However, in extremely cold weather, the HVAC unit may not be able to maintain the set temperature. In most temperatures, an under-voltage condition will not be noticed. It is not uncommon for service voltage to be less than 240 volts. As the service voltage drops, so will the heat output from the unit (cooling is not affected). The capacity of electric resistance heating is rated at 240 volts. It is critical to verify the incoming electrical service voltage to the modular building. Generally, both heating and cooling capacities are slightly in excess of what is necessary to meet winter and summer temperatures. These temperatures are established by the various state building, mechanical, and/or energy codes. Heating systems are designed to maintain indoor temperatures during the AVERAGE coldest and warmest periods. Our modular buildings are equipped with electric heating systems. During temperate periods, the fan switch should be set to “on” to enable fresh air to enter. Fresh air is only brought into the building when the indoor fan is operating. In the “on” setting, the fan will run continuously. In the Auto setting, the indoor fan will run only when the thermostat calls for heating or cooling. The thermostat has a switch for indoor fan operation, labeled “auto” and “on”. If the thermostat is not programmable, manually setting the temperature to 55 degrees (heating season) or 85 degrees (cooling season) when the building is not to be occupied (nights and weekends) will save energy and money. This WILL NOT heat or cool the space more quickly but will result in increased operating costs. Do not use the thermostat as an on/off switch or set the thermostat higher or lower than the desired temperature. The Bard unit is equipped with a simple Manual Changeover type thermostat (the thermostat must be switched manually between heating & cooling). The amount that each damper is opened may vary between heating and cooling operations and can be easily adjusted to ensure occupants are comfortable. One or more ceiling-mounted supply diffusers distribute air to each occupied room or area and are equipped with dampers that allow adjustment of air volume. SUPPLY AIR DIFFUSERS/DAMPERS:Ĭonditioned air is supplied via a ceiling duct. During the winter months, close the outside damper to a degree that will ensure comfort for the occupants. ![]() We do not recommend setting the outside air intake to a fully closed position. However, a certain amount of fresh air is necessary to maintain indoor air quality. If the outside air intake device brings too much air into the trailer, the cost will be increased. Adjust the damper to the minimum opening that provides sufficient fresh air the more people in the building, the greater the damper opening should be. The commercial room devices open when the unit is operating, and automatically close when the unit shuts down. Both of these devices serve to supply fresh air to the interior of the structure, and may be adjusted for efficiency and economy. ![]() OUTSIDE AIR:Ī Bard unit will have either a manual outside air intake damper (standard) or a “commercial room ventilator” (if ordered). Replacement filters are available from any hardware store or heating/cooling equipment supplier. A dirty filter will degrade the performance of your heating/cooling system, and increase your bills. ![]() Check the condition of your filter and replace it annually, or more often if the HVAC equipment is operating in a dusty environment, (in which case, the 1-inch filter can be replaced with a 2-inch filter.) Please note: a 2-inch filter will cause some loss in airflow and should be checked monthly. FILTERS:īard units are provided with one 1-inch disposable filter (the higher capacity units have two), located behind the “filter access door.” This is the middle panel on the front of the unit. Such things as filter size and quantity will vary with unit size. Identify the model of the HVAC unit installed on your structure.
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