Table Of Contents; Hazard Definitions - Lochinvar Crest OFN0751 Supplemental Manual

HAZARD DEFINITIONS .................................................. 2
PLEASE READ BEFORE PROCEEDING ..................... 3
THE OUTDOOR CREST -- HOW IT WORKS ............. 4-5
RATINGS .......................................................................... 6
1. DETERMINE BOILER LOCATION
Installation Must Comply With: ............................................ 7
Before Locating the Boiler, Check: ..................................... 7
Provide Clearances ............................................................. 8
Prevent Combustion Air Contamination .............................. 8
Remove Boiler from Wood Pallet ........................................ 8
Install Outdoor Vent Kit ....................................................... 9
Outdoor Venting ................................................................ 10
Outdoor Vent/Air Inlet Location ......................................... 10
2. GAS CONNECTIONS
Gas Supply ........................................................................ 11
Connecting Gas Supply Piping ....................................11-12
Natural Gas: ...................................................................... 12
Propane Gas: .................................................................... 12
Check Inlet Gas Supply .............................................. 13-14
Gas Valve Replacement ................................................. 14
3. START-UP
Pre-Commissioning Cleaning ........................................... 15

Hazard definitions

The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels or
to important information concerning the life of the product.
DANGER indicates an imminently hazardous situation which, if not avoided, will result in death or serious
DANGER
⚠
injury.
WARNING indicates a potentially hazardous situation which, if not avoided, could result in death or serious
WARNING
⚠
injury.
CAUTION indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate
CAUTION
⚠
injury.
CAUTION used without the safety alert symbol indicates a potentially hazardous situation which, if not
CAUTION
avoided, may result in property damage.
NOTICE indicates special instructions on installation, operation, or maintenance that are important but not
NOTICE
related to personal injury or property damage.
2
CONTENTS
Fill Water ........................................................................... 15
Boiler Water...................................................................... 15
Oxygen Prevention .......................................................... 16
Check for Gas Leaks ........................................................ 16
Check Thermostat Circuit(s) ............................................. 17
Inspect Condensate System ............................................. 17
Final Checks Before Starting the Boiler ............................ 17
Start the Boiler .................................................................. 17
If Boiler Does Not Start Correctly ...................................... 17
Check System and Boiler .................................................. 17
Check Flame and Combustion .......................................... 18
Operating Instructions ....................................................... 19
4. DIAGRAMS
Ladder Diagram 751 - 2001 Models ................................. 20
Wiring Diagram 751 - 2001 Models .................................. 21
Ladder Diagram 2501 - 3501 Models ............................... 22
Wiring Diagram 2501 - 3501 Models ................................ 23
Ladder Diagram 4001 - 5001 Models ............................... 24
Wiring Diagram 4001 - 5001 Models ................................ 25
Ladder Diagram 6001 Model ............................................ 26
Wiring Diagram 6001 Model ............................................. 27
Revision Notes .................................................. Back Cover