Dunkirk D249 Series Commercial Boiler - Manual (Page 2)

Your commercial boiler is furnished with combustion side
water or steam controls to meet our interpretation of the
American Society of Mechanical Engineers (ASME) Safety
Code for Controls and Safety Devices for Automatically
Fired Boilers, No. CSD-1.
Installation shall conform to the requirements of the
authority having jurisdiction, or, in the absence of such
requirements, to the National Fuel Gas Code, ANSI-Z223.1/
NFPA-54 (latest revision). Where required by the authority
having jurisdiction, the installation shall conform to the
American Society of Mechanical Engineers (ASME) Safety
Code for Controls and Safety Devices for Automatically Fire
Boilers, No. CSD-1.
CSD-1 controls and this installation may be subject to
approval by local inspectors. Additional parts or equipment
may be required. Consult local authorities having
jurisdiction before the installation of the boiler.
CSD-1 controls furnished with commercial boilers are
applicable to boilers with inputs above 400,000 Btu/hr.
(Models 500-1500)
Additional parts required by CSD-1 standards may be
necessary to make this boiler compliant. This supplemental
instruction manual should be used in conjunction with the
Installation, Operation and Maintenance manual for your
specific boiler.
CSD-1 Component Installation
Based on parts listed in Installation, Operation and
Maintenance manual for your particular boiler, the following
changes should be made:
Complete Boiler Material List - See Table #1: CSD-1
Complete Boiler Material List.
Combustion Side Control :
• Models 300 and 400, no changes are required to
existing gas trains.
• Models 500 through 1500 requirements include:
A. Intermittent pilot control module is required to
have maximum 15 second pilot flame establishing
period and ability to perform safety shutdown and
lockout in event of loss of flame signal at pilot.
B. The intermittent pilot module and manual reset
switch are used to replace the existing pilot
module.
C. Also, an independent pilot gas line which includes
manual shutoff valve, pressure regulator and
safety shutoff valve, two leak test valves on
main gas valve, and manual shutoff valve located
downstream of the main gas valve are added. See
See Table #2: CSD-1 Component Carton Material List
for component carton material list which replaces the
corresponding list in the installation manuals.
• See Table #3: CSD-1 Electronic Ignition Base Material
List.
• Installed locations of additional components see Figures
1a and 1b.
For CSD-1 combustion side control, light off sequence is as
follows:
1. Turn on power. Set thermostat to call for heat.
2. Ignition starts to spark and lights pilot flame.
3. Ignition continues sparking about 12 seconds after pilot
lights.
4. Main burners ignite.
NOTICE
A longer pilot flame recognition time is a design
feature of this module and is correct.
Gas Pressure Requirements
• Maximum allowable inlet gas pressure (natural gas
only) to controls in CSD-1 gas train is 14” w.c. (½
psig).
• Verify inlet gas pressure is at least 5” w.c. but no
greater than 14” w.c.
• If gas pressure entering the building is greater than 14”
w.c., installing contractor must provide overpressure
protection on downstream piping to prevent buildup of
downstream pressures in excess of 14” w.c. in event
the fuel system pressure regulator fails.
• Alternatively, gas pressure entering the building may
be reduced with additional gas pressure regulator
outdoors. If inlet gas pressure to this additional
regulator is less than 14” w.c., then overpressure
protection may not be required.
• Consult local authority(s) having jurisdiction before
installing gas supply piping to the boiler.
CSD-1 COMMERCIAL BOILER CONTROLS
WARNING
Fire, explosion, asphyxiation and electrical shock
hazard. Improper installation could result in death
or serious injury. Read this manual and understand
all requirements before beginning installation.
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