Set The Programmable Room Thermostat; Preliminary Electrical Checks; Check Operation Of The Electric Boiler - Heatrae Sadia ELECTROMAX Installation & Servicing Instructions Manual

7.4 Set The Programmable Room
Thermostat
(a) Fit the batteries
programmable room thermostat. The
battery compartment is located behind
the hinged cover under a snap fit panel.
Ensure the batteries are inserted with the
correct polarity (i.e. "+" to "+", "-" to
"-".)
(b) Using the instructions supplied with the
programmable room thermostat set the
time and day on the clock display.
(c) The programmable room thermostat is
supplied with a number of factory preset
programmes, these are listed in the
instruction leaflet. These can be reset to
other periods depending on the users
requirements.
(d) NOTE: To obtain lower running costs it
is recommended that central heating
on times be programmed to co-incide
(wherever feasible) with any "Off-Peak"
tariff periods available during the day. The
Economy 10 tariff will provide at least two
periods during the day at a lower cost "Off-
Peak" rate, refer to table 2, page 20 for
details of the available "Off-Peak" times
from various electricity suppliers. Heating
times can, of course, be programmed to
run outside these times.
(e) NOTE: The
thermostat does not control the domestic
hot water (DHW) heating times.

7.5 Preliminary Electrical Checks

(a) Check all electrical connections are tight.
Loose connections can cause over-heating
of terminals and the possibility of a fire.
(b) Check all earth
connected, are tight and un-damaged.
(c) The electrical system should be checked
for earth continuity, short circuits, polarity
and resistance to earth.
(d) The immersion heaters are factory set to
give a hot water storage temperature of
approx. 60°C (between graduations 4 and
5 on the thermostat). The full temperature
adjustment range is from 10° to 70°C
supplied to
programmable room
bonding links
(1 to 5 on the thermostat). If required
the thermostats should be readjusted
by isolating the electrical supply to the
the immersion heaters and then removing the
immersion heater covers and rotating the
thermostat adjustment knob (see diagram
18, page 25) using a flat bladed screwdriver.
Replace the covers before operating the
unit.

7.6 Check Operation of the Electric Boiler

(a) Switch on the 24 Hour electrical supply
and Boiler supply MCB's. Switch on the
isolation switches.
(b) Switch on the CH "on" switch (see
diagram 19, page 26). The switch should
be illuminated when on.
(c) Set the
(see diagram 19, page 26) to minimum
position.
Temperature
Adjustment
Diagram 18 Immersion Heater Thermostat
(d) Set the programmable room thermostat
to be calling for heat (the set programme
are
may need to be over-ridden to do this,
refer to the instructions supplied with the
programmable room thermostat.
(e) The boiler "DEMAND" indicator will flash
green and the pump should run.
(f) After approx. 2-3 minutes the "DEMAND"
indicator will remain illuminated green (no
longer flashing) and the "HEAT" indicator
will illuminate. The height of the "HEAT"
indicator will vary as the boiler heat input
Installation & Servicing Instructions
"FLOW TEMP" adjustment
Thermal Cut-out
Reset Button
Thermostat
25