SSTP-E Series Evaporators

EVAPCO’s SSTP-E penthouse evaporators are designed for freezers, coolers and docks requiring low, medium and high temperature applications.

These rooftop models maximize storage space within the building envelope, eliminate possible damage to evaporators, piping and valves by material handling equipment and/or forklifts. The penthouse design provides easier and safer working conditions for maintenance personnel servicing the evaporators, valves and piping, and minimizes possible product damage due to refrigerant leaks.

  • Constructed with heavy wall, 5/8 or 1.05 inch OD, Stainless Steel tubing featuring CrossCool™ Internal Tube Enhancement
  • Standard aluminum fin construction featuring ChannelFlow™ Fin Technology as standard (3.3 and 4.3, fins per inch as standard)
  • Optimized recirculation rate of 1.2:1.0 significantly reduces system refrigerant charge
  • Heavy-duty cast aluminum fans
  • Low sound fan motors ranging from 3 horsepower to 7.5 horsepower in 1160 RPM as standard
  • Factory constructed, one-piece enclosure as standard
  • Easy rooftop installation, no roof curb required
  • Aluminum safety grating over the return air opening and the fans
  • Full sized access doors on both sides of the unit

Warm room air is drawn into the one-piece enclosure and across the cooling coil. Refrigerant is circulated through the coil of the evaporator. Heat from the air is absorbed by the refrigerant through the coil tubes causing a portion of the refrigerant to evaporate. The air is cooled as it travels through the coil and is discharged into the room.

Optimized Coil Design
Heat Exchanger Coil

The coil tube diameter, geometry, and circuiting have been optimized through thousands of hours of theoretical modeling and laboratory testing.

  • Through the use of computational fluid dynamics (CFD) modeling software, finite heat transfer analysis, and proprietary coil performance calculation methods, EVAPCO engineers have identified significant design elements to improve the finned coil performance
  • The circuiting program used on all EVAPCO coils has been optimized based on actual coil operation in EVAPCO’s world class research laboratory

The result is optimal heat transfer efficiency with low airside pressure drop and low motor horsepower per ton.

Innovative Coil Technology
CrossCool

All SSTP-E Series stainless steel tubes feature CrossCool, an Internal Tube Enhancement that improves the internal film coefficient for more efficient heat transfer, resulting in:

  • Reduced refrigerant charge
  • Reduced refrigerant pump horsepower
  • Lower operating cost
  • Smaller line sizes and reduced overall installation costs
ChannelFlow

EVAPCO’s patented enhanced aluminum fin technology minimizes airside pressure drop while improving overall heat transfer performance, the unique fin design allows for free drainage of condensate during wet operation without water carryover.

Advanced Materials & Design Features
Superior Stainless Steel Technology

SSTP-E Series evaporators are constructed with high-grade type 304L stainless steel tubing and aluminum fins as standard.

  • Meets the requirements of ASME B31.5 refrigerant piping code
  • Stainless steel tubes are available in 5/8 inch or 1.05 inch OD
  • Coils are built in 3.3, 4.3, and 6 FPI as standard using a full-collar aluminum fin featuring EVAPCO’s ChannelFlow fin technology

For applications where corrosion of the aluminum fin is a concern, EVAPCO offers pre-coated epoxy fin stock.

Stronger Corrosion Protection

The casing and drain pans are constructed from G-235 hot dip galvanized steel with an option for type 304 stainless steel.

  • G-235 is the highest level of mil galvanizing offered in the industry and exceeds the zinc protection that other manufacturers provide when using G-90 mil galvanized steel
  • The higher level of galvanizing provides a greater level of corrosion protection for a longer product life
Efficient Evaporator Fans

EVAPCO’s extensive air side research and testing has identified fans with the best combination of efficiency and sound levels.Fans used in the SSTP-E Series evaporators have performance curves generated in EVAPCO’s AMCA Fan Test Chamber, ensuring the fans perform as required to deliver the certified cooling effect and power ratings as stated in the equipment quotation and submitted data.

  • Standard catalog models are selected to provide low sound levels
  • EVAPCO’s low sound fan selections provide more comfort and a safer working environment for personnel entering the cold space
Durable Fan Motors
  • All SSTP-E Series evaporators are supplied with totally enclosed air over (TEAO), foot-mounted fan motors with sealed bearings and low-temperature grease
  • Standard fan motors are suitable for operation on variable frequency drive from 2 horsepower motors to 15 horsepower motors, and are suitable for 230/460-volt, 3 phase, 60 cycle applications
  • Standard motors are across-the-line start and operate at either 1160, or 1750 RPM
  • All fan motors are foot-mounted for improved durability in a wide range of operating conditions
  • All fan motors are pre-wired to a NEMA 4 panel with IEC starter(s) and a fused disconnect
Insulated Enclosure
  • The enclosures of the SSTP-E Series evaporators have 4” thick R32 thermally insulated walls.
  • Foam panels are sandwiched between high grade aluminum sheet metal, eliminating air leaks and infiltration
  • Includes aluminum safety grating over the return air opening and the fans
Hygienic Drain Pans

Sloped in two directions to prevent water from pooling, the custom engineered drain pans in the SSTP-E Series evaporators are also equipped with swaged bottom outlets to ensure complete drainage.

  • Drain pans are factory mounted prior to shipment
  • Drain pans are insulated as standard
Rooftop Installation
  • SSTP-E Series evaporators can be set directly on the roof, no roof curb required
  • All controls, refrigeration valves, coils, fans, and motors are located outside the working environment
  • Eliminates the risk of damage from fork lifts and other material handling equipment
  • Eliminates the threat to workers and product, any leaks are vented directly to the atmosphere rather than the refrigerated space
  • Work within the building is not interrupted during maintenance on the SSTP-E Series evaporators
  • All evaporator controls, piping, fans, and motors are easily accessible without the use of extended lift equipment or ladders
  • Faster, more efficient defrost cycles since the units are outside of the refrigerated space
Maintenance and Accessibility
  • All SSTP-E Series evaporators are equipped with full sized access doors on each side of the unit, significantly improving maintenance access and eliminating potential ‘enclosed space’ issues
  • Fan and motor assemblies are designed to be removed in one piece, eliminating common maintenance difficulties and access issues
  • All SSTP-E Series evaporators include specially designed motor lift arms
Air Discharge Arrangements

Multi-directional discharge plenums for improved airflow and room coverage.

  • Galvanized or stainless steel
  • Extensions available
Defrost

Options include:

Air defrost with insulated drain pans.

Water defrost with water distribution system and special drain pan to prevent water.

Hot gas, coil only defrost with insulated drain pan.

Hot gas coil and pan with a hot gas coil under the inner drain pan:

  • The unique design of the hot gas drain pan provides for highly efficient defrost
  • Hot gas defrost units may be piped with either parallel feed to coil and drain pan or series flow from drain pan to coil
  • Hot gas pan-to-coil piping includes a factory mounted check valve

Electric defrost featuring electric resistance heater elements with termination thermostat:

  • Electric defrost options are sized based on room temperature.
  • Electric pan heaters included for room temperatures below 32°F
  • Electric defrost can be supplied with optional heater contactor
Control / Electrical

The standard motor control package includes a NEMA 4 Panel, IEC motor starter(s) and a fused disconnect.

Other electrical options include:

  • Arc-flash rated disconnect upstream of the main panel
  • Allen Bradley PLC system designed and provided by EVAPCO
  • Factory mounted VFD’s, combined with an Evapco PLC system
  • Factory mounted NH3 detector
  • Service receptacle
Fan Motors

Optional motors are available, including:

  • Washdown-duty fan motors for applications requiring Clean-In-Place or water clean-up cycles
Custom Coil Applications

Units can be customized to accommodate a variety of applications including the following:

  • Meeting existing footprints
  • Alternate supply of return air locations (end, side, etc.)
  • Two evaporators in one enclosure
  • High external static applications

Contact your EVAPCO Representative for more options.

Coil and Fin Options

Coil and fin options include:

  • Reheat coils for applications requiring humidity control; a separate heating coil is designed and circuited for refrigerant or an alternate heat source and is installed on the leaving air side of the cooling coil to heat the air to the desired temperature
  • Flat fins constructed from 0.014 inch aluminum.
  • Heavy fins constructed from 0.028 inch heavy gauge aluminum, making them 8-times stronger than the standard thickness fins, ideal for harsh environments and heavy frost applications
  • Pre-coated epoxy fins to provide additional resistance to corrosion
  • Canadian Registration Number (CRN) for Canadian applications
  • High conductivity stainless steel fin
Construction Options
  • Stainless steel interior and/or exterior
  • Access door safety switches
  • Insulated bottom panel for applications where there is an interstitial space between the roof and refrigerated area
  • Pitched base to match sloped roof
  • LED interior service lights
Document Categories
Name File Size Type Language
Cleaning Solutions and Sanitizers Keep Pace with Evaporator Coil Materials 1.02 MB Layout English
Global Product Catalog 53.71 MB Catalog English
Maintenance Schedule 87.79 KB O & M English
SSTP-E Brochure 1.73 MB Catalog English
White Paper: ANSI/AHRI Standard 420-2008 for FAn and Coil Evaporators - Benefits and Cost 194.35 KB White Paper English
White Paper: Low Recirculation Rate Evaporators 428.08 KB White Paper English
Drawing Types
Media name Drawing Type Drawing Format Product Model
SSTP1-22103-200P Unit Certified (English) Unit Certified Print (.pdf) SSTP1-22103-200P
SSTP1-22103-300P Unit Certified (English) Unit Certified Print (.pdf) SSTP1-22103-300P
SSTP1-22103-300Q Unit Certified (English) Unit Certified Print (.pdf) SSTP1-22103-300Q
SSTP1-22103-500L Unit Certified (English) Unit Certified Print (.pdf) SSTP1-22103-500L
SSTP1-22103-500M Unit Certified (English) Unit Certified Print (.pdf) SSTP1-22103-500M
SSTP1-22103-750L Unit Certified (English) Unit Certified Print (.pdf) SSTP1-22103-750L
SSTP1-22103-750M Unit Certified (English) Unit Certified Print (.pdf) SSTP1-22103-750M
SSTP1-22104-200P Unit Certified (English) Unit Certified Print (.pdf) SSTP1-22104-200P
SSTP1-22104-300P Unit Certified (English) Unit Certified Print (.pdf) SSTP1-22104-300P
SSTP1-22104-300Q Unit Certified (English) Unit Certified Print (.pdf) SSTP1-22104-300Q