Roberts Gorden CTU 22 TO 115 service manual Roberts-Gordon,LLC

TABLE OF CONTENTS

SECTION 1: Heater Safety		2	SECTION 12: User Instructions		28
SECTION 2: Installer Responsibility		2	12.1	User Instructions	28
2.1	Clearances to Combustibles	2	12.2	Heater Operation	28
2.2	Corrosive Chemicals	2	12.3	Common User Controls	28
2.3	National Standards and Applicable Codes	2	12.4	Lighting Instructions	28
SECTION 3: Critical Considerations		3	12.5	Simple Fault Finding	29
3.1	Basic Information	3	SECTION 13: Servicing		30
3.2	Location and Suspension	3	13.1	Servicing Instructions	30
3.3	Minimum Required Installation Clearances	3	13.2	Burner Maintenance	30
3.4	Clearances to Combustibles	3	13.3	Fan/Motor Assembly Maintenance	30
3.5	Ventilation	3	13.4	Heat Exchanger Maintenance	30
3.6	Gas Supply	3	13.5	Gas Control Valve Maintenance	30
3.7	Electrical Supply	3	13.6	Flue Fan	30
3.8	Flue	3	SECTION 14: Conversion Between Gases		31
SECTION 4: Specifications		5	14.1	General	31
4.1	CTUA	5	14.2	Burner Conversion	31
4.2 CTUB, CTUC and CTUD		6	14.3 Gas Valves		31
4.3	General Technical Data Table	7	SECTION 15: Troubleshooting		32
4.4	Technical Data Table	8	15.1	General	32
SECTION 5: Heater Installation		9	15.2	Troubleshooting For Automatic Ignition Burner
5.1	General	9		Systems	33
5.2	Handling	9	15.3	Troubleshooting for Flame Supervision System	34
5.3	Shelf Mounting and Suspension	9	15.4	Troubleshooting for Solenoid Valves	34
SECTION 6: Flue Installation		10	SECTION 16: Removal and Replacement Parts		35
6.1	Flue Installation	10	16.1	Gas Valve	35
6.2	Type C12, C32 & C62 Appliance	10	16.2	Burner Compartment	36
6.3	Type B22 Appliance	10	16.3	Ignition Electrode and Flame Probe	37
SECTION 7: Air Supply		12	16.4	Flue Fan	38
7.1 Room Sealed Installation		12	16.5	Pressure Switch	39
7.2 Open Flued Installation		12	16.6	Ignition Control	40
7.3 Building Ventilation		12	16.7	CTUA Axial Fan/Guard/Motor Assembly	40
7.4 Isolated Equipment Rooms		12	16.8	CTUB & CTUC Centrifugal Fan/Guard/Motor
SECTION 8: Optional Heater Configurations		13		Assembly	40
8.1	Distribution Duct Work for CTUB, CTUC and CTUD		16.9	Fan Data	41
	Heaters	13
SECTION 9: Gas Piping		14
9.1	Connections	14
SECTION 10: Wiring and Electrical Information		15
10.1 Electrical Supply		15
10.2 Remote Controls		15
10.3 CTUA Wiring Diagram (Models 22-60)		16
10.4 CTUA Wiring Diagram (Models 75-115)		17
10.5 CTUB/C Wiring Diagram (Models 22-40)		18
10.6 CTUB/C Wiring Diagram (Models 50-60)		19
10.7 CTUB/C Wiring Diagram (Models 75-115)		20
10.8 CTUD Wiring Diagram (Models 22-60)		21
10.9 CTUD Wiring Diagram (Models 75-115)		22
10.10 CTUD External Motor Alternative Wiring &
	Optional Thermostat/Time Switch	23
SECTION 11: Commissioning		24
11.1 Pre-Commission Checks		24
11.2 Gas Supply		24
11.3 Mechanical Checks		24
11.4 Begin Commissioning		24
11.5 Combustion Testing		26
11.6 Turning Off the Heater		26
11.7 External Controls		27
11.8 Complete the Commissioning		27
11.9 Instruction to the User		27

©2007 Roberts-Gordon, LLC

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