Crestline Equipment Schedule / Manufacturer Rating
What it means on the job
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.
Tested in 1 CraftIQ puzzle
- code-checkCrestline AWHP Leaving Water Temperature
Related OTHER sections
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 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 / 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.
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.
CraftIQ explanations are original educational commentary written in trade language and verified against the cited standards. Always confirm requirements against the code edition adopted by your jurisdiction — this is training material, not a substitute for the code book or your AHJ.