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34000 Autry Street, Livonia, MI 48150 • 800.968.5530 • Fax 734.419.0209 • www.hamiltonengineering.com • LIT91178 REV 5/2017

Page 6 of 9

Trytokeepthemeasuringhoseatwith

the inner wall of the pipe. Use a small

opening to insure you are measuring

static pressure and not velocity pressure

P(1,2,3)A

These will be negative pressures relative to atmosphere

P(1,2,3)F

These will be positive pressures relative to atmosphere

Example

P1A = -0.32” wc

P1F = 0.4” wc

Then the total pressure drop is:

∆Ptotal=-(P1A)+P1F=-0.32+0.4=0.72”wc

Calculations are done with:

•Allboilersathighre

•Watertemperature160/180ºF(givesthehottestuegasses)

• All readings must be taken with boiler front cover installed

Doing the measurements under these conditions will give the most accurate results. There may be minor differences between appliances.

Use of a static pressure

tip for measurement is

also recommended

• A pH test must be performed at the exit point of the condensate neutralizer with litmus paper to test for

acidity. pH level should be within 6.6-7.0. If the pH is less than 6.6, replace neutralizing medium.

 •Checkingtheminimumandmaximumsettingsonthedisplaymustbeperformedasanalcheck.

 •Allndingsandconcernsshouldbediscussedwiththeapplianceowneraftertheinspectioniscomplete.

ANNUAL INSPECTION CONT.

Hamilton Engineering EVO 299 User Manual

Questions and Answers: