Rinnai EHPS265VM - User Manual

The Rinnai Enviroflo Hot Water Heat Pump is a hot water system designed primarily for residential outdoor installations, though internal installation in unoccupied, well-ventilated spaces is possible, provided it meets AS/NZS 5149 requirements for flammable refrigerants. It is not suitable for spa, swimming pool, or hydronic applications. The system uses R290 (propane) refrigerant, a flammable gas, and must be handled by licensed refrigeration mechanics.

Function Description

The Enviroflo operates as a heat pump, utilizing a highly efficient micro-channel heat exchanger wrapped around an inner cylinder. A temperature sensor within the cylinder controls the heat pump's operation to maintain a suitable water temperature. In ambient weather conditions unsuitable for heat pump operation, an electric element provides backup heating to ensure a continuous supply of hot water. The system is factory preset to 'Standard' mode, continuously heating water to 60 °C.

The heat pump includes an electronic expansion valve (EEV), an evaporator, filters, a high-pressure switch, a 4-way valve, and a compressor. Air is drawn in through the air intake and discharged through the air outlet. The system also features three anode rods, a temperature sensor sleeve pipe, a water temperature sensor, and a heating element.

Usage Features

The device is controlled via a display and control panel.

On/Off: A brief press turns the unit on or off. Holding for five seconds locks or unlocks the controller, accompanied by a beep. If no button is pressed for 60 seconds in normal display mode, the controller automatically locks.
Clock Setting: Pressing the clock button enters clock setting mode, allowing adjustment of hours and minutes using the up/down buttons. Holding the clock button for three seconds enables or disables timers. If no button is pressed for one minute during clock setting, the current setting is confirmed, and the system returns to the home page.
Modes of Operation:
- Standard (St:AN): Factory preset, only the heat pump operates, maintaining a default water set temperature of 60 °C (range 15-60 °C). The system initiates reheating when the water temperature drops 10 °C below the set temperature.
- Economy (E:CO): Only the heat pump operates, with a default water set temperature of 55 °C (range 15-60 °C). Reheating initiates when the water temperature drops 10 °C below the set temperature.
- Hybrid (HY:b): The heat pump runs until the water reaches 60 °C, then stops. The electric heating element continues to heat the water to the set temperature (if higher than 60 °C). The default water set temperature is 65 °C (range 15-70 °C), with reheating initiating when the water temperature drops 10 °C below the set temperature.
- Electric (E:LE): Only the electric heating element operates to heat the water. The default water set temperature is 65 °C (range 15-70 °C), with reheating initiating when the water temperature drops 10 °C below the set temperature.
Boost Mode: To quickly heat water to the set temperature, press the 'M' and down buttons together for more than three seconds when the heat pump is ON in normal display mode. The heating element symbol will flash for one second and then stay on. The heating element turns off once the set temperature is reached.
Water Temperature Setting: Unlock the controller and use the up or down buttons to adjust the water temperature settings.
Timers: The system supports three on/off timer periods. Timers are useful for specific operating schedules, though the system modulates to maintain temperature normally. Timers can be set for weekly cycles (weekday function enabled) or daily cycles (weekday function disabled). To enable/disable timers, press and hold the clock button for three seconds.
Disinfection Cycle: The system has an auto disinfection cycle to meet New Zealand Building Code requirements for legionella bacteria. If the water temperature is below 70 °C for seven days, the heat pump (with the electric element) will start disinfection, heating water to 70 °C and maintaining 65-70 °C for at least 30 minutes. If 70 °C is not reached, it runs for two hours. A manual disinfection cycle can be initiated by pressing the On/Off and down buttons together for more than five seconds when the heat pump is ON in normal display mode.
Forced Defrost: When the fan coil unit temperature reaches -5 °C, the hot discharge bypass defrosting mode operates for 15 minutes or until the evaporator temperature reaches 5 °C. A forced defrost can be activated or deactivated by pressing the 'M' and down buttons together for more than five seconds when the heat pump is ON in normal display mode.
Ventilation Mode: When power is on, press and hold the two buttons (up and down) for five seconds to enter ventilation mode. To run in high speed, press the two keys for three seconds. To run in low speed, press the two keys again for three seconds. To exit, press and hold the keys again for three seconds.
Refrigerant Recovery: When the heat pump is not running, press and hold the two buttons (up and down) for ten seconds to enter refrigerant recovery. Press the On/Off button to exit.
Factory Settings Restore: Within five minutes of powering on, and without the heat pump running, press and hold all four keys (On/Off, M, up, down) for five seconds to restore factory settings.

Maintenance Features

Installation and Service: Must be carried out by a licensed tradesperson.
Safety Devices: The water heater is fitted with a combination Temperature & Pressure Relief (TPR) Valve, and one thermostat and one over-temperature control for each heating element. These must not be tampered with or removed.
Over-temperature Cut-out: If activated, it indicates a dangerous situation and must only be reset by an authorized person after inspection and service.
Water Filling: The cylinder must be full of water before energizing the system to prevent damage to the element and sensors.
Unit Handling: Move and position the unit using the two handholds on either side of the cylinder section. Do not tilt more than 45° from vertical to prevent compressor lubrication issues.
Pipe Work: All hot water pipe work should be insulated. A strainer must be installed to prevent debris from blocking the non-return valve.
Condensate Drain Line: A condensate drain line must be fitted, plumbed into a condensate drain and gully trap, and should not exceed 9 m in length.
Water Quality: The system requires water quality to meet specific standards (AS/NZS 3500.4 and G12/AS1) and be within defined impurity limits. Water quality outside these limits will void the warranty.
Filtration: If water contains discolouration, debris, or silt, an inline filter must be fitted and periodically replaced to protect copper and prevent pitting.
Stagnation: To prevent corrosion, systems not in use should be flushed on an eight-week cycle.
Electrical Connections: Must be carried out by a qualified person according to AS/NZS 3000 Wiring Rules. The appliance requires an independent, fused AC 230 V 50 Hz power supply with an isolating switch.
Insulation Tests: When performing insulation tests (Megger 550 V), tests must only be conducted across the active terminal to earth and then across the neutral terminal to earth. Tests between active and neutral terminals must not be performed.
Accessibility: All components, including the pressure and TPR valve and access covers, must be accessible for service and removal. Rating plates must be readable.
Error Codes: The controller displays error codes for various faults (e.g., high pressure, communication, sensor faults, lack of refrigerant). The PCB controller also uses flashing LED indicators for faults, which requires removal of covers and should only be handled by qualified service providers with appropriate refrigerant handling licenses.
Run Parameter Query: A menu accessible by pressing the up and down buttons together for three seconds allows querying various system parameters (e.g., fluorine/water cycle, pressure switch status, temperatures, fan speeds, heating element status).

Rinnai EHPS265VM Specifications

General

Model	EHPS265VM
Heating Capacity	26, 500 BTU/h
Cooling Capacity	25, 000 BTU/h
Refrigerant	R410A
Power Supply	208/230V, 1 phase, 60Hz

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