Jade Range W7220 Manual Do Utilizador

11

62-0331—07

Operation or Use My outdoor temperature 

reading on the STATUS menu is 

not accurate.

Check the sensor wiring. Enthalpy sensors are to be wired to the Sylk Bus terminals. 

Temperature sensors are to be wired to the OAT and MAT terminals. 

If my enthalpy sensor drifts in 

accuracy over time, can I re-

calibrate it? 

The sensors are not able to be re-calibrated in the field. However there is a menu item under 

the ADVANCED menu where you are able to input a limited offset in temperature and 

humidity for each sensor you have connected to the economizer. 

Can I go back to factory 

defaults and start over? 

Under the SYSTEM SETUP menu you can change the setpoints to the factory defaults.

Will I be able to see the LCD 

screen when it is in the unit? 

The LCD screen has a backlight that is always illuminated. 

What is a good setpoint for the 

Mixed Air Temperature (MAT)?

The mixed air temperature is the temperature of air that you want to supply to the space. In a 

commercial building, this is between 50 to 55°F (10 to 13°C). The mixed air is the mixing of 

the return air and the outdoor air. 

I am using enthalpy sensors. 

Why did the control ask me to 

input a dry bulb changeover 

temperature? 

In the event the humidity sensor in the enthalpy sensors fails, the backup algorithm in the 

control is to default to the temperature sensor in the enthalpy sensor. 

In checkout, the outdoor 

damper closes when I 

command it open. 

Check the actuator linkage or rotation. In the CHECKOUT mode, the outdoor damper should 

drive open or closed with the return air damper having the opposite effect. 

How do I set my minimum 

position? 

The minimum position is set using the VENTMIN and VENTMAX setup in the SETPOINTS 

menu. VENTMIN is the minimum ventilation required when using an occupancy sensor and 

VENTMAX is the minimum ventilation when not using an occupancy sensor for Demand 

Control Ventilation. The VENTMAX position is set the same as with the potentiometer on the 

analog economizers and is the output voltage to the damper actuator. The range is 2 Vdc 

closed OA damper and 10 Vdc open OA damper. 

What if my damper does not go 

completely closed in the 

checkout operation?

Check the damper linkage or hub to make sure the damper is able to close completely. 

How do I set the OCC? 

There are two settings for the OCC setting, INPUT and ALWAYS. INPUT is from the space 

thermostat, if it has an occupancy output. ALWAYS is the unit in the occupied mode, if the 

economizer is powered (fan on). 

Does the economizer save my 

program values if the unit loses 

power?

Yes, once the changes are stored in the controller they will be stored until they are changed 

by the operator. 

If the unit is left in checkout, 

how long will the unit stay in 

checkout mode without input?

The unit will remain in checkout for 10 minutes, then return to normal operation.