manualshive.com logo in svg

Honeywell HP970A, Сервисные данные, Страница: 6 / 10

Поделиться
Скачать
Honeywell HP970A Скачать руководство пользователя страница 6

HP970A, BAND HP972B PNEUMATIC 

REPAIR

SCALEPLATE REPLACEMENT

GENERAL

If 

the Humidistat requires replacement, do not remove the

existing mounting plate from the mounting surface, or adjust
or repair any piping.

 REPLACEMENT

Remove the Humidistat cover.
Insert a small screwdriver blade between the 
indicator and the scaleplate assembly (Fig. 7) and pry
the 

 indicator up off the 

 cam and

wheel assembly.
Carefully pry off the two retaining rings from the
scaleplate mounting posts.

Detach the scaleplate locking tab at the right of the
Humidistat base and lift off the scaleplate assembly.
Using the retaining rings included with the new

scaleplate assembly, install the new scaleplate in

reverse order. Be certain to align the flat of the 

pointer with the flat on the hub of the 

 cam and

wheel assembly.
Check calibration of Humidistat and recalibrate if

necessary.

Remove the Humidistat cover.
Remove the old Humidistat, leaving the airhead

connected to the mounting plate.

Discard the new mounting plate.

Align the port holes (Fig. 6) on the back of the
replacement Humidistat with the air connections on the
existing airhead.

Snap the new Humidistat onto the old mounting plate.
Calibrate the new Humidistat.

Reinstall the Humidistat cover.

NOTE: If the gage tap fails to seal itself properly after

Pressure Gage 14003519-001 is removed, bleed off

a small amount of air and insert Gage Tap Plug

 into the gage tap.

Reinstall the Humidistat cover.

PORT

BACK PLATE
M O U N T I N G
SCREWS (4)
TO CHANGE

FILTER REM

B A C K

MULTI STAGE

C A R T R I D G E
TYPE FILTER

(UNDER BACK
PLATE)

SCALEPLATE

RETAINING
RINGS (2)

INDICATOR

SCALEPLATE

SCALEPLATE
LOCKING TAB

ENGAGEMENT 

 CAM AND

WHEEL ASSEMBLY

 6. 

Humidistat Back View. Fig. 7. 

 Replacement.

Содержание HP970A

Страница 1: ...tings to convert older models or competitors humidistats Figure 1 shows a typical HP970A 13 or HP972B two pipe hookup Figure 2 shows a typical HP972B one pipe hookup HP970A B HP972B MB VALVE SUPPLY N C C322 5 Fig 1 Typical HP970A 6 or HP972B Humidistat Two Pipe Hookup HP972B RESTRICTION BLUE HUMIDIFIER VALVE N C SUPPLY C3226 Fig 2 Typical HP972B Humidistat One Pipe Hookup SPECIFICATIONS Action HP9...

Страница 2: ...outdoor temperature preventing condensation during extreme winter conditions The tools shown in Figure 3 and a sling psychrometer or Digital Relative Humidity Pen CCT915 are necessary to calibrate the Humidistats PEN CCT915 0 if the nylon sensing element becomes contaminated with oil grease or dust remove and clean it by meetly agitating it in an acetone solution Dry the element at room temperatur...

Страница 3: ...oes not bleed off properly proceed with RECALIBRATION RECALIBRATION CAUTION These Humidistats are sensitive devices and should be handled with extreme care during calibration Do not breathe directly on the element when the cover is off Ensure the system is stabilized and the main air is maintained at normal pressure between 13 and 21 psi 90 and 145 kPa Factory calibration is 18 psi 125 kPa Remove ...

Страница 4: ...HP97QA i AND HP9725 PNEUMATIC HUMIDISTATS Table 1 Common Problems Causes and Solutions 75 7195 ...

Страница 5: ...HP970A BAND HP972B PNEUMATIC HUMIDISTATS RESSURE IS REDUCE 1 N O Z Z L E SEMBLY f CHECKTHE MAIN AIR PRESSURE AT THE PRV PRESSURE DROP IN THE LONG AIR Fig 5 Humidistat Troubleshooting Flowchart 75 7195 ...

Страница 6: ...e flat on the hub of the setpoint cam and wheel assembly Check calibration of Humidistat and recalibrate if necessary Remove the Humidistat cover Remove the old Humidistat leaving the airhead connected to the mounting plate Discard the new mounting plate Align the port holes Fig 6 on the back of the replacement Humidistat with the air connections on the existing airhead Snap the new Humidistat ont...

Страница 7: ...acement unit in reverse order Make certain that the two levers are free to move Recalibrate the Humidistat Reinstall the Humidistat cover CALIBRATION LEVER ARM7 RELIEF SPRING SPRING POST Fig 8 Back of the Humidistat Showing Relief Spring Connections SCREW __ CALIBRATION CALIBRATION LEVER HOOK r MOUNTING SCREW NO 4 x 3 16 PN HD NOZZLE FLAPPER ELEMENT CALIBRATIO ELEMENT L E V E L HOOK ASSEMBLY YOKE ...

Страница 8: ...ng these parts use extreme care to prevent dirt dust or debris from entering various openings of the Humidistat base or the restrictor block Remove the humidistat cover Remove the Humidistat 3 6333 2 Fig Il Restrictor Block Assembly and Filter Cartidge Replacement Access to the restrictor block assembly and filter cartridge is from the rear of the base assembly Remove the four mounting screws from...

Страница 9: ...t Covers Part Number Suffix Window insert Setpoint 20 80 RH o Window Insert 03040506070 Vhen ordermg use complete part number rncludrng three digrt suttrx 14004407 XXX Covers are paintable See HP970 72 and TP970 74 Pneumatic Sensors Humidistats and Thermostats Installation instructions 955597 for painting information ACCESSORIES Table 4 HP970A B and HP9728 Pneumatic Humidistat Accessories Parts Li...

Страница 10: ...lping You Control Your World 75 7195 8 89 By using this Honeywell literature you agree that Honeywell will have no liability for any damages arising out of your use or modification to the literature You will defend and indemnify Honeywell its affiliates and subsidiaries from and against any liability cost or damages including attorneys fees arising out of or resulting from any modification to the ...

Отзывы:

Нет отзывов