should be checked to ensure that all fan speeds are operating properly.

OPERATING INSTRUCTIONS

Before Lighting

Open all supply and return air registers and grilles.

Open all valves in oil pipes.

Turn on electric power supply

To Light Unit

Set the thermostat above room temperature to call for heat. The burner should start. NOTE: It may be necessary to press the RESET button on the primary combustion control relay.

There will be a fan on time delay before the circulating fan is energized. The Honeywell ST9103 has a fixed fan delay on time of 30 seconds after the burner ignites. The United Technologies 1158- 120 has an adjustable fan on time that is set by selecting the dipswitch combination displayed in Chart 1. This fan on delay can be set at 30, 60, 90 or 120 seconds.

Set the thermostat below room temperature. The oil burner should stop.

The air circulation blower will continue to run until the time off setting selected on the electronic fan timer control times out. The Honeywell ST9103 has an adjustable fan off time of 60, 90, 120 and 150 seconds that is set by selecting a dipswitch combination on the control

board. Similarly the United Technologies 1158-120has an adjustable fan off time of 2, 3, 4 or 6 minutes The fan timer control adjustments may be altered if the air at the room registers is uncomfortably high upon blower start up or shutdown.

The necessary adjustments to the fan control settings should be determined by measuring the temperature of the air in the supply air take-off, or within the first few inches of the supply air trunk. The side mid point of the transition is usually ideal, providing that the thermometer probe is beyond the "line of sight" wherein false readings from radiant heat could be observed. The system temperature rise, the difference in temperature between the supply air and return air, should be within the indicated range on the appliance rating plate.

To check the operation of the limit switch, shut off power to the furnace. Temporarily remove the neutral wire from the direct drive blower motor. Restore the electrical power to the

furnace and set the thermostat above room temperature. After three or four minutes of burner operation, the limit control should turn the burner off. When the limit function test is complete, shut off electrical power to the furnace, replace the neutral wire to the blower fan motor, and then restore power. The blower fan will start up immediately. Once the temperature has dropped and the limit control has reset, the fan will operate until the fan off time is achieved. The oil burner will then resume operation and continue until the thermostat is satisfied. Restore the thermostat setting to a comfortable temperature.

To Shut Down Unit

Set the thermostat to the lowest possible setting.

Set the manual switch (if installed) in the Electrical Power Supply Line to "OFF".

NOTE: If the furnace is to be shut down for an extended period of time, close the oil supply valve to the oil burner.

DO NOT ATTEMPT TO START THE BURNER WHEN EXCESS OIL HAS

ACCUMULATED, WHEN THE FURNACE IS FULL OF VAPOUR, OR WHEN THE COMBUSTION CHAMBER IS VERY HOT. NEVER BURN GARBAGE OR PAPER IN THE FURNACE, AND NEVER LEAVE PAPER OR RAGS AROUND THE UNIT.

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30318 R4 9/9/2005

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Field Controls WML-C, MPL-B manual Operating Instructions, Before Lighting, To Light Unit, To Shut Down Unit
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MPL-B, WML-C specifications

Field Controls, a leader in the HVAC industry, offers innovative solutions for air quality and equipment efficiency. Among their range of products, the WML-C and MPL-B series stand out for their remarkable features and advanced technologies, catering to the unique needs of both residential and commercial applications.

The WML-C series is designed for optimal ventilation and air quality management. It integrates seamlessly with existing HVAC systems, providing crucial airflow control and ensuring that indoor environments maintain optimal levels of fresh air. One of its key features is the variable speed fan technology, which adjusts according to the desired airflow rate, thereby enhancing energy efficiency. This not only reduces operational costs but also contributes to a more sustainable environment.

The MPL-B series, on the other hand, focuses on purification and filtration. Equipped with advanced media filters, it effectively captures airborne particles, allergens, and pollutants, which is essential for maintaining clean indoor air. The MPL-B series utilizes a multi-stage filtration system that includes HEPA filters, ensuring that the air circulated within spaces meets high standards for cleanliness and safety.

Both the WML-C and MPL-B models utilize smart technology for enhanced control and monitoring. With integrated sensors, users can receive real-time data on air quality, humidity levels, and system performance, allowing for proactive management and maintenance. Additionally, they are compatible with various building management systems, enabling integration into larger infrastructure for comprehensive environmental control.

Durability and reliability are paramount in the design of these units. Built from high-quality materials, both the WML-C and MPL-B are engineered to withstand rigorous usage and varying environmental conditions. Their compact designs allow for flexible installation options, making them suitable for a wide range of settings.

In summary, Field Controls’ WML-C and MPL-B series offer cutting-edge solutions for air quality and HVAC efficiency. With innovative features such as variable speed technology, multi-stage filtration, and smart monitoring capabilities, these systems are ideal for enhancing indoor environments while maintaining energy efficiency and sustainability. They not only meet but exceed the expectations of modern HVAC requirements, making them a valuable investment for any property owner.
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