– 18 –
Split Inverter Air-to-Water Heat Pump
Danger of Equipment Damage. Avoid deep vacuum operation. Do not use compressors to evacuate a system. Extremely
low vacuums can cause internal arcing and compressor failure. Damage caused by deep vacuum operation will void warranty.
Evacuating the system of non−condensables is critical for proper operation of the unit. Non−condensables are defined as any gas
that will not condense under temperatures and pressures present during operation of an air conditioning system. Non−condensables
and water suction combine with refrigerant to produce substances that corrode copper piping and compressor parts.
Use a thermocouple or thermistor electronic vacuum gauge that is calibrated in microns. Use an instrument capable of
accurately measuring down to 50 microns.
Electric Shock Hazard. Can cause injury or death. Unit must be grounded in accordance with national and local codes.
Line voltage is present at all components when unit is not in operation on units with single-pole contactors. Disconnect all remote
electric power supplies before opening access panel. Unit may have multiple power supplies.
When the outdoor unit is delivered, the drain nozzle is placed on the body and the drain rubber plug is placed in the attachment.
It is important to note that during
defrost
cycle, the unit will produce significant condensation. The installation of the outdoor unit should
be mounted high enough to let condensate drain and not to freeze during winter months. Refer to unit clearance section of this manual
for proper heights.
Unit Installation
Hydronic
Piping
Installation
(Refer to piping diagram located in this document for individual component list and suggest piping arrangement)
1. Prior to startup, ensure all piping is clean and free of debris. Be sure to clean piping
separately (valve off) from units in order to not introduce any contaminates to the
system.
2. When tightening pipes please use two wrenches as shown in the diagram to properly
secure without causing damage to heat exchanger.
Customer shall inspect the water system on a regular basis
for
leaks and any
contaminants.
Installation Instructions
33
2
3
4
注意
Waterway
installation
attentions
(1) Before operating the unit, thoroughly clean all water pipes so that they are free from foreign matters.
Separatelycleanthepipelinefromtheunit,soastoavoidanyforeignmatterbeingflushedtoheatexchanger;
(2) After the unit is fixed, pipeline of the water system can be installed. The water pipe must be kept
warm after installation to reduce heat loss;
(3) Drainage pipe interfaces should be provided at all low points of the water system to completely drain water
in the evaporatorand the system. All high points should be provided with exhaust valves to remove air from
thepipes.Exhaustvalvesanddrainagepipeinterfacesarenotinsulatedtofacilitatetroubleshooting;
(4) The inlet and outlet pipe connectors of the unit have been installed with fixed sheet metal.
When connecting water pipes, use pipe clamps to fix
the connectors on the unit and rotate to connect
water pipes. The connecters cannot directly
withstand the rotational torque;
(5) Set the shutoff valve on the water inlet and outlet
connectionpipeoftheunit;
(6 )Install a Y-type filter on the water inlet pipe of the
unit. Recommended size is above 18-mesh. Please
clean the filter after commissioning.
●
Customer shall inspect the water system on a regular
basis.
Water inlet/outlet plate Inlet and outlet pipe
Water pipe materials: PPR, stainless steel, etc. are recommended.
In order to reduce heat loss, the water pipes must be thermally insulated. The heat insulation structure
consists of anti-corrosion layer, insulation layer and protective layer (PPR pipe only needs insulation layer
and protective layer). To reduce corrosion, the pipeline and device metal surface can be coated with paint
(anti-corrosion coatings commonly used for hot water pipelines include heat-resistant anti-rust paints,
resin paints, etc.). The heat insulation layer and protective layer structure design should meet the
requirements for good insulation effect, convenient construction, fire prevention, durability, and beauty.
Common insulation materials include expanded perlite, rock wool, slag wool, and polyurethane. The heat
insulation and protective layer design should meet the following requirements:
(1) Fixed insulation structure shall be used for devices, straight pipes, pipe fittings, etc. without need for
troubleshooting; for flanges, valves, etc. with need for troubleshooting, removable insulation structured
shall be used;
(2) When the design thickness of heat insulation layer is over 100mm, the insulation structure should be
considered in double layers, and the gaps between inner and outer layers should be staggered with each
other;
(3) For vertical device, vertical pipeline with a height of over 3m and the pipelines with a horizontal angle
of above 45° and a length exceeding 3m shall be equipped with supporting rings with a spacing of
3~6m;
(4) The pipeline protective layer should feature protection and waterproof properties. It is recommended
that the pipeline shall apply metal protective layer such as galvanized steel sheet, rust-proof aluminum
sheet, etc.
The water in the water system must first be softened to prevent scaling in the heat exchanger
which may affect the heat exchange effect. In addition, the un-softened water may also scale in
the pipeline, resulting in increased water resistance and affecting the flow of water and the effect
of pump. Therefore, the softened water must meet the following requirements:
Ph value
Total hardness
7-8.5
<200pp
Conductivity
Sulfur ion Chloride ion Ammonium ion Sulfate ion Silicon iron content Sodium ion Calcium ion
0
<200pp
0
<200pp
<30pp
<0.3pp
N/A
<50pp
Water
pipe
Materials
Water quality
requirements