Manuals / Roberts Gorden / Household Appliance / Gas Heater

Roberts Gorden 300, 200, 350, 150 Pressure Switch, Ignition Control, Axial Fan/Guard/Motor Assembly

Models: 175 225 300 250 400 150 350 200

1 62

Download 62 pages 5.65 Kb

Page 53

15.7 Pressure Switch

SECTION 15: REPLACEMENT PARTS

15.7 Pressure Switch

Pull off 3 way connector. Spring open plastic clips of mounting cradle. Replace with correct type of pressure switch for model. The pressure switches are color coded for each pressure setting. Carry out a start-up after working on or changing a pressure switch. See Page 27, Section 11.

	UHA[X][S]	UHA[X][S]	UHA[X][S]	UHA[X][S]	UHA[X][S]
MODEL	150 - 175	200 - 225	250	300 - 350	400

Pressure Switch
Kit P/N	90439802	90439808	90439803	90439807	90439808

Color Code	yellow	orange	gray	brown	orange

Set Point in. w.c.	.32	.79	.41	.68	.79

Pressure Switch Snap
Ring P/N	90439850	90439850	90439850	90439850	90439850

15.8 Ignition Control

The control mounts to the electrical plate. Pull out ignition cable and wiring from board, noting their positions. Release the four mounting standoffs. Refit in reverse. Ensure correct location of ignition cable and all other wiring.

15.9 Axial Fan/Guard/Motor Assembly

The axial fan unit for the heater is supplied completely assembled and balanced

MODEL	UHA[X][S] 150	- 175	UHA[X][S] 200- 250	UHA[X][S] 300	- 400

Axial Fan Guard	91901104		91901104	91901105

Axial Fan Motor	90600107		90600107	90600106

Axial Fan Blade	90709006		90709006	90709005

45 of 51

Image 53

Roberts Gorden 300, 200, 350, 150, 400, 250, 225, 175 Pressure Switch, Ignition Control, Axial Fan/Guard/Motor Assembly

Contents

Combat Installation, Operation & Service ManualUHA-Series Tubular Unit Heaters Standard Range Models UHAXS 150, 175, 200, 225 250, 300Page Modèles UHAXS 150, 175, 200, 225 250, 300, 350, Gamme standardManuel d’installation, d’operation, et de service CombatPage Printed in U.S.A 2012 Roberts-GordonLLCPage TABLE OF FIGURES Page 1.1 Manpower Requirements SECTION 1: HEATER SAFETY1.2 Safety Labels and Their Placement 1.3 California PropositionFor separated combustion units only 2 of Figure 1: UHAXS150 - 175 Label PlacementFor separated combustion units only 3 of Figure 2: UHAXS200 - 250 Label PlacementFor separated combustion units only 4 of Figure 3: UHAXS300 - 400 Label Placement2.1 Wall Tag SECTION 2: INSTALLER RESPONSIBILITY2.2 Corrosive Chemicals Product Damage Hazard3.2 Manufactured Units 3.4 Minimum Required Installation Clearances3.5 Ventilation 3.6 Gas Supply4.2 Clearances To Combustibles Fire Hazard5.2 Aircraft Hangars 5.1 Gas Codes5.3 Parking Structures and Repair Garages 5.4 Electrical5.6 High Altitude 6.2 Suspension SECTION 6: HEATER INSTALLATION 6.1 GeneralCrush Hazard Use 3/8 threaded rod minimum Figure 5 Suspension Methods7.2 Vent Installation Heaters may be installed vented or unventedSECTION 7: VENTING Carbon Monoxide Hazard7.3 Unvented Operation 7.2.1Standard Vented Heaters Models UHAX 150 -7.4 Horizontal Venting 7.5 Vertical VentingFigure 6: Vent and Roof Detail Maximum Vent Lengths Table7.7 Vent Material Vertical Option Bend Horizontal Option 14 ofModel Part Number15 of RequirementsHeaters must be of the same BTU output 16 of Figure 10: Concentric Vent BoxVertical 17 ofOption Horizontal8.2 Unvented Installation 8.1 Separated Combustion InstallationSECTION 8: AIR SUPPLY Explosion HazardSECTION 9: GAS PIPING Gas can leak if piping is not installed properly9.1 Connections Explosion HazardProduct Damage Hazard Do not bend flexible gas connectorFigure 12 Gas Connection Disconnect electric before service SECTION 10: WIRINGDANGER Electrical Shock HazardModel 22 ofRelay Type Relay Part NumberModel 23 ofRelay Type Relay Part Number10.5 UHAXS Series Internal Wiring Diagram 10.6 UHAXS Series Ladder Wiring Diagram 26 of 10.7 Electrical Connection to the HeaterNote: Junction box is not provided with heater heater before service SECTION 11: OPERATION AND MAINTENANCEbefore service during installation11.2.1 Before Operating the Heater 11.2 Begin Start-Upon Page 28, Figure Figure 13: Automatic Burner Control SequenceFigure 14: Gas Valve for Models UHAXS 150 - 11.2.3 Pressure SwitchCheck Gas Rate 11.2.4 Turning Off the Heater11.3.1 Instruction to the User 11.2.5 External Controls11.3 Complete the Start-Up 12.3.1 Simple Troubleshooting Burner Fault 12.3 Simple TroubleshootingFigure 15: LED Diagnostic Codes SECTION 12: USER INSTRUCTIONS13.3 Fan/Motor Assembly Maintenance 13.2 Burner Maintenance13.4 Heat Exchanger Maintenance 13.5 Gas Valve Maintenance13.7 Venting and Air Intake Pipe 13.8 Maintenance ChecklistAnnual Fall Start-Up The Vicinity of the HeaterHeat Exchanger when installedSee Page 19, Section Gas Line and Shut-offheater before service SECTION 14: TROUBLESHOOTINGbefore service during installation36 of 14.1 General37 of 14.3 Troubleshooting for Flame Supervision System 39 of 14.4 Troubleshooting for Gas Valves14.5 Troubleshooting for Flue Blower Burner Components SECTION 15: REPLACEMENT PARTS15.1 Gas Valve DANGER15.2.1 Burner Injectors 15.2 Burner Compartment15.3 Ignition Electrode and Flame Probe 15.5 Louvers and Louver Spring 15.4 Heat Exchanger15.6 Flue Blower 15.8 Ignition Control 15.7 Pressure Switch15.9 Axial Fan/Guard/Motor Assembly 15.10 Limit Switches 15.9.1Fan Removal and Replacement15.10.1 Removal and Replacement 15.9.2 To Replace the Fan Assembly47 of SECTION 16: SPECIFICATIONS 16.1 Dimension Data48 of 16.2 General Technical Data Table16.3 Technical Data Table ROBERTS-GORDONLLC WILL PAY FOR WARRANTY IS VOID IFROBERTS-GORDONLLC WILL NOT PAY FOR U.S.APage OWNER WARRANTY REGISTRATION CARD Mail or Fax toAbout the Installer Purchased From if different than installerPage