U.S. Boiler Company ESC Mode d’emploi

103790-02 - 9/13

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ammables 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.

USER'S INFORMATION MANUAL

ESC™

Gas - Fired Boiler

The following terms are used throughout this manual to bring attention to the presence of hazards of various risk levels.

CAUTION

Indicates a potentially hazardous situation which,

if not avoided, may result in moderate or minor

injury or property damage.

WARNING

Indicates a potentially hazardous situation which,

if not avoided, could result in death, serious injury

or substantial 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.

Basic Operation

A. General. This water boiler utilizes fan-assisted

combustion and 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 Installation, Operating and

Service Instructions.

1. Limit. See Figure 1. A device which automatically

interrupts boiler operation when the water

temperature exceeds the set point. Maximum

allowable temperature is 220°F.

Original equipment with this boiler is U.S. Boiler

IQ Control and Limit Rated Sensor combination.

The IQ Control shuts off boiler main burners when

boiler water temperature exceeds pre-programmed

IQ control water temperature set point. Boiler main

burners will re-light automatically, providing the call

for heat is present, when boiler water temperature

falls below pre-programmed control water

temperature set point less the set point differential.

2. Flame Rollout Switch. See Figure 1. A device

which automatically interrupts boiler operation

when ames or excessive heat are present in the

combustion area enclosure. The control is a single

use device. The control is located in the combustion

area enclosure. If the control was activated to

interrupt boiler operation, do not attempt to place

boiler in operation. Contact a qualied service

agency.

WARNING

Service on this boiler should be undertaken only

by trained and skilled personnel from a qualied

service agency.

3. Pressure Switch. See Figure 1. A device which

automatically prevents or interrupts boiler

operation when the induced draft blower fails to

move sufcient combustion air for proper burner

operation. Boiler operation resumes automatically

when sufcient combustion air ow is reestablished.

4. Electronic Ignition System. The Electronic Ignition

(EI) System consists of:

a. a solid state ignition control module to initiate,

monitor and stop burner operation. See Figure 1.

b. a combination gas valve to regulate gas ow to

the burners. See Figure 1.

c. a pilot burner to provide the ignition source for

the main burners. See Figure 4.

B. Instructions to place the boiler in operation and to turn

off the boiler are shown on the Operating Instruction

Label posted on the left jacket panel of the boiler. The

Operating Instruction Label is shown in Figure 2.

C. The Sequence of Operation is shown in Figure 3.

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 étre 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.

Figure 1: Control Locations

Figure 2: Operating Instructions

NOTE: YOUR BOILER IS EQUIPPED WITH A HONEYWELL VR8204 OR VR8304 GAS

VALVE. PLEASE FOLLOW THESE OPERATING INSTRUCTIONS:

Figure 3: Sequence of Operation

Thermostat Calls

for Heat

Circulator Output

Energized

Prepurge (30 seconds)

Ignition Source Energized

Pilot Gas On

Blower Starts

Trial For Ignition

Ignition Source Off

Main Gas On

Call For Heat Ends

Standby

Intelligent Hydronic

Control can display

(typical)

Delay 60 Seconds

Ignition Source Off

Pilot Gas Off

Main Gas Off

Blower Off

Circulator Output De-Energized

Standby

Continuous

Retry

Self Testing

Waiting for Pressure

Switch to Open

Waiting for Limit to Close

Waiting for Pressure

Switch to Close

Pilot Flame

Proven

Pilot Flame

Not Proven

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, liquids or sources of hydrocarbons in the

vicinity of the boiler or any other appliance.

3. Do not store or use halogen-containing products

(bleaches, cleaners, fabric softeners, refrigerants,

chemicals, etc.) in the vicinity of the boiler.

B. Inspect Inlet Air and Vent System (Monthly). Check

the following. If corrective action is required contact

qualied service agency.

1. Inlet air terminal and vent terminal must be free of

obstruction, undamaged, with screens securely in

place.

2. Inlet air terminal, vent terminal, and wall thimble (if

used) must be weather-tight.

3. Inlet air pipe and vent pipe must be full round

shape, showing no damage from impact or excessive

temperature.

4. Inlet air pipe and vent pipe must be supported at

minimum 5 foot intervals and must not sag.

5. All inlet pipe joints must be secure and airtight.

6. All vent pipe joints must be secure and watertight.

7. Condensate drain (if used) must have minimum 6

inch trap and allow condensate to ow freely. To

clean:

a. Disconnect condensate drain from drain tting.

b. Flush condensate drain with water.

c. Securely fasten condensate drain to drain tting,

providing gas-tight and water-tight seal.

C. Inspect Pilot and Main Burner Flames (Monthly).

1. Remove jacket front panel.

2. View ames through combustion area enclosure.

See Figure 1.

3. Adjust thermostat to highest setting.

4. Check pilot ame. See Figure 4. The pilot produces

three (3) ames. The center ame should be steady,

medium hard blue enveloping 3/8to ½ inch of

sensing probe. If ame is yellow and lazy, follow

instructions TO TURN OFF GAS TO APPLIANCE

(see Figure 2), and contact qualied service agency.

5. Check main burner ames. See Figure 5. Flame

should have clearly dened inner cone 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 2), and contact qualied service agency.

6. Adjust thermostat to normal setting.

D. 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.

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.

Figure 4: Pilot Burner

Figure 5: Main Burner Flame

All ESC™ Series Repair Parts may be obtained through your local U.S. Boiler Company product distributor.

Should you require assistance in locating a U.S. Boiler Company product distributor in your area, or have

questions regarding the availability of U.S. Boiler Company brand products or repair parts, please contact

U.S. Boiler Company Customer Service at (717) 481-8400 or Fax (717) 481-8408.

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