tekmar 370 House Control User Manual

Page 18

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System Pump

• The relay contacts between

Sys Pmp—Power L (1 and 3) are closed and the system pump should

be turned on.

Boiler

• The relay contacts between

Boiler — Boiler (18 and 19) are closed and the boiler should be turned on.

Zone 1 / Cooling

• The relay contacts between

Com 1-2— 1 (24 and 25) are closed and the device connected to this relay

should be turned on.

Zone 2

• The relay contacts between

Com 1-2— 2 (24 and 26) are closed and the device connected to this relay

should be turned on.

Zone 3

• The relay contacts between

Com 3-4— 3 (27 and 28) are closed and the device connected to this relay

should be turned on.

Zone 4

• The relay contacts between

Com 3-4— 4 (27 and 29) are closed and the device connected to this relay

should be turned on.

% full output lights

• These lights indicate the percentage of full speed the variable speed injection pump is operating at.

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 370. When the control is flashing an Error Message, identify the fault from the

look-up table on page 18 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 Outdoor Sensor fault occurs, the 370 assumes a fixed outdoor temperature of 32

°F (0°C) and will regulate the supply water

temperature accordingly. An error message is displayed.

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

Zo - in short circuits, the 370 operates as if that RTU or Zone Control

is not connected. An error message is displayed.

• If the enclosure overheats, the 370 turns off the variable speed injection pump and displays an error message until it cools off.

• If an internal control fault occurs, the 370 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.

During Mixing Operation

• If a Supply Sensor fault occurs, the 370 displays an error message and turns the variable speed injection pump off.

• If a Boiler Sensor fault occurs and the

Min. Boiler dial is not in the Off position, the 370 displays an error message and turns the

Boiler relay off.

During Boiler Operation

• If a Boiler Sensor and a Supply Sensor fault occur, the 370 displays an error message and turns the

Boiler relay off.

Adjustment of Settings

• If the outdoor air temperature is near the

Occupied dial setting and the rooms are cold, increase the Occupied dial setting. If the

rooms are too hot, decrease the

Occupied dial setting.

• If the outdoor air temperature is cold and the rooms are cold, increase the

Heating Curve dial setting by 0.1 per day.

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

Testing