Carrier Moduline 37HS Series - Checking Duct Pressure and Unit Bellows; To Check Duct Pressure; Checking Unit Bellows for Leaks

To Check Duct Pressure — To check duct pressure
on master unit, remove the volume controller from the filter
and connect a Magnehelic gage tube to the filter high-
pressure port (shown on Fig. 31). After checking, replace vol-
ume controller. Check the slave unit by removing the plug
from the high-pressure port on the slave unit (shown on Fig. 28)
and connecting the Magnehelic gage tube. Replace plug af-
ter checking.
See Table 6 for minimum required duct pressures at vari-
ous air quantities.
0
1
2
3
4
5
6
MAGNEHELIC
OF WATER
®
BLOW INTO
THIS TUBE,
CLOSE OFF
METAL "T"
DIFFUSER
BELLOWS
CONNECTION
Fig. 41 — Checking Unit Bellows for Leaks
30