Device
WPG-18-1 HT
WPG-21-1 HT
Secondary side
1)
(heat sink) - water
3)
Min. / Max. pressure in the system
MPa
0,05 / 0,3 (0,5 / 3 bar)
Pipe connections
G 5/4” (int. dev.)
G 5/4” (int. dev.)
Recommended dimensions of pipes leading to the
device
DN
32
32
Recommended main circulation pump
8)
WILO
Stratos 25/1-8
Heating
Operating envelope -
°C
25 / 63
min. / max. water temperature
Cooling
Operating envelope -
°C
7
5)
/ 25
min. / max. water temperature
Device inlet water temp. 10 °C (i.e. ground water) - operation as “water-water”
Rated flow
m
3
/ h
3
3.5
Pressure drop at rated flow
kPa
15
20
Inlet temp. 30% solution of ethylene glycol in the device 0 °C (i.e. ground collector, borehole) - operation as “earth-
water”
Rated flow
m
3
/ h
2.2
2.6
Pressure drop at rated flow
kPa
16
18
Dimensions and mass
WPG H
Dimensions (W x H x D)
mm
700 x 1150 x 480
Transport mass
kg
136
139
Net mass
kg
129
132
WPG HK
Dimensions (W x H x D)
mm
700 x 1150 x 600
Transport mass
kg
139
146
Net mass
kg
132
138
Noise level
9)
Level of sound power
dB (A)
55
57
The level of sound pressure
dB (A)
47
49
at a distance of 1 m
The level of sound pressure
dB (A)
33
35
at a distance of 5 m
The level of sound pressure
dB (A)
27
29
at a distance of 10 m
Communication
Connection to BMS
MODBUS protocol (UTP cable – connection RJ45) –
RS 485
Connection to the internet
10)
UTP 5e cable - connection RJ45 - Ethernet
Miscellaneous
Protection class
Internal unit
IP20
1)
The marks heat source and heat sink or primary and secondary side of the device by default refer to the heating mode
although cooling mode and heat source and heat sink can switch according to the mode.
2)
Geothermal energy in heat pumps can be used via ground water (the so-called water-water systems) or via ground
collector or borehole (the so-called earth-water system). In case of a water-water system, the installation of an
intermediate heat exchanger is required because ground water can contain substances which could be harmful to the
components of the heat pump. Requirements regarding water quality are stated in the installation manual of the device.
The requirements must be taken into account! In case of an earth-water system, the use of an adequate antifreeze
agent is required.
3)
A water solution with up to 30% propylene glycol or ethylene glycol can also be used as secondary medium; the use of
other substances is prohibited or prior consultation with the manufacturer of the device is necessary. Requirements
regarding water quality are stated in the installation manual of the device. The requirements must be taken into account!
4)
The use of adequate antifreeze liquid is required. The data applies to the use of a 30 % solution of ethylene glycol.
5)
All devices are available also as reversible models which means they can also be used to cool. The factory setting of
the minimal supply pipe for heating lock is set to 12 °C (suitable for example for wall cooling etc.). If there is a need for
a lower outlet water temperature (i.e. Convector heating), the lock for outlet water can be lowered to 7 °C (by an
authorised commission contractor) but only in case the system is set up according to one of the hydraulic piping diagrams
from the current Catalogue of
Hydraulic Piping Diagrams
approved by the manufacturer of the device.
