Copyright © D 369 -10/00
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Adjust
Zone
1
20 21
Com tN1
1
tN1
2
22 23
Indr
2
Item
Menu
Item
Menu
View
1
°
F
UnOcc
View
1
°
F
UnOcc
8
7
6
Zn
1
C
R
Com
1-2
Zn
2
M
M
ZONE CONTROL OPERATION WITH A TEKMAR OUTDOOR RESET CONTROL
The 369 can provide indoor temperature feedback to a tekmar Reset Control. When multiple Zone Controls are used, each zone
control uses its
Zo Out output to sequentially pass the information to the tekmar Reset Control. The ZO OUT item displayed in the
view menu represents the target from the zone with the highest heat requirement. The tekmar Reset Control uses this target to
determine the water temperature required to satisfy the zone with the highest heat requirement.
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
delivery 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 369 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 369 includes a purging function which allows for any excess heat available in the boiler to be purged into the zones. The 369 removes
the call for heat from the reset 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.
- 01/09
- 01/09
