Table 18 Ð Test of Input Signals (cont)

 

 

 

KEYBOARD

DISPLAY

COMMENTS/ACTION

ENTRY

RESPONSE

 

 

FSD NRM

At Terminal Block 3, short Terminals 1 and 2. Verify that the display changes to FSD ALM. Verify the

 

 

following:

·Supply fan is OFF

·Outside air and exhaust dampers (if applicable) close

·Return fan is OFF

·Supply fan IGVs close (VAV units)

·Return fan IGVs close (VAV units equipped with return fan)

·Heat Interlock relay is OFF (VAV units)

 

MTR XXX

If applicable, verify that the display increments following the connected pulse-type meter measuring power.

 

OAVP 0.00

Verify that the velocity pressure reads 0.00 in. wg with the fan OFF and the mixed-air damper closed

 

(0 setting).

 

 

 

AQ1 XXX

Verify the displayed value using ®eld-supplied instrumentation located near the sensor.

 

AQ2 XXX

Verify the displayed value using ®eld-supplied instrumentation located near the sensor.

 

CUST EN

Verify condensing unit lockout operation by rotating thermostat so display changes to CUST DSB. Reverse

 

thermostat to change setting back to CUST EN and reenable unit.

 

 

 

DXSD NRM

Verify that the direct expansion cooling shutdown value is normal.

 

 

 

 

 

Proceed with the testing of the outputs options (Table 19).

 

 

 

 

LEGEND

 

HOA Ð Hands/Off/Automatic

 

IGV

Ð Inlet-Guide Vane

 

VAV

Ð Variable Air Volume

 

105

Page 105
Image 105
Carrier 39L specifications Keyboard Display COMMENTS/ACTION Entry Response FSD NRM, Following

39L specifications

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