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ZONE OUTPUT (ZN OUTP)
The ZN OUTP adjustment in the Zone Adjust menu of the control selects the zoning device used for each zone, and affects the
operation of the system pump.
When PUMP is selected, the control assumes the device used to control the heat deliv-
ery is a pump. When the zone turns on, the control does not operate the system pump.
When VLV is selected, the control assumes the device used to control the heat delivery
is a fast acting spring return valve. When the zone turns on, the control turns on the
system pump.
When THRM is selected, the control assumes the device used to control the heat delivery is a slow acting zone valve with a
thermal actuating motor. When the zone turns on, the system pump is held off for a period of time to allow the thermal motor zone
valve to fully open. This time is adjustable through the thermal open (THRM OPEN) setting in the Control Adjust menu of the
control. The thermal close (THRM CLS) setting in the Control Adjust menu of the control sets the time required for the thermal
motor zone valve to close.
SYSTEM PUMP OPERATION
The system pump (Sys Pmp) contact is operated based on the zoning device(s) selected. Refer to the ZONE OUTPUT section
for system pump operation. The system pump is also operated based on the purge and exercise functions.
EXERCISING (EXERCISE)
The 369e has a built-in exercising function. The exercising period is adjustable and comes factory set at 70 hours. If the zoning
devices or the system pump has not been operated at least once during every exercising period, the control turns on the output
for 10 seconds. This minimizes the possibility of a pump or valve seizing during a long period of inactivity. The Test LED flashes
anytime the control is exercising.
Note: The zone relay exercising time is increased to the THRM OPEN setting if THRM is selected as the zoning device.
PURGING (PURGE)
The 369e includes a purging function which allows for any excess heat available in the boiler to be purged into the zones. The
369e removes the call for heat from the Integrated System Control some time before the zones are turned off. The purging time
is adjustable based on the PURGE setting in the Control Adjust menu of the control.
Section A2: One Stage Heating
ONE STAGE HEATING
A one stage heating zone has one RTU or indoor sensor controlling a
single heating terminal. One RTU or indoor sensor therefore controls
one output relay. If an RTU is used to control a one stage heating
zone, the RTU must be connected to a tN1 terminal. If an RTU is
connected to an even numbered tN1 terminal (i.e. tN1 2, tN1 4 or
tN1 6), ONE must be selected through the STG NUM adjustment in
the Zone Adjust menu of the control. If an indoor sensor is used to
control a one stage heating zone, the sensor can only be connected
to an Indr terminal (i.e. Indr 2, Indr 4 or Indr 6), and ONE must be
selected through the STG NUM adjustment in the Zone Adjust menu
of the control.
Example: An RTU connected between Com and tN1 1
terminals (20 and 21) is used to control the output relay Zn
1, and an RTU connected between Com and tN1 2 terminals
(20 and 22) is used to control the output relay Zn 2.
© 2003
D 369e - 06/03
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