This Xetex project features a custom Dedicated Outdoor Air System (DOAS) with 120 tons of cooling for a fragrance manufacturing application.
Although the custom DOAS did not handle caustic substances, the customer placed great importance on proper handling of fumes. Addressing this concern, an aluminum flat plate heat exchanger was chosen for its minimal EATR leakage. The unit also utilizes filtration throughout to remove particulates at the OA, RA, and SA streams.
Additionally, a specialized control sequence was implemented to maintain a negative pressure differential on the exhaust side of 1.5”w.c. below that of the supply side, ensuring optimal performance.
Unit startup was provided by a factory-certified technician to ensure correct operation.
Specification
Model: XHS-80-120-RT-BP-CD-HI-SF-AC
Height: 136”H x 164”W x 438”L
Weight: 38,000 lbs.
OA Summer Design: 93°Fdb / 74°Fwb
OA Winter Design: 10°Fdb
Supply CFM: 28,000 CFM
Energy Recovery: Aluminum flat plate heat exchanger
Cool Type: 120 tons - DX
Heat Type: Indirect Gas Furnace
Leaving Cooling Temp: 53.8°Fdb / 53.6°Fwb
Leaving Heating Temp: 68.0°Fdb
Construction
- Outdoor unit with 2” double wall construction:
- 18ga/22ga casing with mineral wool insulation
- Welded steel base frame
- Unit designed in four split sections
Other Features
- 460/60/3 single-point power connections with non-fused disconnect switches
- Access Lighting
- ODP Premium Motors
Components
A) Low leakage OA shut-off damper
B) OA 2” MERV-8 filters
C) OA 4” Mini Pl MERV-13 filters
D) OA face and bypass dampers with actuators
E) EA shut-off damper
F) SA and EA fan arrays with energy-efficient airfoil fans
G) RA 2” MERV-8 filters
H) RA carbon filters
I) XLT flat plate heat exchanger
J) SA carbon filters
K) DX coil
L) Stainless steel indirect-fired natural gas furnace
Contact XeteX for your next custom DOAS.