Testing the control functions – tekmar 368 Zone Control User Manual

Page 9

Press the

Start button at the desired starting time for the UnOccupied period. Once the Start button is pressed, the 368 enters the

UnOccupied period at the same starting time each day.

Example The user wants an UnOccupied period starting at 10 pm and ending at 6 am. The

Unoccupied Duration dial is set to 8 hours

and the

Start button is pushed at 10 pm. Once the Start button is pushed, the control goes into UnOccupied mode from

10 pm until 6 am the next morning. This cycle is repeated 7 days a week.

DIP Switch Settings



Occ / UnOcc — Occ. Only

Each zone can be selected to operate in either Occupied only mode or both Occupied
and UnOccupied modes. If the DIP switch is set to

Zone 1 Occ. only, the zone

connected to relay

1 remains in Occupied mode at all times. If the DIP switch is set to

Zone 1 Occ / UnOcc, zone 1 is switched into UnOccupied mode each time the 368
receives an UnOccupied signal. Zones

2, 3, and 4 are set in a similar manner to that

described above for zone 1. If Two Stage zones are used, the DIP switches for both
output relays should be set to the same postion.

Optimum Start

The Optimum Start / Stop feature is used during transitions between the UnOccupied
mode (Night Setback) and the Occupied mode. When the DIP switch is set to

Optimum

Start, the 368 raises the building temperature during the final stages of the UnOccupied
period. This helps ensure the building is at the Occupied temperature as soon as the
Occupied period begins. If the

Optimum Start DIP switch is set to Off, the 368 does not

start raising the building temperature until the UnOccupied period ends. More informa-
tion on the Optimum Start feature is provided on page 3 of this brochure.

Thermal Motor

Zone valves with thermal actuating motors have long opening and closing times. In
order for the 368 to compensate for these longer times, the DIP switch should be set
to

Thermal Motor. If fast acting electric motor zone valves or zone pumps are used, the

DIP switch must be set to

Off.

Testing the Control Functions

STEP SEVEN

OPERATIONAL TEST OF CONTROL FUNCTIONS

The Zone Control 368 has a test routine which is used to test the main control functions. The 368 continually checks the sensors and
displays an error message whenever a fault is found. See page 11 for the list of error messages. When the

Test button is pushed, the

Test light is turned on. The Heat Required, and Optimum Start / Stop lights are turned off and the individual outputs and relays are tested
in the following test sequence.

Test Sequence



Each step in the test sequence lasts 10 seconds. At the end of each step, the device
continues to operate until it is turned off in a later step.

During the test routine, the test sequence can be paused by pressing the

Test button. The

test sequence remains paused at that point for up to 5 minutes. If the

Test button is not

pressed again while the test sequence is paused, the control exits the entire test routine.
Once the test sequence is paused, the

Test button can be pressed again to skip to the

next step. This can also be used to rapidly skip through the test sequence. To reach the
desired step, repeatedly press and release the

Test button until the appropriate device

and indicator light turn on.

Step 1 - The System Pump relay is turned on.

Step 2 - If the Com 3-4 common block is used for a single One Stage zone, the control

turns on relay

3 for 10 seconds.

- If the

Com 3-4 common block is used for two One Stage zones, the control turns

on relay

4 for 10 seconds and then turns off relay 4 and turns on relay 3 for

10 seconds.

- If the

Com 3-4 common block is used for a Two Stage zone, the control turns

on relay

3 and then, after 10 seconds, turns on relay 4 as well.

- If an RTU is not connected to

RTU 3 or RTU 4, the control skips this step.

Step 3 - The control tests relays 1 and 2 using the procedure described in Step 2.

Occ/UnOcc

Occ. only

Zone 1

2 3

Off

Thermal Motor

Off

Optimum Start

Test

System Pump

Zone 2 / Hi stage

Zone 3 / Lo stage

Zone 4 / Hi stage

Zone 1 / Lo stage