Specifications

TROU BLE SHOOT ING
1. Checkout requires a handheld multimeter, 9V battery,
a 5.6k ohm .25 watt resistor, a 1.2k ohm .25 watt
resistor, a jumper wire with .25" quick connect
terminals, and the 620 ohm resistor that is
factory-installed across terminals SR+ and SR. The
terminal names below reference the economizer
controller. Use the following flowcharts for to diagnose
unit.
2.
a. Disconnect power to the unit.
b. Jumper P to P1 (factory installed jumper is
normally present).
c. Remove outdoor air enthalpy sensor from
terminals SO+ and SO and install the 1.2k ohm
resistor.
d. Put 620 ohm resistor across terminals SR+ and
SR (factory installed 620 ohm resistor is normally
present and can be used).
e. Put 5.6k ohm resistor across T and T1.
3.
a. Turn (EXH Set) Exhaust fan Setpoint
potentiometer fully CCW.
b. Turn (Min Pos) Minimum Outside Air Damper
potentiometer fully CCW.
c. Turn (DCV Max) Demand Control Ventilation
Maximum potentiometer fully CW.
d. Turn (DCV Set) Demand Control Ventilation
Setpoint potentiometer fully CCW.
e. Turn enthalpy potentiometer to "D".
7
Page 41