DM14-01.01.18en
MIV V5 Heat Recovery DC Inverter R410A
MS Unit Installation
140
5.6 Airtight test
The refrigerant pipe after installation and before connect to the outdoor unit, it must undergo the airtight test
with 3.92 MPa nitrogen for 24 hours from the low pressure gas pipe, high pressure gas pipe and liquid pipe.
5.7 Air purging
Connect the refrigerant pipe with the low pressure gas pipe, high pressure gas pipe, and liquid pipe of the
outdoor unit. Use a vacuum pump, to vacuum from the low pressure gas pipe, high pressure gas pipe, and
liquid pipe of the outdoor unit.
5.8 Open/close the valves
Open/Close the spools or the valves of outdoor unit with a hexagon spanner.
5.9 Thermal insulation
To process the thermal insulation for air side and liquid side piping. Please insulted the air side and liquid side
piping completely, in the reason of during operate cooling mode the ambient temperature is very low.
Thermal insulation at least 120
o
C material shall be applied for air side piping.
Apply attached thermal insulation material to wrap the connective part of indoor piping tightly without gap.
6. Electric wiring installation
Note:
Special power shall be applied within rated voltage range. External circuit of this air conditioner must be
grounded that means power cable of outdoor unit shall be jointed with external grounding wire reliable.
Electric wiring must be done by professionals, and wiring according to the wiring label.
Fixing circuit must be wired with an a11-poledisconnection device at least 3mm switching distance of
contact.
Setting the electrical leakage device according to national regulation.
Power cables and signal wires shall be arranged orderly and be wired rational without mutual interfere,
and connective pipes and body of valves without mutual contact among them.
The attached connective wire is 10m, provided that the length were not long enough, you must replace it
by an appropriate length connective wire in the same specification. In a normal circumstance, it is not
allowed to overlapping the two wires, but welded fix and wrapped by insulation adhesive band is except.
All electric wiring is finished, you could input power as long as confirm that all wires connect are correct
and fix tightly.
Pipe connection from outdoor unit
Low pressure gas pipe
connection(Brazing)
High pressure gas pipe
connection(Brazing)
Liquid pipe connection(Brazing)
Pipe connection to intdoor unit
Liquid pipe(Flare)
Gas pipe(Flare)
Protect with wet
towel when brazing
Unit body
Subsidiary belt of thermal
insulation pump
Field piping side
Cut it from up to down
