Installation – tekmar 356 Mixing Control User Manual

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Installation

CAUTION

Improper installation and operation of this control could result in damage to the equipment and possibly even personal injury. It is
your responsibility to ensure that this control is safely installed according to all applicable codes and standards. This electronic
control is not intended for use as a primary limit control. Other controls that are intended and certified as safety limits must be placed
into the control circuit.

STEP ONE

GETTING READY

Check the contents of this package. If any of the contents listed are missing or damaged, please contact your wholesaler or tekmar
sales representative for assistance.

Type 356 includes:

One Mixing Control 356, One Outdoor Sensor 070, Two Universal Sensors 071, Data Brochures D 356,
D 070, D 001, Application Brochure A 356, Essay E 021.

Note: Carefully read the details of the Sequence of Operation to ensure that you have chosen the proper control for your application.

STEP TWO

MOUNTING

The control is mounted in accordance with the instructions in the Data Brochure D 001.

STEP THREE

ROUGH-IN WIRING

The variable speed injection pump wiring terminates in the electrical box. All other wiring terminates in the two wiring chambers on the
control. Determine whether the low voltage wiring enters the wiring chamber through the back or the bottom of the control. The wiring
is roughed-in to the electrical box prior to installation of the control (see Brochure D 001). Standard 18 AWG solid wire is recommended
for all low voltage wiring, and multi-strand 16 AWG wire is recommended for 120 V (ac) wiring.

Power must not be applied to any of the wires during the rough-in wiring stage.

• Install the Outdoor Sensor 070, Boiler Sensor 071, and Mixing Sensor 071 according to the instructions in the Data Brochure

D 070, and run the wiring back to the control.

• Run wire from the boiler to the control.

• Run wires from the 24 V (ac) power to the control. Use a clean power source to ensure proper operation.

STEP FOUR

TESTING THE WIRING

No wires should be connected to the control during testing.

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 - 300 V (ac) and at least 0 - 2,000,000 Ohms, is essential to
properly test the wiring and sensors.

Test The Sensors

Ensure the sensor wires are not connected to the control terminals before testing. In
order to test the sensors, the actual temperature at each sensor location must be
measured. A good quality digital thermometer with a surface temperature probe is
recommended for ease of use and accuracy. 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 according to the instructions in the Data Brochure D 070.

Test The Power Supply

Make sure exposed wires and bare terminals are not in contact with other wires or
grounded surfaces. Turn on the power and measure the voltage across the 24 V (ac)
power supply with an AC voltmeter. The reading should be between 22 and 26 V (ac).

24 V (ac)

Class II

Transformer

Ω

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