Crestline Equipment Schedule / ASHRAE 90.1

Crestline Electrical Specification (THD ≤ 3%; cf. IEEE 519-2022)

The Crestline electrical specification requires total harmonic (voltage) distortion (THD) at the point of common coupling to remain below 3% — stricter than the IEEE 519-2022 voltage-distortion limits of 5% (1–69 kV) / 8% (≤1 kV total). A 4% THD measurement exceeds the project's 3% cap, indicating insufficient harmonic filtering, which can overheat transformers, trip breakers, and damage sensitive electronics on the same bus.

Crestline Equipment Schedule

This installation is acceptable. The radiator WH-2 is operating near its schedule point at 119°F EWT and 101°F LWT (18°F delta-T) with 0.3 GPM flow. By energy balance, the heat the water gives up is exactly Q = 500 × 0.3 × 18 = 2,700 BTU/hr — that IS the radiator's actual heat output, not a 'theoretical' value. That is about 15% above the 2,339 BTU/hr scheduled output, so the unit is over-delivering slightly versus its design point. The gap is not a heat-transfer-coefficient effect: the coefficient and fin/air-side performance determine what delta-T you GET, but once flow and delta-T are measured the output is fixed by energy conservation. A modest over-delivery like this is normal and acceptable in the field.

Crestline Equipment Schedule / AHRI 1230

The measured values match the scheduled capacity exactly. FCU-B2-1-06 at 4.5 tons nominal delivers 52.7 MBH total and 45.9 MBH sensible cooling per the schedule. The sensible heat ratio (SHR) is 0.87 (45.9/52.7), indicating this indoor unit handles mostly dry cooling loads. The heating capacity of 68.9 MBH should also be verified during winter commissioning. The unit connects to outdoor unit HR-B2-R-01 (34-ton heat recovery), which serves multiple indoor units simultaneously.

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.