Emerson CS800 Manual de instrucciones descargar pdf (Pagina 14)

CS800 Series

than the outlet pressure setting of the regulator. See

the 289 Series Instruction Manual (D100280X012) for

more information.

Vent Line Installation

The CS800 Series regulators have a 1 or 2-1/2 NPT screened

vent opening in the spring case. If necessary to vent escaping

gas away from the regulator, install a remote vent line in the

spring case tapping. Vent piping should be as short and direct

as possible with a minimum number of bends and elbows. The

remote vent line should have the largest practical diameter. Vent

piping on regulators with internal relief must be large enough to

vent all relief valve discharge to atmosphere without excessive

backpressure and resulting excessive pressure in the regulator.

Ensure piping is properly supported to avoid excessive stress on

the regulator spring case.

The CS800 Series offers optional Token Relief that provides

low-capacity relief which is located in the spring case of the

Primary Regulator. If necessary to vent escaping gas away,

install a remote vent line in the spring case tapping of the

Primary Regulator as described above.

Periodically check all vent openings to be sure that they are

not plugged.

CS800 Series outlet pressure ranges are shown in Table 5.

Outlet pressure greater than 3 psi / 0.21 bar above setpoint

may damage internal parts such as the diaphragm head

and valve disk. The maximum emergency (casing) outlet

pressure is 15 psig / 1.0 bar.

Startup

CAUTION

Pressure gauges should always be used to

monitor downstream pressure during Startup.

With the downstream system depressurized, perform the

following procedure to startup the regulator.

1. Check to see that all appliances are turned off.

2. Slowly open the upstream shut-off valve.

3. Check inlet and outlet pressure for correct values.

4. Check all connections for leaks.

5. Turn on utilization equipment and recheck the pressures.

Adjustment

Note

The range of allowable pressure setting is

stamped on the nameplate. If the required

setting is not within this range, substitute the

correct spring (as shown in Table 5). If the

spring is changed, change the nameplate to

indicate the new pressure range.

Because of the weight of internal regulator

parts, the Red spring, 3.5 to 6 in. w.c. / 9 to

15 mbar spring range (nominal 4 in. w.c. /

10 mbar setting) gives the best pressure control

when the regulator spring barrel is pointed

down. Spring barrel down orientation may

require that vent piping or vent adaptors are

installed to keep the vent pointed down.

For types that include the Integral Monitor

module, refer to the Instruction Manual for

Type TM600 Integral Monitor, document

D103126X012, for Adjustment and Maintenance

of the Integral Monitor. For types that include

the Slam-shut module, refer to the Instruction

Manual for Type VSX8 Slam-shut, document

D103127X012, for Adjustment and Maintenance

of the Slam-shut.

A pressure gauge should always be used to monitor

downstream pressure while adjustments are being made.

1. Remove the closing cap (key 60, Figure 12).

WARNING

During setpoint adjustment, do not mistake

the Token Relief Spring Nut (key 46) for the

main spring adjusting screw. Turning the

Token Relief Spring Nut will change the

token relief setting and if rotated

counterclockwise could result in gas

discharge and possible personal injury.

2. To increase the outlet setting, turn the adjusting screw

(key 65, Figure 12) clockwise. To decrease the outlet

setting, turn the adjusting screw counterclockwise.

3. Replace the closing cap or tighten the hex locknut.

Types CS803 and CS823 with Integral

True-Monitor™ Module

When adjusting the primary regulator and integral

True-Monitor for operation, ensure that the pressure

differences between the primary regulator and the integral

True-Monitor shown in Tables 8 and 9 are observed.

For example, if the primary regulator setpoint is set at

7 in. w.c. / 17 mbar, then the integral monitor should be set

at a minimum of 14 in. w.c. / 35 mbar or higher.

To test the integral monitor operation, the primary regulator

setpoint must be adjusted above the integral monitor’s

setpoint to simulate a failure of the primary regulator. If the

spring range of the primary regulator is sufciently high, it

can simply be adjusted above the integral monitor’s setpoint

by following step 2 above. Otherwise, a different spring with

a setpoint higher than the integral monitor’s setpoint must

be installed to check the operation of the integral monitor.

An alternative to using a higher set spring on the primary

regulator is to attach a hand pump and gauge to the primary

regulator vent to pressure load it until its setpoint exceeds

that of the integral True-Monitor.

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