Underfloor Heating Systems - Trianco Aztec Gold Installation & Opersting Instructions

ADDITIONAL FITTING INSTRUCTIONS - UNDERFLOOR HEATING SYSTEMS
When installed on an underfloor heating system without
the use of a mixing valve, the following instructions must
be adhered to.
IMPORTANT NOTE: Ensure the mains supply to the
boiler is disconnected before carrying out any work.
1) Replace the safety high-limit thermostat with the
alternative stat provided within the literature pack
(Fig. 15). See page 19 for more detailed
instructions on how to replace high-limit thermostat.
2) Using the white control knob on the front of the
PCB controller, the temperature must be set to its
lowest setting (30°C) before initial firing.
Important: The temperature should only be
subsequently increased in accordance with
underfloor heating manufacturer's instructions and
BS EN 1264-4.
3) After the temperature has been adjusted to the
preferred level, it may be useful to remove the
control knob from the PCB controller to prevent
further modification. Carefully pull the knob from
the PCB, ensuring its mooring is held securely in
position (Fig. 14).
Notes:
a) The factory-fitted safety high-limit thermostat is set
at 100°C, and is suitable for use with radiator
heating systems. The additional high-limit
thermostat, for exclusive use with underfloor
heating systems, is set at 60°C and must be
fitted. Failure to do so will result in damage to
the floor surfaces.
b) If the high-limit thermostat operates often, the
temperature may be set too high. It is essential
that the temperature is not set to above 50°C
(refer to Fig. 14 for temperature settings).
c) The pump fitted to this appliance is suitable for a
Ø
15mm plastic pipework run of up to 100m in
length. Pipework runs greater than this will require
the fitting of an additional pump.
d) Fit the underfloor heating system in accordance
with manufacturer's instructions. Trianco cannot
accept any responsibility for breakdowns or
damage caused by incorrectly-fitted systems.
CONTROL KNOB SETTINGS
FIG. 14 - CONTROL KNOB
1 - ISOLATE ELECTRICAL SUPPLY
2 - REMOVE THE BOILER FRONT CASING
3 - REMOVE CABLES FROM HIGH LIMIT STAT
4 - LOOSEN 2 X RETAINING CLIPS
5 - REMOVE THERMOSTAT & REPLACE IN REVERSE
ORDER
FIG. 15 HIGH LIMIT THERMOSTAT REPLACEMENT
10