Description
Product Summary
This Kramer walk-in cooler refrigeration system pairs the Next-Gen KFO060M4SDA 1/2 HP medium temperature scroll condensing unit with the Kramer KL6A066ADASC low profile unit cooler. It is sized for a 6' x 8' walk-in cooler with an 8 ft ceiling held at 35°F, a common setup for restaurants, convenience stores, florists and small grocers.
Both halves are Kramer, and the match is built from Kramer's own published ratings. A 6' x 8' x 8' cooler at 35°F carries a standard box load of 5,884 BTU/h. Kramer's condensing unit catalog rates the KFO060M4SDA at 6,580 BTU/h on R-448A with 95°F outdoor air and a +25°F suction temperature, about 12% above the box load, and Kramer's unit cooler catalog rates the KL6A066ADASC at 7,800 BTU/h on R-448A at a 10°F coil temperature difference. Both catalogs are linked below so you or your contractor can check the numbers.
The Next-Gen condensing unit is Kramer's compact outdoor line for small and medium walk-ins, built around a Copeland ZB06KAE scroll compressor on 208/230V 1-phase power, and rated for R-448A, R-449A and R-404A.
The Kramer low profile unit cooler mounts to the ceiling of the box, runs on 115V with an EC 2-speed fan motor, and uses air defrost, the normal choice for a cooler held above freezing. It ships with the R-448A/R-449A expansion valve, liquid line solenoid valve and electronic thermostat already mounted, so there are fewer loose parts on the job.
Key Features
- All Kramer system: condensing unit and unit cooler from the same manufacturer, sized from Kramer's published R-448A ratings.
- Copeland scroll compressor: the ZB06KAE scroll delivers 6,580 BTU/h at 95°F outdoor air against a 5,884 BTU/h box load.
- Factory-mounted valves and thermostat: the expansion valve, solenoid valve and electronic thermostat arrive mounted on the unit cooler.
- Low profile EC fan coil: a slim ceiling-mounted coil with EC 2-speed motors saves headroom and power inside the box.
Frequently Asked Questions
What size walk-in cooler is this system for?
It is sized for a 6' x 8' walk-in cooler with an 8 ft ceiling held at 35°F under a standard load of 5,884 BTU/h. A box with heavy door traffic, warm product loading or glass doors can need more capacity, so call us at 1.888.509.3391 before ordering if your box is different.
How were these two units matched?
We sized the condensing unit and unit cooler from Kramer's own published capacity tables on R-448A at 95°F outdoor air, and both units cover the box load. Walk-in refrigeration does not use AHRI matched-system numbers like home air conditioners; each unit is rated on its own, and the Kramer catalogs behind this match are linked in the documents below.
How is the box temperature controlled?
The electronic thermostat opens and closes the liquid line solenoid valve. When the box reaches temperature, the solenoid closes, the system pumps down and the compressor shuts off on its low pressure control. When the box warms up, the solenoid opens and the compressor restarts, while the expansion valve meters refrigerant into the coil.
Does this system need a licensed installer?
Yes. A split refrigeration system needs refrigerant piping, evacuation, charging and electrical work, so it should be installed by a licensed refrigeration technician following Kramer's installation instructions.
White Paper
