Kramer 1/2 HP Medium Temperature Walk-In Cooler Refrigeration System
The Kramer KFO060M4SDA outdoor condensing unit and KL6A052ADASC low profile unit cooler ship as a factory-matched medium temperature refrigeration package rated at 6,000 BTUH with R448A or R449A refrigerant at 25°F suction and a 10°F TD. A 1/2 HP scroll compressor, an integral liquid sub-cooling circuit, a factory-mounted expansion valve, and a dual-speed electronically commutated evaporator motor combine to hold steady box temperatures in restaurants, convenience stores, delis, bakeries, breweries, floral shops, school kitchens, and beverage storage rooms where a compact cooler needs dependable, code-compliant refrigeration.
Is a 1/2 HP Refrigeration System the Right Size?
This package sits at the entry point of the Kramer medium temperature line and is matched to refrigeration loads in the neighborhood of 6,000 BTUH, which typically corresponds to a well-insulated cooler around 6 ft × 6 ft to 6 ft × 8 ft holding roughly 35°F to 38°F. Box dimensions alone do not determine the correct system, however. Two coolers of identical footprint can carry very different loads depending on what goes in them and how often the door swings.
Insulation R-value, the ambient temperature the condensing unit sees on the roof or slab, daily door-opening frequency, the volume and entering temperature of product loaded each day, target box temperature, and required pull-down time all shift the calculated load. Warm product loaded in bulk, heavy door traffic during a lunch rush, or a condensing unit in full afternoon sun in a Gulf Coast summer can each push a box past what a 1/2 HP system will hold. Sizing from an actual load calculation rather than square footage keeps the compressor off short cycles and protects product temperature.
Ideal for: Compact walk-in coolers in quick-service and full-service restaurants, convenience stores, delicatessens, bakeries, small groceries, craft breweries and taprooms, wineries, floral shops, school and institutional kitchens, and beverage or dairy storage rooms.
Need more capacity? Step up to the Kramer 3/4 HP KFO080M4SDA & KL6A066ADASC Refrigeration System for larger medium-temperature walk-in cooler applications requiring additional refrigeration capacity.
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 | KFO060M4SDA — 1/2 HP Medium Temperature Condensing Unit |
|---|---|
| Indoor Evaporator | KL6A052ADASC Low Profile Unit Cooler |
| Application | Medium Temperature Walk-In Cooler Refrigeration System |
| Refrigerant | R448A or R449A |
| Compressor | High-Efficiency 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 KFO060M4SDA condensing unit and the KL6A052ADASC low profile evaporator are also stocked individually for replacement work. Buying them together as this matched package keeps the condensing unit capacity and the coil capacity aligned at design conditions, so the system is not fighting a mismatched coil. Both halves share 3/8 in. liquid and 5/8 in. suction connections, which simplifies line sizing and field brazing on a compact installation. Both units ship with 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
KFO060M4SDA Outdoor Condensing Unit
- 1/2 HP ZB06KAE scroll compressor built for medium temperature duty
- 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
- All-weather painted galvanized steel housing rated for ambient air temperatures up to 110°F
- Ships under a nitrogen holding charge, with a refrigerant receiver, isolation valve, and pressure relief plug
- Liquid line with sealed filter and sight glass, plus a factory crankcase heater
- Fixed high-pressure and adjustable low-pressure controls with electronic air defrost timer
- Quick-access shut-off valves, hinged removable control panel door, and color-coded point-to-point wiring
- FM1 cabinet measuring 28-1/4 in. deep by 27-7/8 in. wide by 18-3/4 in. high, approximately 195 lb, 70 dBA at 10 ft, AWEF 7.60
KL6A052ADASC Low Profile Unit Cooler
- 6,000 BTUH with R448A or R449A at 25°F SST and 10°F TD, and 5,200 BTUH on R404A
- Factory-mounted SBFSE-AA-C thermostatic expansion valve, selected for R448A and R449A service
- Single heavy-duty 12 in. balanced aluminum fan moving 785 CFM through a draw-through air pattern
- Dual-speed electronically commutated 115V motor 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
- Single-feed circuit coil requiring no distributor or nozzle
- Removable drain fitting at the bottom of the drain pan with a 3/4-14 NPT connection, replaceable without changing the pan
- 27-1/8 in. wide by 18-1/8 in. high by 15-1/2 in. deep, approximately 44 lb, two hanger slot locations, AWEF 9.00, 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 KFO060M4SDA designed for?
This package is matched to a refrigeration load near 6,000 BTUH, which commonly lines up with a properly insulated medium temperature box in the 6 ft × 6 ft to 6 ft × 8 ft range holding 35°F to 38°F. Because insulation thickness, outdoor ambient, door traffic, and daily product load all move the calculated load, use a load calculation rather than floor area to confirm the selection.
How is the KFO060M4SDA different from the other sizes in this line?
The KFO060M4SDA is the smallest medium temperature scroll model Kramer builds in this series at 1/2 HP. It uses the compact single-fan FM1 cabinet and pairs with a single-fan evaporator, which keeps both the footprint and the connected electrical load small. Larger models in the line move to wider FM2 and FM3 cabinets with two condenser fans and multi-fan unit coolers to serve higher loads.
What refrigerant does the KFO060M4SDA system use?
This Kramer refrigeration package is configured for R448A and R449A refrigerants, which are commonly used in modern commercial medium-temperature refrigeration applications.
Does this system ship with refrigerant?
No. Both the condensing unit and the evaporator ship with a nitrogen holding charge only. R-448A or R-449A refrigerant is field supplied, and the system must be evacuated, charged, and commissioned by an EPA 608 certified technician.
Is this system designed for walk-in freezers?
No. This package is designed for medium-temperature walk-in coolers. Freezer applications require refrigeration equipment designed for lower operating temperatures and appropriate defrost methods.
Can the KFO060M4SDA condensing unit be installed outdoors?
Yes. The KFO060M4SDA is designed as an outdoor condensing unit, while the KL6A052ADASC evaporator installs inside the walk-in cooler.
What businesses commonly use this refrigeration system?
Compact cooler boxes of this size are typical in quick-service and full-service restaurant kitchens, convenience stores, delicatessens, bakeries, small grocery and specialty food shops, craft breweries and taprooms, wineries, floral retailers, and school or institutional kitchens holding produce, dairy, and beverages.
Kramer KFO Condenser Technical SpecificationsKramer Installation GuideKramer Maintenence ManualKramer KL6 Technical SpecificationsKramer KL6 CatalogKramer Warranty
