Reversing Cold/Hot Water Flow & Return Connections; Reversing Cold/Hot Water Flow & Return Piping Connectors - Watts AERCO MLX EXT 321 Installation, Operation & Maintenance Manual

Modulex Light Commericial Series
CHAPTER 4: Installation Instructions
Reversing Cold/Hot Water Flow & Return Connections
Change of Water Flow and Return connections from RIGHT hand to LEFT hand requires
reversing connectors, moving the Flow and Return Temperture Sensors to other end, and
exchanging positions of the Boiler Sensor KF and Automatic Air Vent.
WARNING!
Ensure that the gaskets for ALL connections are reversed along with the connectors
themselves.
4.8.3.1 Reversing Cold/Hot Water Flow & Return Piping Connectors
Refer to Figure 4-12 and reverse the connectors and end caps on Supply, Flow, and Return
pipes. Ensure that all gaskets are also reversed.
Move Boiler Sensor
KF (sensor only,
not the thermowell)
to the opposite side
and install into
thermowell under
tha air vent. See
Figure 4-14.
Move supply
connectors
(and
gaskets) to
other end of
Flow/Return
pipes.
Figure 4-12: Reversing Cold/Hot Water Flow and Return Connections and
OMM-0087_J • GF-143 • 11/17/2020
Sensors from RIGHT HAND to LEFT HAND
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Move Flow and Return
Sensors to other end of
pipes. See Figure 4-13.
NOTE
Torque all bolts to 8.85 ft-lbs (12 N/m)
Move
end caps (and
gaskets) to other
end of
Flow/Return
pipes.
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