Install Instructions

Viega IM-PFMB 1007
12
3
. When installing the MANABLOC in
a location other than between
studs, provisions must be made to
support the tubing runs as they exit
the MANABLOC. (See section 5).
4. Any installed cover panel shall
allow access to the MANABLOC
and its mounting screws, the port
valves, distribution line connections
and supply line connections.
5. To maximize potential water and
energy savings, the MANABLOC
should be mounted as close as is
practical to the hot water source,
taking into consideration the
following:
a. When the MANABLOC is
mounted above the water heater,
there shall be a minimum of 36"
of connecting tubing between the
water heater and the MANABLOC
to reduce the chance of
heat stacking;
b. When the MANABLOC is
mounted beside the water heater
and is connected with tubing
incorporating a horizontal flow, it
s
hall be connected with at least
18" of tube length. Mounting the
MANABLOC within 8 (eight) feet
of developed tube length of the
water heater will minimize delivery
time of hot water to individual
fixtures.
c. The unit should be installed in an
area which is centrally located to
the most dense concentration
of served fixtures. Some
applications will require that the
MANABLOC be mounted further
than eight (8) feet from the hot
water source. See page 5 for
suggestions to reduce hot water
delivery time in these instances.
6. DO NOT install the MANABLOC
within a continuously recirculating
hot water plumbing loop. The
MANABLOC, however, may be
supplied from a recirculating hot
water loop. (See figure below.)
7. Position the MANABLOC so that it
can be securely fastened through
the holes provided in the mounting
If the MANABLOC must be mounted further than
eight (8) feet from the hot water source, the
MANABLOC may be supplied from a recirculating hot
water loop with ViegaPEX CL-R listed PEX tubing.
Continuously Recirculating Hot Water Plumbing Loops
b
rackets. The mounting surface
should be as flat as possible so as
not to induce any twisting or
bending forces on the unit. The
MBB2 Mounting Straps simplify
mounting between studs on 16"
centers.
4.6 Valve Operation
A MANABLOC system, which has
valves on all of the outlet ports, does
not require stop valves at the fixtures.
However, the Authority Having
Jurisdiction (AHJ) may require stop
valves at some fixtures.