WIFI App control ceiling ducting positive pressure home heat recovery ventilation system,
CO2 control, crossflow heat exchanger, HEPA Filter, Humidity, primary filter, WIFI,
Liquid Circulation Heat Exchanger -Heat recovery core of AHU
Working Principle
Liquid circulation heat exchanger is liquid to air heat exchanger, heat exchangers usually installed in both fresh air (OA) side and exhaust air (EA) side, the pump between the two heat exchangers make the liquid circulate, then the heat in the liquid pre-heat or pre-cool the fresh air. Normally the liquid is water, but In winter, in order to decrease the freezing point, moderate ethylene glycol will be added into the water in reasonable percentage.
Features of Holtop Liquid Circulation Heat Exchanger
(1) Fresh air and exhaust air heat exchanged by separated liquid pipes, zero cross contamination. It suitable for heat recovery energy saving of air handling system of hospital, germfree lab and industries which discharge poisonous and harmful gas.
(2) Stable,reliable and long service life
(3) Flexible connection between fresh air and exhaust air exchangers, easy installation, which also is convenient for old AHU improvement.
(4) Heat exchangers are conventional, easy and low maintenance costs.
(5) Wide range of application, various connection methods like one to one, one to more, or many to many.
Specifications
(1) Liquid circulation heat exchangers is sensible heat exchangers, efficiency is between 55% to 60%.
(2) Suggested rows number in 6 or 8, face velocity not over 2.8 m/s
(3) The choice of circulating pump can refer to the fresh air and exhaust air pressure drop and the water flows pressure drop.
(4) Air flow direction has significant effect on the heat recovery efficiency, influence rate up to 20%.
(5) Freezing point of the hybrid ethylene glycol and water should be 4-6 ℃ lower than the local minimum outdoor temperature of winter, percentage of hybrid can be referred to the following table.
| Freezing point | -1.4 | - 1.3 | -5.4 | -7.8 | -10.7 | -14.1 | -17.9 | -22.3 |
| Weight percentage (%) | 5 | 10 | 15 | 20 | 25 | 30 | 35 | 40 |
| Volume percentage (%) | 4.4 | 8.9 | 13.6 | 18.1 | 22.9 | 27.7 | 32.6 | 37.5 |
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New Eco-Smart HEPA Energy Recovery Ventilator is ERP 2018 compliant.
It is built in energy saving BLDC motor, F9 filter, high efficiency enthalpy heat exchanger. Ideal ventilation solution for residential and light commercial project.
Energy Feature:
1)Energy saving BLDC motor, 10 speeds control
2)High eficiency enthalpy heat recovery, more comfortable indoor climate
3) G3+F9 filter, eficiency over 96% to filter the particulate from 2.5µm to 10µm
4) Intelligent control system, optional CO 2 and humidity control function, external control and BMS control available
5)Double filter alarm, timer alarm or diferent pressure gauge alarm available
6) Auto bypass, intelligent controlled by outdoor temperature.
efficiency class of A according to regulation EU.No.1254/2014.
Basic funtion of Holtop intelligent controller
1) Individual supply and exhaust fan speeds and ESP control (AC 3 speeds DC 10 speeds)
2) outdoor temperature, indoor temperature, supply air temperature and exhaust air temperature display
3) weekly timmer function
4) Auto bypass and auto defrost funciton
5) Intergated RS485 connector for BMS control(on PCB)
6) External on/off control and fire alarm control, inter lock function (on PCB)
7) Faulty signal output for monitoring function (on PCB)
8) Night free cooling function (on PCB)
9) Optional CO2 sensor and humidity sensor to control CO2 concentration and indoor humidity
10)Optional electical heater for supply air or outdoor air (alternative for comfort ventialtion or extremly winter low temperture defrost)
11)Optional central control by one multi controller (up to 16pcs ERV controlled by one controller)
Latest update for Holtop intelligent controllers: WIFI connection function.
App is available to ISO and Android phones with the following functions:
1. Monitoring indoor air quality
Monitor local weather, temperature, humidity, CO2 concentration, VOC at your hand for healthy living.
2.Variable setting
Timely switch, speed settings, bypass/timer/filter alarm/temperature setting.
3.Optional language
Different language English/French/Italian/Spanish and so on to meet your requirement.
4.Group control
One APP can control multiple units.
