Kramer 1 HP Extended Medium Temperature Walk-In Cooler Refrigeration System
The Kramer KFO130E4SDA outdoor condensing unit and KL6A094ADASC low profile unit cooler form a factory-matched package built around an extended medium temperature scroll compressor. Where the medium-temperature models below it publish capacity only down to 0°F suction, this unit is rated across a wider suction range, giving more headroom for coolers that pull down harder or run below a conventional medium-temperature setpoint. Paired with a 10,900 BTUH coil that runs at reduced temperature difference, it suits produce and floral coolers, restaurant and commissary kitchens, grocery back-of-house, beverage distribution, and catering operations where humidity retention matters as much as raw capacity.
Is a 1 HP Extended Medium Temperature Refrigeration System the Right Size?
This package suits a well-insulated medium temperature box up to roughly 10 ft × 12 ft held at 35°F to 38°F, and it is chosen for a different reason than the medium-temperature packages below it. The KFO130E4SDA delivers 9,680 BTUH at 95°F ambient and 25°F suction, a modest step in raw capacity, but it is paired with a coil rated 10,900 BTUH at those same conditions. Because the coil is rated above what the condensing unit supplies, the system settles at a lower temperature difference than the nominal 10°F.
A lower operating TD means the coil pulls less moisture out of the air, so the box holds humidity better. For produce, cut flowers, unwrapped baked goods, and anything else that dehydrates on the shelf, that matters more than the last few hundred BTUH of capacity. The extended medium temperature rating also gives usable capacity at suction temperatures below the medium-temperature range, which helps in boxes that see deep pull-downs after large warm deliveries. Load still depends on insulation, outdoor ambient, door traffic, and daily product volume, so confirm against a calculated load.
Ideal for: Produce and floral coolers, restaurant and commissary kitchens, grocery and specialty food back-of-house, beverage distribution and wholesale storage, craft breweries, catering and banquet operations, and institutional foodservice where humidity retention and pull-down performance both matter.
Need more capacity? Step up to the Kramer 1-1/4 HP KFO150E4SDA & KL6A094ADASC system, which pairs the same unit cooler with a larger condensing unit for greater refrigeration capacity. If humidity retention is not a priority and you simply need dependable medium-temperature cooling, the Kramer 1 HP KFO100M4SDA & KL6A073ADASC medium-temp system covers a similar load.
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 | KFO130E4SDA — 1 HP Extended Medium Temperature Condensing Unit |
|---|---|
| Indoor Evaporator | KL6A094ADASC 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 |
Two installation notes worth catching before the job is scheduled. The KL6A094ADASC evaporator uses the same 43-5/8 in. cabinet and 33-1/4 in. hanger slot spacing as the coil in the 1 HP medium-temperature package, so on that particular retrofit the ceiling layout carries straight across. The KFO130E4SDA condensing unit also stays in the familiar FM1 cabinet at roughly 195 lb with 3/8 in. liquid and 5/8 in. suction connections. Electrically, however, this is the first model in the progression to call for a maximum overcurrent protection of 20 amps rather than 15, so verify the existing circuit before reusing it. Both units ship under a nitrogen holding charge, so plan on field-supplied R-448A or R-449A refrigerant and commissioning by an EPA 608 certified technician.
Condensing Unit & Evaporator Features
KFO130E4SDA Outdoor Condensing Unit
- 1 HP ZS09KAE extended-range scroll compressor, replacing the medium-temperature-only ZB series used in the smaller packages
- 9,680 BTUH at 95°F ambient and 25°F suction on R448A or R449A, with published capacity extending down to a 10°F suction temperature
- 8,460 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
- 208-230V single phase draw of 9.0 rated load amps and 40.3 locked rotor amps, on a 15 amp minimum circuit ampacity with 20 amp maximum overcurrent protection
- FM1 cabinet at 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
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
- Rated above the condensing unit at design conditions, so the system operates at a reduced temperature difference and pulls less moisture from the box
- Two heavy-duty 12 in. balanced aluminum fans moving 1,570 CFM through baffled fan sections that prevent short cycling of discharge air
- Two-circuit coil fed by a refrigerant distributor with a 1/2 in. connection for even refrigerant distribution across the coil face
- Factory-mounted SBFDE-series thermostatic expansion valve, matched to R448A and R449A service
- Dual-speed electronically commutated 115V motors drawing a combined 1.6 amps, with thermal overload protection and California Title 24 compliance
- 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
- Removable 3/4-14 NPT drain fitting at the center rear of the pan, with slide-out end panels for front or side service access
- 43-5/8 in. wide by 18-1/8 in. high by 15-1/2 in. deep, approximately 55 lb, hanger slots spaced 33-1/4 in. apart, NSF compliant, 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 KFO130E4SDA designed for?
This package suits a properly insulated medium temperature box up to roughly 10 ft × 12 ft holding 35°F to 38°F. Because the coil is rated above the condensing unit, the system runs at a lower temperature difference than nominal, which favours applications where humidity retention matters. Verify the selection against a calculated load.
What does "extended medium temperature" mean on the KFO130E4SDA?
Extended medium temperature is Kramer's designation for units built with a wider usable suction range than standard medium-temperature models. The KFO130E4SDA uses a ZS-series scroll compressor and publishes rated capacity down to a 10°F suction temperature, whereas the medium-temperature-only models below it are rated no lower than 0°F. In practice this gives more headroom during deep pull-downs and in boxes running toward the lower end of the cooler range.
How is the KFO130E4SDA different from the 1 HP KFO100M4SDA?
Both are rated 1 HP, but they are built for different duty. The KFO100M4SDA uses a ZB-series medium-temperature scroll and pairs with an 8,500 BTUH coil. The KFO130E4SDA uses a ZS-series extended-range scroll, produces slightly more capacity at design conditions, and pairs with a larger 10,900 BTUH coil that lowers the operating temperature difference. Choose the KFO130E4SDA when humidity retention or pull-down performance matters, and note that it requires 20 amp overcurrent protection rather than 15.
What refrigerant does the KFO130E4SDA system use?
This Kramer refrigeration package is configured for R448A and R449A refrigerants, which are commonly used in modern commercial medium-temperature refrigeration applications.
Why is the evaporator rated higher than the condensing unit?
It is intentional. When the coil can absorb more heat than the condensing unit can reject, the system balances at a smaller temperature difference between the coil and the box air. A lower temperature difference means less moisture condenses on the coil, so the box stays more humid and product dehydrates more slowly. The trade is that usable system capacity is governed by the condensing unit rather than the coil rating.
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. Despite the extended suction range, this package is designed for medium-temperature walk-in coolers with air defrost. Freezer applications require refrigeration equipment designed for low-temperature operation and an appropriate defrost method.
Can the KFO130E4SDA condensing unit be installed outdoors?
Yes. The KFO130E4SDA is designed as an outdoor condensing unit rated for ambient air temperatures up to 110°F, while the KL6A094ADASC evaporator installs inside the walk-in cooler, mounted flush to the ceiling with 12 in. of clearance from the back wall.
What businesses commonly use this refrigeration system?
Produce and floral coolers, restaurant and commissary kitchens, grocery and specialty food back-of-house, beverage distributors and wholesalers, craft breweries, catering and banquet operations, and institutional foodservice where both humidity retention and recovery after deliveries matter.
Kramer KFO Condenser Technical SpecificationsKramer Installation GuideKramer Maintenence ManualKramer KL6 Technical SpecificationsKramer KL6 CatalogKramer Warranty
