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
18
The chart below represents various system design temperature rise through the boiler along with respective ows and friction loss. This is
provided to aid in circulator selection.
System Temperature Rise Chart
20°Δt 25°Δt 30°Δt
Model Friction Ft Flow Rate (GPM) Friction Ft Flow Rate (GPM) Friction Ft Flow Rate (GPM)
55 1.8’ 5.3 1.1’ 4.2 0.8’ 3.5
80 2.8’ 8.2 1.9’ 6.5 1.3’ 5.4
110 4.3’ 10.6 2.9’ 8.4 1.8’ 7
155 2.5’ 14.6 1.7’ 11.7 1.3’ 9.7
199 3.7’ 18.7 2.6’ 15 1.9’ 12.5
285 7’ 26.8 4.7’ 21.4 3.5’ 17.9
399 9.5’ 37.5 7.1’ 30 5.7’ 25
Table 6 - Temperature Rise, Friction Ft and Flow Rate
Figure 7 - Boiler Pressure Drop
The chart below represents the combined ow rates and pipe sizes when using multiple boilers to design the manifold system for the primary
circuit. To size, simply add up the number of boilers and the required ow rates for the system design temperature.
Example: (5) 55 Model boilers with a design of 20°Δt degree temperature rise with each boiler having an individual ow rate of 5.3 GPM. To
correctly size the manifold feeding these (5) boilers you would need a pipe size of 2”.
Multiple Boiler Manifold Piping
Maximum Flow Rate
(GPM at 3 Feet per Second)
8 14 19 31.5 45 69 93 120 150 188 271
Schedule 40 Pipe Dia. (In.) 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 4 1/2 5 6
Table 7 - Multiple Boiler Manifold Piping