WPPH – 100 DOAS WATER COOLED
WPPH – 100 DOAS WATER COOLED
Petra 100% DOAS Water Cooled Package Unit
DESCRIPTION
Petra 100% DOAS Water Cooled Package Unit
It is becoming increasingly important to create a whole set of solutions for 100% DOAS units, where all accessories can be included, furnished and controlled with optimum performance and quality in a single piece unit
Petra Engineering Industries provides a unique solution in a quality made unit with humidity control in addition to a vast choice of accessories and options to suit project requirements. Petra manufacturers units from 5 to 300 Tons, distinguished by their small foot print and high efficiencies. Petra design efficiencies far exceed AHRI 920 for DOAS
STANDARD FEATURES
- Structural welded galvanized steel C-channel base with full supporting cross members, equipped with screwed-in lifting lugs (eye bolts) of suitable loading capacity which are fitted on a welded bracket to the side of the C- channel
- Double Wall G-90 galvanized steel
- 50 mm (2”) injected foam, 3 pcf insulation density as minimum
- Thermally broken Panels & doors along full unit circumference (roof, floor & wall panels)
- 16-20 gauge painted interior and exterior panels
- Each panel a machine applied foam gasket that seals all around its edges
- Standard Cu/Al DX-coil with stainless steel casing
- Cu/Al hot water coil with stainless steel casing
- Cu/Al heat pipe coil with stainless steel casing
- Cu/Al hot gas reheat coil (HGRC) with stainless steel casing
- Economizer coil “free cooling” for energy saving as optional
- Stainless steel double sloped drain pan under all coils (extended)
- Single width single inlet (SWSI) EC fans
- All fans are statically and dynamically balanced
- EC fan is controlled by unit microprocessor controller
- NEMA 3X minimum panel enclosure
- Panel door has a door retainer to keep door open during service
- Standard 50 mm (2”) thick pleated (MERV 8) flat filter in a painted galvanized steel frame with side withdrawal access
- Digital or VFD controlled high efficiency scroll compressor
- Independent/dependent circuits to provide redundancy
- Unit is easy accessible with access doors or removable panels
- Brazed plate heat exchanger as standard
- Electronic expansion valve is standard with variable speed compressor
- Exhaust Gravity Shutter made from G90 painted galvanized steel (gauge 20)
- Sensible Core energy recovery cross flow heat exchanger, consists of alternate Layers of plates; separated and sealed
OPTIONAL FEATURES
- Copper tubes copper fins coil
- Coil corrosion protection including polyurethane pre-coating (for aluminum fins) and polyurethane post-coating (for aluminum & copper fins)
- Sound reduction options including low rpm condenser fan & compressor jacket
- Availability of using Heat Pipe coil which increase the EER “Energy Efficiency Ratio” with same unit’s foot print
- Gas Heater and Electric Heater
- SCR Control for Electric Heater
- Modulating Kit for Gas Heater
- Stainless steel and aluminum panels are optional
- SWSI plenum & DWDI centrifugal fans are optional
- Piezometer ring air flow measurement
- VFD for SWSI plenum & DWDI centrifugal fans
- Vibration isolators are available in rubber-in-shear, 1” open type springs or 2” seismic springs for base mounted fans
- MERV 13 filter media
- Angle filter design
- 4”, 6” & 12” thick filter media
- Dirty filter switch
- Filter pressure gauge
- Shell & tube condenser
- Enthalpy core plate heat Exchanger is optional
