Primary
supply
return
District heating
Domestic hot
water
DHW
DCW
Secondary
HE
return
supply
10
Instructions for installation and use
TD & S substations
DKDHR
VI.GP.U2.02
Danfoss District Energy
9.
Installation instructions, GETTING STARTED
Connect the substation to the household piping in accordance
with the labelling at the bottom and/or in accordance with the
instructions in this manual.
If the system features DHW recirculation, a recirculation
connection must be established on the substation.
We recommend establishing recirculation BEFORE mounting
the substationt on the wall.
For instructions about recirculation connection, see page 13.
GETTING STARTED
Mount the substation on a solid wall using two sturdy bolts, screws,
expansion bolts or similar. In systems with pumps, we recommend
insertion of rubber spacers between the wall and the unit to pre-
vent resonance transferring into the wall.
1. Close all shut-off valves at the bottom of the substation before
connecting it/them to the household piping
2. Mount the district heating meter
(see page 11 in the instructions, if necessary)
3. NB!
Tighten
all
pipe connections, as they may have loosened
during transport and handling
4. On systems that feature a safety valve, establish a drain con-
nection in compliance with the applicable legislation
5. Open the ball valve for the HE supply and return flow and fill
the system with water by carefully opening the ball valve for
the district heating supply flow and at the same time venting
the system. Finally, open the ball valve for the district heating
return flow
6. Check the substation and the household piping thoroughly
for leaks
7. Pressure test the entire system for leaks in accordance with
the applicable regulations
8. Connect the pump (and any automatic components) to the electri-
city supply,
but do not
switch on the power (only on S substations)
9. Heat the system and vent the radiator circuit/heating side
thoroughly on the radiators and the air valve, if any
10. Now switch on the pump (and any automatic components)
at the mains (S substations)
11. Finish by adjusting the substation in accordance with the in-
structions and remember to fill-in the commissioning certifi-
cate on page 25.
12. NB!
Heating and cooling of the system may cause leaks. Therefore
it may be necessary to retighten the connections in the period
after commissioning.
!
!
