Fig. 36 — module pressure drop – Carrier 48MA User Manual
Page 49
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1
Determine zone module air quantity as described in the
Selection Procedure (1000 cfm)
2
Enter curve at determined zone moduie air quantity Project left
to intersect with entering air temperature curve (70 F)
3
From this intersection, project up to intersect with entering
water temperature (180 F)
4. From this intersection,project right to intersect with Water Flow
Rate (4 gpm).
5 From this intersection, project down to read Zone Module
Fleating Capacity (49,500 Btuh)
When
using
soiution
mixtures
above
20%
glycol
concentration,
reduce the capacity using the correction factor
i e If 30% glycol concentration applies to the example,
Corrected Zone Module Fleating Capacity
= Zone Module Fleating Capacity x Correction Factor
= 49,500
X
0 985
= 48,750 Btuh
See Fig 36 The Ap at 4 gpm is 8 2 psig
Fig. 35 — Hot Water/Glycol Heating Capacities (Hot Water with 20% Ethylene Glycol Solution)
Fig. 36 — Module Pressure Drop
47