gledhill TEC140-OV Installation & Servicing Instructions Manual page 17

Wiring The Control Panel
The control panel requires a separate 3 amp fuse spur double pole to ensure safe
isolation. The cable/flex from the fuse spur to the control panel must be a minimum
of 0.75mm C.S.A. and be heat resistant. The cable should be clipped to prevent
2
accidental snagging.
The control panel front cover is secured by 4 black screws. Remove these and lift off
the front cover to expose the power terminals. These are found at the bottom left of
the control panel. Prepare the cable end and feed it through the cable gland.
Use a screwdriver to press the neutral cross down on the WAGO connector. This opens
the clamp and the neutral wire can be fed into the connector. Remove the screwdriver
and test the wire is securely fit. Repeat with the PE and live cables. Tighten the cable
gland and check for security. Perform the necessary safety checks and refit the front
panel.
2 4
J19
1 3
2 4
J20
1 3
7
14
6 13
5 12
4 11
J18
10
3
2 9
8
1
J7
J3
2
8 7 6 5
1
4 3 2 1
Fuse
To
DHW
pipe
Secondary Hot Water Circulation
If the length of the hot water draw-off pipework is excessive and the delivery time
will be more than 60 seconds before hot water is available at the tap, you may wish to
consider using trace heating to the hot water pipework such as the Raychem HWAT
system. Also a conventional pumped secondary circulation system (shown below)
can be used with any model of the Torrent.
Flow switch
Plate heat exchanger
Cold water sensor
Inline lter &
ow regulator
Single check
valve
Cold water inlet
It is important that the cold water pipework is adequately separated and protected
GND GND
IN OUT
T1 T2
2
2 3
1
TS sensor
J1 1
4 5 6
2
CW sensor
1
J8
6 1
7 2
8
3
9
4
10 5
E – G/Y
N - Blue
L - Brown
PR61
Hot water outlets
Pump isolation
valves
Control
stat
Single Secondary
check circulation
valve pump
Potable water
expansion vessel
INSTALLATION
from any heating from the hot water pipework
to ensure that the water remains cold and of
drinking water quality.
If secondary circulation is used, there is a
possibility that excessively hot temperatures
may be experienced in the hot water supply
pipework due to the blending valve not being
able to mix with cold water because the water
is always supplied hot. A pipe thermostat is
incorporated in the circuitry which cuts the
supply to the pump when the water in the
return pipe reaches the set temperature of the
blending valve.
Secondary circulation pipework must be
insulated to prevent energy loss in both heated
and unheated areas.
Combined flow
and
HW temperature
sensor
Immersion Heaters
All the these sensor inputs carry a
Voltage of 5V.
The max cable length is 1 meter.
The sensors connected to the control
Should be free from the appliance earth
be reset and must be replaced if it has operated.
They have incalloy elements to prolong their
life expectancy in aggressive water conditions.
The correct method of connecting the wiring to
the immersion heater is shown here.
Utilising Off Peak Electricity
Where it is intended that units are fitted to offpeak
circuits, then suitable controllers such as the
Horstmann off peak electric time controller will
be required. External wiring to the immersion
heaters must be in accordance with the relevant
IEE Wiring Regulations and the circuit must be
protected by a suitable fuse and a double pole
isolating switch.
Pipework length and
Safety
diameter to suit
property demands
The immersion heaters must be earthed and they
must be isolated from the mains before the cover
is removed on every occasion. Replacement
immersion heaters should be obtained from
Gledhill Building Products Limited.
Pipework length and
diameter to suit
Important
recirculation ow rate
approx 1-2 l/min
The unit must not be powered up unless the
thermal store has been filled with water, the
pump has been bled and water is confirmed
Page 17
These are 3kW
230V AC heaters
Thermostat
E
L
and incorporate
N
a t h e r m o s t a t .
The thermostat
i n c o r p o r a t i n g
a 's i n g l e s h o t '
overheat energy
c u t o u t w h i c h
Immersion Heater Wiring
means it cannot
INSTALLATION