State Industries GPO 86-199 User Manual

MODELS GPO 86-199 THRU GPO 69-700(A)

COMMERCIAL OIL FIRED W ATER HEATER FOR HOT W ATER SUPPL Y

• Installation • Operation • Service • Maintenance

CAUTION

TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION
RELATIVE TO YOUR SAFETY. PLEASE READ THOUROUGHLY
BEFORE USING APPLIANCE.

500 Lindahl Parkway

Ashland City, TN 37015

www.stateind.com

PLACE THESE INSTRUCTIONS ADJACENT TO HEA TER AND

PRINTED IN U.S.A. 0303 PART NO.195092-000

NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.

1

FEATURES AND SPECIFICATIONS

TEXT PRINTED OR OUTLINED IN RED CONTAINS INFORMATION
RELATIVE TO YOUR SAFETY. PLEASE READ THOROUGHL Y BEFORE
USING APPLIANCE.

This is a typical oil-fired heater for commercial water heating applications.

The principal components of the heater are shown and identified here.
The identification plate illustrations on page 4 interpret certain markings
into useful information. Use these reference to identify the heater and its
components

FIGURE 1

T ABLE 1 NOMINAL MODEL DIMENSIONS

GPO 86-199 GPO 86-245 GPO 84-315(A) GPO 75-385(A) GPO 75-455(A) GPO 69-700(A)

Model

Dim. Inches mm Inches m m Inches mm Inches mm Inches mm Inches mm

A 74 1/2 1,892 74 1/2 1,892 74 1/2 1,892 73 3/4 1,873 73 3/4 1,873 73 3/4 1,873
B 36 3/4 933 36 3/4 933 36 3/4 9 33 36 3/4 933 36 3/4 93 3 36 3/4 933
C 27 3/4 705 27 3/4 705 27 3/4 7 05 27 3/4 705 27 3/4 70 5 27 3/4 705
D 2 51 2 51 2 51 2 51 2 51 2 51
E 3/4 NPT 3/4 NPT 3/4 NPT 3/4 NPT 3/4 NPT 3/4 NPT
F 8 203 8 203 8 203 8 203 8 203 10 254
G 26 5/8 676 26 5/8 6 76 26 5/8 676 24 3/4 6 29 24 3/4 629 30 3/16 767
H 74 1/2 1,892 74 1/2 1,892 74 1/2 1,892 73 3/4 1,873 73 3/4 1,873 79 3/16 2,011
J 1 1/2 NPT 1 1/2 NPT 1 1/2 NPT 1 1/2 NPT 1 1/2 NPT 1 1/2 NPT
K 1 1/2 NPT 1 1/2 NPT 1 1/2 NPT 1 1/2 NPT 1 1/2 NPT 1 1/2 NPT
L 22 3/4 578 22 3/4 57 8 22 3/4 578 23 7/16 595 23 7/16 595 28 7/8 733

Approx.

Shipping 553 251 554 252 554 252 624 283 700 318 739 335

Weight STD. Lbs Kg. Lbs. Kg. Lbs. Kg. Lbs. Kg. Lbs. Kg. Lbs. Kg.

Approx.

Shipping 657 298 742 337 747 339 822 373

Weight ASME --- --- --- --- Lbs. Kg. Lbs. Kg. Lbs. Kg. Lbs. Kg.

ALL DIMENSIONS IN INCHES/mm
*Model numbers followed by the suffix "A" indicates the optional A.S.M.E. tank construction.

T ABLE 2 RECOVERY CAPACITIES, based on 80% efficiency

TANK APPROX U.S Gallons/Hr. and Litres/Hr at TEMPERATURE RISE INDICATED

Model Btuh KW U.S.Gal. Litres % C° 22.2C° 27.7C° 33.3C° 38.8C° 44.4C° 50C° 55.5C° 61.1C° 66.6C° 72.2C° 77.7C°

GPO 199,000 86 80 GPH 477 381 318 272 238 212 191 173 159 147 136

86-199 58 326 LPH 1804 1443 1203 1031 902 802 722 656 601 555 516

GPO 245,000 86 80 GPH 587 469 391 335 293 261 235 213 196 181 168

86-245 72 326 LPH 2221 1777 1481 1269 1111 987 889 808 740 683 635

GPO 315,000 84 80 GPH 754 604 503 431 377 335 302 274 251 232 216

84-315(A) 92 318 LPH 2856 2285 1904 1632 1428 1269 1142 1039 952 879 816

GPO 385,000 75 80 GPH 922 738 615 527 461 410 369 335 307 284 263

75-385(A) 1 13 284 LPH 3491 2793 2327 1995 1745 1551 1396 1269 1164 1074 997

GPO 455,000 75 80 GPH 1090 872 727 623 545 484 436 396 363 335 311

75-455(A) 133 284 LPH 4125 3300 2750 2357 2063 1833 1650 1500 1375 1269 1179

GPO 700,000 69 80 GPH 1677 1341 1118 958 838 745 671 610 559 516 479

69-700(A) 205 261 LPH 6347 5077 4231 3627 3173 2821 2539 2308 2116 1953 1813

* All tanks are tested at 320 psig working pressure.
** Based on No. 2 fuel oil with a heat content of 140,000 Btu's per gallon at 80% thermal efficiency. Above 2,000 altitude, input
ratings should be reduced 4% for each 1000' above sea level.

CAPACITY EFF. F° 40F° 50F° 60F° 70F° 80F° 90F° 100F° 110F° 120F° 130F° 140F°

2

TABLE OF CONTENTS

FEATURES AND SPECIFICATIONS ................................................... 2

APPROVALS ....................................................................................... 3

IDENTIFICATION

Oil and Burner Nameplate Decal ...............................................3

Oil Burner Specifications............................................................ 4

SAFETY ............................................................................................... 4

INSTALLATION

Required Ability.......................................................................... 4

General ...................................................................................... 4

Uncrating ...................................................................................4

Leveling .....................................................................................4

Location ..................................................................................... 4-5

Clearances................................................................................. 5

Combustion and Ventilation Air.................................................. 5

Chemical Vapor Corrosion .........................................................5-6

Flue Gas Venting ....................................................................... 6

Vent Connector and Draft Regulator .......................................... 6

Water Piping .............................................................................. 7

Closed Water System ................................................................ 7

Drain Valve and Access Panels ................................................. 7

Fuel Systems ............................................................................. 7-8

Burner Installation ...................................................................... 8-9

Fuel Pump .................................................................................9

Wiring Diagrams ........................................................................ 9

OPERATION

General ...................................................................................... 10

Filling .........................................................................................10

Start Up...................................................................................... 10

Water Temperature Control ........................................................ 10

APPROVALS

The burner and controls are listed by Underwriters' Laboratories, Inc.
Accordingly, the burner bears one of the UL labels indicating periodic
inspection of the production of this equipment.

High Limit Switch E.C.O............................................................. 10-11

Burner Certificate (Combustion T est) .........................................11

Draining .....................................................................................11

MAINTENANCE

General ...................................................................................... 11

Relief Valves ..............................................................................11

Flushing ..................................................................................... 12

Sediment Removal .................................................................... 12

Lime Scale Removal .................................................................. 12-13

Circulating Pump .......................................................................13

Soot Removal ............................................................................ 13

Vent System............................................................................... 13

Anode Rod Inspection................................................................ 13

INSTALLATION DIAGRAMS ............................................................... 14-19

CHECKLIST AND SERVICE INFORMA TION

Electrical Wiring Replacement ................................................... 19

Not Enough or No Hot Water ..................................................... 19-20

Burner Starts - Won't Operate.................................................... 20

Water Too Hot ............................................................................ 20

Water Heater Makes Sounds .....................................................20

Water Leakage is Suspected .....................................................20

Burner Won't Start .....................................................................20

Burner Starts But Fails To Run................................................... 20

Normal Start, But Locks Out On Safety...................................... 21

Safety Primary Control ............................................................... 21

COMBUSTION TEST SPECIFICA TIONS ............................................ 21

TROUBLESHOOTING ......................................................................... 22

REPLACEMENT PARTS LIST .............................................................23-24

All ASME tanks are built to the standards of Section IV of the American
Society of Mechanical Engineers code and are stamped with their symbol.
The National Board of Boiler and Pressure Vessel Inspectors papers are
furnished upon request. The NB number and HLW symbol (to the right)
are on the plate located just below cleanout on tank. (May be viewed by
removing cleanout cover on jacket).

IDENTIFICATION

The heater and burner rating plates or labels provide valuable information
to the installer and servicer. When ordering parts or inquiring about a
unit, be sure to include all information from the plates. See the picture on
page 2 for approximate location of the heater rating plate.

The heater model number is structured as follows:

stage pump respectively, should match letter "O" or "T" of the heater
model.

If these codes do not match, the oil burner may not be the correct model
for the heater model purchased, Contact your State dealer for further
information and replacement , if required.

OIL BURNER NAMEPLA TE DECAL

The oil burner's nameplate decal (see page 2 for the approximate location
on the burner) contains a burner KBTU/H input which should exactly match
the model input appearing on the first line of the heater's rating plate. The
oil burner series 940 or 941 indicates the burner equipped w/single or two

A TYPICAL OIL BURNER NAMEPLA TE DECAL

FIGURE 2

3

OIL BURNER SPECIFICATIONS

INSTALLATION

The oil burner nameplate decal includes a series code which identifies
the major features of the oil burner. The series number is the last three
digits of the burner code number.

Table 3 below describes the oil burner characteristics for each series
number. The burners are to be used with fuel oil not heavier than No. 2.

TABLE 3 SOME NOTABLE OIL BURNER FEATURES

R.W. Suntec Nozzle Type

State Becket Safety Oil Pump Oil

Burner Burner Timing Typ e Pump

Series Model + Mode Spray Spray

Number* Number Pattern Angle

A2VA

AFG 71 18 Type B

940 15 Sec. Single - Solid 80°

SF Stage A2YA- Cone

7916

B2VA

8216 Type B

941 AFG 15 Sec. Two- - Solid 80°

SF 15 Sec. Stage BY2A Cone

8916

* To provide the proper firing rate for each model heater , see SPECIFICATIONS:

there are burner models for each heater model in table 2.

+ All oil burners are UL defined as having "interrupted ignition" . . . meaning the

ignition is on during the flame establishing period only. Ignition is of f when the
burner is off. Standard safety timing is 15 seconds.

For installations where gravity feed of fuel oil from the storage tank to the
heater is practical, an oil burner with a single-stage oil pump can be used.
The 940 series of burners have single-stage pumps which are shipped
for installation of a supply line to the tank only. A return line back to the
storage tank can be installed, if required, by making a small modification
to the pump, see the oil burner installation manual.

For installations where gravity feed cannot be employed, (the storage
tank is located significantly below, or remote from, the heater) an oil burner
with a two-stage oil pump should be used. The 941 series of burners
have two-stage pumps which are shipped for installation of a supply and
return line to the tank. However, in situations where the return line is not
required (low lift installations), the pump may be modified to operate without
the line, see the oil burner installation manual.

IMPORTANT
The oil-fired water heater shipment consists of two packages, heater and
oil burner. Check to be certain the model number on the heater and oil
burner packages match. To assure matching equipment, see preceding
information.

GPO 86 GPO86 GPO 84 GPO 75 GPO 75 GPO 69

Model Heater 199 245 315/315A 385/385A 455/455A 700/700/A

Min. State

Firing Burner 1.42 1.75 2.25 2.75 3.25 5.0

Rate

In Non

GPH State 1.1 1.5 2.0 2.5 3.0 4.5

Burner

SAFETY

DANGER

BE SURE TO TURN OFF POWER WHEN WORKING ON OR NEAR
THE ELECTRICAL SYSTEM OF THE HEATER. NEVER TOUCH
ELECTRICAL COMPONENTS WITH WET HANDS OR WHEN
STANDING IN W A TER. WHEN REPLACING FUSES AL W A YS USE THE
CORRECT SIZE FUSE FOR CIRCUIT.

If it is necessary to reset the safety primary control, depress red button
one time only. If burner does not operate after depressing red button
one time, call serviceman.

REQUIRED ABILITY

INSTALLATION OF SERVICE OF THIS WATER HEATER REQUIRES
ABILITY EQUIVALENT TO THAT OF A LICENCED TRADESMAN IN
THE FIELD INVOLVED. PLUMBING, AIR SUPPLY, VENTING , OIL
BURNER AND ELECTRICAL WORK REQUIRED.

GENERAL

The installer should be guided by these instructions, local codes and the
following publications.

Standards for the Installation of Oil Burning Equipment, NFPA

•
Standard No. 31, Available from National Fire Protection
Association, Batterymarch Park, MA 02269.

•

Code for the Installation of Heat Producing Appliances,
Available from American Insurance Association, 85 John Street,
New York, NY 10038.

• The National Electrical Code , ANSI/NFPA No. 70-1996. Availability
same as NFPA Standard No. 31-1997.

• In Canada - CSA Standard No. B139, Installation Code for Oil Burning
Equipment.

When other than a State burner is used, this instruction manual can be
used as a general guide. The burner manufacturer's instructions will have
to be consulted on specific questions of wiring, air adjustment, etc.

Do not test the burner or control system before the heater is filled with
water. Follow the START-UP procedure in this manual.

UNCRATING

Uncrate the heater by removing the outside mat and top locator. The
shipping pallet must be removed from the unit. It may be possible to
simply unbolt the base from the pallet and, with the help of two or more
persons, work the unit off the pallet. Some units will be too heavy and will
require the use of jacks or lifting equipment. Safely remove the pallet
and move the unit into position. Be Careful When Moving This Heater. It
will tip over easily.

LEVELLING

Install the heater plumb to the ground. If it is necessary to adjust the
heater, use metal shims under the channel type skid base.

LOCATION

The water heater should not be installed where the combustion air is
contaminated, see COMBUSTION AND VENTILATING AIR. Temperature
in the location must be above 32°F (0°C) and free of combustible dusts
and flammable gases or vapors.

For the best installations, the water heater should be located:

1. On a level surface.

• Shim the channel type skid base as necessary If leveling is required.

2. Near a floor drain.

• The heater should be located in an area where leakage of the tank
or connections will not result in damage to the area adjacent to the
heater or to lower floors of the structure.

• When such locations cannot be avoided, a suitable drain pan should
be installed under the heater.

• The pan should be at least two inches deep, have a minimum length
and width of at least two inches greater than the diameter of the
heater and should be piped to an adequate drain. The pan must
not restrict combustion air flow.

4

• The discharge opening of the relief valve should always be piped
to an open drain.

• Choose the point of major hot water usage, fuel supply and chimney.

• Try to make hot water and oil piping as short as possible.

• Insulate hot and cold water piping where heat loss and condensation
may be a problem.

CLEARANCES

The heater has minimum clearances to combustible material, on a non­combustible floor of: 6 inches (152 mm) from the sides and rear, 24 inches
(610 mm) from the front, and 18 inches (457 mm) from the vent connector.
These clearances are, as shown in fig. 3A to prevent possible fire hazard
conditions.

At least 24" (610 mm) of top clearances are recommended for vertical
vent installation.

Allow sufficient room at rear of heater for servicing of T&P relief valve.
At least 24" (610 mm) should be provided at the front of the unit for

proper servicing.
Units which are to be installed on combustible flooring must be supported

by a full layer of hollow concrete blocks, fig. 3, from 8" (203 mm) to 12"
(305 mm) thick and extending 12" (305 mm) minimum beyond the heater
in all directions. The concrete blocks must provide an unbroken concrete
surface under the heater, with the hollows running continuous and
horizontally . A 3/16" (4.8 mm) steel plate must cover the concrete blocks,
see fig. 3.

PROPER INSTALLATION ON COMBUSTIBLE FLOORING

FIGURE 3

NOTE: If electrical conduits run under the floor of the proposed heater

location, insulate the floor as recommended above.

COMBUSTION AND VENTILA TION AIR

GENERAL

The water heater area should have sufficient air for satisfactory combustion
of oil, and proper venting and of safe ambient temperature.

When a heater is installed in an area where exhaust or ventilating fans
may create unsatisfactory combustion or venting, approved provisions
must be made to overcome the problem, see NFPA Standard No. 31,
Chapter 1.

CHEMICAL V APOR CORROSION

Water heater corrosion and component failure can be caused by the
heating and breakdown of airborne chemical vapors. Spray can
propellants, cleaning solvents, refrigerator and air conditioning refrigerants,
swimming pool chemicals, calcium and sodium chlorides, waxes, and
process chemicals are typical compounds which are potentially corrosive.
These materials are corrosive at very low concentration levels with little
or no odor to reveal their presence.

Products of this sort should not be stored near the heater. Also, air which
is brought in contact with the water heater should not contain any of
these chemicals. If necessary, uncontaminated air should be obtained
from remote or outside sources.

UNCONFINED SPACES (Building Construction)
NOTE: An unconfined space is defined as a space whose volume is not

less than 50 ft3 per 1000 BTUH (4.83m3 per kW) of total input of
allfuel burningappliances installed in that space. The unconfined
space may be thought of as extending to all areas which cannot
be separated by a door or door(s). All other spaces not fitting this
description, should be thought of as confined space.

1. In unconfined spaces in buildings of conventional frame, brick or stone
construction, infiltration will normally supply an adequate amount of
air for combustion and ventilation.

2. If the unconfined space is within a building of tight construction, eg.
weather stripping, heavy insulation, caulking, vapor barrier, ect., air
infiltration may be insufficient to support proper combustion and
ventilation, air shall be obtained from outdoors or from spaces freely
communicating with the outdoors.

• Follow the instructions under Part 2 of Confined Spaces (Room

Construction)

CONFINED SPACES (Room Construction)

1. All air from inside building (conventionally constructed buildings only):

The confined space shall be provided with the two permanent openings,
one within 12" (305 mm) of the ceiling and one within 12" (305 mm) of
the floor, fig. 4.

PROPER INSTALLATION CLEARANCES FOR TWO DIFFERENT

VENTING SYSTEMS

FIGURE 3A

* HOT WATER OUTLET LOCATION A T FRONT OF HEATER

• FACTORY FURNISHED HEATER MANIFOLD KITS (OPTIONAL)
ARE DESIGNED FOR 10" (254 mm) SPACING BETWEEN SIDES
OF ADJACENT UNITS.

REQUIRED AERA TION FOR APPLIANCE INST ALLA TION

IN A CONFINED SP ACE WITHIN A CONVENTIONALLY

CONSTRUCTED BUILDING

FIGURE 4

5

• When communicating with outdoors by means of vertical ducts,
each opening shall have a free area of not less than one square
inch per 4,000 Btu per hour (551 mm

2

/kW) (35 square inches per
gallon of oil consumed per hour) of total input rating of all appliances
in the enclosure.

• If horizontal ducts are used, each opening shall have a free area of
not less than one square inch per 2,000 Btu per hour
(1,101 mm

2

/kW) (70 square inches per gallon of oil consumed per

hour) of total input of all appliances in the enclosure, fig. 5.

APPLIANCE AERA TION FROM OUTDOORS (OPTIONAL

FOR CONVENTIONAL BUILDINGS, MANDA TOR Y

FOR TIGHT BUILDINGS)

FIGURE 5

TABLE 4 SUGGESTED VENT CONNECTOR SIZES

Outlet Diameter

Model Number Inches (mm)

GPO 86-199* 6 152.4

GPO 86-245 8 203
GPO 84-315/315A 8 203
GPO 75-385/385A 8 203
GPO 75-455/455A 8 203
GPO 69-700/700A 10 254

* These models are factory supplied with a flue reducer which should

be installed on the top cover.

In venting systems where a continuous or intermittent back (positive)
draft is found to exist, the cause must be determined and corrected. In
some cases, a special vent cap may be required.

If the back draft cannot be corrected by normal methods or if a suitable
draft cannot be obtained, a blower type flue gas exhauster must be
employed to assure venting and correct combustion.

Note: A negative draft must be maintained in the vent piping.
Connections shall not be to a chimney , vent or venting system served by

a power exhauster unless the connection is made on the negative pressure
side of the exhauster.

The barometric draft regulator must be installed in the same room as the
heater, fig. 6. Locate the regulator as close as possible to the heater and
at least 18" (457.2 mm) from a combustible ceiling or wall. A manually
operated damper should not be placed in the chimney connector.

FLUE GAS VENTING

In the absence of any local codes, regulations, or vent pipe or chimney
manufacturer's recommendations, for oil fired equipment, follow the
suggestions below for designing and installing a venting system.

For these water heaters, it is recommended that an adequate chimney
be used for venting the flue gases. Type B, double wall, vent pipe should
be used as the vent connector pipe. However, where no chimney is
available, vent pipe may be used to construct a vent.

Where an existing chimney or vent is to be used, be sure that the chimney
or vent has adequate capacity for the number and sizes of appliances
being vented through it. Inspect the chimney or vent and remove all soot
or other obstructions which will retard free draft.

VENT CONNECTOR AND DRAFT REGULA T O R

The chimney or vent connector diameter should be the same size as the
heater flue outlet, see T able 4. A minimum rise of 1/4" per foot (21mm/M)
of horizontal connector length must be maintained between the heater
and chimney opening, fig. 6. The connector length should be kept as
short as possible.

TABLE 5 - USUAL CHIMNEY SIZES FOR UNITS

Oil Equivalent Output Square & Rectangle

Firing Heat Input Heat Stack Round Stack Minimum

Model Rate Rate Rate Dimension Diameter Height

Number (GPH) (LPH) Btuh kW Btuh kW Inches mm Inches mm Feet Metres

GPO 86 -199 1.42 5.38 199,000 58 159,200 47 8 1/2 X 8 1/2 216 x 216 9 228.6 20 6.1
GPO 86 -245 1.75 6.62 245,000 72 196,000 57 8 1/2 X 8 1/2 216 x 216 9 228.6 20 6.1

GPO 84-315 (A) 2.25 8.52 315,000 92 252,000 74 8 1/2 X 13 216 x 330 10 254 30 9.1
GPO 75 -385 (A) 2.75 10.41 385,000 113 308,000 90 8 1/2 X 13 216 x 330 10 254 30 9.1
GPO 75 -455 (A) 3.25 12.30 455,000 133 364,000 107 13 X 13 330 x 330 12 304.8 35 10.7
GPO 69 -700 (A) 5 18.93 700,000 205 560,000 164 13 X 18 330 x 457 14 355.6 40 12.2

PROPER VENT CONNECTOR INST ALLATION

FIGURE 6

CHIMNEY

The oil-fired water heater must be connected to a chimney built in
accordance with accepted building code practice or listed factory built
type, Table 5. The exit point of the chimney flue gas must be at least 3'
(0.91 M) above the highest point where it passes through the roof of a
building. Also, it must be at least 2' (0.61 M) higher than any portion of a
building within 10' (3.05 M) of the chimney.

6

MULTIPLE HEATER FLUES

When two or more oil-fired water heaters are connected to a single chimney
or vent there shall be sufficient draft available for safe combustion and
removal of combustion products to the outdoors from each heater. Refer
to local codes for connection details.

Only one oil-fired water heater should be connected to any one type L
venting system.

A draft regulator shall be provided for each oil-fired water heater in a
multiple heater system.

DANGER

INCORRECT INSTALLATION CAN CAUSE IMPROPER OPERATION,
FIRE, ASPHYXIATION, SERIOUS PERSONAL INJURY OR DEATH.
NEVER OPERATE THIS WATER HEATER UNLESS IT IS PROPERLY
VENTED TO THE OUTDOORS AND HAS ADEQUATE COMBUSTION
AIR SUPPLY.

WATER PIPING

GENERAL

Select the piping diagram for the type of system to be installed from
pages 14 through 18. When a circulation pump is used in the system a
plug cock should be installed where indicated to regulate water flow through
the heater.

RELIEF VALVE

DRAIN V AL VE AND ACCESS PANELS

The heaters are equipped with a 3/4" NPT drain valve mounted above
and to the left of the oil burner, see FEATURES, page 2.

An access panel is located above and to the left of the oil burner and
covers the flame observation port, fig. 7. A plug is inserted into the flame
observation port and must be removed in order to look into the combustion
chamber. Always reinstall plug before replacing access panel.

COMBUSTION CHAMBER ACCESS PORT - FIGURE 7

Another access panel is located above and to the right of the oil burner,
fig. 8. This panel covers the cleanout opening in the tank which is sealed
by a gasket and cover.

An A.G.A. design-certified and A.S.M.E.-rated temperature and pressure
relief valve is installed in the water heater . The relief valve has a discharge
capacity exceeding the maximum heater input rating and a pressure rating
not exceeding the working pressure shown on the rating plate of the heater.

A temperature and pressure relief valve must also be installed on any
potable water storage tank. This relief valve should have a temperature
rating of 210° F (98.9°C), a pressure rating not exceeding the lowest
rated working pressure of any system component, and a discharge
capacity exceeding the total input of the water heaters supplying water to
the storage tank.

THE PURPOSE OF A RELIEF VALVE IS TO AVOID EXCESSIVE
PRESSURE OR TEMPERATURE INTO THE STEAM RANGE, WHICH
MAY CAUSE SCALDING AT FIXTURES, TANK EXPLOSION, SYSTEM
OR HEATER DAMAGE.

To avoid scalding or water damage, a drain line must be connected to a
relief valve to direct discharge to a safe location, A DRAIN LINE MUST

NOT BE REDUCED FROM THE SIZE OF THE VALVE OUTLET AND IT
MUST NOT CONTAIN ANY V AL VES BETWEEN THE HEA TER AND THE
RELIEF VALVE OR THE RELIEF VALVE AND THE DRAIN LINE EXIT.
IN ADDITION, THERE SHOULD NOT BE ANY RESTRICTIONS IN A
DRAIN LINE NOR SHOULD IT BE ROUTED THROUGH AREAS WHERE
FREEZING CONDITIONS MIGHT OCCUR. DO NOT THREAD OR CAP
THE DRAIN LINE EXIT. RESTRICTING OR BLOCKING A DRAIN LINE
WILL DEFEAT THE PURPOSE OF THE RELIEF VALVE AND MAY
CREATE AN UNSAFE CONDITION. Install a drain line with a downward

slope such that it naturally drains itself.
Y our local code authority may have other specific relief valve requirements.
NOTE: These heaters are equipped with an automatic burner shutoff

system actuated by high water temperature.

CLOSED WATER SYSTEM

A closed system will exist if a back-flow preventer (check valve), pressure
reducing valve, or other similar device is installed in the cold water line
between the water heater and the street main (or well). Excessive pressure
may develope due to the thermal expansion of heated water causing
premature tank failure or intermittent relief valve operation. This type of
failure is not covered by the limited warranty . An expansion tank may be
necessary in the cold water supply to alleviate this situation, see installation
diagrams on pages 14-18. Contact the local plumbing authority.

TANK CLEANOUT PORT - FIGURE 8

Models having ASME tank construction will have two cleanout ports. One
port will be located as indicated above and the other will be located directly
opposite.

Occasionally , some water seepage will occur at a cleanout port. T o correct
this situation, slightly tighten the cleanout cover bolts until the seepage is
eliminated. Do not over tighten the bolts or the cleanout gasket will be
damaged. Tighten each bolt gradually and alternate between opposed
bolts on the cleanout cover.

FUEL SYSTEMS

GENERAL

The Standard for the Installation of Oil Burning Equipment-NFP A No. 31,
local codes, and these instructions must be followed when installing the
tank, piping and burner . In addition, an oil pump installation sheet and oil
burner certificate are packed with the burner for use and completion by
the installer.

On fuel systems with high pressures, a Webster "OSV" oil safety valve
(Webster Electric CO., Racine, Wisc.) will be required to reduce the oil
pressure at the burner pump. See FUEL PUMP, page 9, for pressure
ratings of the burner's pump.

This manual and the completed oil burner certificate (CS75) are to be left
with the user for future reference.

Figure 9 shows a typical single stage one or two line fuel system. When
two or more tanks are connected to one burner, the supply line from each
tank should run to a header fitted with an approved three-way valve.
Normally only one tank may be drawn at a time unless local codes permit
simultaneous feeding of two tanks on gravity type installations.

7

A TYPICAL HEATER INSTALLATION - FIGURE 9

Refer to pages 2, 3, and 4 in this manual for more information about
burner series numbers and characteristics for adaptability to the following
systems.

SYSTEM TYPES

Single Stage, Supply Line Only: The bottom of the oil storage tank must
be above the level of the fuel unit, fig. 10. The fuel oil will flow by gravity
to the burner. A single pipe is run between the tank and fuel unit. Burner
Series No. 940 is from this type of service as shipped (the bypass plug is
not installed).

TABLE 6

Distance Max. Distance Max.

T an k Run length Tank Run Length

Bottom Ft. (M) Bottom Ft. (M)

Below Below

Pump 3/8" 1/2" Pump 3/8" 1/2"

Plug O.D. O.D. Plug O.D. O.D.

Ft. (M) Tubing Tubing Ft. (M) Tubing Tubing

1 (0.3) 66 (20.1) 100 (30.4) 6 (1.8) 36 (10.9) 100 (30.4)
2 (0.6) 55 (16.7) 100 (30.4) 7 (2.1) 31 (9.4) 100 (30.4)
3 (0.9) 50 (15.2) 100 (30.4) 8 (2.4) 26 (7.9) 100 (30.4)
4 (1.2) 45 (13.7) 100 (30.4) 9 (2.7) 21 (6.4) 83 (25.2)
5 (1.5) 40 (12.1) 100 (30.4) 10 (3.0) 16 (4.8) 64 (19.5)

Two Stage, Supply and Return Lines: This system, fig. 12, is required
when long lines and high lifts (requiring up to 20" of vacuum and 10'
vertical lift) are encountered. Burner Series No. 941 is used in this service.
Bypass plug must be installed.

A GRAVITY FEED, SUPPLY LINE ONLY, INSTALLA TION

FIGURE 10

If the bottom of the oil tank is at least 2 inches higher than the plug
opening at which the supply line connects to the fuel pump, a single-line
gravity-feed system with 3/8" O.D. tubing may be used with a maximum
run length of 100 feet.

• A two stage pump may be used on one line, gravity feed
installations. The pump will function as a single stage unit when
the by-pass plug is not installed.

• Single Stage, Supply and Return Lines. This type of system,
fig. 11, is self-priming. Burner Series No. 940 with by-pass plug
field installed, is for this type of service.

If the tank bottom is no lower than 10 feet below the plug, a single stage
pump may be used but, it must be a two line system with maximum
tubing runs (which includes lift) as shown in Table 6.

A SINGLE STAGE (LOW LIFT), SUPPLY AND RETURN

LINE INSTALLATION - FIGURE 1 1

A TWO STAGE (HIGH LIFT), SUPPLY AND RETURN

LINE INSTALLATION - FIGURE 12

If the tank(s) bottom is lower than the plug by more than 10 feet, a two
stage pump with a two line system must be used with maximum tubing
runs (which includes lift) as shown in Table 7.

TABLE 7

Distance Max. Distance Max.

T an k Run length Tank Run Length

Bottom Ft. (M) Bottom Ft. (M)

Below Below

Pump 3/8" 1/2" Pump 3/8" 1/2"

Plug O.D. O.D. Plug O.D. O.D.

Ft. (M) Tubing Tubing Ft. (M) Tubing Tubing

1 (0.3) 74 (22.5) 100 (30.4) 9 (2.7) 51 (15.5) 100 (30.4)
2 (0.6) 71 (21.6) 100 (30.4) 10 (3.0) 48 (14.6) 100 (30.4)
3 (0.9) 69 (21.0) 100 (30.4) 11 (3.3) 45 (13.7) 100 (30.4)
4 (1.2) 66 (20.1) 100 (30.4) 12 (3.6) 42 (12.8) 100 (30.4)
5 (1.5) 63 (19.2) 100 (30.4) 13 (3.9) 39 (1 1.8) 100 (30.4)
6 (1.8) 60 (18.2) 100 (30.4) 14 (4.2) 37 (1 1.2) 100 (30.4)
7 (2.1) 57 (17.3) 100 (30.4) 15 (4.5) 34 (10.3) 100 (30.4)
8 (2.4) 54 (16.4) 100 (30.4)

MULTIPLE HEATER FUEL LINES

Where two or more heaters form a water heating system, each burner
shall have an entirely separate oil supply line from the tank to the burner.

BURNER INST ALLA TION

GENERAL

An oil Burner Certificate is packed with the oil burner . Following the burner
manual installation the necessary tests shall be performed and the results
recorded on the certificate, see BURNER CERTIFICATE. The certificate
and this instruction manual must be left with the user for future reference.
Check to be certain the heater and burner model numbers are alike and
the oil pump characteristics are proper for the job. See IDENTIFICA TION,
page 3.

8

BURNER

The burner assembly is mounted on the flange of the combustion chamber,
fig. 13.

NOTE: Be certain combustion chamber opening is aligned with opening

in heater flange, fig. 13, before placing burner into heater .

1. Place the flange gasket and combustion chamber seal over the burner
tube.

2. Place the burner flange on the studs and into the heater flange opening.

ASSEMBLY OF THE OIL BURNER TO THE HEATER

FIGURE 13

3. Place the flat washers and lock washers over the studs and fasten the
burner in place with the 3/8" - 16 nuts as shown.

Connect the oil line(s) and electrical wires to the burner as follows:

1. The oil pump manufacturer's instructions should be checked for
connection and bleeding information.

• The burner is approved for use with fuel oil not heavier than No. 2.

2. An approved, separately fused circuit with disconnect switch should
be available for the oil burner. Using Figure 14, the wiring diagram
below as a guide:

• Route the 120 volt incoming line in the dual bulb thermostat,

mounted on the side of the heater.

• Bring the factory wiring from the high limit /eco and thermostat into
the oil burner junction box.

• Install field and factory wiring as shown in the wiring diagrams,
figs. 14. A schematic diagram is also shown for convenience when
servicing.

• Ground the heater in accordance with the NEC code to guard
against electrical shock from the heater or water system.

3. All burners have "intermittent ignition" as defined by UL (ignition is on
during the time the burner is on and off when the burner is off).

4. Do not "test fire" the heater to complete the oil burner certificate until
the tank is filled with water, see the oil burner manual.

The certificate and this manual must be left with the user for future
reference.

TABLE 8 - OIL PUMP & NOZZLE SPECIFICATIONS

Fitting Rate

(GPH) Oil Burner Oil Burner

Non Pump Oil Burner Nozzle

Heater State State Non-Setting Nozzle Rating

Model Burner Burner PSIG Spec. (GPH)

GPO 86 -199 1.42 1.1 110 1.35 x 80°B 1.35
GPO 86-245 1.75 1.5 100 1.75 x 80°B 1.75
GPO 84-315/315A 2.25 2.0 100 2.25 x 80°B 2.25
GPO 75-385/385A 2.75 2.5 100 2.75 x 80°B 2.75
GPO 75-455/455A 3.25 3.0 100 3.25 x 80°B 3.25
GPO 69-700/700A 5.00 4.5 100 5.00 x 80°B 5.00

FUEL PUMP

GENERAL

All heaters are shipped with the pump pressure set at 100 psig except
the GPO 86-199 which is set at 110 psig.

All oil pumps are fitted for installation on single fuel line systems. The
pump may be adapted for two line service by using the by-pass Plug and
pump manufacturer's instructions packed with the burner.

The single-stage pumps are for single-pipe or two-pipe installations, either
lift or gravity feed. On gravity feed installations the inlet pressure is not to
exceed 3 psig. On one pipe lift installations the lift is not to exceed 8 ft.

The two-stage pumps are for two-pipe lift installations where the inlet
vacuum does not exceed 20" hg. vacuum.

AIR BLEED PROCEDURE (Refer to oil burner manual).

FIGURE 14

9

OPERATION

GENERAL

Never operate the heater unless the tank is filled with water and a
temperature and pressure relief valve is installed.

FILLING

1. Oil burner electrical disconnect switch should be in the "OFF position

2. Close the heater drain valve.

3. Open a nearby hot water faucet to allow the air in the system to escape.

4. Fully open the cold water inlet valve, filling the heater and piping.

5. Close the hot water faucet as water starts to flow from the opening,
Leave the cold water inlet valve fully open. The heater is now ready to
start-up if being placed in operation for the first time.

ST ART-UP

The following checks should be made by the installer when the heater is
placed into operation for the first time:

1. Check all factory and field made water, oil and electrical connections
for tightness. Also check flue gas disposal provisions on top the heater.

• Repair any water and oil leaks. Tighten electrical and flue

connections as necessary.

2. Where the water heater or water heating systems includes a circulating
pump, it may need to be lubricated before operated. The tube of
lubricant supplied with the pump includes directions for use.

• Field installed circulating pumps should be all bronze construction.

Be sure the oil burner, related piping, valves and controls are in place,
adjusted and ready for operation before turning on the electricity.

3. Adjust the heater mounted control as follows:

• THERMOSTAT (adjustable) set for desired water temperature.

• It is suggested the thermostat be turned to the lowest setting which

satisfies the hot water requirements of the system. This helps
minimize scale formation in the heater.

• HIGH LIMIT (not adjustable, manual reset) factory set to cutout at

195° F (90.5°C).

• If the high limit is actuated, the safety primary control will cause

the oil burner to shut down. See SAFETY PRIMARY CONTROL,
page 21.

• To reset the safety primary control, depress the red button on the

control.

• Depress red button one time only. If burner does not operate after

depressing red button one time, call service man.

4. Turn on the oil burner electrical disconnect switch.

5. The heater will begin normal operation on the thermostat's "call for
heat".

6. To turn the heater off, open the electrical disconnect switch. If the
heater is to remain inoperative for a long period of time, close the
shutoff valve on the oil supply line.

DANGER

THIS WATER HEATER IS EQUIPPED WITH AN ADJUSTABLE
THERMOSTAT TO CONTROL WATER TEMPERATURE. HOT WATER
TEMPERATURES REQUIRED FOR AUTOMATIC DISHWASHER AND
LAUNDRY USE CAN CAUSE SCALD BURNS RESULTING IN SERIOUS
PERSONAL INJURY AND OR DEA TH. THE TEMPERA TURE A T WHICH
INJURY OCCURS VARIES WITH THE PERSONS AGE AND TIME OF
EXPOSURE. THE SLOWER RESPONSE TIME OF CHILDREN, AGED
OR DISABLED PERSONS INCREASES THE HAZARDS TO THEM.
NEVER ALLOW SMALL CHILDREN TO USE A HOT WATER TAP, OR
TO DRAW THEIR OWN BATH WATER. NEVER LEAVE A CHILD OR
DISABLED PERSON UNATTENDED IN A BATHTUB OR SHOWER.

THE WATER HEATER SHOULD BE LOCATED IN AN AREA WHERE
THE GENERAL PUBLIC DOES NOT HAVE ACCESS TO SET
TEMPERATURES.

SETTING THE WATER HEATER TEMPERATURE AT 120°F (48.9°C)
WILL REDUCE THE RISK OF SCALDS. Some states require settings at

specific lower temperatures.
Figure 16 shows the approximate time-to-burn relationship for normal

adult skin. Short repeated heating cycles caused by small hot water
uses can cause temperatures at the point of use to exceed the thermostat
setting by up to 20°F. If you experience this type of use, you should
consider using lower temperature settings to reduce scald hazards.

Temperature Time to Produce 2nd & 3rd

Setting Degree Burns on Adult Skin

180°F (82.2°C) Nearly instantaneous
170°F (76.6°C) Nearly instantaneous
160°F (71.1°C) About 1/2 second
150°F (65.5°C) About 1-1/2 seconds
140°F (60.0°C) Less than 5 seconds
130°F (54.4°C) About 30 seconds
120°F (48.9°C) More than 5 minutes

FIGURE 16

V alues for reducing point-of-use temperature by mixing cold and hot water
are available. Also available are inexpensive devices that attach to faucets
to limit hot water temperatures. Contact a licensed plumber or the local
plumbing authority.

The water temperature is controlled by a thermostat, fig. 17, which has
two sensing elements. One sensor is located near the top of the tank and
the other is near the center. The thermostat is set in the lowest position
before the heater leaves the factory.

The thermostat temperature dial, fig. 17, is accessible by taking off the
access cover and removing the control cover. The dial is adjustable and
may be set for 120°F (48.9°C) to 170°F (76.6°C) water temperature, but
120°F is the recommended starting point. It is suggested the dial be
placed in the lowest setting which produces an acceptable hot water supply.
This will always give the most energy efficient operation. The temperature
control has a 4F° (2.2C°)fixed differential.

HIGH LIMIT SWITCH (E.C.O)

WATER TEMPERATURE CONTROL

The dual bulb controller (fig.17) contains the high limit (energy cutoff)
sensor. The high limit switch interrupts main burner gas flow should the
water temperature reach 195°F (90.5°C).

In the event of high limit switch operation, the appliance cannot be restarted
unless the water temperature is reduced by 20F° (11.1C°) (approx.) and
the high limit reset button on front of limit control (fig.17) is depressed.

Continued manual resetting of high limit control, preceded by higher than
usual water temperature is evidence of high limit switch operation. Contact
your dealer or servicer if continued high limit switch operation occurs.

10

DUAL-BULB THERMOST AT (COVER REMOVED)

FIGURE 17

BURNER CERTIFICATE (COMBUSTION TEST)

The Commercial Standard CS75 Oil Burner Certificate form must be filled
in and posted in the vicinity of the water heater.

Instructions for filling in certificate are on the back of the certificate. This
must be done by the installer at the time the heater is first operated. The
certificate is in the oil burner manual.

DRAINING

The water heater must be drained if it is to be shut down and exposed to
freezing temperatures. Maintenance and service procedures may also
require draining the heater.

1. Turn off the oil burner electrical disconnect switch.

• If required for draining the heater, turn off the oil line supply valve.

2. Close the cold water inlet valve to heater.

3. Open a nearby hot water faucet to vent the system.

4. Open the heater drain valve.

5. If the heater is being drained for an extended shutdown, it is suggested
the drain valve be left open during this period.

• Following FILLING instructions when restarting hot water service.

MAINTENANCE

GENERAL

TABLE 9 SUGGESTED MAINTENANCE SCHEDULE

Semi-

Relief Valve Lift Lever Annually

Flushing Monthly

Sediment Semi-

Removal Annually

Anode Semi

Tank Inspection Annually

Lime Scale As UN•LIME

Removal Required Delimer

Circulating Four SAE No. 20 non-detergent

Pump Oiling Months motor oil

Inspection Combustion test

and Semi- kit & test specifications

Oil Burner Adjustment Annually (Page 26)

Nozzle Semi-

Replacement Annually New Nozzle

Flue Baffle

Pipe Cleaning Annually Wire Brush
Venting Semi­System Inspected Annually

®

RELIEF V AL VES

At least twice a year, the system relief valves should be checked to ensure
that they are in operating condition. T o check a relief valve, lift the lever at
the end of the valve several times. The valve should seat properly and
operate freely. Water should flow while the lever is lifted.

If water does not flow, remove the valve and inspect for obstructions or
corrosion. Replace with a new valve of the recommended size as
necessary. Inspection of the valve should be performed at least every
three years. Do not attempt to repair the valve, as this could result in
improper operating and a tank explosion. In areas with poor water
conditions, it may be necessary to inspect the T&P valve more often than
twice a year.

DANGER

BEFORE MANUALLY OPERATING A RELIEF VALVE, MAKE SURE
THAT DRAIN LINE HAS BEEN ATT ACHED T O THE VALVE TO DIRECT
THE DISCHARGE TO AN OPEN DRAIN. FAILURE TO TAKE THIS
PRECAUTION COULD MEAN CONTACT WITH EXTREMELY HOT
WATER PASSING OUT OF THE VALVE DURING THIS CHECK
OPERATION.

If the temperature and pressure relief valve on the heater discharges
periodically or continuously, it may be due to thermal expansion of water
in a closed water supply system, or it may be due to a faulty relief valve.

Water heater maintenance includes periodic tank flushing and cleaning,
and removal of lime scale. The oil burner should be inspected and adjusted
to maintain proper combustion. Where used, the water heating system
circulating pump should be oiled (See table 9).

The depth of lime buildup should be measured periodically. Heaters will
have about 2" (51 mm) of lime buildup when the level of lime has reached
the bottom of the cleanout opening or about 1" (25.4 mm) of lime buildup
if it has reached the drain valve opening. A schedule for deliming should
be setup, based on the amount of time it would take for a 1" (25.4 mm)
buildup of lime.

Example 1: Initial inspection shows 1/2" (12.7 mm) of lime accumulation

during the first 6 months of operation. Therefore, the heater
can be delimed once a year.

Example 2: Initial inspection shows 2" (51mm) of lime

accumulationduring the first 6 months of operation.
Therefore, the heater should be delimed every 3 months.

Following are the instructions for performing some of the recommended
maintenance. Oil burner inspection and adjustment should be performed
by a competent technician.

Thermal expansion is the normal response of water when it is heated. In
a closed system, thermal expansion will cause the system pressure to
build until the relief valve actuation pressure is equaled. Then, the relief
valve will open, allowing water to escape, slightly lowering the pressure.

Your water supplier or local plumbing inspector will know how to best
correct this situation. Two common corrections are listed in the Checklist
and Service Information which appears later in this manual.

ABOVE ALL, DO NOT PLUG THE TEMPERATURE AND PRESSURE
RELIEF VALVE. THIS IS NOT A SOLUTION AND CAN CREATE A
HAZARDOUS SITUATION.

FLUSHING

1. Turn off the oil burner electrical disconnect switch.

2. Open the drain valve and allow water to flow until it runs clean.

3. Close the drain valve when finished flushing.

4. Turn on the oil burner electrical disconnect switch.

11

SEDIMENT REMOV AL

Water borne impurities consist of fine particles of soil and sand which
settle out and form a layer of sediment on the bottom of the tank.

For convenience, sediment removal and lime scale removal should be
performed at the same time.

LIME SCALE REMOV AL

The amount of calcium carbonate (Lime) released from water is in direct
proportion to water temperature and usage, see chart. The higher the
water temperature or water usage , the more lime deposits are dropped
out of the water. This is the lime scale which forms in pipes, heaters and
on cooking utensils.

5. Inspect cleanout plate gasket. If new gasket is required, replace with
State Part no. 99038.

6. Install cleanout plate. Be sure to draw plate up tight by tightening
screws securely.

7. Fill the water heater according to the FILLING section on Page 10..

8. Check for water leakage.

9. Replace outer jacket cover plate.

Flo-jug Method of Deliming

The Flo-Jug is the standard 5 gallon container for UN•LIME® -or- it is
available as a deliming kit with UN•LIME®, hose and fittings. Contact your
dealer, distributor or the State Water Heaters. Figure 18 illustrates most
of the following steps.

1. The heater should be prepared for deliming as described in the "Why?
When and How" booklet. The relief valve may also be delimed at this
time.

2. With the Flow-Jug upright:

• Take off cap, remove cover under opening and install 3/4" x 4"

brass pipe nipple.

WATER USAGE IN GALLONS PER DAY POUNDS OF LIME

DEPOSITED VS. TEMPERATURE AND WA TER USAGE

Lime accumulation not only reduces the life of the equipment but also
reduces efficiency of the heater and increases fuel consumption.

The usage of water softening equipment greatly reduces the hardness of
the water. However, this equipment does not always remove all of the
hardness (lime). For this reason it is recommended that a regular schedule
for deliming be maintained.

Sediment and lime scale removal may be accomplished through the
cleanout opening furnished on the water heater, see FEATURES,
page 2. The heater must be drained, see DRAINING, page 11, before
removing cleanout cover on tank.

To dissolve and remove the more stubborn mineral deposits, UN•LIME
Professional Delimer or equivalent should be used.

UN•LIME

®

Delimer is an easy-to-handle patented food grade acid
formulated specifically for lime scale removal from all types of water using
equipment and is available in 1 gallon (Part No. 4763) and 5 gallon (Part
No. 4813) sizes. Hydrochloric base acids are not recommended for use
on glass-lined tanks.

To clean heater through cleanout opening, proceed as follows:

1. Turn off water inlet valve. Turn off the oil burner electrical disconnect

switch. Open the nearest hot water faucet, then open the drain valve
and allow all water to drain from the heater..

2. Remove outer cover plate from lower side of heater jacket.

3. Remove six(6) hex head screws securing tank cleanout plate and

remove plate.

4. Remove lime, scale. or sediment using care not to damage the glass

lining.

• Drill or punch a 3/16" vent hole in handle. A stainless steel screw is
included with the Flo-Jug kit. This screw is to be installed in the
vent hole when Flo-Jug is not in use.

• Remove drain valve from heater and insert a 3/4" x 4" drain nipple.

• Connect the clamp 1" I. D. x 3" hole to Flo-Jug and drain nipple.

3. Lift the Flo-Jug to the POUR POSITION and permit the UN•LIME
flow into the heater as rapidly as possible.

• Be sure to keep the vent just above the liquid level.

4. Place the Flow-Jug in the DELIME POSITION.

• It may be necessary to place the empty jug on its carton to trap the

solution in the heater.

• Allow the UN•LIME

®

to attack the water scale for 5 minutes.

5. Lower the Flo-Jug to the DRAIN POSITION and allow the UN•LIME
to flow out of the heater as rapidly as possible.

• Observe the vent hole and elevate the jug slightly if there is a

®

possibility of spillage.

• Deliming activity is indicated by foaming on the surface of the

solution.

6. Continue the deliming process:

• Raise jug to POUR POSITION. Allow solution to flood into heater.

• Place jug to DELIME POSITION for 5 minutes. Solution is at work

in heater.

• Lower jug to DRAIN POSITION and allow solution to flow out.

Observe foaming.

7. After one hour, or earlier if the deliming activity (foaming) stops, inspect
the tank interior.

• Drain the UN•LIME® back into jug, DRAIN POSITION, and then

stand jug in DELIME POSITION.

• Remove clamp, hose and pipe nipple from heater drain opening.

12

®

to

®

• Observe interior through opening - a small flashlight may be used
effectively.

• If the interior still shows water scale, the deliming process should
be continued.

• To check UN•LIME® for continued use or reuse, place some lime
scale or white chalk into a glass with a small amount of the solution.
If the material is vigorously dissolved by the solution, the UN•LIME®
can be reused. If not, then UN•LIME® has been weakened and
should be replaced.

SOOT REMOV AL

Soot must be removed semi-annually from the heater and flow passages
to insure efficient operation of the heater.

DELIMING THE GPO WATER HEATER

FIGURE 18

8. When deliming has been completed, the heater should be flushed for
3 to 5 minutes with fresh water.

• Remove the deliming equipment, install the drain valve, open the

cold water inlet line and allow water to flow through heater and out
the drain valve. Don't forget to plug vent and cap opening in Flo­Jug.

9. When flushing is completed:

• Fill heater being certain to expel air from tank through a nearby hot

water faucet.

• Replace relief valve, removed for deliming.

• Restore oil, water and electrical supply to heater.

• Check for water leakage.

A TYPICAL HEA TER FLUEW AY AND FLUE BAFFLE

FIGURE 19

1. Remove chimney connector and top cover of heater from heater. Clean
out all soot deposits from connector and chimney opening. A wire
brush is recommended for this operation.

2. Remove flue baffles by lifting from tank.

3. Using a wire brush, remove soot from flue passages in heater tank.

CAUTION: While cleaning tank flue passages, care must be taken that

brush does not come in contact with the top of the combustion
chamber as damage could occur to the combustion chamber
lining.

4. Remove oil burner assembly and using a vacuum cleaner, remove all
loose soot from combustion chamber area. Avoid contact with
combustion chamber as it can be damaged quite easily.

• If flange gasket is damaged, replace with State Part No. 24165

5. Upon completion of cleaning, reassemble the heater. (It may be
necessary to apply new sealer tape to the top cover to ensure proper
venting. New sealer tape can be ordered from State Water Heaters).

6. Return the heater to operation by following the start-up instructions
on page 10.

VENT SYSTEM

10. Flo-Jug Cleanup.

• Allow scale to separate from UN•LIME® and settle on bottom
of Flo-Jug.

• Pour off UN•LIME® into plastic container and check for reuse.

• Rinse sediment from Flo-Jug.

• If UN•LIME® is reusable , pour back into Flo-Jug. Be sure to plug
vent and cap opening.

CIRCULA TING PUMP

The water heater or water heating system may include a circulating pump.
Where used, it may need to be lubricated once every four months with
SAE No. 20 non-detergent motor oil or as directed by the manufacturer.

• Place 2 or 3 teaspoons in the bearing oil cup and 10 to 12 drops in the
motor oil cups.

Examine the vent system every six months for obstructions and/or
deterioration of vent piping. Remove any soot or obstructions and replace
damaged vent piping.

ANODE ROD INSPECTION

The anode rod is used to protect the tank from corrosion. Most hot water
tanks are equipped with an anode rod. The submerged rod sacrifices
itself to protect the tank. Instead of corroding the tank, water ions attack
and eat away the anode rod. This does not effect the water's taste or
color. The rod must be maintained to keep the tank in operating condition.

Anode rod deterioration depends on water conductivity, not necessarily
water condition. A corroded or pitted anode rod indicates high water
conductivity and should be checked and/or replaced more often than an
anode rod that appears to be intact. Replacement of a depleted anode
rod can extend the life of your water heater. Inspection should be conducted
by a qualified technician, and at a minimum should be checked annually
after the warranty period.

13

INST ALLATION DIAGRAMS

ONE TEMPERA TURE - ONE HEATER VERTICAL STORAGE TANK FORCED

CIRCULA TION WITH OR WITHOUT BUILDING RECIRCULATION

NOTE:
WHEN USING A ST ATE T-140,200,350,OR 400 STORAGE TANK,
USE LOWER 3/4" (19 mm) OPENING FOR TANK TEMP.CONTROL

SCALD PREVENTION

HOT WATER CAN SCALD IF USED
CARELESSLY OR IN UNANTICIPATED
MANNER.

CAUTION

IF BUILDING COLD WATER SUPPLY HAS
A BACK FLOW PREVENTER, CHECK
VALVE OR WATER METER WITH CHECK
VALVE, PROVISIONS FOR THERMAL
EXPANSION OF WATER IN THE HOT
WATER SYSTEM MUST BE PROVIDED.

NOTE: CONNECT RETURN LINE FROM
HOT WATER CIRCULATING LOOP
(IF USED) TO COLD WATER INLET LINE.

INSET B

VACUUM RELIEF VALVE

INSTALL PER LOCAL CODES.

ONE TEMPERA TURE - ONE HEATER HORIZONTAL STORAGE TANK FORCED

CIRCULA TION WITH OR WITHOUT BUILDING RECIRCULATION

DANGER:

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE
TEMPERATURES AT FIXTURES. SEE WATER TEMPERATURE
CONTROL WARNING ON PAGE 10. IF HIGHER PREHEAT
TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE
BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT
WATER SUPPLIED TO FIXTURES.

INSET A

INSTALL THERMAL EXPANSION
TANK IN COLD W ATER SUPPLY LINE,
IF CHECK VALVE OR PRESSURE
REDUCING VALVE IS USED IN
SUPPLY.

* PIPE TO OPEN DRAIN

INSTALL IN ACCORDANCE WITH LOCAL CODES

14

WIRING DIAGRAM FOR HEATER TO TANK LOOP

AND /OR HOT WATER LOOP (IF USED)

SINGLE TEMPERA TURE OR BOOSTER

DANGER:

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE
TEMPERATURES AT FIXTURES. SEE WATER TEMPERATURE
CONTROL WARNING ON PAGE 10. IF HIGHER PREHEAT
TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE
BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT
WATER SUPPLIED TO FIXTURES.

TWO TEMPERA TURE - ONE HEATER HIGH TEMPERATURE STORAGE

WITH OR WITH OUT RECIRCULATION

NOTE: IF TEMPERED WA TER IS RECIRCULATED

RETURN LINE SHOULD BE CONNECTED
AT POINT "A"

* PIPE TO OPEN DRAIN

RETURN LINE FROM 180°F (82.2°C)

CIRCULATING LOOP (IF USED)

INSET B

VACUUM RELIEF VALVE

INSTALL PER LOCAL CODES.

INSET A

INSTALL THERMAL EXP ANSION TA NK
IN COLD WATER SUPPLY LINE, IF
CHECK VALVE OR PRESSURE
REDUCING VALVE IS USED IN
SUPPLY.

INSTALL IN ACCORDANCE WITH LOCAL CODES

WIRING DIAGRAM FOR TEMPERED WATER LOOP

(IF USED)

WIRING DIAGRAM FOR 180°F (82.2°C) LOOP (IF USED)

15

TWO TEMPERA TURE - TWO HEATERS HIGH TEMPERATURE STORAGE

WITH OR WITHOUT RECIRCULA TION

DANGER:

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE
TEMPERATURES AT FIXTURES. SEE WATER TEMPERATURE
CONTROL WARNING ON PAGE 10. IF HIGHER PREHEAT
TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE
BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT
WATER SUPPLIED TO FIXTURES.

* PIPE RELIEF VALVE TO OPEN DRAIN

NOTE: IF TEMPERED WATER IS RECIRCULA TED, RETURN LINE

SHOULD BE CONNECTED AT POINT "A"

FOR MULTIPLE HEATER INSTALLATION SEE MANIFOLD KIT
SPECIFICATIONS, PAGES 19.

INSTALL IN ACCORDANCE WITH LOCAL CODES

WIRING DIAGRAM FOR TEMPERED WATER LOOP

(IF USED)

INSET B

VACUUM RELIEF VALVE

INSTALL PER LOCAL CODES.

WIRING DIAGRAM FOR 180°F (82.2°C) LOOP (IF USED)

INSET A

INSTALL THERMAL EXP ANSION TA NK
IN COLD WATER SUPPLY LINE, IF
CHECK VALVE OR PRESSURE
REDUCING VALVE IS USED IN
SUPPLY.

16

TWO TEMPERA TURE - THREE HEATERS (TWO PRE-HEATERS/ONE BOOSTER)

WITH OR WITHOUT CIRCULA TION

INSET A

INSTALL THERMAL EXPANSION
TANK IN COLD WATER SUPPLY
LINE, IF CHECK VALVE OR
PRESSURE REDUCING VA L VE IS
USED IN SUPPLY.

DANGER:

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERATURES AT FIXTURES. SEE
WATER TEMPERATURE CONTROL WARNING ON P AGE 10. IF HIGHER PREHEA T TEMPERA TURES
ARE NECESSARY TO OBTAIN ADEQUATE BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR
HOT WATER SUPPLIED TO FIXTURES.

TWO TEMPERATURE - TWO HEATERS (ONE PRE-HEATER/ONE BOOSTER HEATER)

WITH OR WITHOUT RECIRCULA TION

INSET B

VACUUM RELIEF VALVE

INSTALL PER LOCAL CODES.

WIRING DIAGRAM FOR FIXTURE OR BOOSTER

LOOP (IF USED) - OTHER THAN DISHWASHER

WIRING DIAGRAM FOR 180° LOOP (IF USED)

INST ALL IN ACCORDANCE WITH LOCAL CODES

* PIPE RELIEF VALVE TO OPEN DRAIN
** 140°F (60°C) TO 150°F (65.5°C) SHOULD BE MAXIMUM WATER

TEMPERATURE MAINTAINED IN THE PRE-HEATERS.
120°F (48.8°C) SHOULD BE THE MINIMUM TEMPERATURE OF WATER

STORED IN THE PRE-HEATERS.

CONNECT CIRCULATING LINE FROM FIXTURES, IF USED, TO COLD WATER
SUPPLY LINE OF PRE-HEATER.

CONNECT CIRCULATING LINE OF 180°F OR BOOSTED WATER, IF USED, TO
INLET WATER LINE TO BOOSTER.

17

TWO TEMPERA TURE-ONE HEATER HIGH TEMPERATURE STORAGE

WITH RECIRCULA TION OF SANITIZING LOOP

NOTE 1: TOGGLE SWITCH CONTROLS 180°F WATER CIRCULA TION.

INSTALL ON OR CLOSE TO DISHWASHING MACHINE .
TOGGLE SWITCH MUST BE CLOSED (ON) DURING THE
RINSE OPERA TION AND OPEN (OFF) WHEN DISHWASHER
IS NOT OPERATING.

NOTE 2: INSTALL LINE TEMPERATURE CONTROL IN AN

UNINSULATED TEE BEYOND THE DISHWASHING
MACHINE TAKEOFF IN THE SANITIZING LOOP. CONTROL
SHOULD BE SET AT 185°F (85°C).

NOTE 3: ADJUST PLUG COCK SO THE SANITIZING LOOP FLOW

RATE DOES NOT CAUSE UNNECESSARY TURBULENCE
IN THE TANK.

NOTE 4: IF TEMPERED WATER IS RECIRCULATED, RETURN LINE

SHOULD BE CONNECTED AT POINT "A".

INSET B

VACUUM RELIEF VALVE

INSTALL PER LOCAL CODES.

NOTES

INSET A

INSTALL THERMAL EXPANSION
TANK IN COLD WATER SUPPLY
LINE, IF CHECK VALVE OR
PRESSURE REDUCING VA L VE IS
USED IN SUPPLY.

WIRING DIAGRAM FOR 180° LOOP (IF USED)

18

MANIFOLD KIT COMMERCIAL OIL FIRED WATER HEATERS

Precision cut type "L" all copper State manifold kits assure water flow
balance of all units. Without this balance, the full water heating and
storage potential of the system cannot be achieved. Plus, the units with
the higher water flow may have a shortened life. Unions and T & P
valves shown in piping diagrams are not included in the manifold kits.

Dimensions shown are for minimum space occupied by complete
assemblies. Service space in front of units must be added.

DANGER:

TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERATURES AT
FIXTURES. SEE WA TER TEMPERA TURE CONTROL W ARNING ON P AGE 10. IF
HIGHER PREHEAT TEMPERA TURES ARE NECESSARY TO OBT AIN ADEQUA TE
BOOSTER OUTPUT, ADD AN ANTI-SCALD V A LVE FOR HOT W A TER SUPPLIED
TO FIXTURES.

THREE UNIT MANIFOLD KIT (PART NO. 78693)

TWO UNIT MANIFOLD KIT (PART NO. 78692)

CHECK LIST AND SERVICE

INFORMATION

IMPORT ANT

The installer may be able to observe and correct certain problems which
might arise when the unit is put into operation or when it is refired after a
prolonged shut-down. HOWEVER, it is recommended that only qualified
servicemen, using appropriate test equipment, be allowed to service the
heater.

DANGER

BE SURE TO TURN OFF THE ELECTRICITY WHENEVER POSSIBLE
OR APPROPRIATE WHEN CHECKING EQUIPMENT.

FOUR UNIT MANIFOLD KIT (PART NO. 78694)

2. Check the fuses.

• The oil burner electrical disconnect switch usually contains fuses.

3. The capacity of the heater may have been exceeded by a large demand
for hot water.

• Large demands require a recovery period to restore water

temperature.

4. Colder incoming water temperature will lengthen the time required to
heat water to the desired temperature.

• If the heater was installed when incoming water temperature was

warm, colder water creates the effect of less hot water.

ELECTRICAL WIRING REPLACEMENT

If any of the original wiring, as supplied with the appliance, must be
replaced, it must be replaced with 16 AWG, or greater , copper conductor
with 600V, 105°C rated, thermoplastic insulation.

NOT ENOUGH OR NO HOT WATER

1. Be certain the oil burner electrical disconnect switch serving the water
heater is in the ON position.

5. Look for hot water wastage and leaking or open hot water faucets.

6. Sediment or lime scale may be affecting water heater operation. Refer
to MAINTENANCE for details.

7. Heater or burner may be dirty.

• Clean all heater flue pipes and flue connector.

• Have burner properly cleaned and readjusted.

19

8. Burner may not be firing at proper rate.

• Check nozzle size.

• Check fuel pump pressure setting.

• GPO-199 . . . . . . . . . . . 110 psig (758 kPa)

• All others . . . . . . . . . . . 100 psig (689.5 lPa)

9. Burner may be short cycling. Short cycling (too frequent off and on)
of burner will cause sooting. If unit or burner become dirty at frequent
intervals, after correcting the dirt condition also correct the control
settings (or other cause of the short cycling).

10.Oil burner fan wheel may be dirty.

• Clean fan wheel with a stiff brush.

11. Draft regulator may be stuck.

• Check to see if valve swings freely. Clean, if vane is stuck.

12. Priming control safety reset is open.

• Reset safety switch on burner mounted primary control, see

SAFETY PRIMARY CONTROL, page 21.

13. Burner motor safety reset is open.

BURNER ST ARTS-WON'T OPERATE

1. No oil in tank.

2. Oil line valve closed.

3. Loose connection in primary control.

• Check and tighten all wire connections, see SAFETY PRIMARY

CONTROL -page 21.

4. Electrode out of adjustment.

• Clean firing head and readjust electrodes.

5. Clogged burner nozzle.

• Replace with new nozzle, see nozzle chart, page 9, table 8.

• Nozzle should be replaced semiannually.

• Excessive water pressure.

• Excessive water temperature.

• Faulty relief valve.

Excessive water pressure is the most common cause of relief valve
leakage. It is often caused by a "closed system". If a check valve is in
the inlet system it will not permit the expanded hot water volume to equalize
pressure with the main. The relief valve must release this water or the
water heater or plumbing system will be damaged.

When such a condition is encountered, local codes or inspection agency
should be consulted to determine which system is acceptable in your
area. These may consist of:

• Installation of a second relief valve with lower settings than the
primary relief valve.

• An expansion tank of suitable size and pressure rating and provision
to avoid water logging.

BURNER WON'T START

When the thermostat calls for heat but the burner won't start, check to
make sure that you have proper voltage to the primary control.

CAUTION

When checking the low voltage circuit at the control, DO NOT TOUCH
THERMOSTAT WIRES TO FLAME DETECTOR TERMINALS AS THIS
WILL BURN OUT THE SENSOR IN THE SAFETY PRIMARY CONTROL.
If the voltage checks normal:

1. Flame detector may be sooted or seeing false light and will not let the
motor relay pull in.

2. Loose wiring.

3. Bad flame detector (mounted inside housing beneath transformer).

4. Reset red safety button (primary control).

5. Defective primary control.

6. Reset motor protector.

BURNER ST ARTS BUT FAILS TO RUN

6. Dirty filter.

• Replace element in oil filter.

WATER IS TOO HOT

1. Refer to WATER TEMPERATURE, page 10.

WATER HEATER MAKES SOUNDS

1. Sediment or lime scale accumulations cause noises when the tank
bottom should be cleaned. Refer to MAINTENANCE, page 11-13 for
details.

2. Some of the electrical components of the water heater makes sounds
which are normal.

• Contacts click or snap as the heater starts and stops.

• Transformers often hum.

WATER LEAKAGE IS SUSPECTED

1. Check to see if the water heater drain valve is tightly closed.

2. The apparent leakage may be condensation which forms on cool
surfaces of the heater and piping.

3. If the outlet of the relief valve is leaking it may represent:

When the burner starts (motor running) but flame is not established, the
control will lock out on safety in about 15 seconds. If the control does not
lock out on safety, then the control is defective and should be replaced.
When the motor is running but flame is not established, then the problem
becomes:

1. There is insufficient or no oil getting into the combustion chamber.

2. There is no spark to ignite the oil.
If the problem is insufficient or no oil getting into the combustion chamber ,

check for the following:

1. Dirt or water in the supply line.

2. Slipping coupling between motor and pump.

3. Defective pump.

4. Clogged, defective or too small a nozzle.

5. Oil tank empty.

6. Clogged filter in oil line.

7. Restriction or kink in fuel line.

8. Ice in fuel line.

9. Air leak in inlet connections.

20

If the problem is not getting a spark to ignite the oil, check for the following:

1. Loose wiring.

2. Red ignition transformer.

3. Low voltage.

4. Crack in electrode porcelain insulators.

5. Electrodes carboned or out of adjustment.

6. Weak or no contact between bus bars and terminals of transformer.

NORMAL ST A RT, BUT LOCKS OUT ON SAFETY

When the thermostat calls for heat and the burner starts normally but
then locks out on safety after about 15 seconds:

1. Improper setting of combustion air (too much air).

1. Dirt or water in the supply line.

2. Pump loosing prime.

3. Bad motor.

4. Erratic or low pressure at fuel pump.

5. Defective pump.

6. Loose wiring or connections.

7. Clogged or damaged nozzle.

8. Oil tank empty.

9. Oil tank not vented.

10.Clogged filter in oil line.

11.Ice in fuel line.

COMBUSTION TEST

SPECIFICATIONS

2. Weak or dirty flame detector.

3. Improper positioning of flame detector.

4. Bad flame detector.

5. Wiring from flame detector to primary not continuous or not making
good contact.

6. Bad safety primary control.

7. Clogged, defective or undersized nozzle.

SAFETY PRIMARY CONTROL

Normal Burner Cycle

Although a normal burner cycle does not create a service problem, it is
important to know what happens to better understand the problem when
the unit is not operating properly.

The instant the thermostat calls for heat, the flame detector sees darkness
and causes the sensor to conduct current. When the sensor conducts
current, the motor relay coil pulls in, starting the burner motor and
energizing the ignition transformer through the motor relay contacts. At
the same instant the motor relay coil pulls in, the safety heater is energized.

When flame is established, the resistance of the flame detector drops
(providing the flame detector can see the flame properly) which causes
the sensor to block the current. When the sensor blocks, the safety
heater drops out of the circuit and the motor relay coil continues to hold in
through a set of holding contacts on the motor relay until the thermostat
is satisfied and the burner shuts down.

FLAME FAILURE AFTER NORMAL IGNITION

If, for some reason, there is a flame out, the flame detector sees darkness
which causes the sensor to conduct current and again energize the safety
heater. In approximately 15 seconds the safety contact will open and
shut down the burner. The safety contacts of the safety primary control
are the manual reset type, which means that the red safety button must
be reset before trying again for ignition. When this occurs, allow about 5
minutes for safety heater to cool before depressing the red safety button.

Depress red button one time only. If burner does not operate after
depressing red button one time, check combustion chamber. If
combustion chamber is soaked with oil the combustion chamber must be
replaced.

Some of the possible reasons for flame failure after normal ignition has
occurred are:

GENERAL

A combustion test kit, capable of testing CO2 content, stack temperature,
draft and smoke must be available to aid in adjusting the unit and filling
out the Oil Burner Certificate. A pressure gauge is needed to measure
and adjust oil pump pressure.

PROCEDURE

1. Check nozzle size, see Table 8 on Page 9.

2. Open air band about halfway and being certain heater is filled with
water, start burner.

3. Check oil pump pressure. It should be 110 psig for the GPO-199 and
100 psig for all other models. Adjust setting as necessary.

4. Allow burner to operate for 15 minutes before proceeding with test.

5. After 15 minutes operation, check the draft in chimney connector,
about halfway between the heater and the draft regulator and adjust
the draft regulator until the correct reading is obtained.

Draft in Chimney .03 to .05

Connector Inches of Water

6. Adjust air band until flame has smoky tips. Immediately increase air
supply until the smoky tips just disappear.

7. Using combustion test kit, check smoke density and CO2 in the chimney
connector.

Preferably No. 1 Spot

Smoke Density (Not Over No. 2 Spot

CO

2

• Adjust air supply with air band to achieve the highest CO2 readings

with an acceptable smoke density reading. Test and readjust as
necessary.

8. Check the stack temperature halfway between the heater and the
draft regulator.

Stack

Temperature

• If stack temperature is too high, check for a soot accumulation in

heater or excessive oil pump pressure.

9. Recheck combustion efficiency against specifications when final
adjustments have been made.

21

9% to 12%

Min. 400°F (204°C)

Max. 600°F (315°C)

TROUBLESHOOTING

TABLE 10 - OIL BURNER TROUBLESHOOTING

TROUBLE CAUSE REMEDY

Oil level below intake line in supply tank. Fill tank with oil.
Clogged strainer or filter. Remove and clean strainer. Replace filter element.
Clogged nozzle. Replace nozzle.
Air leak in intake line. Tighten all fittings in intake line. Tighten unused intake

port plug. Check filter cover and gasket.

Restricted intake line. (High vacuum reading). Replace any kinked tubing and check any valves in

intake line.

No Oil Flow A two line pipe system that becomes air bound. Check for and insert by-pass plug. Make sure return
at Nozzle line is below oil level in tank.

A single line pipe system that becomes air bound. Loosen gauge port plug or air bleed valve and bleed oil

for 15 seconds after foam is gone in bleed hose, Check
intake line fittings for tightness. Check all fuel pump plugs

for tightness.
Slopping or broken coupling. Replace coupling.
Rotation of motor and fuel unit pump is not the
same as indicated by arrow on the pad at top of unit. Install fuel pump with correct rotation.
Frozen fuel pump shaft. Replace fuel pump. Check for water and dirt in tank.
Loosen plugs and fittings. Tighten with good quality thread sealer.
Leak at pressure adjusting screw or nozzle plug. Replace fuel pump.

Oil Leak Blown seal (single-pipe system) Check to see if by-pass plug has been left in fuel pump.

Replace fuel pump.
Seal leaking. Replace fuel pump.
Cover. Tighten cover screws.
Bad coupling alignment. Loosen fuel pump mounting screws slightly and shift

Noisy fuel pump in different positions until noise is eliminated.
Operation Retighten mounting screws.

Air in inlet line. Check all connections. Use only good flare fittings.
Tank turn on two line pipe system and inside tank. Install return line hum eliminator.
Partially clogged strainer or filter. Remove and clean strainer.
Air leak in intake line. Tighten all fittings.
Air leaking around cover. Be sure strainer cover screws are tightened securely.

Check for damaged cover gasket.

Low Oil Defective gauge Check gauge against master gauge or other gauge.
Pressure Nozzle capacity is greater than fuel pump capacity. Replace fuel unit with unit of correct capacity.

To determine the cause of improper cut-off, insert
a pressure gauge in the nozzle port of the fuel pump.
After a minute of operation, shut burner down. If the
pressure drops from normal operating pressure and
stabilizes, the fuel pump is operating properly and air
is the cause of improper cut-off. If, however, the
pressure drops to 0 psi, fuel unit should be replaced.

Improper NOTE: Never use the amount of pressure drop as an
Nozzle indication of the quality or speed of cut-off.
Cut-Off Filter leaks. Check face of cover and gasket fro damage.

Strainer cover loose. Tighten 4 screws on cover.
Air pocket between cut-off valve and nozzle. Run burner, stopping and starting unit, until smoke

and after-fire disappears.
Air leak in intake line. Tighten intake fittings. Tighten unused intake port and

return plug.
Partially clogged nozzle strainer. Clean strainer or change nozzle.
Leak at nozzle adaptor. Change nozzle and adaptor.

22

OIL

COMMERCIAL OIL FIRED W ATER HEA TER

REPLACEMENT P ARTS LIST

MODEL GPO XX - 199, 245, 315, 385, 455 & 700

AND GPO XX - 315A, 385A, 455A & 700A

ITEM NO. 13

STATE WATER HEATERS

500 Lindahl Parkway, Ashland City, TN 37015

Phone: [phone] • Fax: [phone]

www.stateind.com

23

ITEM NO. 25

CLEANOUT ASSEMBLY

GPO 86 GPO 86 GPO 84 GPO 75 GPO 75 GPO 69

ITEM DESCRIPTION 199 245 315 385(A) 455(A) 700(A)

1 .... *Anode...................................183523-42(2) ... 183523-42(2)...... 183523-42(2) .......183523-39(3) ....... 183523-39(3)..... 183523-39(4)

2 .... Baffle, Flue.............................39616-13(6) ..... 39616-13(6)........ 39616-13(7) .......39616-13 (12)....... 39616-13(12)..... 39616-13(16)

3 .... Base, Jacket w/skids..................76242 ............... 76242.................. 76242 ...................76242 ................... 76242.................76242

4 .... Bolt, Base ................................. 41431(4) .......... 41431-(4) ............ 41431-(4) ............. 41431(4) ............... 41431(4) ............41431(4)

5 .... Chamber, Combustion ............. 76508-1.............76508-1 .............. 76508-1 ............... 76508-1 .................76508-1 ............. 76508-1

6 .... Channel, Wire ........................... 95312-4.............95312-4 .............. 95312-4 ............... 95312-4.................95312-4 ............. 95312-4

7 .... Clamp ..........................................94694 ............... 94694 .................. 94694 ...................94694 ................... 94694................. 94694

..... CLEANOUT ASSEMBLY

8 .... Gasket...................................... 99038(1) ...........99038(1) .............99038(1).............. 99038(2) ............... 99038(2) ............99038(2)

9 .... Pressure Plate ......................... 99037(1) ...........99037(1) .............99037(1).............. 99037(2) ............... 99037(2) ............99037(2)

10 ... Screw-self Tapping................. 69852-1(6) ....... 69852-1(6).......... 69852-1(6) ..........69852-1(12) .......... 69852-1(6)......... 69852-1(6)

11 ... Collar, Pipe ..............................20172-21 .......... 20172-21 ............ 20172-21 ............. 20172-21............... 20172-21 ........... 20172-21

12 ... Collar, Pipe ............................... 95030-3.............95030-3 .............. 95030-3 ............... 95030-3.................95030-3 ............. 95030-3

13 ... Barometric Draft Control ............ 69803 ............... 69803.................. 69803 ...................69803 ................... 69803................. 69803

14 ... Cover, Cleanout Opening &

..... Observation Port....................181260 ............. 181260................181260 ................ 181260 ................. 181260............... 181260

15 ... Cover, Jacket .............................. 97062 ..............97062-4 .............. 97062-4 ............... 97062-4 .................97062-4 ............. 97062-1

..... *INSULATION,

..... FIBERGLASS SKIRT

..... Top ...................................... 181268-14........ 181268-14 .......... 181268-14 ...........181268-14.............181268-14 ......... 181268-14

..... Bottom ............................................................ 181268-19.......... 181268-19 ...........181268-19.............181268-19 ......... 181268-19

..... Insulation Skirt ...................... - - - - - - ............. - - - - - - .............. - - - - - - ............... - - - - - - ...............191017-2 ........... 191017-2

16... *LABELS

..... Cleanout ..................................78754 ............... 78754.................. 78754 ...................78754 ................... 78754.................78754

..... Combination ...........................192485 ............. 192485................192485 ................ 192485 ................. 192485 ............... 192485

..... Copper Conductor .................192495 ............. 192495................192495 ................ 192495 ................. 192495............... 192495

..... Hot ..........................................192484 ............. 192484................192484 ................ 192484 ................. 192484............... 192484

..... Relief Valve ............................191068 ............. 191068................191068 ................ 191068 ................. 191068 ............... 191068

..... UL ...........................................193657 ........... 193657-1 ............ 193657-2 ............. 193657-3............... 193657-4 ........... 193657-5

..... Inlet.......................................... 94518 ............... 94518.................. 94518 ...................94518 ................... 94518................. 94518

..... Outlet .......................................94519 ............... 94519.................. 94519 ...................94519 ................... 94519.................94519

..... Wiring Diagram ......................193694 ............. 193694................193694 ................ 193695 ................. 193695 ............... 193695

17 ... Gasket, Skirt Ring ......................76443 ............... 76443.................. 76443 ...................76443 ................... 76443................. 76443

18 ... Insulation, Foil-Faced................. 41175 ............... 41175 .................. 41175 ...................41175 ................... 41175 .................41175

19... Jacket.........................................193062 ............. 193062................ 193062 ................ 193064 ................. 193064............... 193066

20 ... Plug, Observation.......................41377 ............... 41377.................. 41377 ...................41377 ................... 41377 ................. 41377

21 ... Reducer, Flue ........................... 99767-2............ - - - - - - .............. - - - - - - ............... - - - - - - ............... - - - - - - ............. 76707-1

22 ... R ing,Flue Collector ....................193022 ............. 193022................193022 ................ 193021 ................. 193021............... 193021

23 ... Skirt Ring ...................................193016 ............. 193016................193016 ................ 193016 ................. 193016............... 193016

24 ... Valve, Drain .............................. 26273-4.............26273-4 .............. 26273-4 ............... 26273-4.................26273-4 ............. 26273-4

25 ... Valve, Relief.............................. 99465-7............. 192467................192467 ................ 192467 ................. 192467.............. 99465-3

26... +WIRE:

..... 16 AWG Stranded,

..... 105°C, AWM & TEW:

..... Black .......................................86578 ............... 86578.................. 86578 ...................86578 ................... 86578................. 86578

..... Red ..........................................86579 ............... 86579.................. 86579 ...................86579 ................... 86579................. 86579

..... White .......................................86580 ............... 86580.................. 86580 ...................86580 ................... 86580................. 86580

..... Yellow ......................................98199 ............... 98199.................. 98199 ...................98199 ................... 98199................. 98199

27 ... *Instruction Manual ....................193472 ............. 193472................193472 ................ 193472 ................. 193472............... 193472

28 ... Thermostat with E.C.O..............192576 ............. 192576................192576 ................ 192576 ................. 192576............... 192576

29 ... Oil Burner

..... Single Stage ..........................193655 ........... 193655-2 ............ 193655-4 .............. 193656 ................193656-2 ........... 193656-4

..... Two Stage ............................193655-1 .......... 193655-3 ............ 193655-5 .............193656-1...............193656-3 ........... 193656-5

..... ........................................................................................................................................................................... 40....................... 50

Item . * Not Illustrated

..... ( ) Quantities shown in parenthesis next to part number.

..... + When ordering wire, indicate length required in inches. (Example: 86578-100 equals 100" Length.)

..... Part numbers underlined are recommended stock items for emergency replacement.

..... Request parts from Product Service Division giving all information such as model and series number.

24