BMA Direct Gas-Fired Makeup Air Units

1 EXCELLENCE THROUGH PROVEN PERFORMANCEBMAD irect Gas-Fired Makeup Air UnitsINDUSTRIAL COMMERCIAL EQUIPMENT MANUFACTURING C INDUSTRIAL COMMERCIAL EQUIPMENT MANUFACTURING founded as Bullocks Manufacturing during the post-war residentialhousing boom, Manufacturing was recognized for innovation andexcellence early in our history. After the company established a reputation fordesigning, manufacturing and installing natural gas conversion burners for oiland coal- fired furnaces, founder Don Bullocks returned from an ASHRAE tradeshow with a natural gas line burner. Inspired, he set out to manufacture the firstdirect- fired Makeup air unit in his home country of , the natural gas revolution continues with Manufacturing at theforefront of the commercial Direct - fired industry. Don had the vision long beforemany others by designing a product that has outlived his legend. Our BMAS eries is named for him (Bullocks Makeup Air). This forward thinking has carriedon through such advanced products as the HTDM, the gas valve technologyavailable on the BMA, and the industrial-quality GIDM product of our products have withstood the test of time.

2 Many new products are onthe horizon to meet the ever-increasing concern over energy costs, consumptionand impact on our environment. We are building on our heritage to bringexceptional Gas-Fired products to is committed to success the success of our customers and ouremployees. To us, success is driven by loyalty that comes from service, qualityand innovation. With our vast experience in the HVAC industry, we continue tolisten to and understand the needs of our customers. And we trust we will beable to serve you well into the THROUGHPROVEN PERFORMANCET able of ContentsWHY Direct - fired Makeup AIR? / SELECTION GUIDE FOR Direct - fired Makeup AIR .. 1 STANDARD FEATURES / OPTIONAL FEATURES / ADDITIONAL OPTIONS .. 2 BMA SERIES STANDARD TEMPERATURE CONTROL OPTIONS / MISCELLANEOUS CONTROL OPTIONS .. 3 BMA Direct - fired SERIES PERFORMANCE 4 FILTER SPECIFICATIONS FOR V-BANK SECTION AND INLET 6 WEIGHT SPECIFICATIONS .. 7 BMA 109/136 SERIES INDOOR HORIZONTAL SINGLE BLOWER C/W OPTIONAL V-BANK FILTER SECTION.

3 8 BMA 215/236 SERIES INDOOR HORIZONTAL DUAL BLOWER C/W V-BANK 9 BMA 109/136 SERIES OUTDOOR HORIZONTAL SINGLE BLOWER C/W OPTIONAL HOOD/FILTER 10 BMA 215/236 SERIES OUTDOOR HORIZONTAL DUAL BLOWER C/W OPTIONAL LOUVERED INLET HOOD .. 11 BMA 109/136 SERIES INDOOR HORIZONTAL SINGLE BLOWER C/W V-BANK FILTER AND MIX BOX .. 12 BMA 215/236 SERIES INDOOR HORIZONTAL DUAL BLOWER C/W V-BANK FILTER AND MIX BOX .. 13 BMA 109/136 SERIES OUTDOOR HORIZONTAL SINGLE BLOWER C/W V-BANK FILTER AND MIX BOX .. 14 BMA 215/236 SERIES OUTDOOR HORIZONTAL DUAL BLOWER C/W V-BANK FILTER AND MIX BOX .. 15 BMA 112/136 SERIES OUTDOOR VERTICAL CONFIG. SINGLE BLOWER C/W V-BANK FILTER SECTION AND STAND .. 16 BMA 215/236 SERIES OUTDOOR VERTICAL CONFIG. DUAL BLOWER C/W V-BANK FILTER SECTION AND STAND .. 17 BMA 112/136 SERIES INDOOR VERTICAL UPFLOW CONFIG. SINGLE BLOWER C/W V-BANKFILTER SECTION AND STAND .. 18 BMA 215/236 SERIES INDOOR VERTICAL UPFLOW CONFIG.

4 DUAL BLOWER C/W V-BANKFILTER AND 80/20 MIX 19 BMA 112/136 SERIES OUTDOOR VERTICAL UPFLOW CONFIG. SINGLE BLOWER C/W V-BANKFILTER SECTION AND STAND .. 20 BMA 215/236 SERIES INDOOR VERTICAL UPFLOW CONFIG. DUAL BLOWER C/W V-BANKFILTER AND 80/20 MIX 21 BMA 109/136 SERIES INDOOR HORIZONTAL AND BOTTOM DISCHARGE COIL PLENUMS SINGLE BLOWER .. 22 BMA 215-236 SERIES INDOOR HORIZONTAL AND BOTTOM DISCHARGE COIL PLENUMS DUAL BLOWER .. 23 BMA 109/136 SERIES OUTDOOR HORIZONTAL AND BOTTOM DISCHARGE COIL PLENUMS SINGLE BLOWER .. 24 BMA 215-236 SERIES OUTDOOR HORIZONTAL AND BOTTOM DISCHARGE COIL PLENUMS DUAL BLOWER .. 25 How To- Determine whether the unit will be for heating and cooling, humidifying,dehumidifying, or any combination of the Determine the maximum air volume requirement. This is generally 10%greater than the maximum air volume of the exhaust system for the will allow the room to be positively pressurized. However, in somemakeup systems this may be reversed to keep the space negativelypressurized, keeping odors, toxins, etc.

5 Confined to the conditioned Once this is known, refer to the BMA Series Performance Specifications onpages 4 and 5 to choose the model that can deliver this The corresponding Brake Horse Power (BHP) can then be taken from theBMA Performance Specification Chart, given the external static pressure(ESP" WC). Note: Add the necessary accessory pressure drop(s) found onpage 6, to the ESP. Given the blower HP and line voltage, refer to page 6,to determine the Running Motor Amperage, Inrush Motor Amperage andFull Load Amps (FLA).- Knowing the unit Model Number and MBH capacity, the corresponding gasconnection size can be taken from the BMA Series Specification Table. - Given the entering and leaving dry bulb temperatures or temperature rise,the equation below can also be used to calculate the required capacity = (CFM x C x (LAT-EAT))/1000 MBH capacity: BTUH/1000 (British Thermal Units per hour).CFM: Cubic Feet per Minute of : Gas constant of based on an air density at 75 deg.

6 FEAT: Entering Air dry bulb Temperature ( deg. F)LAT: Leaving Air dry bulb Temperature (deg. F)- Specify the unit configuration by referring to the unit Configurationdrawing. See page room is exhausting 8000 CFM. The desired room temperature is 70 deg. winter design condition for the area is -10 deg. F. The unit chosen is to bean outdoor Direct - fired unit whose discharge is downwards. The ESP is " The line voltage to the unit is 600/3/60. Gas connection is on the righthand :1. The supply air capacity Which unit is capable of delivering the required supply air volume, while notexceeding a BHP of : Because it is an outdoor unit , you will require an inlet louver or hoodand filter section. For this example, we will use an inlet hood with Running Motor The MBH capacity and corresponding gas connection size unit Since the exhaust air volume is 8000 CFM, the supply air capacity should bethe same if no pressurization requirements were specified.

7 Therefore, thesupply air capacity is 8000 Referring to the BMA Performance Specification Table, the BMA 118, BMA120, and BMA 215 are all capable of delivering the required 8000 CFM ofsupply air. The unit must have a maximum of BHP when the staticpressures of the unit and ESP are added together and applied to the : ESP= " (Given)Inlet hood w/filters = " (Page 6) + TSPUse " on the chart to be corresponding BHPs at " .. BHP (Page 4)BMA120 .. BHP (Page 4)BMA215 .. BHP (Page 4)The Units that can be used are the BMA120 and the 5 HP motor will be required for either of the Units chosen. 3. The Running Motor Amperage for a 5 HP motor at 600/3/60 is amps(Page 6).4. The MBH input required for an EAT of -10 deg. F and a LAT of 70 deg. F(80 deg. F rise) is 760 MBH. MBH = (CFM x (LAT - EAT)) / 1000 MBH = (8000 x (70-(-10)))/1000= 760 MBHThe corresponding gas connection size required is 1 The unit configuration is HRB (Page 34) for a Horizontal Right-hand unit witha bottom Direct - fired Makeup Air?

8 Inexpensive to OperateDirect gas firing is 100% effective. In the majority of Gas-Fired appliances that utilize heat exchanging devices, approximately 20% and usually more of the thermal content of the fuel is lost in vented flue gases as well as up to an additional 10-15% lost in piping or ducting. With Direct firing, 100% ofthe fuel s energy is absorbed by the Makeup to Install and MaintainOnly a gas line to the burner and an electrical hook-up to the air blower motor and controls are required. The burner does not require an air gaspremixer. Consequently, installation and maintenance are considerably simpler and more SafeCombustion is electronically supervised to provide shut down in the event of flame failure. An adequate supply of circulating air is ensured by an airvelocity interlock switch or the burner is automatically shut down. Excessive temperatures are guarded against by a manual reset high-limit burner produces no harmful concentrations of carbon monoxide in the air stream.

9 The nozzle design eliminates mechanical devices for mixing Air ApplicationA Direct - fired Makeup air unit is a combination of elements designed to condition fresh air introduced into the unit . This air is then blown into theoccupied or unoccupied space replacing the air that is exhausted through powered exhaust air Units may, therefore, be required to heat, ventilate, cool, humidify, dehumidify, pressurize, and filter the air blown into the space (supply air).The supply airflow will be either fixed or variable, which can respond directly to different exhaust flow rates to achieve room pressurization of a space eliminates:- building perimeters being cold in the winter due to high infiltration- drafts at exterior doors- doors from being hard to open from the outside- uneven temperature conditions in the building space- gravity-vented gas appliances from back venting1 Selection Guide for Direct - fired Makeup AirSelection for 80/20 Units (Available in US only)The BMA series unit can be used as a combination Makeup air and heating unit .

10 A minimum of 20% fresh air must be provided at all times and thebalance (80%) is a combination of fresh and return air. With the dampers fixed for 80% recirculation, the BMA series unit functions as a space Mix Box(Available in US only)Allows the recirculation of air to occur. This willprovide a cost effective way of space V-bank filter rack WeatherhousingControl and manifold enclosureInlet HoodsExpanded metal screen inlet with optional 2" Hood & Filter RackCombination Inlet hood with filter rack for 2" thickfilters available on models BMA SectionV-bank filter section with side access suitable for2" access doors completely sealed withgasketing for BMA 125 & Filter SectionLocated on the discharge side of burner. Filters2" thick permanent, pleated and throwaway filters;various efficiency bag filters and HEPA filterscomplete with filter gauge and/or indicating Inlet & Discharge DamperParallel blade damper with a two-position springreturn actuator and end CurbPrefabricated galvanized roof curb 16" or 24" high;full perimeter available on most Units .