10
Domestic Piping
1. Disconnect the cold inlet adapter/union
from the thermostatic mixing valve.
2. Use needle-nose pliers to remove the
plastic check valve assembly from the
adapter.
3. Solder the U-Tube Assembly onto the
adapter. See Fig. 1.
4. Once the adapter has sufficiently
cooled, re-insert the check valve assem-
bly making sure of orientation and
reconnect onto the mixing valve.
5. Solder the remaining end of the U-tube
to the adapter on the cold inlet piping
If the installation requires domestic hot
water for a commercial dishwasher, the
installer may insert a tee connection
between the appliance and the mixing
valve to provide high temperature domestic
hot water.
The installer must reference
local plumbing codes to ensure if this type
of application is permissible.
The thermostatic mixing valve MUST be
installed and utilized on the MODU-
LATING DELTA. Removal of the ther-
mostatic mixing valve will result in
severe personal injury or death.
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. 2 page 11.
-
The drain valve should be positioned
close to the floor to aid in the siphon
action required to drain the inner tank.
Multiple Appliances Installation
For applications using multiple appliances the
domestic piping should be piped using a bal-
anced manifold arrangement.
The installer should remove the thermostatic
mixing valve from the appliances 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 thermostat mixing valve manufacturer
specification and installation instructions for
more details. Reference Fig. 4, page 12 for pip-
ing 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. 5 page 13) in the domestic piping.
The installer must:
1. Relocate the thermostatic mixing valve
from the MODULATING DELTA to
the outlet of the storage tank.
2. Provide recirculation from the storage
tank back to the MODULATING
DELTA using a bronze type circulator.
Recommended flow rate is 5 to 10 gpm
maximum.
Recirculation from the storage tank can
be accomplished through the drain
connection if a 3rd tapping is unavail-
able on the storage tank. The recircula-
tion circulator must be controlled by an
aquastat.
NOTE
CAUTION
DANGER
Co
ld
Ho
t
U-Tube Assembly
Adapter
Check Valve
Mixed
Fig. 1: Mixing Valve Assembly
