6 - Installation and Commissioning
Installation must meet valid rules and may be done by qualified staff only. The tank shall be placed on the
floor, as close to the heat source as possible.
Warning: Defects caused by improper installation, use or handling are not covered by warranty.
6.1 - Connection to heat sources
Connect the heating circuits to the inlets to and outlets from heating coils. The heat source for the tank - 2
enameled coils - connect using G 1” (R2DC 160 - G3/4”) nipples.
6.2 - Connection to a solar system
The tank can be used with a solar system. In such a case, the inlet for hot heat-carrying liquid coming from the
solar system shall be connected to the G 1” (R2DC 160 - G3/4”) upper sleeve of the heating coil and the lower
outlet to the return piping to the solar system. Insulate all the piping between the tank and the solar system.
6.3 - Heating rod installation
The G 6/4“ side sleeve is designed to accommodate an electric heating rod. Heating rods of output up to
6 kW can be used (depending on the tank diameter and rod length), connected either directly to the mains
(thermostat-equipped rods), or to a heating system controller. The installation may be done by qualified staff
only.
Warning: Electric heating elements shall be protected by a safety thermostat.
6.4 - Connection to water mains
DHW piping shall be done according to valid rules. G 3/4” threaded couplers are used to connect the tank to a
cold water inlet and hot water outlet. A 6bar safety valve shall be installed at the cold water inlet, installation of
a reducing valve is recommended. If the pressure from water mains exceeds 6 bar, a reducing valve is neces-
sary. In order to prevent water loss, an expansion tank should be installed at the cold water inlet as well (8l
volume for R2DC 160, R2DC 200 and R2DC 250, 12l volume for R2DC 300).
Should the water be too hard, install a water softener before the tank. In case the water contains mechanical
impurities, install a strainer.
A suitable thermostatic mixing valve should be installed at the hot-water outlet from the tank, preventing too
hot water from entering the taps.
Install a drain valve to the lowest point of the tank.
Complete DHW piping shall be properly insulated.
6.5 - Electronic anode rod installation
A so called electronic anode rod can be used instead of the magnesium one for R2DC 300 tank. Its principle
advantage is that it doesn’t need to be taken out for function check. In this case, just visual check of the elec-
tronic anode indication lamp is sufficient. R2DC 160, R2DC 200 and R2DC 250 tanks are not designed for use
of an electronic anode rod.
The electronic anode kit mounts in place of the magnesium one. In order to install the electronic anode rod, a
space is needed between the tank top and ceiling that corresponds to the anode rod length shown in the table
below. In order to protect the tank properly and meet its warranty conditions, the anode from the table below
shall be used.
Kit for R2DC 300 storage water heater.
Should an electronic anode rod or ran electric heating rod be installed, an interconnection shall be done, i.e.
the metal mantle of the storage tank shall be wired to the protective neutral.
6.6 - Commissioning
Fill the heating circuits with the appropriate fluids and air-bleed the entire system.
Fill the tank with cold water following this sequence:
- open the shut-off valve at the tank inlet
- open the hot water tap/outlet point, as soon as hot water starts flowing, filling is complete; close the tap
- check all connections for leaks and the system pressure
Code Anode rod length [mm] For tanks
9174 500 (350/150) R2DC 300
