Page 14
INSTALLATION
INST
ALL
A
T
ION
Safety
Cut-out
Thermostat
Immersion Heater Wiring
E
L
N
Temperature/pressure 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
These are 3kW 240V AC heaters and incorporate a thermostat and a manually reset
energy cut-out which operates at 80°C. They have incalloy elements to prolong their
life expectancy in aggressive water conditions.
Two immersion heaters are fi tted to all direct models and the indirect 250 and 300
models. All other models have one immersion heater fi tted. Where it is intended that
units are fi tted 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.
The correct method of terminating the wiring to the immersion heater is shown
opposite.
Line Strainer
This is integral within the combination inlet group to reduce the likelihood of
contaminants fouling the valve seat. Following installation this line strainer must be
cleaned and replaced. This needs to be carried out on a regular basis. as part of the
annual maintenance/service check.
Tundish
This is to allow the discharge from any Relief Valve to be seen. It must be fi tted away
from any electrical devices. See page 13 for discharge pipework details.
Safety
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.
Control/overheat Dual Thermostats
Care must be taken to ensure that the solar probes are fully inserted into the pockets
provided.
Summary of Contents for Stainless Lite Direct 90-300 litres
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