Grain Systems PNEG-1711 - Manual (Page 16)

PNEG - 1711
Page 16 of 22 06/30/2009
Digital Thermostat Owner’s Manual
Table 3 - On / Off Controller States
Controller State Relay 1 Relay 2
On Closed (0 Ω) Closed (0 Ω)
Off Open (∞ Ω) Open (∞ Ω)
The default screen displays current state of controller, current sensor temperature, and current setpoint.
Figure 6 - Default On / Off Screen
3.3.3 Dryer / TopDry Operation (Grain Temperature / Moisture Control)
There are two states the controller can assume using Dryer / TopDry operation: Engaged and Disengaged.
Anytime the sensor temperature is below the setpoint minus the temperature differential, the Thermostat will be in the
“Engaged” state. If the sensor temperature rises above the setpoint plus the differential, the Thermostat will be in the
“Disengaged” state.
The relay position in each state is depicted below.
Table 4 - Dryer / TopDry Relay States
Controller State Relay 1 Relay 2
Engaged Closed (0 Ω) Closed (0 Ω)
Disengaged Open (∞ Ω) Open (∞ Ω)
The default screen displays the current setpoint on the top line and the current sensor temperature on the bottom line.
If the controller is in the “Engaged” mode, the current sensor temperature is displayed on the left side of the screen
(see Figure 7). If the controller is in the “Disengaged” mode, the current sensor temperature is displayed on the right
side of the screen (see Figure 8).