High Efficiency Modulating with CFM Motor (RHMV) Efficiencies up to 20.5 SEER Front or Bottom Return - with X-13 (ECM) Motor (RF1T) Efficiencies up to 16 SEERCompact Unit Design (36" Tall) Constant torque (ECM) single-stage airflow All aluminum indoor coil Hydronic Air Handler - Powered by Tankless Technology (RW1T) Integrated Heating and Water Heating Hydronic heating coilConstant Toque motor High Efficiency - X-13 Motor - 35" (ECM) Cabinet Height (RBHP) Efficiencies up to 16 SEERConstant Torque single stage airflow High Efficiency - ECM Motor (RH2V) Efficiencies up to 18 SEER All aluminum indoor coil High Efficiency - Two-Stage ECM Motor (RH2T) Efficiencies up to 20 SEEREcoNet enabled Constant torque two-stage airflow All aluminium indoor coil High Efficiency - ECM Motor (RH1V) Standard Efficiency - PSC Motor (RH1P) High Efficiency Constant Torque (ECM) Motor (RH1T) Efficiencies up to 16 SEER Constant torque (ECM) single-stage air flow

All aluminum indoor coil Front or Bottom Return - Slab Coil with PSC Motor (RHAL) Efficiencies up to 15 SEERFront or Bottom Return Front or Bottom Return - with PSC Motor (RF1P) Front or Bottom Return - Slab Coil with X-13 Motor (RHBL) Efficiencies up to 16 SEERFront or Bottom ReturnX13 (ECM) motor Hydronic Air Handler - Powered by Tankless Technology (RW1P)EBD Model - 100% Fresh Air Application LU Model - 100% Fresh Air Application SBD Model - 100% Fresh Air Application SBDR Model - Up to 80% Return Air Capacity SBDF Model -Duct Furnace EBD Direct Fired Makeup Unit In a direct fired make-up air unit, the air that is to be heated is passed directly over an open flame. No heat exchanger is involved. This design results in an extremely efficient system that achieves 100% combustion efficiency and a 92% overall thermal efficiency (with 8% of the total heat lost in the latent heat of water formed in combustion). The combustion is so complete that any remaining combustion products are well within code prescribed safety limits.

Because of these benefits, direct fired units are ideal for make-up air or heating and ventilating applications. EBD Series Make-up Air Unit Fuels: Natural or LP Gas Mounting: Floor or Suspended, Horizontal Location: Indoor or Outdoor Service Manual: ISSB-1 SERVICE MANUAL SBD Series Make-up Air Unit Mounting: Floor or Suspended, Vertical/Horizontal Service Manual: ISSB-1 SERVICE MANUAL .pdf Configurations: 100% Fresh Air, VAV (Variable Air Volume), 80/20, 50/50 Cooling: DX or CW (Chill Water) Coil Sections Available Note: Condensing Unit Packages available for split DX systems. LU Series Make-up Air Unit Service Manual: ISSB-1 Service Manual ).pdfEXHAUSTO Page not found, sorry  The page you requested could not be found. Your air handler is an essential part of your "split" heating and cooling system. It is the indoor portion that delivers the cooled air in the summer and heated air in the winter — quietly and economically.

You'll find a Daikin brand air handler that's a perfect complement to any heat pump system. No matter which unit you install, the Daikin brand offers what we believe to be some of the best warranties in the heating and cooling industry. Draw-thru centrifugal blower is belt-driven for quiet, efficient operationUpflow and horizontal installationsAHRI certified; rv central ac units Apply for an accountwater furnace ac unit Apply to become a customerbest coastal ac units Become a customer and take advantage of our wide range of ventilation products. Apply to be a customer You are here: Systemair - UK Holland Heating Air Handling Units Full range of Bespoke AHUs available through Systemair We are delighted to annouce that Holland Heating Air Handling Units are now available through Systemair UK. 

The HH Flex range covers bespoke AHUs with duties up to 34m3./s inc Side by Side units HTM Hospital Spec units Holland Heating became part of the Systemair group in 2012, for selections of more information please email info@systemair.co.uk Community Engineering Services, PLLC A product liability claimant retained Dan Robles to investigate the root cause of an air handler failure.  The failure actuated the smoke alarm system and the affected rooms sustained some smoke related damage.  No fire was recorded but extensive damage was evident in the air handler unit indicating a clear danger to occupants was present. Initially, warm air was reported warm air entering the occupied area, but no fan pressure was evident.  The circuit breakers tripped and were reset by the occupant.  Instead of the circuit breakers actuating a second time, the space filled with smoke. Upon interviewing occupant and after removal and inspection of the unit, the following conditions were found:

It is unacceptable that such a meltdown should occur allowing the system to become damaged to the extent shown in the following analysis.  The exterior of the unit could have easily ignited any combustible material in the vicinity.  However, The system did not in fact support flame despite possible repeated resetting of the circuit breakers. It is more likely than not that the sequence of events leading to this condition occurred as a result of a fan mounting failure.  Upon inspection, the squirrel fan was lodged in the housing rendering he motor stalled in place.  One of the three motor mounts was broken in what appears to be a classic fatigue failure in the spring steel bracket.  Since there were only three mounts (instead of a more secure 4 mounts) the fan easily fell off center.  Further, where one would expect to see vibration isolating materials such as rubber pad or felt washers, there was a clear metal to metal transmission of vibration to the air handler housing. 

Any number of harmonic conditions could have lead to the pre-mature failure of the motor mount.  As such, it is more likely than not the initial cause for the eventual destruction of the unit. Broken Motor Mounts: One of three motor mounts broken at 45 degrees relative to the mounting surfaces.  Motor canted inward to housing.  Squirrel cage lodged in housing. Note absence of vibration isolating in left hand photograph. A failed motor mount caused the squirrel fan to fail.  No noise of a rubbing fan was evident at anytime.   At the orientation of the installation, the fan blade fixed to the siding such that no motion was possible. Spring steel bracket likely suffered a premature fatigue failure due to manufacturing or heat treat process failure.  No damping devices were installed between the bracket and the housing.  At 1200 RPM, for example, may experience up to 1.7 million reciprocating cycles per day of operation if not isolated. Three brackets instead of four created a condition of more catastrophic failure. 

Four brackets would have provided aural notification of imminent system failure by likely causing the fan to chattering loudly. Wiring Diagram (burned on edges) for heater insert show relationship of high temperature limit switches, fan relay, heating elements, circuit breakers, and thermostat. Wiring Diagram indicated that three hi-temperature limit switches should turn the unit off in the event of an over-heat condition.  The insulation on wires coming off the hi-temp sensors were burned through to exposure. Same black wires were fused together and possibly crossed current between them producing a possible electric bridge over-riding the switch. Extensive burned and fused wires.  Leads to hi temp switched are fused.  Note extensive burning on relay switch possibly not allowing thermostat to turn system OFF – contributing to constant ON failure mode.  Extensive burned and fused wires and scorched bi-metal overheat sensors.  Continuity across limit switch suggests run away failure in the ON position.

The damage to the unit was too extensive to test for sequence of cascading failures leading to the severe overheat condition.  Interviews with the operator suggest that the circuit breakers were reset at least once, possibly more times suggesting poor judgement.  The presence of fused wires that may have bypassed safety circuitry suggests an over reliance on breaker circuits by the manufacturer. However, the most obvious failure is the broken fan motor bracket.  Like most lower value appliances that are too bulky to transport over long distances, components are often shipped to a regional manufacturer who assembles packaged systems from a variety of components. The assembly of the fan and housing may have occurred at any number of sources under a variety of quality control conditions.  The combination of an unbalance fan wheel, and fail prone 3-spoke bracket,  and the omission of vibration  damping devices may all have contributed to the failure of the fan assembly.