State Industries Water Heater GPO 86 199 User Manual

MODELS GPO 86-199 THRU GPO 69-700(A)  
COMMERCIAL OIL FIRED WATER HEATER FOR HOT WATER SUPPLY  
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 HEATER AND  
NOTIFY OWNER TO KEEP FOR FUTURE REFERENCE.  
PRINTED IN U.S.A. 0303  
PART NO.195092-000  
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TABLE OF CONTENTS  
FEATURES AND SPECIFICATIONS ................................................... 2  
APPROVALS ....................................................................................... 3  
IDENTIFICATION  
Oil and Burner Nameplate Decal ............................................... 3  
Oil Burner Specifications ............................................................ 4  
SAFETY ............................................................................................... 4  
INSTALLATION  
High Limit Switch E.C.O. ............................................................ 10-11  
Burner Certificate (Combustion Test) ......................................... 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 INFORMATION  
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 SPECIFICATIONS ............................................ 21  
TROUBLESHOOTING ......................................................................... 22  
REPLACEMENT PARTS LIST ............................................................. 23-24  
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.  
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.  
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.  
The heater model number is structured as follows:  
OIL BURNER NAMEPLATE 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 NAMEPLATE DECAL  
FIGURE 2  
3
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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.  
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.  
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  
GENERAL  
R.W.  
Becket  
Burner  
Model  
Suntec  
Oil  
Pump  
Nozzle Type  
The installer should be guided by these instructions, local codes and the  
following publications.  
State  
Burner  
Series  
Safety  
Timing  
+
Oil Pump  
Type  
Mode  
Spray  
Spray  
Standards for the Installation of Oil Burning Equipment, NFPA  
Standard No. 31, Available from National Fire Protection  
Association, Batterymarch Park, MA 02269.  
Number*  
Number  
Pattern Angle  
A2VA  
7118  
-
A2YA-  
7916  
B2VA  
8216  
-
AFG  
SF  
Type B  
940  
941  
15 Sec.  
Single  
Stage  
Solid  
Cone  
80°  
80°  
Code for the Installation of Heat Producing Appliances,  
Available from American Insurance Association, 85 John Street,  
New York, NY 10038.  
Type B  
Solid  
AFG  
SF  
15 Sec.  
15 Sec.  
Two-  
Stage  
• The National Electrical Code, ANSI/NFPA No. 70-1996. Availability  
same as NFPA Standard No. 31-1997.  
BY2A  
8916  
Cone  
• In Canada - CSA Standard No. B139, Installation Code for Oil Burning  
Equipment.  
*
To provide the proper firing rate for each model heater, see SPECIFICATIONS:  
there are burner models for each heater model in table 2.  
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.  
+
All oil burners are UL defined as having "interrupted ignition" . . . meaning the  
ignition is on during the flame establishing period only. Ignition is off when the  
burner is off. Standard safety timing is 15 seconds.  
Do not test the burner or control system before the heater is filled with  
water. Follow the START-UP procedure in this manual.  
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.  
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.  
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.  
LEVELLING  
IMPORTANT  
Install the heater plumb to the ground. If it is necessary to adjust the  
heater, use metal shims under the channel type skid base.  
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.  
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.  
GPO 86 GPO86 GPO 84 GPO 75 GPO 75 GPO 69  
Model Heater 199  
Min. State  
245  
315/315A 385/385A 455/455A 700/700/A  
Firing Burner  
Rate  
1.42  
1.75  
2.25  
2.0  
2.75  
2.5  
3.25  
3.0  
5.0  
4.5  
For the best installations, the water heater should be located:  
1. On a level surface.  
In  
Non  
GPH State  
Burner  
1.1  
1.5  
Shim the channel type skid base as necessary If leveling is required.  
2. Near a floor drain.  
SAFETY  
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.  
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 WATER. WHEN REPLACING FUSES ALWAYS USE THE  
CORRECT SIZE FUSE FOR CIRCUIT.  
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.  
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.  
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The discharge opening of the relief valve should always be piped  
to an open drain.  
COMBUSTION AND VENTILATION AIR  
GENERAL  
Choose the point of major hot water usage, fuel supply and chimney.  
Try to make hot water and oil piping as short as possible.  
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.  
Insulate hot and cold water piping where heat loss and condensation  
may be a problem.  
CLEARANCES  
CHEMICAL VAPOR CORROSION  
The heater has minimum clearances to combustible material, on a non-  
combustible 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.  
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.  
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.  
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.  
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.  
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.  
PROPER INSTALLATION ON COMBUSTIBLE FLOORING  
FIGURE 3  
Follow the instructions under Part 2 of Confined Spaces (Room  
Construction)  
NOTE: If electrical conduits run under the floor of the proposed heater  
location, insulate the floor as recommended above.  
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 AT FRONT OF HEATER  
REQUIRED AERATION FOR APPLIANCE INSTALLATION  
IN A CONFINED SPACE WITHIN A CONVENTIONALLY  
CONSTRUCTED BUILDING  
FACTORY FURNISHED HEATER MANIFOLD KITS (OPTIONAL)  
ARE DESIGNED FOR 10" (254 mm) SPACING BETWEEN SIDES  
OF ADJACENT UNITS.  
FIGURE 4  
5
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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 mm2/kW) (35 square inches per  
gallon of oil consumed per hour) of total input rating of all appliances  
in the enclosure.  
TABLE 4 SUGGESTED VENT CONNECTOR SIZES  
Outlet Diameter  
Model Number  
GPO 86-199*  
GPO 86-245  
Inches  
(mm)  
152.4  
203  
6
8
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 mm2/kW) (70 square inches per gallon of oil consumed per  
hour) of total input of all appliances in the enclosure, fig. 5.  
GPO 84-315/315A  
GPO 75-385/385A  
GPO 75-455/455A  
GPO 69-700/700A  
8
8
8
10  
203  
203  
203  
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.  
APPLIANCE AERATION FROM OUTDOORS (OPTIONAL  
FOR CONVENTIONAL BUILDINGS, MANDATORY  
FOR TIGHT BUILDINGS)  
FIGURE 5  
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.  
PROPER VENT CONNECTOR INSTALLATION  
FIGURE 6  
CHIMNEY  
VENT CONNECTOR AND DRAFT REGULATOR  
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.  
The chimney or vent connector diameter should be the same size as the  
heater flue outlet, see Table 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  
Firing  
Rate  
Equivalent  
Heat Input  
Rate  
Output  
Heat  
Rate  
Square & Rectangle  
Stack  
Round Stack  
Diameter  
Minimum  
Height  
Model  
Dimension  
Number  
(GPH) (LPH)  
Btuh  
kW  
Btuh  
kW  
47  
57  
74  
90  
Inches  
mm  
Inches  
mm  
228.6  
228.6  
254  
Feet  
Metres  
6.1  
GPO 86 -199  
GPO 86 -245  
1.42  
1.75  
2.25  
2.75  
3.25  
5
5.38  
6.62  
199,000  
245,000  
315,000  
58  
72  
92  
159,200  
196,000  
252,000  
8 1/2 X 8 1/2 216 x 216  
8 1/2 X 8 1/2 216 x 216  
9
20  
20  
30  
30  
35  
40  
9
6.1  
GPO 84-315 (A)  
GPO 75 -385 (A)  
GPO 75 -455 (A)  
GPO 69 -700 (A)  
8.52  
8 1/2 X 13  
8 1/2 X 13  
13 X 13  
216 x 330  
216 x 330  
330 x 330  
330 x 457  
10  
10  
12  
14  
9.1  
10.41  
12.30  
18.93  
385,000 113 308,000  
254  
9.1  
455,000 133 364,000 107  
700,000 205 560,000 164  
304.8  
355.6  
10.7  
12.2  
13 X 18  
6
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MULTIPLE HEATER FLUES  
DRAIN VALVE 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.  
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.  
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  
cham
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  
COMBUSTION CHAMBER ACCESS PORT - FIGURE 7  
GENERAL  
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.  
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  
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.  
TANK CLEANOUT PORT - FIGURE 8  
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.  
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.  
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 VALVES BETWEEN THE HEATER 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.  
Occasionally, some water seepage will occur at a cleanout port. To 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-NFPA 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.  
Your 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.  
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.  
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.  
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
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TABLE 6  
Distance  
Tank  
Bottom  
Below  
Pump  
Plug  
Max.  
Run length  
Ft. (M)  
Distance  
Max.  
Run Length  
Ft. (M)  
Tank  
Bottom  
Below  
Pump  
Plug  
3/8"  
1/2"  
O.D.  
3/8"  
1/2"  
O.D.  
O.D.  
O.D.  
Ft. (M)  
1 (0.3)  
2 (0.6)  
3 (0.9)  
4 (1.2)  
5 (1.5)  
Tubing  
Tubing  
Ft. (M)  
6 (1.8)  
7 (2.1)  
8 (2.4)  
9 (2.7)  
10 (3.0)  
Tubing  
Tubing  
66 (20.1) 100 (30.4)  
55 (16.7) 100 (30.4)  
50 (15.2) 100 (30.4)  
45 (13.7) 100 (30.4)  
40 (12.1) 100 (30.4)  
36 (10.9) 100 (30.4)  
31 (9.4)  
26 (7.9)  
21 (6.4)  
16 (4.8)  
100 (30.4)  
100 (30.4)  
83 (25.2)  
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 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).  
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.  
A GRAVITY FEED, SUPPLY LINE ONLY, INSTALLATION  
FIGURE 10  
TABLE 7  
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.  
Distance  
Tank  
Bottom  
Below  
Pump  
Plug  
Max.  
Run length  
Ft. (M)  
Distance  
Tank  
Bottom  
Below  
Pump  
Plug  
Max.  
Run Length  
Ft. (M)  
3/8"  
O.D.  
1/2"  
O.D.  
3/8"  
O.D.  
1/2"  
O.D.  
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.  
Ft. (M)  
1 (0.3)  
2 (0.6)  
3 (0.9)  
4 (1.2)  
5 (1.5)  
6 (1.8)  
7 (2.1)  
8 (2.4)  
Tubing  
Tubing  
Ft. (M)  
9 (2.7)  
Tubing  
Tubing  
74 (22.5) 100 (30.4)  
71 (21.6) 100 (30.4)  
69 (21.0) 100 (30.4)  
66 (20.1) 100 (30.4)  
63 (19.2) 100 (30.4)  
60 (18.2) 100 (30.4)  
57 (17.3) 100 (30.4)  
54 (16.4) 100 (30.4)  
51 (15.5) 100 (30.4)  
48 (14.6) 100 (30.4)  
45 (13.7) 100 (30.4)  
42 (12.8) 100 (30.4)  
39 (11.8) 100 (30.4)  
37 (11.2) 100 (30.4)  
34 (10.3) 100 (30.4)  
10 (3.0)  
11 (3.3)  
12 (3.6)  
13 (3.9)  
14 (4.2)  
15 (4.5)  
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.  
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 INSTALLATION  
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 IDENTIFICATION,  
page 3.  
A SINGLE STAGE (LOW LIFT), SUPPLY AND RETURN  
LINE INSTALLATION - FIGURE 11  
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BURNER  
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.  
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 .  
Ground the heater in accordance with the NEC code to guard  
against electrical shock from the heater or water system.  
1. Place the flange gasket and combustion chamber seal over the burner  
tube.  
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).  
2. Place the burner flange on the studs and into the heater flange opening.  
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)  
Non  
State  
Burner Burner  
Oil Burner  
Pump  
Non-Setting  
Oil Burner  
Nozzle  
Rating  
Oil Burner  
Nozzle  
Spec.  
Heater  
Model  
State  
PSIG  
(GPH)  
GPO 86 -199  
GPO 86-245  
GPO 84-315/315A 2.25  
GPO 75-385/385A 2.75  
GPO 75-455/455A 3.25  
GPO 69-700/700A 5.00  
1.42  
1.75  
1.1  
1.5  
2.0  
2.5  
3.0  
4.5  
110  
100  
100  
100  
100  
100  
1.35 x 80°B  
1.75 x 80°B  
2.25 x 80°B  
2.75 x 80°B  
3.25 x 80°B  
5.00 x 80°B  
1.35  
1.75  
2.25  
2.75  
3.25  
5.00  
FUEL PUMP  
GENERAL  
ASSEMBLY OF THE OIL BURNER TO THE HEATER  
FIGURE 13  
All heaters are shipped with the pump pressure set at 100 psig except  
the GPO 86-199 which is set at 110 psig.  
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.  
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.  
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 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 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:  
The two-stage pumps are for two-pipe lift installations where the inlet  
vacuum does not exceed 20" hg. vacuum.  
Route the 120 volt incoming line in the dual bulb thermostat,  
mounted on the side of the heater.  
AIR BLEED PROCEDURE (Refer to oil burner manual).  
FIGURE 14  
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OPERATION  
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 DEATH. THE TEMPERATURE AT 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.  
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.  
THE WATER HEATER SHOULD BE LOCATED IN AN AREA WHERE  
THE GENERAL PUBLIC DOES NOT HAVE ACCESS TO SET  
TEMPERATURES.  
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.  
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.  
START-UP  
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.  
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.  
Temperature  
Setting  
Time to Produce 2nd & 3rd  
Degree Burns on Adult Skin  
Repair any water and oil leaks. Tighten electrical and flue  
connections as necessary.  
180°F (82.2°C)  
170°F (76.6°C)  
160°F (71.1°C)  
150°F (65.5°C)  
140°F (60.0°C)  
130°F (54.4°C)  
120°F (48.9°C)  
Nearly instantaneous  
Nearly instantaneous  
About 1/2 second  
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.  
About 1-1/2 seconds  
Less than 5 seconds  
About 30 seconds  
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.  
More than 5 minutes  
3. Adjust the heater mounted control as follows:  
FIGURE 16  
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.  
Values 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.  
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.  
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.  
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.  
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.  
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.  
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.  
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TABLE 9 SUGGESTED MAINTENANCE SCHEDULE  
Semi-  
Relief Valve  
Lift Lever  
Flushing  
Sediment  
Removal  
Anode  
Annually  
Monthly  
Semi-  
Annually  
Semi  
Tank  
Inspection  
Lime Scale  
Removal  
Annually  
As  
UN•LIME®  
Delimer  
Required  
Four  
Circulating  
Pump  
SAE No. 20 non-detergent  
motor oil  
Oiling  
Inspection  
and  
Months  
Combustion test  
kit & test specifications  
(Page 26)  
DUAL-BULB THERMOSTAT (COVER REMOVED)  
FIGURE 17  
Semi-  
Annually  
Semi-  
Oil Burner  
Adjustment  
Nozzle  
BURNER CERTIFICATE (COMBUSTION TEST)  
Replacement  
Annually  
New Nozzle  
Wire Brush  
Flue Baffle  
Pipe  
The Commercial Standard CS75 Oil Burner Certificate form must be filled  
in and posted in the vicinity of the water heater.  
Cleaning  
Inspected  
Annually  
Semi-  
Venting  
System  
Annually  
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.  
RELIEF VALVES  
DRAINING  
At least twice a year, the system relief valves should be checked to ensure  
that they are in operating condition. To 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.  
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 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.  
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.  
DANGER  
5. If the heater is being drained for an extended shutdown, it is suggested  
the drain valve be left open during this period.  
BEFORE MANUALLY OPERATING A RELIEF VALVE, MAKE SURE  
THAT DRAIN LINE HAS BEEN ATTACHED TO 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.  
Following FILLING instructions when restarting hot water service.  
MAINTENANCE  
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.  
GENERAL  
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.  
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.  
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.  
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.  
FLUSHING  
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.  
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.  
Following are the instructions for performing some of the recommended  
maintenance. Oil burner inspection and adjustment should be performed  
by a competent technician.  
4. Turn on the oil burner electrical disconnect switch.  
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5. Inspect cleanout plate gasket. If new gasket is required, replace with  
State Part no. 99038.  
SEDIMENT REMOVAL  
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.  
6. Install cleanout plate. Be sure to draw plate up tight by tightening  
screws securely.  
For convenience, sediment removal and lime scale removal should be  
performed at the same time.  
7. Fill the water heater according to the FILLING section on Page 10..  
8. Check for water leakage.  
LIME SCALE REMOVAL  
9. Replace outer jacket cover plate.  
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.  
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.  
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® to  
flow into the heater as rapidly as possible.  
WATER USAGE IN GALLONS PER DAY POUNDS OF LIME  
DEPOSITED VS. TEMPERATURE AND WATER USAGE  
Be sure to keep the vent just above the liquid level.  
Lime accumulation not only reduces the life of the equipment but also  
reduces efficiency of the heater and increases fuel consumption.  
4. Place the Flow-Jug in the DELIME POSITION.  
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.  
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.  
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.  
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.  
To dissolve and remove the more stubborn mineral deposits, UN•LIME®  
Professional Delimer or equivalent should be used.  
Deliming activity is indicated by foaming on the surface of the  
solution.  
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.  
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.  
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..  
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.  
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.  
Drain the UN•LIME® back into jug, DRAIN POSITION, and then  
stand jug in DELIME POSITION.  
4. Remove lime, scale. or sediment using care not to damage the glass  
lining.  
Remove clamp, hose and pipe nipple from heater drain opening.  
12  
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Observe interior through opening - a small flashlight may be used  
effectively.  
SOOT REMOVAL  
Soot must be removed semi-annually from the heater and flow passages  
to insure efficient operation of the heater.  
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.  
A TYPICAL HEATER FLUEWAY 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.  
DELIMING THE GPO WATER HEATER  
FIGURE 18  
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.  
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 Flo-  
Jug.  
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  
9. When flushing is completed:  
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).  
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.  
6. Return the heater to operation by following the start-up instructions  
on page 10.  
VENT SYSTEM  
10.Flo-Jug Cleanup.  
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.  
Allow scale to separate from UN•LIME® and settle on bottom  
of Flo-Jug.  
ANODE ROD INSPECTION  
Pour off UN•LIME® into plastic container and check for reuse.  
Rinse sediment from Flo-Jug.  
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.  
If UN•LIME® is reusable , pour back into Flo-Jug. Be sure to plug  
vent and cap opening.  
CIRCULATING PUMP  
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.  
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.  
13  
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INSTALLATION DIAGRAMS  
ONE TEMPERATURE - ONE HEATER VERTICAL STORAGE TANK FORCED  
CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION  
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.  
NOTE:  
WHEN USING A STATE T-140,200,350,OR 400 STORAGE TANK,  
USE LOWER 3/4" (19 mm) OPENING FOR TANK TEMP.CONTROL  
ONE TEMPERATURE - ONE HEATER HORIZONTAL STORAGE TANK FORCED  
CIRCULATION WITH OR WITHOUT BUILDING RECIRCULATION  
DANGER:  
INSET B  
TEMPERATURE SETTING SHOULD NOT EXCEED SAFE  
TEMPERATURES AT FIXTURES. SEE WATER TEMPERATURE  
CONTROL WARNING ON PAGE 10. IF HIGHER PREHEAT  
ERATURES ARE NECESSARY TO OBTAIN ADEQUATE  
TER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT  
R SUPPLIED TO FIXTURES.  
VACUUM RELIEF VALVE  
INSTALL PER LOCAL CODES.  
INSET A  
INSTALL THERMAL EXPANSION  
TANK IN COLD WATER SUPPLY LINE,  
IF CHECK VALVE OR PRESSURE  
REDUCING VALVE IS USED IN  
SUPPLY.  
WIRING DIAGRAM FOR HEATER TO TANK LOOP  
AND /OR HOT WATER LOOP (IF USED)  
* PIPE TO OPEN DRAIN  
INSTALL IN ACCORDANCE WITH LOCAL CODES  
14  
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SINGLE TEMPERATURE 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 TEMPERATURE - ONE HEATER HIGH TEMPERATURE STORAGE  
WITH OR WITH OUT RECIRCULATION  
INSET B  
VACUUM RELIEF VALVE  
INSTALL PER LOCAL CODES.  
SET A  
STALL THERMAL EXPANSION TANK  
COLD WATER SUPPLY LINE, IF  
ECK VALVE OR PRESSURE  
DUCING VALVE IS USED IN  
PPLY.  
NOT
RETURN LINE SHOULD BE CONNECTED  
AT POINT "A"  
RETURN LINE FROM 180°F (82.2°C)  
CIRCULATING LOOP (IF USED)  
* PIPE TO OPEN DRAIN  
INSTALL IN ACCORDANCE WITH LOCAL CODES  
WIRING DIAGRAM FOR 180°F (82.2°C) LOOP (IF USED)  
WIRING DIAGRAM FOR TEMPERED WATER LOOP  
(IF USED)  
15  
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TWO TEMPERATURE - TWO HEATERS HIGH TEMPERATURE STORAGE  
WITH OR WITHOUT RECIRCULATION  
DANGER:  
INSET B  
INSET A  
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.  
VACUUM RELIEF VALVE  
INSTALL PER LOCAL CODES.  
* PIPE RELIEF VALVE TO OPEN DRAIN  
NOTE: IF TEMPERED WATER IS RECIRCULATED, RETURN LINE  
SHOULD BE CONNECTED AT POINT "A"  
INSTALL THERMAL EXPANSION TANK  
IN COLD WATER SUPPLY LINE, IF  
CHECK VALVE OR PRESSURE  
REDUCING VALVE IS USED IN  
SUPPLY.  
FOR MULTIPLE HEATER INSTALLATION SEE MANIFOLD KIT  
SPECIFICATIONS, PAGES 19.  
INSTALL IN ACCORDANCE WITH LOCAL CODES  
WIRING DIAGRAM FOR 180°F (82.2°C) LOOP (IF USED)  
WIRING DIAGRAM FOR TEMPERED WATER LOOP  
(IF USED)  
16  
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TWO TEMPERATURE - THREE HEATERS (TWO PRE-HEATERS/ONE BOOSTER)  
WITH OR WITHOUT CIRCULATION  
INSET A  
N  
Y  
R  
S  
DANGER:  
INSET B  
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.  
VACUUM RELIEF VALVE  
INSTALL PER LOCAL CODES.  
TWO TEMPERATURE - TWO HEATERS (ONE PRE-HEATER/ONE BOOSTER HEATER)  
WITH OR WITHOUT RECIRCULATION  
WIRING DIAGRAM FOR FIXTURE OR BOOSTER  
LOOP (IF USED) - OTHER THAN DISHWASHER  
WIRING DIAGRAM FOR 180° LOOP (IF USED)  
INSTALL 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.  
CONNECT CIRCULATING LINE FROM FIXTURES, IF USED, TO COLD WATER  
SUPPLY LINE OF PRE-HEATER.  
120°F (48.8°C) SHOULD BE THE MINIMUM TEMPERATURE OF WATER  
STORED IN THE PRE-HEATERS.  
CONNECT CIRCULATING LINE OF 180°F OR BOOSTED WATER, IF USED, TO  
INLET WATER LINE TO BOOSTER.  
17  
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TWO TEMPERATURE-ONE HEATER HIGH TEMPERATURE STORAGE  
WITH RECIRCULATION OF SANITIZING LOOP  
NOTE 1: TOGGLE SWITCH CONTROLS 180°F WATER CIRCULATION.  
INSTALL ON OR CLOSE TO DISHWASHING MACHINE .  
TOGGLE SWITCH MUST BE CLOSED (ON) DURING THE  
RINSE OPERATION AND OPEN (OFF) WHEN DISHWASHER  
IS NOT OPERATING.  
INSET A  
INSTALL THERMAL EXPANSION  
TANK IN COLD WATER SUPPLY  
LINE, IF CHECK VALVE OR  
PRESSURE REDUCING VALVE IS  
USED IN SUPPLY.  
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.  
WIRING DIAGRAM FOR 180° LOOP (IF USED)  
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  
18  
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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 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.  
THREE UNIT MANIFOLD KIT (PART NO. 78693)  
TWO UNIT MANIFOLD KIT (PART NO. 78692)  
FOUR UNIT MANIFOLD KIT (PART NO. 78694)  
2. Check the fuses.  
The oil burner electrical disconnect switch usually contains fuses.  
CHECK LIST AND SERVICE  
INFORMATION  
3. The capacity of the heater may have been exceeded by a large demand  
for hot water.  
IMPORTANT  
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.  
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.  
DANGER  
If the heater was installed when incoming water temperature was  
warm, colder water creates the effect of less hot water.  
BE SURE TO TURN OFF THE ELECTRICITY WHENEVER POSSIBLE  
OR APPROPRIATE WHEN CHECKING EQUIPMENT.  
5. Look for hot water wastage and leaking or open hot water faucets.  
ELECTRICAL WIRING REPLACEMENT  
6. Sediment or lime scale may be affecting water heater operation. Refer  
to MAINTENANCE for details.  
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.  
7. Heater or burner may be dirty.  
NOT ENOUGH OR NO HOT WATER  
Clean all heater flue pipes and flue connector.  
Have burner properly cleaned and readjusted.  
1. Be certain the oil burner electrical disconnect switch serving the water  
heater is in the ON position.  
19  
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8. Burner may not be firing at proper rate.  
Excessive water pressure.  
Excessive water temperature.  
Faulty relief valve.  
Check nozzle size.  
Check fuel pump pressure setting.  
GPO-199 . . . . . . . . . . . 110 psig (758 kPa)  
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.  
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).  
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:  
10.Oil burner fan wheel may be dirty.  
Clean fan wheel with a stiff brush.  
Installation of a second relief valve with lower settings than the  
primary relief valve.  
11. Draft regulator may be stuck.  
Check to see if valve swings freely. Clean, if vane is stuck.  
An expansion tank of suitable size and pressure rating and provision  
to avoid water logging.  
12.Priming control safety reset is open.  
BURNER WON'T START  
Reset safety switch on burner mounted primary control, see  
SAFETY PRIMARY CONTROL, page 21.  
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.  
13.Burner motor safety reset is open.  
CAUTION  
BURNER STARTS-WON'T OPERATE  
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. No oil in tank.  
2. Oil line valve closed.  
1. Flame detector may be sooted or seeing false light and will not let the  
motor relay pull in.  
3. Loose connection in primary control.  
Check and tighten all wire connections, see SAFETY PRIMARY  
CONTROL -page 21.  
2. Loose wiring.  
3. Bad flame detector (mounted inside housing beneath transformer).  
4. Reset red safety button (primary control).  
5. Defective primary control.  
4. Electrode out of adjustment.  
Clean firing head and readjust electrodes.  
5. Clogged burner nozzle.  
6. Reset motor protector.  
Replace with new nozzle, see nozzle chart, page 9, table 8.  
Nozzle should be replaced semiannually.  
BURNER STARTS BUT FAILS TO RUN  
6. Dirty filter.  
Replace element in oil filter.  
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:  
WATER IS TOO HOT  
1. Refer to WATER TEMPERATURE, page 10.  
1. There is insufficient or no oil getting into the combustion chamber.  
2. There is no spark to ignite the oil.  
WATER HEATER MAKES SOUNDS  
If the problem is insufficient or no oil getting into the combustion chamber,  
check for the following:  
1. Sediment or lime scale accumulations cause noises when the tank  
bottom should be cleaned. Refer to MAINTENANCE, page 11-13 for  
details.  
1. Dirt or water in the supply line.  
2. Slipping coupling between motor and pump.  
3. Defective pump.  
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.  
4. Clogged, defective or too small a nozzle.  
5. Oil tank empty.  
WATER LEAKAGE IS SUSPECTED  
6. Clogged filter in oil line.  
1. Check to see if the water heater drain valve is tightly closed.  
7. Restriction or kink in fuel line.  
8. Ice in fuel line.  
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:  
9. Air leak in inlet connections.  
20  
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1. Dirt or water in the supply line.  
2. Pump loosing prime.  
3. Bad motor.  
If the problem is not getting a spark to ignite the oil, check for the following:  
1. Loose wiring.  
2. Red ignition transformer.  
4. Erratic or low pressure at fuel pump.  
5. Defective pump.  
3. Low voltage.  
6. Loose wiring or connections.  
7. Clogged or damaged nozzle.  
8. Oil tank empty.  
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.  
9. Oil tank not vented.  
10.Clogged filter in oil line.  
11. Ice in fuel line.  
NORMAL START, 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:  
COMBUSTION TEST  
SPECIFICATIONS  
1. Improper setting of combustion air (too much air).  
2. Weak or dirty flame detector.  
GENERAL  
3. Improper positioning of flame detector.  
4. Bad flame detector.  
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.  
5. Wiring from flame detector to primary not continuous or not making  
good contact.  
PROCEDURE  
6. Bad safety primary control.  
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.  
7. Clogged, defective or undersized nozzle.  
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.  
SAFETY PRIMARY CONTROL  
4. Allow burner to operate for 15 minutes before proceeding with test.  
Normal Burner Cycle  
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.  
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.  
Draft in Chimney  
Connector  
.03 to .05  
Inches of Water  
6. Adjust air band until flame has smoky tips. Immediately increase air  
supply until the smoky tips just disappear.  
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.  
7. Using combustion test kit, check smoke density and CO2 in the chimney  
connector.  
Preferably No. 1 Spot  
Smoke Density  
CO2  
(Not Over No. 2 Spot  
9% to 12%  
FLAME FAILURE AFTER NORMAL IGNITION  
Adjust air supply with air band to achieve the highest CO2 readings  
with an acceptable smoke density reading. Test and readjust as  
necessary.  
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.  
8. Check the stack temperature halfway between the heater and the  
draft regulator.  
Min.  
400°F (204°C)  
600°F (315°C)  
Stack  
Temperature  
Max.  
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.  
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.  
Some of the possible reasons for flame failure after normal ignition has  
occurred are:  
21  
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TROUBLESHOOTING  
TABLE 10 - OIL BURNER TROUBLESHOOTING  
TROUBLE  
CAUSE  
REMEDY  
Oil level below intake line in supply tank.  
Clogged strainer or filter.  
Clogged nozzle.  
Fill tank with oil.  
Remove and clean strainer. Replace filter element.  
Replace nozzle.  
Air leak in intake line.  
Tighten all fittings in intake line. Tighten unused intake  
port plug. Check filter cover and gasket.  
Replace any kinked tubing and check any valves in  
intake line.  
Check for and insert by-pass plug. Make sure return  
line is below oil level in tank.  
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.  
Restricted intake line. (High vacuum reading).  
A two line pipe system that becomes air bound.  
A single line pipe system that becomes air bound.  
No Oil Flow  
at Nozzle  
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.  
Frozen fuel pump shaft.  
Loosen plugs and fittings.  
Leak at pressure adjusting screw or nozzle plug.  
Blown seal (single-pipe system)  
Install fuel pump with correct rotation.  
Replace fuel pump. Check for water and dirt in tank.  
Tighten with good quality thread sealer.  
Replace fuel pump.  
Check to see if by-pass plug has been left in fuel pump.  
Replace fuel pump.  
Oil Leak  
Seal leaking.  
Replace fuel pump.  
Cover.  
Tighten cover screws.  
Bad coupling alignment.  
Loosen fuel pump mounting screws slightly and shift  
fuel pump in different positions until noise is eliminated.  
Retighten mounting screws.  
Noisy  
Operation  
Air in inlet line.  
Check all connections. Use only good flare fittings.  
Install return line hum eliminator.  
Remove and clean strainer.  
Tank turn on two line pipe system and inside tank.  
Partially clogged strainer or filter.  
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  
Pressure  
Defective gauge  
Check gauge against master gauge or other gauge.  
Replace fuel unit with unit of correct capacity.  
Nozzle capacity is greater than fuel pump 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.  
NOTE: Never use the amount of pressure drop as an  
indication of the quality or speed of cut-off.  
Filter leaks.  
Improper  
Nozzle  
Cut-Off  
Check face of cover and gasket fro damage.  
Tighten 4 screws on cover.  
Strainer cover loose.  
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.  
Leak at nozzle adaptor.  
Clean strainer or change nozzle.  
Change nozzle and adaptor.  
22  
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OIL  
COMMERCIAL OIL FIRED WATER HEATER  
REPLACEMENT PARTS LIST  
MODEL GPO XX - 199, 245, 315, 385, 455 & 700  
GPO XX - 315A, 385A, 455A & 700A  
ITEM NO. 13  
ITEM NO. 25  
CLEANOUT ASSEMBLY  
STATE WATER HEATERS  
500 Lindahl Parkway, Ashland City, TN 37015  
Phone: 800-821-2017 • Fax: 800-644-9306  
23  
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GPO 86  
199  
GPO 86  
245  
GPO 84  
315  
GPO 75  
385(A)  
GPO 75  
455(A)  
GPO 69  
700(A)  
ITEM  
DESCRIPTION  
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 ... Ring,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  
.....  
Two Stage ............................ 193655-1 .......... 193655-3 ............ 193655-5 ............. 193656-1 ............... 193656-3 ........... 193656-5  
..... ........................................................................................................................................................................... 40 ....................... 50  
Single Stage ..........................193655 ........... 193655-2 ............ 193655-4 .............. 193656 ................193656-2 ........... 193656-4  
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  
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