Honeywell MO953 Series Mounting instructions

DESCRIPTION
The MO953 and MP953 Pneumatic Valve Actuators
(“Actuators”) are used with V5011 and V5013 Valves and
can control older steam and water valves via adapters. The
M0953A-D Actuators are functionally identical to the
MP953A-D Actuators. Therefore, most of this sheet is
directed to the MP953 Actuators.
MP953A and B Actuators use a Gradutrol Relay for
positioning, and the MP953E and MP953F Actuators use a
positive positioner. The relay and the positioner function in
essentially the same way. Positivepositionerretrofitkitsare
available for MP953A and B Actuators (see
ACCESSORIES).
APPLICATION
These Actuators operate the V5011 and V5013 Valves
and certain other coil, line, and zone valves that
GENERAL
proportionally control steam or hot and cold liquids in
HVAC systems.
SPECIFICATIONS
MODELS:
MP953A-Direct-acting with Gradutrol Relay
MP953B-Reverse-acting with Gradutrol Relay
MP953C-Direct-acting without positioner
MP953D-Reverse-acting without positioner
MP953E-Direct-acting with positive positioner
MP953F-Reverse-acting with positive positioner
MAXIMUM SAFE AIR PRESSURE
25 psi (172 kPa)
See Table 1 for additional specifications.
Table 1. MO953/MP953 Specifications.
MP953
I MO953
I
Size in
Device Type Active Inactive Active Inactive In. (mm)
Direct acting -
A1087 A1004 A1210
- Al 5 (127)
with Gradutrol - Al095 A1012 Al228
-
A2
Relay
A
I
-
All78 A1053
-
A7
-
A1202 All86 A1061
-
A8 13 (330)
with Gradutrol
i
Cl067 I-
Cl067 C3XH 8 (203)
Cl075
I -
Cl075 C3XK
-
Cl141
-
C9XH 5 (127)
-
Cl158
-
C9XK
112 (13) 160 (71)
314 (19)
314 (19)
l-1/2 (38)
314 (19)
l-1/2 (38)
314 (19)
103)
l/2 (13) 2-7 (14-48) No
8-l 2 (55-83)
1 3-91 75-5500

Table 1. MO953hW53 Specifications (Continued).
MP953 MO953 Sh?In
Device Type Active 1 Inactive Active 1 Inactive In (mm)
-
I Cl166
-
I c9xL 5 (127)
Travel in
In (mm)
1n (13)
314 (19)
Direct acting
no Relay or
positioner
(Cant) 8-12
(55-83)
4-l 1 (28-76)
250 (121) 3-7 (21-48)
8-12 (55-83)
4-l 1(28-76)
160 (71) 3-7 (21-48)
8-12
(55-83)
4-l 1 (28-76)
8 (203)
-
Cl414
- -
Cl471 Cl125 Cl471
C8XH 13 (330)
I
l-l/2 (38)
Cl489 Cl133 Cl489 C8XL
Cl554 - Cl554 -
Cl562 - Cl562 -
314 (19)
7-118 (181)
-
D1206 D1206t -
-
D1214 D1214t
-
D1222 - D1222 -
D1230
D1248
D1255
El301
El319
Direct acting
with positive
positioner l-112
(38)
El327
El277
El285
El293
-
- -
- - -
8 (203)
El368
El376
El384
1-K (38)El392
El400
-- -
13 (330)
- - -
- - -
!
3 (330)
El418
El427
-
I- I- I
El435
El443
-I-
I- I
Reverse acting F1119 --
-
7 (180)
with positive FllOl --
-
wsitioner
F1093 --
-
10 (69)
160 (71) 10 (69)
No
,
*Diaphragm color indicates maximum temperature:
Black (Neoprenetl6OF (71C)
Black with White Dot (Ethylene Propylene-250F (121C)
75-5500

OPERATION
In a direct-acting (n.o. valve) system, an increase in
control (branch/pilot) air pressure forces the Actuator
diaphragm and cup assembly downward, forcing the valve
stem down to proportionally close off the flow through the
valve (Fig. 1).
In a reverse-acting (nc. valve) system, an increase in
control (branch/pilot) air pressure forces the Actuator
diaphragm and cup assembly upwards, forcing the valve
stem up to proportionally increase the flow through the
valve.
In Actuators without Gradutrol Relays or positive
positioners, branchline pressure is applied to the
diaphragm. In Actuators with Gradutrol Relays or positive
positioners, up to full main air pressure is applied to the
diaphragm to ensure the valve is positioned proportionally
to the pilot pressure (the branchline pressure output from
the controlling device).
1
THERMOSTAT
POSITIONER
Mius
Fig. 1. Typical Direct-Acting MP953 Operation.
MAINTENANCE
EQUIPMENT NEEDED
- Commercial cleaning solvent or degreaser
- Pressure Gage 14003519 (0 to 30 psi [0 to 207 kPa])
- Wrench 301572A for MP953A and B
VISUAL INSPECTION
Check periodically for leaks, loose fittings, and other
visible problems.
CLEANING
Clean the Actuator with a commercial cleaning solvent or
degreaser.
AWARNINGA
Careless handling of solvents can cause permanent
respiratory or skin damage. Avoid prolonged exposure to
solvents.
OPERATIONAL CHECK 2
Vary the branchline (pilot) pressure through the
operational range of the Actuator in both directions. The
valve should open and close smoothly.
ADJUSTMENTS
CHECK ADJUSTMENT ON MP953A, B, E, F
Install gages in the main and pilot air lines.
Main
air pressure should be greater than or equal to the
top of the sequencing range (span): 13 psi (90 kPa) is
the minimum main pressure for the device to function.
Slowly increase
pilot pressure and note the pressure at
which the valve stem begins to travel. This pressure
should be within kO.75 psi (5 kPa) of the start point
setting of theMP953AandB‘ForMP953EandF, the
pressure should be within +l psi (7 kPa) of the start
point.
Continue increasing the pilot pressure until the valve
stem stops traveling. This pressure should be the start
point pressure plus the range (span) setting.
75-5500

SET OPERATING RANGE
MP953A, B
1,
2.
Use Wrench 301572A to loosen the cover locking
screw (Fig. 2).
Unscrew the start point adjustment knob until thread
is disengaged. Remove knob.
a. For 3 psi (21 kPa) range, back all range adjustment
screws off to friction stop.
b. For 5 psi (34 kPa) range, back only the black range
adjustment screws to stop and tighten the outer,
cadmium-plated range adjustment screws.
c. For 10 psi (69 kPa) range, tighten all range
adjustment screws.
MP953E, F
Change the operating range of MP953E and F by
replacing the feedback spring with one for the desired range
(see REPAIR).
ADJUST START POINT
MP953A, B
RANGE ADJUSTMENT SCREWS
(BLANK) - (3)
START POINT
ADJUSTMENT E ADJUSTMENT
M IUM PLATED) -
RANGE
ADJUSTMENT
INSTRUCTIONS
SHOWN HERE
RELA‘i BODY
8817-I
Fig. 2. Adjustment Points of M0953/MP953A and B
Gradutrol Relay.
Reinstall setpoint knob.
Tighten knob by turning it until it is seated on relay
body (Fig. 2).
Loosen knob (maximum of one turn) until start point
of correct scale range lines up with start point
indicator.
Tighten knob locking screw until it engages relay
body. Do not overtighten.
MP953E, F
Set the start point on the positioner to the value shown on
the job drawings. Critical applications and feedback spring
changes mightrequire fine-tuning the start point. Each click
of the start point knob will adjust the start
point 0.25 psi (1.7
kPa).
75-5500
4

TROUBLESHOOTING
EQUIPMENT NEEDED
Troubleshooting procedures require Pressure Gage
14003519 (0 to 30 psi [O to 207 kPa]).
SYMPTOMS AND CORRECTIVE
ACTION
Figures 3 and 4 show troubleshooting flowcharts.
CHECK THAT ACTUATOR
IS SECURELY MOUNTED
AND STEM EU-lTON IS
PROPERLY LATCHED
NO
f
PRESSURETO
A
DOES
RANGE VALUE
LOOSEN POSiTlONER
SETPOINT COVER. SLOWLY
TURN COVER SCALE TO
BELOWZERO START POINT.
ADJUST POSITIONER
START POINT DIALTO
MINIMUM VALUE
I
RECAUBRATE
POSITIONER START
POINT IF NECESSARY
NO
Y
REMOVE ANY FOREIGN
MATERIAL; AND/OR
REPAIR DISC, SEAT.
AND STEM; AND/OR
REPACK VALVE
Fig. 3. Troubleshooting Flowchart for MP953A, B, E, F (with Gradutrol Relay/Positioner).
5

IS SECURELY h4OUNTED
AND STEM 6UlTON Is
PROPERLY LATCHED
NO
I
ADEQUATE FOR
COMPLETE REPLACE ACTUATOR
DIAPHRAGM AND/OR
SLEEVE
S-EM MOVE
REMOVE ANY FOREIGN
MATERIAL; AND/OR
REPAIR DISC, SEAT,
AND STEM; AND/OR
REPACK VALVE
ACTUATOR IS OK.
RESTORE SYSTEM
TO SERVICE.
Fig. 4. Troubleshooting Flowchart for MP953C, D (without Gradutrol Relay/Positioner).
75-5500

REPAIR
Table 4. Loosening and Removing Actuator Bases from
Valve Bonnets.
GENERAL
Device Actuator
Series Dia (In.)
Model
Tools Required
This section lists tools needed to disassemble and
reassemble Actuators and gives procedures for replacing
parts of actuators. See PARTS AND ACCESSORIES for
parts diagrams and lists.
MP953A
MP953c
MP953E
3/16-in hex allen wrench (bit)
or T-25 Torx bit
NOTE Series number does not
NOTE:Used only
1989 or later date
actuatorsregardlessof date
umber does not
Table 5. Miscellaneous Tasks.
EQUIPMENT NEEDED Mp953c
MP953E
Tables 2 through 5 list basic repair tasks and the tools
required for each.
MP953A
MP953c
MP953E
Table 2. Removing and Replacing Actuator Covers.
Model
‘~
MP953A
MF953c
h4P953E
MP953B
MIY53D
MP953F
Au
5
1/4-h hex socket
8
- 3/8-in hex socket
- Two l/4-20 x 3 in. hex-head
bolts, threaded to within
l/%-in. of bolt head
13
- 3/8-in. hex socket
-Four 5/16-18 x 3 in. hex-head
bolts, threaded to within
l/2-+1. of bolt head
All
7
5/16-in. hex socket
MP953B
MP953D
MP953F
Task Tools Required
Removing MP953A
Gradutrol Relay positioner
Crescent wrench with jaw
opening to at least 2-5/8 in. (67
mm). Narrow-jaw pipe wrench or
large adjustable pliers may be
substituted as long as they do not
distort
the setpoint knob.
Removing MP953E positive
positioner Adjustable crescent wrench with
jaw opening to at least
2-5/8 in.
(67 mm).
Table 3. Removing and Replacing Actuator Bases.
5/16-in. hex socketRemoving
hJP953B
Gradutrol Relay positioner
bracket assembly
Removing
MP953F positive
positioner bracket assembly
De vice
Actuator
Model
Series Dia (In.)
MP953A 2
5
MP953c 2
MP953E 1
Tools Required
5/16-in. hex socket
5/16-in. hex socket or T-25
Torx bit
NOTE: Series number does not
indicate type of
fastener.
Removing and replacing
MP953B, D, F sleeve
diaphragm
- Small-blade screwdriver
-3/16-m hex socket
- l-3/8-in. adjustable hex socket
(crescent wrench is acceptable
substitute)
9/16-m., six-point, deep socket
(3/8-in. drive preferable)
3/8-in. hex allen wrench (bit)
3/16-m. hex allen wrench (bit)
3/16-in. hex allen wrench (bit)
or T-25 Torx bit
NOTE: Series number does not
indicate type of
fastener.
Pliobond glue or equivalentReplacing feedback-spring
cup on
MP953A, E main
diaphragm
Unlatching actuator from
valve stem button Medium- to large-blade
screwdriver
MP953F 1 Lubricating
MP953A
Gradutrol Relay positioner
O-ring
Lubricant or silicone grease
obtained locally
Lubricating
MP953E
positive positionerO-ring
75-5500

GRADUTRO
‘ELAY ASSEMBLIES
313695 J
31371 I
(MP953B) ’
A
SPRING
-@
/--_315178 CUP
6-32 X l/4 ROUND H
SCREW 0-80X 5/16 ROUND HD
NUT OS0 X .05
IN. THICK
PARTS BELOW COMMON TO AU RELAYS PARTS BELOW COMMON TO ALL RELAYS
VALVE UNIT
CUP ASSY
START POlNT
SPRING
A
1
THE 313711A AND D MODELS HAVE
DUAL BARBED CONNECTORS; THE
3137118 AND C MODELS USE
PlPt=
. . -
THREAD CONNECTION. THE 313711A
AND 8 MODELS HAVE DUAL SCALE,
ENGLISH AND METRIC; THE 313711C
AND D MODELS HAVE ENGLISH
5!32c-2
75-5500
Fig. 5. Gradutrol Relay Assemblies Exploded View.
8