
Modular Hi-Rise Replacement Series – MIY
INSTALLATION, OPERATION, & MAINTENANCE MANUAL
14
SECTION TWO — Product Line Specific Demolition & Installation, Cont’d.
Riser to Unit Installation
Figure 7. Riser Connection
Ball
Valve
Riser Stubout
Insulation
Threaded
Flare Fitting
Unit insulation
Outer
Cabinet
Riser Knockout
Slot
Before making the riser joints, the riser insulation must
be pulled back away from the joint and protected from
heat during the brazing process. This operation is the
responsibility of the installer. The riser joint solder material
must be selected to withstand the total operating pressure
(both static and pumping head) to which the system will
be subjected. Low temperature lead alloy solders such as
“50/50” and “60/40” are normally not suitable.
Figure 8. Connecting Unit
Flexible
Hose Kit
Riser
Ball
Valve
Riser Stubout
Insulation
Baffle
Connection point to any factory
furnished and installed
components.
Coil
Figure 9.
Back-up
Wrench
Ball
Valve
Wrench
Swivel
Connection
Riser to Drain Installation
Figure 10.
Drain Pan
Drain
Clamp
Clamp
Riser Knockout
Unit Insulation
P-Trap
Unit Wall
Riser
Riser Stubout
1. After the applicable Supply, Return, and Drain
pipe knockouts have been removed, carefully
position the unit so that the riser ball valves
penetrate into the unit through the riser knockouts
making sure the insulation penetrates into the unit
as shown in Figure 8, Figure 9, and Figure 10.
2. Before anchoring the equipment in place, the unit
must be leveled and the cabinet must be plumb
and squared.
The unit may be anchored in place by bolting
directly through the unit floor or attaching the
new chassis to the existing cabinet in some
location that will not interfere with drywall or
other items such as the supply grille, thermostat,
or return access panel. When attaching the
replacement chassis to the old cabinet, care must
be taken to not penetrate the cabinet in locations