# Instance: Field Devices — HVAC (Kingsford BMS)

**WBS leaves served:** 2.4.1, 2.4.2, 2.4.3, 2.4.4, 2.4.5, 2.4.6, 2.4.7, 2.4.8, 3.5.1
**Module ref:** `_playbook/modules/bms/field-devices-hvac.md`
**Project:** Kingsford Hotel Bacolod BMS

## Project-specific parameter values

(All counts derived from A1 with `c_o == "BMS Contractor"` filter for HVAC-related systems)

- Temperature sensors (immersion / thermowell): ~12 (chiller pipes, headers, calorifiers)
- Temperature sensors (duct insertion): ~50 (AHUs, DOAS, PAHU supply/mixed/return)
- Temperature sensors (outdoor): 1 (cooling tower OA)
- Humidity sensors (duct/outdoor): ~24 (AHU/DOAS supply RH, OA RH, mixed RH)
- Pressure sensors (water-side): ~6 (CHW supply/return headers, CHW differential)
- Pressure sensors (air-side static): ~4 (DOAS exhaust fan static pressure)
- Flow sensors (water): ~9 (per-chiller branch flow metering)
- BTU meter (Modbus): 1 (BTU-CHWS-MAIN)
- CO2 sensors (duct, return): ~5 (Casino AHUs, BOH AHUs)
- CO sensors (duct, casino): 2 (AHU-2M.1/2M.2 only)
- VOC sensors (ozonizer return): 2
- pH/conductivity sensors (cooling tower blowdown): 3 (one per CT — supplied by ME but BMS reads — c_o ME)

(Per A1 c_o counts: 215 BMS Contractor I/O points across all systems. Most are HVAC.)

## BOQ line items (Phase 6 input)

| WBS | Description | Qty | Unit | Reference |
|-----|-------------|-----|------|-----------|
| 2.4.1 | Temperature sensor — immersion/thermowell (water) | ~12 | each | A1 |
| 2.4.1 | Temperature sensor — duct insertion | ~50 | each | A1 |
| 2.4.1 | Temperature sensor — outdoor (weatherproof) | 1 | each | A1 |
| 2.4.2 | Humidity sensor (duct/outdoor) | ~24 | each | A1 |
| 2.4.3 | Pressure sensor — water-side | ~6 | each | A1 |
| 2.4.3 | Differential pressure sensor (CHW header) | 1 | each | A1 hdr-chw-bp.diff-press |
| 2.4.3 | Pressure sensor — duct static | ~4 | each | A1 eaf-static-press |
| 2.4.4 | Flow sensor — water (insertion or in-line) | ~9 | each | A1 chiller branch flows |
| 2.4.4 | BTU meter — ultrasonic, Modbus output | 1 | each | A1 BTU-CHWS-MAIN |
| 2.4.5 | Modulating valve actuator (BMS-supplied for CHW bypass) | 1 | each | A1 hdr-chw-bp.iso-vlv-cmd |
| 2.4.6 | Damper actuator (BMS-supplied — typically none for Kingsford as ME provides) | 0 | each | per c_o split |
| 2.4.7 | VFD interface modules (already counted in HLI/Network, no separate BOQ) | — | — | A1 HLI rows |
| 2.4.8 | CO2 sensor (duct) | ~5 | each | A1 return-air-co2 |
| 2.4.8 | CO sensor (duct) | 2 | each | A1 return-air-co |
| 2.4.8 | VOC sensor (ozonizer return) | 2 | each | A1 ozonizer voc |
| 2.4 | Mounting brackets, thermowells, valve fittings, marker tags | 1 | lot | per device count + 5% spare |
| 3.5.1 | HVAC field device installation labor (mount, terminate, label) | ~135 | hr | B4: device install (~135 instances × 1 hr) |

(Note: counts are aggregated estimates from A1; refine via the C1 matrix breakdown.)

## Open assumptions for this instance

- Brand: tier-1 sensor vendor (Belimo/Siemens/JCI/Honeywell/Sauter) — per Q-013
- Sensor accuracy class: ±0.5°C HVAC, ±2% RH, ±1% pressure
- Q-008 (mech layouts) may revise mounting locations and cable lengths
- A-001 cable runs apply (30 m avg per device, per A3)

## Cross-references

- **Working docs:** A1 (BMS-supplied HVAC rows), A2 (equipment count), A3 (cable per device), C1 (C/O matrix)
- **Assumptions:** A-CHW-001/002, A-VENT-001
- **Clarifications:** Q-008 (mech layouts), Q-013 (brand)