Product Description Of Temperature Zone; Pumped Liquids; Identification - Grundfos iGRID Montage- Und Betriebsanleitung

2.2 Product description of Temperature Zone

Grundfos iGRID Temperature Zone is a prefabricated mixing loop
with pumps for incorporation in a new or existing district heating
network. The solution enables controlled recirculation from the
return pipe to the supply pipe in order to reduce and adapt the
supply temperature to the exact needs.
The solution is constructed from PE (polyethylene) and is
delivered with the following pre-assembled components as
standard:
• inlet and outlet pipes
• isolating valves
• non-return valves
• pump or pumps including control unit
• temperature sensor
• mixing point
• connection points for sensors.
The inlet and outlet pipes for district heating connections are made
of steel lined with PU foam insulation and an outer sheath of PE
material welded to the pit wall at the pipe passage.
The pipe connections to the pump or pumps inside the pumping
station are assembled with flanges, bolts and gaskets inside
the solution.
The exterior pipe connections are welded to the buried district
heating pipes in the district heating network.
The solution has one or more pumps of the CRE or TPE type for
pressure boosting.
The solution provides the possibility of incorporating a flow sensor
including a number of pressure and temperature sensors as
needed.
The solution is fitted with non-return and drain valves to empty the
pipes of district heating water in the pit during service and
maintenance.
The solution is delivered with either a heavy-load top cover or a
standard top cover according to the requirements of the customer
depending on the intended location of the pit.
2.2.1 Application of Temperature Zone
The Grundfos iGRID Temperature Zone prefabricated mixing loop
solution is as standard used for controlled recirculation from the
return pipe to the supply pipe in the district heating network.

2.3 Pumped liquids

2.3.1 Viscosity
The viscosity of the pumped liquid must not exceed the permissible
viscosity level of the pump or pumps. See the installation and
operating instructions of the pump for more information.
2.3.2 Liquid temperature
Maximum temperature: 110 °C for the pumped liquid. For higher
temperatures, contact Grundfos.
2.3.3 Pressure
Maximum pressure: 14 bar for the pumped liquid. For higher
pressure, contact Grundfos.
6

2.4 Identification

2.4.1 Nameplate
1
P code:
2
Model-PN-SN
3
Type
4 I&O PN
5
Made in
6
Max Temp. C Max Press.
7
Rated voltage V Rated frequency
8 Rated current A Rated power
9
Nameplate for iGRID Pressure and Temperature Zone
Pos. Description
1 Product name
2 Model, material and serial number
3 Product type
4 Publication number
5 Country of production
6 Max. operating temperature [°C]
7 Rated voltage [V]
8 Rated current [A]
9 Approval marks
10 Production code
11 Weight [kg]
12 Max. operating pressure [bar]
13 Rated frequency [Hz]
14 Rated power [kVA]
10
11
Weight
12
Bar
13
Hz
14
kVA
DK - 8850 Bjerringbro Denmark