Roberts Gorden 125, 75, 100 service manual Roberts-Gordon LLC

TABLE OF CONTENTS
SECTION 1: Heater Safety		1
1.1 Manpower Requirements		1
1.2 Safety Labels and Their Placement		1
1.3 California Proposition 65		1
SECTION 2: Installer Responsibility		4
2.1	Wall Tag	4
2.2	Corrosive Chemicals	4
2.3	National Standards and Applicable Codes	4
SECTION 3: Critical Considerations		5
3.1	Basic Information	5
3.2	Manufactured Units	5
3.3	Location and Suspension	5
3.4	Minimum Required Installation Clearances	5
3.5	Ventilation	5
3.6	Gas Supply	5
3.7	Electrical Supply	5
3.8	Vent	5
SECTION 4: Clearances to Combustibles		6
4.1	Required Clearances to Combustibles	6
4.2	Clearances to Combustibles	6
SECTION 5: National Standards and Applicable Codes		7
5.1	Gas Codes	7
5.2	Aircraft Hangars	7
5.3	Parking Structures and Repair Garages	7
5.4	Electrical	7
5.5	Venting	7
5.6	High Altitude	8
SECTION 6: Duct Heater Installation		9
6.1	General	9
6.2	Shelf Mounting and Suspension	10
6.3	Wall Mounting	10
SECTION 7: Venting		12
7.1 Changing Vent and Air Intake Orientation		12
7.2 Venting		12
7.3 Vent Installation		12
7.4 Unvented Operation		13
7.5 Horizontal Venting		13
7.6 Vertical Venting		13
7.7 Length Requirements		13
7.8 Vent Material		14
7.9 Replacing an Existing Heater in a Venting System		14
SECTION 8: Air Supply		18
8.1	Separated Combustion Installation	18
8.2	Unvented Installation	18
8.3	Building Ventilation	18
8.4	Outside Combustion Air Supply	18
SECTION 9: Gas Piping		19
9.1	Connections	19
SECTION 10: Wiring		21
10.1 Positioning Thermostats		21

10.2	Low Voltage Thermostat with One Heater	21
10.3	UHD[X][S] Series Internal Wiring Diagram	22
10.4	UHD[X][S] Series Ladder Wiring Diagram	23
10.5	Electrical Connection to the Heater	24
SECTION 11: Operation and Maintenance		25
11.1 Pre-Start-Up Checks		25
11.2 Begin Start-Up		25
11.3 Complete Start-Up		27
SECTION 12: User Instructions		28
12.1	Heater Operation	28
12.2	Common User Controls	28
12.3	Lighting Instructions	29
12.4	Simple Troubleshooting	29
SECTION 13: Servicing		30
13.1	Servicing Instructions	30
13.2	Burner Maintenance	30
13.3	Heat Exchanger Maintenance	30
13.4	Gas Valve Maintenance	30
13.5	Flue Blower	30
13.6	Venting and Air Intake Pipe	30
13.7	Maintenance Checklist	31
SECTION 14: Troubleshooting		33
14.1	General	34
14.2	Troubleshooting For Automatic Ignition Burner
	Systems	35
14.3	Troubleshooting for Flame Supervision System	36
14.4	Troubleshooting for Gas Valves	37
14.5	Troubleshooting for Flue Blower	37
SECTION 15: Replacement Parts		38
15.1	Gas Valve	38
15.2	Burner Compartment	39
15.3	Ignition Electrode and Flame Probe	40
15.4	Heat Exchanger	40
15.5	Flue Blower Vertical Installation	41
15.6	Pressure Switch	42
15.7	Ignition Control	42
15.8	Limit Switches	42
SECTION 16: Specifications		43
16.1	Dimension Data	43
16.2	General Technical Data Table	44
16.3	Technical Data Table	44
SECTION 17: ROBERTS GORDON® COMBAT®
	UHD-Series Warranty	46

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