Intergas Heating Ltd is a licensed member of the Benchmark Scheme which aims to improve the standards of installation and commissioning of domestic
heating and hot water systems in the UK and to encourage regular servicing to optimise safety, efficiency and performance. Benchmark is managed and
promoted by the Heating and Hotwater Industry Council. For more information visit www.centralheating.co.uk. Please ensure that the installer has fully
completed the Benchmark Checklist on the inside back pages of the installation instructions supplied with the product and that you have signed it to say that
you have received a full and clear explanation of its operation. The installer is legally required to complete a commissioning checklist as a means of
complying with the appropriate Building Regulations (England and Wales). All Installations must be notified to Local Aerea Building Control either directly or
through a Competent Persons Scheme. A Building Regulations Compliance Certificate will then be issued to the customer who should, on receipt, write the
Notification Number on the Benchmark Checklist. This product should be serviced regularly to optimise its safety, efficiency and performance. The service
engineer should complete the relevant Service Record on the Benchmark Checklist after each service. The Benchmark cheklist may be required in the
event of any warrranty work and as supporting documentation relating to home improvements in the optional documents section of the Home Information
Pack.
1 OPERATION OF THE APPLIANCE
The purpose of the Intergas Combi Compact HRE wall mounted gas fired boiler is to heat water and to supply it to the central heating
(CH) system and the domestic hot water (DHW) taps. The heat exchanger comprises of two separate systems for central heating and
DHW. The appliance is fitted with a modulating control. This means that the power is adjusted in line with the required heat. The boiler
controller responds to each call for heat from the heating or the DHW system by igniting the burner and monitoring the flame.
1.1 Operation of the central heating
The call for heat arises as a result of the room temperature being lower than the temperature set on the room thermostat. If at that time
the appliance does not have a call for DHW, the appliance comes on in central heating mode. The central heating temperature control
modulates on the basis of the set central heating supply temperature. This means that when the desired central heating supply
temperature is approached the appliance adjusts the power. The pump for the central heating has a post purge period of 1 minute. The
post purge period may be changed if desired. The pump runs automatically for 10 seconds once every 24 hours to prevent blocking.
1.2 Operation of domestic hot water supply
The DHW system is started automatically as soon as more than 2 litres of water per minute are drawn. During delivery of hot tap water
no heat is supplied by the appliance to the central heating system.
For purposes of fast delivery of hot tap water a DHW comfort function has been installed in the controller. This function maintains the
temperature of the heat exchanger. The DHW comfort function has the following settings:
On: ( LED on) The appliance’s DHW comfort function is turned on continuously. In this mode the heat exchanger will be kept on
temperature to assure instant delivery of hot water.
Eco: ( LED on) The appliance’s DHW comfort function is an intelligent system. The appliance will adapt to the pattern of use of hot tap
water. As a result, the temperature of the heat exchanger will only be maintained in periods during which domestic hot water was drawn
on previous days.
Off: (Both LEDs off) The temperature of the heat exchanger is not maintained, as a result of which the delivery of hot tap water takes a
little time. If there is no need for rapid delivery of hot tap water, the DHW comfort function can be switched off.
2 OPERATION AND DISPLAY READ-OUT
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