Modular Hi-Rise Replacement Series – MIY
INSTALLATION, OPERATION, & MAINTENANCE MANUAL
15
SECTION THREE — Finishing Installation
that may damage internal components or wiring.
The mounting technique is a matter of choice;
however, the unit should always be anchored
securely to prevent movement during construction
and riser expansion, contraction, and accidental
contact.
After anchoring the new unit, it is then ready for
the various service connections to be made such
as riser and electrical connections.
4. All
mini
ReStora
mod
™
units use reinforced braided
stainless steel flexible hose kits for piping between
existing risers and unit water coils as shown
in Figure 8. The hose kit design has threaded
connections on each end. The hose kits allow for
riser fluctuations due to thermal expansion.
5. Use a wrench to tighten the swivel connections.
Use a backup wrench to hold the riser ball valve
stationary to prevent it from bending or twisting
during installation as shown in Figure 9. Be careful
to not over tighten swivel connections.
6. Locate the unit’s coil unions, bracketed at the top
of the coil assembly.
7. The plastic flare caps on the end of the coil fitting
should be removed and discarded.
8. Use a wrench to tighten the swivel connections.
Be careful to not over tighten swivel connections.
9. Locate the rubber p-trap drain hose, factory
installed to the drain pan connection in the bottom
of the unit as shown in Figure 10.
10. Push the rubber drain hose over the riser drain
stub-out. Be careful that you do not bend the
drain stub-out.
11. Adjust the hose clamp over the riser stub-out and
rubber hose to hold in place as shown in Figure 10.
12. Test for leaks. Any and all leaks should be repaired
before proceeding with installation. When testing
with air or some other gas, it might be necessary
to tighten stem packing nuts on some valves to
maintain air pressure in the riser. Pressure testing
risers with water should be done with the unit
service valves closed to prevent flushing debris
into the unit valve packages. All leaks should
be repaired before proceeding with the unit
installation.
13. After system integrity has been established, the
riser insulation must be pulled back into place over
the joint and glued or sealed to prevent sweating
and heat loss or gain. All of the risers including the
riser stub-outs should be properly covered with
insulation. Internally mounted chilled water piping
and valves are located over the drain pan and
need not be insulated.
It is the responsibility of the installer to make sure that an
isolation valve is installed between each supply and return
piping connection to the unit.
SECTION THREE – Finishing Installation
Grille/Ductwork Installation
All ductwork and/or supply and return grilles should be
installed in accordance with the installation instructions
and project specifications. If not included on the unit or
furnished from the factory, supply and return grilles should
be provided as recommended in the product catalog.
NOTE: Refer to CAUTION and WARNING on page 2
(inside front cover) of this catalog.
The safest method of freeze protection is to use glycol in
the proper percent solution for the coldest expected air
temperature.
Electrical Connections
The unit serial plate lists the unit electrical characteristics
such as the required supply voltage, fan and heater
amperage and required circuit ampacities. The unit wiring
diagram shows all unit and field wiring. Since each project
is different and each unit on a project may be different,
the installer must be familiar with the wiring diagram and
serial plate on the unit BEFORE beginning any wiring.
The unit electrical power supply and entry location