Crestline Equipment Schedule / NEC Article 430

Crestline Equipment Schedule / IMC 607

This is correct. Per the Crestline schedule, fire-only dampers (FD = Ruskin DFD60) use fusible links — a passive thermal element that melts at a set temperature (typically 165°F), allowing a spring to close the damper. No motor or electrical connection is needed. This is different from fire smoke dampers (FSD = Ruskin FSD60) which require motorized actuators at 120V to respond to smoke detection signals. Fire-only dampers are simpler, cheaper, and appropriate where only fire rating is required (no smoke detection needed).

Crestline Equipment Schedule / IMC Table 403.3

The fan is underperforming by 25%. At 75 CFM, the EF-100 is delivering only 75% of its scheduled 100 CFM airflow. This could indicate a blocked duct, damper not fully open, or excessive static pressure in the ductwork. IMC Table 403.3 requires specific exhaust rates for restrooms (typically 50 CFM per water closet or 1 CFM/sq ft). While 75 CFM might still meet minimum code for a small restroom, the fan must be balanced to its scheduled 100 CFM. TAB tolerance per AABC is +/- 10%, meaning acceptable range is 90-110 CFM.

Crestline Equipment Schedule / Manufacturer Rating

The leaving water temperature of 130°F exceeds the scheduled 120°F LWT by 10°F. Air-to-water heat pumps are rated at specific entering and leaving conditions — running AWHP-1 at 130°F LWT instead of 120°F significantly reduces capacity and COP. The 20°F delta-T (100°F to 120°F) is the design condition at which the 1,670 MBH capacity was certified. At 130°F LWT, the heat pump must work against a higher condensing temperature, reducing efficiency by roughly 2-3% per degree above rated LWT. The setpoint must be corrected to 120°F.

Crestline Equipment Schedule / NFPA 90A

Fire smoke dampers must be connected to emergency power per the Crestline equipment schedule and NFPA 90A. During a fire, normal power may be lost — if the FSD actuators lose power, they cannot respond to smoke detection signals. While spring-return actuators will fail closed on power loss (a safe condition), the dampers cannot be reopened by the fire alarm system for smoke control sequencing or reset after a false alarm without power. Emergency power ensures the dampers remain controllable throughout the fire event for firefighter smoke management operations.

Crestline Hydronic Specification

The valve fails the accuracy requirement. The specification requires flow accuracy within 10% of setpoint, meaning the acceptable range for a 15 GPM setpoint is 13.5-16.5 GPM. At 13.2 GPM, the valve delivers only 88% of design flow — 12% below setpoint and 0.3 GPM outside the acceptable range. While the pressure drop of 2.5 PSI passes the 3 PSI maximum, the flow accuracy failure means the downstream coil is not receiving adequate water flow, which reduces cooling capacity and can cause comfort complaints. The valve needs recalibration or replacement.

Crestline Louver Schedule / AMCA 550

This installation is correct. Per the Crestline louver schedule, 1,000 CFM requires a minimum of 2.0 sq ft free area. At this combination, the face velocity is 500 FPM (1,000 CFM / 2.0 sq ft = 500 FPM), which is the maximum recommended velocity for storm-resistant louvers per AMCA 550. The drainable blade design allows rain that enters the louver to drain back outside rather than entering the duct system. The louver size, type, and free area all meet the specification requirements.