12
2. DIFFERENTIAL ENTHALPY
—Execure step one, Checkout Preparation.
Execure step one, Checkout Preparation.
Execure step one, Checkout Preparation.
Execure step one, Checkout Preparation.
Execure step one, Checkout Preparation.
Turn DCV MAX to mid position.
Place 620 ohm resistor across S
O
and + (white sleeve resistor
makes OA enthalpy low).
—
Place 1.2K ohm resistor across S
R
and + (purple sleeve resistor
makes RA enthalpy high).
Free cool LED turns on; motor drives to approximately 45
degrees (half) open.
Free cool LED turns on; motor drives to approximately 45
degrees (half) open.
Remove 620 ohm resistor from S
O
and +. Free cool LED turns off; motor drives closed.
Free cool LED turns off; motor drives closed.
3. SINGLE ENTHALPY
—
Turn DCV MAX to mid position.
Turn DCV MAX to mid position.
Set enthalpy potentiometer to A (fully CCW).
Set enthalpy potentiometer to D (fully CW).
4. DCV AND EXHAUST
—
LED for both DCV and Exhaust should be off.
Motor drives to mid position, 45 degrees open.
Motor drives fully open.Turn MIN POS fully CW.
Turn MIN POS and DCV MAX to fully CCW.Motor will drive closed
Motor will drive closed
Turn DCV MAX to mid position.
Connect 9V battery positive to AQ and negative to AQ1.
LED for both DCV and Exhaust turn on.
Actuator drives to 45 degrees open.
Remove jumper from N terminal (economizer goes into not occupied mode).
Motor remains at 45 degrees open.
Motor will move to position set by DCV MAX pot.
Adjust DCV MAX towards CW
Adjust DCV MAX to fully CCW.
Reconnect jumper to N terminal.
Motor will drive to the most open position of the pots.Adjust DCV MAX and MIN POS pots.
Adjust DCV MAX and MIN POS pots to fully CCW..
Remove power from N terminal adjust MIN POS towards CW.Motor should not move.
Motor will move to position set by DCV MAX pot.
Adjust DCV MAX towards CW.
5. MINIMUM AND MAXIMUM POSITION
—
Connect 9V battery positive to AQ and negative to AQ1. Adjust
DCV MAX potentiometer to mid position.
DCV LED turns on. Actuator drives to 45 degrees open..
Turn DCV maximum position potentiometer to fully CCW. Actuator drives fully closed.
Actuator drives to 45 degrees open.
Actuator drives fully open.
Actuator drives fully closed.
Actuator drives fully closed.
Actuator drives fully closed.
.
Turn minimum position potentiometer to midpoint.
Turn minimum position potentiometer fully CW.
Turn MIN POS to fully CCW.
W7212: Remove jumper from TR and N.
6. MIXED AIR INPUT
—
Tu
rn DCV MAX to mid position; set enthalpy potentiometer to A.
Free cool LED turns on.
Actuator drives to 45 degrees open..
Remove 5.6K ohm resistor (green sleeve) and place jumper from T and T1.
Actuator drives to 45 degrees open..
Remove jumper from T and T1 and leave open.
Checkout Procedure Step Proper Response
Table 7. Checkout for Economizer (Continued)
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