Instruction Manual

ManualsBrandsEmerson ManualsRegulators and Relief ValvesEmerson 912 Series Pressure Reducing Regulators for LP-Gas Service

Low Pressure Regulators

D450023T012

Instruction Manual

Form MCK-1106

June 1986

www.FISHERregulators.com/lp

Single and Second-Stage LP-Gas Regulators

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. 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.

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 can

be 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 leak develops in

the system, only qualiﬁe

d gas serviceman should install or

service the regulator.

Introduction

Scope of Manual

This instruction manual covers installation and maintenance

for the following single and second-stage LP-gas regulators:

Types 912, R322 (integral two-stage), R352, R722, R922,

R932, and S102L.

Description

All the regulators are designed for low pressure

(inches of water column) vapor service and are not to be

used for liquid service. Their ou

tlet pressure setting is

usually 11-inches w.c (27 mbar).

Single-stage regulators (reducing container pressure

to 11-inches w.c. (27 mbar)) are normally painted gray

while second-stage regulators (reducing the outlet

of a ﬁrst-stage regulator to 11-inches w.c. (27 mbar))

are normally painted palm green. The units differ in

construction and capacity rating.

Speciﬁcations

The Speciﬁcations table lists the speciﬁcations for the

regulators. Contact the factory if the regulators are to be

used on any service other than LP-gas, natural gas, or

air. Temperature li

mits are -20° to 160° F (-29° to 71° C).

Second-stage regulators are limited to 20 psig (1,4 bar) inlet

pressure and must be used with a ﬁrst-stage regulator.

Installation

All vents should be kept open to permit

free ﬂow of air into and out of the regulator.

Protect openings against the entrance of

rain, snow, ice formation, paint, mud, insects,

or any other foreign material that could plug

the vent of vent line.

Figure 1. Typical Regulator Conﬁgurations

OUTLET

CLOSING

CAP

VENT CAN BE

OVER INLET

OR OUTLET

INLET

OUTLET

CLOSING

CAP

VENT CAN BE PLACED IN

POSITION C, D, E, OR F

VENT

WARNING

Summary of content (4 pages)

PAGE 1
Low Pressure Regulators Instruction Manual Form MCK-1106 June 1986 Single and Second-Stage LP-Gas Regulators WARNING OUTLET C VENT VENT CAN BE PLACED IN POSITION C, D, E, OR F CLOSING CAP CLOSING CAP Only personnel trained in the proper procedures, codes, standards, and regulations of the LP-gas industry should install and service this equipment.
PAGE 2
Low Pressure Regulators Speciﬁcations TYPE NUMBER SIZE, INCH FNPT TYPE OF SERVICE MAXIMUM INLET PRESSURE, PSIG (bar) VAPOR CAPACITY, BTU/HR. PROPANE 350,000* INLET CONNECTION OUTLET CONNECTION 912† 1/4 1/4 or 3/8 Single-Stage 250 (17,2) R322 1/4 1/2 or 3/4 Integral Two-Stage 250 (17,2) 660,000 R352 3/4 3/4 Second-Stage 20 (1,38) 1,250,000 3/4 or F. POL 3/4 Single-Stage 250 (17,2) 4,250,000 3/4 3/4 Second-Stage 20 (1,38) 2,500,000 1/4, 1/2 or F.
PAGE 3
Low Pressure Regulators GRADE AROUND DOWNWARD AND AWAY AROUND HOUSING DOME. THIS PREVENTS WATER COLLECTING AND RUNNING INTO OR STANDING AROUND HOUSING DOME. END OF REGULATOR VENT TUBE LOCATED AT TOP INSIDE OF HOUSING DOME COVER. 2-INCHES (51 mm) MINIMUM 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. THEN CORRECT INSTALLATION. Figure 4.
PAGE 4
Low Pressure Regulators local, state, and federal regulations. Even under ideal conditions, these regulators should be replaced after 15 years from the date of manufacture or sooner should inspection reveal the need. PLACE PROTECTIVE CAP ON VENT PIPE Visually inspect the regulator each time a gas delivery is made for: TYPE 289 SERIES 1. Improper installation. 2. Plugged or frozen vent. 3. Wrong regulator or no regulator in the system. 4. Internal or external corrosion. 5. Age of the regulator. 6.