Install Instructions

15
4.0 Boiler Piping
4.4 Low Water Cutoff Device
- The PRESTIGE Solo is equipped with a fac-
tory installed pressure sensor type Low Water
Cut Off device.
- The minimum operating system pressure
allowable with this device is 10 psig.
- Check local codes if a Low Water Cutoff
Device is required. If so, determine if this
device meets the requirements of the local
codes.
The PRESTIGE Solo control system also
senses the water temperatures entering
and exiting the heat exchanger to pro-
vide protection against low water condi-
tions. Where local codes and jurisdic-
tion do not accept a pressure device for
low water protection, the jurisdictions
may accept these PRESTIGE Solo inte-
gral control functions as a means of pro-
viding low water protection.
4.5 Additional Limit Control
If a separate LWCO device is required by the
local jurisdiction or when the boiler is installed
above the system piping, the following guide-
lines must be followed:
- The LWCO device must be designed
for water installations, electrode probe-
type is recommended.
- The LWCO device must be installed in
a tee connection on the boiler supply
piping above the boiler.
- Wiring of the LWCO device to the PRES-
TIGE Solo is done directly onto the low
voltage terminal strip, reference Fig. 19
page 31 for available terminals for an
external limit (manual or auto reset).
If the installation is to comply with ASME or
Canadian requirements, an additional high
temperature limit may be needed. Consult
local code requirements to determine compli-
ance. The limit should be installed as follows:
- Install the limit in the boiler supply pip-
ing between the boiler and any isolation
valve.
NOTICE
Fig. 5: Pressure Relief Valve and Boiler Drain Valve Installation