How to do if the GSHP water flow switch cannot be turned on

(the copy rights belongs to ZHOU ENSI LTD, if reproduce, must marked the original web address

GSHP means Ground Source Heat Pump, extracting heat from the ground by circulating fluid through buried pipes in horizontal trenches or vertical boreholes.  A well designed GSHP system provides the lowest running cost of any heating system – because it uses a small amount of electricity to transfer a large amount of naturally occurring heat from the ground into your building.

Recently, a user reported to us that in their project, the water flow switch of ground source heat pump could not be turn on, resulting in frequent start and stop of machine, and "pipe burst" of casing heat exchanger in the refrigeration or heating system. When our engineer arrived at the site and opened the ground source heat pump, they found that the target flow switch with low price and poor quality was used. The head of the water pump is only 5m H2O, so the pump head is basically all contributed to other parts, how to turn on the water flow switch?
sea water flow switch

PVC inline Flow Switches

GE-313AD Teflon Flow Switch with PVC Tee pipe, low cost, combats the p...

Water loop ground source heat pump is the most rapidly developing air-conditioning types at present. They are widely used in office buildings, shopping malls, high-grade houses and other occasions with the characteristics of flexibility and high efficiency and energy saving. In such widely used products, it is necessary to use a flow switch with guaranteed the quality, such as the differential pressure flow switch produced by A.YITE TECH, The system will not bring any resistance, and the HVAC water system with small diameter and small lift pump can provide more flexible pipeline layout for users.

Advantages of differential pressure flow switch:
1. It can be directly installed in the unit by the factory, and the components installed on site will not affect the accuracy of its flow control, and there is no requirement for the diameter of the main water pipe.
2. The action and reset of the differential pressure flow switch have a clear flow value, even if there is a small amount of air in the water system, it will not float, mainly because there are fewer moving parts, and there is no risk of fatigue damage to the moving parts. Due to the high stability of the differential pressure switch, there will be no misoperation
V10SS Paddle Flow Switch with Stainless Steel Body

V10SS Paddle Flow Switch SS304

The V10SS flow switch utilizes a rugged, hermetically sealed reed swit...

The controller does not need to delay the water flow signal as long as 10-30 seconds like the target flow switch, so as to avoid the freezing damage of the heat exchanger caused by the delayed compressor stop when the water flow is insufficient.
The differential pressure flow switch can accurately control the flow

3.When the water flow cannot reach the reset flow, it can not be started. It is convenient for the user to find out the problem of the external water system of the unit, and reduce the hidden trouble. When the system flow is lower than 50% of the rated flow (recommended value), cut off the main engine to prevent the freezing
4. The differential pressure type flow switch can not accurately control the flow change caused by scaling or fouling inside the heat exchanger. The higher limit set point can be used to precisely control the increase of the differential pressure of the heat exchanger caused by scaling or fouling and the actual flow is too small.



Contact: Mr.Robert

Phone: 0086-13166369204

Tel: 400-852-8332


Add: Building 17 &22, No.2928, Chuan Zhou Highway, Shanghai, 201319, China