Mammoth 800 to 5500 CFM: Dedicated Outdoor Air System with Enthalpy Wheels (VHC) - Manual (Page 9)

MAMM-VHC-IOM-1A (JANUARY 2013) 9
This must come from an optional thermostat or humidistat.
The unit will run in recirc mode upon a call.
Occupied Recirculation (Or) (DDC Control Package
only)
If the occupied recirculation contact closes or a jumper is
placed across terminals, heat wheel starts (not in free cool-
ing), defrost recirculation damper closes (if equipped), out-
side and exhaust air dampers (if equipped) begin to open;
after outside air damper opens fully the supply blower
starts; after exhaust air damper opens fully the exhaust
blower starts, the occupied recirculation damper opens and
outside and exhaust dampers modulate to the minimum
setpoints.
Unoccupied (Un)
If the contact opens or jumper removed on any of the ter-
minals 304, 305, 306, 307 or 308 the unit will turn off.
PNL
FW
PNL
FW
Figure 2: Possible terminal strip locations in electrical panel