Electrical Wiring

!WARNING

Electrical shock hazard. Turn OFF electrical power supply at service panel before making electrical connections. Failure to do so could result in death or serious injury.

Electrically bond boiler to ground in accordance with requirements of authority having jurisdiction. Refer to:

•USA- National Electrical Code, ANSI/NFPA 70.

•Canada - Canadian Electrical Code, Part I, CSA C22.1: Safety Standard for Electrical Installations.

Electric Power Supply

Prior to making any line Voltage connections, turn OFf electrical power at fuse box.

1.Run separate 115 Volt circuit from separate over current protection device in electrical service entrance panel. This should be 15 ampere circuit.

2.See Figure 20, Page 31 for diagram showing service switch junction box and power supply connection points.

3.Locate service switch in vicinity of boiler. Verify it is turned OFF during service or maintenance.

•Connect black (hot) lead from power supply to black wire labeled L 120 VAC.

•Connect white (neutral) lead from power supply to white wire labeled N 120 VAC.

•Connect green (ground) lead from power supply to green wire labeled G 120 VAC.

4.Run 14 gauge or heavier copper wire from boiler to grounded connection in service panel or properly driven and electrically grounded ground rod.

Thermostat Installation

•Thermostat location has important effect on operation of boiler system.

•Follow instructions included with your thermostat.

•Locate thermostat about ﬁve feet above ﬂoor on inside wall.

•Mount directly on wall or on vertical mounted outlet box.

•It should be sensing average room temperature.

Set heat anticipator (where applicable) at 0.7 amps. Connect 24 Volt thermostat leads to two(2) yellow wires located in junction box, located on outer jacket of boiler.

See Figure 20, Page 31 for junction box and thermostat ﬁeld wiring connections.

Connect Circulator Pump Wiring

See Figure 20, Page 31 for circulator pump ﬁeld wiring con- nections.

Supplied 5 foot wiring harness with ﬂexible metal conduit for connection from circulator pump to junction box.

If two 120 Volt circulator wire terminals inside junction box are not used, leave two wire nuts to prevent short circuit.

NOTICE

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

Things to Avoid when Locating Thermostats

DEAD SPOTS:

	Corners and alcoves	Behind doors
	COLD SPOTS:	HOT SPOTS:
	Concealed pipes or ducts	Concealed pipes
	Concealed pipes or ducts	Fireplace
		Fireplace
	Stairwells - drafts	TV sets
	Stairwells - drafts	Radios
		Radios
	Unheated rooms on	Lamps
	Unheated rooms on	Direct sunlight
	other side of wall	Direct sunlight
	other side of wall	Kitchens
		Kitchens

GWB9-050IH-2, GWB9-100IH-2, GWB9-075IH-2, Gas-Fired Hot Water Boiler specifications

Lennox International Inc. is a prominent player in the HVAC industry, renowned for its innovative solutions and high-efficiency products. Among its standout offerings is the GWB8 Gas-Fired Hot Water Boiler, available in various models including GWB8-262E-2, GWB8-245E-2, GWB8-280E-2, and GWB8-299E-2. These units are designed to provide reliable and efficient heating solutions for residential applications.

One of the key features of the GWB8 series is its energy-efficient operation. These boilers are designed to achieve an AFUE (Annual Fuel Utilization Efficiency) rating of up to 84%, allowing homeowners to save on energy costs while reducing their environmental footprint. The product utilizes a cast-iron heat exchanger, which promotes optimal heat retention and distribution, ensuring consistent performance throughout the heating season.

The GWB8 series incorporates advanced technologies to enhance comfort and efficiency. A significant innovation is the use of a power venter system that facilitates venting through the sidewall of the home, providing installation flexibility while maintaining safety standards. Additionally, the boilers are equipped with a Honeywell integrated control for precise temperature management and modulating gas valve technology, which adjusts the gas flow to match the heating demand, further optimizing fuel consumption.

Another defining characteristic of the GWB8 models is their durable construction. Designed to withstand the rigors of heating applications, these models feature a robust, powder-painted steel cabinet that helps prevent rusting and corrosion. The access doors are insulated, contributing to overall efficiency while allowing easy maintenance and serviceability.

The GWB8 series is also designed with homeowner comfort in mind. The quiet operation of these boilers ensures that they blend into the living environment without disruptive noise, making them an ideal choice for residential settings. The models are compatible with various heating systems, including hydronic heating, making them versatile and reliable.

Overall, Lennox's GWB8 Gas-Fired Hot Water Boiler series is an excellent choice for homeowners seeking efficient, durable, and reliable heating solutions. With a combination of advanced technologies, energy-efficient performance, and practical features, these boilers set a high standard for residential heating systems in today's market.