Gemini™ Twin-Fuel Gas-Fired Boiler
TABLE OF CONTENTS
1.0 INTRODUCTION.........................................1
2.0 DESCRIPTION............................................2
2.1 Principle of Operation.............................. 2
3.0 SAFETY ......................................................2
3.1 General ...................................................2
3.2 Training...................................................2
3.3 Safety Features.......................................3
3.4 Safety Labels ..........................................3
3.5 Safety Precautions..................................3
3.5.1 Electrical Hazards ......................................3
3.5.2 Burn, Fire, and Explosion Hazards.............3
3.5.3 Crush Hazards ...........................................4
3.5.4 Chemical Hazards......................................4
4.0 INSTALLATION ..........................................5
4.1 General ...................................................5
4.2 Gas Piping ..............................................6
4.2.1 Gas Bleeds and Vents................................7
4.3 Pre-Start Check List................................7
4.4 Pre-Start Safety Checks and Adjustments 7
4.4.1 Test of Ignition Safety System....................8
4.4.2 Test of Low Water Cutoff ...........................9
4.4.3 Test of High-Limit Control ..........................9
4.4.4 Test of Gas Pressure Switch .....................9
4.4.5 Gas Pressure Adjustment........................10
4.4.6 Leak Testing of Valves.............................10
5.0 OPERATION............................................. 13
5.1 General.................................................. 13
5.1.1 Tests ........................................................13
5.1.2 Starting System........................................13
5.2 Lighting and Shut-Down Procedures .... 13
5.2.1 Lighting Procedures .................................13
5.2.2 Normal Shut-Down Procedures ...............14
5.2.3 Emergency Shut-Down ............................14
5.3 Switchover to Propane Operation ......... 14
7.0 MAINTENANCE........................................ 15
7.1 General................................................. 15
7.2 Sequence of Operation......................... 16
8.0 PARTS AND TECHNICAL SUPPORT ...... 17
8.1 Wiring Diagrams................................... 17
8.1.1 Wiring Diagram (Lo-Hi-Lo).......................18
8.1.2 Control Logic Diagram (Lo-Hi-Lo) ............19
8.1.3 Wiring Diagram (On-Off)..........................20
8.1.4 Control Logic Diagram (On-Off)...............21
It is essential to read, understand, and follow the recommenda-
tions of this manual before installing, operating, or servicing this
equipment. Failure to do so could result in serious injury,
death, and/or property damage.
The information and instructions herein pertain only to equip-
ment supplied by Patterson-Kelley Company. Patterson-Kelley
is not responsible for equipment supplied by others, nor for any
adverse effects such equipment might have on equipment sup-
plied by Patterson-Kelley.
