Lochinvar Crest FBD 2.5 Supplemental Manual
Dual fuel condensing boiler
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Also See for Crest FBD 2.5:
- Service manual (56 pages) ,
- Installation & operation manual (60 pages) ,
- Installation instructions (2 pages)
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FBD-SUP_100161023_2000004585 Rev D
Dual Fuel Supplemental Manual
Models: FBD 2.5 - 5.0
This manual must only be used by
WARNING
a qualified heating installer / service
technician. Read all instructions,
including this manual along with
the Crest Installation and Operation
Manual, and the Crest Service Manual,
before installing. Perform steps in the
order given. Failure to comply could
result in severe personal injury, death,
or substantial property damage.
Save this manual for future reference.
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Summary of Contents for Lochinvar Crest FBD 2.5
- Page 1 FBD-SUP_100161023_2000004585 Rev D Dual Fuel Supplemental Manual Models: FBD 2.5 - 5.0 This manual must only be used by WARNING a qualified heating installer / service technician. Read all instructions, including this manual along with the Crest Installation and Operation Manual, and the Crest Service Manual, before installing.
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Page 2: Table Of Contents
CONTENTS HAZARD DEFINITIONS ............ 2 2. START-UP PLEASE READ BEFORE PROCEEDING ......3 Start the Boiler ..............8 THE CREST -- HOW IT WORKS ........4 Check System and Boiler ............ 8 RATINGS ................5 Operating Instructions ............9 1. GAS CONNECTIONS Check Flame and Combustion ......... -
Page 3: Please Read Before Proceeding
Dual Fuel Supplemental Manual Please read before proceeding Installer – Read all instructions, including When servicing boiler – WARNING this manual, the Crest Installation and • To avoid electric shock, disconnect electrical supply Operation Manual and the Crest Service before performing maintenance. Manual, before installing. -
Page 4: The Crest -- How It Works
Dual Fuel Supplemental Manual The Crest Dual Fuel - How it works... 8. Large natural gas valve (Valve 2 Natural) 1. Propane gas connection The large natural gas valve senses the negative pressure created The propane gas connection pipe is a threaded black iron pipe by the blowers, allowing gas to flow only if the gas valves are connection. -
Page 5: Ratings
Dual Fuel Supplemental Manual Ratings Crest Other Specifications AHRI Rating Vent Weight AHRI Model Number Gross Input Appliance Size w/Water Ratings Output Pipe Pipe Water Gas Inlet (lbs.) Water, Size Size Size Content Size Note: Change “N” to Outlet Inlet (Notes 4 - 8) Gallons “L”... -
Page 6: Gas Connections
Dual Fuel Supplemental Manual Gas connections Table 1A First Stage Piping at High Pressure_10 PSI Nominal Iron Pipe Length of pipe or tubing, feet Size Inches Maximum Capacities of Pipe in KBTUH/Hr 2442 1885 1580 1382 1240 1133 1048 Pipe 4831 3812 3230... -
Page 7: Gas Pressure
Dual Fuel Supplemental Manual Gas connections (continued) Do not check for gas leaks with an open Ignition problems are especially noticeable in NEW LP WARNING flame -- use the bubble test. Failure to installations and also in empty tank situations. This can use the bubble test or check for gas leaks also occur when a utility company shuts off service to an can cause severe personal injury, death, or... -
Page 8: Start-Up
Dual Fuel Supplemental Manual Start-up Final checks before starting the boiler Check vent piping and air piping 1. Check for gastight seal at every connection, seam of air Read the Crest Service Manual to familiarize yourself piping, and vent piping. with SMART TOUCH control module operation. -
Page 9: For Your Safety Read Before Operating
Dual Fuel Supplemental Manual Start-up (continued) Figure 2-1 Operating Instructions FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury, or loss of life. •... -
Page 10: Check Flame And Combustion
Dual Fuel Supplemental Manual Start-up Check flame and combustion 10. Repeat the same procedure for propane gas. Reference the Dual Fuel Switching Instructions on pages 10 and 11 of this A flame and combustion check NOTICE manual. must be performed on natural gas and then repeated on propane. -
Page 11: Dual Fuel Switching Instructions
Dual Fuel Supplemental Manual Start-up (continued) 3. Turn off all ball valves (3 total) for the fuel not in use (FIG. 2-3). Figure 2-2B Fuel Selector Switch - Models 4.0 - 5.0 Figure 2-3 Ball Valves PROPANE PERSONALITY I.D. NATURAL PERSONALITY I.D. -
Page 12: Diagrams
Dual Fuel Supplemental Manual Diagrams Figure 3-1 Wiring Diagram_2.5 - 3.5 Models WARNING BOX DEPICTS OPTIONAL ITEMS DISCONNECT POWER BOX DEPICTS BEFORE SERVICING DUAL SENSOR SINGLE HOUSING X1-1 LARGE CONNECTION BOARD X1-2 LOW VOLTAGE X1-3 CN6-3 X6-3 120 VAC SHIELD INTEGRATED CONTROL CN6-2 X6-1... - Page 13 Dual Fuel Supplemental Manual Diagrams (continued) Figure 3-2 Ladder Diagram_2.5 - 3.5 Models 120VAC NEUTRAL JUNCTION BOX WARNING BOX DEPICTS TERMINAL STRIP TERMINAL STRIP OPTIONAL ITEMS 120V SUPPLY "L" 120V SUPPLY "N" DISCONNECT POWER BOX DEPICTS DUAL SENSOR BEFORE SERVICING SINGLE HOUSING INTEGRATED CONTROL X1-3...
- Page 14 Dual Fuel Supplemental Manual Diagrams (continued) Figure 3-3 Wiring Diagram_4.0 Model...
- Page 15 Dual Fuel Supplemental Manual Diagrams (continued) Figure 3-4 Ladder Diagram_4.0 Model...
- Page 16 Dual Fuel Supplemental Manual Diagrams (continued) Figure 3-5 Wiring Diagram_5.0 Model WARNING BOX DEPICTS OPTIONAL ITEMS DISCONNECT POWER BOX DEPICTS BEFORE SERVICING DUAL SENSOR SINGLE HOUSING X1-1 LARGE CONNECTION BOARD X1-2 LOW VOLTAGE X1-3 120 VAC SHIELD CN6-3 X6-3 INTEGRATED CONTROL CN6-2 X6-1 MODBUS...
- Page 17 Dual Fuel Supplemental Manual Diagrams (continued) Figure 3-6 Ladder Diagram_5.0 Model NEUTRAL JUNCTION BOX BOX DEPICTS WARNING OPTIONAL L1 L2 ITEMS TERMINAL STRIP TERMINAL STRIP 208V 3Ø SUPPLY 208V SUPPLY "N" DISCONNECT POWER BOX DEPICTS DUAL SENSOR BEFORE SERVICING SINGLE HOUSING INTEGRATED CONTROL X1-3 1.5A EACH MAX...
- Page 18 Dual Fuel Supplemental Manual Notes...
- Page 19 Dual Fuel Supplemental Manual Notes...
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Page 20: Revision Notes
Revision Notes: Revision A (ECO #C08841) initial release. Revision B (EC) #C10391) reflects the update of wiring and ladder diagrams on pages 12 and 13. Revision C (ECO C11685) reflects the addition of models 4.0 and 5.0. Revision D (Change #500001029) reflects the removal of Models 1.5 and 2.0 along with updates to the control.
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