CleaverBrooks CB Ohio Special 100 HP, Operation, Service And Parts Manual

Page: 19 / 200

Chapter 1 — Basics of Firetube Operation
Part No. 750-184 1-11
G. CB OHIO SPECIAL
The model numbers CB125S - CB225S indicate boilers built by
Cleaver-Brooks specifically for the State of Ohio market. These
boilers comply with state rules and regulations applying to boilers
with less than 359 square feet of heating surface.
The CB-OS is not a low-emission design and therefore lacks the flue
gas recirculation components found on the CB-LE. Other differences
are noted below and elsewhere throughout this manual. Unless
indicated otherwise, information in this manual regarding boiler
operation, maintenance, and parts applies equally to CB-LE and
CB-OS models.
Two Pass Design
The principal difference between the Ohio boilers and CB-LE boilers
in the corresponding size range is the construction of the pressure
vessel. Ohio Special boilers (identified by an “S” suffixed to the
model number) are of a two-pass design, as opposed to the four-
pass design of the CB-LE.
Rear Head
Due to the two-pass design of the Ohio boiler, the rear head lacks
the baffle found on comparable CB-LE boilers. The upper portion of
Figure 1-7
IFGR Damper Linkage
SINGLE FUEL ARRANGEMENT
IFGR DAMPER CONTROL
JACKSHAFT
GAS JACKSHAFT DRIVE ARM
DUAL FUEL ARRANGEMENT
30
° *
60
° *
OVER-TRAVEL MECHANISM
JACKSHAFT LINKAGE ROD
QUICK-DISCONNECT LINKAGE
OIL JACKSHAFT DRIVE ARM
PROXIMITY SWITCH JACKSHAFT ARM
*
NOMINAL: ACTUAL POSITION VARIES
NOx REQUIREMENT WITH
AND 60 PPM SYSTEM
(Except 60 ppm)