eCO Premium™ - Installation & Maintenance
37
FläktGroup DC_9604GB_20190327_R6
Specifications are subject to alteration without notice
18. MAINTENANCE FOR HOT WATER POST-HEATER
CONNECTIONS
The pipe couplings of the heater must not be forced to carry the
dead weight of the external piping system. The pipes must be
relieved of the expansion forces exerted by the piping system.
The connections must be protected against impacts, external
loads and mechanical stress. Any mechanical loads and impacts
may damage the manifold header.
PROTECTION AGAINST FROST EXPANSION
When there is a risk of freezing and consequent tube damage,
one of the two following measures must be taken:
The coil must be filled with a suitable antifreeze medium. The
liquid volume of the coil is stated on the rating plate which is
located on the side of the coil with the connections.
All the water must be drained from the pipes and the coil. The
plugs on the coil should not be fitted until the system is again re-
filled with water. Compressed air should be blown into the coil to
ensure it is properly emptied from water.
HIGH TEMPERATURES
On installation and maintenance of the coil where the liquid medi-
um is water and the water temperature can exceed 100°C, great
care must be exercised when opening vent valves and stop-
cocks in the system. Serious personal injury can be caused by
hot liquid or steam discharge.
Flakt Woods is not responsible for the connection of the heater
to the heating system or damage that can occur due to incor-
rect planning, installation or maintenance of this system. Piping,
valves, etc. must be appropriately dimensioned with regard to
pressure drop and function and not based on the coil connection
dimension.
FILLING, VENTING AND DRAINING
The water coil collection pipes are equipped with an air venting
nipple and a draining nipple. The air must be properly vented from
the system to ensure good functioning. To ensure that the heater
is completely drained, compressed air should be blown through
the tubes of the heater.
Heaters for heat recovery are completely drainable but in this
case antifreeze must always be used. Recommended way of fill-
ing heaters in recovery systems is by using vacuum.
NOTE!
Any liquids potentially harmful to the environment must be col-
lected in suitable containers and sent for disposal or recycling.
The heater must not be lifted before it has been emptied of all
liquid.
MAINTENANCE
Regular inspections of the mountings should be made to make
sure no load bearing screws or threads are damaged. The fin
structure should be checked that it is clean and undamaged.
CLEANING
Any coating of dust on the heater surfaces will hinder the pas-
sage of air and slow down the transfer of heat. Therefore, the
coils must be kept clean, and any one of the following methods
(or a combination of several) is appropriate:
• Vacuum cleaning.
• Cleaning with compressed air.
• Cleaning with steam.
• Flushing or rinsing with water. With grease covered hot
surfaces first spray the entire heater with environmentally
friendly solvent at a low pressure. High pressure wash with
water after 10-12 minutes.
Cleaning should be done against the normal direction of air flow.
NOTE!
It is important to keep the nozzle square to the fin surface and no
closer than 150mm to prevent damage to the fins.
MAINTENANCE FOR HOT WATER POST-HEATER CONNECTIONS
Fins that have been deformed can be straightened with a fin
comb. The finned-tube body must not contain any traces of sol-
vent after cleaning as remaining solvent will bind new dust. After
cleaning, remove all fallen dust before starting the fan.
90°
150 mm
Содержание eCO Premium
Страница 1: ...INSTALLATION AND MAINTENANCE MANUAL eCO PREMIUM...
Страница 47: ......
