Ensbury LT 70 - 580
We reserve the right to make changes to dimensions and construction
8
edition 12.2020
Hamworthy Heating Limited – Dorset BH17 ONF
Setting up a filtration system
A filtration system on the back of the boiler is recommended in order to remove suspended particles from the unit.
Choice of burner / boiler
We recommend adopting modulating burners to avoid thermal shock in operation.
Hydraulic
Set up an effective degasser as close as possible to the boiler outlet to evacuate the air from the networks
introduced during the filling and the addition of water in order to maintain a good convection coefficient.
Add an additional expansion vessel if the characteristics of the pressure maintenance unit do not allow the
pressure variations to be limited to 0.5 bar in order to limit the variations in hydraulic pressure.
No minimum flow rates recommended for boilers equipped with a Navistem B2000 or equivalent system to control
the minimum flow temperature. In the opposite case, respect a flow rate of P / 45, in accordance with the General
Conditions of Sale (P = Power in th / h provided at time t.).
Exploitation
The frequency of cold starts should be as low as possible; during these periods, the flue gas temperature can be
low and cause condensation that is detrimental to the life of the boiler; it is recommended not to exceed a cold
start per week.
During a cold start, the heat emitters of the installation will be irrigated when the set temperature is reached; the
temperature rise of the installation will be carried out at minimum power.
Do not shut off the burner at full load to avoid temperature shock.
Do not hesitate to add buffer volumes to the plant's hydraulic system to avoid short operating cycles, especially
when the boiler is protected by an isolation plate heat exchanger. Regarding the regulation of the installation, we
recommend burner modulation parameters (PID) sufficiently slow to ensure stability and low temperature
variations, start / stop differentials / hysteresis must be reasonable in order to leave a range of operation sufficient
for the burner and to ensure its modulation (value +/- 4 ° C). All strategies must allow the burner to be started up
for an average operating time of 30 minutes.
The temperature variations of the boiler must be as low as possible to ensure the highest service life.
The first heating must allow the evacuation of moisture from concrete doors, it is necessary to avoid any heat
shock and adopt a rise in temperature as slow as possible.
Do not hesitate to adopt the burner's burner maintenance accessories to minimize structural vibration of the
burner assembly.
Unit monitoring
If the recommendations listed above (new installation or renovation) have been followed, the unit monitoring is
limited to:
- Checking the amount of make-up water (fill water make-up water volume < 3 times the
unit volume)
- Checking the pH level (stable or slightly increasing)
- Checking the total hardness (stable or slightly decreasing)
We recommend monitoring these parameters two to three times a year. Note: Monitoring the quantity of make-up
water is critical to the long life of the unit.
If any of these parameters deviates from the above recommendations, refer to a water treatment specialist to
correct the problem.
Setting up a plate exchanger
If the recommendations listed above cannot be met, you can set up a plate exchanger to separate the primary
system from the secondary system, which protects the boiler from undesirable effects.
Summary of Contents for Ensbury LT 70
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