OSO HOTWATER 1327051, Installation Manual

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11
RESET
RES
ET
M2
1
2
3
4
TH E RM - O - D I S C
1
2
RESET
RES
ET
M2
1
2
3
4
TH E RM - O - D I S C
1
2
Cable
clamp
Element
L N
Immersion
thermostat
Switched
live
Live
feed
Y-plan
terminal
Cylinder
thermostat
separation required. All electrical wiring should
be carried out by a competent electrician, using
a heat resistant Flexible cable (minimum 90°C),
and be in accordance with the latest IET Wiring
Regulations.
Immersion Heater rating is 230V x 2,8 kW.
4.4 System wiring
Motorised valve: To comply with regulations gov-
erning the installation of indirect unvented cylin-
ders, a motorised valve must be fitted in the pri-
mary pipework.
Your OSO unit has been supplied with a two port
motorised valve, which will act as a positive en-
ergy cut-out should the safety cut-out operate.
The motorised valve will also control the tempera-
ture of the domestic stored water via the cylinder
thermostat, which is located in the electrical box.
The unit should be installed on an “S” or “Y” plan
system.
Please follow the wiring instructions carefully.
The working thermostat which controls the tem-
perature of the domestic hot water is adjustable
between 40°C - 70°C. A safety cut out is also in-
corporated within the thermostat and will oper-
ate at 85°C ± 3°C. Should the safety cut out be
brought into operation, the motorised valve will
operate and close down the primary flow to the
cylinder. To reset the safety cut-out and the mo-
torised valve the reset button must be pressed in.
If using a 6-wire 28mm or 1” BSP V4043H on ei-
ther circuit the white wire is not needed and must
be made electrically safe.