Connecting The Furnace; Hydraulic Connections; Connecting The Gas Channel - DeDietrich Elitec DTG 1304 Eco.NOx/V Technical Instructions

1 Hydraulic connections

Installation must be carried out in accordance with the prevailing
regulations, the codes of practice and the recommendations in these
instructions.
1.1 Important recommendations for connecting the boiler to the heating circuit
There must be no total or partial closing mechanism
between the boiler and the safety valves (France: DTU -
65.11, § 4.22 - NF P 52-203).
Heating installations must be designed and implemented
to prevent heating circuit water and products contained in
it returning to the drinking water system (article 16-7
Departmental Health Regulations). A CB disconnector
(area disconnector
pressures)must be installed for filling the heating circuit
according to the NF P 43-011 standard.
Prior connecting the heating circuit hydraulic connections, it is vital
that the heating circuits are rinsed to prevent articles that may
damage certain parts from being introduced (safety valves, pumps,
non return valve...).
1.2 Hydraulic connection of the water circuit for domestic use
Please see the document delivered with the domestic hot water
preparer.

2 Connecting the gas channel

Each time, a blocking tap will be located as near as possible to the
heater.
Pipe diameters must be defined in accordance with ATG's
(Association Technique de Gaz) B171 specifications.
The load loss between the meter and heater must be lower than 1
mbar (heater operating).
Equipment pressure supply values :
- Natural gas H/E (G20) : 20 mbar
- Natural gas L/LL (G25) : 25 mbar
- Propane (G31) : 37 mbar
The boilers leave the factory operating with H/E natural gas. For
operating with natural gas L or propane, carry out the actions
described in the chapter "Adapting to another gas".
16

Connecting the furnace

for different uncontrollable
In the event where the burner is located at the highest point in the
installation, a dry running or water pressure control device my be
fitted.
Take care to ensure the hydraulic isolation of the primary and
secondary circuits using stop valves in order to facilitate maintenance
operations on the calorifier. These are used to carry out maintenance
on the tank and its systems without draining the entire installation.
These valves are also used to isolate the calorifier when conducting
a pressurised check on the leak tightness of the installation if the test
pressure for the calorifier is greater than the admissible operating
pressure.
IN ORDER TO FACILITATE BLEEDING, the installation must
be filled via the drainage/filling valve
DTG 1300 Eco.NOx/V 23/06/05 - 300002940-001B