5.3102.24 Advanced Combustion Controls

Topic: 
Hydronic Heating (Hot Water and Steam)
Subtopic: 
Equipment Installation
Desired Outcome: 
Optimized boiler efficiency
For supporting material, see Referenced Standards.
TitleSpecification(s)Objective(s)
5.3102.24a
Draft controls

Assessment:

Feasibility of installing specified draft controls will be determined by site conditions

Installation:

Factory-installed draft devices in the boiler will be set, adjusted, and coordinated with the newly added draft control device

Draft controls will be installed in accordance with manufacturer specifications regarding location and configuration

If motorized, draft device components (e.g., pressure sensors) will be installed in accordance with manufacturer specifications and interlocked with burner operation

Motorized damper will fully close when burner is not operating

Hard piping will be used where pressure measurements/signals are required for proper operation

Startup and test of any advanced draft control device will be performed by factory-authorized technician

Testing:

Draft control and excess air will be tested to verify they are operating within their required ranges

Testing will be performed for firing ranges specified in the scope of work and when burner is not firing

Testing will be performed to confirm burner is interlocked with controller

Ensure feasibility of the work order

Minimize overdrafting

Optimize efficiency

5.3102.24b
Linkage-less burner control with variable frequency drive (VFD)

Assessment:

Feasibility of installing specified linkage-less burner/ VFD controls will be determined by site conditions

Installation:

Linkage-less burner control(s)/ VFD will be installed in accordance with manufacturer specifications

Linkage-less burner control/ VFD will be installed to operate within the burner manufacturer-specified turndown ratio

Startup and testing of any linkage-less burner control device/VFD will be performed by factory-authorized technician

VFD will be controlled in accordance with linkage-less burner control manufacturer specifications

Testing:

Linkage-less burner control, VFD, and excess air will be tested to verify they are operating within required ranges

Testing will be performed for firing ranges specified in the scope of work

Linkage-less burner controls/ VFD will be tested with all fuel types

Ensure feasibility of the work order

Minimize excess air

Optimize efficiency

5.3102.24c
Oxygen (O2) trim

Assessment:

Feasibility of installing specified oxygen (O2) trim will be determined by site conditions

Installation:

O2 trim controls and required accessories (e.g., O2 sensors) will be installed in accordance with manufacturer specifications

O2 trim control will be installed to operate within both the burner and O2 trim control manufacturer-specified turndown ratio

Startup and testing of any O2 trim control device will be performed by factory-authorized technician; where a factory-authorized technician is not available, this work will be performed by "qualified person," as defined by NFPA NFPA National Fire Protection Association, www.nfpa.org 31, 3.3.50

O2 trim, VFD, and linkage-less control will be interlocked and coordinated in accordance with manufacturer specifications

Testing:

Testing will be done to verify that O2 level is maintained in accordance with manufacturer specification throughout the burner firing range

Testing will be done to verify that O2 level is maintained in accordance with manufacturer specification during mild weather and extreme cold/design temperatures before warranty period ends

Linkage-less burner controls/VFD/O2 trim control will be tested with all fuel types anticipated for use in the application

Ensure feasibility of the work order

Minimize excess air

Optimize efficiency

5.3102.24d
Education

Property manager will be educated on the cleaning, calibration, and maintenance of all sensors and gauges in accordance with manufacturer specifications

Maintain peak performance