IM 1137-4 • TEMPLIFIER
®
MODEL TGZ
12 www.DaikinApplied.com
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Figure 9: Flow Switch
Figure 10: Flow Switch (view from end of cooler)
Glycol Solutions
The use of glycol in Templifier systems is rare, but if used, the
system glycol capacity, glycol solution flow rate in gpm (Lps),
pressure drop through the cooler, and system pressure drop
can be calculated using the following formulas and table.
1. Capacity — Capacity is reduced from that with plain water.
To find the reduced value multiply the unit’s water system
capacity by the capacity correction factor C, as shown in Table
4 and Table 5, to find the unit’s capacity in the glycol system.
2. GPM —To determine evaporator gpm (or ΔT) knowing ΔT (or
gpm) and capacity:
3. Pressure Drop — To determine glycol pressure drop through
the cooler, enter the proper water pressure drop curve,
beginning on
page 16
, at the water flow. Multiply the water
pressure drop found there by P to obtain corrected glycol
pressure drop.
4. To determine glycol system kW, multiply the water system
kW by factor K. Test coolant with a clean, accurate glycol
solution hydrometer to determine the freezing point. Obtain
percent glycol from the freezing point table below.
Daikin Applied encourages a minimum glycol concentration
of 25% be provided on all glycol applications. Glycol
concentrations below 25% have too little inhibitor content for
long-term corrosion protection of ferrous metals.
NOTE:
The effect of glycol in the condenser is negligible
and there is no capacity derate. There is a significant
increase in pressure drop.
Table 4: Ethylene Glycol
Table 5: Propylene Glycol
Table 6: Burst Protection
Freezing Point
P (Pressure
Drop)
% Glycol °F
°C
C (Capacity) K (Power) G (Flow)
20
18
-8
0.982
0.992
1.04
1.129
30
7
-14
0.972
0.986
1.074
1.181
40
-7
-22
0.961
0.976
1.121
1.263
50
-28
-33
0.946
0.966
1.178
1.308
Freezing Point
P (Pressure
Drop)
% Glycol °F
°C
C (Capacity) K (Power) G (Flow)
20
19
-7
0.975
0.985
1.028
1.147
30
9
-13
0.962
0.978
1.05
1.248
40
-5
-21
0.946
0.971
1.078
1.366
50
-27
-33
0.929
0.965
1.116
1.481
Percent Volume Glycol Concentration Required
Temp F (C)
For Burst Protection
Ethylene Glycol
Propylene Glycol
20 (6.7)
11
12
10 (-12.2)
17
20
0 (-17.8)
22
24
-10 (-23.3)
26
28
-20 (-28.9)
30
30
-30 (-34.4)
30
33
-40 (-40.0)
30
35
-50 (-45.6)
30
35
-60 (-51.1)
30
35