Kramer 5 HP Low Temperature Refrigeration Condensing Unit
The Kramer KFO500L4SDB is a 5 HP outdoor condensing unit built for low-temperature walk-in freezer refrigeration. A ZF15K4E low-temperature scroll compressor delivers approximately 16,070 BTUH at a 95°F ambient and a -20°F saturated suction temperature on R448A or R449A refrigerant, holding a walk-in freezer near a -10°F box temperature. Sold as the condensing unit only, it matches a Kramer low-profile electric-defrost evaporator to form the largest single-phase freezer package in this line.
Is a 5 HP Low-Temp Condensing Unit the Right Size?
At 95°F ambient and -20°F SST the KFO500L4SDB produces about 16,070 BTUH on R448A or R449A, matched to a walk-in freezer holding roughly -10°F. Freezer load is driven by insulation R-value, outdoor ambient, door-opening frequency, the quantity and entering temperature of product frozen or stored each day, and required pull-down time, so size from a calculated load rather than floor area alone.
This listing is for the outdoor condensing unit only. To build a complete walk-in freezer system, it pairs with a matched Kramer low-profile unit cooler with electric defrost — the KFO500L4SDB is factory-matched to the KL6E142DDASC evaporator. Low-temperature evaporators use electric defrost rather than air defrost, because a freezer coil accumulates frost that off-cycle box air cannot clear.
Ideal for: the largest single-phase freezer applications, including frozen distribution centers, processing plants, and industrial cold storage.
For a smaller freezer, see the Kramer 4 HP KFO400L4SDB Low-Temp Condensing Unit.
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.
Condensing Unit Specifications
| Condensing Unit Model | KFO500L4SDB |
|---|---|
| Horsepower | 5 HP |
| Compressor | ZF15K4E Low-Temperature Scroll Compressor |
| Application | Low Temperature Walk-In Freezer Refrigeration |
| Refrigerant | R448A or R449A |
| Capacity | Approximately 16,070 BTUH at 95°F ambient and -20°F SST |
| Electrical | 208-230V, Single Phase, 60 Hz |
| Minimum Circuit Ampacity | 37.1 A |
| Maximum Overcurrent Protection | 60 A |
| Matched Evaporator | KL6E142DDASC Low Profile Unit Cooler (sold separately) |
| Factory Charge | Nitrogen Holding Charge — Refrigerant Field Supplied |
| Manufacturer Warranty | 1 Year |
Condensing Unit Features
- 5 HP ZF15K4E low-temperature scroll compressor rated for walk-in freezer duty
- Approximately 16,070 BTUH at 95°F ambient and -20°F saturated suction on R448A or R449A
- Configured for R448A and R449A, the current-generation replacements for R404A in low-temperature refrigeration
- Integral liquid sub-cooling circuit 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 defrost termination provisions for a matched electric-defrost evaporator
- 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, drawing about 24.7 rated load amps and 169 locked rotor amps, on a 37.1 amp minimum circuit ampacity and 60 amp maximum overcurrent protection
Specifications & Manuals
Product documentation includes technical specifications, installation information, maintenance instructions, and warranty information to assist with equipment selection, installation, and service. This condensing unit carries a 1 year manufacturer warranty; see the Kramer warranty documentation above for full coverage terms and conditions.
Frequently Asked Questions
What size freezer does the KFO500L4SDB handle?
It is the largest single-phase low-temperature unit in this line, rated about 16,070 BTUH at 95°F ambient and -20°F SST for large industrial and distribution freezers near -10°F.
Is an evaporator supplied with the KFO500L4SDB?
No. This is the condensing unit only; it pairs with a matched low-profile electric-defrost evaporator that is sold separately.
How is the KFO500L4SDB different from the 4 HP KFO400L4SDB?
At 5 HP it steps up from the 4 HP KFO400L4SDB (about 12,990 BTUH) to about 16,070 BTUH, the top of the single-phase low-temperature range, for the largest freezers on single-phase power.
What compressor does the KFO500L4SDB use?
A ZF15K4E Copeland low-temperature scroll compressor, the largest low-temperature scroll offered on single-phase power in this line.
Can the KFO500L4SDB be mounted outdoors?
Yes. It is an outdoor-rated condensing unit with an all-weather housing; the matched KL6E142DDASC evaporator installs inside the freezer.
Does the KFO500L4SDB ship charged?
No. It ships with a nitrogen holding charge only, and R-448A or R-449A is field supplied and commissioned by an EPA 608 certified technician.
Kramer KFO Condenser Technical SpecificationsKramer Installation GuideKramer Maintenence ManualKramer Warranty
