3 GENERAL BOILER INFORMATION 3.1 General The Intergas Combi Compact HRE wall mounted, gas fired boiler is a closed appliance. The appliance is designed to transfer heat to the water circuit in a CH system and the DHW installation. The air supply and combustion gas flue connection is as standard prepared for a concentric 60/100 horizontal flue system. The appliance can be installed with a wall mounting jig which houses the expansion vessel (8Ltr). The appliance can also be installed using the external robo kit 8Ltr or 12Ltr.
(Both items are sold separately and are not inside the boiler packaging) The Intergas Combi Compact HRE wall mounted gas fired boiler carries the CE rating and IP44 electrical protection. The HRE 36/30 and HRE 36/40 are suitable for supplying at least 13 litres of water per minute at 35°C temperature arise. The HRE 28/24 is suitable for supplying at least 10.5 litres of water per minute and the HRE 24/18 is suitable for supplying at least 8.5 litres of water per minute. It is possible to use the appliance solely for hot water or solely for heating. The unused system does not have to be connected. The parameters have to be set accordingly.
The appliance has been set to natural gas (G20) by the manfacturer as standard. For usage of LPG (G31) the boiler can be converted by changing the gas restrictor ring. A gas conversion kit can be ordered at Intergas Heating Ltd. Note Modification of the boiler can only be done by a qualified competent person. 3.2 Boiler controller An electronic control unit, consisting of a boiler controller and separate ignition module which is placed on the gas valve , provides direct burner ignition and flame supervision along with continuous modulation of the burner’s gas supply. 3.3 Parameter list All boiler adjustments are accessible through the parameter list in the software.
3.4 Heat transfer Heat transfer to the boiler’s heating and DHW circuit is obtained via a primary, gas to water heat exchanger within a hermetically sealed combustion chamber. A modulated speed fan blows the gas/air mixture into the combustion chamber and expels the products of combustion to outside air via an associated flue system. 3.5 Central heating system An integral pump located in the boilers hydraulic circuit circulates water through the heat exchanger to the central heating circuit. During DHW demand the pump stops functioning, so all the heat is directly transferred to the integrated DHW circuit and no transfer losses occur.
In the event of reduced or interrupted water circulation in the central heating circuit, an automatic system by-pass should be fitted as far away from the boiler as possible. Note It is no longer permissible to utilise a non-thermostatic controlled radiator as a by-pass. 3.6 Room temperature control Room temperature can be controlled by the use of an external room thermostat and thermostatic radiator valves. Note Connection of the room thermostat is dependant on the operating voltage of the thermostat.
3.7 Integrated clock The boiler incorporates an integrated clock, which allows the setting of central heating periods (See the User Instructions, ‘Operation and display read-out’ for details) and the boiler’s control panel incorporates an LED display, which indicates the state of operation and fault defect codes. Intergas Heating Ltd 11