Fieldpiece HG2 - HVAC Guide System Analyzer Instrukcja Użytkownika Pobierz pdf (Strona 21)

WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.F

ELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.C

5.401 Air ow OK:  e indoor coil air ow was di-

rectly measured using the TrueFlow® grid and is

OK.

5.402 Probable OK air ow:  e indoor coil air-

 ow was tested by an indirect means (temperature

split) and is probably OK.

5.403 Air ow unknown, check air ow:  e

measurements are insu cient to diagnose the in-

door coil air ow. Either measure the Return Ple-

num Dry Bulb, Wet Bulb and Supply Plenum Dry

Bulb or use a True Flow Plate.

5.404 Low air ow, increase air ow until actu-

al temp split matches target temp split:  e

indoor coil air ow is low based on the temperature

split. Check the  lter and coil, inspect for any re-

strictions and blockages. Make sure all registers are

open. If the air ow remains low, consider increased

blower speed and duct system modi cations. Sup-

ply and return plenum static pressures can be used

to diagnose the causes of low air ow.

5.405 Low air ow, increase air ow:  e indoor

coil air ow was directly measured using the True-

Flow grid and is low. Check the  lter and coil, in-

spect for any restrictions and blockages. Make sure

all registers are open. If the air ow remains low,

consider increased blower speed and duct system

modi cations. Supply and return plenum static

pressures can be used to diagnose the causes of low

air ow.

5.406 Low capacity or possible high air ow,

measure air ow directly:  e temperature

split is low.  is usually means that the capacity of

the system has been reduced due to incorrect refrig-

erant charge. Higher than expected air ow is rare,

but does occur occasionally. Measuring the air ow

directly would identify if high air ow is the cause of

the low temperature split.

The diagnosis are displayed in order

of likelihood.

Shows you where in this manual

you can get more information about

what the diagnosis means and how

to correct the problems.

5.3 CheckMe!® OUTPUT FORM Overview

Figure 21. CheckMe!® OUTPUT FORM.

Press the OUTPUT for the CheckMe!® OUTPUT

FORM.

 e diagnoses and recommendations are listed in

order with the most likely diagnosis  rst.

Because all parts of an A/C system are inter-depen-

dent, changes made to one part of the system can af-

fect other parts of the system. For example, increasing

air ow may increase the superheat, which may require

adding refrigerant. To be e cient, continually check the

superheat and/or subcooling as you make refrigerant

charge adjustments. A er  nal modi cations, allow 15

minutes to stabilize before your  nal test.

5.4 Indoor Coil Air ow

Low air ow across the inside coil is one of the most

common problems and should be corrected before  nal

decisions are made about refrigerant charge or many

other issues. Air ows in moist and wet climates should

usually be between 300 to 350 cfm per ton. Air ows in

Dry climates are limited by the rapidly increasing watt

draw of the fan motor at higher air ows.

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 36 37

Komentarze do niniejszej Instrukcji

Brak uwag

Fieldpiece HG2 - HVAC Guide System Analyzer Instrukcja Użytkownika Strona 21

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Urządzenia pomiarowe Fieldpiece HG2 - HVAC Guide System Analyzer