Carrier 33CS450-01 Explanation of Jumper Settings continued, Page, Carrier, Econ Jumper Setting

Carrier

Explanation of Jumper Settings (continued)

ECON JUMPER SETTING

If the jumper for MISC2 or MISC3 is set to ECON, the corresponding MISC screw terminal on the backplate will be connected to an economizer.

ECONOMIZER OPERATION - If your HVAC unit is equipped with an economizer system, the thermostat will provide power to the MISC2 or MISC3 terminal of the thermostat when the thermostat is in an occupied time period. The MISC2 or MISC3 terminal will be de-energized when the thermostat is in an unoccupied time period.

Y2 JUMPER SETTING

If the jumper for MISC1 is set to Y2 the MISC1 screw terminal on the backplate will control a second stage of cooling.

Y2 OPERATION - SECTION 13

Control up to two Cool stages.

The 2nd Stage of cool is turned on when:

(A) The 1st Stage has been on for the time required (step #27, page 13.6). It is adjustable from 0-60 minutes and the default is two minutes.

And

(B) The temperature spread from the setpoint is equal to or greater than: the setpoint plus the deadband (step #24, page 13.5), plus the 2nd deadband (step #25, page 13.5). This 2nd deadband is adjustable from 0-10 degrees and the default is two degrees.

21

	Cooling
Deadband	Deadband
db 1	db 2
(adj. 1-6 )	(adj. 0-10 )
Cool	1st Stage	2nd Stage
Setpoint	turn on	turn on

TEMPERATURE INCREASE

Page 21.5