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range to within
pecified throttling range for
either the throttling range
adjustment or calibration screw were changed,
recalibrate the Thermostat.
See TP970
B, beginning at Step
balance of TP970C and 5 calibration.
Pa ) main line pressure, turn the DAY
ostat is not properly calibrated, but the remainder
midist/Thermostat operation
degrees F
1,
for the
ssure, repeat Steps
tur n the calibration screw
(1 3
essure is set to the low
0 psi (0 kPa) (RA) or 13 psi (90 kPa) (DA).
TP972A:
0 psi (0 kPa).
If it does not, turn the switchover adjustment screw
(Fig. 20) clockwise until it does.
Turn the switchover adjustment screw counterclockwise
until the pressure begins to:
TP971A, B, D, AND, E:
Increase (RA) or decrease (DA).
TP972A:
Increase.
This indicates switchover.
Allow the Pressure Gage to go to:
TP971A, B, 5, AND, E:
Full main line pressure (RA) or 0 psi (0 kPa) (DA).
TP972A:
Full main line pressure.
Turn the switchover adjustment screw counterclockwise
until the pressure:
i (0
full main line pressure (DA).
TP972A:
Decreases to 0 psi (0 kPa).
Turn the switehover adjustment screw an additional 1/8
to 1/4-turn clockwise.
BACK PLATE
SCREWS
MOST-AT
MULTISTAGE
FILTER
SWITCHOVER
SCREW
kPa) (RA) or increases to
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