Instructions / Assembly
Table Of Contents
- Part 1 - General Safety Information
- Part 2 - Before You Start
- Part 3 - Prepare the Boiler
- A. Locating the Boiler
- B. Structure
- C. Leveling
- D. Clearances for Service Access
- E. Wall Mounting Considerations
- F. Wall Mounting Instructions
- G. Residential Garage and Closet Installations
- H. Exhaust Vent and Intake Pipe
- I. Carbon Monoxide Detectors
- J. Prevent Combustion Air Contamination
- K. Removing a Boiler from a Common Vent System
- K. Water Chemistry Requirements*
- L. Technical Specifications
- Part 4 - Piping
- A. General Plumbing Information
- B. Relief Valve
- C. Backflow Preventer
- D. Potable Expansion Tank
- E. Circulators
- F. Hydronic Piping with Circulators, Zone Valves, and Multiple Boilers
- G. Circulator Sizing
- H. Check / Control Water Chemistry
- I. Plumbing
- J. Fill and Purge Heating System
- K. Glycol Antifreeze Solutions
- L. Zoning with Zone Valves
- M. Zoning with Circulators
- N. Multiple Boilers
- O. Applications*
- Part 5 - Venting
- Part 6 - Condensate Removal
- Part 7 - Wiring
- A. Installation Must Comply With
- B. Field Wiring Terminations
- C. Field Wiring
- D. Line Voltage Wiring for Standard Boiler
- E. Alarm Connections
- F. Low Voltage Connections for Standard Boiler
- G. Thermostat
- H. Outdoor Sensor
- I. Indirect Sensor
- J. Optional 0-10 Volt Building Control Signal
- K. Optional UL353 Low Water Cut-Off Interface Kit
- L. Wiring of Cascade System Communication Bus
- M. Cascade Master Pump and Sensor Wiring
- N. Cascade Follower Pump and Sensor Wiring
- Part 8 - Gas Connections
- Part 9 - Start-Up Preparation
- A. Check / Control Water Chemistry
- B. Check for Gas Leaks
- C. Freeze Protection (When Used)
- D. Fill and Test Water System
- E. Purge Air from Water System
- F. Check Thermostat Circuit(s)
- G. Condensate Removal
- H. Final Checks Before Starting Boiler
- I. Setting Up a Single Boiler
- J. Setting Up a Cascaded System
- K. Lockout Condition
- L. Cascade System Programming
- Part 10 - Start-Up Procedure
- Part 11 - Start-Up Procedures for the Installer
- Part 12 - Troubleshooting
- Part 13 - Maintenance
- Part 14 - Shutdown
- Part 15 - Installation Checklist
- Part 16 - Maintenance Report
- Part 17 - Replacement Parts
LP-387 Rev. 011 Rel. 006 Date 6.28.19
13
• Hardness less than 7 grains (120 mg/L) (Water
temperatures of 140
o
F and greater)
• Hardness levels above the required amounts can lead to
lime scale build-up throughout the system. Water below 5
grains/gallon (85 mg/L) may be over softened.
• Consult local water treatment companies for unusually
hard water areas (above the required amounts) or for
other treatment solutions if water is being over softened
(below 5 grains/gallon [85 mg/L]).
• Chloride concentration less than 100 ppm (mg/L)
• Do not ll appliance or operate with water containing
chlorides in excess of 100 ppm (mg/L).
• Using chlorinated fresh water should be acceptable as
levels are typically less than 5 ppm (mg/L).
• Do not connect the appliance to directly heat swimming
pool or spa water.
• Total Dissolved Solids (TDS) less than 500 ppm (mg/L)
• Total dissolved solids are minerals, salts, metals, and
charged particles that are dissolved in water.
• The greater the amounts of TDS present, the higher the
corrosion potential due to increased conductivity in the
water.
• If using softened water to ll the appliance, it is still
possible to have high TDS. This water can be corrosive.
Consult local water treatment companies for other
treatment solutions to reduce this eect.
*NOTE: It is recommended to clean the heat exchanger at least
once a year to prevent lime scale buildup. To clean the heat
exchanger, follow the maintenance procedure in this manual.