Hot Water Maintenance Trace Heating

ETH-W Hot Water Maintenance Heat Trace Cable

The ETH-W55 and W56 range of parallel circuit self-regulating heating cables are the perfect solution for hot water temperature maintenance of pipes installed in offices, hotels, sports centres, domestic dwellings etc.The ETH-W range of heaters provide instant hot water from every tap or shower unit when installed on a non-circulating system.

These heaters regulate their power output to compensate for the variation in water and ambient air temperatures. The ETH-W range eliminates the need for designing complex re- circulating systems with pumps, valves and return pipes, thereby providing low installation costs.

The temperature in the pipes is maintained by varying the thickness of the thermal insulation in line with the pipe diameters. Insulation thickness’s are based on those commercially available in order to maintain the minimum temperatures stated in an ambient of 18°C.

For exact temperature control a a temperature control device may be required.

Specifications

Hot Water Maintenance Heat Trace Cable | Indelex Heating
ETH-W55
Maximum Exposure Temperature:85°C (continuous power on)
Water Maintenance Temperature:55°C
Minimum Installation Temperature:-40°C
Supply Voltage:230v
Maximum Circuit Length:100m (20Amps MCB type C)
Dimensions:6mm x 12.5mm
Nominal Power Output:9 W/m @ 55°C
ETH-W65
Maximum Exposure Temperature:90°C (continuous power on)
Water Maintenance Temperature:65°C
Minimum Installation Temperature:-40°C
Supply Voltage:230v
Maximum Circuit Length:100m (20Amps MCB type C)
Dimensions:6mm x 12.5mm
Nominal Power Output:12 W/m @ 65°C

Recommended insulation schedule based on thermal conductivity of 0.035 at 30°C

ETH-W55ETH-W65
Pipework Location:InternalInternal
Mean Ambient Temperature:18°C18°C
Maintain Temperature Nominal:55°C65°C
Pipe Diameter
15mm22mm28mm35mm42mm54mm67mm
Mineral Wool Insulation Thickness:ETH-W5520mm20mm25mm30mm40mm50mm50mm
ETH-W6525mm25mm30mm40mm50mm50mm65mm

Maximum heating cable circuit lengths for 55°C start-up temperature

ETH-W55ETH-W65
AmpsVoltageMaximum Circuit LengthMaximum Circuit Length
Electrical Protection Sizing MCB Type C:16A230v80mm80mm
20A230v100mm100mm

The use of a 30mA residual current device to provide maximum safety is recommended

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