Central Heating HWC Single Coil Cylinder Installation Guide
- August 5, 2024
- Central Heating
Table of Contents
Single Coil Cylinder Installation Detail
Single coil cylinders come supplied with the element separately, the installer will need to use the key (shown) to remove the Boss/blanking plate, install the supplied element & reinstall the boss.
Please Note: The element should be installed in the downwards facing position as shown to ensure complete heating of the tank.
- Indirect Thermal Cut Out
- Indirect thermostat
- 2.7kW Element
- Enclosure Cover
- Brass Element Boss
- Element Thermostat
- Probe pocket
Single Coil Cylinder Thermostat Setting
1 to 5 = (10°C to 70°C ).
Its recommended that the electric element thermostat is set to between position 4 and 5 (60°C to 65°C )
Key Boss
Element Blanking Plate
Single Coil Cylinder Wiring Instruction
Heat Source with Probe
When installing a single coil cylinder on a heat source that has the ability to wire a DHW sensor into it such as our Air to water heat pumps or Baxi Boilers, the Cylinder should be wired as per below. As noted, the Indirect Thermal Cut Out and Indirect Thermostats are not required, these along with their capillaries can be removed and discarded.
Where the heat source cannot heat the HWC above 60°C as required for legionella prevention, we recommend the element is wired through a time clock.
Single Coil Cylinder: Heat Source with Probe
- 10K NTC Sensor Wired to Heat Source
- Power Supply (recommend Through Time Clock)
- Electric Element & Element Thermostat with High Limit Cut Out
- Dual Probe Pocket
- Not Required
Heat Source Without Probe
When installing a single coil cylinder on a heat source that does not have the ability to read a DHW sensor, a demand signal from the hot water cylinder will need to be wired through the Indirect Thermal Cut Out and Indirect Thermostat as shown on below Diagram. Typically, this Demand Signal to Turn the Heat source on (and open a Zone valve) would be wired through a time clock to schedule hot water production.
Where the heat source cannot heat the HWC above 60°C as required for legionella prevention, we recommend the element is wired through a time clock.
Single Coil Cylinder: Heat Source without Probe
- On/Off Signal from Time Clock
- Power Supply*
- Electric Element & Element Thermostat with High Limit Cut Out
- Dual Probe Pocket
- Not Required
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