CLIVET WSAN-YMi 81 User Manual (English)

Questions and Answers:

C
Christian AveryAug 12, 2025
Why is my CLIVET WSAN-YMi 81 Air Conditioner not heating or cooling properly?
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  Hannah Rios MDAug 12, 2025
  If your CLIVET Air Conditioner isn't heating or cooling as expected, it could be due to several reasons. First, check if the temperature setting on the controller is correct (T4HMAX, T4HMIN in heat mode; T4CMAX, T4CMIN in cool mode; T4DHWMAX, T4DHWMIN in DHW mode). Also, ensure that the water flow isn't too low by verifying that all shut-off valves are completely open, the water filter is clean, there's no air in the system, the water pressure is above 1 bar when cold, the expansion vessel isn't broken and the resistance in the water circuit isn't too high for the pump. Finally, check that the water volume in the installation is above the minimum required value.
C
cjordanAug 16, 2025
What to do if CLIVET WSAN-YMi 81 has space heating capacity shortage at low outdoor temperatures?
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  Kimberly StephensAug 16, 2025
  If you're experiencing a space heating capacity shortage with your CLIVET Air Conditioner during low outdoor temperatures, it might be due to the backup heater not being activated. Check that the 'OTHER HEATING SOURCE/ BACKUP HEATER' is enabled and verify that the thermal protector of the backup heater hasn't been activated. Also, ensure the booster heater isn't running simultaneously with the backup heater. Another possible cause is too much heat pump capacity being used for heating domestic hot water. To resolve this, check that the 't_DHWHP_MAX' and 't_DHWHP_RESTRICT' are configured appropriately, disable the 'DHW PRIORITY' in the user interface, and enable the 'T4_TBH_ON' in the user interface/FOR SERVICEMAN to activate the booster heater for domestic water heating.
K
Kenneth Marsh IIIAug 19, 2025
How to fix a CLIVET WSAN-YMi 81 Air Conditioner when the compressor isn't starting?
- C
  clarkrobinAug 19, 2025
  If the compressor of your CLIVET Air Conditioner isn't starting for space heating or domestic water heating, it could be because the unit is starting up outside of its operation range due to low water temperature. In this case, the system uses a backup heater to reach the minimum water temperature (12°C). Check that the backup heater power supply is correct, the thermal fuse is closed, the thermal protector isn't activated, and the contactors aren't broken.
A
Amanda MarshallAug 23, 2025
Why is the pump in my CLIVET WSAN-YMi 81 Air Conditioner making noise (cavitation)?
- M
  Megan MillerAug 23, 2025
  The pump in your CLIVET Air Conditioner might be making noise (cavitation) because there is air in the system. If so, purge the air. Alternatively, the water pressure at the pump inlet might be too low. Check that the water pressure is greater than 1 bar when the water is cold, ensure the manometer isn't broken, verify the expansion vessel isn't broken, and confirm the setting of the pre-pressure of the expansion vessel is correct.
K
Katie SmithAug 27, 2025
What to do if CLIVET WSAN-YMi 81 Air Conditioner DHW mode can’t change to Heat mode immediately?
- J
  Jaime FisherAug 27, 2025
  If your CLIVET Air Conditioner can't switch from DHW mode to Heat mode immediately, it could be due to several reasons. The heat exchanger for space heating might not be big enough, in this case set t_DHWHP_MAX to a minimum value (the suggested value is 60min), connect the circulating pump out of the unit to the unit if it is not already controlled by it, and add a 3-way valve at the inlet of the fan coil to ensure enough water flow. Alternatively, the space heating load might be small, in which case no heating is needed. Finally, if the disinfect function is enabled but without TBH, disable the disinfect function, and add TBH or AHS for DHW mode.
H
Heather PetersAug 30, 2025
Why does the water pressure relief valve open on my CLIVET WSAN-YMi 81?
- M
  Monique JohnsonAug 31, 2025
  The water pressure relief valve on your CLIVET Air Conditioner might open if the expansion vessel is broken, in which case you should replace it. Another reason could be that the filling water pressure in the installation is higher than 0.3MPa. Make sure that the filling water pressure in the installation is about 0.15~0.20MPa.
T
troywilsonSep 3, 2025
What to do if CLIVET WSAN-YMi 81 DHW mode heat pump stops but setpoint not reached, space heating require heat but unit stay in DHW mode?
- N
  Nathan CastanedaSep 3, 2025
  If the CLIVET Air Conditioner's DHW mode heat pump stops working before reaching the setpoint, and the unit remains in DHW mode despite space heating being required, it could be because the surface of the coil in the tank isn't large enough. In this case set t_DHWHP_MAX to a minimum value (the suggested value is 60min), connect the circulating pump out of the unit to the unit if it is not already controlled by it, and add a 3-way valve at the inlet of the fan coil to ensure enough water flow. Also, it could be because TBH or AHS is not available. The heat pump will stay in DHW mode until t_DHWHP_MAX is reached or the setpoint is achieved. Add TBH or AHS for DHW mode, ensuring they are controlled by the unit.
R
rodriguezmarioSep 7, 2025
What to do if the water pressure relief valve leaks in CLIVET WSAN-YMi 81?
- C
  calvin22Sep 7, 2025
  If the water pressure relief valve on your CLIVET Air Conditioner is leaking, it may be due to dirt blocking the valve outlet. Check for correct operation of the pressure relief valve by turning the red knob on the valve counter clockWise. If you do not hear a clacking sound, contact your local dealer. In case the water keeps running out of the unit, close both the water inlet and outlet shut-off valves first and then contact your local dealer.

CLIVET WSAN-YMi 81 Specifications

General

Brand	CLIVET
Model	WSAN-YMi 81
Category	Air Conditioner
Language	English

Summary

Product Series Information

Product Line Specifications

Details product line sizes, nominal kW, and power supply types.

Safety Precautions and Warnings

General Safety Instructions

Covers DANGER, WARNING, CAUTION, NOTE symbols and general safety instructions.

General System Information

Antifreeze Function

Explains the freeze prevention mechanism using heat pump and backup heater.

Backup Heater System

Details the function, capacity, and integration of the backup heater.

Optional System Components

Information on connecting room thermostats, solar kits, and remote alarms.

Domestic Hot Water Tank Setup

Specifies requirements for connecting a domestic hot water tank.

Operating Conditions and Ranges

Cooling Mode Operation Parameters

Defines minimum leaving water temperature in cooling mode based on outdoor temperature.

Heating and DHW Mode Parameters

Outlines operating temperatures for heating and domestic hot water modes.

Dimensional Specifications

Unit Dimensions and Component Identification

Provides physical dimensions and identifies key internal components for installation.

Installation Procedures and Guidelines

Pre-Installation Checks and Handling

Details model confirmation, handling precautions, and installation requirements.

Installation Site Selection Criteria

Guidance on choosing appropriate installation locations considering ventilation and environment.

Site Considerations for Climate and Snow

Specific advice for hot climates, cold climates, and snow-prone areas.

Foundation, Drainage, and Servicing Clearances

Covers foundation, drainage, servicing clearances, and installation requirements.

Typical Application Scenarios

Application 1: Space Heating with Thermostat

Describes space heating with a connected room thermostat and circulation pump operation.

Application 2: Space Heating without Thermostat

Details space heating without a thermostat, with DHW provided via a tank.

Application 3: Cooling/Heating with Fan Coils

Covers cooling/heating with fan coils, including DHW from a tank.

Application 4: Cooling/Heating without Thermostat

Explains cooling/heating without a thermostat, using a user interface for ON/OFF control.

Application 5: Heating with Auxiliary Boiler

Describes heating modes with an auxiliary boiler, covering alternating and bivalent operations.

Application 6: Dual Setpoint Heating Control

Details dual setpoint control for floor heating and fan coils with different temperature requirements.

Application 7: Cooling/Heating with Dual Setpoints

Describes cooling/heating with dual setpoints for floor heating and fan coils via a mixing station.

Water Connection Guidelines

Water Quality and Hardness Requirements

Specifies water composition limits for corrosion and addresses water hardness and cleaning.

Hydraulic System Diagrams and Piping

Illustrates hydraulic layouts and covers water piping requirements and insulation.

Water Circuit Checks and Expansion Vessel Setup

Details checks for water pressure, temperature, and expansion vessel pre-pressure adjustments.

Anti-Freeze Protection and Glycol Use

Provides guidance on freeze protection using glycol solutions and their system implications.

Adding Water and System Corrosion Prevention

Details the process of adding water, glycol properties, and corrosion prevention methods.

Electrical Connections and Wiring Safety

General Wiring Safety and Precautions

Emphasizes safety rules, grounding, GFCI installation, and using qualified electricians.

Power Supply and Component Wiring

Details power supply wiring specifications, backup heater power, and component connections.

Wired Controller Installation and Mounting

Guides on installing and wiring the wired controller, including cover mounting.

Room Thermostat Wiring Methods

Explains three methods for connecting room thermostats based on application requirements.

Start-up and System Configuration

Key Terms and Climate Curve Settings

Defines technical terms and guides on selecting climate-related temperature curves.

Mode-Specific Temperature Curves (Heating/Cooling)

Presents temperature curves for HEATING, ECO, and COOLING modes based on outdoor conditions.

DIP Switch and Current Setting Configuration

Explains DIP switch functions for system parameters, heating sources, and current settings.

Initial Start-up, Powering, and Pump Speed Adjustment

Covers initial start-up, powering the unit, and adjusting pump speed for optimal operation.

Installer Menu (FOR SERVICEMAN) Usage

Guides on accessing and navigating the FOR SERVICEMAN menu for system configuration.

DHW, Cooling, and Heating Mode Configuration

Details configuration settings for DHW, cooling, and heating modes, including priorities and timings.

Additional Heating Source and Holiday Settings

Configures backup heaters, AHS, holiday modes, and service call information.

Test Run, Special Functions, and Auto Restart

Guides on performing test runs, using special functions, and configuring auto restart.

Service Information and Protocols

General Safety for Refrigerant Systems

Outlines safety checks for working with flammable refrigerants and equipment.

Refrigerant Handling and System Procedures

Details procedures for refrigerant removal, evacuation, charging, and decommissioning.

Equipment Labelling, Recovery, and Transport

Covers equipment labelling, refrigerant recovery, and transportation regulations.

Routine Maintenance Procedures

Essential Unit Checks and Water System Maintenance

Specifies checks for water pressure, filters, relief valves, and glycol concentration.

Backup Heater and DHW System Maintenance

Covers maintenance for backup heaters, DHW tanks, and booster heaters, including descaling.

Safety Valve Replacement and Unit Disassembly

Instructions for safety valve replacement and disassembling unit panels for access.

Trouble Shooting Guide

General Troubleshooting Guidelines and Symptoms

Provides general advice and initial checks for diagnosing unit problems and common symptoms.

Common Unit Operational Issues and Solutions

Addresses issues like incorrect settings, low water flow, and pump noise with corrective actions.

Performance and Mode Transition Troubleshooting

Solves problems with heating capacity, mode changes, and priority settings.

System Error Codes and Troubleshooting

Lists error codes (E0-HA, Pd-F1) and their corresponding failure causes and corrective actions.

General Technical Specifications

Electrical Specifications and Ratings

Details power supply, running current, and component specifications for units and backup heaters.

Electrical Schematics Diagrams

1-Phase Unit Wiring Diagrams

Wiring diagrams for 1-phase 5/7/9kW and 12/14/16kW units, showing component connections.

3-Phase Unit Wiring Diagrams

Wiring diagram for 3-phase 12/14/16kW units, illustrating system connections.

Refrigerant Cycle Diagram

Refrigerant Cycle Components Identification

Identifies all components within the refrigerant cycle diagram for system understanding.

Electronic Board Layouts

Main Control Board and Inverter Module Layouts

Shows layouts for main control boards and inverter modules across different unit types.

Backup Heater Control Components

Identifies control components for the backup heater in 1-phase and 3-phase units.

Modbus Mapping and Communication Protocol

Modbus Addressing and Controller Register Mapping

Defines Modbus addressing, communication specifications, and registers for wired controllers.

Unit Parameter Mapping via Modbus

Lists Modbus addresses for various unit parameters, running status, and fault codes.

Controller User Manual and Interface Navigation

Controller Interface Icons, Keys, and Home Pages

Explains interface icons, key functions, and different home page display configurations.

Menu Structure and Navigation Flow

Provides a visual representation of the controller's menu hierarchy and navigation paths.

Operating Mode and Temperature Configuration

Guides on setting ambient operating modes, default temperatures, and weather-based adjustments.

DHW, ECO Mode, and Scheduling Functions

Details DHW functions (Disinfect, Fast DHW), ECO mode, and setting time schedules.

Controller Options: Silent, Holiday, and Backup Heater

Covers configuration of silent mode, holiday away/home functions, and backup heater activation.

Child Lock and Service Information Access

Details the child lock function and how to access service information and error codes.

Controller Navigation Menu Overview

Menu Structure Flowchart

Visual representation of the controller's menu structure and navigation paths for accessing settings.

Declaration of Conformity (EC)

EC Directives and Standards Compliance

Lists EC directives and harmonized standards the machine complies with.

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CLIVET WSAN-YMi 81 User Manual

Table of Contents

Questions and Answers:

CLIVET WSAN-YMi 81 Specifications

Summary

Product Series Information

Product Line Specifications

Safety Precautions and Warnings

General Safety Instructions

General System Information

Antifreeze Function

Backup Heater System

Optional System Components

Domestic Hot Water Tank Setup

Operating Conditions and Ranges

Cooling Mode Operation Parameters

Heating and DHW Mode Parameters

Dimensional Specifications

Unit Dimensions and Component Identification

Installation Procedures and Guidelines

Pre-Installation Checks and Handling

Installation Site Selection Criteria

Site Considerations for Climate and Snow

Foundation, Drainage, and Servicing Clearances

Typical Application Scenarios

Application 1: Space Heating with Thermostat

Application 2: Space Heating without Thermostat

Application 3: Cooling/Heating with Fan Coils

Application 4: Cooling/Heating without Thermostat

Application 5: Heating with Auxiliary Boiler

Application 6: Dual Setpoint Heating Control

Application 7: Cooling/Heating with Dual Setpoints

Water Connection Guidelines

Water Quality and Hardness Requirements

Hydraulic System Diagrams and Piping

Water Circuit Checks and Expansion Vessel Setup

Anti-Freeze Protection and Glycol Use

Adding Water and System Corrosion Prevention

Electrical Connections and Wiring Safety

General Wiring Safety and Precautions

Power Supply and Component Wiring

Wired Controller Installation and Mounting

Room Thermostat Wiring Methods

Start-up and System Configuration

Key Terms and Climate Curve Settings

Mode-Specific Temperature Curves (Heating/Cooling)

DIP Switch and Current Setting Configuration

Initial Start-up, Powering, and Pump Speed Adjustment

Installer Menu (FOR SERVICEMAN) Usage

DHW, Cooling, and Heating Mode Configuration

Additional Heating Source and Holiday Settings

Test Run, Special Functions, and Auto Restart

Service Information and Protocols

General Safety for Refrigerant Systems

Refrigerant Handling and System Procedures

Equipment Labelling, Recovery, and Transport

Routine Maintenance Procedures

Essential Unit Checks and Water System Maintenance

Backup Heater and DHW System Maintenance

Safety Valve Replacement and Unit Disassembly

Trouble Shooting Guide

General Troubleshooting Guidelines and Symptoms

Common Unit Operational Issues and Solutions

Performance and Mode Transition Troubleshooting

System Error Codes and Troubleshooting

General Technical Specifications

Electrical Specifications and Ratings

Electrical Schematics Diagrams

1-Phase Unit Wiring Diagrams

3-Phase Unit Wiring Diagrams

Refrigerant Cycle Diagram

Refrigerant Cycle Components Identification

Electronic Board Layouts

Main Control Board and Inverter Module Layouts

Backup Heater Control Components

Modbus Mapping and Communication Protocol

Modbus Addressing and Controller Register Mapping

Unit Parameter Mapping via Modbus

Controller User Manual and Interface Navigation

Controller Interface Icons, Keys, and Home Pages