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OSO Delta HP VIP cylinders can
be fitted with all types of boilers.
Standard boilers operate using
room and cylinder thermostats.
Please follow upper diagram:
'Wiring for Standard Heat Pump'.
Thermistor controlled boilers
Many popular Heat pumps now
use a thermistor principle. A
thermistor temperature sensor is
supplied with the Heat Pump to
attach to the cylinder.
Temperature information is
relayed back to the Heat Pump
control system.
A Pocket is provided (see below
to secure the sensor on the Delta
HP VIP cylinder. The probe is run
through a channel from base of
cylinder to the immersion housing
and housed there in a pocket.
The thermistor cable should be
secured using the supplied
clamps in the bottom opening of
the channel. The supplied
motorised valve must be used in
accordance with Building
Regulation G3. This is wired from
the supplied cylinder thermostat,
wired as high limit stat Please
follow lower diagram:
'Wiring for Thermistor Controlled
Heat Pump'.
Probe position
Using cylinder thermostat as
high limit stat only - coil the grey
temperature probe wire inside
thermostat box and insert black
probe into thermostat pocket of
cylinder then turn dial on front to
number 5
Y Plan Wiring
Wiring USING OSO THERMOSTATS
Room
thermostat
T6360B
1
3
2
2
L
Isolated Mains
Supply From
1
Fused Spur
1
2
3
L
N
E
4
HTG
ON
ST6400
Programmer
Wiring for using heat pump differential controller
Room
thermostat
T6360B
1
3
2
2
L
1
Isolated Mains
Supply From
1 2 3
Fused Spur
L
N
E
HTG
ST6400
ON
Programmer
Channel
Piping
running
from
Diagram
base of
cylinder
Heat Pump
Mid Position Valve
OSO Cylinder Thermostat (supplied)
(not supplied)
N
V4073A1039
G/Y B1
W
Gr
O
3 2
N
E
2
3
4
5
6
7
3
1
HW
HW
ON
OFF
OSO Cylinder Thermostat (supplied )
wired as high limit Stat
Mid Position Valve
N
(not supplied)
V4073A1039
G/Y
B1
W
Gr
O
3 2
N
E
2
3
4
5
6
4
3
1
HW
HW
Heat pump differential controler
ON
OFF
2-port valve
Mid pos. valve
(supplied)
(not supplied)
Automatic
bypass
Zone Valve (DHW)
(supplied)
C
NC NO
V4043H
G
O
B1
1
2
8
9
10
2
3
2
3
L
N
E
L
N
E
Heat pump
Pump
Zone Valve (DHW)
C
(supplied)
NC NO
V4043H
G
O
B1
1
2
Thermistor wire
Connected to
7
8
9
10
Heat pump control
system
2
3
2
3
L
N
E
L
N
E
Pump
Radiators/
UFH
Pump
flow
Br
G/Y
3
Br
G/Y
3
8
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