750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
5-11
5.8 — IFGR Setup
15. Investigate and correct the cause of the valve leakage before relighting the burner.
When the conditions covered in Section 5.7 and in Sections 5.1, 5.2, and 5.3 are assured, the burner is ready for fir-
ing. Refer to Section 5.8 for further starting and operating information.
5.8 — IFGR Setup
It is recommended that the final “installed” settings be recorded for future reference. The settings should be
marked on the linkage as well.
Normally, once the system has been set and adjusted, the settings should not be changed unless conditions (includ-
ing boiler settings) change. In that case, it will be necessary to contact your local Cleaver-Brooks authorized repre-
sentative for assistance.
After the IFGR system is initially set up, it will start up with the boiler as an integrated boiler system. After shut-
down periods in which maintenance and/or adjustments have been performed on the fuel cams, fuel and air link-
ages, or IFGR control linkages, the recommended approach to startup is as follows:
1. Set all boiler components to their initial settings as discussed in the appropriate chapters of this manual.
2. Check fan impeller and motor rotation. Correct rotation is counterclockwise when viewed from the front of the
boiler.
3. Verify that all the IFGR components are set to the settings recorded on the Startup Report (as noted by the
Cleaver-Brooks authorized representative during original set up). Be sure that all linkages are secure.
4. Start and warm the boiler as described in this manual.
5. Adjust the boiler components as described in this manual to achieve proper boiler operation.
Refer to Chapter 8 for instructions on cassette removal and installation.
NOTE: The main gas valve should provide a tight seal, provided nothing prevents tight closure. Foreign material may
be present in either the new or renovated gas lines unless adequate care is taken in cleaning and purging.
NOTE: Initial IFGR linkage settings and adjustments must be established by a Cleaver-Brooks authorized representa-
tive. Setup of the LE option requires simultaneous consideration of air-to-fuel ratios and NO
X
levels. This can only be
accomplished with proper combustion emissions monitoring equipment with NO
X
, O
2
, CO, and smoke spot measur-
ing capability.
NOTE: The IFGR system can be equipped with either a single or dual linkage arm, depending on the number of fuels
used and the NO
X
levels desired. All single-fueled boilers have a single drive arm. Dual-fueled boilers may or may not
have a dual arm, depending on the options purchased.
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