48
Pump Specification
Table A-1:
Pump Specification
Make and Model
Wilo Yonos PARA RS 15/7.0 RKC FS 130 12
Construction
Pump housing
Cast iron (with cataphorisis treatment)
Impeller
PP composite with GF 40%
Pump Shaft
Stainless Steel
Bearing
Carbon, metal impregnated
Protection Class
IPx4D
Insulation Class
F
Motor Protection
Integrated
Performance
Max Delivery Head
7.2m @ Q = 0 M³ /h
Max Volume Flow
3.3 0 m³ /h
Minimum Suction Head @ 50/95°C
0.5/4.5m
Power Consumption @ 1 - 230V
3 - 45W
Nominal Motor Power
37W
Current @ 1 - 230V
0.028 - 0.44 A
EEI
≤
0.20
Speed
800 - 4650 rpm
Settings
Δ
P-variable (1 - 7m head) and Constant Speed
(I, II and III)
Application
Maximum Static Pressure
PN6
Temperature Range @ Max Ambient Temper-
atures
Max Ambient temperature 57°C: 0 to 95°C
Max Ambient temperature 59°C: 0 to 90°C
Max Ambient temperature 67°C: 0 to 70°C
Approved Fluids
Heating Water
Water/Glycol – Max 1:1 (above 20% check
pumping data)
a
High Efficiency Circulating Pump
Pump Control Panel
Wilo Yonos PARA RKC circulating
pumps have two possible setting
modes:
•
Constant speed with three pump
speed settings (I, II and III)
•
Variable pressure (Δp-v) with pump
head adjustable between 1 and
7m head
Figure A-2 shows the pump control
panel with the red selector knob.
Constant Speed mode (i, ii, iii)
This is the default setting of the pump
and as such is recommended by Grant
for heating systems. In this mode
the pump speed is not automatically
regulated (as with the Variable Pressure
Mode), but operates at constantly at
one of the three possible speeds (set
Electrical Cable
T
he pump is supplied with a 3-core
mains cable fitted with a moulded plug
to provide a safe but easy connection at
the pump. Refer to Figure A.
On Combi boilers two pumps will
be fitted – one in the Heating Flow
pipework in the boiler and the other in
the internal Hot Water pipework of the
boiler. The Heating pump will have a
Black cable whilst the Hot Water pump
will have a White cable.
To disconnect the plug: Check that the
power to the boiler is switched off. Then
simply pull the plug off the socket on
the pump.
using the red selector knob on the
pump control panel).
Variable Pressure mode (Δp-v)
In this mode the electronic control
changes the differential pressure
setpoint to be maintained by the pump
in a linear fashion between Hs (the value
set using the red selector knob on the
pump control panel) and ½ Hs. The
differential setpoint varies linearly with
the volume flow Q.
indicator LEd
The pump is fitted with an indicator
LED. This is located around the
circumference of the red selector knob.
Refer to Figure A-2. This indicates the
operating status of the pump and will
be illuminated green when the pump is
operating normally.
This indicator LED can assist in
diagnosing and rectifying faults. See the
fault diagnosis section of this Appendix.
Setting the Pump Control
mode
Set the pump to one of the two
operating modes as follows:
Constant Speed mode (i, ii, iii)
Grant recommends this operating mode
for the pump.
To set the pump to the ‘Constant
Speed’ mode, the pointer on the red
selector knob must be set to the RIGHT
of the mid position. Refer to Figure A-2.
Set it to point at the required speed
setting, I, II or III as required, ensuring
that there is adequate flow to distribute
the heat from the boiler whilst avoiding
high water velocities causing noise in
the pipework.
imPOrtant
in the case of the Hot Water pump
in the Grant Vortex Pro Combi
boilers, the pump must always only
be set to speed setting iii.
Variable Pressure mode (Δp-v)
To set the pump to the ‘Variable
Pressure’ mode the pointer on the red
selector knob must be set to the LEFT
of the mid position. Refer to Figure A-2.
The further anticlockwise it is set the
greater the pressure head setting of the
pump – from 1m to 7m head.
If this mode is to be used, set the
