Mammoth 800 to 5500 CFM: Dedicated Outdoor Air System with Enthalpy Wheels (VHC) - Manual (Page 27)

MAMM-VHC-IOM-1A (JANUARY 2013) 27
Occupied Ventilation
Occupied ventilation is achieved by closing the occupancy
contact to the terminal interface shown in Figure F1. These
terminals require a dry contact which could be provided by
a number of types of controls such as a timer, light sensor,
occupancy sensor, Building Management System or other.
The unit will not operate unless these contacts are closed.
Occupied Timer Sensor
Occupied ventilation is achieved by connection to the
terminal interface shown in Figure F2. These terminals re-
quire a dry contact which could be provided by a number of
types of controls such as a timer, light sensor, occupancy
sensor, Building Management System, or other. The unit
will not operate unless these contacts are closed.
Unoccupied Recirculation
Supply fan recirculation for heating and cooling can be
achieved by connecting dry contact controls to the terminal
interface provided in the control panel area. This terminal
requires a dry contact closure from a field provided and
wired device.
Appendix F: Terminal Control Diagrams
301
302
304
305
305
306
307
308
320
321
322
323
324
325
374
375
376
377
OCCUPANCY
CONTACT
CR
Note: This is the only
connection needed to
start single-speed units.
Figure F1: Occupied ventilation for DDC controls package
and electro-mechanical controls (EMC)
301
302
304
305
305
306
307
308
320
321
322
323
324
325
326
327
328
329
1 2 3 4 5
12
6
9
Figure F2: Occupied ventilation for DDC controls package
and electro-mechanical controls (EMC)
301
302
304
305
305
306
307
308
320
321
322
323
324
325
326
327
328
329
UNOCCUPIED RECIRCULATION
CONTACT (OPTIONAL)
CR
Figure 10: Unoccupied recirculation for DDC controls units
IMPORTANT
DDC units can be turned on/off through software.