AERCO KC Series Equipped with C-More version 3.04 - Manual (Page 13)

INSTALLATION
2-3
Shut-off valves and union conections must be
installed in the inlet and outlet lines for main-
tenance. The use of dielectric unions is recom-
mended. Install the piping and accessories as
per the following drawings, located in Appendix F
of this manual.
• SD-A-424 for single units
• SD-A-425 for multiple units
• SD-A-432 for single units with a stratified
tank
• SD-A-434 for multiple units with a stratified
storage tank
NOTE:
All piping must be arranged so that it does
not interfere with removal of any cover,
inhibit service or maintenance, or prevent
access between the unit and walls, or
another unit.
Figure 2.3
Inlet and Outlet Location
2.3.3 TEST HOSE BIB
A Test Hose Bib connection, upstream of the
shut off valve on the hot water outlet, is required
for startup and testing. It should be a minimum
of 3/4". It cannot be omitted (See Fig. 2.4a)
Figure 2.4a
Hose Bib Location
NOTE:
The maximum working pressure for
installations within the Province of Alberta is
87 psig. Therefore, a pressure & temperature
relief valve with a setting of 75 psig/210°F is
supplied with Alberta shipments. See Drawing
AP-A-863 in Appendix E.
2.3.4 PRESSURE/TEMPERATURE
RELIEF & DRAIN VALVE INSTALLATION
An ASME rated Pressure/Temperature Relief
Valve is supplied with each unit. With the
exception of Alberta installations (see above
Note), the valve setpoint is 150 psig/210°F.
Install the relief valve as shown in Figure 2.5. A
suitable pipe compound should be used on the
threaded connections. Any excess should be
wiped off to avoid getting any into the valve
body. The relief valve should be pipied to within
12 inches of the floor to prevent injury in the
event of a discharge. The relief piping must be
full size, 1-1/2”, without reduction. No valves,
restrictions, or other blockages are allowed in
the discharge line. In multiple unit installations
the discharge lines must not be manifolded
together. Each must be individually run to a
suitable discharge location.
A 1” drain valve assembly is furnished with each
unit. The assembly should be installed as shown
in Figure 2.4b. The drain should be hard piped to
a suitable drain.