AERCO Modulex 303, Modulex 454, Modulex 606, Modulex 757, Modulex 909 User Manual

y

GAS-FIRED, MODULATING HOT WATER BOILER

USER’S INFORMATION MANUAL

WARNING

If the information in this manual is not followed
exactly, a fire or explosion may result, causing
propert

• Do not store or use gasoline or other flammable 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 fire

damage, personal injury, or loss of life.

department.

• Installation and service must be performed by a qualified
installer, service agency, or the gas supplier.

OCTOBER 16, 2007

USER’S INFORMATION MANUAL

FOR YOUR SAFETY, READ BEFORE OPERATING

A. This appliance does not have a pilot. It is equipped with an ignition device that

automatically lights the burner. Do not try to light the burner by hand.

B. BEFORE OPERATING: smell all around the appliance area for gas. Be sure to smell

next to the floor because some gas is heavier than air and will settle on the floor.

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 fire department.

C. DO NOT use this appliance if any part has been under water. Immediately call a

qualified service technician to inspect the appliance and to replace any part of the
control system and any gas control that has been under water.

OPERATING INSTRUCTIONS

1. STOP! Read the safety information above in this manual.

2. Set the thermostat to the lowest setting.

3. Turn off all electric power to the appliance.

4. his appliance is equipped with an ignition device that automatically lights the burner.
DO NOT try to light the burner by hand.

5. Remove the front jacket panel.

6. Turn the gas control valve (located outside the boiler on the 1½-inch clockwise to
“OFF”. The handle of the valve should be perpendicular to the pipe in the “OFF”
position.

7. Wait five (5) minutes to clear out any gas. Then smell for gas, including near the
floor. If you smell gas, STOP! Follow “B” in the safety information above in this
manual. If you do not smell gas, go to the next step.

1