ENVIRO-TEC
14
FORM ET115.24-NOM4 (819)
SECTION 1 - RECEIPT & INSTALLATION
FLEX HOSE
All Vertical Hi-Rise and Tandem Master & Tandem
Slave units use Kevlar reinforced braided stainless
steel flexible hoses for all water piping between the
coil and the risers or field piping. This factory piping
includes two ball valves per coil, with memory stop.
These hoses are designed with swivel connections on
both ends, and require either a gasket or O-ring for
positive sealing. See
Figure 1 on page 13
for con-
nection details.
These hoses are designed to provide for riser move-
ment due to thermal expansion, and allow for quick,
easy coil removal through the use of the swivel con-
nections.
During transit, vibration may cause a connection to
loosen. Therefore, all threaded connections must be
checked during unit installation. Any fitting that is
loose must be tightened. The stationary side of any
swivel connection must be prevented from twisting
during tightening by the use of a “backup” wrench.
Pressure test all joints before applying water.
Some hose-to-coil joints are furnished
with a removable vulcanized fiber gasket.
This gasket (Part No. PH-05-0047) must
be replaced each time the joint is broken.
Later model units have a hose-to-coil
joint with a black EDPM gasket (Part No.
PH-05-0048). This gasket is re-useable,
but may be replaced should it become
damaged and no longer seal.
FACTORY INSTALLED RISERS
Units provided with factory installed water and drain
risers include fully insulated risers as specified per or-
der. The flex hose and ball valve described above is
assembled to the riser and pressure tested at the fac-
tory. Each unit is configured for a specific location in
the building, and is marked with that location by room
number, floor, riser number, or other identification as
specified per order.
Units provided with factory installed drain risers are
supplied with “full height” drain risers that extend
3” above the top of the unit, and include the standard
“swaged” section at the top. Field piping and venting
of the drain riser must be furnished and installed by
others.
Factory installed risers are strapped to the unit for ship-
ment to prevent damage during transit. These shipping
straps must be removed at installation to allow move-
ment of the risers to assure proper alignment.
See
Figure 3 on page 14
and
Figure 4 on page 15
for details.
At no time should a unit be lifted, moved,
or otherwise handled by the risers.
RISERS
INSTALLED
FACTORY
TYPICAL
REMOVE STRAP,
SHIPPING BRACKET,
FIGURE 3 -
FACTORY INSTALLED RISERS
LD13872
Summary of Contents for VHA
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