● Regarding the installation of backup pump, maintenance valve and temperature measure point, please
consider it yourself.
● All pipes and valves of the unit need the heat preservation.
● The reference diagram used non-pressure water tank, the system also can be pressurized system, use
the pressurized water tank.
5.2.3 Selection of the water pipes
● The pipe press and flow rate should be calculated before the diameter selection.
● The hydraulic calculation should be made after the selection of pipe diameter, if the resistance is more
than pump head, then need to choose a more power pump, or choose a bigger pipe.
6. Installation of optional accessories
6.1 Selection of the water pump
● The circulation pump is necessary for the system operation, the power port is prepared for the pump
inside the unit.
NOTE
Please check the Electric Diagram which located inside of the unit
● The head of circulation pump = height difference between water level and main unit + total pipelines
resistance (determined by the hydraulic calculation) + pressure loss of main unit (see the nameplate on
heat pump ).
NOTE
When multi paralleled, the water pump head is subject to the worst working condition loop.
6.2 Selection of the flow switch
● The selection of the flow switch is based on the actual system, the target flow switch is recommended.
Temperature of fluid: 0-120 °C , max working pressure 13.5 bar.
● The flow switch can be installed on the horizontal pipeline or the vertical pipeline which the fluid flow
direction is upward, but should not be installed on the vertical pipeline which the fluid flow direction is
downward.
● The flow switch must be installed on a straight pipeline, there must be more than five times the length of
the pipe diameter at its two sides. And, the direction of fluid must follow the arrow on the controller. The
terminal block should be in an easy operation position, (Figure 10)
● The pannier is absolutely forbid to touch the flow switch floor, or the switch will be deformed and invalid,
(Figure 11)
● Please be sure that the model of target sheet is determined by the system rated flow, diameter of outlet
To Next Page
