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FBD-SUP_100161023_2000004585 Rev E
Dual Fuel Supplemental Manual
Models: FBD 2.5 - 6.0
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 FBN 2500
- Page 1 FBD-SUP_100161023_2000004585 Rev E Dual Fuel Supplemental Manual Models: FBD 2.5 - 6.0 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 ..............11 THE CREST -- HOW IT WORKS ........4 Check System and Boiler ..........11 RATINGS ................5 Operating Instructions ............12 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... 9. Large propane gas valve (Valve 2 Propane) 1. Propane gas connection The large propane 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 powered 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 Assemble/install proof of closure Table 1A Ship Loose Kit Components valve (FBD 6000 model only) Kit Components Before installing your FBD6000 boiler Material / Part No. Description QTY. NOTICE YOU MUST install the LP proof of 100134332 Tee, 1/8 NPT, CLS 150, BLK, Straight closure assembly provided in the ship... -
Page 7: Assemble Proof Of Closure Valve
Dual Fuel Supplemental Manual Gas connections (continued) Assemble proof of closure valve Figure 1-4 High and Low Gas Pressure Switch Assembly Reference FIG. 1-1 for assembly of the proof of closure valve. Note: DO NOT install the actuator portion of the proof of closure assembly at this time. -
Page 8: Wiring For The High & Low Gas Pressure Switch
Dual Fuel Supplemental Manual Gas connections Wiring for the high and low gas pressure switches and proof of closure switch (reference FIG. 1-7) Using the wire harness included in the ship loose kit, connect the 4-pin connector to the mating connector located on the top panel of the boiler. -
Page 9: Check Inlet Gas Supply
Dual Fuel Supplemental Manual Gas connections (continued) Table 1B Natural Gas Pipe Size Chart TABLE - 1B Capacity of Schedule 40 Metallic Pipe in Cubic Feet of Natural Gas Per Hour (based on .60 specific gravity, 0.30" w.c. pressure drop) Length of Pipe in Straight Feet Pipe Size... -
Page 10: Gas Pressure
Dual Fuel Supplemental Manual Gas connections 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 11: 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 12: Operating Instructions
Dual Fuel Supplemental Manual Start-up 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. • A. -
Page 13: Check Flame And Combustion
Dual Fuel Supplemental Manual Start-up (continued) Check flame and combustion 8. After Gas Valve 1 is set, repeat the same procedure for the second gas train by selecting Set Gas Valve 2 - High on the A flame and combustion check NOTICE Service Screen. - Page 14 Dual Fuel Supplemental Manual Start-up 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 - 6.0 Figure 2-3 Ball Valves PROPANE PERSONALITY I.D. NATURAL PERSONALITY I.D. IMG00555 MAIN POWER SWITCH...
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Page 15: 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 16 Dual Fuel Supplemental Manual Diagrams 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 1.5A EACH MAX...
- Page 17 Dual Fuel Supplemental Manual Diagrams (continued) Figure 3-3 Wiring Diagram_4.0 Model...
- Page 18 Dual Fuel Supplemental Manual Diagrams Figure 3-4 Ladder Diagram_4.0 Model...
- Page 19 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 20 Dual Fuel Supplemental Manual Diagrams 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 21 Dual Fuel Supplemental Manual Diagrams (continued) Figure 3-7 Wiring Diagram_6.0 Model BOX DEPICTS OPTIONAL ITEMS BOX DEPICTS DUAL SENSOR SINGLE HOUSING BOARD X1-1 LARGE CONNECTION BOARD X1-2 LOW VOLTAGE X1-3 120 VAC SHIELD CN6-3 X6-3 INTEGRATED CONTROL CN6-2 X6-1 HIGH VOLTAGE OPTION CN6-1 X6-2...
- Page 22 Dual Fuel Supplemental Manual Diagrams Figure 3-8 Ladder Diagram_6.0 Model NEUTRAL JUNCTION BOX BOX DEPICTS L1 L2 L3 TERMINAL STRIP TERMINAL STRIP OPTIONAL ITEMS 208V 3 SUPPLY 208V SUPPLY "N" BOX DEPICTS DUAL SENSOR SINGLE HOUSING X1-3 INTEGRATED CONTROL 1.5A EACH MAX ON/OFF BOARD SWITCH...
- Page 23 Dual Fuel Supplemental Manual Notes...
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Page 24: 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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