Mars Comfort-Aire Century VCD Series Quick Start Manual

VCD-Series Quick-Start Addendum
20
FOR MOST INSTALLATIONS (Read all steps before installation – not necessarily in order)
1. CONFIRM PROPER CHARGE, AIRFLOW, SYSTEM ORIENTATION - The VCD-Series of inverter
heat pumps are designed and manufactured to meet specific levels of AHRI-Rated efficiency when
matched with appropriate Air Handlers and Coils. Failure to confirm may reduce energy efficiency,
shorten equipment life, and cause nuisance service calls. Follow IOM information to ensure Air
Handlers and Multiposition Coils are oriented in the right direction for airflow and drainage.
•
Systems are pre-charged for 25' of line set. Add 0.69oz per foot of additional line set beyond the
factory-charged 25' length.
•
For Systems utilizing outdoor VCD heat pump systems without the factory match air handler, ensure
airflows are nominal to the specific cfm rates in the tables provided in the IOM manual. This includes
any furnace used with the match MCD-Series coil, or any other non-OEM air handler.
2. HIGH-VOLTAGE WIRING – The VCD-Series outdoor unit requires a dedicated 208/230V-1PH circuit,
please refer to the specifications or IOM for minimum ampacity and maximum fuse. The VCD air
handler requires another separate dedicated 208/230V-1PH circuit OR can be powered by the Auxiliary
Heat Kits (sold separately) if necessary. See diagrams below, or for air handler/aux heat single point
connections, please review information and diagrams on page 8. Please refer to the specifications or
IOM for minimum ampacity and maximum fuse.
VCD Air Handler
3. CHOOSE CONTROL AND WIRING STRATEGY – The VCD-Series can be uniquely fitted to a variety
of control options, with designated specific wiring required.
A) Complete VCD System + Proprietary Programmable VCD Controller
VCD Controller
18/2 Stranded Shielded Recommended
*Non-Polarity Sensitive HA/HB Terminals
*See Low-Voltage Connections on pgs. 4-5
VCD Outdoor
*Note: Termination may vary by model year
18/2 Stranded Shielded Recommended
*See Low-Voltage Connections on pgs. 4-5
VCD Air Handler
1
Unit
VCD Outdoor HP
*S1 / S2 Terminals
10/2024