Kramer 1.75 HP Medium Temperature Walk-In Cooler Refrigeration System
The Kramer KFO180E4SDA outdoor condensing unit and KL6A117ADASC low profile unit cooler form a factory-matched 1.75 HP medium temperature refrigeration package for walk-in coolers up to roughly 14 ft × 14 ft. A ZS13KAE extended-range scroll compressor is paired with a larger three-circuit KL6A117 coil, stepping up both the compressor and the evaporator over the 1.5 HP package to hold temperature in a bigger, busier box. Configured for R448A or R449A refrigerant, it suits high-volume walk-in coolers in supermarkets, distribution and commissary operations, produce houses, breweries, and institutional kitchens.
Is a 1.75 HP Refrigeration System the Right Size?
This package is matched to medium temperature walk-in coolers up to about 14 ft × 14 ft holding 35°F to 38°F. At 25°F suction on R448A or R449A the KFO180E4SDA condensing unit produces 13,690 BTUH at a 95°F outdoor ambient, and the KL6A117 coil is rated 13,600 BTUH at 25°F SST and a 10°F TD — so the condensing unit and evaporator are closely matched at design conditions rather than one throttling the other.
Refrigeration load depends on insulation R-value, outdoor ambient, door-opening frequency, the quantity and entering temperature of product loaded each day, target box temperature, and required pull-down time. Unlike the step from the 1.3 HP to the 1.5 HP package, which shared a coil, this system moves up to a larger three-circuit evaporator for more even refrigerant distribution across a wider coil face, and it holds 11,980 BTUH at a 110°F ambient for hot rooftop and unshaded slab locations. Size from a calculated load rather than floor area to keep the compressor off short cycles and protect product temperature.
Ideal for: Large, high-turnover walk-in coolers in supermarkets and grocery distribution, commissary and catering operations, produce and floral wholesalers, craft breweries and taprooms, and institutional or school kitchens.
Need more capacity? Step up to the Kramer 2 HP KFO200E4SDA & KL6A141ADASC Refrigeration System for walk-in coolers up to 16 ft × 16 ft. For a smaller box, the Kramer 1.5 HP KFO150E4SDA & KL6A094ADASC system covers coolers up to 12 ft × 14 ft.
Recommended refrigeration applications are general guidelines only. Actual system requirements depend on insulation, ambient conditions, door openings, product load, and operating temperature. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Condensing Unit | KFO180E4SDA — 1.75 HP Medium Temperature Condensing Unit |
|---|---|
| Indoor Evaporator | KL6A117ADASC Low Profile Unit Cooler |
| Application | Medium Temperature Walk-In Cooler Refrigeration System |
| Evaporator Capacity | Approximately 13,600 BTUH (R448A/R449A, 25°F S.T., 10°F TD) |
| Refrigerant | R448A or R449A |
| Compressor | High-Efficiency Extended-Range Scroll Compressor |
| Evaporator Defrost | Air Defrost |
| Electrical | 208-230V, Single Phase, 60 Hz Condensing Unit |
| Evaporator Electrical | 115V |
| Factory Charge | Nitrogen Holding Charge — Refrigerant Field Supplied |
| Manufacturer Warranty | 1 Year |
The KFO180E4SDA condensing unit and the KL6A117ADASC low profile evaporator are also stocked individually for replacement work. Ordering them together as this matched package keeps the condensing unit and coil capacities aligned at design conditions. Both units ship under a nitrogen holding charge, so plan on field-supplied R-448A or R-449A refrigerant and evacuation, charging, and commissioning by an EPA 608 certified technician.
Condensing Unit & Evaporator Features
KFO180E4SDA Outdoor Condensing Unit
- 1.75 HP ZS13KAE extended-range scroll compressor for medium and extended medium temperature duty
- 13,690 BTUH at 95°F ambient and 25°F suction on R448A or R449A
- 11,980 BTUH still available at 110°F ambient and 25°F suction for rooftop and unshaded slab installations
- Integral liquid sub-cooling circuit providing an average 3°F to 5°F of sub-cooling for improved efficiency and stable expansion valve operation
- Flooded head pressure control standard, supporting operation as outdoor ambient temperatures drop
- Generously sized condenser coil with enhanced copper tubes and aluminum fins in an all-weather painted galvanized steel housing
- Ships under a nitrogen holding charge, with a refrigerant receiver, isolation valve, and pressure relief plug
- Liquid line with sealed filter and sight glass, factory crankcase heater, and electronic air defrost timer
- Fixed high-pressure and adjustable low-pressure controls, with quick-access shut-off valves and color-coded point-to-point wiring
- 208-230V single phase draw of 10.8 rated load amps and 56 locked rotor amps, on a 15.5 amp minimum circuit ampacity with 25 amp maximum overcurrent protection
KL6A117ADASC Low Profile Unit Cooler
- 13,600 BTUH with R448A or R449A at 25°F SST and 10°F TD, and 11,700 BTUH on R404A
- Three-circuit coil fed by a refrigerant distributor for even refrigerant distribution across the wider coil face
- Factory-mounted thermostatic expansion valve, selected for R448A and R449A service
- Two heavy-duty balanced aluminum fans moving 1,550 CFM total through a draw-through air pattern
- Dual-speed electronically commutated 115V motors with thermal overload protection, compliant with California Title 24
- 6 fins-per-inch coil using 3/8 in. enhanced copper tubes mechanically expanded into corrugated aluminum fins with die-formed collars
- Air defrost configuration intended for coolers held at 35°F and warmer, factory wired to screw-type terminal strips
- Embossed aluminum casing with baffled fan sections, NSF compliant and designed to mount flush to the ceiling
- Removable 3/4-14 NPT drain fitting at the bottom of the pan, replaceable without changing the pan
- 43-5/8 in. wide cabinet, approximately 58 lb, two hanger slot locations, 3/8 in. liquid and 5/8 in. suction connections, UL and cUL listed
Specifications & Manuals
Product documentation includes technical specifications, installation information, maintenance instructions, warranty information, and KL6 Series literature to assist with equipment selection, installation, and service. This system carries a 1 year manufacturer warranty; see the Kramer warranty documentation above for full coverage terms and conditions.
Frequently Asked Questions
What size walk-in cooler is the KFO180E4SDA matched to?
Medium-temperature coolers up to about 14 ft × 14 ft holding 35°F to 38°F, confirmed against a calculated load.
How is the KFO180E4SDA different from the 1.5 HP KFO150E4SDA?
It steps up on both sides: a larger ZS13KAE compressor producing about 13,690 BTUH at 95°F ambient, paired with the three-circuit KL6A117 coil rated 13,600 BTUH instead of the two-circuit KL6A094. The result carries a bigger room with more even coil loading.
Why does the KL6A117 use a three-circuit coil?
As coil capacity climbs, a distributor feeding three circuits keeps refrigerant velocity and distribution balanced across a wider coil face, so all of the surface does its share of the work rather than starving the far end.
What size breaker does the KFO180E4SDA need?
The condensing unit calls for a 15.5 amp minimum circuit ampacity and a 25 amp maximum overcurrent protection on a dedicated 208-230V single-phase circuit; the 115V evaporator is powered separately.
Can this system be used for a walk-in freezer?
No. It is built for medium-temperature walk-in coolers using air defrost. Freezer service requires low-temperature equipment with an electric or hot-gas defrost method.
Are the evaporator fan motors energy-efficient?
Yes. The KL6A117 uses dual-speed electronically commutated (EC) motors, which draw less power than standard PSC motors and meet California Title 24 requirements.
Kramer KFO Condenser Technical SpecificationsKramer Installation GuideKramer Maintenence ManualKramer KL6 Technical SpecificationsKramer KL6 CatalogKramer Warranty
