Bosch CL048-1VTC-LRT-PUA 4 Ton Water Source Heat Pump

Product Description

The BOSCH CL048-1VTC-LRT-PUA is a 4-ton (48,000 BTU/h) commercial-grade water-source heat pump built for vertical installation with right-hand return airflow. It operates on R-454B refrigerant, an A2L low-GWP refrigerant that meets current environmental standards. The unit uses a scroll compressor, standard on sizes 024 and up, and incorporates integrated vibration isolation for quieter operation. The galvanized steel cabinet with a factory-installed sound package reduces noise transmission in occupied spaces. A swing-open electrical box and slide-out blower assembly speed up routine service calls, and the water coil includes freeze protection for added reliability in variable load conditions. Licensed HVAC technicians handle installation and commissioning.

This unit is suited for commercial and light-commercial hydronic loop applications where a vertical cabinet with right-hand return airflow is required. Typical installations include multi-tenant buildings, hotels, and office spaces served by a shared water loop. The blower discharge configuration can be field-converted from end discharge to straight-through discharge, giving installing contractors flexibility when working within tight mechanical room layouts. The single-stage design simplifies controls integration and reduces commissioning time on water-loop projects.

Key Features

• 4-ton (48,000 BTU/h) capacity with R-454B low-GWP A2L refrigerant
• Vertical installation, right-hand return airflow configuration
• Scroll compressor standard for 024-and-up unit sizes
• Swing-open electrical box and slide-out blower for fast service access
• Water coil freeze protection for reliable performance across variable load conditions
• Field-adjustable blower discharge: end or straight-through conversion in minutes
• Galvanized steel cabinet with integrated sound package for reduced noise transmission

Compatibility

Designed for vertical water-source heat pump applications requiring right-hand return airflow on a shared hydronic loop system. Consult system loop design documentation to confirm entering water temperature range, flow rate, and loop sizing before installation.

Installation Notes

Installation must be performed by a licensed HVAC technician familiar with A2L refrigerant handling procedures, as R-454B is a mildly flammable refrigerant class. De-energize the unit and isolate the water loop before any service work. Verify local mechanical and electrical codes, including ASHRAE 15 and applicable IFGC requirements, for refrigerant room ventilation and leak detection. Do not attempt to field-convert refrigerant type or modify factory refrigerant circuit components.

Technical Specifications

• Capacity: 4 Ton (48,000 BTU/h)
• Refrigerant: R-454B (A2L, low GWP)
• Dimensions: 21.5 inches x 26 inches x 44.25 inches
• Weight: 255 pounds
• Cabinet Material: Galvanized steel
• Compressor Type: Scroll
• Staging: Single-stage
• Airflow Configuration: Vertical, right-hand return

Standard Information

• Brand: BOSCH
• Manufacturer Part Number: CL048-1VTC-LRT-PUA