Worcester DANESMOOR FS12/18 Installation And Servicing Instructions page 15

c) Remove the two control box retaining screws and slide
the control box forward, as shown in the figure below.
d) Remove the four fascia retaining screws and position
the fascia assembly on the two fascia location lugs as
shown below.
Slide control box forwards on side rails
Control box
retaining screws
Control box
cable clamp
Fascia
locating lugs
10.3 Mains Wiring
Mains supply – 230V AC ~ 50 Hz 5A External Fuse to BS1362.
LIVE - Brown, NEUTRAL - Blue, EARTH - Green/Yellow
Mains Cable: 0.75mm 2 (24 x 0.20 mm) to BS 6500 Table 16.
A mains cable should be connected to a double pole isolator
with a contact separation of 3mm on both poles and supplying
the appliance controls only.
The boiler and system controls must be supplied using a single
fused supply.
To connect to the mains supply cable:
1) Feed the cable into the rear of the cabinet avoiding any hot
surfaces.
2) Remove the control box cable clamp retaining screw (as
shown above) and pull its inner out to allow the cable to be fed
through. Slacken the P-clip on the cabinet top bracket to allow
the cable to be fed through.
3) Feed the cable through the P-clip, through the cable clamp,
and fasten the cable to the terminals marked L (Live), N (Neutral)
and E (Earth) on the control box terminal strip.
4) Secure the cable clamp and P-clip, and ensure 450mm of
cable is left between the two clamps.
10.4 Programmer
(See Fig. 16a).
A plug in, colour co-ordinated, 2 channel electronic programmer
is available from Worcester, Bosch Group. Full instructions cov-
ering installation and operation of the programmer are included
with the kit.
The programmer will give fully independent central heating (CH)
and hot water (HW) programmes when the pins on the rear of
the unit is set to pumped.
(See Fig. 16b).
If an external programmer is to be fitted to the boiler the link
plug should be removed from the programmer terminal strip.
The LIVE, NEUTRAL and EARTH wires should be connected to
the LIVE, NEUTRAL and EARTH terminals on the main terminal
strip and the switched lines connected to terminals 1 and 2.
NOTE: The mains supply cable should not be connected to an
external time switch when a frost thermostat is fitted to the
Danesmoor standard wiring block.
NOTE: Under no circumstances should the timer be connected
to a separate electrical supply. Safety is assured by a single
fused supply to the boiler.
10.5 Safety Check
In the event of an electrical fault after the installation of the
appliance, the electrical system should be checked for short
circuits, fuse failure or incorrect polarity of connections.
10.6 Pre-wired Remote 3 or 2 port valve control sets
(See Fig. 17).
If the system is fully pre-wired at a junction box remotely from
the boiler it can be connected to the boiler. The diagram shows
connection details for a 3 or 2 port valve control set.
Fascia retaining screw The Worcester fascia mounted programmer can be fitted instead
of an external programmer to the remote junction box. Remove
the link plug (8 to 9) and connect the programmer plug into the
time clock connector. Connect terminal 1 from the boiler termi-
nal block to the 'HOT WATER ON' on the remote 10 way junction
box. Connect terminal 2 from the boiler terminal block to the
'HEATING ON' on the remote 10 way junction box..
NOTE: A 3 port valve control set requires a live feed from 'HOT
WATER OFF ' switch position. In order to achieve this, using a
Worcester programmer, remove the orange wire from terminal 9
and pull back through the tie wraps. Ensure the brown wire is
firmly secured in terminal 9. Connect the orange wire to terminal
6 and connect terminal 6 on the boiler terminal block to the
'HOT WATER OFF' connection at the remote 10 way junction box.
10.7 2 port valve control set
(See Fig. 18).
The 2 port valve control set provides complete control on instal-
lations having pumped circulation to both the domestic hot
water and radiator circuits.
The domestic hot water and radiator circuits are independently
controlled by two motorised valves via a cylinder thermostat
and a room thermostat. Both thermostats switch the water
circulator and the boiler on and off.
10.8 3 port valve control set
(See Fig. 19).
The 3 port valve control set provides complete control on instal-
lations having pumped circulation to both the domestic hot
water cylinder and radiator circuits.
The domestic hot water and radiator circuits are controlled by a
3 port motorised valve via a cylinder thermostat and a room
thermostat. Water flow is diverted to either circuit or to both
circuits at the same time. Both thermostats switch the water
circulator and the boiler on and off.
Note: The 3 port valve control set requires a live feed from the
"hot water OFF" switch position. In order to achieve this, using a
Worcester programmer, remove the orange wire from terminal 9
and pull back through the tie wraps. Do not attempt to cut the
tie wraps. Ensure that the brown wire is firmly secured in termi-
nal 9. Connect the orange wire to terminal 6.
10.9 Semi-Gravity Control Set
(See Fig. 20).
As supplied the boiler will give a gravity hot water output when
HW is selected or a pumped heating circuit and gravity hot
water supply when CH and HW is selected. The hot water and
central heating temperature is controled by the boiler control
thermostat. Additional control may be obtained by the use of a
room thermostat, having removed the link from terminal 2 to 4.
10.10 Frost Protection
(See Fig. 21).
For full frost protection a single pole double switch thermostat
should be fitted so that both the boiler and the circulating pump
circuits are energised under frost conditions. Frost protection
will be lost if there is no power supply to the boiler.
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