Glow-worm Flexicom sx - Manual (Page 6)

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INTRODUCTION
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Boiler Design
Boiler Design
These boilers are designed for use as part of a sealed water
central heating system with fully pumped circulation. The
pump, expansion vessel and associated safety devices are all
fitted within the boiler. The daily pump exercise programme
combined with the built-in frost protection will help to maintain
and protect the boiler. Once the controls are set the boiler
operates automatically.
Range Rating
The boilers are fully modulating, it is therefore not necessary to
range rate them. However, if desired, it is possible to range rate
the boiler between 10 and Max. output (according to the model),
in 1kW increments, refer to section 10.
Electrical Supply Failure
The boiler will not work without an electrical supply.
Normal operation of the boiler should resume when the
electrical supply is restored. Reset any external controls, to
resume normal operation of the central heating. If the boiler
does not resume normal operation press the reset button. If
the boiler does not resume normal operation after this call your
Installation/Servicing company or Glow-worm service.
Overheating Safety
The boiler software is designed to recognise the potential for
an overheat lockout and will shutdown before this happens. To
restart the boiler, press the reset button on the controls fascia.
If the boiler fails to resume normal operation and all external
controls are calling for heat, then call your Installation/Servicing
company or Glow-worm service.
Safety Discharge Valve
A safety discharge valve and discharge pipe are fitted to the
boiler. This valve must not be interfered with, should there be
any discharge from the pipe, isolate the boiler electrical supply
and call your installer or Glow-worm’s own service organisation
using the telephone number on the inside front cover of this
booklet.
Safety Devices
Frost protection
The appliance has a built in frost protection device that protects
the boiler from freezing. With the gas and electric supplies
ON and irrespective of any room thermostat setting, the frost
protection device will operate the pump when the temperature
of the boiler water falls below 8°C.
A timer is used so that the temperature can be checked
periodically. After 10 minutes the pump will be stopped if the
temperature is higher than 10°C or has already reached 35°C.
The burner will activate if the boiler temperature does not reach
10°C after 30 minutes or at any time if the temperature drops to
5°C.
The burner will switch off when the temperature reaches 35°C.
Condensate Drain Blockage
As a safety feature the boiler will stop working if the condensate
drain becomes blocked. During freezing conditions an ice
blockage in the condense drain, external to the house would
also activate the safety feature. Use warm cloths on the pipe to
release an ice blockage.
Once the blockage is removed the boiler should then restart.
Condensate Drain
A plastic drain pipe must be fitted to allow discharge of
condensate to a drain. Condensate should, if possible, be
discharged into the internal household draining system. If
this is not practical, discharge can be made externally into the
household drainage system or a purpose designed soak away,
see section 8 for more details.
Pluming from flue terminal
Like all condensing boilers this appliance will produce a plume
of condensation from the flue terminal in cool weather. This is
due to the high efficiency and hence low flue gas temperature
of the boiler. This is normal and not an indication of a fault.
Servicing, Maintenance and Spare Parts
Servicing and Maintenance
To ensure the continued efficient and safe operation of the
boiler it is recommended that it is checked and serviced as
necessary at regular intervals. The frequency of servicing will
depend upon the particular installation conditions and usage.
If this applaince is installed in a rented property there is a duty
of care imposed on the owner of the property by the current
issue of the Gas Safety (Installation and Use) Regulations,
Section 35.
Servicing/maintenance should be carried out by a competent
person approved at the time by the Health and Safety
Executive in accordance with the rules in force in the countries
of destination.
To obtain service, please call your installer or Glow-worm’s own
service organisation using the telephone number on the inside
front cover of this literature.
After servicing, complete the relevant Service Interval Record
section of the Benchmark Checklist located on the inside back
pages of these instructions.
Spare Parts
We only use parts that you can be assured conform to
the safety and performance specification. DO NOT use
reconditioned or copy parts that have not been clearly
authorised by Glow-worm.
If a part is required contact Glow-worm’s own service
organisation using the telephone number on the inside front
cover of this booklet.
Please quote the name of the appliance, this information will be
on the name badge on the front of the appliance.
If in doubt seek advice from the local gas company or Glow-
worm’s own service organisation using the telephone number
on the inside front cover of this booklet.