User Instructions; Introduction; How To Use The Boiler - Trianco Contractor WM70 HE INTERNAL User, Installation, Commissioning & Servicing Instructions

1. USER INSTRUCTIONS

Please note, to assist Trianco in improving customer service, it
is important that the guarantee/registration card is returned.

INTRODUCTION

The Contractor WM70 HE 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 designed to provide both domestic hot water and
central heating. It is supplied with an adjustable boiler
temperature control thermostat and a manual-reset high-limit
thermostat, requiring little attention other than the setting of
any additional system controls (such as a room thermostat or
programmer).
TO FIRE THE BOILER
Before firing the boiler, ensure that the system is full of water,
that there is a sufficient level of oil in the storage tank, and that
all isolation valves are fully open.
Check that the time-switch/programmer is on and that the
room thermostat is calling for heat.
Set the boiler thermostat (fig 1) to the desired temperature.
Switch on the electrical supply; the burner will fire up and
continue to run until the boiler reaches the temperature set on
the boiler thermostat.
Set the time-switch/programmer to the times and programme
required. The boiler should now operate automatically, cutting
in and out according to the heat demand.
TO STOP THE BOILER
The boiler may be switched off by turning off the boiler control
thermostat fully anti-clockwise to the off position, 'O'.
If the boiler is to be off for a long period of time, it is
recommended that the mains supply to the appliance is
switched off, or the time-switch/programmer (if fitted) is set to
the OFF position.
FIG 1
BOILER CONTROL THERMOSTAT
The boiler control thermostat allows you to adjust the
temperature of the water leaving the boiler. It is calibrated
between High and Low, in five intermediate settings,
corresponding to a temperature range between 80°C (High)
and 55°C (Low). The thermostat is switched off when the knob
is turned fully anti-clockwise to the 'OFF' position.
Experience will tell you which is the most economical setting to
suit your household.
HIGH-LIMIT THERMOSTAT
The high-limit thermostat is factory-set and requires no
adjustment. Should the boiler thermostat malfunction and the
water temperature rise to 110°C, the limit thermostat will take
over and shut down the appliance.
The limit thermostat is located on the front of the control box
and can be reset by pushing in the red button. If the thermostat
operates frequently, consult your service engineer, as there
may be a fault in the system.
Note: the high-limit thermostat can only be reset when the
water temperature has dropped by at least 20°C.
BURNER LOCK-OUT
If the burner fails to light for any reason, the boiler will go into
lock-out mode, indicated by the illumination of the reset button
on the burner control box (fig 2). To reset the burner, press
this button. If the burner returns to lock-out, wait for one minute
before pressing the button again.
If the burner still fails to light, follow the simple fault-finding
guide (page 5), before switching off the electrical supply to the
boiler and contacting your service engineer if the failure
persists.
Important: do not attempt to reset the burner more than
twice – constant attempts to do so may cause permanent
damage to components within the burner.
BOILER LOCK-OUT
LIGHT &
RESET BUTTON
FIG 2
4