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Instructions for installation and use
TD & S substations
DKDHR
VI.GP.U2.02
Danfoss District Energy
7.
Enduser instructions, Initial adjustment/setting
Domestic hot water control
Danfoss PM2+P controller (Fig. 1) for domestic hot water. Set the DHW
temperature by turning the adjuster lever towards red (hotter) or blue
(colder). Start by turning the lever
clockwise
– until the pin is opposite
the blue dot. Then turn the lever
counter-clockwise
until the tempera-
ture of the tap water is approx. 48°C during normal tapping flow (7–8
litres per min.). The temperature must never exceed 55°C to prevent
limescale deposits building up in the water heater.
Danfoss PTC2+P controller (Fig. 2) for domestic hot water. Set the DHW
temperature by moving the adjuster lever towards “+” (hotter) or “-”
(colder).
Start by turning the lever
clockwise
– until it stops/until you cannot
turn it any further. Then turn the lever
counter-clockwise
until the
temperature of the tap water is approx. 48°C during normal tapping
flow (7–8 litres per min.). The temperature must never exceed 55°C to
prevent limescale deposits building up in the water heater.
Bypass or circulation thermostat
Thermostat (Fig. 3) that keeps the branch pipe warm in the summer
or regulates the circulation temperature if domestic hot water recir-
culation has been established in the hot water system.
The thermostat should initially be set to position 3.
Heating ciruit, Differential Pressure Controller
The differential pressure controller (Fig. 4) reduces the high, fluctuat-
ing pressure in the district heating network to a constant operating
pressure over the unit. The differential pressure controller is initially
set by the plumber in connection with the commissioning of the
substation. If disruptions to the operation occur: noise in the radiator
thermostats or poor regulation capacity, it may be necessary to reset
the differential pressure controller to a lower operating pressure. We
suggest that you contact your local plumber for assistance.
Regulation of the supply temperature to the heating circuit
TD substations:
The temperature cannot be regulated.
S substations:
The supply temperature to the substation can be set by
adjusting the thermostat T°C (Fig. 5). The thermostat will be set by the
plumber in connection with the commissioning, but it may be neces-
sary to adjust it subsequently depending on the outdoor temperature.
Indicative scale setting: (the scale is on top of the lever)
Pos. 4 ≈ 50°C
5 ≈ 60°C
6 ≈ 70°C
The setting values may vary depending on the operating conditions.
It is important to set the supply temperature to the radiators as low as
possible. Use the radiator thermostats to regulate the room temperature.
NB! For houses that are heated exclusively with floor heating.
The supply temperature should typically be set to approx. 30–35°C,
which corresponds to pos. 2–2.5 on the thermostat (guiding value).
The supply temperature must never exceed 40°C. (In addition, ALWAYS
refer to the instructions from the floor supplier)
Alternatively, S substations can be controlled by an
electronic control-
ler
, Danfoss ECL (fig. 6). See the enclosed documentation for same.
Pump
(only on S substations)
S substations are factory fitted with a pump (fig. 7). The pump setting is
established in connection with the commissioning. Generally speaking,
this setting is not to be altered. If it should nevertheless be necessary to
change the pump setting, see the section concerning pumps in the in-
stallation and commissioning sections regarding the individual products.
In the summer, you can switch off the power to the pump at the mains
if you want to save electricity by not heating your home.
Start-up and venting – see the installation and commissioning sections,
if necessary.
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 7
or
or
Fig. 6
