Honeywell EXCEL 5000 User Manual page 164

ALPHABETIC REFERENCE
Adapted Heating Curve
74-5577–33 (US)
EN2B-0184 GE51 R0518 (Europe)
• actual setpoint
• next setpoint
• time until next setpoint
The EOH3 function gets these values via the datapoint connected to the input TSet
during processing.
If the "EOH / EOV Optimization" option is inactive (Analog Value properties), the
heating curve calculates the heating supply air temperature setpoint using the room
temperature setpoint.
The heating curve in EOH3 is automatically adapted if the internal and external
adaptation (input AdaEn) conditions are fulfilled, see section "Heating Curve
Adaptation".
Inputs Six analog inputs where:
TSet (X1) = Room temperature setpoint via a user address.
Must Do ⇒
TRm (X2) = Room temperature, active if TRmOvr = 999
TRmOvr(X3) = Room temperature setpoint from overrides like wall module,
extended operation button, summer or holiday switch.
TOat (X4) = Outdoor air temperature
OptEn (X5) = Optimization mode
• 0;1 = no optimization
• 2 = optimum start
• 3 = optimum stop
• 4 = optimum start and stop
AdaEn (X6) = Heating curve adaptation; 0 = disable; 1 = enable
Toff (Excel Web II: X7) = control point adjustment – from the setpoint wheel of a wall
module [-7, 7].
Outputs Four digital outputs, one analog output (minimum requirement), where:
TSup (Y1) = Supply water temperature setpoint
Start (YD2) = Optimum start goes to logic 1 during the preheating time
Stop (YD3) = Optimum stop goes to logic 1during the early setback time
Mode (YD4 = Operating mode
The following operating modes are possible:
0 Initialization phase
1 Unoccupied mode
2 Occupied mode
(Excel Web II only)
The input TSet/ X1 datapoint must be assigned to a time
schedule so that EOH3 can access occupancy start/ stop times.
You must enable the "EOH / EOV Optimization" option (Analog
Value properties); it defaults to ´disabled`.
The input TRm will be used only if TRmOverr = 999, otherwise
the input TRmOverr will be the room temperature setpoint (<>
999 if override, = 999 if no override). There will be no optimum
start/ stop optimization during room temperature setpoint
override.
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