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16
Emergency hCore
®
Heat Transfer Technology Drain
The hCore
®
Heat Transfer Technology (closed loop heat transfer section) is constructed
of corrosion-resistant stainless steel, so it may be drained frequently. However, frequent
draining of any piping constructed of carbon steel, including the header piping, promotes
corrosion inside the pipes. Therefore, if frequent draining is required, ensure that the
header and system piping are constructed of corrosion-resistant materials before draining
regularly.
Draining is acceptable as an emergency method of freeze protection if the hCore
®
Heat
Transfer Technology is not protected by a glycol solution. If frequent draining is required
for freeze protection, an automatic drain valve and vacuum breaker are recommended to
drain the hCore
®
Heat Transfer Technology if flow stops or the fluid temperature drops
below 45°F (7.2°C) when the ambient temperature is below freezing. Further protection
against hCore® Heat Transfer Technology freeze-up is possible with the installation of an
alarm to alert personnel when the temperature of the fluid leaving the section falls below
45ºF (7.2°C). For more information, see “Detailed Component Maintenance Procedures”
on
page 20
.
Contact your local BAC Representative for guidelines on the installation of an emergency
hCore
®
Heat Transfer Technology drain system.
Spray Water Basin Protection
It is important to protect the basin and internal piping. The spray water basin could
freeze when the unit is shutdown and be exposed to subfreezing ambient temperatures.
When optional basin heaters are not included, the spray water basin will drain after the
temperature remains below 35°F (1.7°C) for one hour.
•
Heat Tracing:
Heat trace the make-up water lines and the drains with electrical heater
tape.
•
Basin Heaters (Optional):
For buildings that benefit from keeping water in the spray
water basin, basin heaters can be inclued in the spray water basin for freeze protection
duing subfrezing ambient temperature.
Contact your local BAC Representative for more details.