tekmar 553 Thermostat Installation User Manual

Page 8

553_D - 09/14

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A Watts Water Technologies Company

Testing tekmarNet

4 and Stand Alone Wiring

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Testing the Power
1. Remove the front cover from the thermostat.
2. Use an electrical test meter to measure (ac) voltage between the R and C terminals.

The reading should be 24 V (ac) +/– 10%.

3. Install the front cover.

Testing the Relay Outputs

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The thermostat includes a User Test to check if the thermostat’s relays are operating
and that the thermostat is wired correctly to the HVAC equipment. The User Test setting
can be located in the Toolbox menu. Either Heat or Cool test can be selected.
Cancel button - Exits the user test and returns the Toolbox menu.
Hold button - Pauses the user test step for up to 5 minutes.
Next Item button - Advances the user test to the next test step.

User Test Sequence

Heat Test

Cool Test

Step

Relay(s) Closed

Step

Relay(s) Closed

O RELAY ON

Rc to G/O

O RELAY OFF

Rc to G/O

B RELAY OFF

Rc to G/O

B RELAY ON

Rc to G/O

FAN ON

Rc to G/O
(conventional)
Rc to ACC
(heat pump)

FAN ON

Rc to G/O
(conventional)
Rc to ACC
(heat pump)

Y HEAT ON

Rc to Y

Y COOL ON

Rc to Y

W2 HEAT ON

Rc to ACC

HUMIDIFY ON

Rc to ACC

W HEAT

Rh to W

DEHUMIDIFY ON

Rc to ACC

HUMIDIFY ON

Rc to ACC
(heat and cool)
Rc to Y
(two-stage heat)

HRV ON

Rc to ACC

DEHUMIDIFY ON

Rc to ACC

HRV ON

Rc to ACC

*availability of test step and additional relay closures based upon Setup menu settings.