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cable as follows, providing the system has
a separate cold feed and vent pipes
(close coupling is acceptable) see BS
5449 for further details.
a. Re-position the overheat thermostat to
Gravity DHW position as explained
under 2.4, page 19.
b. Switched live from external control
circuit to MAINS 'SwL'.
c. Fit a link between terminals MAINS
'SwL' and MAINS 'L'
d. Neutral to MAINS 'N'.
e. Earth to MAINS 'E'.
f. The pump should be wired externally.
3. Take up excess slack in the cables
between the terminal block and the cable
clamp, then tighten the cable clamp
screws.
Ensure sufficient slack is available to the
cable clamps to allow the control panel to
hinge freely. Check by opening the
control panel.
If fitting the optional integral programmer
go to section 2.6 before performing steps
4 and 5 below.
4. Secure the controls assembly to the
chassis using the screw previously
removed.
5. Carry out preliminary electrical system
checks i.e. Earth Continuity, Short Circuit,
Polarity and Resistance to Earth.
Frost Thermostat:
If a Frost Thermostat is to be fitted, the
connections should be made in the wiring
external to the boiler. Refer to the wiring
instructions with the thermostat.
Do not switch on the electricity supply
at this stage.
2.6
Install the Optional Programmer
1. If fitting the optional integral programmer,
refer to the instructions supplied with it for
installation and wiring details.
Publication No. 5102977
Fig. 21
Installation
21
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