Instruction Manual
MCK 2156
November 2015
LP-Gas Regulators
R122H, R222H, R222, R232A and R232E Series
Instruction Manual
WARNING
!
Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion
and/or re causing property damage and
R122H, R222H, R222, R232A and R232E Series
personal injury or death.
Fisher® equipment must be installed,
operated and maintained in accordance
with federal, state and local codes and
Fisher 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 R232A
Type R222H
Type R122H
Things to tell the gas customer:
1. Show the customer the vent or vent assembly or vent
tube. Stress that this opening must remain unobstructed
at all times. Tell the customer 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 qualied gas service person
should install or service the regulator.
4. Tell the customer to call your company to have a
leak check performed if the gas supply has been
shutoff or interrupted for any reason. A leak check
must be performed by a qualied gas service person
on the piping system immediately after turning on
the gas supply.
Type R222
Figure 1. R122H, R222H, R222, R232A and
R232E Series Regulators
Type R232E
Introduction
Scope of the Manual
This Instruction Manual covers installation and maintenance
for the R122H, R222H, R222, R232A and R232E Series
regulators, which includes rst stage, second stage, integral
two-stage and integral two psig service regulators used on
LP-Gas vapor service applications. They are not to be used
on liquid service.
www.fisherregulators.com
D450141T012
R122H, R222H, R222, R232A and R232E Series
LP-Gas Regulators
Specications
Specications and Tables 1 and 2 list the specications for these regulators. Contact the factory if the regulator is to be
used on any service other than LP-Gas, natural gas or air. The following information is located on the spring case: type
number, orice size, spring range and date of manufacture.
Pressure Taps Size Restriction
1/8 NPT: #54 / 0.055 in. Drill on outlet and inlet
Orice Sizes
R122H Series: 0.15 in. / 3.8 mm
R222 Series: 0.14 in. / 3.6 mm
R232A, R232E and R222H Series: 0.193 in. / 4.9 mm
Wide Open Cg for Relief Sizing
R122H Series: 23
R222 Series: 18
R232A and R232E Series: 19
R222H Series: 37
Maximum Allowable Inlet Pressure
R122H, R222H, R232A and R232E Series:
250 psig / 17.2 bar
R222 Series: 10 psi / 0.69 bar
Maximum Emergency Inlet Pressure
R122H, R222H, R232A and R232E Series:
250 psig / 17.2 bar
R222 Series
Fisher® Types R122H, R222H or R622H rst stage
regulator. 40 psi / 2.8 bar when used with any other
rst stage regulator.
Temperature Capabilities
R122H, R222H, R222, R232A and R232E Series:
-20 to 160°F / -29 to 71°C
Pressure Registration
Internal
1. In the event the R222 Series malfunctions during a Maximum Emergency Inlet Pressure condition these inlet pressures and the R222 Series relief performance will limit downstream
pressure to 2 psi / 0.14 bar or less.
2. Product has passed Fisher testing for lockup, relief start-to-discharge and reseal down to -40ºF / -40ºC.
(1)
: 75 psi / 5.2 bar when used with a
(2)
Outlet Pressure Standard Setpoint
R222H Series: 10 psi / 0.69 bar or 5 psi / 0.35 bar
R122H Series: 10 psi / 0.69 bar
R222 Series: Second Stage: 11 in. w.c. / 27 mbar
R232A Series: First Stage: approximately 9 psig /
0.62 bar at 100 psig / 6.9 bar, 50 SCFH / 1.42 Nm3/h
Second Stage: 11 in. w.c. / 27 mbar
R232E Series: First Stage: 9 psig / 0.62 bar at
100 psig / 6.9 bar, 50 SCFH / 1.42 Nm3/h
Second Stage: 2 psig / 0.14 bar
Outlet Pressure Spring Ranges
R222H Series: 8 to 11.9 psig / 0.55 to 0.82 bar or
4 to 6 psig / 0.28 to 0.41 bar
R122H Series: 10 psig / 0.69 bar +/- 1 psig / 0.07 bar
(non-adjustable)
R222 Series: Second Stage: 9.5 to 13 in. w.c. /
24 to 32 mbar
R232A Series: First Stage: non-adjustable
Second Stage: 10.2 to 13 in. w.c. / 25 to 32 mbar
R232E Series: First Stage: non-adjustable
Second Stage: 1 to 2.2 psig / 0.07 to 0.15 bar
Approximate Weights
R222H Series with POL: 2.12 lbs / 961.8 g
R222H Series with NPT tting: 1.73 lbs / 784.8 g
R122H Series: 1.2 lbs / 544 g
R222 Series: 1.4 lbs / 635 g
R232A and R232E Series with POL:
1.9 lbs / 865 g
R232A and R232E Series with NPT tting:
1.5 lbs / 671 g
Description
Second Stage Low Pressure Regulator
The Type R222 second stage regulator provides low
pressure, inches of water column, delivery pressure. It
is set at 11 in. w.c. / 27 mbar pressure and comes with
a high capacity internal relief valve. The regulators are
painted PALM GREEN.
Integral Two-stage Regulator
The Type R232A integral two-stage regulator contains
a non-adjustable rst stage regulator on the inlet. The
second stage provides 11 in. w.c. / 27 mbar outlet
pressure. The second stage portion has a high capacity
internal relief valve construction. The rst stage does not
have an internal relief valve. The regulators are painted
GRAY with a BLACK CAP.
2
Integral Two psig Service Regulator
The Type R232E integral two psig service regulator
contains a non-adjustable rst stage regulator on the
inlet. The second stage provides 2 psig / 0.14 bar outlet
pressure. The second stage portion has a high capacity
internal relief valve construction. The rst stage does not
have an internal relief valve. The regulators are painted
GRAY with a WHITE CAP.
First Stage Regulators
Types R122H and R222H regulators are designed for
high pressure (pounds per square inch) vapor service.
These regulators have high capacity internal relief valves.
When used on rst stage service, the Type R122H regulator
reduces container pressure to approximately 10 psig /
0.69 bar inlet pressure to a second stage regulator. The
Type R222H regulator reduces container pressure to
R122H, R222H, R222, R232A and R232E Series
VENT POINTED DOWN
LP-Gas Regulators
3 FT. /
3
VENT POINTED DOWN
VENT POINTED DOWN
T14446-A2
Figure 2. Regulator with Vent Pointed Down
Table 1. Relief Valve Specications
NOMINAL RELIEF VALVE
START-TO-DISCHARGE
TYPE
TYPICAL SETPOINT
psi bar psi bar psig bar psig bar
R122H 10 0.69 16 1.10 250 17.2 Not Applicable
R222H
5 0.35 9 0.62
10 0.69 16 1.10
R222 11 in. w.c. 27 mbar 1 0.07 30 2.07 2.0 0.14
(1)
R232A
(1)
R232E
1. For integral two-stage regulators, the second stage disc is removed.
11 in. w.c. 27 mbar 1 0.07
2 0.14 3.5 0.24 5.0 0.35
MAXIMUM OUTLET PRESSURE WITH DISC REMOVED
Inlet Pressure Maximum Outlet Pressure
250 17.2 Not Applicable
250 17.2
0.9 m
2.0 0.14
Table 2. Capacity, Connection Sizes and Vent Orientation
REGULATOR
APPLICATION
TYPE
NUMBER
CAPACITY
BTU/HR
PROPANE
(1)
INLET
CONNECTION
OUTLET
CONNECTION
First Stage R122H-AAJ 1,100,000 1/4 in. FNPT 1/2 in. FNPT 10 psig / 0.69 bar Over Outlet
R222H-BGK 1,700,000 1/2 in. FNPT 1/2 in. FNPT
R222H-DGK 2,000,000 3/4 in. FNPT 3/4 in. FNPT
R222H-HGK 1,700,000 FPOL 1/2 in. FNPT
First Stage
R222H-JGK 1,875,000 FPOL 3/4 in. FNPT
R222H-BGJ 1,800,000 1/2 in. FNPT 1/2 in. FNPT
R222H-DGJ 2,000,000 3/4 in. FNPT 3/4 in. FNPT
R222H-HGJ 1,800,000 FPOL 1/2 in. FNPT
R222H-JGJ 1,875,000 FPOL 3/4 in. FNPT
Second Stage
Integral
Two-Stage
Integral Two psig
Service
1. Capacities Based on:
Second Stage: 10 psig / 0.69 bar with 2 in. w.c. / 5 mbar droop.
Integral Two Stage: 30 psig / 2.07 bar and 2 in. w.c. / 5 mbar droop.
Integral Two psig Service Regulator: 30 psig / 2.07 bar inlet pressure and 20% droop.
First Stage: 30 psig / 2.07 bar inlet pressure and 20% droop.
2. Also available with vent opposite gauge taps.
3. Integral First Stage Vent size: 7/16-24 UN thread for 1/4 in. OD copper tube inverted are tting.
R222-BAF
R222-BAFXA Over Outlet
R232A-BBF
R232A-HBF FPOL
R232A-BBFXA
R232A-HBFXA FPOL
R232E-BBH
R232E-HBH FPOL
650,000 1/2 in. FNPT 1/2 in. FNPT
550,000
550,000
500,000
1/4 in. FNPT
1/4 in. FNPT
1/4 in. FNPT
1/2 in. FNPT
1/2 in. FNPT
1/2 in. FNPT 2 psig / 0.14 bar
OUTLET
PRESSURE
SETTING
5 psig / 0.35 bar
10 psig / 0.69 bar
11 in. w.c. /
27 mbar
3/8 IN. FNPT SCREENED VENT
STANDARD LOCATION
Over Outlet
Over Inlet
First Stage
Second Stage: Over Outlet
First Stage: Opposite Gauge Taps
Second Stage: Opposite Gauge Taps
First Stage
Second Stage: Over Outlet
(3)
: Down
(3)
: Down
(2)
3
R122H, R222H, R222, R232A and R232E Series
LP-Gas Regulators
T14447-A2
Figure 3. Tank Installation
approximately 10 psig / 0.69 bar or 5 psig / 0.35 bar inlet
pressure to a second stage regulator. On nal stage service
the regulator reduces container pressure for a high pressure
burner. The regulator is painted RED.
Installation
WARNING
!
All vents should be kept open to permit free
ow of air in and out of the regulator. Protect
vent openings against the entrance of rain,
snow, ice formation, paint, mud, insects,
water from an irrigation system or any other
foreign material that could plug the vent or
vent line or accumulate in the vent line.
LP-Gas may discharge to the atmosphere
through the vent. An obstructed vent
which limits air or gas ow can cause
abnormally high pressure that could result
in personal injury or property damage.
The Types R232A, R232E, R122H and R222H
are not suitable for indoor installations.
Failure to use a vent line with Type R222
second stage regulators in indoor
applications can cause a hazardous
accumulation of gas which could result in
personal injury or property damage.
Never use the Types R122H, R222H and
R232E (pounds-to-pounds) regulators on
low pressure (inches of water column)
service because personal injury or property
damage could occur.
General Installation Instructions
Before installing the regulator,
• Check for damage, which might have occurred
in shipment.
• Check for and remove any dirt or foreign material,
which may have accumulated in the regulator body.
• Replace old pigtails. Blow out any debris, dirt or
copper sulfate in the copper tubing and the pipeline.
• Apply pipe compound to the male threads of the pipe
before installing the regulator.
• Make sure gas ow through the regulator is in the
same direction as the arrow on the body. “Inlet” and
“Outlet” connections are clearly marked.
Installation Location
• The installed regulator should be adequately
protected from vehicular trafc and damage from
other external sources.
• Install the regulator with the vent pointed vertically
down, see Figure 2. If the vent cannot be installed
in a vertically down position, the regulator must be
installed under a separate protective cover. Installing
the regulator with the vent down allows condensation
to drain, minimizes the entry of water or other debris
from entering the vent and minimizes vent blockage
from freezing precipitation.
• Do not install the regulator in a location where there
can be excessive water accumulation or ice formation,
such as directly beneath a down spout, gutter or roof
line of building. Even a protective hood may not provide
adequate protection in these instances.
4
R122H, R222H, R222, R232A and R232E Series
LP-Gas Regulators
TO APPLIANCE
VENT ASSEMBLY
BASEMENT
FROM FIRST STAGE
REGULATOR
T14445-A2
GRADE GROUND DOWNWARD AND
SLOPING AWAY FROM HOUSING DOME.
THIS PREVENTS WATER COLLECTING
AND RUNNING INTO OR STANDING
AROUND HOUSING DOME.
VENT LINE
Figure 4. Basement Installation
END OF REGULATOR VENT TUBE
LOCATED AT TOP INSIDE OF HOUSING
DOME COVER
VENT OPENING MUST BE
AT LEAST 3 FT. / 0.9 m
HORIZONTALLY FROM ANY
BUILDING OPENING BELOW IT
2 IN. / 5.1 cm
MINIMUM
T14448-A2
REGULATOR ADJUSTMENT CLOSURE
CAP MUST BE TIGHT
WATER MARK LEFT IN HOUSING DOME AT LEVEL ABOVE REGULATOR VENT, OR END OF VENT TUBE
REQUIRES REPLACEMENT OF REGULATOR. INSTALL REGULATOR PROPERLY.
Figure 5. Underground Installation
5
R122H, R222H, R222, R232A and R232E Series
LP-Gas Regulators
• Install the regulator so that any gas discharge
through the vent or vent assembly is over 3 ft. / 0.9 m
horizontally from any building opening below the level
of discharge.
• Install the regulator high enough above ground level - at
least 18 in. / 46 cm - so that rain splatter cannot freeze
in the vent.
Regulators Subjected to Heavy
Snow Conditions
Some installations, such as in areas with heavy snowfall,
may require a hood or enclosure to protect the regulator
from snow load and vent freeze over.
Horizontally Installed Regulators
Horizontally mounted regulators, such as found in single
cylinder installations and ASME tanks, must be installed
beneath a protective cover or under the ASME tank
dome, refer to Figure 3. If possible, slope or turn the vent
down sufciently to allow any condensation to drain out of
the spring case. Be careful that the slot in the tank dome
or protective cover for the regulator’s outlet piping does
not expose the vent to the elements. The rst stage vent
on the Types R232A and R232E should be pointed down.
Indoor Installations
The Types R122H, R222H, R232A and R232E regulators
are not recommended for indoor installations. The
Type R222 regulator may be installed indoors as follows.
By code, regulators installed indoors have limited inlet
pressure and they require a vent line to the outside of the
building, see Figure 4. A vent assembly, such as Fisher®
Y602 Series, should be used on the end of the vent line.
The same installation precautions, previously discussed
throughout this manual for the regulator vent, apply to the
end of the vent tube assembly. Vent lines must not restrict
the gas ow from the regulator’s internal relief valve. Vent
lines should be at least 3/4 in. NPT pipe or 3/4 in. NPT
size, Gray PVC Schedule 40 Rigid Non-metallic Electrical
Conduit for above Ground Service, per UL
the vent line, remove the vent screen and apply a good
grade of pipe dope to the male threads of the line. Vent
lines should be as straight as possible with a minimum
number of bends.
®
651. To install
Underground Installations
WARNING
!
Types R232A and R232E integral regulators
require 2 vent tubes, one on the rst stage
vent and one on the second stage vent,
when installed on underground tanks.
UL® is a mark owned by Underwriters Laboratories.
Failure to use 2 separate vent tubes can
result in early regulator failure and/or over
pressuring the second stage that could
result in res or personal injury.
A regulator installed in the dome of an underground
container requires a vent tube to prevent water from
entering the regulator spring case, see Figure 5.
The Types R122H and R222H will require one vent line
and if the Types R232A and R232E integral regulators is
installed on an underground tank the use of 2 vent tubes
are required, one for the rst stage vent (1/4 in. OD copper
tube inverted are connection: 7/16-24 UN thread) and the
other for the second stage vent (3/8 NPT) of the regulator,
are required.
Remove the vent screen(s) and install vent tube(s). The
vent tube must be run from the regulator vent(s) to above
the maximum water table. The vent tube opening(s) must
terminate at the extreme top inside of the dome cover.
Make sure the regulator’s closing cap is on tightly and
maintain drainage away from the dome at all times.
Outdoor Installations with Underground
Vent Lines
When installed per code, the underground vent line must
not restrict the gas ow from the regulator’s internal
relief valve and must remain clear of debris, dry and fully
open at all times. Joints in the vent line must be fully
sealed to prevent moisture intrusion into the vent line. A
vent assembly, such as the Fisher Y602 Series, should
be used on the end of the vent line to prevent entry of
precipitation, water or other debris. When underground
vent lines are used in humid environments, the vent line
must be designed to allow for proper drainage of any
collected moisture or condensation.
Adjustment
Each regulator is factory set. If it becomes necessary to
increase the outlet pressure, remove the closing cap and
turn the adjustment screw clockwise. Turn the adjusting
screw counterclockwise to decrease the outlet pressure.
The rst stage portion of the Types R232A and R232E
integral regulators is non-adjustable.
The inlet and outlet pressure tap plugs on the R122H,
R222H, R222, R232A and R232E Series regulators may
be removed using a 7/16 in. / 11 mm hexagon wrench.
The pressure tap is restricted, so the plug can be removed
with pressure in the regulator. Install a pressure gauge to
determine the regulator’s inlet pressure and outlet setting
during adjustment, (Actual pressure at the second stage
regulator may be less due to line loss.). After setting, add
thread sealant to the 1/8 in. NPT pipe plug. Reinstall the
pipe plug by threading it into the gauge port nger-tight and
then wrench tighten the plug 1-1/2 to 3 turns past nger
tight (approximate maximum torque of 12 ft-lbs / 16 N•m).
Replace the closing cap. Check the plug for leakage.
6
R122H, R222H, R222, R232A and R232E Series
LP-Gas Regulators
Overpressure Protection
WARNING
!
Some type of overpressure protection is
needed if actual inlet pressure can exceed
the outlet pressure rating. Overpressuring
any portion of this equipment above the
limits shown in the Specications may
cause damage to regulator parts, leaks
in the regulator or personal injury due to
bursting of pressure-containing parts or
explosion of accumulated gas.
If any portion of the regulator is exposed
to an overpressure condition that exceeds
the limits in the Specications, it must
be inspected for damage that may
have occurred.
Large volumes of gas may discharge
through the regulator vent during internal
relief valve operation, which can, if not
controlled, result in re or explosion from
accumulated gas.
The R122H, R222H, R222, R232A and R232E Series
regulators, except for the rst stage of the Types R232A
and R232E, contain internal relief valves. The internal
relief valve in all units will give overpressure protection
against excessive build-up resulting from seat leakage
due to worn parts or chips or foreign material on the
orice. The amount of internal relief protection provided
varies with the regulator type and the cause for the
overpressure relief valve operation, see Table 1. When
the internal relief valve opens, gas escapes to the
atmosphere through the regulator’s vent.
Some type of additional external overpressure
protection must be provided if the outlet pressure in an
overpressure condition exceeds the inlet pressure rating
of the gas system or downstream equipment. Common
methods of external overpressure protection include
relief valves, monitoring regulators, shutoff devices and
series regulation.
Maintenance
Regulators that have been disassembled
for repair must be tested for proper
operation before being returned to service.
Only parts manufactured by Fisher® should
be used for repairing Fisher regulators.
Relight pilot lights according to normal
startup procedures.
Due to normal wear or damage that
may occur from external sources,
these regulators must be inspected and
maintained periodically. The frequency
of inspection and replacement of the
regulators depends upon the severity of
service conditions or the requirements of
local, state and federal regulations. Even
under ideal conditions, these regulators
should be replaced after 20 years from
date of manufacture or sooner should
inspection reveal the need.
Visually inspect the regulator each time a
gas delivery is made for:
• Improper installation, vent not pointed vertically down or
under a cover; no vent tube on underground systems
• Plugged or frozen vent
• Wrong regulator or no regulator in the system
• Internal or external corrosion, including paint chipping
or aking
• Flooded Regulator; water in spring case; regulator
submersed on underground tanks
• Regulator age
• Any other condition that could cause the uncontrolled
escape of gas
Failure to do the above could result in personal injury or
property damage.
Vent Opening
Make sure the regulator vent, vent assembly or vent
tube does not become plugged by mud, insects, ice,
snow, paint, etc. The vent screen aids in keeping the vent
from becoming plugged and the screen should be clean
and properly installed. Make sure any irrigation system
operated near a regulator or vent line does not spray water
into the vent opening of the regulator or vent assembly.
WARNING
!
To avoid personal injury or equipment
damage, do not attempt any maintenance
or disassembly without rst isolating
the regulator from system pressure and
relieving all internal pressure.
Water inside Regulators from Floods,
Weather or Water Table on
Underground Systems
Replace any regulator that had water in their spring
case, has been ooded, has been submersed below the
water table of an underground tank or shows evidence
of external or internal corrosion. Checking for internal
7
R122H, R222H, R222, R232A and R232E Series
LP-Gas Regulators
corrosion on the Type R222H/R222 and the second
stage portions of the Types R232A and R232E can be
done by removing the closing cap and with the aid of
a ashlight observing the condition of the relief valve
spring, main spring and internal spring barrel area. A
more detailed examination will require shutting down the
gas system and the complete removal of the adjusting
screw. The Type R122H regulator must be completely
disassembled by a qualied person to look for internal
corrosion. Closely examine regulators installed with
their vent horizontal for signs of corrosion. Correct any
improper installations.
Regulator Replacement
Older regulators are more likely to catastrophically fail
because of worn or corroded parts. Replace R122H,
R222H, R222, R232A and R232E Series regulators
over 20 years of age. Other service or environmental
conditions may dictate replacement of the regulator
before it becomes 20 years old. Regulators that are
installed in corrosive environments including but not
limited to the following conditions should be inspected
annually for visual indication of external or internal
corrosion and paint chipping or aking. Regulators in
these applications may require replacement sooner and
must be replaced if corrosion is evident:
• Regulators that are installed in areas subject to sea
salt (coastal) atmosphere
• Regulators that are installed on underground systems
• Regulators installed with underground vent piping
• Regulators that are used in installations where the gas
system is only operated and pressurized intermittently
Refer to Fisher® Bulletin LP-32 for additional information.
Regulator Repair
Regulators that have been disassembled for repair
must be tested for proper operation before being
returned to service. Only parts manufactured by Fisher
should be used to repair Fisher regulators. Be sure to
give the complete type number of the regulator when
corresponding with the factory.
The type number, orice size and spring range are
on a label attached to the spring barrel. The date of
manufacture is stamped on the regulator. Always provide
this information in any correspondence with your Fisher
Distributor regarding replacement parts or technical
assistance. If construction changes are made in the eld,
be sure that the regulator marking is also changed to
reect the most recent construction.
LPG Equipment
Emerson Process Management
Regulator Technologies, Inc.
USA - Headquarters
McKinney, Texas 75070 USA
Tel: +1 800 558 5853
Outside U.S. +1 972 548 3574
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.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or
guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specications of such
products at any time without notice.
Emerson Process Management Regulator Technologies, Inc. does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and
maintenance of any Emerson Process Management Regulator Technologies, Inc. product remains solely with the purchaser.
©Emerson Process Management Regulator Technologies, Inc., 2005, 2015; All Rights Reserved
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