Elster J125 Operating Instructions Manual

Fig. 1

Fig. 2

Fig. 3

Fig. 4

J125

INSTALLATION CONDITIONS

Body pressure range: 0
Temperature range:

OPERATING INSTRUCTIONS

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FITTING REGULATOR INTO PIPEWORK

1.

2.

3.

4.

5.

6.

7.

8.

9.

INSTALLATION OF VE

1.

2.

3.

s

INSTALLATION OF IMPULSE LINE

1.

2.

FOR PRE

1.

2.

3.

Warning!

force.

Commissioning Instructions

1½” and 2”

- 8.6 Bar

-20ºC to +70 ºC

Ensure that this product is suitable for the chosen application.
Installation, adjustment and maintenance by authorised, trained personnel only.
When being fitted to an appliance, refer to the appliance manufacturers instructions.
For units not fitted with OPSS, ensure that the installation provides adequate

protection to prevent over pressurisation.

Traffic, wind and earthquake loadings should be considered when specifying the

installation.

The unit should be protected from the decomposition of unstable fluids.

Incorrect installation, adjustment, modification, operation and maintenance may

cause injury or damage.
Read the instructions before use. This control must be installed in accordance with the rules in

The unit should not be installed in a corrosive environment.

The ambient temperature (surface temperature) should be within the limits

stated on the regulator catalogue.

Check the maximum allowable pressure on the regulator nameplate

against the installation specification.

Remove the protection plugs from inlet and outlet ports.
Ensure that installation pipework is thoroughly clean.
The direction of gas flow must be the same as the arrows on the regulator

body. See Fig. 1.

Install the regulator into pipework using jointing compound approved to

national standards.

In order to fit the regulator into confined spaces it may be necessary to rotate

the diaphragm case. This is achieved by slacking off the three set screws,
rotating the diaphragm case, and then re-tightening the set screws evenly.
See Fig. 2.

For units with no OPSS fitted it is advised that a slam shut device is fitted to

protect downstream equipment.

NT LINE.

Remove clip and vent screen from regulator top cover.

Connect the vent line (2"), using a jointing compound approved to national

standards, and lead to atmosphere in accordance with national standards.
Ensure that no water can penetrate vent pipeline. See Fig. 3.

If the regulator is fitted with an internal relief valve, ensure that the vent line i

of sufficient diameter to carry gas vented by the relief valve to a safe outside
location. Reference to any national standard.

Remove the plastic protection plug.

Connect the impulse line (½"), using a jointing compound approved to

national standards, and lead to a point downstream not less than fifteen
times the nominal pipe diameter from the outlet. See Fig. 4.

-SET UNITS ONLY.

Turn off downstream valves.

Slowly turn on inlet supply.
If safety shut-off device is not fitted,

go to instruction 6.

J125: 1½” and 2” Commissioning Instructions

4. If safety shut-off device is fitted unscrew reset spindle end cap and firmly

5.

6.

WARNING: DO NOT UNDER ANY CIRCUMSTANCES WEDGE OPEN SAFETY
SHUT
TO FUNCTION IN ADVERSE PRESSURE CONDITIONS.

SETTING THE REGULATOR & SAFETY

1.

2.

3.

4.

5.

off device cover (If UPSS only go to

6. Insert a flat bladed screwdriver into one of the partial slots on the OPSS

7.

8.

insert a pozidriv screw driver (No.2 point) into UPSS adjusting

9.

) to reduce loading on UPSS spring, making sure screw

10.

11.

cock by unscrewing reset spindle end cap and

pulling firmly. Hold in this position until the outlet pipework is fully

screw reset

12.
spring until the required outlet pressure, plus approximately 1"wg (2.5mbar)
is obtained. (This is an allowance for the regulator being set with zero

If UPSS

13.

14. Apply external pressure source to a suitable point on the outlet pipework.

Note: If pressure test point on underside of slam shut unit is used as external
source point, care must be taken to ensure pressures are

across

restricted orifice within test point.

15.

PSS device trips off.

16.

Fig. 5

Fig. 6

Fig. 7

pull. Hold in this position until the outlet pipework is fully pressurized, then
release reset spindle end cap gently. See Fig. 5.

Re-screw reset spindle end cap into body, ensuring not to jam reset spindle.
Commission downstream appliances.

-OFF RESET END CAP AS THIS WILL NOT ALLOW THE SAFETY DEVICE(S)

OPSS = Over Pressure Safety Shut-off.

UPSS = Under Pressure Safety Shut-off.

Turn off inlet and outlet valve(s).

Remove top cap from regulator cover.
Insert an 1¼" A/F socket over the top of the adjustment screw.
Turn anticlockwise (-) to reduce loading on regulator spring to minimum. See

Fig. 6 (If no safety devices are fitted go to instruction 10).

Remove top cap from safety shut-

instruction 8).

spring holder. See Fig. 7.

Turn clockwise (+) to increase loading on OPSS spring to maximum.
If UPSS fitted,

screw in bottom spring holder. See Fig. 8.

Turn anticlockwise (-

head does not protrude from the bottom spring holder.

Slowly open inlet valve(s).

If safety device fitted, re-

SHUT OFF DEVICE PRESSURES.

pressurised, then release reset spindle end cap gently. Re­spindle end cap into body. See Fig. 5.

Turn regulator adjustment screw clockwise (+) to increase the loading on the

flowrate).

only go to instruction 20, if no safety device go to instruction 27.

Block vent valve opening to prevent relief valve from operating.

Increase pressure to that required for OPSS trip-off.

Slowly turn OPSS spring holder anticlockwise (-) until O

See Fig. 7.

Reduce external pressure source to level set in instruction 12.

equalised