Slant/Fin VSL-160C Part A - Manuel (Page 21)

21
7.4 - Domestic hot
and cold water
(only for 160-C
model)
160-C boiler, offers resistance to
the passage of domestic water (see
graph fl ow/pressure of Figure 7-5).
The installer or the engineer must
take account of this in order to ensure
the correct domestic water fl ow to the
utilities.
CAUTION!!!
If the domestic
water hardness is greater
than 9 gr/gal (150 mg/l) we
recommend installing a water
softener with fi lter. Failure to
comply with this requirement
may compromise the
functionality of the unit and
void its warranty.

Figure 11 illustrates the positioning
of the domestic hot and cold water
pipes.

For servicing purposes, install an
isolation valve upstream from the
cold water inlet.

To correctly set the domestic water
fl ow, install an adjustable fl ow
restrictor upstream the cold water
inlet (see Figure 7-6 item “17”)

160-C boiler can be used as heat
only boiler (see Section 7-3).
Anti-scald mixing valve: Field
supplied. An anti-scald mixing valve is
recommended (see Figure 7-6). It is
recommended also when an indirect
water heater is present.
WARNING!!!
Install an anti
scald mixing valve downstream
domestic hot water piping.
Failure to comply with this
provision can result in scalding
of individuals and animals
causing, severe personal injury
or death!
7 - INSTALLATION - Water connections
Figure 7-3 Available Head for heating circuit for models “160-C”
Figure 7-4 Internal Boiler Head Loss for model “160-B”
Figure 7-5 Domestic Water Coil Head Loss for model “160-C”