Automated Logic RC642D

61
T
AI - Zone temp
AO - Heating valve
HWS
HWR
M
Hardware Points
Point Name
AI
BI
BO
AO
I/O #
Comments
Zone temp X Internal
Hot water valve X AO-2
Open hot water
valve
X DO-4 (W1) Optional – 120 sec floating
motor output. Use this point
OR
Close hot water
valve
0–10 Vdc analog output.
X DO-5 (W2) Optional – 120 sec floating
motor output. Use this point
OR 0–10 Vdc analog output.
Run conditions - scheduled
User-defined schedules determine when the unit runs in:
• Occupied Mode
The unit maintains a 70°F (21°C) adjustable heating setpoint.
• Unoccupied Mode (night setback)
The unit maintains a 55°F (13°C) adjustable heating setpoint.
Hot water valve
The Room Controller measures the zone temperature and modulates the heating coil
valve to maintain heating setpoint. Heating is enabled when the zone temperature is
below heating setpoint.
#6: Convective/fin tube heater
Control schematic
Point list
Sequence of
operation