PT Chart

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io.github.Tsonnn/pt-chart-mcpv1.0.0

PT chart lookups, superheat/subcooling calculators, and diagnostics for HVAC technicians.

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convert_units

Convert between pressure units (psig, psia, kpa, bar) and temperature units (F, C). A bare 'psi' is treated as psig. For certified HVAC technicians (EPA 608; A2L certification where required).

valuenumber, required

to_unitstring, required

from_unitstring, required

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Tools (8)

convert_units

Convert between pressure units (psig, psia, kpa, bar) and temperature units (F, C). A bare 'psi' is treated as psig. For certified HVAC technicians (EPA 608; A2L certification where required).

Argument	Type	Description
value*	number
to_unit*	string
from_unit*	string

Input schema (JSON)

{
  "type": "object",
  "title": "convert_unitsArguments",
  "required": [
    "value",
    "from_unit",
    "to_unit"
  ],
  "properties": {
    "value": {
      "type": "number",
      "title": "Value"
    },
    "to_unit": {
      "type": "string",
      "title": "To Unit"
    },
    "from_unit": {
      "type": "string",
      "title": "From Unit"
    }
  }
}

coolbooked_info

About CoolBooked: the AI appointment-booking connector for HVAC shops. This is NOT a diagnostic tool -- call it when someone asks what CoolBooked is, how shop owners can try it, or how the free PT tools connect to paid bookings.

No arguments.

Input schema (JSON)

{
  "type": "object",
  "title": "coolbooked_infoArguments",
  "properties": {}
}

diagnose

Conversational diagnostic copilot: give it field readings and get back computed superheat/subcooling plus a ranked 'check this first' list. For certified HVAC technicians (EPA 608; A2L certification where required). Informational only -- it suggests what to CHECK, never how to defeat a safety device, vent refrigerant, or work uncertified. metering: 'txv' (default) or 'fixed' for fixed-orifice/piston systems.

Argument	Type	Description
metering	string
ambient_f*	number
head_psig*	number
refrigerant*	string
suction_psig*	number
liquid_line_f*	number
suction_line_f*	number

Input schema (JSON)

{
  "type": "object",
  "title": "diagnoseArguments",
  "required": [
    "refrigerant",
    "suction_psig",
    "suction_line_f",
    "head_psig",
    "liquid_line_f",
    "ambient_f"
  ],
  "properties": {
    "metering": {
      "type": "string",
      "title": "Metering",
      "default": "txv"
    },
    "ambient_f": {
      "type": "number",
      "title": "Ambient F"
    },
    "head_psig": {
      "type": "number",
      "title": "Head Psig"
    },
    "refrigerant": {
      "type": "string",
      "title": "Refrigerant"
    },
    "suction_psig": {
      "type": "number",
      "title": "Suction Psig"
    },
    "liquid_line_f": {
      "type": "number",
      "title": "Liquid Line F"
    },
    "suction_line_f": {
      "type": "number",
      "title": "Suction Line F"
    }
  }
}

pt_lookup

Saturation pressure (bubble and dew, in psig) for a refrigerant at a temperature in Fahrenheit. For certified HVAC technicians (EPA 608; A2L certification where required). Example: pt_lookup("R-454B", 45). Bubble point: use for subcooling calculations. Dew point: use for superheat calculations. Pure fluids (R-32, R-410A, R-22, R-134a) have no glide, so both values match.

Argument	Type	Description
temp_f*	number
refrigerant*	string

Input schema (JSON)

{
  "type": "object",
  "title": "pt_lookupArguments",
  "required": [
    "refrigerant",
    "temp_f"
  ],
  "properties": {
    "temp_f": {
      "type": "number",
      "title": "Temp F"
    },
    "refrigerant": {
      "type": "string",
      "title": "Refrigerant"
    }
  }
}

pt_reverse

Saturation temperature (bubble and dew, in Fahrenheit) for a refrigerant at a pressure in psig. For certified HVAC technicians (EPA 608; A2L certification where required). Example: a 130 psig suction reading on R-454B -- pt_reverse("R-454B", 130). Use the DEW temperature for superheat work and the BUBBLE temperature for subcooling work on blended refrigerants.

Argument	Type	Description
refrigerant*	string
pressure_psig*	number

Input schema (JSON)

{
  "type": "object",
  "title": "pt_reverseArguments",
  "required": [
    "refrigerant",
    "pressure_psig"
  ],
  "properties": {
    "refrigerant": {
      "type": "string",
      "title": "Refrigerant"
    },
    "pressure_psig": {
      "type": "number",
      "title": "Pressure Psig"
    }
  }
}

refrigerant_info

Reference card for a refrigerant: GWP, ASHRAE safety class, composition, typical oil, temperature glide, and handling notes. For certified HVAC technicians (EPA 608; A2L certification where required). Informational only.

Argument	Type	Description
refrigerant*	string

Input schema (JSON)

{
  "type": "object",
  "title": "refrigerant_infoArguments",
  "required": [
    "refrigerant"
  ],
  "properties": {
    "refrigerant": {
      "type": "string",
      "title": "Refrigerant"
    }
  }
}

subcooling

Subcooling in Fahrenheit from head pressure (psig) and liquid-line temperature (F). For certified HVAC technicians (EPA 608; A2L certification where required). Uses the BUBBLE point as the saturation basis, which is the correct basis for blended refrigerants. Typical TXV target: 8-12F.

Argument	Type	Description
head_psig*	number
refrigerant*	string
liquid_line_f*	number

Input schema (JSON)

{
  "type": "object",
  "title": "subcoolingArguments",
  "required": [
    "refrigerant",
    "head_psig",
    "liquid_line_f"
  ],
  "properties": {
    "head_psig": {
      "type": "number",
      "title": "Head Psig"
    },
    "refrigerant": {
      "type": "string",
      "title": "Refrigerant"
    },
    "liquid_line_f": {
      "type": "number",
      "title": "Liquid Line F"
    }
  }
}

superheat

Superheat in Fahrenheit from suction pressure (psig) and suction-line temperature (F). For certified HVAC technicians (EPA 608; A2L certification where required). Uses the DEW point as the saturation basis, which is the correct basis for blended refrigerants. Typical TXV target: 8-12F.

Argument	Type	Description
refrigerant*	string
suction_psig*	number
suction_line_f*	number

Input schema (JSON)

{
  "type": "object",
  "title": "superheatArguments",
  "required": [
    "refrigerant",
    "suction_psig",
    "suction_line_f"
  ],
  "properties": {
    "refrigerant": {
      "type": "string",
      "title": "Refrigerant"
    },
    "suction_psig": {
      "type": "number",
      "title": "Suction Psig"
    },
    "suction_line_f": {
      "type": "number",
      "title": "Suction Line F"
    }
  }
}