Commissionning; Refilling The Installation; Final Checks Before Commissioning - DeDietrich Elitec DTG 1304 Eco.NOx/V Technical Instructions

1 Refilling the installation

Firstly, fill the tank with domestic hot water.
Domestic hot water circuit
- Fill the calorifier via the cold water input pipe. If necessary, rinse
the domestic circuit (particularly when commissioning), allowing
the water to flow for a certain amount of time.
- Bleed the domestic circuit (tank and distribution network); to do
this:
- Completely fill the calorifier with water, leaving the hot water valve
open; close this valve only when the flow is regular and there is no
noise in the pipes.
- Then successively degas all the hot water pipes by opening the
corresponding valves in order to prevent the noise caused by air
movement when drawing off water.
- Check the safety devices (particularly the valve or safety unit),
referring to the instructions provided with these components.
When reheating domestic hot water, a certain amount of water
may escape via the valve or the safety unit because of the
expansion of the water in the calorifier. There is no cause for
concern at this absolutely normal phenomenon, which must in
no event be hindered.
The heating circuit (boiler and tank exchanger) must be filled using
the drainage tap to the rear of the tank. When filling the heating
circuit, correctly bleed the exchanger on the domestic water calorifier
as follows::
Unscrew the cap on the automatic bleed valve by a few turns
Ensure that the non-return angle valve is in the automatic
position
Ensure that the drainage tap is in the open position
Fill the low flow heating circuit using the drainage tap in order to
favor the bleed
After filling the installation, close the drainage tap

2 Final checks before commissioning

Check the following points before starting the heater :
- Check that the equipment is properly set for the type of gas used.
The boilers leave the factory operating with H/E natural gas.
- Check the gas pressure upstream from the boiler.
- Check the seals on the gas and water connections.
20
Heating circuit

Commissionning

Unstick the load pump in necessary: to do this, unscrew the
protection cap in front of the pump and insert a screwdriver into the
slit (V) on the pump center line. Turn several times to the right and
left.
- Cold run the pump for a few minutes to enable priming.
- The heating circuit must be bled from the highest point of the
installation using a suitable bleeding device (not provided).
DTG 1300 Eco.NOx/V
Automatic
bleed valve
Dhw pump
V
Automatic
position
23/06/05 - 300002940-001B