AM, EM, AQ, BA, ASW - IOM
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Ing.Ji
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í Jiránek
3.2.3 Liquid and Vapor Lines
After connecting the circuits using the distributor and collector, the Heat Pump is connected
using the liquid and vapour piping. Diameter and maximum length is in the following table.
HP type
D Vapour
[mm]
d Liquid
[mm]
max. length
[m]
AQ26ZD
22x1(7/8“)
12x1 (1/2“)
15
AQ30ZD
22x1(7/8“)
12x1 (1/2“)
15
AQ37ZD
22x1(7/8“)
12x1 (1/2“)
15
AQ45ZD
22x1(7/8“)
12x1 (1/2“)
15
AQ50ZD
22x1(7/8“)
12x1 (1/2“)
15
AQ60ZD
28x1
15x1
25
3.2.4 Ground Loop Installation
The piping is installed app. 40cm under the frost depth, that is 1,2 to 1,6m deep, depending on
the location. The spacing of the piping is to be 60 to 80cm.
Instructions to be followed:
• In the case the land is slope, the piping must be installed in such direction that from a
half of its length it is descending in the direction from the distributor toward the collector
to make sure the oil returns to the compressor
• Always use only the Cu roller-type pipe cutter for cutting the piping, never use a saw
• Cut the piping immediately prior to connecting operation
• Remove the plugs no sooner than immediately prior to connecting/welding operation
• Never leave the piping and components open to the atmosphere, not even for a short
time
• During bending pay attention that the piping is not deformed (narrowed), always use
special equipment and tools
• In the case the collector is to be connected later, remove the plastic plugs, flatten the
piping ends and weld them carefully to prevent water from entering the piping in the case
the underground water rises
1,2-1,6m
sand bed
ground loop tube
60–80cm 60–80cm 60–80cm
Ground loop for direct evaporating heat pump.
