Cabling ▯ Dimensions
ESBE System Units
RETURN TEMPERATURE UNIT
SERIES GST241
GST241 PN10
100/10/1
0
5
15
Psi/bar/Mpa
+136 +58
+32 0
+136 +212
+5
+41
Piping Schematics are General Representations
125
321 58
250
0º
*
Series GST241
1
Remove
Mounting position Pull up insulation
LVD 2014/35/EU
EMC 2014/30/EU
RoHS 2011/65/EU
ErP 2009/125/EU
PED 2014/68/EU, article 4.3
EnEV 2014
SI 2016 No. 1101
SI 2016 No. 1091
SI 2012 No. 3032
SI 2010 No. 2617
SI 2016 No. 1105
SERIES FUNCTION
GST241
Mtrl.nr. 98141125 • Ritn.nr. 7955 vers. A • Rev. 2022-12-08
ESBE AB
Bruksgatan 22
SE‒333 75 Reftele
www.esbe.eu
Application example
2 3
5
Fit supply pipes
Assembling on wall
Assemble insulation
4a
30mm
40-50Nm c/c 125mm
Press
Press
4bFit supply pipes
Adjust wallbracket
= Factory settings
Factory setting
3Commissioning
fixed temperature
50 - 70°C 50°C 54°C 58°C 62°C 66°C 70°C
The temperatures are only a reference and
might be different under certain conditions.
However the range will be kept.
https://esbe.eu/group/products/
solid-fuel-products/vtc400
SERIES VTC300/VTC400
Electric installation
Power
L
N
www.esbe.eu
0
20 MINUTES
Commissioning
Preparation
Open Closed
90
o
Open/Close Shut off valve
Flow
OPEN
AIR
CLOSE
Assemble removed knob
Wilo
Variable differential
pressure - Δp-v
Constant differential
pressure - Δp-c
Constant speed
PUMP CURVE
I, II, III
CONTROL MODE
NORMAL
OPERATION FAULT
NORMAL
OPERATION
FAULT
CONTROL MODE
Variable differential
pressure - Δp-v
Constant differential
pressure - Δp-c
Constant speed
PUMP CURVE
I, II, III
Wilo Display
LED display
Hold
Hold
Status
Locked
8 sec
Unlocked
Factory
setting
Venting
1 sec
1 sec
10 min
Manual
restart
Factory
setting
30sec
Hold
8 sec
Hold
3 sec
Hold
6 sec
Hold
+
1.4.3.2.
LED
Indicator
Meaning Diagnostic Cause Remedy
lights green Pump in
operation
Pump runs
according its
setting
Normal operation
blinks red/
green
Pump in
function but
stopped
Pump restarts
by itself after
the fault is
disappeared
1. Undervoltage U<160 V
or Overvoltage U>253 V
2. Modul overheating:
temperatur inside motor
too high
1. Check voltage supply
195 V < U < 253 V
2. Check water and
ambient temperature
blinks red Pump out of
function
Pump stopped
(blocked)
Pump does not restart by
itself due to a permanent
failure
Change pump
blinks
orange
Pump out of
function
Pump stopped Pump is not starting Change pump
LED off No power
supply
No voltage on
electronics
1. Pump is not connected
to power supply
2. LED is damaged
3. Electronics are damaged
1. Check cable connection
2. Check if pump is running
3. Change pump
http://www.esbe.eu/global/en/
products/circulation units
WILO - Faults, Causes and
Remedies
LED displayclick Control mode Pump curve
Recomended
Alt.
1Constant speed II
Constant speed I
Variable differential III
Variable differential II
I
III
6
II
I
III
2
3
4
5
7
8
9
Click
Click
Recommended Alternative
LED display Control mode Pump curve
Constant speed
Constant speed
Variable differential
pressure Δp-v
Variable differential
pressure Δp-v
Variable differential
pressure Δp-v
Constant differential
pressure Δp-v
Constant differential
pressure Δp-v
Constant differential
pressure Δp-v
Constant speed
Settings navigationsPump Settings 6
Application
information
Expose application info using leaflet
7
-
1
-
2
-
3
-
4
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