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Water Cut-off controls, particularly installing,
operating and servicing.
2.4.6 OTHER CONTROLS
Additional controls as required for the particular
installation may also be provided. Refer to the
literature on these devices included in the Boiler
Manual. All such devices must be operationally
tested to assure reliable operation of the boiler
and system.
2.4.7 BOILER FEED SYSTEM
The boiler feed pump must be operationally
tested to assure that it can provide boiler
feedwater at the pressure and in the amount
needed for safe and reliable boiler operation.
2.4.8 CHEMICAL FEED SYSTEM & SOFTENER
Check the performance of the boiler water
softener and chemical treatment system.
Chemically test the feedwater to be certain it
complies with the recommendations of the
chemical treatment consultant.
2.5 RECOMMENDED DRAFT AND COMBUSTION READINGS
ATMOSPHERIC GAS-FIRED BOILERS
BOILER SERIES
DRAFT AT BOILER
OUTLET
(i.w.c.)
CO
2
@ HIGH
FIRE
O
2
@
HIGH FIRE
CO
(ppm)
SMOKE
NO.
F -0.01 TO -0.04 7.5 TO 8.5 % 5.0 TO 7.5 % < 400 0
CL -0.02 TO -0.04 7.5 TO 9.0 % 4.8 TO 7.5 % < 400 0
K -0.02 TO -0.06 8.0 TO 9.5 % 4.0 TO 6.7 % < 400 0
FORCED DRAFT GAS FIRED BOILERS
BOILER SERIES
DRAFT AT
BOILER
OUTLET (i.w.c.)
CO
2
@
HIGH FIRE
O
2
@
HIGH FIRE
CO
(ppm)
SMOKE
NO.
D -0.01 TO -0.04 7.5 TO 9.5 % 4.0 TO 7.5 % < 400 0
HED -0.01 TO -0.04 7.5 TO 9.5 % 4.0 TO 7.5 % < 400 0
CL 0.0 TO -0.04 8.5 TO 10.0 % 3.2 TO 5.0 % < 400 0
HECL 0.0 TO -0.06 8.5 TO 10.0 % 3.2 TO 5.0 % < 400 0
RV & RW +0.50 TO -0.10 9.0 TO 10.0 % 3.2 TO 5.0 % < 400 0
AB +0.25 TO -0.06 9.0 TO 10.0 % 3.2 TO 5.0 % < 400 0