ADJUSTMENT
COMPENSATION
PROPORTIONA
ADJUSTMENT
Fig. 14.
Adjustment Locations.
DIRECT TO REVERSE ACTING
1.
Loosen the four screws (Fig.
15)
on the proportional
module.
2.
Remove the module. Rotate the module and its gasket
180 degrees and reinstall. Ensure that the notch on the
module lines up with the
proper indication on the
base.
3. Retighten the four screws.
4. If required, recalibrate.
PROPORTIONAL M O D U L E
CAPTIVE SCREWS
DIRECT
REVERSE ACTING
NOTE LOCATION
0 F NOTCH
Fig. 15. Changing Controller Action
NEGATIVE TO POSITIVE COMPENSATION
(RP920B and D)
Positive compensation is used for summer compensation
or humidity reset applications.
Loosen the four screws on the compensation module
(Fig. 16).
Remove the module. Rotate the module and its gasket
180 degrees and
reinstall.
Ensure that the notch on the
module lines up with the proper indication on the
base.
Retighten the four screws.
If required, recalibrate.
COMPENSATION MODULE
CAPTIVE SCREWS (4)
NEGATIVE COMP.
POSITIVE COMP.
(FACTORY SET)
7
’
NOTE LOCATION
OF NOTCH.
Fig. 16. Changing from Negative to Positive
Compensation,
lNTEGRAl_ ACTION CUT-OFF AND GAGE FUNC-
TION (RP920C and D)
1.
Check the position of the gasket tab (Fig. 17). The
position of the gasket located under the switch block
module determines the function of the field-installed
gage on the switch block module and determines if the
integral action cut-off function is enabled or disabled,
See Table 2 for factory and field settings.
Table 2. Switch Block Module Gasket Position.
RP920B
B
C
RP920C
B
RP920D
B
C,
B = Branch Line Gage
C = Compensation Sensor Gage
=
Action Cut-Off
Enabled
11
85-O
142
