RT414 Two Pipe Thermostatic Radiator Valves With Automatic Balancing
Product Information:
The Drayton auto-balancing TRVs are two-pipe thermostatic
radiator valves that are approved to the European Standard EN215
and manufactured in factories assessed and certified to BS EN ISO
9001. These TRVs maintain a constant flow rate in the radiator
regardless of changes in system pressure or other TRVs in the
system opening and closing. They help to avoid cold spots in the
home and contribute to improved boiler efficiency.
Description of Operation:
The auto-balancing valves contain a cartridge which maintains
flow rate through the radiator at all times. Note that the valve
must simply be set according to the output of the radiator to
ensure that each radiator receives the correct flow of water at all
times.
Installation:
When filling and commissioning the system, ensure that valve
insert is in commissioning position (the valve is delivered in the
commissioning position). Observe the flow direction indicated on
the side of the valve. Use the balancing key 07 35 162 or a 11mm
spanner to adjust the hex at the top of the valve insert and align
setting value with index mark according to the table in this
document. The lockshield should be fully open and only used only to
isolate the radiator. When using jointing compound, care must be
taken to avoid any excess being transferred to the valve seat, as
this could cause malfunction of the valve. DO NOT FIT CAPILLARY
FITTINGS near to these valves as excessive heat from a blowtorch
may damage the internal valve components. The maximum temperature
of the thermostatic head is 50oC.
Product Usage Instructions:
- Visit https://www.draytoncontrols.co.uk/calculator and use the
setting position calculator to determine the output of your
radiator. - Observe the flow direction indicated on the side of the valve
and ensure that the valve insert is in commissioning position. - Use the balancing key 07 35 162 or a 11mm spanner to adjust the
hex at the top of the valve insert and align setting value with
index mark according to the table in the user manual. - The lockshield should be fully open and only used only to
isolate the radiator. - When using jointing compound, care must be taken to avoid any
excess being transferred to the valve seat, as this could cause
malfunction of the valve. - DO NOT FIT CAPILLARY FITTINGS near to these valves as excessive
heat from a blowtorch may damage the internal valve
components. - The maximum temperature of the thermostatic head is 50oC.
If the output of the radiator is not known please use the setting position calculator on the Drayton website, here:
https://www.draytoncontrols.co.uk/calculator
You’ll also find further help and advice on radiator balancing.
Schneider Electrical Controls Ltd 401 Southway Drive Plymouth PL6 6QT United Kingdom
Technical Helpline Tel: 0333 6000 622 [email protected] Website: www.draytoncontrols.co.uk
06490344001 Iss A
Two-pipe Thermostatic Radiator Valves with automatic balancing Installation and operating instructions
Approved to EN215: Quality Standards:
All Drayton Thermostatic Radiator Valves are approved to the European Standard EN215. All Drayton Thermostatic Radiator Valves are manufactured in factories assessed and certified to BS EN ISO 9001.
General description Drayton’s auto-balancing TRVs maintain a constant flow rate in the radiator regardless of changes in system pressure or other TRVs in the system opening and closing. As such they help to avoid cold spots in the home and contribute to improved boiler efficiency.
Description of operation The auto-balancing valves contain a cartridge which maintains flow rate through the radiator at all times. Note that the valve must simply be set according to the output of the radiator to ensure that each radiator receives the correct flow of water at all times.
Installation IMPORTANT: observe the flow direction indicated on the side of the valve. When filling and commissioning the system ensure that valve insert is in commissioning position (the valve is delivered in the commissioning position).
Use the balancing key 07 35 162 or a 11mm spanner to adjust the hex at the top of the valve insert and align setting value with index mark according to the table in this document. This will ensure that the radiators always receive the correct flow regardless of system pressure and other valves opening and closing.
The lockshield should be fully open and only used only to isolate the radiator.
Mounting
When using jointing compound, care must be taken to avoid any excess being transferred to the valve seat, as this could cause malfunction of the valve. DO NOT FIT CAPILLARY FITTINGS near to these valves as excessive heat from a blowtorch may damage the internal valve components. The maximum temperature of the thermostatic head is 50oC.
Integral TRVs
General considerations on balancing
·Unnecessarily higher return water temperatures reduce the operational efficiency of the heat source. ·Unbalanced systems can result in radiators not heating up properly, causing hot and cold spots to emerge within a property. ·Unbalanced, ineffective heating system leads to consumer dissatisfaction. ·Manual balancing is accurate only for a single set of conditions; when TRVs start to close the flow rate will increase on the other radiators. ·Settings can be lost when decorating or replacing radiators. ·Balancing with a Lockshield valve is less than precise due to unsuitable valve authority.
Solutions:
·Installing a modulating pump and setting to the lowest setting that will achieve the correct T drop across index circuit. ·Installing Automatic Balancing TRVs to always deliver the required flow rate and achieve the correct T across all radiators. Any radiator acting as a bypass and is always ON should also have an auto-balancing valve fitted. When draining/refilling or cleaning the system always leave the valves in their commissioning position (as supplied) before setting according to the
individual radiator output.
Index
Commissioning position
Drayton Controls | Heating controls, TRVs and thermostats
