
Page 39
Operation and Maintenance
Envistar Top 04-21
DSET.190501.01.EN
Continuous product development may give rise to specification changes without notice.
For units (code TER/TXR), the purging sector function must be ensured by
checking that the under pressure P3 is greater than the pressure P2 (min.
diff 25 Pa). Otherwise an ETSP-TR trim damper can be used on the extract
air side in order to throttle in the correct pressure balance.
Example:
Measurement outlets for P2: Downstream supply air fan (SF) generates
negative pressure in relation to the atmospheric pressure (atm), e.g. -100 Pa
Measurement outlets for P3: Downstream extract air fan (EF) and any trim
damper generate greater negative pressure than at P2, e.g. -125 Pa.
–
+
25 Pa
P3
P2
-100
Pa
-125
Pa
P1
P4
P
≈
1 atm
(101 kPa)
Trim damper
Measurement outlets for pressure balance – unit with control equipment (code MX).
–
+
–
+
25 Pa
P3
P2
-100
Pa
-125
Pa
P1
P4
P
≈
1 atm
(101 kPa)
Trim damper
Measurement outlets for pressure balance – unit without control equipment (code UC, MK, US).
Содержание Envistar Top 04-21
Страница 1: ...Operation and Maintenance Envistar Top Order number Project ...
Страница 2: ...Translation of the original instructions ...
Страница 63: ......