zozen boiler
Home Service FAQs FAQ of gas-fired(oil-fired) boilers What aspects are included in the system commissioning before the operation of oil-fired boiler?

What aspects are included in the system commissioning before the operation of oil-fired boiler?

21 Aug 2020

Before the operation of oil-fired boiler, we should effectively adjust the heating system to make it conform to the actual working conditions. Moreover, what are the specific operating steps when adjusting the oil-fired boiler?

The first step is to add water to the oil-fired boiler. First open the water feeding valve, wait boiler's water level rising to the normal level, and close the water feeding valve.

It is not only the oil-fired boiler itself that need to be added water, but also the system. Open the system water feeding valve to add water, then observe the automatic exhausting conditions until the exhausting valve does not work, and finally close the water feeding valve. If the pressure of tap water does not meet the standards, a pump can be used to add water.

After the oil-fired boiler and system complete the water feeding, the low temperature operation of water pump can be set via the control box. However, before starting the pump, open all the valves except the water feeding valve. Meanwhile, open the open/close device, hydraulic tube and exhausting valve to exhaust the air and observe boiler's water level at the same time.

If the water level rises significantly, the resistance control valve should be turned down properly until the water level stops rising; if the water level drops, it indicates that the system is not be added enough water, so keep adding water to the oil-fired boiler until the water level stops dropping. After the water level of oil-fired boiler is adjusted to the normal, shut off the water pump and check whether the parts like open/close device and back-pressure valve are normal.

The checking method is also very simple to observe whether the water level of oil-fired boiler is rising. If the water level rises, it indicates the valves are not fully closed. There will be the sound of water flow when putting the ear closely on the open/close device and back-pressure valve. If there is something wrong with the open/close device, check the valve. If there is something blocked, remove it as soon as possible.

Related FAQs View More
Related news View More
  • ZOZEN Boiler to Showcase at Heatpower Expo 2025 in Moscow, Russia
    From October 21 to 23, the Heatpower Expo, Russia’s premier industrial boiler and heat exchange exhibition, will be held at the Crocus International Expo Center. As a benchmark event in the industrial boiler and heat exchange equipment sector in Russia, the expo serves as both a window into industry trends and a high-energy platform for fostering practical cooperation. ZOZEN Boiler’s Russian-speaking sales team will participate with its core boiler solutions, demonstrating clean, eff...
    07 Oct 2025
  • ZOZEN Boiler Supports Green Development of Enterprises in Zhejiang with Low Nitrogen Emission Advantages
    Zhejiang Province has always prioritized ecological and environmental protection as a fundamental aspect of its development, continuously promoting energy conservation, emission reduction, and green transformation in the industrial sector. In this process, ZOZEN Boiler has established itself as a reliable partner for numerous enterprises in Zhejiang by leveraging its long-standing expertise in low nitrogen emission technology. Its service cases span various fields, including chemicals, energy, t...
    30 Sep 2025
  • Specialty Lubricants Company Installs ZOZEN Boiler 4 Million Kcal Gas-Fired Thermal Oil Heater
    Recently, the 4 million kcal YQW series gas-fired thermal oil boiler introduced through the cooperation between Hangzhou Derunbao Oil Co., Ltd. and ZOZEN Boiler has been installed and is currently in the commissioning stage. Centered on the design concepts of high efficiency, intelligence, and safety, this project has had a positive impact on energy saving, consumption reduction, and optimization of plant space layout. Strong Partnership Between Hangzhou Derunbao and ZOZEN Boiler   Ent...
    23 Sep 2025

Find the Right Boiler For You

Name *

Email *

WhatsApp/WeChat

Products

Power/Capacity