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8

FRG3015-F-RV-IM-DE-W-UK-02-2022-Rev.0.1 | Part no. 10019421

EN

ENGLISH

9  Troubleshooting

Fault

Possible cause

Remedy

1

Underfloor heating circuits do not heat up; pump not running

1.1

Temperature limiter (TL) is switching the control station 

pump off. 
Reason: TL setting is too low.

Set TL to approx. 10 K higher than the underfloor heating 

flow temperature.
Note the maximum permitted temperature for the under-

floor heating! 
The switching difference of the TL is approx. 5 K.
The control station is ready to operate more quickly if 

the TL is removed briefly to cool down to its switching 

temperature.

1.2

TL is switching the control station pump off. 
Reason: The pump remains switched on despite closed 

underfloor heating circuits. The water inside the control sta-

tion is being heated by waste heat from the pump. The TL 

switches the pump off when the maximum temperature is 

reached!

Remove TL from the control station and fit to supply heat-

ing circuit manifold. 
Use electrical control distributor with pump logic (relay). The 

pump logic ensures that the pump runs only if at least one 

underfloor heating circuit is open.

1.3

The pump is connected to a room thermostat or electrical 

control distributor. 
If all actuators are closed, the pump switches off. During a 

lengthy shutdown, the underfloor heating flow cools down. 

The controller therefore causes the 3-way mixer valve to 

open. Hot water is injected from the primary heating circuit. 

As a result, the control station heats up. When the maxi-

mum temperature of the TL is reached, the contact opens. 

The pump does not switch on again.

Remove TL from the control station and fit to supply heat-

ing circuit manifold. 

See 1.1

2

Underfloor heating flow temperature cannot be set to the required value or the feed temperature fluctuates 

significantly

2.1

Supply and return on the control station have been mixed 

up

Check that all connections on the control station are cor-

rect (see Section „Components overview“ on page 4)

2.2

The head / pumping level of the pump is set too low

Change the pump setting (see separate pump instruction 

manual).

2.3

The differential pressure of the primary pump is too high 

(>500mbar)

Change the pump setting (see separate pump instruction 

manual) or fit differential pressure controller.

2.4

The heating load is too high for the control station, i.e. heat 

consumption exceeds the nominal output of the control sta-

tion. This condition can come about temporarily, for exam-

ple, when heating up a "cold" floor.

Establish maximum heat requirement and compare with 

nominal output. The heating circuits may have to be shared 

with a second control station with a corresponding heating 

circuit distributor. 
If this is caused by heating up the underfloor heating for the 

first time, it may start working normally after the heating up 

phase (2 – 3 days). This is particularly likely in the case of 

operation at the upper nominal output limit. 

2.5

The thermostat head is defective.

Replace the thermostat head.

Содержание FRG3015-F RV

Страница 1: ...FRG3015 F RV Control station for constant maintenance of the flow temperature in surface heating systems Installation and Operating Manual translated from the original operating manual WattsWater eu ...

Страница 2: ...mity A Declaration of Conformity according to Machinery Directive 2006 42 EC has been issued for the FRG3015 F RV product 1 3 Product features All connections to the system have 1 male thread and flat sealing Very convenient controls compact space saving design Contents 1 General information 2 1 1 Important information about this manual 2 1 2 Product conformity 2 1 3 Product features 2 2 Safety 3 ...

Страница 3: ...e operated by people including children with limited physical sensory or mental capacities or by people with insufficient experience or previ ous knowledge 2 4 Foreseeable misuse The following is considered to be foreseeable misuse Operating the FRG3015 F RV beyond its specifications Improper use of the FRG3015 F RV Modifications to the FRG3015 F RV that have not been agreed with the manufacturer ...

Страница 4: ... be checked on the thermometer 7 Check valve 4 prevents a short circuit of the primary cir cuit The temperature limiter 1 switches off the circulating pump 3 when the supply temperature is exceeded thus preventing the panel heating system from overheating 5 Technical data Hydraulic performance data Max operating pressure 6 bar Max ambient temperature1 40 C Max operating temperature1 80 C Setting r...

Страница 5: ... 6 Overall dimensions 127 5 210 G1 DIN228 G1 DIN228 319 25 188 39 5 26 5 94 1 Fl DIN228 1 Fl DIN228 Fig 6 1 Overall dimension 7 Pressure loss diagram 1 100 100 1 000 1 000 10 000 10 10 Fig 7 1 Pressure loss diagram Flow rate l h Pressure loss mbar Injection Manifold side ...

Страница 6: ...on can be fitted on the right or left of the manifold by turning the eccentric screw fitting 5 Fig 8 1 also upside down 2 Fit the temperature limiter to the supply collector pipe on the manifold 3 Connect the control station to the power supply Further information about electrical connection of the control station can be found in the separate documen tation for the assemblies 4 Set the temperature...

Страница 7: ...ally used for sur face heating systems The system temperature is often significantly lower than the maximum value that can be set on the thermostat head To avoid damage to the floor structure from excess temperature the flow temperature set value can be limited and locked in on the thermostat head 1 Set the temperature and with the surface heating run ning check it on the thermometer 2 If it is co...

Страница 8: ...en Hot water is injected from the primary heating circuit As a result the control station heats up When the maxi mum temperature of the TL is reached the contact opens The pump does not switch on again Remove TL from the control station and fit to supply heat ing circuit manifold See 1 1 2 Underfloor heating flow temperature cannot be set to the required value or the feed temperature fluctuates si...

Страница 9: ...or replace seals as required 2 Functional check Check that settings and operating and performance parameters are set correctly Check flow noise during operation Ask users if there are any noticeable problems 3 Action to be taken following maintenance work Check that all screw fittings that were unscrewed have been retightened and retighten if necessary Remove all tools materials and other equipmen...

Страница 10: ...RG3015 F RV properly or commission a specialist company to do so 3 Sort the assemblies and component parts into recyclable materials hazardous substances and operating materials 4 Dispose of the assemblies and components in accord ance with local laws and regulations or take them to be recycled 11 1Return to the manufacturer Get in contact with the manufacturer if you would like to return the FRG3...

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