Partial Isolation Of Boilers In Cascade Systems - FULTON FHE-250 Installation, Operation & Maintenance Manual

4
6. Check the gas rate and measure the combustion CO/CO
gas on each module should not be greater than 0.004. The CO
following figures:
Flue Gas CO
G20/LNG
Carry out functional checks as appropriate.
4.3

PARTIAL ISOLATION OF BOILERS IN CASCADE SYSTEMS

It is possible to continue normal operation of the boilers without any changes to the wiring,
in the event that one of the boilers in the chain is either not in working condition, or is under
maintenance. Perform one of the following procedures depending on which boiler is not in
service.
Note:
a) All changes to terminals as listed below are in accordance with the terminal number tables in Section 2.19.2
of this manual.
b) The letter "N" below indicates the total number of installed boilers.
Always isolate all of the boilers from the main electrical supply before
1. Remove the lower front panel of any boilers requiring changes, to access the necessary
electrical terminals.
2. After any changes on boiler setup always perform an Auto Detection procedure as detailed in
Section 3.8.7 of this manual.
Page 44
@ Max Rate %
2
@ Min. Rate %
!
WARNING
executing these procedures.
FHE-250 MANUAL 09 2014 ISSUE 2
content. The CO/CO
2
values should be correct to the
2
250 kW
9.0 ± 0.3
9.0 ± 0.3
*Same values apply to
models 500, 750 and 1000.
ratio of the flue
2