7
USERS INSTRUCTIONS
The Trianco Aztec Combination boiler has been designed
and constructed to give years of trouble-free service and
these instructions are provided to assist you in obtaining
the best performance with the least trouble and cost.
The boiler is fully automatic in operation and requires little
attention other than the setting of the thermostat and any
external system controls such as a room thermostat and
time switch.
IMPORTANT
DO NOT COVER OR BOX IN YOUR BOILER, ALLOW AIR TO
CIRCULATE FREELY AROUND THE APPLIANCE
WARNING: DO NOT ATTEMPT TO SWITCH ON THE
BOILER IF THERE IS ANY POSSIBILITY THAT THE WATER
INSIDE THE HEAT EXCHANGER IS FROZEN
Before firing the boiler, ensure the system is full of
water and any valves fitted to the system are open.
Switch on the electrical supply to the boiler and after a few
seconds the boiler’s green and amber should illuminate.
Check that the time switch/programmer is ON and the
room thermostat is calling for heat.
Set the boiler to required temperature using the control
buttons.
Set the domestic hot water primary flow temperature
using the adjustable control on the front cover.
The domestic hot water outlet temperature should be set
by the installer. (Factory set @ 45°C)
Set the time switch/programmer to the times and
programs required.
The boiler will now operate automatically, cutting in and
out according to heat demand.
TO TURN OFF THE BOILER
Switch off the boiler at the time switch/programmer.
If the boiler is to be switched off for any length of time it is
recommended that the mains supply to the boiler is
switched OFF.
TEMPERATURE CONTROL
Your Trianco boiler is fitted with two adjustable
temperature control thermostats to regulate the
temperature of the domestic hot water and central
heating.
Use the Buttons on the facia to set the heating flow
temperature between 35°C – 75°C
Use the small control knob to adjust the flow temperature
to the domestic hot water heat exchanger between
60°C -85°C
The boiler is equipped with a thermostatic blending valve,
it is recommended when commissioning the boiler this is
set to 45°C to obtain the best performance from the boiler.
BOILER INDICATOR LIGHT
There are twelve LED indicator lights on the boiler fascia
panel these are:
LED 1 GREEN
Power to the boiler.
LED 2 AMBER
Illuminated - In run mode
Flashing - Temperature satisfied
LED 3 RED
Boiler fault
If the RED LED light flashes, this means a fault has
occurred. This would result in the boiler continuing to
operate at a reduced output.
If the RED LED is permanently on, this indicates a fault has
occurred. (See simple fault finding on page 8).
LED 4 – 12 Green
Heating & Hot water
set
temperature lights.
The boiler has two neon indicators behind the fold down
panel indicating Hot water demand or Heating mode.
ROOM THERMOSTAT
The room thermostat should not be positioned near a
source of heat such as a radiator or exposed to the sun as
this will cause the central heating to switch off before the
room is up to temperature. Follow the manufacturer’s
instructions for best siting position for the thermostat.
FROST PROTECTION
If the boiler and central heating is shut down for many
hours during very cold weather, the water may be in
danger of freezing and, as such, it is advisable to protect
the installation with a frost thermostat.
Where the system is not protected, the boiler should be
left switched on and the room thermostat set to a low
setting e.g. 7°C (45°F) to prevent the building temperature
falling too low.
If the system is shut down for a long period during very
cold weather, it is advisable to completely drain the
system. However, frequent draining should be avoided,
especially in hard water areas, as this could lead to scaling
of the boiler waterways.
TIME SWITCH/PROGRAMMER
(Not Supplied) This will be a twin channel type capable of
switching Heating and Hot Water. The boiler is capable of
accepting all modern controls including Hive, Nest, Salus
etc.
Cleaning Casings
Use hot soapy water applied with a damp cloth for the
enamel, then dry with a soft dry cloth.
Simple Maintenance
Ensure that the natural ventilation around the boiler is not
obstructed. If fitted in a compartment, ensure all
ventilation grilles are clear.
