Viessmann VITOCAL IND-C Cassette Ductless System

Key Features and Benefits

Low Sound Levels: Whisper quiet operation with no indoor compressors, minimizing noise disruption.

Secure Operation: Units are connected only by refrigerant piping and wiring, preventing intrusion through ductwork. Outdoor units can be placed close to exterior walls for protection.

Fast Installation: Simple to install with a mounting bracket for indoor units. Minimal disruption during installation.

Simple Servicing and Maintenance: Easy access to the control compartment and draw-thru outdoor section design for coil cleaning.

Built-in Reliability: Designed for years of trouble-free operation with protection against freeze-up and high evaporator temperatures.

Individual Room Comfort: Allows for individual room control, with an air sweep feature for optimal air mixing.

Economical Operation: Provides heating or cooling only where needed, reducing energy consumption.

Easy-to-Use Controls: Microprocessor-based controls with a user-friendly wireless remote control.

Factory Installed Condensate Lift Pump: Offers installation flexibility.

Agency Listings: AHRI and ETL certified.

Model Number Nomenclature

The model number indicates key features such as:

• DLF: Fan Coil Unit
• S & L: Model designation
• C: Indoor Fan Coil Type (Cassette)
• H: Indoor Fan Coil Type (Heat Pump)
• Capacity: Indicated by numbers (e.g., 09 for 3/4 Ton, 48 for 4 Ton)
• X: Not Used
• A: Variation
• K: Voltage (208/230-1-60)

Standard Features and Accessories

Indoor Unit Accessories

• Grille (Required for installation)
• Mounting Brackets
• Low Voltage Controls

Comfort Features

• Microprocessor Controls
• Wired Remote Control
• Wireless Remote Control
• Wi-Fi Remote Control
• Automatic Horizontal Air Sweep
• Air Direction Control
• Auto Restart Function
• Cold Blow Protection On Heat Pumps
• Freeze Protection Mode On Heat Pumps
• Turbo Mode
• Silence Mode
• Auto Changeover On Heat Pumps
• Follow Me

Energy Saving Features

• Sleep Mode
• Stop/Start Timer
• 46°F Heating Mode (Heating Setback)

Safety and Reliability

• Indoor Coil Freeze Protection
• Indoor Coil High Temp Protection in Heating Mode
• Aluminum Golden Hydrophilic pre-coated fins

Ease Of Service And Maintenance

• Cleanable Filters
• Diagnostics
• Liquid Line Pressure Taps
• Condensate Drain Adaptor

Application Flexibility

• Condensate Lift Pump

Accessories

Dimensions

Detailed dimensions for indoor units are provided in tables and diagrams for various sizes (9K through 48K).

Figure 4: Indoor Unit (Sizes 9-18) illustrates the unit dimensions and packaging details.

Figure 5: Indoor Unit (Sizes 24-48) provides detailed dimensions for larger units.

A table lists the dimensions (A, B, C, D) for capacities 24K, 36K, and 48K.

Clearances

Figure 6: Clearances shows the recommended installation clearances for the indoor unit, including supply and return air paths, and overhead clearance.

• Minimum 39.4 inches (1000mm) clearance around the unit.
• Minimum 3 feet (1 meter) for supply air.
• Maximum 16 feet (5 meters) for supply air.
• Minimum 10.2 inches (260mm) overhead clearance.
• Minimum 11.4 inches (290mm) overhead clearance.

Specifications

A comprehensive table details system specifications for both Cooling and Heat Pump modes across various sizes (9K to 48K).

Key specifications include:

• Electrical: Voltage, Phase, Cycle, MCA, Power Supply.
• Controls: Wireless and Wired Remote Controller availability.
• Operating Range: Cooling and Heating Indoor Dry Bulb (DB) Min-Max and Wet Bulb (WB) Min-Max.
• Piping: Pipe Connection Sizes (Liquid and Suction).
• Indoor Coil: Face Area, No. Rows, Fins per inch, Circuits.
• Unit Dimensions: Body and Panel Width, Height, Depth, and Net Weight.
• Number of Fan Speeds: 3
• Airflow: CFM values for Low, Medium, and High fan speeds.
• Air Throw Data: Maximum approximate air throw in feet (meters).
• Sound Pressure: Cooling and Heating Operation Indoor Sound Pressure in dBa (L/M/H).

Figure 10: Sound Pressure Testing Method illustrates the testing setup.

Fan and Motor Specifications

Detailed specifications for the indoor fan motor are provided, including:

• Material, Type, Diameter, Height, Model, Voltage, Phase, FLA, Insulation Class, Safe Class, Input/Output Power, Range of Current, Rated Current, Capacitor, Rated HP, Speed (RPM), and Max Input.

Wiring Diagrams

Wiring diagrams are provided for different unit sizes:

• Figure 11: Wiring Diagram (Sizes 9K-24K)
• Figure 12: Wiring Diagram (Sizes 36K-48K)

A table lists the function of various codes (CN1, CN3, etc.) corresponding to connections on the mainboard.

Guide Specifications

Part 1 - GENERAL

• 1.01 System Description: Indoor, in-ceiling cassette, direct-expansion fan coils matched with heat pump outdoor units.
• 1.02 Agency Listings: Rated per AHRI Standards 210/240.
• 1.03 Delivery, Storage, And Handling: As per manufacturer recommendations.
• 1.04 Warranty: For inclusion by specifying engineer.

Part 2 - PRODUCTS

• 2.01 Equipment:
• General: Indoor, direct-expansion, ceiling-mounted fan coil with cooling/heating coil, fan, motor, piping, electrical controls, microprocessor control system, and integral temperature sensing.
• Unit Cabinet: Zinc-coated steel, fully insulated, with high-impact polystyrene grilles.
• Fans: Centrifugal direct-drive blower with automatic, motor-driven vertical air sweep and adjustable louvers (2, 3, or 4-way discharge).
• Coil: Copper tube with aluminum fins, mechanically expanded, and golden hydrophilic pre-coated. Includes a drip pan with a factory-installed condensate lift pump.
• Motors: Open drip-proof, permanently lubricated ball bearing with inherent overload protection, 7-speed fan motors.
• Controls: Microprocessor-based system for temperature control, fan speed, and self-diagnostics. Wireless remote controller can act as the temperature sensing location.
• Functions: Automatic restart, 24-hour timer, temperature sensing, indoor coil freeze protection, wireless infrared remote control, automatic air sweep, dehumidification mode, fan-only operation, diagnostics, user-selectable fan speed (high, medium, low, auto), automatic heating-to-cooling changeover, and indoor coil high temperature protection.
• Filters: Factory-supplied cleanable filters.
• Electrical Requirements: Indoor fan motor operates on 208-230V. Power supplied from outdoor unit.
• Operating Characteristics: Minimum SEER and HSPF as listed on specifications table.
• Refrigerant Lines: Lines can be oriented for left, right, or back connection and must be insulated.