Comfort-Aire VCD-Series: Extreme Performance Cold Weather Heat Pump
Enjoy ultimate comfort and efficiency with the VCD-Series cold-climate air source heat pump. Featuring an inverter-driven compressor, the VCD-system modulates to use minimal energy while maintaining optimal temperature, sound levels, and comfort. Its hyper heat performance down to -22°F (-30°C) ensures world-class operating parameters in all weather conditions, with optional electric auxiliary heat kits for added peace of mind.
Key Features
- Aluminum-alloy traditional fin-and-tube coil construction for maximum durability and corrosion resistance.
- Efficient and quiet ECM blower motor.
- Accepts traditional 24VAC thermostats for convenient and advanced control options.
- Wired programmable control included.
- Optional electric resistance heat kits (up to 25kW) provide auxiliary heat for the coldest conditions.
- Durable gloss enameled-steel construction with insulated interior for less than 2% cabinet leakage.
- Built-in return filter rack with specific sizes: 24K models use 16"x20"x1", 30-48K models use 20"x20"x1", and 60K models use 24"x20"x1".
- Multi-position air handler.
Performance Specifications
Cooling Operating Range: -22°F (-30°C) to 122°F (50°C)
Heating Operating Range: -22°F (-30°C) to 75°F (24°C)
Model Capacities
Available in five models ranging from 2 to 5 Tons (24,000 to 60,000 BTUH).
Ducted Units - Technical Data
| Feature | B-VCD24SA-1 | B-VCD30SA-1 | B-VCD36SA-1 | B-VCD48SA-1 | B-VCD60SA-1 |
|---|---|---|---|---|---|
| Power Supply | 208/230, 1, 60 Hz | 208/230, 1, 60 Hz | 208/230, 1, 60 Hz | 208/230, 1, 60 Hz | 208/230, 1, 60 Hz |
| Voltage Range | 187-253 V | 187-253 V | 187-253 V | 187-253 V | 187-253 V |
| Cooling Capacity (Btu/h) | 24,000 (6,400~27,000) | 30,000 (10,000~33,600) | 36,000 (13,000~47,400) | 47,000 (15,000~48,000) | 55,000 (14,000~56,000) |
| Heating Capacity (Btu/h) @ 47°F | 24,130 | 28,550 | 38,890 | 47,060 | 51,981 |
| Indoor Noise Level (Hi/Mi/Lo) dB(A) | 39/36/33 | 42/40.5/36.5 | 45/43/41 | 50/47/43.5 | 51/45.5/41.5 |
| Refrigerant Piping (Liquid/Gas) | 3/8" / 3/4" | 3/8" / 3/4" | 3/8" / 3/4" | 3/8" / 3/4" | 3/8" x 7/8" |
| Thermostat Type | Standard / Programmable Wired Controller | Standard / Programmable Wired Controller | Standard / Programmable Wired Controller | Standard / Programmable Wired Controller | Standard / Programmable Wired Controller |
| Application Area (Cooling Standard) sq.ft. | 344.44~505.90 | 430.56~635.07 | 516.67~753.47 | 688.89~1011.81 | 861.12~1270.14 |
Auxiliary Heat Kits
| Model | Power of Electric Heater | Number of Circuits | Circuit 1 MCA | Circuit 2 MCA | Circuit 3 MCA | Circuit 1 Max. Fuse | Circuit 2 Max. Fuse | Circuit 3 Max. Fuse | Model Size Selection (Btu/h) | 8kW | 10kW | 15kW | 20kW | 25kW |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ECD8KW | 8kW | 1 | 208/230V 37A/42A | - | - | 40A/45A | - | - | 24K | Yes | Yes | Yes | - | - |
| ECD10KW | 10kW | 1 | 208/230V 46A/53A | - | - | 50A/60A | - | - | 30K | Yes | Yes | Yes | - | - |
| ECD15KW | 15kW | 2 | 208/230V 23A/27A | 46A/53A | - | 25A/30A | 50A/60A | - | 36K | Yes | Yes | Yes | Yes | - |
| ECD20KW | 20kW | 2 | 208/230V 46A/53A | 46A/53A | - | 50A/60A | 50A/60A | - | 48K | Yes | Yes | Yes | Yes | - |
| ECD25KW | 25kW | 3 | 208/230V 23A/27A | 46A/53A | 46A/53A | 25A/30A | 50A/60A | 50A/60A | 60K | Yes | Yes | Yes | Yes | Yes |
Dimensional Drawings - Indoor Units
| Model (Btu/h) | Dimension | 24K (mm) | 24K (inch) | 30K~48K (mm) | 30K~48K (inch) | 60K (mm) | 60K (inch) |
|---|---|---|---|---|---|---|---|
| Length of A | mm | 1143 | 45 | 1245 | 49 | 1346 | 53 |
| Length of B | mm | 533 | 21 | 533 | 21 | 533 | 21 |
| Length of C | mm | 445 | 17-1/2 | 534 | 21-1/50 | 622 | 24-1/2 |
| Length of D | mm | 400 | 15-3/4 | 490 | 19-5/16 | 580 | 22-27/32 |
| Length of E | mm | 260 | 10-1/4 | 260 | 10-1/4 | 260 | 10-1/4 |
Horizontal Installations Plenum Clearances: Minimum clearance of 25.4mm (1") all sides. The outlet side pipe length is 1.5m/59”.
Vertical Installations: Diagram shows typical vertical configurations.
Outdoor Unit Specifications
| Feature | A-VCD24SA-1 | A-VCD30SA-1 | A-VCD36SA-1 | A-VCD48SA-1 | A-VCD60SA-1 |
|---|---|---|---|---|---|
| Power Supply | 208/230V, 1Ph, 60Hz | 208/230V, 1Ph, 60Hz | 208/230V, 1Ph, 60Hz | 208/230V, 1Ph, 60Hz | 208/230V, 1Ph, 60Hz |
| Cooling Capacity (BTUH) | 24,000 | 30,000 | 36,000 | 47,000 | 55,000 |
| SEER2 | 17.4 | 16.2 | 16 | 15.6 | 15.3 |
| EER2 | 11.7 | 10.0 | 10.0 | 8.2 | 8.8 |
| HSPF4.2 | 10 | 8.9 | 9.5 | 9.4 | 9.4 |
| COP | 3.35 | 3.30 | 3.36 | 3.15 | 3.42 |
| Cooling Amps | 9.10 | 13.20 | 15.97 | 24.95 | 27.40 |
| Heating Capacity (BTUH) @ 47°F | 24,000 | 33,000 | 40,000 | 50,000 | 59,000 |
| Heating Amps | 9.30 | 13.30 | 15.0 | 21.20 | 22.0 |
| Outdoor DBA | 62 | 60.5 | 64 | 64 | 63.5 |
| Width (inches) | 37.24 | 37.24 | 37.48 | 37.48 | 37.48 |
| Height (inches) | 31.89 | 31.89 | 52.48 | 52.48 | 52.48 |
| Depth (inches) | 16.14 | 16.14 | 16.34 | 16.34 | 16.34 |
| Net Wt/Shipping Wt (lbs.) | 136.69/159.83 | 227.07/220.24 | 239.86/271.61 | 239.86/271.61 | 239.86/271.61 |
| Min. Circuit Ampacity | 20.5 | 23 | 41 | 42 | 42 |
| Max. Fuse/HACR Circuit Breaker | 35 | 35 | 50 | 50 | 60 |
| Indoor/Outdoor Connecting Cable Type | 14AWG/4 conductor 600V THHN unshielded stranded bare copper | ||||
| LINE SETS O.D. (inch) | 3/8 x 3/4 | 3/8 x 3/4 | 3/8 x 3/4 | 3/8 x 3/4 | 3/8 x 7/8 |
| Max. Line Set Length¹ | 164 | 213 | 213 | 213 | 213 |
| Max. Elevation (outdoor)² | 82 | 98 | 98 | 98 | 98 |
Notes:
- For alternative line set sizes, refer to the VCD Vapor Line Sizing Chart.
- Always follow local, state, and national electrical codes.
- A minimum 10 ft. line set is recommended.
- Oil traps should be installed every 16.5 to 23 feet (5-7m) when the outdoor unit is installed above the indoor unit.
Outdoor Unit Dimensional Drawings
Outdoor Unit Dimensions - 24K & 30K: Detailed diagrams showing width, height, and depth with specific measurements in inches and millimeters.
Outdoor Unit Dimensions - 36K - 60K: Detailed diagrams showing width, height, and depth with specific measurements in inches and millimeters.
Coils
| Model | Width (in.) | Depth (in.) | Height (in.) | Weight (lbs.) |
|---|---|---|---|---|
| MCD18/24B1A | 17-1/2 | 21 | 18 | 52 |
| MCD30/36C1A | 21 | 21 | 24 | 76 |
| MCD48C1A | 21 | 21 | 24 | 77 |
| MCD60D1A | 24 | 21 | 28 | 95 |
Note: AHRI combinations with MCD-Series Coils and VCD systems are “coil-only” matches, and may result in lower SEER2, EER2, and HSPF2 ratings compared to matching air handlers. Review the latest matching information on www.marsdeliversratings.com before installation.
Compliance Information
This product complies with all California product labeling laws, including the Safe Drinking Water and Toxic Enforcement Act of 1986, commonly known as Proposition 65.
