Thermino xPlus with Daikin 3H HT R32 Heat Pump - Wiring & Settings
(D0086-DN)
NOTICE
Please read & comply with all these instructions before commencing installation. Failure to install and operate this system in accordance with these instructions will invalidate the manufacturer’s warranty.
Please leave these instructions with the customer for future reference.
Always use these instructions in conjunction with the Installation and User Instructions Manual of the purchased Sunamp heat battery.
1. Introduction
1.1 General
The following instructions provide guidance for the installer and end-user of Thermino® xPlus Heat Batteries when used with compatible Heat Pumps.
These instructions must be read in conjunction with the Installation and User Instructions Manual for the Thermino xPlus product (document D0084 for EU/UK and document D0101 for US/CA).
All installations must be carried out by a competent installer in accordance with local codes and regulations for plumbing, electrical installations and potable water supply.
1.2 Symbols Used
In these instructions the following symbols are being used to draw the user’s attention to information of particular importance.
WARNING
Indicates a hazardous situation that, if not avoided, could result in death or serious injury.
CAUTION
Indicates a hazardous situation that, if not avoided, could result in minor or moderate injury or material damage.
NOTICE
Signals information that is considered important but not hazard related.
1.3 Abbreviations
The following abbreviations are used throughout the manual:
AC – Alternating Current
dT – delta T (change in Temperature)
DHW – Domestic Hot Water
HP – Heat Pump
kW – Kilo Watt
PCB – Printed Circuit Board
PVC – Polyvinyl Chloride
2. Safety
2.1 General Safety Notices
WARNING
Only competent persons suitably qualified to carry out plumbing and electrical work may undertake installations, repairs or relocations of the appliance.
Product training on the full range of Thermino heat batteries is available from Sunamp or authorised training partners.
WARNING
Risk of electric shock – potential dual supply. Always isolate the power supplies to the heat battery controller before working on the heat battery.
CAUTION
These instructions must be read in conjunction with the Installation and User Instructions for the respective Thermino product.
CAUTION
Do not operate the immersion heater until the correct commissioning procedure has been identified and the unit has been appropriately commissioned (see document D0114).
3. Heat Pump Sizing Guideline
This section details the sizing guidance for the Thermino xPlus range of products with Heat Pumps. Its purpose is to assist and offer a guideline for choosing the correct size of Thermino xPlus Heat Battery to Heat Pump Capacity and promote sizing.
The graph below details the relationship between Flow Rate (l/min) and Power (kW) at dT’s of 5 and 7, which are the most common range of operation for heat pumps used in Domestic Hot Water (DHW) mode.
Figure 1 – Power vs Flow Rate relationship
The Thermino xPlus Heat Batteries work to an ideal recommended flow rate for charging via Heat Pumps as detailed in the Installation Manual (D0084 – Table 1). Therefore, the following compatibility table can be used as a sizing guide between Heat Pump Capacity and Heat Battery size:
Heat Battery Size |
Heat Pump Capacity Range (kW) |
|||
(3 to 5) |
(5.5 to 7.5) |
(8 to 10.5) |
(11 to 14) |
|
Thermino 150 xPlus |
o |
o |
o |
Δ |
Thermino 210 xPlus |
! |
o |
o |
Δ |
Thermino 300 xPlus |
! |
! |
o |
o |
|
! – Caution: Special consideration must be given to heat up and reheat times when combining low powered heat pumps with high capacity heat batteries. o – fully compatible sizing. Δ – compatible with the use of an Autobypass valve to ensure the flow rate of the heat pump is within the recommended flow rate for the Heat Battery sizing. | ||||
Table 1: Heat Battery size and Heat Pump capacity compatibility
The Autobypass valve is always recommended in installations with Thermino xPlus Heat Batteries as it also assists in the Heat Pump’s defrost condition requirements.
DN.1 - Daikin 3H HT R32 Heat Pump
WARNING
All Electrical wiring must be carried out by a competent person and be in accordance with the latest local wiring codes and regulations.
Risk of electric shock – potential dual-supply. Always isolate the power supply/ies to the Heat Battery, Heat Pump & Solar Diverter controller (if used) before working on the appliances.
When installing the Thermino xPlus with the heat pump, the steps below should be followed.
These settings are applicable to the following products:
Thermino xPlus with the “DN01” & “DN02” Optimino keys (D0084 – Section 6.4.2 for wiring instructions & Figures DN.1 & DN.2 below)
Heat Pumps from the Daikin 3H HT R32 Heat Pump range
NOTICE
Please note that the Daikin 3H HT R32 heat pump range may not be able to fully charge Thermino xPlus Heat Batteries under all conditions. The use of the automated back-up heating function may be required to reach full charge. This requires the installation of a jumper cable (Link 3) to be placed between FT and 0V at connection J3 on the controller PCBA. This will activate a 45-minute timer during which the HP will operate, followed by the HP switching OFF and the back-up heating element coming ON (after a 5-minute timer) to complete charging the Heat Battery to full charge.
NOTICE
Installing Link 3 will activate the back-up heating element inside the Heat Battery after a 45-minute timer. Please note that this will stop the Heat Battery being charged in Heat Pump mode. This can lead to increased electricity consumption, resulting in higher energy costs. This should be explained to the end user.
Figure DN.1 - Link 3 installed between FT and 0V at connection J3 on the controller PCBA
DN.2 - Wiring
Using a 2-core shielded cable 0.75mm2, the cable will act as a hot water heating tank sensor from the Sunamp Optimino Board (OPTB) – – terminal J3 into the Heat Pump Interface controller PCB Terminal – (DHW Tank sensor – X9A) (please refer to HP installation manual). Please run the wire into the heat battery appliance via the appliance case cabling grommets and then into the control box housing through the hole available. Secure the cables in terminals J3 on the Optimino Board; please see Figures DN.2 & DN.3 below for reference.
Figure DN.2 - Thermino xPlus with DN01 Optimino key
Figure DN.3 - Thermino xPlus with DN02 Optimino key
NOTICE
For other hydraulic connections and wiring instructions, please follow the Instructions of the Sunamp Thermino xPlus Installation Manual (D0084).
DN.3 - Daikin 3H HT Heat Pump controller settings
In the Main menu on of the Hydromodule controller, apply the following settings to the functions listed below:
Function |
Setting |
Tank mode: |
On |
DHW: |
EKHWS/E Tank with booster heater installed at the side of the tank. |
Emergency: |
Auto SH reduced/ DHW off |
Setpoint mode: |
Fixed |
Disinfection: |
Disabled |
Heat up mode: |
Schedule Plus reheat (define this with end user, it is important to allocate a daily time window of 2 hours minimum if using schedule only) |
Comfort setpoint: |
69°C |
Reheat setpoint: |
50°C |
DHW Hysteresis: |
5°C |
Target dT (Flow/ Return) |
5°C |
Table DN.1: Daikin 3H HT HP Hydromodule controller Main settings to apply
In the Field setting Menu on the Hydromodule controller, apply the following settings to the functions listed below:
Function |
Setting |
DHW Maximum setpoint [6-0E] |
70°C |
Table DN.2: Daikin 3H HT HP Hydromodule controller Field settings to apply
DN.3.1 - Wiring applied to Daikin Hydromodule
Jumper Terminal 10 to 11a on terminal bed X2M, using a 0.75mm² wire
4. Appendix
The purpose of this appendix is to enumerate the heat pump manufacturers, heat pump models and the test dates. Please note that all recommended settings, integration and compatibility relate to the product and firmware version at the time of testing. Please see table below for more information:
Manufacturer |
Heat Pump Name/Model |
Date of Test |
Daikin |
Altherma 3H HT R32 8kW, EDLA08 R32 |
17/01/23 |
Document Part Number: D0086-DN
Version Number: 1.6
Publication Date: 29.09.2025
Sunamp Ltd
1 Satellite Park
Macmerry
East Lothian
EH33 1RY
Scotland
Customer Service (Phone): +44 (0)1875 610 001
Customer Service (Email): customerservice@sunamp.com
www.sunamp.com