Figure 10: Wiring Diagram

VII. System Start-up

A.Safe operation and other performance criteria were met with gas manifold and control assembly provided on boiler when boiler underwent tests specified in American National Standard for Gas-Fired Low- Pressure Steam and Hot Water Boilers, ANSI Z21.13.

B.Fill heating system with water and vent air from system. Use the following procedure on a Series Loop System equipped with zone valves. See Figure 3.

1.Close isolation valve in boiler supply piping.

2.Isolate all circuits by closing zone valves or balancing valves.

3.Attach hose to bib cock located just below isolation valve in boiler supply piping. Terminate hose in five gallon bucket at a suitable floor drain or outdoor area).

4.Starting with one circuit, open zone valve.

5.Open bib cock.

6.Open fill valve. Makeup water line should be located directly above isolation valve in boiler supply piping.

7.Allow water to overflow from bucket until discharge from hose is bubble free for 30 seconds.

8.Open zone valve to second zone to be purged, then close first. Repeat this step until all zones have been purged, but always have one zone open. At completion, open all zone valves.

9.Close bib cock, continue filling system until pressure gauge reads 12 psi. Close fill valve.

Note: If makeup water line is equipped with pressure reducing valve, system will automatically fill to 12 psi. Leave globe valve open.

10.Open isolation valve in boiler supply piping.

11.Remove hose from bib cock.

C.Check main burners. See Figure 11. Rear of burner must be in vertical slot in rear of burner tray. Front of burner must be seated on orifice.

13Figure 11: Main Burner Installation

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Burnham 20_PV_I manual VII. System Start-up, Main Burner Installation
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20_PV_I specifications

The Burnham 20_PV_I is a high-efficiency, versatile heating solution designed for residential and commercial applications. Renowned for its performance and reliability, the Burnham 20_PV_I is a notable choice for those seeking an effective way to heat their spaces.

One of the standout features of the Burnham 20_PV_I is its innovative design, which incorporates a range of advanced technologies to maximize thermal efficiency. The boiler operates using a proven cast iron heat exchanger that ensures optimal heat transfer. This not only allows for rapid heating but also contributes to the longevity of the unit. With a heating capacity of 20,000 BTUs, it is well-suited for medium-sized spaces, making it ideal for heating homes or small businesses.

Efficiency is a key attribute of the Burnham 20_PV_I, which boasts an impressive AFUE (Annual Fuel Utilization Efficiency) rating. This high efficiency translates into lower fuel consumption, resulting in reduced energy bills for users. The boiler is designed to operate with various fuel types, accommodating natural gas and propane options, which provides flexibility depending on regional availability and price factors.

Another notable characteristic of the Burnham 20_PV_I is its user-friendly control system. The boiler features an integrated digital control panel that allows users to easily set desired temperatures and monitor system performance. This level of control enhances comfort while also enabling owners to proactively maintain efficiency.

In terms of installation, the Burnham 20_PV_I is designed with convenience in mind. Its compact dimensions allow it to be installed in various locations, including basements and utility rooms, without taking up excessive space. Plus, the unit's lightweight construction facilitates easier handling during the installation process.

Safety is paramount in the design of the Burnham 20_PV_I, which includes multiple safety features such as a high limit temperature control, pressure relief valve, and robust emergency shutoff systems. These features ensure reliable operation and peace of mind for users.

Overall, the Burnham 20_PV_I stands out as a robust, efficient, and user-friendly heating solution. With its advanced technologies, impressive efficiency ratings, and committed focus on safety and reliability, it represents an excellent investment for anyone looking to enhance their heating systems, providing warmth and comfort for years to come.
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