Page 16
Lift Up Pressure & Temperature Relief Valve
This safety device is also pre-set at the factory and relieves before the temperature
reaches 100°C. It is also a Pressure Relief Valve, and is pre-set to 6 bar.
Immersion Heaters
The immersion heaters fitted to our units are 3kW 240V ~AC. Check that the mains
supply conforms to this, and all external wiring conforms to the most recent
revision of the IEE wiring regulations. An Incoloy element is used on this product for
standard domestic use and water conditions, use our Titanium elements in all other
circumstances, part number SH002.
The immersion heater is fitted into the hot water cylinder using an O-ring. After the
unit is filled with water check for leaks to determine if the O-ring has sealed and
tighten carefully using the appropriate tool. To prevent damage to the O ring do not
use excessive force to tighten the immersion heater.
The immersion heater is supplied with a thermostat which has been tested
for operation in the cylinder and complies with the European directives for
Electromagnetic compatibility and radio interference. It is Rated at 16 Amp 250V ~AC.
Immersion Heater Wiring
E
L
N
INSTALLATION
INSTALLATION
The immersion thermostat has two terminals
A and B. The Live (brown) wire should be
connected to terminal A and the Neutral (blue)
wire should be connected to terminal B. It has
been our experience that Crimp terminals make
better connections. The immersion heater must
be fully earthed (earth post) and connected via
a double pole isolator switch having a contact
separation at least 3mm, see diagram opposite.
Danger of electrocution: before making any
adjustments to the thermostat isolate the
immersion heater from the mains electricity
supply at the fuse spur unit.
The immersion heater thermostats incorporate
a manual reset safety/overheat cut out
thermostat. Should this operate, investigate the
cause for the operation cut out before pressing
the red reset button labelled safety. If there is no
apparent fault adjust the control setting down
slightly to prevent nuisance tripping.
If another heat source is used to heat the
cylinder and this is allowed to raise the water
temperature excessively then the overheat
thermostat will trip. This is likely on solar
thermal products when the solar thermostats
are set at high temperatures.
The Direct cylinder is intended to be heated
from an off peak supply using the lowest
immersion heater(s) and boosted via the upper
immersion heater from an on peak supply.
Suitable controllers are available to control this
operation effectively.
Solar Thermistors / sensors
Care must be taken to ensure that the solar probes
are fully inserted into the pockets provided.
Important
Failure to follow the drain down procedure will
invalidate the warranty. (see page 22)
NEVER
drain the cylinder of hot water and
then close all cylinder inlets and
outlets.
REASON
as the air remaining in the cylinder
cools the pressure inside the
cylinder will fall below atmospheric
and cause damage to the cylinder.
NEVER
close the cold main and drain the
cylinder via any tap connected to it.
REASON
as the water drains, the pressure
inside the cylinder may decrease
below atmospheric and this may
cause damage to the cylinder.
In line with good plumbing practice, use of
excessive flux should be avoided.
I.V.
Combination Valve
I.V.
If two Stainless Lites are coupled together the secondary inlet and outlet pipes must
be balanced. The units must be fitted on the same level.
Note: No valves must be fitted between the expansion vessel and the storage cylinder(s).
Thermostat Type TSR fitted in the
Direct cylinders; is supplied set at
62°C ± 3°C. Position 4 is 55°C ± 3°C
and position 5 is 68°C ± 3°C.
Thermostat Type TSE fitted in the
indirect cylinders - is supplied set
in position 5 at 60°C ± 4°C.
When ordering a replacement
part the TSR thermostat type will
be supplied with the immersion
heater.
