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Instruction Manual
MCK-1179
July 2012
Types 749B and R130 Changeover Manifolds
TyPE HSRL-749B
WARNING
!
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion
and/or fire causing property damage and
personal injury or death.
Fisher
equipment must be installed,
®
operated, and maintained in accordance
with federal, state, and local codes
and Emerson Process Management
Regulator Technologies, Inc.
instructions. The installation in most
states must also comply with NFPA No.
54 and 58 standards.
Only personnel trained in the proper
procedures, codes, standards, and
regulations of the LP-Gas industry
should install and service this equipment.
TyPE R130/21
Figure 1. Changeover Manifolds and Regulator Assemblies
www.fisherregulators.com
Types 749B and R130
TyPE 64SR/122
Things to tell the Gas Customer:
1. Point out the regulator's vent to the customer (or
vent assembly or vent tube), and stress that this
opening must remain unobstructed at all times.
Tell the customer to be sure to check the vent
opening after a freezing rain, sleet storm, or snow
to make sure ice has not formed in the vent.
2. Show the customer the shutoff valve on the
container. The customer should close this valve
immediately if gas is smelled, appliance pilot lights
fail to stay on or appear higher than usual, or any
other abnormal situation occurs.
3. Tell the customer to call your company to service
the regulator if the regulator vents gas or a leak
develops in the system. Only a qualified gas
service person should install or service
the regulator.
TyPE 749B/21
Table of Contents
Related Manuals for Emerson Fisher 749B
Summary of Contents for Emerson Fisher 749B
- Page 1 The customer should close this valve with federal, state, and local codes immediately if gas is smelled, appliance pilot lights and Emerson Process Management fail to stay on or appear higher than usual, or any Regulator Technologies, Inc. other abnormal situation occurs.
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Page 2: Specifications
Types 749B and R130 Specifications The Specifications table lists the specifications for the regulators. Contact the factory if the regulators are to be used on any sevice other than LP-Gas, natural gas, or air. Changeover Manifold Assemblies OuTLET PRESSuRE SETTING CAPACITy BTu/HR. -
Page 3: Operation
Types 749B and R130 PRESSURE GAUGE OR INDICATOR WITH RED STATE CHANGEOVER WARNING FLAG MANIFOLD SECTION RESERVE INLET SUPPLY INLET SUPPLY VENT VENT POINT ALL VENTS DOWN FINAL STAGE REGULATOR VENT T40469 FINAL STAGE REGULATOR Figure 2. Changeover Regulator Operation will open and maintain the reserve setting to the second-stage regulator, which continues to regulate The Changeover Manifold (Figure 2) consists of two... -
Page 4: Installation
Types 749B and R130 handwheel into the old reserve side regulator until If the regulator is exposed to an it cannot be turned any further. This side is now overpressure condition, it must be the new “Supply” side. Screw the cap and the inspected for any damage that may chain assembly into the old supply side until it cannot have occurred. - Page 5 Types 749B and R130 SuPPLy vIEW A-A T80219 Figure 3. Assembly Drawing Table 1. Manifold Spring Rates 749B Series (Type 64 Manifold Regulators) RESERvE OuTLET PRESSuRE STANDARD APPROxIMATE SuPPLy CHANGEOvER REGuLATOR SPRING SETTING AND RANGE PRESSuRE ABOvE RESERvE SETTING 6 psi / 0.41 bar Zinc Adjustable Range 9 psi / 0.62 bar...
- Page 6 Types 749B and R130 T20923 APPLy LuBRICANT (L) Figure 4. Indicator Assembly Drawing To Change Settings in the Field: 4. Close the right side of the container valve and open the left side container valve. Loosen See Figure 3. the adjusting screw nut (key 1) on the left side 1.
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Page 7: Maintenance
Types 749B and R130 counterclockwise to decrease the pressure. The Visually inspect the regulator each time a gas delivery is indicator should show red at about 3 psi / 0.21 bar made for: above the new reserve setting. The indicator should 1. - Page 8 For further information visit www.fisherregulators.com The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls International LLC, a business of Emerson Process Management.