Crestline Equipment Schedule / ASME BPVC

Crestline Equipment Schedule / ASHRAE 90.1

The pump is operating at its scheduled design point. PHWP-5 at 165 GPM, 16 ft WG, and 69.7% efficiency matches the equipment schedule exactly. The 3x3x7C designation means 3-inch suction, 3-inch discharge, 7-inch impeller (C trim). The 69.7% efficiency is acceptable for a pump of this size — ASHRAE 90.1 establishes minimum pump efficiency requirements based on flow and head. This pump uses a 3 HP motor at 460V/3-phase, and at 69.7% efficiency the calculated brake horsepower is about 0.96 HP, well within the motor's capacity.

Crestline Equipment Schedule / ASHRAE Handbook

The fill pressure is too high. The schedule specifies 30 PSIG fill pressure, not 50 PSIG. Fill pressure must equal the static pressure at the tank location plus a small margin (typically 5 PSI). At 50 PSIG, the bladder is over-inflated — it will prevent the system from accepting expanded water as it heats up, causing the relief valve to open and dump water. The 30 PSIG fill pressure is calculated based on the building height and system static head at the tank connection point. Always verify the pre-charge with a gauge before filling the system.

Crestline Equipment Schedule / ASME

The expansion tank fill pressure of 30 PSIG matches the equipment schedule specification. The pre-charge pressure must be set above the system static pressure (25 PSIG at tank elevation) to prevent the tank diaphragm from being fully compressed by static head before the system heats up. At 30 PSIG, the tank provides 5 PSI above static to ensure proper expansion volume is available when the system heats from fill temperature to operating temperature. The tank absorbs the volume increase as water expands, preventing the pressure relief valve from opening during normal operation.

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.