Carrier 33CS450-01 Owner's Manual download pdf (Page 11)

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ECON JUMPER SETTING

If the jumper for MISC2 and 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 MISC1, MISC2,

or MISC3 terminal of the thermostat when the thermostat is in an occupied

time period. The MISC1, 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 of the Owner’s Manual

Control up to two Cool stages.

The 2nd Stage of heat or 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.

(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.

Page 3.5

Explanation of Jumper Settings (continued)Explanation of Jumper Settings (continued)

And

Cool

Setpoint

DeadbandDeadband

db 1 db 2

(adj. 0-10 )(adj. 1-6 )

1st Stage

turn on

2nd Stage

turn on

Cooling

TEMPERATURE

INCREASE

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 23 24

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Carrier 33CS450-01 Owner's Manual Page 11