tekmar 368 Zone Control User Manual

Page 10

Step 4 - After the test sequence is complete, the Test light begins flashing and the control enters a fast mode of operation. During

this time, the control is more responsive to setting adjustments. If the dial on an RTU is turned up, the on time of the zone
relay increases immediately. After fifteen minutes, the control reverts back to normal operating conditions and the on times
are based on the average temperature during the previous 15 minute cycle.

Manual Test



While the control is in the fast mode of operation and the

Test light is flashing, check that

each RTU operates the proper zone valve or zone pump. Turn up the

RTU dial to turn the

zone on, turn the dial down to turn the zone off. If an Indoor Sensor is used, a cold spray
to the sensor will turn the zone on.

Indicator Lights “On”



Power

• 120 V (ac) power is applied to the control and the control

is energized.

Heat Required

• The 368 is sending a heat required signal to a tekmar reset control. At least one of the heating zones

requires heat.

System Pump

• The relay contact between

System Pmp—System Pmp (1 and 2) is closed and the System Pump should

be turned on.

Zone 1 / Lo Stage

• The relay contact between

Com 1-2— 1 (15 and 16) is closed and the device connected to this relay

should be turned on.

Zone 2 / Hi Stage

• The relay contact between

Com 1-2— 2 (15 and 17) is closed and the device connected to this relay

should be turned on.

Zone 3 / Lo Stage

• The relay contact between

Com 3-4— 3 (18 and 19) is closed and the device connected to this relay

should be turned on.

Zone 4 / Hi Stage

• The relay contact between

Com 3-4— 4 (18 and 20) is closed and the device connected to this relay

should be turned on.

Test

• The control is proceeding through the programmed test sequence.

Occupied

• The control is in Occupied mode.

UnOccupied

• The control is in UnOccupied (Night Setback) mode.

Optimum Start / Stop

• The control is warming the building up during the final stages of the UnOccupied period, or the heating

system is turned off during the final stages of the Occupied period.

Timer Active

• The timer is set to enter the UnOccupied mode every 24 hours at the time of day the

Start button was

pressed.

STEP EIGHT

TROUBLESHOOTING

As in any troubleshooting procedure, it is important to isolate a problem as much as possible before proceeding. The Error Messages
and

Test button greatly simplify troubleshooting of the 368. When the control is flashing an error message, identify the fault from the

look-up table on page 11 and follow standard testing procedures to confirm the problem. If you suspect a wiring fault, return to steps
three, four and five, and carefully check all external wiring and wiring connections.

Sensor and Internal Faults

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

• If an RTU / Indoor Sensor fault occurs or an external Zone Control input

Zo - in short circuits, the 368 operates as if that RTU or

Zone Control is not connected. An error message is displayed.

• If an internal control fault occurs, the 368 displays an error message. Press the

Test button to clear the error message. If the error

message remains, the control must be returned for repair.

STEP NINE

BEFORE YOU LEAVE

• Make sure the wiring safety dividers are installed in their proper locations between compartments with different voltages.

• Install the wiring cover over the wiring chamber and secure it to the base with the two screws provided. Place the front cover on the

control and snap it into place. Install a lock if security is required.

• A sticker has been provided with the control. It is designed to be placed over the Zone 1 ... Zone 4 words

so that the zone names can be written onto the control.

• Place this brochure, and all other brochures relating to the installation, in the protective plastic bag supplied

with the control.

• Place the bag in a conspicuous location near the control for future reference.

• It is important to explain the operation of the control to the end user and to anyone else who may be operating

the system.

Zone 3

Zone 2

Zone 4

Zone 1 /
Cooling

Bed

Living

Kitchen

Adjusting RTU settings provides an immediate

response for the first 15 minutes only.

Test