MCDonald 6282 User manual
Turn outlet valve 90º counter clockwise to Position 1.
Turn inlet valve 90º counter clockwise to Position 2.
Turn the outlet valve 90º clockwise to
Position 4.
Inlet valve at position 3 (arrow pointing down),
outlet valve at position 4
(arrow pointing right)
.
Normal Operating Flow Mode
Bypass Flow Mode
Meter Maintenance
Meter Maintenance
STEP 1STEP 5 STEP 4 STEP 3 STEP 2
Purge Mode
Back To Normal Operation Flow Mode
Slowly turn the inlet valve 90º clockwise to position 3. This means
that gas is now starting to enter the meter and will push the air in
the meter to the purge port where it can escape to atmosphere. Purge
meter until the smallest increment dial makes two full rotations. DO
NOT PURGE IN A CONFINED SPACE! Once the meter is purged, replace
the purge port plug.
Perform required maintenance to the meter, when the meter change out or meter maintenance has been completed, purge the air out of the new meter (as
noted in Step 4 below) before taking the meter bar out of bypass mode. Do this by fully assembling the meter to the bar, then removing the purge port plug
to allow gas to ow to atmosphere. Reference gure above for purge port location. Once the plug has been removed, proceed to step 4.
Natural Gas
6282 By-Pass Procedure
NOTE: Failure to follow this procedure may result in interrupted gas service and loss of pilot lights.
NOTE: It is recommended that a manometer be installed at the downstream pressure tap prior to operating
the bypass. The manometer will monitor the downstream pressure. In the event the pressure drops
below your stated system requirements, an improper sequence may have occurred. The valves should be
returned to normal operation immediately to restore ow of gas. Once pressure is restored, the bypass
procedure can then be started again. If the pressure drops below your stated system requirements at
any time, pilots need to be checked and possibly relit.
- Bypass application only at regulated pressure.
- Follow all applicable codes and procedures.
3/223210-625
Outlet
Valve
Purge
Port
Inlet
Valve
Manometer Pressure
Gauge Tap
By-Pass Mode
OUTLETINLET
1
3
24
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
Natural Gas
6282 By-Pass Procedure
3/223210-625
Valve Rating 25 PSIG | Ball Style Instructions
NOTE: These valves are designed for use with natural, manufactured or LP gas only.
INTEGRAL VALVE FEATURES
1. Valves can be locked in "NORMAL FLOW" (through the meter) or in "BYPASS MODE" to prevent unwanted operation.
2. The bypass meter bars are designed to provide uninterrupted gas service during gas meter maintenance. The ability to maintain
gas ow to the home comes from the valves' oversized ports, which allow for a minimum-ow condition during valve operation.
1. Read instructions and reference pressure rating on integral valves before valve installation or maintenance of meter bar.
2. Inspect valves and remove any foreign material.
3. Always apply a quality grade pipe thread sealant to the pipe before installation - do not use teon tape. Excess pipe sealant contacting the plug surface
may cause the valve to leak.
4. Always wrench nearest to connection point. Never insert a tool into the port area of the valves to thread bar onto the pipe. Incorrect tightening or
overtightening of the bar on installation can cause valve failure.
5. Installation torques should be reduced when using pipe heavier than schedule 40.
6. Reference the bypass procedure shown below and on reverse side. DO NOT INSTALL IN A CONFINED SPACE.
7. Lock the valves to prevent unwanted operation or access.
WARNING: This product can expose you to chemicals including lead, which is known to the State of CALIFORNIA to cause cancer and birth defects or other reproductive harm. For more
information go to: www.P65Warnings.ca.gov.
PORT
PORT
INSULATED UNION ENDS
A.Y McDonald's O-ring or at gasket design insulated end assures positive sealing and long lasting service.
The insulated end is properly assembled to the head piece by tightening the union nut hand tight plus 1/4 to 1/2 turns.
CAUTION -EXCESSIVE TIGHTENING COULD CAUSE LEAKAGE.
O-RING DESIGN
If the O-ring is removed from the end piece, it can easily be replaced as follows:
1. Lay O-ring in groove - do not force it in with your ngers. A coat of petroleum jelly should be applied to the O-ring after assmbly into groove.
CAUTION - O-RING AND GROOVE MUST BE FREE OF FOREIGN MATERIAL.
2. Hand tighten the union nut onto the head piece to uniformly press the O-ring into the groove.
3. This uniform pressure of the meeting of the head piece and end piece will properly seat the O-ring.
4. Remove head piece and inspect to verify O-ring is in place.
SHUT OFF POSITION
WARNING: This position will shut-off the ow of gas and require shut-off
procedure and pilots re-lit.
To stop the ow of Gas to meter and structure, turn valves to Position 2 & 4.
2
3
4
1
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