Crestline Equipment Schedule / IMC 607

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 / ASME BPVC

The pressure relief valve is set 10 PSI above the boiler's rated working pressure. Per ASME Boiler and Pressure Vessel Code, the relief valve must be set at or below the maximum allowable working pressure (MAWP) of the vessel — which is 150 PSIG for this Fulton EZE-480. Setting the relief valve at 160 PSIG means the boiler could operate above its rated pressure before the valve opens, risking vessel failure. The relief valve must be reset to 150 PSIG or lower. The boiler operates at EWT 100°F / LWT 120°F with only 2.5 ft WG pressure drop.

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 / NEC Article 430

The pump is connected to the wrong voltage. PHWP-1 is scheduled for 460V/3-phase, not 208V/3-phase. A 460V motor connected to 208V would receive less than half its rated voltage, resulting in severe overheating, drastically reduced torque, and motor burnout within minutes. Per NEC Article 430, the motor branch circuit must match the motor nameplate voltage. The electrician must verify the motor nameplate against the schedule and connect to the correct 460V panel. All four PHWP pumps (1 through 4) are 460V/3-phase at 5 HP.