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A19ZBA Technical Bulletin
Adjustments (See Fig. 4)
The A19ZBA control has a
locked low cutout stop. Pointer
"B" is locked in place with a
screw that requires a special
spanner wrench, Part No.
836-61, to change the setting.
The special wrench is supplied
with each control. To change
the low cutout stop setting,
proceed as follows:
1. Loosen screw "C" with the
special wrench.
2. Slide pointer arm "B" to the
desired cutout setting
(adjustable from
approximately 38 to 48
°
F
[3 to 9
°
C]). The cutout
setting is indicated by the
flat of arm "B."
3. Tighten screw "C."
The cut-in temperature is set by
moving knob "A" to the desired
cut-in setting. This knob
adjustment does not change the
cutout setting, but provides for a
short or long recycle time as
required by the application.
Checkout Procedure
Before leaving the installation,
observe at least three complete
operating cycles to be sure that
all components are functioning
correctly.
Repairs and Replacement
Field repairs must not be made.
For a replacement control,
contact the nearest Johnson
Controls distributor.
Controls Group
507 E. Michigan Street
P.O. Box 423
Printed in U.S.A.
Milwaukee, WI 53202
