0 microamps as measured by a microampmeter.

For further information and check out procedure on the direct spark ignition sys- tem, refer to Paragraph 20 and the Troubleshooting Flow Chart in Paragraph 40.

FIGURE 19 - DSI

Integrated Control Module

(Circuit Board)

Only replaceable part is a Type ATC or ATO 3 amp fuse (Color Code Violet), P/N 201685

Form RZ-NA I-UDA, Mfg #195673 Rev 5, Page 31

Image 31

Thomas & Betts UDAP, UDAS dimensions Ignition System, Location of Controls, DSI Integrated Control Module, Circuit Board

Contents

FOR YOUR SAFETY Table of ContentsSeries Fan-TypeUnit Heaters FOR YOUR SAFETY What to do if you smell gasVenting Manual by Model 2.Installation Codes1. General Hazard Levels of Warnings in this ManualRepair Garages Parking Garages 3.Warranty 4.Uncrating and PreparationSpecial Installations Aircraft Hangars Massachusetts RequirementDimension “U” Applies to both UDAP and UDAS 5. DimensionsREZNOR FIGURE 1 - Model UDAP, Power Vented Fan ModelModel MODEL UDAS DIMENSIONS inches ± 1/16MODEL UDAS DIMENSIONS mm ± FIGURE 3 - Model UDAS Separated Combustion FanSize 6. Technical DataPressure Switch 7.High Altitude Operation8. Clearances Instructions for Changing Pressure SwitchModel UDAP and Model UDAP-CV UDAP-CVConfined Space FIGURE 6 - Throw for Fan Models UDAP and UDAS 10.Unit Heater LocationHeater Throw Location Recommendations11.Hanging the Heater 10.Unit Heater Location cont’dthreaded swivel NOR Zconnectors are Be sure theWARNING PRESSURE TESTING SUPPLY PIPING 12.Gas Piping and PressuresSizing Gas Supply Line Gas Connection SizeInstructions Valve Outlet or Orifice Pressure SettingTwo -StageValve 12.Gas Piping and Pressures cont’dSingle-StageValve Instructions for High Altitude DerateHigh Altitude Capacity Changes Supply Wiring 13.Burner 14.Electrical Supply and Connections15.Thermostat and Connections FIGURE 12 - Supply Wiring Connections atCL32 16.Combustion Air Proving Switch Pressure SwitchUnit Mounted Thermostat Option CM3 Multiple Heater Control - Option CL31 and OptionSwitch cont’d 16.Combustion Air Proving17. Limit Control 18.Flame Rollout Switch - Sizes 30-125 onlyDip Switch 19.Door Switch - Model UDAS only20.Ignition System Normal Heat Cycle Operating SequenceNormal Heat Cycle Operating Sequence cont’d 20.Ignition System cont’dAbnormal Heat Cycle Functions Continuous Fan Operation Fault Modes 21.Gas Valve 22.Fan Motor Fault Modes cont’d Lockout20.Ignition System cont’d WIRING CODE 23. Wiring DiagramsUDAP & UDAS SERIES FIELD CONTROL WIRINGForm RZ-NA I-UDA,P/N 195673 Rev 5, Page 23. Wiring Diagrams cont’dGREEN LED FIELD CONTROL WIRINGWIRING CODE Form RZ-NA I-UDA,Mfg #195673 Rev 5, PageOperating Instructions and Operating Sequence 24.Check Installation and StartupCheck the installation prior to startup Heater StartupοVent System Testing Procedure - Model UDAP Check installation after startupFIGURE 16 - Gas Valve ON/OFF Control Knob use only factory-authorizedparts MAINTENANCE AND SERVICE 25.Maintenance Schedule24.Startup cont’d NOTE If replacement parts are requiredCAUTION Use of eye protection is recommended 26.Heat Exchanger Maintenance27.Burner Maintenance Burner Removal Instructions Refer to FIGUREBurner Removal cont’d 27.Burner Maintenance cont’dInspect and Clean the Burner Re-Installthe Burner 28.Burner OrificeCircuit Board 29.Ignition SystemFIGURE 18 - Location of Controls FIGURE 19 - DSI Integrated Control Module30. Fan Motor 29. IgnitionSystem cont’d34. Limit Control 33.Combustion Air Pressure Switch35. Door Switch 32.Operating Gas ValveTroubleshooting 37.Flame Rollout Switch - Sizes 30-125 onlySwitch 40. TroubleshootingGeneral Troubleshooting 40. Troubleshooting cont’d