Roberts Gorden UHD[X][S][R] 125, UHD[X][S][R] 75 service manual Roberts-Gordon LLC

TABLE OF CONTENTS

SECTION 1: Heater Safety		1	SECTION 10: Operation and Maintenance		23
1.1 Manpower Requirements		1	10.1	Pre-Start-Up Checks	23
SECTION 2: Installer Responsibility		2	10.2	Begin Start-Up	23
2.1	Wall Tag	2	10.3	Complete Start-Up	25
2.2	Corrosive Chemicals	2	SECTION 11: User Instructions		26
2.3	National Standards and Applicable Codes	2	11.1 User Instructions		26
SECTION 3: Critical Considerations		3	11.2 Heater Operation		26
3.1	Basic Information	3	11.3 Common User Controls		26
3.2	Manufactured Units	3	11.4 Lighting Instructions		26
3.3	Location and Suspension	3	11.5 Simple Troubleshooting		27
3.4	Minimum Required Installation Clearances	3	SECTION 12: Servicing		28
3.5	Clearances to Combustibles	3	12.1	Servicing Instructions	28
3.6	Ventilation	4	12.2	Burner Maintenance	28
3.7	Gas Supply	4	12.3	Heat Exchanger Maintenance	28
3.8	Electrical Supply	4	12.4	Gas Valve Maintenance	28
3.9	Vent	4	12.5	Flue Blower	28
SECTION 4: National Standards and Applicable Codes		5	12.6	Venting and Air Intake Pipe	28
4.1	Gas Codes	5	12.7	Maintenance Checklist	29
4.2	Aircraft Hangars	5	SECTION 13: Troubleshooting		31
4.3	Parking Structures and Repair Garages	5	13.1	General	31
4.4	Electrical	5	13.2	Troubleshooting For Automatic Ignition Burner
4.5	Venting	5		Systems	32
4.6	High Altitude	6	13.3	Troubleshooting for Flame Supervision System	33
SECTION 5: Duct Heater Installation		7	13.4	Troubleshooting for Gas Valves	34
5.1	General	7	13.5	Troubleshooting for Flue Blower	34
5.2	Shelf Mounting and Suspension	8	SECTION 14: Replacement Parts		35
5.3	Wall Mounting	8	14.1	Gas Valve	35
SECTION 6: Venting		10	14.2	Burner Compartment	36
6.1	Changing Vent and Air Intake Orientation	10	14.3	Ignition Electrode and Flame Probe	37
6.2	Venting	10	14.4	Heat Exchanger	37
6.3	Vent Installation	10	14.5	Flue Blower Vertical Installation	38
6.4	Unvented Operation	11	14.6	Pressure Switch	39
6.5	Horizontal Venting	11	14.7	Ignition Control	39
6.6	Vertical Venting	11	14.8	Limit Switches	39
6.7	Length Requirements	11	SECTION 15: Specifications		40
6.8	Vent Material	12	15.1	Dimension Data	40
6.9	Replacing an Existing Heater in a Venting System ....	12	15.2	General Technical Data Table	41
SECTION 7: Air Supply		17	15.3	Technical Data Table	41
7.1 Separated Combustion Installation		17	SECTION 16: ROBERTS GORDON® COMBAT® UHD-Series
7.2 Unvented Installation		17		Warranty	43
7.3 Building Ventilation		17
7.4 Outside Combustion Air Supply		17
SECTION 8: Gas Piping		18
8.1	Connections	18
SECTION 9: Wiring		19
9.1	Positioning Thermostats	19
9.2	Low Voltage Thermostat with One Heater	19
9.3	Internal Wiring Diagram	20
9.4	Ladder Wiring Diagram	21
9.5	Electrical Connection to the Heater	22

©2008 Roberts-Gordon LLC

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