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Sequence of Operation
Section A
Heating
Operation
Page 5 - 7
Section A1: General Heating
POWERING UP THE CONTROL
When the Zone Control 369e is powered up, the control displays the control type number in the LCD for 2 seconds. Next, the
software version is displayed for 2 seconds. Finally, the control enters into the normal operating mode and the LCD defaults to
displaying the current outdoor temperature.
ZONING OPERATION
The 369e can directly control the temperature in up to six one stage heating zones, three two stage heating zones, or a com-
bination of one stage and two stage heating zones. In order to measure the indoor temperature, each zone requires either an
indoor sensor or an RTU. With RTUs, the desired zone temperature is set using the HEATING adjustment in the Adjust menu
of the RTU. If an indoor sensor is used, the desired zone temperature is set using the HEATING adjustment in the Zone Adjust
menu of the control.
HEATING CYCLE (HEAT CYC)
The 369e operation is based on a cycle length which is adjustable
through the HEAT CYC setting in the Control Adjust menu of the
control. During every cycle, the control turns on each zone relay for
a specific on time. The required on time is calculated based on the
PID response of the zone during the previous cycle period. If the
zone requires more heat, the on time is increased, and if the zone
requires less heat, the on time is reduced. In order to prevent short
cycling, the 369e ensures that the zone relays remain on or off for a
minimum amount of time.
PID Zoning Logic
Proportional (P)
Proportional control logic compares the actual zone temperature to the desired zone temperature. Zone relay on time is
based on the difference between the actual temperature and the desired temperature. As the zone temperature drops, the
relay on time increases, and as the zone temperature rises, the relay on time decreases.
Integral (I)
Integral control logic compares the actual zone temperature to the desired zone temperature over a period of time. The
longer the actual temperature is below the desired temperature, the longer the on time for the zone relay will be.
Derivative (D)
Determines how fast or how slow the actual temperature is changing.
P + I + D = PID
If proportional, integral and derivative (PID) control logic is used, the control is more able to prevent excessive temperature
swings and provide a stable room temperature under all conditions. It not only takes into account how much the room
temperature has dropped, but also how long there has been a droop and how fast the temperature is changing.
ZONE CONTROL LOAD STAGGERING AND SYNCHRONIZATION
The 369e staggers the operation of the zones in order to achieve a steady load on the boiler while preventing boiler short
cycling. Multiple Zone Controls can be daisy chained together to increase the number of zones. Each of the Zone Controls
synchronizes its zone operating cycles based on the input from the other Zone Controls. This results in a more stable system
flow rate and improved boiler operation. In order for Zone Control synchronization to work properly, the cycle length on each
Zone Control must be equal.
ZONE CONTROL OPERATION WITH A KANMOR INTEGRATED SYSTEM CONTROL
The 369e can provide indoor temperature feedback to a kanmor Integrated System Control. When multiple Zone Controls are
used, each zone control uses its Zo Out output to sequentially pass the information to the kanmor Integrated System Control.
The ZO OUT item displayed in the view menu represents the target from the zone with the highest heat requirement. The
kanmor Integrated System Control uses this target to determine the water temperature required to satisfy the zone with the
highest heat requirement.
Section B
Cooling
Operation
Page 7 - 8
Section C
Setback
(UnOccupied)
Page 9 - 10
Relay On Time
5 of 32
Section D
tN 1/2
Devices
Page 10 - 11
Cycle Length
Relay On Time
Less Heat
Relay On Time
More Heat
© 2003
D 369e - 06/03
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