IF IMPROPERLY INSTALLED, A HAZARDOUS CONDITION, SUCH AS AN EXPLOSION OR CARBON MONOXIDE POISONING, COULD RESULT. 8 VENT DAMPER OPERATION For safe, efficient operation, the vent damper and all flue-product-carrying areas of the appliance must be checked annually, with particular attention given to deterioration from corrosion or other sources. Check vent damper operation as follows: 1. When the boiler is off, check that the vent damper position indicator points to the closed position, below. DAMP

WARNING: Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Refer to the user’s information manual provided with this boiler. Installation and service must be performed by a qualified installer, service agency or the gas supplier. FOR YOUR SAFETY 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 supplie

Yellow flame indicates clogging of air openings. Lifting or blowing flame indicates high gas pressure. Low flame indicates low gas pressure. Fig. #8144 MAIN BURNER FLAME NOTE: Modulating burner flame varies in height from approximately 1/4" at low fire to approximately 4" in high fire. Fig. #8964 PILOT BURNER FLAME (STANDING PILOT UNITS) INSPECTION SCHEDULE To be performed the first and third month after initial start up and then on an annual basis. If problems are found, refer to Troubleshootin

4 2) When the boiler is installed in a confined space such as a utility room or closet (Models 0030,0042 and 0066 only), where all air is supplied from inside the building, the boiler room must be provided with two openings, each one having a minimum net free area, in square inches as follows: Model Sq. In. of Free Area 0030, 0042 & 0066 100 One opening shall be within 12" of the top, and the other opening within 12" of the floor. If additional gas appliances are installed in the same space, the

Replaces: 6-01-9. OPERATING AN. INSTALLATIO. INSTRUCTION. Model. 0030B, 0042B, 0066B, 0090. 0135B, 0180. Type . RESIDENTIAL BOILER. FOR YOUR SAFET. Do not store or use gasoline or other flammable vapors and liquids or other combustible material. in the vicinity of this or any other appliance. To do so may result in an explosion or fire. WARNING: Improper installation, adjustment, alteration, service or maintenance can caus. property damage, personal injury or loss of life. Refer to the user's in

To do so may result in an explosion or fire. WARNING: Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Refer to this manual. Installation and service must be performed by a qualified installer, service agency or the gas supplier. FOR YOUR SAFETY 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 suppli

To be used with storage tank systems. TYPE WH3 WITH 2-STAGE CONTROLS Models 0181-4001 Hot water supply heater with low-high fire for 2-stage control. Available with integrally mounted pump, factory mounted and wired for models 01811826. To be used with storage tank systems. TYPE NH INSTANT-PAK Models 0514-1826 Tankless instantaneous direct fired hot water supply heater with 110°-170°F gas modulation, factory mounted bronze body or cast iron bronze fitted pump and flow switch. 3 ! ! General Safet

#2223.2e 21 WIRING DIAGRAM: Standing Pilot With Low Water Cut-off Device Note: Low water cut-off (LWCO) and system switch supplied by others. Fig. # 2223.1e WIRING DIAGRAM: IID Units With Low Water Cut-off Device Note: Low water cut-off (LWCO) and system switch supplied by others. Fig. # 2357E 22 4. SERVICING PROCEDURES CIRCULATOR GENERAL LOCATION OF CONTROLS CONTROL BOX COMPONENT LOCATIONS MODELS 135 & 180 2-Stage Controller Temperature (Auto Ignition Only) Sensor Fast- Response Relay Ignition

Similar type vent dampers made by other manufacturers, and design certified by a nationally-recognized testing agency, under the ANSI Z21.66 standards, may also be used. Follow the installation instructions furnished with the vent damper package. The plug-in connector can also be used with power venters. Refer to the specific installation instructions supplied by the power vent manufacturer. SPECIFICATIONS AND DIMENSIONS Fig. #8978.1 3 3. INSTALLATION PROCEDURES CODE REQUIREMENTS Installation mu

Immediately call your gas supplier from a neighbor's phone. Follow the gas , service agency or This manual should be maintained in legible condition and kept adjacent to the heater or in another safe place for Raytherm™ Residential Boilers CATALOG NO. 2100.50AA Effective: 12-26-07 Replaces: 01-31-07 P/N 240488 Rev. 28 2 CONTENTS WARNINGS Pay Attention to These Terms RECEIVING EQUIPMENT GENERAL SPECIFICATIONS INSTALLATION Code Requirements Mounting Base Clearance Requirements Combustion/Ventilati