23
Unit Installation Requirements
14
PKGP-SVX18B-EN
Unit Installation
Installation of Water System
Requirements for Pipeline Prefabrication
1. The diameter of the inlet and outlet water pipes for the water system shall not be smaller than that of the unit
joints (DN125);
2. The connections between the pipeline and the water pump and between the pipeline and the air conditioner must
be flexible pipes, which shall not be forcibly connected to reduce the vibration transmission;
3. The pipes shall be connected through welding flanges, and the secondary galvanization or antiseptic treatment
shall be performed on the welding seam and the surface of the heat affected area;
The blind flange shall be installed for the unit at the end, as shown below.
Blind flange
8-
Ф
18
Ф
210
20
Ф
245
Requirements for Pipe Installation
All water pipes shall be connected in accordance with the relevant regulations and comply with the local plumbing
regulations and rules. Refer to the schematic diagram for the installation of typical accessories for the water system.
Please strictly comply with the following installation requirements for the water system pipeline, otherwise it will
affect the normal operation of the unit, or even cause malfunction or damage to the unit.
1. Water flow rate of air conditioning unit: the water flow rate of the water system must be firstly designed in
a standard way by professional designers, so that the flow rate of water flowing through the water side heat
exchanger of the air conditioning unit is matched with the cooling capacity of the unit. Otherwise, the heat
exchange easily gets worse, affecting the air conditioning effect or even causing alarm and shutdown. When the
terminal fan coils are fully turned off or a single fan coil is turned on, the air conditioner is turned on for steady
operation for a period of time, and the temperature difference between the inlet water and the outlet water shall
be controlled to 4 and 6 degrees Celsius. If this requirement is not met, the water system resistance or pump head
shall be adjusted until the requirement is met.
2. Water volume: the water volume of the water system will affect the start/stop times of the compressor for the
air conditioning unit and cause the cold-state ventilation during the defrosting process of air-cooled fins in
the heating mode. It is required that the whole water system shall be provided with 10 liters/Kw water. If this
requirement cannot be met, an energy storage tank shall be installed in order to meet this requirement.
3. Pipe size: The water pipe size must be determined through the water system design to ensure the water flow of
the unit.
4. Terminal water flow rate: the water flow rate of the terminal product on the air side of the water system must be
firstly designed by professional designers in a standard way, so that the flow rate of water flowing through each
water coil on the air side is matched with the cooling capacity of the terminal product on the air side.
5. Inlet and outlet pipes: the pipes must be supported independently and shall not be supported on the unit. In order
to avoid damage to the unit, the system water pipes shall not be installed in reverse. The inlet pipe of the unit
1. Requirements for pipeline prefabrication:
• The diameter of the inlet and outlet water pipes for the water system shall not be smaller than that of the unit joints (DN125);
• The connections between the pipeline and the water pump and between the pipeline and the air conditioner must be flexible pipes, which
shall not be forcibly connected to reduce the vibration transmission;
• The pipes shall be connected through welding flanges, and the secondary galvanization or antiseptic treatment shall be performed on the
welding seam and the surface of the heat affected area;
The blind flange shall be installed for the unit at the end, as shown below.
Blind flange
2.Requirements for pipe installation
All water pipes shall be connected in accordance with the relevant regulations and comply with the local plumbing regulations and rules.
Refer to the schematic diagram for the installation of typical accessories for the water system. Please strictly comply with the following
installation requirements for the water system pipeline, otherwise it will affect the normal operation of the unit, or even cause malfunction or
damage to the unit.
• Water flow rate of air conditioning unit: the water flow rate of the water system must be firstly designed in a standard way by profession
al designers, so that the flow rate of water flowing through the water side heat exchanger of the air conditioning unit is matched with the
cooling capacity of the unit. Otherwise, the heat exchange easily gets worse, affecting the air conditioning effect or even causing alarm
and shutdown. When the terminal fan coils are fully turned off or a single fan coil is turned on, the air conditioner is turned on for steady
operation for a period of time, and the temperature difference between the inlet water and the outlet water shall be controlled to 4 and 6
degrees Celsius. If this requirement is not met, the water system resistance or pump head shall be adjusted until the requirement is met.
• Water volume: the water volume of the water system will affect the start/stop times of the compressor for the air conditioning unit and
cause the cold-state ventilation during the defrosting process of air-cooled fins in the heating mode. It is required that the whole water
system shall be provided with 10 liters/Kw water. If this requirement cannot be met, an energy storage tank shall be installed in order to
meet this requirement.
• Pipe size: The water pipe size must be determined through the water system design to ensure the water flow of the unit.
• Terminal water flow rate: the water flow rate of the terminal product on the air side of the water system must be firstly designed by
professional designers in a standard way, so that the flow rate of water flowing through each water coil on the air side is matched with the
cooling capacity of the terminal product on the air side.
• Inlet and outlet pipes: the pipes must be supported independently and shall not be supported on the unit. In order to avoid damage to the
unit, the system water pipes shall not be installed in reverse. The inlet pipe of the unit must be connected to the water inlet joint marked
with “water inlet”; the outlet pipe must be connected to the water outlet joint marked with “water outlet”.
• Anti-vibration hose: the inlet and outlet pipes of the unit must be connected with anti-vibration hoses to avoid long-distance noise transfer.
If there is an external water pump, the anti-vibration hoses must be installed at the inlet and outlet pipes of the pump, and the outlet water
of the pump shall flow to the air conditioning unit.
• Water pressure gauge: the pressure gauge and the cut-off valve shall be installed at the inlet of the inlet pipe and the outlet of the outlet
pipe for the air conditioning unit. If there is an external pump, the pressure gauge and the cut-off valve shall be installed at the water
inlet of the pump in order to understand the water system resistance and pump head consumption of the unit, facilitate the monitoring
and adjustment of water flow and cut off the water flow during maintenance.
4-3. Installation of Water System