U.S. Boiler Company INDEPENDENCE Guide

103539-02 - 8/13
LAUNAMNOITAMROFNIS'RESU
ECNEDNEPEDNI
®
RELIOBDERIF-SAG
WARNING: If the information in this
manual is not followed exactly, a re or
explosion may result causing property
damage, personal injury or loss of life.
-Do not store or use gasoline or other
ammable vapors and liquids in the
vicinity of this or any other appliance.
-WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do
not use any phone in your building.
• Immediately call your gas supplier
from a neighbor's phone. Follow the
gas supplier's instructions.
• If you cannot reach your gas supplier,
call the re department.
-Installation and service must be
performed by a qualied installer, service
agency or the gas supplier.
AVERTISSEMENT. Assurez-vous de
bien suivre les instructions données
dans cette notice pour réduire au
minimum le risque d'incendie ou
d'explosion ou pour éviter tout
dommage matériel, toute blessure ou
la mort.
-Ne pas entreposer ni utiliser d'essence
ni d'autres vapeurs ou liquides inam-
mables dans le voisinage de cet
appareil ou de tout autre appareil.
- QUE FAIRE SI VOUS SENTEZ UNE
ODEUR DE GAZ:
• Ne pas tenter d'allumer d'appareils.
• Ne touchez à aucun interrupteur. Ne
pas vous servir des téléphones dans le
bâtiment où vous vous trouvez.
• Appelez immédiatement votre
fournisseur de gaz depuis un voisin.
Suivez les instructions du fournisseur.
• Si vous ne pouvez rejoindre le
fournisseur de gaz, appelez le service
des incendies.
-L'installation et I'entretien doivent
être assurés par un installateur ou un
service d'entretien qualié ou par le
fournisseur de gaz.

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The following terms are used throughout this manual to bring attention to the presence of hazards of various risk levels.
WARNING
Indicates a potentially hazardous situation
which, if not avoided, could result in death,
serious injury or substantial property damage.
CAUTION
Indicates a potentially hazardous situation
which, if not avoided, may result in moderate or
minor injury or property damage.
Important Product Safety Information
Refractory Ceramic Fiber Product
Warning:
The Repair Parts list designates parts that contain refractory ceramic fibers
(RCF). RCF has been classified as a possible human carcinogen. When
exposed to temperatures about 1805°F, such as during direct flame contact,
RCF changes into crystalline silica, a known carcinogen. When disturbed as a
result of servicing or repair, these substances become airborne and, if inhaled,
may be hazardous to your health.
AVOID Breathing Fiber Particulates and Dust
Precautionary Measures:
Do not remove or replace RCF parts or attempt any service or repair work
involving RCF without wearing the following protective gear:
1. A National Institute for Occupational Safety and Health (NIOSH)
approved respirator
2. Long sleeved, loose fitting clothing
3. Gloves
4. Eye Protection
• Take steps to assure adequate ventilation.
• Wash all exposed body areas gently with soap and water after contact.
• Wash work clothes separately from other laundry and rinse washing
machine after use to avoid contaminating other clothes.
• Discard used RCF components by sealing in an airtight plastic bag. RCF
and crystalline silica are not classified as hazardous wastes in the United
States and Canada.
First Aid Procedures:
• If contact with eyes: Flush with water for at least 15 minutes. Seek
immediate medical attention if irritation persists.
• If contact with skin: Wash affected area gently with soap and water.
Seek immediate medical attention if irritation persists.
• If breathing difficulty develops: Leave the area and move to a location
with clean fresh air. Seek immediate medical attention if breathing
difficulties persist.
• Ingestion: Do not induce vomiting. Drink plenty of water. Seek
immediate medical attention.

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A. General This boiler is equipped with controls for
proper operation. All controls must be in proper
working order. Contact a qualied service agency
to provide annual maintenance as specied in the
Installation, Operating and Service Instructions.
WARNING
Service on this boiler should be undertaken only
by trained and skilled personnel from a qualied
service agency.
1. Limit A device which automatically interrupts
boiler operation when the steam pressure exceeds
the set point. See Figure 1. Maximum allowable
pressure is 15 psi. Steam pressure can be read on the
Pressure Gauge.
Basic Operation
Figure 1: Control Locations
CAUTION
Should overheating occur or the gas supply fail to shut off, do not turn off or disconnect the electrical
supply to the pump. Instead, shut off the gas supply at a location external to the appliance.
En cas de surchauffe ou si I'admission de gaz ne peut être coupée, ne pas couper ni débrancher
l'alimentation électrique de la pompe. Fermer plutôt le robinet d'admission de gaz à l'extérieur de I'appareil.
Do not use this boiler if any part has been under water. Immediately call a qualied service technician to
inspect the boiler and to replace any part of the control system and any gas control which has been under
water.
2. Low Water Cutoff A device which automatically
interrupts boiler operation when the surface of the
boiler water falls to the lowest permissible operating
level. See Figure 1. The lowest permissible
operating level is indicated on a plate adjacent to
the gauge glass. The low water cutoff automatically
resets when water returns to its normal level. Boiler
operation resumes with a call for heat.
3. Blocked Vent Switch See Figure 7. A device
which automatically interrupts boiler operation
when excessive vent system blockage occurs. Do
not attempt to place boiler in operation if control
was activated to interrupt boiler operation. Contact
a qualied service agency.
CAUTION
Do not reset Blocked Vent Switch unless a
qualied service agency has determined and
corrected the cause of any blockage in the vent
system or chimney.

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4. Flame Rollout Switch See Figure 2. A device
which automatically interrupts boiler operation
when ames or excessive heat are present in the
vestibule. The control is a single use device. Do not
attempt to place boiler in operation if control was
activated to interrupt boiler operation. Contact a
qualied service agency.
5. Intermittent Ignition System See Figure 1. The
Electronic Ignition (EI) System consists of:
a. an ignition module to initiate, monitor and stop
burner operation.
b. a combination gas valve to regulate gas ow to
burners.
c. a pilot burner to provide the ignition source for
main burners.
6. Continuous Ignition System (Standing Pilot) See
Figure 1. The Continuous Ignition System consists
of:
a. a combination gas valve to regulate gas ow to
burners.
b. a constant burning pilot burner to provide the
ignition source for main burners.
c. a thermocouple to sense pilot burner ame and
cause combination gas valve to turn off main
burner and pilot burner gas ow should pilot
burner ame extinguish.
Figure 2: Flame Rollout Switch
Figure 3: Jacket Front Panel Removal
B. Instructions to place boiler in operation and to turn
off boiler are shown on the Lighting or Operating
Instruction label posted on the inside of the front
removable door. See Figure 3 for front door removal
instructions. The Lighting/Operating Instructions are
also shown in Figures 4, 5 and 6. The boiler model
number is printed on the rating label (see Figure 1).

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Figure 4: Operating Instructions, Intermittent Ignition System, VR8204 and VR8304
(except Model IN12) Gas Valves

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Figure 5: Lighting Instructions, Continuous Ignition System, 7000 ERHC Gas Valve

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Figure 6: Operating Instructions, Intermittent Ignition System, VR8304 Gas Valves (Model IN12 Only)

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Figure 7: Typical Vent System Installation
User Maintenance
A. General Housekeeping (Continuous)
1. Keep boiler area clear and free of combustible
materials and obstructions to the free ow of
combustion and ventilation air to the boiler.
2. Do not store or use gasoline or other ammable
vapors or liquids in the vicinity of the boiler or any
other appliance.
3. Do not store or use sources of hydrocarbons in the
vicinity of the boiler. Sources of hydrocarbons
include bleaches, cleaners, chemicals, sprays, paint
removers, fabric softeners, cat litter and refrigerants.
B. Flush Low Water Cutoff (Weekly, or more
frequently if needed). Applicable to McDonnell
& Miller 67 oat low water cutoff only. Follow
instructions on Blow-Down Card afxed to Jacket
adjacent to low water cutoff.
C. Inspect Vent System (Monthly). See Figure
7. Follow instructions TO TURN OFF GAS TO
APPLIANCE (see Figure 4, 5 or 6) and contact
a qualied service agency if any of the following
conditions are found:
1. Collapsed vent pipe
2. Disconnected or loose joints
3. Sags in horizontal runs
4. Corrosion or other deterioration
5. Broken or loose supports
6. Blocked vent switch not attached to draft hood.
D. Inspect Pilot and Main Burner Flame (Monthly).
1. Adjust thermostat to lowest setting.
2. Remove front removable panel. See Figure 3.
3. Locate Pilot Observation Port. See Figure 2.
4. Check pilot burner ame.
a. Intermittent Ignition (EI), see Figure 9. The
pilot burner produces three (3) ames. The
center ame should be steady, medium hard blue
enveloping 3/8 to ½ inch of sensing probe. If
ames are yellow and lazy, follow instructions
TO TURN OFF GAS TO APPLIANCE
(see Figure 4 for Models IN3I through IN11 or
Figure 6 for Model IN12) and contact a qualied
service agency.
b. Continuous Ignition (Standing Pilot), Models
IN10 - IN12. See Figure 8. Pilot burner
produces three (3) ames. The center ame
should be steady, medium hard blue enveloping
3/8 to ½ inch of thermocouple. If ames are
yellow and lazy, follow instructions TO TURN
OFF GAS TO APPLIANCE (see Figure 5) and
contact a qualied service agency.
5. Adjust thermostat to highest setting.
6. Check main burner ames. See Figure 10 or 11.
Flame should have clearly dened inner cones with
no yellow tipping. Orange-yellow streaks caused
by dust should not be confused with true yellow
tipping. If yellow ames are observed, follow
instructions TO TURN OFF GAS TO APPLIANCE
(see Figure 4, 5 or 6) and contact a qualied service
agency.
7. Adjust thermostat to normal setting.
WARNING
Service on this boiler should be undertaken only by trained and skilled personnel from a qualied service
agency. Inspections should be performed at intervals specied in Installation, Operating and Service
Instructions and this manual. Maintain manuals in a legible condition.
Keep boiler area clear and free of combustible materials, gasoline and other ammable vapors and liquids.
Do not place any obstructions in boiler room that will hinder ow of combustion and ventilation air.

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Figure 8: Pilot Burner Flame, Continuous Ignition
System, Honeywell Q327 Pilot
Figure 9: Pilot Burner Flame, Intermittent Ignition
System (EI), Honeywell Q3481 Pilot
E. ScheduleInspectionbyQualiedServiceAgency
(Annual or at Beginning of Heating Season). For
continued safe operation a qualied service agency
must provide a more detailed inspection of burners, heat
exchanger and vent system, and provide maintenance
as specied in Installation, Operating and Service
Instructions.
Figure 10: 1 Inch Main Burner Flame
Figure 11: 40mm Main Burner Flame
NOTICE
This boiler contains controls which may cause the boiler to shut down and not restart without service.
If damage due to frozen pipes is a possibility, the heating system should not be left unattended in cold
weather; or appropriate safeguards and alarms should be installed on the heating system to prevent
damage if the boiler is inoperative.
All Independence®Series Repair Parts may be obtained through your local U.S. Boiler wholesale distributor. Should you
require assistance in locating a U.S. Boiler distributor in your area, or have questions regarding the availability of U.S. Boiler
products or repair parts, please contact U.S. Boiler Company Customer Service at [phone] or Fax [phone].

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SERVICE RECORD
DATE SERVICE PERFORMED

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SERVICE RECORD
DATE SERVICE PERFORMED

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