Settings – tekmar 368 Zone Control User Manual

Page 8

The following tests are to be performed using standard testing practices and procedures
and should only be carried out by properly trained and experienced persons.

A good quality electrical test meter, capable of reading from at least 0 — 200 V (ac) and at
least 0 — 2,000,000 Ohms, is essential to properly test the wiring and sensors.

Test the Sensors



In order to test the sensors and Room Temperature Units (RTUs), the actual temperature
at each sensor and RTU location must be measured. A good quality digital thermometer
with a surface temperature probe is recommended for ease of use and accuracy of
testing. Where a digital thermometer is not available, a spare sensor can be strapped
alongside the one to be tested and the readings compared. Test the sensors and RTU(s)
according to the instructions in the Data Brochures D 070, D 074 and D 054.

Test the Power Supply



Make sure exposed wires or bare terminals are not in contact with other wires or grounded surfaces. Turn on the power and measure
the voltage between the

Power N — L (3 and 4) terminals using an AC voltmeter. The reading should be between 110 and 130 V (ac).

Test the Outputs



System Pump

If a system pump is connected to the

System Pmp — System Pmp (1 and 2) terminals, make sure power to the terminal block is

off and install a jumper between the terminals. When the system pump circuit is powered up, the system pump should start. If the
pump does not turn on, check the wiring between the terminal block and the pump and refer to any installation or troubleshooting
information supplied with the pump. If the pump operates properly, disconnect the power and remove the jumper.

Zone Pump or Valve

• If a zone pump or valve is connected to the terminals

Com 1-2 —1 (15 and 16), make sure power to the pump or valve circuit is

off and install a jumper between the terminals

Com 1-2 —1 (15 and 16). When the zone circuit is powered up, the zone pump

should turn on or the zone valve should open completely. If this does not occur, check the wiring between the terminal and the
pump or valve and refer to any installation or troubleshooting information supplied by the manufacturer.

• If a zone pump or valve is connected to the terminals

Com 1-2 — 2 (15 and 17), follow a similar procedure as described above

for the zone 1 relay.

• If a zone pump or valve is connected to the terminals

Com 3-4 — 3 (18 and 19), follow a similar procedure as described above

for the zone 1 relay.

• If a zone pump or valve is connected to the terminals

Com 3-4 — 4 (18 and 20), follow a similar procedure as described above

for the zone 1 relay.

Connect the Control



• Make sure all power to the devices and terminal blocks is turned off and remove any remaining jumpers from the terminals.

• Reconnect the terminal blocks to the control by carefully aligning them with their respective headers on the control and then pushing

the terminal blocks into the headers. The terminal blocks should snap firmly into place.

• Install the supplied safety dividers between the unpowered sensor inputs and the powered 120 V (ac) or 24V (ac) wiring chambers.

• Do not apply power to the control until the adjustment dials and DIP switches are properly set for your application. See the Settings

section of this brochure for details on how to set the dials and DIP switches.

• Once the settings are complete, apply power to the control. The operation of the control on power up is described in the Sequence

of Operation section of this brochure.

Settings

Before adjusting the dial settings, read through the sequence of operation section of this brochure to ensure that you understand how
the control operates.

STEP SIX

ESSENTIAL CONTROL SETTINGS

UnOccupied

The

UnOccupied dial is used to set the desired temperature in selected zones during the

UnOccupied period.

Using the Internal 24 hr. Timer



First determine the length of time required for the UnOccupied period and turn the
UnOccupied Duration dial to the desired duration length. If the dial is set to 24 hours, the
368 remains in UnOccupied mode continuously. If the dial is set to 0 hours, the 368
remains in Occupied mode continuously.

13 14

Out

RTU

Zo
In

Com
Sen

RTU

UnO

Com
Sen

Ω

UnOccupied

Duration

Timer Active

24 hr. Timer

• Dial the desired duration of the
UnOccupied period.
• Press start button at the time of day
you want the UnOcc. period to begin.
Timer Active light turns on.

Start

0 = always Occupied
24 = always UnOccupied

12 hrs.

UnOccupied

Duration