R3400 Technical data - Rendamax

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<strong>Rendamax</strong> 2.2.1 Description of principal components The unit is constructed from the following principal compo nents: Fan [24] This consists of a fan casing, a fan impeller and an electric motor. The fan sucks in combustion air and increases the air pressure. Air inlet damper [28] A specially developed air inlet damper ensures a low noise level. As an option, this can be provided with an air filter or with an air inlet opening so that the appliance can function as a room sealed appliance. Gas train [13] The principal component of the gas train is the main gas valve/proportional pressure regulator [23]. The quantity of gas is adjusted in proportion to the quantity of air being supplied. The quantity of air depends on the speed of the fan. The unit is fitted with a gas filter [11] as standard. Mixing chamber [29 + 31] This area is used for the thorough mixing of the gas and the combustion air. The unit is supplied with a main mixing cham ber [29] and a pilot mixing chamber [31]. Both are connected to the fan. Burner [9] After the gas/air mixture has been distributed over the burner with the aid of a distribution plate [8], the mixture is burned on the surface of the burner in such a way that the flame is di rected downward. The burner is air and water cooled. The water distribution components are made from cast iron and have a profile that ensures that an optimum distribution and flow are obtained. Heat exchangers [10, 12 and 17] The primary heat exchanger [10] is constructed from smooth stainless steel tubes. These transfer most of the heat energy to the system water. The secondary heat exchanger [12], which consists of laser welded stainless steel finned tubes, transfers the remaining heat from the flue gasses to the system water. All the water distribution components are constructed from cast iron and have a profile that ensures that optimum distribution and flow are obtained. The space between the burner and the secondary heat exchanger forms the combustion chamber. At the R3600 a third heat exchanger [17] is attached wich consists of one or more stainless steel fin tube(s), switched in series, in form of a spiral. It is arranged on the back of the boiler on the flue gas collection chamber. The boiler pump ensures the water flow quantity. The third heat exchanger is switched parallel to the boiler and has a flow of 5 - 10 % of the entire water flow. Water circulation pipes [15] These pipes connect the burner to the heat exchangers. Water connections These consist of a flow connection [5] and a return connection [1]. Both of these connections are provided with a filling/drain valve [6]. The flow connection is also provided with a safety valve [4], a flow switch [3] and a temperature sensor. Boiler pump [32] The boiler pump is mounted on the return connection to the unit and is directly connected electrically to the appropriate termi nals in the connection box. The capacity and the working head of the pump is sufficient to overcome both the resistance of the boiler and some system resistance. Flue gas collection chamber [19] The stainless steel flue gas collection chamber is mounted under the heat exchanger. This chamber is provided with a flue gas exhaust connection [16], a condensate drain connection [22] and an inspection opening. Doc890/3456CV02B 15
Frame [14] The frame is constructed from steel profile sections. Vibration absorption dampers are supplied separately and must be fitted after the unit has been placed in position. The casing [27] The casing consists of panels that can be removed easily without the aid of tools. The electrical section This includes the control and safety circuits for the unit. Connection box [25] The electrical power supply for the boiler, the terminals, the pump connections and the pump relay are mounted in an easily accessible connection box. The supply cables can easily be fed to the connection box via the cable duct inside the boiler [21]. 2.3 Boiler control The principle employed for the Boiler Management Unit is as follows: The boiler begins operating on receipt of a heating demand. This heating demand is generated either: A. If the measured supply temperature is lower than the desired temperature. B. As a result of “manual operation” mode having been se lected (W1 or W2), C. in standby mode, when the water temperature falls below the frost protection temperature. After the unit has started up, the PID controller sends a signal to the frequency converter. This converter controls the speed of the fan. Depending on the quantity of air moved by the fan, the proportional pressure regulator ensures that the corresponding quantity of gas is added. In this way the boiler capacity is continually adjusted and the boiler can accurately follow the heating demand. If the boiler is operating at minimum capacity and the temperature of the supply water rises above the desired value, the unit will be shut down. As soon as the temperature of the supply water falls below the set value, the boiler will be re-started. 2.4 Safety aspects The unit contains the following safety components: - Flame protection on pilot and main burner (1x re-start) - Water flow protection - Maximum water temperature protection - Gas valve test - Fan protection - Boiler pump motor over-heating protection. If one of these components operates, this results in a lockout fault. Lockout faults can only be cancelled by resetting the unit. The unit is fitted with a safety valve that opens at 3 bar.
Page 1 and 2: Rendamax Technical documentation R3
Page 3 and 4: Rendamax Contents R3400 Technical d
Page 5 and 6: Rendamax R3400 Technical data Type
Page 7 and 8: Rendamax Type R3401 R3402 R3403 R34
Page 9 and 10: Rendamax 1.5 General restrictions T
Page 11: Rendamax 2.2 Main components 1 Retu
Page 15 and 16: Rendamax Modification Modifications
Page 17 and 18: Rendamax Lifting The figure below s
Page 19 and 20: Rendamax w R3600 only 3 rd Heat exc
Page 21 and 22: Rendamax 5 Installation 5.1 Regulat
Page 23 and 24: Rendamax The gas connection is made
Page 25 and 26: Rendamax BME (option) This is a wea
Page 27 and 28: Rendamax w In order to limit the lo
Page 29 and 30: Rendamax Fig. 21 Distance between a
Page 31 and 32: Rendamax chimney suspension draugt
Page 33 and 34: Rendamax Type Diameter in mm ζ=1 E
Page 35 and 36: Rendamax Type ∆T 20 K Pump data N
Page 37 and 38: Rendamax Type UPS 65-120F R3401 - R
Page 39 and 40: Rendamax In order to guarantee a we
Page 41 and 42: Rendamax When two appliances are sw
Page 43 and 44: Rendamax Operating mode (cover clos
Page 45 and 46: Rendamax 6.5 Start-up 1 Open the ga
Page 47 and 48: Rendamax Measure the gas pressure a
Page 49 and 50: Rendamax 8.5 Cleaning the filter/sc
Page 51: Rendamax meg/l °dH °f °e mg CaCO

R3400 Technical data - Rendamax

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