AIR HEATER TYPE DXE
24Pages

INSTALLATION MANUAL AIR HEATER TYPE DXE C€

1.1 Symbols used in this manual 3 2.4 Children and vulnerable users 4 6.2 Minimum firing time 12 6.5 Flue passage check 12 8.1 Adjusting the burner settings 14 8.2 Converting to another gas type 14 9.1 Volatile lock outs 16 10.3 Maintenance of the burner unit 19 10.4 Extensive maintenance in poultry sheds 20 11 Electrical wiring diagram 21 12 Exploded view and spare parts 22

1 Introduction This manual is intended for the gas, electrical and mechanical installer. This document gives instructions on how to use and maintain the air heater. It is most important to follow the instructions in this document for safe operation of this air heater. It is important to read this document before starting the installation process. Store this document close to the air heater for quick reference. 1.1 Symbols used in this manual DANGER! Indicates a dangerous situation that would lead to death or severe injury. WARNING! Indicates a potentially dangerous situation that could lead...

2 Safety instructions Always follow the safety instructions in this chapter when installing, using or performing maintenance on this air heater: Frequent maintenance and cleaning of the air heater is necessary to ensure safe and proper operation. Failure to do so could lead to damage to the heater or its surroundings and void the warranty. CAUTION! This air heater must be installed and maintained by an authorized, qualified and competent installer, using calibrated equipment. CAUTION! Air heaters installed in a dusty and/or wet environment must be maintained and cleaned more frequently....

4 Installation 4.1 Preparation Before installation, please use the data badge to check: • if the heater is in accordance with the order; • if the heater is suitable for the local present provisions (gas type, gas pressure, electrical supply etc.) • Make sure the wall can support the air heater. • Ensure sufficient clearance distance for the flue system. • Install the heater horizontally without an inclination (figure 2). Before leaving the factory, the air heater has been tested for safety and has been set to the operating settings. It has been configured for the type of gas that is stated...

4.4 Electrical connection The electrical installation must comply with local and national requirements as well as IEE regulations. Power supply The air heater requires an earthed power supply of 230 V/ AC. A supply of 400 V/AC + Neutral is optional. The control circuit is a two wire low voltage bus communication. 230 Vac In all cases, the communication between the heater and the thermostat is based on a two wire, low-voltage connection. (see the electrical wiring diagram in §11). Follow these instructions to prevent malfunction of the installation and damage to the thermostat or air heater:...

Figure 4 - Bus communication connection S1 Figure 5 - Positions of the S1 and J14 switches Figure 6 - Location of the S1 and J14 switches Figure 7 - Connection of multiple air heaters to a modulating room thermostat Each air heater needs an unique number to be recognised by the room thermostat. This number can be set with the J14 switch on the control unit of each air heater: 1. Set the S1 and J14 switches on the control unit as follows (figure 8): a. Set the S1 switch of the first air heater to 1. b. Set the S1 switch of the other air heaters to 2. c. Set the J14 switch of the first air...

4.5.4 ON/OFF thermostat installation To connect the air heater to an ON/OFF room thermostat, do the following: • Connect the two thermostat wires to terminal 6 and 7 (see figure 9 or the electrical wiring diagram in §11). This is a 24 V connection for the thermostat signal. Figure 9 - ON/OFF thermostat connection NOTICE Never combine these connections with the terminals 6 and 7 of other air heaters. NOTICE Always use separate relays for each air heater. NOTICE Do not connect an external power source to these terminals. These terminals need a dry contact. 5 Flue systems The air heater is...

6.3 Summer ventilation The air heater's display shows the current status of the burner cycle (figure 10). The fan can be set to run in the summer. Follow the instructions in the user manual of the special Room thermostat. 6.4 Overheating protection The air heater's heat exchanger and flue system are both protected from excessive temperatures. 6.4.1 Heat exchanger An NTC sensor is located near (or on) the heat exchanger. This sensor monitors the heat exchanger temperature. If the heat exchanger becomes too hot, this sensor will cause the heating process to stop. Depending on the temperature,...

7 Commissioning the air heater 7.1 Adjusting the settings Prior to packaging, the safety and functioning of each air heater is checked in detail. It is also set to the right combustion efficiency. To commission the air heater via the room thermostat, do the following: • Put the thermostat in the highest position. The start sequence is always the same. In general, the heater does not need to be adjusted after installation. It is only necessary to perform a functional check and to obtain a flue gas analysis and record it for later reference. The air heater will burn for the minimal firing...

8 Combustion settings In principle, it is not necessary to adjust the control shortly after commissioning the air heater. When the control does have to be adjusted after a period of use or after installing a new heater, this must be done by a qualified person using calibrated equipment. DANGER! A poor adjustment can lead to overheating of the air heater and/or production of toxic carbon monoxide. 8.1 Adjusting the burner settings The flow of gas to the burner is controlled with a gas valve. The valve must be set to a high and a low burner pressure. To adjust the burner pressures, do the...

NOTICE The injectors have a stamp that corresponds to the diameter of the injector. For example, 130 means 1.30mm and 210 means 2.10mm. 9. Apply the sealing paste from the conversion kit on the threads of the injectors. CAUTION! Avoid paste from getting into the injectors. 10. Insert the new gas injectors. 11. Reattach the burner tube to the burner unit. 12. Mount the burner unit back into the air heater and reconnect all cables. 13. Expel air from the piping and check the gas valve and supply line for leaks. 14. Change the labels on the air heater with ones that have the correct values for...