Fieldpiece HG2 - HVAC Guide System Analyzer Manual de usuario descargar pdf (Pagina 16)

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4.2 Combustion INPUT FORM Overview

Figure 18. Combustion Test INPUT FORM.

Combustion gases should be sampled close to the exit

from the heat exchanger within an area where all gasses

would be well mixed and before dilution air enters the

venting systems i.e., dra hoods, barometric dampers, etc.

Testing within 18 inches of the breech is a typical location

for most oil- red equipment. If the appliance is an atmo-

spheric gas with a dra hood, the test would be taken in

the top  ue passage prior to mixing with dilution air.

A er testing is complete, the hole in the  ue/stack

must be patched with temperature silicone or a compa-

rable plug.

Fuel: Select Natural Gas, Oil #2 or Propane for the fuel

type of the system or appliance.

Type: Default: Condensing. Other selection: Non-Con-

densing.  e presence of a condensate line indicates

a condensing unit, otherwise it is a non-condensing

unit.

: Connect the AOX2 with the switch on %O

and take

a sample of the combustion products in the  ue/stack

(within 18 inches from the start of the  ue).

Flue Temp: Connect the ATR1 temperature probe to

the AOX2. Set the AOX2 on TEMP and measure the

temperature of the combustion products in the  ue/

stack (18 inches from the start of the  ue).

CO: Connect the ACM3 and take a sample of the com-

bustion products in the  ue/stack in the same location

as the O2% measurement (within 18" from the start of

the  ue).

Primary Temp: Measure the temperature of the air

being introduced to the combustion process. Measure

the air temperature as close as possible to the entry

point of the appliance.

4.3 Combustion OUTPUT FORM Overview

Figure 19. Combustion Test OUTPUT FORM.

Press OUTPUT for the Combustion OUTPUT

FORM.

:  e %CO

in the combustion products.

Excess O

:  e amount of O

above the minimum

theoretical amount needed for complete combus-

tion. For complete and e cient combustion, excess

must be adjusted to manufacturer’s speci ca-

tions.

COAF (carbon monoxide air free):  e amount of CO

in the combustion products taking into account the

dilution e ect of excess O

Net Temp:  e stack (vent) temperature minus the

primary air temperature.

Standard E (E ciency):  e actual e ciency of the

combustion equipment calculated by analyzing the

losses up the exhaust.

Siegert E (E ciency):  e European standard for

combustion e ciency.

Select the Fuel and what type of

equipment you are working on.

Can be measured automatically with

Fieldpiece accessory heads.

Customer ID is useful for record keeping.

Sections of manual with more

information about this test.

Modify combustion equipment

to bring these calculations to the

manufacturer's specifications.

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 36 37

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