Rheem Marathon Thermal MTS105200 - Manual (Page 7)

7
Water Supply Connections -­ Top of Storage Tank
Refer to the illustration on next page
for suggested typical installation.
The installation of unions or flexible
copper connectors is recommended
on the hot and cold water connections
so that the storage tank may be
easily disconnected for servicing if
necessary. The HOT and COLD water
connections are clearly marked and
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shut-­off valve in the cold water line
near the storage tank.
The cold water connection, hot water
connection, and the temperature
and pressure relief valve may be
temporarily disconnected from the unit
to ease installation by loosening the
union hex nuts connecting the fittings
to the storage tank. The connection of
these parts to the unit use seal rings to
form a water tight connection. Re-­use
the rubber seal rings that are provided
with the heater when re-­installing
the components. Do NOT use pipe
sealant on this joint. Do NOT torque
the union hex nuts to over 35 ft-­lbs
when reinstalling the components.
Failure to properly reconnect the
fittings provided with the storage tank
will void the manufacturer’s warranty.
SOLDER WITH CARE!!! If sweat
connections are used, do NOT apply
heat directly to any component
directly connected to the storage
tank. This includes the cold water
connection, hot water connection,
temperature and pressure relief valve
and the drain valve. Doing so will
damage the storage tank beyond repair
and void the manufacturer’s warranty.
NOTICE: Do not
attempt to turn any
fitting connected
to the storage tank
union hex nuts that
are tightened. Doing
so will damage the
storage tank and void
the manufacturer’s
warranty.
To Fill the Storage tank
Make certain the drain valve is
completely closed.
Open the shut-­off valve in the cold
water supply line.
Open each hot water faucet slowly to
allow the air to vent from the storage
tank and piping.
A steady flow of water from the hot
water faucet(s) indicates a full storage
tank.
Water Connection Ports – On Sidewall of Unit
Two water connection ports are
located on the sidewall of the tank.
These ports have 1-­1/4” female NPT
fittings. (tapered pipe thread).
Teflon pipe tape or “dope” are
recommended for these two
connections.
Fittings must be held securely (and not
turn) during tightening / installation /
removal. Failure to do so may result
in catastrophic damage to the storage
tank.
It is recommended that a threaded
union be installed near the tank.
Maximum flow rate through ports is
20 GPM.