Honeywell MP953B, Руководство по установке и обслуживанию

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AND ADJUSTMENT PROCEDURES FOR HONEYWELL
MP-953F PNEUMATIC.OPERATORS USED ON ARMSTRONG HUMIDIFIERS
VIII.OPERATING RANGE AND START POINT MP-953B (See Figure 3)
Using a wrench (Honeywell Part No. supplied
with gradutrol), loosen the cover locking screw.
2. Unscrew the start point adjustment knob and make
adjustments according to the directions printed inside
IX.
the knob as follows:
Range adjustment
a)
3 lb. range, all
screws backed off
to friction stop.
b)
5 lb. range, plated
(outer) s c r e w s
tightened. Black
(inner)
s c r e w s
b a c k e d - o f f t o
friction stop.
c)
10 lb. range, all
screws tightened.
Start point adjustment
Tighten cover until
it bottoms.
Back off (one turn
max.) until desired
start
point of
correct range scale
lines up
with
indicator near
marking.
Tighten the cover locking screw until it engages
the relay housing. Do not overtighten.
OPERATING
1. Set
S
TART POINT
COVER
RANGE ADJUSTMENT
LOCKING
/ S
C R E W
SCREWS
RANGE ADJUSTMENT SCREWS
BODY
Fig. 3
Adjustment Points of
Gradutrol Relay.
START
RANGE AND START POINT
MP-953F PILOT POSITIONER
the start point on the positioner to the value
desired. Each click of the start point knob adjusts
the start point psi.
NOTE: ON THE MP-953F PILOT POSITIONER, ONLY THE START
POINT IS ADJUSTABLE.
THE SPRING RANGE IS NOT
ADJUSTABLE. THE RANGE CAN ONLY BE CHANGED BY REPLACING
THE FEEDBACK SPRING.
Honeywell MP-953F operators (with positioners) come
standard with an 8
13 psi (black) main spring. This
does The feedback spring, however,
maybe changed in order to
vary
the
spring range of the
operator.
It is available in 3
(See Chart 4)
or 10 lb. ranges.
Since the start point is adjustable,
full open point willbethe startpointplus the spring
range.
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