Daikin 025D, Operating & Maintenance Manual

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6 AGZ 025D through 190D OMM 1166-1
Table 4, Ethylene Glycol Factors for Models AGZ 140D to 190D
% E.G.
Freeze Point
Capacity Power Flow PD
o
F
o
C
10 26 -3.3 0.994 0.998 1.038 1.101
20 18 -7.8 0.982 0.995 1.063 1.224
30 7 -13.9 0.970 0.992 1.095 1.358
40 -7 -21.7 0.955 0.987 1.134 1.536
50 -28 -33.3 0.939 0.983 1.184 1.755
Table 5, Propylene Glycol Factors for Models AGZ 140D to 190D
% P.G.
Freeze Point
Capacity Power Flow PD
o
F
o
C
10 26 -3.3 0.988 0.996 1.019 1.097
20 19 -7.2 0.972 0.992 1.035 1.201
30 9 -12.8 0.951 0.987 1.059 1.351
40 -5 -20.6 0.926 0.979 1.095 1.598
50 -27 -32.8 0.906 0.974 1.142 2.039
Altitude Correction Factors
Performance tables are based at sea level.
Elevations other than sea level affect the
performance of the unit. The decreased air
density will reduce condenser capacity
consequently reducing the unit's performance.
For performance at elevations other than sea
level, refer to Table 6 and Table 7.
Evaporator Temperature Drop
Factors
Performance tables are based on a 10°F (5°C)
temperature drop through the evaporator.
Adjustment factors for applications with
temperature ranges from 6°F to 16°F (3.3°C to
8.9°C) are in Table 6 and Table 7.
Temperature drops outside this 6°F to 16°F
(3.3°C to 8.9°C) range can affect the control
system's capability to maintain acceptable
control and are not recommended.
The maximum water temperature that can be
circulated through the evaporator in a non-
operating mode is 100°F (37.8°C).
Fouling Factor
Performance tables are based on water with a
fouling factor of:
) / 0176 . 0 ( / 0001 . 0
2 2
kW C m or BTU F hr ft
    
per ARI 550/590-98.
As fouling is increased, performance
decreases. For performance at other than
0.0001 (0.0176) fouling factor, refer to Table 6
or Table 7.
Foreign matter in the chilled water
system will adversely affect the heat
transfer capability of the evaporator
and could increase the pressure drop
and reduce the water flow. Maintain
proper water treatment to provide
optimum unit operation.