What should the water temp be on a boiler?

Setting the boiler temperature As a rule, setting your heating control to 75 degrees should be sufficient to give you a perfectly warm house, while also allowing your boiler to run as economically as possible. Once this is set, you shouldn’t need to adjust it.

Why do we need to preheat water before entering the boiler?

Preheating the feedwater reduces the irreversibilities involved in steam generation and therefore improves the thermodynamic efficiency of the system. This reduces plant operating costs and also helps to avoid thermal shock to the boiler metal when the feedwater is introduced back into the steam cycle.

What is the typical return water temperature for a gas fired boiler?

What is the minimum desired return water temperature for a gas fired boiler? At least 140°F returning to the boiler.

What is the minimum temperature of feed water in economiser?

between 30° and 100° C
The feedwater, normally at temperatures between 30° and 100° C, represents a further cooling medium for the exhaust gases and provides the potential for the extra heat utilization. This is shown in Figure 31.1.

How do I adjust the water temperature on my combi boiler?

Adjusting the temperature of water from a combi boiler You will have two separate controls: tap and radiator. Adjusting one should not affect the other. Turn the temperature of the tap control down a touch, then perform the thermometer test again. You should be able to do this straight away.

What temperature should heating be set at?

It maintains a set temperature, nothing more. But this all boils down to the following: the perfect temperature for your heating is somewhere in between 18 and 22 degrees depending on preference – with the lowest number possible being better for your wallet.

What is pre heat on boiler?

‘Pre-heat’ is a function that is designed to provide you with instant hot water when required. It works by infrequently heating the plate heat exchanger so that when hot water is requested it is already heated.

What temp should be maintained of feed water and why?

Inadequate Heating of Feedwater Most feedwater tanks are equipped with a steam sparger, which heats the tank with steam from the boiler. The temperature of the feedwater tank should be maintained between 185 and 195°F (85 and 90°C) to reduce the amount of oxygen in the water.

What is water return temperature?

The return temperature is the temperature of the water in the pipe system after heat has been released into the greenhouse. The difference between inlet temperature and return temperature of the water occurs during transport through the heating system.

What temperature should a condensing boiler be set at?

Your condensing boiler should be set to generate water at a flow temperature of at least 60C (hot water tanks should store water at this temperature). This is because this is the temperature that kills legionella bacteria.

What is the pH value of water permissible for boiler?

3. What is the pH value of water permissible for boiler? Explanation: The pH value of water used in the boiler is slightly greater than 7 for most of the commonly used boiler.

Why do I need to pretreat my boiler?

– Having pretreatment for a boiler is necessary to keeping your plant operating safely and efficiently. Installing a reverse osmosis system in place will lower operating costs of the boiler, as well as reduce the blow down times, formation of scale and corrosion.

What are the basic boiler principles?

Basic Boiler Principles HOT WELL DEAERATOR EXTERNAL TREATMENT MAKE UP RETURNED CONDENSATE WATER AND HEAT FEEDWATER WATER AND SOLIDS SATURATED STEAM EVAPORATED WATER Continuous blowdown to remove dissolved solids in boiler water Intermittent blowdown to remove suspended solids in boiler water

How does temperature affect boiler feed water quality?

Low temperatures can affect the boiler feed water quality as well, as it will result in higher levels of dissolved gases, oxygen and carbon dioxide, that will corrode the internal metal surfaces the water comes in contact with.

Why choose reverse osmosis for boiler pretreatment?

Having a reverse osmosis system as pretreatment can significantly lower costs due to poor maintenance of boiler systems. Reverse osmosis systems reduce the dissolved solids that lead to scaling.