CleaverBrooks 4WI, Руководство по эксплуатации, обслуживанию и запасным частям

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Starting and Operating Instructions
5-10 750-211 (revised 2009)
Promethean Boilers, Model 4WI Manual
5.7 — Firing Preparations for Gas (Series 200-400-700)
•
Prior to initial starting, check the linkage attached to the gas butterfly valve to assure that movement is free from
binding.
•
Verify the presence and availability of gas. On a new installation, representatives of the gas utility should be
present when gas first flows into the system to supervise purging of the new gas line, unless they have already
done so.
•
Determine that the pilot is operating properly, as outlined in Section 5.3.
•
Determine that sufficient pressure exists at the entrance to the gas train by installing a test gauge downstream of
the regulator.
•
The gas pressure regulator must be adjusted to the proper pressure level. Since the regulator is generally sup-
plied by others, adjustment should proceed according to instructions supplied by its manufacturer.
It is necessary for the operator to know the burner requirements in gas quantity and pressure.
The information can generally be found on the Dimension Diagram (DD) supplied by Cleaver-Brooks for the spe-
cific installation. Should the information not be readily available, consult the Cleaver-Brooks Service Department
and be ready to provide the boiler serial number.
Chapter 6 contains additional information along with standard gas flow and pressure requirements.
•
If the burner is a combination fuel model, set the gas/oil switch to
“gas.” Withdraw the oil burner gun and latch it in its rearward (lock-
out) position.
•
On initial startup, it is recommended that the main gas shutoff cock
remains closed until the programmer has cycled through pre-purge
and pilot sequences. When the fuel light on the control panel comes
on, observe the action of the motorized gas valve stem to determine
that it opens when energized.
FIGURE 5-11.
Oil Gun in the Lock-Out Position
As soon as it is confirmed, turn the burner switch “off ” and let the programmer finish its cycle. Check that the gas
valve has closed. Again, turn the burner “on.” When the fuel valve light glows, slowly open the main gas cock. Main
flame should ignite unless there is air present in the line. If the flame is not established within about 5 seconds, turn
the burner switch “off ” and allow the programmer to recycle normally for a new lighting trial. Several efforts may
be necessary to “bleed” air from the line.
Do not repeat unsuccessful lighting attempts without re-checking the burner and pilot adjustments. Failure to follow
these instructions could result in serious injury or death.
!
Warning