substitution request - Alliance Construction Solutions

G. Duct installation requirements are specified in Section 233113 "Metal Ducts" and Section 233116
"Nonmetal Ducts." Drawings indicate the general arrangement of ducts. The following are
specific connection requirements:
1. Install ducts to termination in roof-mounted frames. Where indicated, terminate return-air
duct through roof structure and insulate the space between roof and bottom of
dehumidification unit.
3.4 FIELD QUALITY CONTROL
A. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test,
and adjust components, assemblies, and equipment installations, including connections.
B. Perform tests and inspections.
1. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect
components, assemblies, and equipment installations, including connections, and to assist
in testing.
C. Tests and Inspections:
1. Leak Test: After installation, fill water coils with water, and test coils and connections for
leaks. Repair leaks and retest until no leaks exist.
2. Charge refrigerant coils with refrigerant and test for leaks. Repair leaks and retest until no
leaks exist.
3. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and
equipment.
D. Dehumidification unit will be considered defective if it does not pass tests and inspections.
E. Prepare test and inspection reports.
3.5 STARTUP SERVICE
A. Engage a factory-authorized service representative to perform startup service.
1. Complete installation and startup checks according to manufacturer's written instructions.
B. Perform the following final checks before startup:
1. Verify that shipping, blocking, and bracing are removed.
2. Verify that unit is secure on mountings and supporting devices and that connections to
piping, ducts, and electrical systems are complete. Verify that proper thermal-overload
protection is installed in motors, starters, and disconnect switches.
3. Perform cleaning and adjusting specified in this Section.
4. Disconnect fan drive from motor, verify proper motor rotation direction, and verify free fan
wheel rotation and smooth bearing operations. Reconnect fan drive system, align belts,
and install belt guards.
5. Check lubrication of bearings, pulleys, belts, and other moving parts.
6. Set outside- and return-air mixing dampers to minimum outside-air setting.
7. Install clean filters.
Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
23 8416 - 10 MECHANICAL DEHUMIDIFICATION
UNITS