Kramer 1.5 HP Medium Temperature Walk-In Cooler Refrigeration System
The Kramer KFO150E4SEA outdoor condensing unit and KL6A094ADASC low profile unit cooler form a factory-matched 1.5 HP medium temperature refrigeration package for walk-in coolers up to roughly 12 ft × 14 ft. It pairs a ZS11KAE extended-range scroll compressor with the same two-fan KL6A094 coil used on the 1.3 HP extended package, so the larger box is carried on additional compressor capacity rather than a bigger evaporator. Configured for R448A or R449A refrigerant, it holds steady medium temperature box conditions in supermarkets, commissary and catering kitchens, produce and floral operations, breweries, and beverage distribution where a sizable cooler sees heavy daily loading.
Is a 1.5 HP Refrigeration System the Right Size?
This package is matched to medium temperature walk-in coolers up to about 12 ft × 14 ft holding 35°F to 38°F. At 25°F suction on R448A or R449A, the KFO150E4SEA condensing unit produces 12,140 BTUH at a 95°F outdoor ambient — noticeably more compressor capacity behind the KL6A094 coil than the 1.3 HP extended package that uses the very same coil. The extra headroom is what lets the system serve a larger box and recover faster after heavy door traffic or a warm delivery.
Refrigeration load is driven by 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. Because the condensing unit is generously sized relative to the coil, this system holds capacity well as outdoor temperature climbs, still delivering 10,630 BTUH at a 110°F ambient for unshaded rooftop and slab installations in hot climates. Size from a calculated load rather than floor area to keep the compressor off short cycles and protect product temperature.
Ideal for: Larger, higher-turnover walk-in coolers in supermarkets and grocery stores, commissary and catering kitchens, produce and floral wholesalers, craft breweries and taprooms, and beverage or dairy distribution rooms.
Need more capacity? Step up to the Kramer 2 HP KFO200E4SEA & KL6A141ADASC Refrigeration System for walk-in coolers up to 16 ft × 16 ft. For a smaller box or lighter loading with the same evaporator coil, the Kramer 1.3 HP KFO130E4SEA & KL6A094ADASC system covers coolers up to 10 ft × 12 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 | KFO150E4SEA — 1.5 HP Medium Temperature Condensing Unit |
|---|---|
| Indoor Evaporator | KL6A094ADASC Low Profile Unit Cooler |
| Application | Medium Temperature Walk-In Cooler Refrigeration System |
| Evaporator Capacity | Approximately 10,900 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, Three Phase, 60 Hz Condensing Unit |
| Evaporator Electrical | 115V |
| Factory Charge | Nitrogen Holding Charge — Refrigerant Field Supplied |
| Manufacturer Warranty | 1 Year |
The KFO150E4SEA condensing unit and the KL6A094ADASC 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
KFO150E4SEA Outdoor Condensing Unit
- 1.5 HP ZS11KAE extended-range scroll compressor for medium and extended medium temperature duty
- 12,140 BTUH at 95°F ambient and 25°F suction on R448A or R449A
- 10,630 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 three phase draw of 9.3 rated load amps and 58 locked rotor amps, on a 15 amp minimum circuit ampacity with 20 amp maximum overcurrent protection
KL6A094ADASC Low Profile Unit Cooler
- 10,900 BTUH with R448A or R449A at 25°F SST and 10°F TD, and 9,400 BTUH on R404A
- Two-circuit coil fed by a refrigerant distributor for even refrigerant distribution across the coil face
- Factory-mounted thermostatic expansion valve, selected for R448A and R449A service
- Two heavy-duty balanced aluminum fans moving 1,570 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 55 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 cooler does the KFO150E4SEA suit?
Medium-temperature coolers up to roughly 12 ft × 14 ft holding 35°F to 38°F. Because it carries a larger box on the same coil as the 1.3 HP unit, sizing from a calculated load is worthwhile.
How is the KFO150E4SEA different from the 1.3 HP KFO130E4SEA?
Both use the same KL6A094 coil. The KFO150E4SEA steps up to a larger ZS11KAE compressor producing about 12,140 BTUH at 95°F ambient versus roughly 9,680 BTUH for the KFO130E4SEA, which is what extends coverage to a 12 ft × 14 ft box and speeds recovery.
Does the KFO150E4SEA include a liquid sub-cooling circuit?
Yes. An integral sub-cooling circuit provides an average of 3°F to 5°F of sub-cooling, which improves efficiency and keeps the expansion valve feeding stably on longer line runs.
What electrical service does the KFO150E4SEA require?
The condensing unit runs on 208-230V three-phase, 60 Hz, drawing about 9.3 rated load amps with a 15 amp minimum circuit ampacity and 20 amp maximum overcurrent protection. The evaporator is separately powered at 115V.
How hot an outdoor location can the condensing unit handle?
It is rated for outdoor installation and holds usable capacity up to a 110°F ambient, so it is suitable for rooftop and unshaded slab mounting in hot climates.
Where is a system this size typically installed?
Supermarkets, commissary and catering kitchens, produce and floral operations, breweries, and beverage rooms running a sizable, busy cooler.
Kramer KFO Condenser Technical SpecificationsKramer Installation GuideKramer Maintenence ManualKramer KL6 Technical SpecificationsKramer KL6 CatalogKramer Warranty
