
Modular Hi-Rise Replacement Series – MIY
INSTALLATION, OPERATION, & MAINTENANCE MANUAL
12
SECTION TWO — Product Line Specific Demolition & Installation, Cont’d.
NOTE: Depending on valve geometry, such
valves may be installed after the
new chassis itself has been slid into
position, and prior to attachment of the
perforated, riser insulation block-off.
Heat damage to insulation should be
avoided.
16. Make mechanical service connections including,
but not limited to: hot water supply (HWS), hot
water return (HWR), cold water supply (CWS),
cold water return (CWR), rubber p-trap to drain
pan, and p-trap to riser-drain stub-out labeled
during Step 6 of demolition.
17. Repressurize riser(s), if shut off during demolition;
and verify that no leaks are present.
18. Purge water coils of air, after isolation valves are
opened to allow flow. All models come with a
manual air vent, at minimum.
19. Seal any remaining chassis openings as well
as possible, to minimize air leakage that would
adversely affect unit performance.
20. Make all high voltage electrical connections,
followed by low voltage connections.
21. Reconnect electrical service at building breaker
panel.Test unit operations and commission as
required.
Figure 3. Acoustical RA block-off Panel
12.20
30.70
.24
.60
Wiring
Diagram
22. Replace the acoustical RA block-off panel
(Figure 3) make sure that the air travels correctly
through the new unit’s coil, to achieve optimal
performance.
23. If there is a top supply, (normally front/side) make
the plenum connection through the top opening
of the new chassis (Figure 4). Be sure to cut and
remove the insulation that covers the top supply
opening.