Gas piping, Connecting gas supply piping

5	EG, PEG, EGH GAS-FIRED BOILERS — SERIES 4 — BOILER MANUAL

Gas piping

Connecting gas supply piping

Size gas piping considering:

a.Diameter and length of gas supplying piping.

b.Number of fittings.

c.Maximum gas consumption (including any possible future expansion).

d.Allowable loss in gas pressure from gas meter outlet to boiler. For pressure drops, see ANSI Z223.1. Canadian installations must comply with CAN/CSA B149.1 or .2 Installation Codes.

1.For natural gas:

a)Refer to following tables. To obtain cubic feet per hour, divide the input by 1000.

b)Size for rated boiler input.

c) Inlet gas pressure:	5" W.C. minimum
	13" W.C. maximum

d)Manifold gas pressure: 3¹⁄₂" W.C.

e)Install 100% lock-up gas pressure regulator in supply line if inlet pressure exceeds 13" W.C. Adjust for 13" W.C. maximum.

2. For propane gas:

a) Inlet gas pressure:	11" W.C. minimum
	13" W.C. maximum

b)Manifold gas pressure: 10" WC.

c)Gas pressure regulator provided by gas supplier must be adjusted for maximum pressure of 13" W.C.

d)Contact gas supplier to size pipes, tanks and regulator.

3.Remove knock-out disc from jacket panel which gas supply is to be piped.

4.Follow good piping practices.

5.Pipe joint compound (pipe dope) must be resistant to corrosive action of liquified petroleum gases. Apply sparingly only to make threads of pipe joints.

6.Install drip leg at inlet of gas connection to boiler. Where local utility requires, extend drip leg to floor.

7.Install ground joint union when required for servicing. See Figure 22.

8.Install manual shut-off valve outside boiler jacket as shown in Figure 22 when required by local codes.

9.Support piping by hangers, not by boiler or its accessories.

10.In Canada only, the manual main shut off valve (when used) must be identified by the installer.

11.Purge all air from piping.

12.Before placing boiler in operation, check boiler and its gas connection for leaks.

Do not check for gas leaks with an open flame - use bubble test. Failure to do so can cause severe personal injury, death or substantial property damage.

a)Close manual main shut-off valve during any pressure testing at less than 13 inches water column.

b)Disconnect boiler and gas valve from gas supply piping during any pressure test greater than 13 inches water column.

Figure 22 Gas supply piping

14	Part Number 550-110-639/0703

EG specifications

The Weil-McLain EG Series is a notable line of cast iron, steam, and hot water boilers designed primarily for commercial and residential heating applications. Known for its robustness and efficiency, the EG boiler series has become a preferred choice for many heating professionals.

One of the main features of the Weil-McLain EG series is its durable cast iron construction. This material not only contributes to the longevity of the boiler but also ensures excellent heat retention and uniform heating. The boiler's heat exchanger is optimized to maximize thermal efficiency, delivering reliable and effective heating performance across various applications.

Another key aspect of the EG series is its heating capacity. Available in a range of sizes and outputs, the EG boiler provides flexibility, making it suitable for different heating needs. Whether it’s a small residential installation or a larger commercial system, the EG series offers models that can be tailored to meet specific load requirements.

Advanced technology is integrated into the Weil-McLain EG series to enhance efficiency and ease of use. One notable feature is its ability to operate with both gas and oil fuel types, enabling users to choose the most economical and accessible option for their needs. Additionally, the EG boilers come equipped with a reliable and intuitive control system that simplifies operation and maintenance tasks, allowing users to monitor performance easily.

The EG series also incorporates safety features, such as pressure relief valves and advanced combustion controls, which ensure safe and efficient operation. This attention to safety is essential in protecting both the system and the inhabitants of the building it serves.

Maintenance of the EG boiler is designed to be straightforward, with serviceability being a prominent focus in its design. The boiler's modular components can be accessed easily, significantly reducing downtime for repairs and maintenance.

In conclusion, the Weil-McLain EG series stands out for its reliable performance, efficiency, versatility, and robust construction. Its combination of advanced technology and user-friendly features makes it a leading choice for those seeking a dependable heating solution. Whether for residential or commercial applications, the EG series is engineered to deliver consistent heating while maximizing comfort and minimizing operating costs.