Manifold Cabinets

Manifold Cabinet System

Manifold cabinets house the control systems for underfloor heating distribution. Each cabinet contains a 12V power supply that powers controller boards (Kincony A8), which use dry relay contacts to switch 230V power to normally-open motorized valves.

Naming Convention

Cabinet Level

Format: [FLOOR]M[NUMBER]

• M = Manifold cabinet
• Example: GM1 = Ground Manifold 1, BM1 = Basement Manifold 1, SM1 = Second floor Manifold 1

Component Level

Format: [CABINET]-[ROOM]-[TYPE][ID]

• Example: GM1-KT-FAN1 = Ground Manifold 1, Kitchen, Fan 1
• Example: GM1-PSU1 = Ground Manifold 1, Power Supply 1

Component Type Codes

Code	Description
PSU	Power supply (12v/24v)
FAN	Ventilation fan
CTRL	Controller/relay board (e.g., Kincony A8)
VALVE	Motorized valve (230V, normally open)
TEMP	Temperature sensor (e.g., DS18B20)
SENSOR	Other sensors (water leak, etc.)

Valve Control Architecture

Safety Design

Motorized valves are 230V normally open - they allow heat circulation by default. In case of controller failure or power loss, the system defaults to a safe state with heat flowing through all zones.

Control System

Each manifold cabinet contains:

1. 12V Power Supply - Powers the Kincony A8 controller
2. Kincony A8 Controller - 8-relay board with:
   • Dry relay contacts (10A rated) switching 230V to valves
   • Digital inputs for DS18B20 temperature sensors
   • Digital inputs for water leak sensors
   • Network connectivity for home automation integration

Wiring Path

Electrical Panel (230V) → Manifold PSU → 12V DC → Kincony A8
                       ↓
                  Valve Circuits (230V) → Dry Relay Contacts (10A) → Motorized Valves

Integration with Electrical System

Each manifold cabinet’s power supply is connected to a specific electrical circuit. The manifold component codes (e.g., GM1-KT-FAN1) reference low-voltage components, while their power source is documented in the electrical system (e.g., circuit G2-24 powers GM1-PSU1).

Note: The 230V valve circuits are separate from the 12V control circuits - the Kincony A8’s dry relay contacts provide galvanic isolation between control logic and valve power.

All Manifold Cabinets

Code	Description	Location	Floor	Electrical Circuit	Note
BM1	Basement manifold cabinet	Basement technical room	Basement	-	Future installation - not yet implemented
BM1-PSU1	Power supply	-	12v / 5A	-	Future: Powers Kincony A8 controller
BM1-CTRL1	Controller	-	12v	-	Future: 8-relay board for valve control, DS18B20 temp sensors, water sensors via digital inputs
GM1	Ground floor manifold - Kitchen area	Kitchen manifold cabinet	Ground	G2-24	Main ground floor heating distribution
GM1-PSU1	Power supply	-	12v	-	Powers Kincony A8 controller and ventilation fan
GM1-CTRL1	Controller	-	12v	GM1-PSU1	8-relay board (10A dry contacts) for 230V valve control. Monitors DS18B20 temp sensors and water sensors via digital inputs
GM1-KT-FAN1	Ventilation fan	Kitchen	12v 200mm	GM1-PSU1	Thermaltake CL-F015-PL20BL-A PURE fan - moves warm air from kitchen to other areas
SM1	Second floor manifold cabinet	Second floor technical space	Second	-	Future installation - not yet implemented
SM1-PSU1	Power supply	-	12v	-	Future: Powers Kincony A8 controller
SM1-CTRL1	Controller	-	12v	-	Future: 8-relay board for valve control, DS18B20 temp sensors, water sensors via digital inputs

Cross-References

• Kitchen: Uses GM1 for heat distribution fan (GM1-KT-FAN1)
• Electrical Circuits: See Ground Central 2 for power supply circuits