6.4. Hot water storage
For the best results, the use of a heat storage tank is recommended. A properly sized
storage tank can cut wood consumption by as much as 40%. Hot water storage allows the
boiler to run at optimum capacity regardless of the demand for heat from the building being
heated. The stored heat can be recovered later, both stretching the time between boiler
refuelings, and as an additional source of heat on very cold days. Generally speaking, the
bigger the storage tank the better, as the boiler is most efficient when running at full
capacity. The rule of thumb on tank sizing is that 50 litres of water can store about 1 KW of
boiler heat. A hot water storage tank connected to an EKO boiler can also be used to store
hot water from a solar hot water heater.
.
System set up with a heat storage tank and coil, domestic hot water heat option
and solar panel.
1. EKO boiler with RK 2001
controller
2. Laddomat 21 thermoregulator
3. Hot water storage tank
4. Electric water heater
5. Three-way mixing valve
6. Circulating pump
7. Room temperature sensor or
programmable room thermostat
8. Supply to heated space
9. Expansion tank
10. Domestic hot water mixing
valve
11. Heat exchanger coil
12. Solar panel
13. Pump
6.5. Starting and operating the boiler for the first time
Before firing up the boiler for the first time, the installation should be inspected and approved
by a qualified individual (plumbing & heating contractor, electrician, etc.) The system should
be full of water and vented and all other settings checked and tested, especially the pressure
relief valve.
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