What to do if the temperature limiter shuts down on my Vaillant auroFLOW plus Water Heater?
If the temperature limiter shuts down on your Vaillant Water Heater and the solar charger displays a fault message, it is recommended to contact your approved competent person for assistance.
What to do if I see a volume flow sensor cylinder circuit fault on my Vaillant Water Heater?
In case of electronics fault in volume flow sensor cylinder circuit of your Vaillant Water Heater, only a competent person can eliminate the cause of the faults and delete the fault memory.
What to do if there is an electronics fault in cylinder charge pump of my Vaillant auroFLOW plus Water Heater?
If there is an electronics fault in the cylinder charge pump of your Vaillant Water Heater, it is recommended that only a competent person eliminate the cause of the fault and then delete the fault memory.
What to do if there is an electronics fault in solar pump of my Vaillant Water Heater?
If there is an electronics fault in solar pump of your Vaillant Water Heater, it is recommended that only a competent person eliminate the cause of the fault and then delete the fault memory.
What to do if there is an electronics fault in solar pump 2 of my Vaillant Water Heater?
If there is an electronics fault in solar pump 2 of your Vaillant Water Heater, it is recommended that only a competent person eliminate the cause of the fault and then delete the fault memory.
What to do if the T5 collector sensor on my Vaillant auroFLOW plus Water Heater has a fault?
If the T5 collector sensor on your Vaillant Water Heater is showing a fault, only a competent person can resolve the issue and clear the fault memory.
What to do if the cylinder charge pump is blocked on my Vaillant Water Heater?
If the cylinder charge pump is blocked on your Vaillant Water Heater, it is recommended that only a competent person eliminate the cause of the fault and then delete the fault memory.
What to do if the solar pump is blocked on my Vaillant auroFLOW plus?
If the solar pump is blocked on your Vaillant Water Heater, it is recommended that only a competent person eliminate the cause of the fault and then delete the fault memory.
What to do if the solar pump 2 is blocked on my Vaillant auroFLOW plus Water Heater?
If the solar pump 2 is blocked on your Vaillant Water Heater, it is recommended that only a competent person eliminate the cause of the fault and then delete the fault memory.
What to do if the T6 cylinder temperature sensor on my Vaillant auroFLOW plus Water Heater has a fault?
If the T6 cylinder temperature sensor on your Vaillant Water Heater is showing a fault, only a competent person can resolve the issue and clear the fault memory.
Classification of warnings by danger level using symbols and signal words.
Guidelines for installation by competent persons and safe handling practices.
Warning about touching hot pipes carrying solar fluid or heating water.
Risks from modifying the product or its surrounding environment.
Potential building damage from leaks and required actions.
Defines the product's proper applications and prohibited uses.
Describes the unique operational characteristics of the auroFLOW plus system.
Details the operational sequence when the solar pump is idle and active.
Introduces the DIA system for displaying product status and troubleshooting.
Details the normal operating display and how to switch back to it.
How to read and understand fault codes displayed by the system.
Information on when fault messages appear and are recorded.
Importance of annual servicing by a competent person for operational reliability.
Procedure for permanently decommissioning the solar system.
Classification of warnings by danger level using symbols and signal words.
Guidelines for installation by competent persons and safe handling practices.
Warning about touching hot pipes carrying solar fluid or heating water.
Risks from modifying the product or its surrounding environment.
Potential building damage from leaks and required actions.
Defines the product's proper applications and prohibited uses.
Describes the unique operational characteristics of the auroFLOW plus system.
Details the operational sequence when the solar pump is idle and active.
Introduces the DIA system for displaying product status and troubleshooting.
Details the normal operating display and how to switch back to it.
How to read and understand fault codes displayed by the system.
Information on when fault messages appear and are recorded.
Importance of annual servicing by a competent person for operational reliability.
Procedure for permanently decommissioning the solar system.
The Vaillant auroFLOW plus is a solar system designed for solar heating support or hot water generation, primarily for use in solar systems with Vaillant solar collectors auroTHERM (VFK 135 VD and VFK 140 VD). This product functions as a heat generator in a hot water heating installation with a buffer cylinder, capable of covering basic and peak heat demands. It can be integrated with various heat generators like heat pumps, block heating and generating plants, and gas boilers. The system is designed to work with Vaillant ready-mixed solar fluid and operates without being completely filled or under pressure, eliminating the need for components like expansion vessels, pressure gauges, and air vents found in other solar systems.
The auroFLOW plus solar system operates on a unique principle where the solar circuit is not under pressure and not completely filled with solar fluid when the solar pump is idle. Instead, the solar fluid collects in a storage tank, and the collector field and solar lines are filled with air. All solar lines are installed with downward gradients to ensure the solar fluid flows back to the solar charger. When the solar control activates the solar pump, solar fluid is pumped from the storage tank through the solar return into the collector field. The fluid is heated in the collectors and then flows back to the solar charger via the solar flow pipe.
During the initial filling phase, the solar pump operates at maximum power, pushing solar fluid into the collector field and forcing air out. The heated solar fluid and air mixture then passes through the solar flow pipe to a heat exchanger in the solar charger, which transfers heat to the heating water in the buffer cylinder charging circuit. After a specified filling time, the solar control reduces the pump output. The system's enclosed air acts as an expansion vessel, accommodating the expansion of solar fluid and air as the system heats up. An expansion relief valve (7) protects the system from overpressure.
The integrated microprocessor-controlled solar control regulates the system based on a differential temperature control principle. It activates the solar pump when the temperature difference between the collector (T5) and cylinder (T6) temperature sensors is at least 15 K, provided the cylinder temperature is below the set maximum. The solar pump deactivates when the maximum cylinder temperature is reached, solar radiation is below 250 W, or a fault occurs. The solar control also features an annual calendar for automatic adjustment between summer and winter time.
The system can be expanded with an expansion module, which doubles the solar fluid volume with a parallel storage tank and increases pump output with two solar pumps connected in series. For larger applications, up to four solar chargers (basic and expansion modules) can be cascaded, supporting collector fields of up to 48 collectors.
The auroFLOW plus features a Digital Information and Analysis System (DIA system) with a display and five operating buttons.
General| Brand | Vaillant |
|---|---|
| Model | auroFLOW plus |
| Category | Water Heater |
| Language | English |
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