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RT-SVX20A-E444
Hot water coil
(Down flow units only)
In order to prevent water to freeze
up in the coil during unoccupied
period or shutdown limited period,
a thermostat opens when there is a
risk of freeze-up. The services of a
water treatment specialist are
recommended if water used can
cause scaling deposits or erosion.
Insulate all the water piping likely to
be exposed to freezing
temperatures in order to avoid
freeze up of the coil and heat
losses. The water distribution
network must be fitted with vents in
places where air is likely to be
trapped.
The hot water coil is factory
mounted in the discharge section.
Two holes are provided to connect
the hot water coil. They are located
at the base of the unit. Remove the
central panel to access the coil,
using an 8 mm wrench (the bolts
are located on the bottom part of
the panels). The tubes for entering
and leaving water are equipped
with a threaded female connector.
Water connection inlet/outlet:
1 ¼" ISO R7.
Installation and connection
In order to prevent water to freeze
up in the coil during unoccupied
period or shutdown limited period,
it is recommended to use ethylene
glycol. The services of a water
treatment specialist are
recommended if water used can
cause scaling deposits or erosion.
Insulate all the water piping likely to
be exposed to freezing
temperatures in order to avoid
freeze up of the coil and heat
losses. The water distribution
network must be fitted with vents in
places where air is likely to be
trapped.
Table 43 - Ethylene glycol percentage
Ethylene glycol
percentage
Freezing point
(%) (°C)
10 -4
20 -10
Figure 26 - Hot water coil connections