356214-XIM-A-0108

10.If the blower motor runs with the fan switch in the “ON” position but does not run shortly after the fur- nace has ignited when the fan switch is in the “AUTO” position, check the room thermostat for contact between R and G during “W1” calls.

On calls for heating, the supply air blower operates but the draft motor does not (the room thermostat fan switch is in the “AUTO” position).

1.The draft motor has inherent protection. If the motor shell is hot to the touch, wait for the internal overload to reset.

2.If the motor shell is cold with the room thermostat calling for heat, check for line voltage at the motor's Mate-N-Lok connector attached to the evaporator partition. If line voltage is present, replace the draft motor.

3.If line voltage is not present, check for line voltage at the heat relay (RW1) contacts in the main con- trol box and check to see if the (RW1) is pulled in.

4.If the (RW1) relay is pulled in, check for a loose line voltage connection.

5.If the (RW1) relay is not pulled in, check for 24 volts at the (RW1) coil. If 24 volts is present, replace the (RW1) relay. If 24 volts is not present, check for a loose 24 volt connection back to the relay board and check the connections from the room thermo- stat to the relay board. If all connections are cor- rect, replace the relay board.

The draft motor runs but the furnace does not light and the sparker does not spark.

1.The ignition control (IC1, IC2) may be locked out due to either a flame roll out or 100% shut off. These safety features are described above. If lock- out has occurred, 24V must be removed from the ignition controls. This is done at the unit or by resetting the room thermostat. After resetting 24V, check for proper furnace operation. If lock-out con- tinues to occur, locate the source of the problem and correct.

2.Check all 24 volt connections from the relay board to and in the gas heat section. Check low voltage connections to the (ETD) located in the control box.

3.If the furnace is hot, it may be out on an over-tem- perature condition, wait for limit reset.

4.If the furnace is cold, check for 24 volts at wire 241 attached to the electrical time delay (ETD) located in the main control box. If 24 volts is not found, replace the ETD.

5.24 volts is found at wire 241, remove the wires attached to the (TDR) and with a VOM, check for continuity across contacts 1 and 2. If none is found, the (TDR) is open and must be replaced. If there is continuity, re-attach the wires.With the draft motor running, check for 24 volts at terminal 4 of (RW1-2) and (RW2-1). If 24 volts is not present, the centrifu- gal switch (CS) has not closed or has gone bad. Check the line voltage to the unit - if it is correct, replace the draft motor. If line voltage is low, call the power company.

6.Check for 24V at terminal 2 of (RW1-2 and RW2- 1). If 24V is not present, check for 24V at (RW1 and RW2) relay coils. If these relays are pulled in, then check for a loose connection at terminal 2 and terminal 4 of each relay. If no problem is found, then replace (RW1 and/or RW2) as required.

7.If 24 volts is present at the ignitor controls, check all control wiring at the ignitor controls and the high tension wire to the ignitors. Check that the ground wires from the ignitor controls, the gas valves and pilot burners are all intact and making good electri- cal connection. Check to make sure that the ceramic insulator on the pilot ignitors or sensors is not broken or cracked, if all are intact, replace the ignition control IC1 or IC2.

The draft motor runs and the ignitor sparks at the pilot burner but the pilot does not ignite and a gas odor is not detected at the draft motor outlet.

1.Check to make sure gas is being supplied to the unit. Make sure that the gas pressure to the unit is within the proper limits as described in the “POST START CHECK LIST” page 43 and that the pilot adjust screw is allowing some flow of gas as described in “PILOT CHECKOUT” page 44.

2.Check all wiring between the ignitor control and the gas valve. Check to make sure the ground connec- tions are intact.

3.If the wiring is intact, check for 24 volts across ter- minals “PV” and “COMMON” on the ignitor control. If 24 volts is not present, replace the ignitor control.

Johnson Controls Unitary Products

51

Page 50 Page 52
Page 51
Image 51
Sunlife Enterprises DM300, DM240, DM180 installation manual XIM-A-0108
Page 50 Page 52

DM300, DM240, DM180 specifications

Sunlife Enterprises has made significant strides in the competitive market of digital management tools with their innovative lineup of products: the DM240, DM300, and DM180. Each of these devices has been engineered to cater to specific operational needs while sharing a common foundation of advanced technology, versatility, and user-centric design.

The DM240 is an entry-level model that caters to small businesses looking for an efficient digital management solution without the hefty price tag. With a compact design and intuitive user interface, the DM240 allows for seamless integration into various work environments. Key features include a high-resolution touchscreen display, which facilitates easy navigation and quick access to essential functions. The device supports wireless connectivity options, ensuring users can manage tasks from anywhere within their operating environment. The energy-efficient design of the DM240 also promotes sustainability without compromising performance.

Moving up the line, the DM300 offers enhanced capabilities for medium-sized enterprises. This model is powered by advanced processing technology, allowing for faster data handling and superior multitasking. The DM300 features expanded memory and storage options, ensuring that users can manage larger datasets effortlessly. Additionally, with built-in advanced security features like biometric authentication and encrypted data storage, businesses can ensure that sensitive information remains protected. The intuitive software interface of the DM300 is designed for ease of use while providing advanced analytics tools to enable users to make data-driven decisions.

At the top of the range is the DM180, a sophisticated solution tailored to large organizations with complex digital management needs. The DM180 showcases a state-of-the-art design with high-performance computing capabilities. It features an expansive multi-touch display, allowing multiple users to interact simultaneously, facilitating collaboration and teamwork. The DM180 is equipped with cloud integration options, promoting real-time data access and sharing among teams, regardless of location. Its scalability ensures that businesses can adapt the system to accommodate growth without compromising functionality. Moreover, it offers comprehensive reporting and analytics tools, empowering organizations to gain valuable insights into their operations.

In summary, Sunlife Enterprises’ DM240, DM300, and DM180 models stand out for their unique features designed to meet the evolving needs of businesses. With a focus on user experience, performance, and security, these devices are poised to help organizations enhance productivity and drive innovation in the digital management landscape.
Top Page Image Contents