CENTRAL HEATING I-KI Manuale utente

rev001 pg. 1

i-KI Commissioning with Nadi Controller

This document must be read in association with the i-KI installation manual provided with the

unit. The purpose of this document is to assist with the commissioning of the heat pump. It is

essential the manual is read and followed to ensure the installation is per manufacturers

criteria.

There are various systems/set ups the Heat Pump can be installed to. This document will

covers the most common options:

Pre-Commissioning Page 1

B. Underfloor with Aube Thermostat Page 6

C. Underfloor with Aube Thermostat and DHW Page 8

D. Underfloor with Buffer Tank, Aube Thermostat and DHW Page 12

E. Underfloor with Nadi Controller Page 14

Final Notes –Complete commissioning, checking

Temperatures, Troubleshooting Page 16

Prior to Commissioning

A) Ensure the heat pump is installed in accordance with the installation manual.

B) Ensure the power is isolated to the unit

C) Remove the side cover of the unit to expose the water pump, compressor and electrical

enclosure.

D) Check that the water pump on the unit is free to turn and not seized. In addition please

check any internal pumps.

E) Fill the system with water and ensure all air is removed.

Fill the system with water

The system can now be filled with

water to around 1 bar pressure.

The iKi heat pumps have a pump

run switch on the small PCB

under the front cover of the heat

pump on the smaller heat pumps,

and under a panel on the side of

the larger models. This allows

the circulation pump to be run

manually to help vent the system.

Leave the unit on standby for 2 hours once filled.

Before the heat pump runs for the first time it is necessary to let it stand for 2 hours

with the power on. This is to allow the heating band around the compressor to heat

the compressor to drive off any liquid refrigerant in the compressor. This is

rev001 pg. 2

necessary as the compressor is only designed to compress gas and if any liquid

refrigerant is in the compressor when it starts it could be damaged.

In the interim steps 3 and 4, setting the clock, can be completed.

What happens when you turn on the main isolator

The Nadi controller room unit will go through an initialisation phase

that can last a few minutes and will show Cn followed by init before

showing Off with the time.

Do not put it into DHW or heating mode for 2 hours. During this

time you can set the clock and change any necessary parameters.

Set the clock

rev001 pg. 3

Switching on the controller ON (controller only. This does no switch the

heat pump on)

Accessing the Menu/Parameters within the Nadi Controller.

To access the menu within the Nadi Controller press

and hold the and for 3 secs.

(if the sun symbol on the top left hand corner appears, press the

mode button to turn it off –we do wish for the heat pump to run

yet)

Turn the knob and select the required code

Once the code, in this case 012, is displayed on the screen, press the

knob to confirm.

The screen now displays MnOO i.e. Menu OO

rev001 pg. 4

Turn the knob until you reach the required parameter. Once you see the required parameter

on the screen press the knob to confirm.

Turn the knob to adjust the setting.

Press the knob to confirm the adjusted setting.

Menu Settings

The table below shows the various menus for accessing parameters and the associated

passwords to gain access to the relevant locations.

rev001 pg. 5

Heat Pump Control Options.

Underfloor with Aube Thermostat

The schematic below illustrates the set up for the commissioning steps that follow.

A1.

Check all wiring connections

Ensure BT8 (DHW Sensor) and BT9 (Buffer Tank Sensor) remain connected and left

placed inside the wiring module.

Check BT1 and BT2 probes are in the correct pockets.

Heating is controlled with the Aube Thermostat. It must be connected to SA1, via a

relay. The schematic on the next page shows an Omron Relay and the relevant

connections. Should an alternative relay be used please ensure you check the

required connections and wire as necessary.

It is recommended that a flow switch is installed. Should you not install a flow switch

then it is necessary to install a bridge between terminals 39 and 40.

i-KI Internal Module Final Wiring layout –Underfloor Layout with Aube Thermostat

rev001 pg. 6

A2.

Parameter Settings

Aube Thermostat Control - Ensure the Nadi controller is disabled as a room stat and the

Aube Thermostat is activated.

Parameter 11D is factory set to 1. Check to ensure this parameter is set to 1.

Menu 1, and turn the knob anti-clockwise until 11D displays on the screen. If set to 0,

change to 1.

A3.

Heating Set Point/Weather Compensation.

Determine if the heating will operate from fixed return set point or outside weather

compensation.

Return Set Point

Menu 1, parameter 0152 (weather compensation) –

ensure this is set at 0. (0=disabled)

Menu 1, parameter 0153 (fixed return water

temperature) –adjust the set point as required

(typically 45 for underfloor heating).

This parameter is defaulted to 55. The setting needs to be set in accordance with the

floor covering.

Weather Compensation (if required)

Menu 1, parameter 0152 –change to 1.

Menu 1, parameter 0159 –set the compensation curve from the graph below.

rev001 pg. 7

A4.

Testing the Heating

First start the heat pump in heating mode only to check the

heating.

Using the mode button on the top left of the Nadi room

controller press until the sun symbol shows.

Ensure Heat is going to the area/zone.

A5.

What you see if the heat pump is trying to provide heating

Before the heat pump runs the compressor to produce heat it first runs it’s circulating

pump to test the temperature of the water passing through the heat pump. This is known

as “sniffing”.

When the heat pump is sniffing the pump symbol, , at the bottom of the screen will

flash.

This will keep flashing as long as the sniffing is in process. This is defaulted at 3 minutes.

In addition once the water has reached temperature the heat pump will also sniff for a

period of 10 minutes (default).

These two parameter settings can be adjusted by the following:

Menu 1, parameter 0147, Sniffing default at 10mins, valve 18 = 180 secs.

Menu 1, parameter 0148, Sniffing cycle, off time between sniffs in minutes, value 10 = 10

minutes

Please note: If the heat pump drops below its set point temperature the unit will start with

the heat pump symbol going solid and the compressor symbol flashing. Once the

compressor starts the symbol goes solid.

Underfloor with Aube Thermostat and DHW

The schematic below illustrates the set up for the commissioning steps that follow.

rev001 pg. 8

B1.

Check all wiring connections

Ensure BT9 (Buffer Tank Sensor) remains connected and left placed inside the wiring

module.

Check BT1 and BT2 probes are in the correct pockets.

Ensure BT8, the DHW sensor probe, is located in the hot water cylinder.

Heating is controlled with the Aube Thermostat. It must be connected to SA3, via a

relay. The schematic below shows an Omron Relay and the relevant connections.

Should an alternative relay be used please ensure you check the required connections

and wire as necessary.

It is recommended that a flow switch is installed. Should you not install a flow switch

then it is necessary to install a bridge between terminals 39 and 40.

i-KI Internal Module Final Wiring layout –Underfloor Layout with Aube Thermostat and

DHW

B2.

Parameter Settings

Aube Thermostat Control - Ensure the Nadi controller is disabled as a room stat and the

Aube Thermostat is activated.

Parameter 11D is factory set to 1. Check to ensure this parameter is set to 1.

Menu 1, and turn the knob anti-clockwise until 11D displays on the screen. If set to 0,

change to 1.

B3.

Heating Set Point/Weather Compensation.

Determine if the heating will operate from fixed return set point or outside weather

compensation.

rev001 pg. 9

Return Set Point

Menu 1, parameter 0152 –ensure this is set at 0.

Menu 1, parameter 0153 –adjust the set point as

required (typically 45 for underfloor heating).

Weather Compensation

Menu 1, parameter 0152 –change to 1.

Menu 1, parameter 0159 –set the compensation curve from the graph below.

Domestic Hot Water

It is essential that the correct cylinder coil is used. Use a Baxi Twin Coil Cylinder or check

with CHNZ if an alternative tank is being used. It is also advised that a temperature set

point of 50oC.

There are 2 set points for DHW, Comfort and Economy. The comfort set point is the

required set point that needs to be changed.

We enable the Comfort set point by setting 0015 to 1 and then setting 0023:

Menu 0, parameter 0015 –ensure this is set to 1 (1= comfort, 0= economy)

Menu 0, parameter 0023 –set the comfort set point to 50oC.

B5.

Testing the Heating

First start the heat pump in heating mode only to check the

heating.

Using the mode button on the top left of the Nadi room

controller press until the sun symbol shows.

rev001 pg. 10

B6.

Test the DHW

To test the DHW, switch on the DHW on the Nadi controller, the

symbol should appear.

The 3-way valve should turn to the “open” position.

Valve actuator points to OPEN position

when DHW is being heated.

Notch position when being installed: A to left

and AB to right. DHW on AB side. Notch is

in the heating position as shown above;

Rotates 90 degrees to the right when

activated to supply DHW.

The heat pump may stop for a while and then resume or it may continue to run. Either

way, while the compressor is running, the three way valve will swing over to the open

position and start to heat the cylinder. Check for the correct function.

The actual temperature in the hot water cylinder is parameter 0902.

B7.

What you see if the heat pump is trying to provide heating

Before the heat pump runs the compressor to produce heat it first runs it’s circulating

pump to test the temperature of the water passing through the heat pump. This is known

as “sniffing”.

When the heat pump is sniffing the pump symbol, , at the bottom of the screen will flash.

This will keep flashing as long as the sniffing is in process. This is defaulted at 3 minutes.

In addition once the water has reached temperature the heat pump will also sniff for a

period of 10 minutes (default).

These two parameter settings can be adjusted by the following:

Menu 1, parameter 0147, Sniffing default at 3mins, valve 18 = 180 secs.

Menu 1, parameter 0148, Sniffing cycle, off time between sniffs in minutes, value 10 = 10

minutes

Please note: If the heat pump drops below its set point temperature the unit will start with

the pump symbol going solid and the compressor symbol flashing. Once the compressor

starts the symbol goes solid.

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