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Ver 2_en_2022-06-27
Assembly Instructions
Envistar Flex
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8 CONNECT COIL, WATER
8.1
Connect coil to pipelines
• In order not to damage the coil, always use a counterhold when connec-
ting.
• Ensure that connecting pipes (including insulation) do not block inspec-
tion hatches.
00066
Figure: Pipe connection counterhold
8.2
Connect heating coil
1. Connect coil to pipeline.
2. Connect frost protection on heating coil.
3. Connect pipes for bleeding and drainage.
8.2.1 Heating coil (ELEV) in unit, (EMT-VV) in duct
00067
A
B
B
A
Figure: Connection pipe, heating coil (ELEV, EMT-VV)
A. Fluid in
B. Fluid out
The heating coil must be fitted with frost protection of the clamp on or immersion sensor type.
The heating coil is reversible to suit air from the right or left. Ensure that the coil is turned so
that there is a counter-flow direction between air and liquid flow.
Thermoguard coils:
• are marked with inlet and outlet, respectively, on the fluid side, as well as air direction.
• delivered, as standard, for vertical assembly (horizontal air stream).
• must always have the possibility of pressure relief via the coil return line out to the expan-
sion vessel, regardless of whether the control valve is open or closed. This applies to all
kinds of control valves, shunt couplings and the like.
