Broan AE80S Installation guide

Brand: Broan

Model: AE80S

Type: Installation guide

OPERATION

When set for direct acting, a fall in steam pressure

(Fig. 1) at the controller lowers branchline pressure,

opening a normally open valve to maintain steam presure

at control point. When set for reverse acting, an increase

in pressure at the controller lowers branchline pressure,

opening a normally closed valve to maintain steam

presure at control point.

NT REQUIRED

Commercial cleaning solvent or degreaser.

Lubricant 3 10879.

Gage 305965 (O-30 psi).

Gage Adaptor MQP 729.

WARNING

arelesss

handlingof solvents can result in

permanent

damage to the respiratory system or skin. Avoid

prolonged inhalation of vapors or contact with the skin.

Visually inspect the controller for any indication of

external damage, broken or dented pressure input

lines, leaky

connections,

etc.

Remove the

controller

cover and brush all loose dust

and dirt from the case with a soft cloth or brush. Take

care to avoid brushing foreign

matter into the nozzle.

If there is caked grease present that cannot be brushed

away, remove by brushing t

e area with commercial

cleaning solvent,

Coat all adjustment screw

reads

and pivot

points

with Lubricant 310879.

Check the levers for freedom of movement by varying

the setpoint of the

controller.

This is accomplished by

turning the

adjustment

knob located on the top of the

case. If the levers are operating freely,

controlled

device will move

throughbits full range of

Pressure changes in the br

installing a 0 to 30 psi ga

the

controlled

device.

If the operation of the device is erratic or restricted by

ed parts or bent levers, remove from service and

repair or replace (see REPAIR section).

Check the changeover cink (Fig, 2) to determine if it

is in the position to give the desired action.

When the lower end of the changeover link is

connected to the left-hand side of the main lever,

the controller will

e direct acting. In this

position, an increase in pressure on the bellows

bly increases control air pressure.

the lower end of the changeover link is

connected to the right-hand side of the main lever,

the controller is reverse acting. In this position, an

increase in pressure on the bellows assembly

reduces control air pressure.

. To change the link from one position to the other,

carefully spread the prongs on the lower end of the

link and place the link in the desired position.

e certain the supply air

the inlet side of the

ictor is at least 13 psi (90

emove the top of the changeover link from the

flapper

(Fig.

2),

and lift the flapper away from the

nozzle, The air should bleed down to 1.5 psi (10

kPa)

or less. Adjust the restriction if necessary,

hen control air pressure is reduced to its

minimum

pressure,

carefully replace the flapper over the nozzle.

Note the time required for air pressure to build to full

supply pressure. Lift the flapper and note the time

ired for air pressure to bleed down to 1.5 psi

(10

st the restrictor until the build-up and bleed down

time are

approximately

equal,

After the proper setting

been obtained, attach the

changeover link to the

75-

1075

CONTROL POINT

THROTTLING RANGE

ADJUSTMENT SCREW

THROTTLING

CHANGEOVER RANGE SCALE

RANGE INDICATOR

THROTTLING RANGE

THROTTLING

ECCENTRIC SCREW

RANGE SPRIN

LEVER STOPS

PIVOT ADJUSTMENT

MAIN LEVER

--.-/

BELLOWS ASSEMBLY

Fig. 2.

PP97A

with Cover Removed.

CONTROL POINT

Turn the control point adjustment knob (Fig. 2) to the

desired pressure.

Setpoint

is read on the scale located on

the outside of the controller. The control point setting

establishes the low end of the throttling range,

THROTTLING

The throttling range adjustment determines the pressure

change necessary to cause the controller to vary the

control air pressure from 3 to 13 psi (21 to 90

kPa).

adjusting the throttling range, the sensitivity of the

controller can be changed to meet requirements.

Turn the throttling range adjustment screw (Fig. 2)

until the indicator on the throttling range scale is

opposite the desired setting. The throttling range scale is

graduated from the minimum setting (marked MIN), to

the maximum setting (marked F). The divisions between

the two extreme settings are marked A through E.

Because the throttling range of any one controller varies

with the setting of the adjustable restriction and the

setpoint

of the controller, no set value can be assigned to

the divisions of the throttling range scale.

Refer to Table 2 of the maximum and minimum

throttling range for each controller pressure range.

However, the setting for any specific throttling range will

have to be determined by operating the individual

con troller.

NOTE:

PP97A1035

(0 to 15 psi range) is equipped with

a stop placed on the throttling range setting at

D, which provides a maximum throttling range

of approximately 10 percent of the

setpoint

scale

range.

Table 2. Approximate Throttling Ranges of

PP97A.

0 to 15 psi

0.1 psi

1.5 psi

5 to 150 psi

6.5 psi

(69 to 2068

kPa)

(17

kPa)

(83

kPa)

CALIBRATION

Calibrate the

PP97A

after the restrictor is properly set

and, if possible, when pressure on the bellows is

approximately equal to the midpoint of the

setpoint

scale

of the controller.

Adjust the

setpoint

of the controller until the air

pressure in the branch line is 3 psi (21

kPa)

for a

direct acting controller, or 13 psi (90

kPa)

for a

reverse acting controller. At this setting the

indicator on the

setpoint

scale should indicate the

same pressure that is being applied to the bellows.

If the setting does not agree with the pressure on

the bellows, loosen the four screws holding the

setpoint

scaleplate. Adjust the

setpoint

scaleplate

until the

setpoint

indication and the pressure on the

bellows are equal to each other. Retighten the four

screws.

75-

1075

AND PERFORM

OPERATIONAL

CHECK.

HONEYWELL

Minneapolis Minnesota 55408

Scarborough, Ontario M1P 2V9

Subsidiaries and Affiliates Around the

World

Printed in U.S.A.

Broan AE80S Installation guide

Broan AE80S Installation guide

Broan AE80S Installation guide

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