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Glycol Concentrations
Food grade mono propylene glycol should only be used with this unit. The
freeze point of glycol depends on the concentration of glycol to clean water
mixture. If insufficient concentrations of glycol are used, the system may
freeze.
Glycol Concentration for Glycol Bath
It is recommended that a 50% glycol / 50% clean water mix is used for the
glycol bath. This will protect a system down to –15
°
C and below
Glycol Concentration for Heat Dumps
A 30% glycol / 70% clean water mix will protect the system down to –13
°
C.
The amount of glycol required for the heat dump, Add 2.5 pints (1.4 Litres) for
the glycol tank to the length of pipe work as shown in the following table:
Glycol Quantities for Heat Dump Pipe Work Length (flow and return)*
Feet
10
20
30
40
50
60
70
80
90
10
11
12
13
14
17
19
Pints
.5
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0
Metres
3
6
9
12
15
18
21
24
27
30
33
36
39
42
45
48
Litres
.3
.6
.9
1.2 1.5 1.8 2.1 2.4 2.7 3.0 3.3 3.6 3.9 4.2 4.5 4.8
*based on the use of the correctly specified tube with an internal bore of
10mm
