Boiler Operation; Thermostat Installation; Wire Duct And Control Box View - Smith Cast Iron Boilers GB300 Installation & Operating Manual

GB300 BOILER INSTALLATION AND OPERATION INSTRUCTIONS
Use the factory supplied wiring schematic booklet to
connect power to the boiler. The schematic booklet also
depicts how to interconnect the boiler controls, using the
supplied wire harness. Before connecting any harnesses,
the control panel and wire duct must be attached to the
boiler using the supplied fasteners. There are prepunched
holes in the jacket panel to help locate and install these
components. Use as many fasteners as required to
secure control panel and wire duct to front jacket panel.
Prepunched holes are for locating purposes only and
may not securely fasten components. Run the wire
harnesses inside the plastic wire duct between
termination points, see Figure 102. Instructions for
cutting, locating and mounting the wire duct can be found
in the electrical book. The wire harnesses' identification
and mounting location information can also be found in
the electrical wiring diagram book.
Figure 102

Thermostat Installation

If a thermostat is to be used to control the boiler always
follow the instructions included with the thermostat.
Proper location of the thermostat will ensure efficient
trouble-free operation of the boiler. Mount the thermostat
to an inside wall at a height approximately five feet above
the floor. Avoid placing the thermostat in areas that will
not provide an accurate measurement of the room
temperature. Locating the thermostat behind a door, in
an alcove, close to a source of thermal radiation or in a
drafty area will cause poor or sporadic heating.
Wire Duct and Control Box

BOILER OPERATION

WARNING: Before proceeding read and fully
understand the instructions contained in this
manual. Do not attempt to operate this boiler if
it has not been installed in accordance with the
guidelines set forth in this manual. Failure to
comply with this warning can result in extensive
property damage, severe personal injury or
death!
Water Boilers
Fill the boiler and all of the radiation with water to the
required system pressure. Completely purge the system
of air and adjust the system pressure as needed.
Steam Boilers
Fill the boiler with water to a level 1" below the normal
water level line of 33 1/4". Clean the newly installed
sections as outlined below:
CAUTION: Do NOT use any petroleum based
cleaners to clean the boiler or the hydronic seals will
be damaged!
1. Pipe the skimmer tapping on the front of one of the
end sections to a floor drain using 1 1/2" pipe.
2. Adjust the boiler water level until water begins to
flow out of the skim piping at a slow rate.
3. Fire the boiler and maintain a water temperature of
180°F to 200°F. It may be necessary to cycle the boiler.
4. Adjust the water feed to prevent the build up of
pressure within the boiler. Continue the skimming process
until the discharge runs clear.
5. Shut the boiler off and allow the boiler to cool to
100°F. Remove the skim piping and plug the tapping.
Open the blowdown valve and flush the boiler until the
discharge runs clear.
6. Close the blowdown valve and fill the boiler with
water to a level 1" below the normal water level line.
7. Check the traps and vents for proper operation.
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