Thomas & Betts UDAP Check installation after startup, Vent System Testing Procedure Model Udap

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FIGURE 16 - Gas Valve ON/OFF Control Knob

Top View

Gas Control Knob (shown in the

ON position)

Side View

Gas

Gas

Flow

Flow

4.Turn the gas control knob clockwise to "OFF".

5.Wait five (5) minutes to clear out any gas. Then smell for gas, including near the floor. If you smell gas, STOP! and follow the steps in the WARNINGS printed above or on the Operating Label on the heater. If you do not smell gas, proceed to the next step.

6.Turn the gas control knob counterclockwise to "ON".

7.Close the access door.

8.Turn on the electric power to the heater.

9.Set the thermostat to the desired setting.

NOTE: If the appliance does not operate, follow the instructions "To Turn Off Gas to Appliance" printed below (and on the Operating Label on the heater) and call your service technician.

10.Thermostat calls for heat, energizing the venter motor.

11.Venter pressure switch closes, firing the unit.

12.Burner flame is sensed and in 30 seconds after the gas valve is energized, the fan motor is energized.

13.If the flame is extinguished during the main burner operation, the integrated control system closes the main valve and must be reset by interrupting power to the control circuit. (See lighting instructions on the heater.).

TO TURN OFF GAS TO THE APPLIANCE

1)Set thermostat to lowest setting

2)If service is to be performed, turn off all electric power to the appliance.

3)Open the access door.

4)Turn the gas control knob clockwise to "OFF". Do not force.

5)Close the access door.

Check installation after startup:

οVent System Testing Procedure - Model UDAP

1.Seal any unused openings in the venting system.

2.Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1 or CAN/CGA B149.1 and B149.2, Installation Code for Gas Burning Appliances and Equipment, and the venting installation manual. Determine that there is no blockage or restriction, leakage, corrosion or other deficiencies that could cause an unsafe condition.

3.In so far as practical, close all building doors and windows and all doors between the space where the heater is and other spaces of the building. Turn on clothes dryers and exhaust fans, such as range hoods and bathroom exhausts, so they shall operate at maximum speed. Do not operate a sum- mer exhaust fan. Close fireplace dampers.

4.Light the heater following the lighting instructions. Adjust the thermostat for continued operation. Verify that combustion products are venting properly. After determining that the heater vents properly, return doors, windows, exhaust fans, and fireplace dampers to their previous conditions. If improper venting is observed, the venting system must be corrected.

οWith the unit in operation, measure valve outlet gas pressure. If operated at high altitude, adjust outlet gas pressure for altitude.

See information and instructions in Paragraph 12.

Form RZ-NA I-UDA, Mfg #195673 Rev 5, Page 27

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Contents Series Fan-Type Unit Heaters Table of ContentsVenting Manual by Model Installation CodesGeneral Hazard Levels of Warnings in this ManualMassachusetts Requirement Warranty Uncrating and PreparationSize DimensionsModel Udas Separated Combustion Fan Size 100 125 Technical DataClearances Instructions for Changing Pressure SwitchPressure Switch High Altitude OperationModel Udap and Model UDAP-CV Combustion Air applies to Model Udap and ModelUnit Heater Location Heater ThrowLocation Recommendations Model Udas Size 100 125 150 175 225 250 300 350 400 Unit Heater Location cont’dHanging the Heater Model Udap Size 100 125 150 175 225 250 300 350 400Locked to Connectors areRecommended maximum hanger rod length is 6 feet 1.8M Be sure Threaded swivelGas Piping and Pressures Sizing Gas Supply LineGas Connection Size Instructions Two -Stage Valve Manifold Pressure Settings by Altitude for CanadaGas Piping and Pressures cont’d Instructions for High Altitude DerateFeet Meters High Altitude Capacity ChangesThermostat and Connections Burner Electrical Supply and ConnectionsCombustion Air Proving Switch Pressure Switch Pressure Switch Settings Combustion Air ProvingLimit Control StatusLED Lights Door Switch Model Udas only Ignition SystemDip Switch Normal Heat Cycle Operating SequenceSW1 SW2 Time Ignition System cont’dContinuous Fan Operation Fault Modes Gas Valve Fan Motor Fault Modes cont’d LockoutOperating Sequence Wiring DiagramsWiring Diagrams cont’d SW1 Check Installation and Startup Check the installation prior to startup Heater StartupOperating Instructions Operating Sequence Vent System Testing Procedure Model Udap Check installation after startupMaintenance Schedule Startup cont’dUse only factory-authorized parts Burner Removal Instructions Refer to Figure Heat Exchanger Maintenance Burner MaintenanceBurner Orifice Burner Maintenance cont’dInspect and Clean the Burner Re-Install the Burner Instructions to Re-Install the Burner Refer to FigureDSI Fan Blades IgnitionSystem Cont’dUdas only Combustion Air Pressure SwitchDoor Switch Operating Gas ValveDisconnect Flame Rollout Switch Sizes 30-125 onlySwitch Air System TroubleshootingBurner will General TroubleshootingVenter motor Will not startCont’d Troubleshooting cont’d

UDAP, UDAS specifications

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