Panasonic Aquarea Options Board — Additional Functions PCB

Description

The Panasonic CZ-NS4P is the Optional PCB that unlocks a range of advanced system functions on Aquarea heat pumps — from two-zone heating control to pool heating, buffer tank management, solar integration and Smart Grid readiness. It fits directly onto the indoor unit's main control board, extending what a standard installation can do without needing a separate control cabinet.

2-Zone Control

Key function

SG Ready

Smart Grid

Solar + Buffer

Integration

Pool Heating

Supported

Demand Control

Supported

Fits Main PCB

Installation

One board, multiple advanced functions

The CZ-NS4P is a single accessory unlocking several enhanced functions at once — you don't need separate boards for two-zone control, buffer tank management and Smart Grid readiness.

Disables some standard inputs when fitted

Once the CZ-NS4P is installed, the main PCB's built-in room sensor 1 input and extra pump control contacts are disabled — those functions are handled through the Optional PCB instead. Factor this into your system wiring design.

Functions enabled

Two-zone control

Manage two independent heating zones — for example underfloor heating and radiators — each with its own water sensor, room sensor and pump control.

Buffer tank control

Adds buffer tank temperature monitoring and control logic, supporting hydraulic buffer configurations on more complex system designs.

Solar integration

Connects a solar thermal sensor and pump, allowing the Aquarea system to work alongside a solar hot water contribution.

Pool heating control

Adds a dedicated pool water pump and sensor connection, letting the heat pump contribute to swimming pool heating alongside space heating and DHW.

Demand control & SG Ready

Supports an external 0–10V demand signal and Smart Grid (SG Ready) inputs — the system can respond to external load or tariff signals, including boosting setpoints when on-site PV generation is available.

External switching and error signalling

Adds external error signal output, an external compressor stop switch, and an external heat/cool switch-over input — useful for BMS or bespoke control integration.

Technical specification

Model code	CZ-NS4P
Function	Optional PCB for advanced Aquarea system functions
Fitting	Connects to the Main PCB inside the indoor unit
Functions enabled	2-zone control, pool heating, buffer tank control, solar control, external error signal output, demand control, SG Ready, external compressor stop, external heat/cool switch
Sensor inputs	Room sensor(s), buffer tank sensor, pool sensor, water sensor(s) zone 1/2, solar sensor
Maximum cable length — sensor inputs	30 metres
Maximum cable length — outputs and other inputs	50 metres
Effect on Main PCB	Room sensor 1 input and extra pump control contacts on Main PCB are disabled once fitted
Compatibility	Panasonic Aquarea H Generation (and compatible platforms specifying CZ-NS4P)

What's in the box

• 1 × Panasonic CZ-NS4P Optional PCB
• Mounting holders and spacers
• Manufacturer installation instructions

Related sensors typically used with this board (sold separately)

• PAW-A2W-TSHC — zone water sensor (one per zone)
• PAW-A2W-TSBU — buffer tank sensor
• PAW-A2W-TSSO — solar sensor
• PAW-A2W-TSRT — zone room sensor

Frequently Asked Questions

Do I need this board for a standard single-zone install?

No — a straightforward single-zone system with a standard DHW cylinder doesn't need the CZ-NS4P. It's specifically for installations needing enhanced functions such as two-zone control, pool heating, solar integration, or Smart Grid readiness.

What sensors do I need alongside this board?

It depends which functions you're enabling. For two-zone control, you'll typically need PAW-A2W-TSHC zone water sensors (one per zone). For buffer tank or solar integration, you'll need the corresponding PAW-A2W-TSBU or PAW-A2W-TSSO sensors.

Does fitting this board disable anything on the standard system?

Yes — once installed, the Main PCB's room sensor 1 input and extra pump control contacts are disabled, since those functions move to the Optional PCB. Your installer should account for this in the wiring design.

Is this compatible with my Aquarea generation?

The CZ-NS4P is specified for H Generation Aquarea systems. Confirm compatibility with your specific model — send us your outdoor or indoor unit code and we'll verify before you order.

Can this be used for Smart Grid / SG Ready integration?

Yes — the board supports SG Ready signal inputs, allowing the system to increase heating or DHW setpoints in response to available on-site solar PV generation or favourable grid signals.

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Room Dimensions

Length (in m):

Width (in m):

Height (in m):

Room Type

Living Room

Bedroom

Kitchen

Bathroom

Conservatory

Hallway

Glazing Type

Single Glazed

Double Glazed

Triple Glazed

External Walls

0 Wall

1 Wall

2 Walls

3 Walls

4 Walls

Insulation Level

Poor

Average

Good (New Build)

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Required Heating

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