Domestic Drain Valve; Multiple Units Installation; Storage Tank Application - Delta Performance PG-25 Installation And Maintenance Manual

Domestic Piping
3. Solder the U-Tube Assembly onto the
adapter. (See Fig. 5)
4. Once the adapter has sufficiently
cooled, re-insert the check valve assem-
bly making sure of orientation and
reconnect onto the mixing valve.
If the installation of the PERFORMANCE
requires domestic hot water for a commer-
cial dishwasher, the installer may insert a
tee connection between the unit and the
mixing valve to provide 140ºF domestic
hot water. The installer must reference
local plumbing codes to ensure if this type
of application is permissible.
DANGER
The thermostatic mixing valve MUST be
installed and utilized on the PERFOR-
MANCE. Removal of the thermostatic
mixing valve will result in severe person-
al injury or death.
CAUTION
The manual valve on the U-Tube assem-
bly must remain in the full open position
for proper operation of the thermostatic
mixing valve.

Domestic Drain Valve

- The installer must install a drain valve
and drain leg as shown in Fig. 6 page 17
or Fig. 7 page 18.
- The drain valve should be positioned
close to the floor to aid in the siphon
action required to drain the inner tank.

Multiple Units Installation

For applications using multiple units the
domestic piping should be piped using a bal-
anced manifold arrangement.
The installer should remove the thermostatic
mixing valve from the units and install a single
thermostatic mixing valve at the outlet of the
hot water manifold. The thermostatic mixing
valve should be sized according to the required
flow rate and pressure drop. Refer to the ther-
mostat mixing valve manufacturer specifica-
tion and installation instructions for more
details.
Reference Fig. 8, page 18 for piping diagram.

Storage Tank Application

For applications requiring large volumes of
domestic hot water in a relative short period,
the installer may include a storage type tank
(see Fig. 9 page 19) in the domestic piping.
The installer must:
1. Relocate the thermostatic mixing valve
from the PERFORMANCE to the out-
let of the storage tank.
2. Provide recirculation from the storage
tank back to the PERFORMANCE
using a
Maximum recommended flow rate is 5
to 10 gpm.
NOTE
This can be accomplished through the
drain connection if a 3rd tapping is
unavailable and the circulator should be
controlled by an aquastat.
U-Tube Assembly
Fig. 5: Mixing Valve Assembly
16
bronze type circulator.
Check Valve
Adapter
Mixed