In Ange-Gardien, a FUJITSU installation where positioning, leveling, and winter preparation matter just as much as the machine
For this installation in Ange-Gardien, we installed a FUJITSU AIRSTAGE ORION XLTH+ wall-mounted heat pump with R-32, a series designed to maintain heating capacity when outdoor temperatures become particularly low.
The photograph taken during our work shows a detail that is not always visible in final photos: the spirit level is still placed directly on the outdoor unit. It is not a decorative accessory. It illustrates an important part of our work method at AirGreen: before considering equipment properly installed, we verify its positioning, alignment, supports, and all the surrounding connections.
For this HVAC installation in Ange-Gardien, the FUJITSU outdoor unit was mounted on metal brackets secured to the foundation wall, rather than being placed directly on the ground. It is raised high enough to leave clearance beneath the chassis, which is especially important in Quebec when snow, ice, and water from defrost cycles must be taken into account.
To the left of the heat pump, you can also see the outdoor electrical disconnect, installed near the equipment. The result is a compact, accessible setup without placing the unit in the middle of the yard.
FUJITSU ORION XLTH+: a heat pump designed for heating in very cold climates
The name XLTH+ makes perfect sense when you examine this series’ features.
FUJITSU’s technical documentation indicates that the Orion XLTH+ models covered by this series can operate in heating mode down to -30 °C (-22 °F). The outdoor unit also uses an Inverter compressor and includes a base pan heater designed for extremely cold climates.
For a property located in Ange-Gardien, the ability to continue heating when temperatures fall well below zero is much more relevant than a simple comparison of nominal BTU capacity.
A heat pump used in Quebec must contend with several realities:
- significant temperature differences between seasons;
- high heating demand in January and February;
- defrost cycles;
- the possible accumulation of snow around the outdoor unit;
- humid periods when frost forms quickly on the coil;
- cooling and dehumidification needs during the summer.
That is precisely why we analyze more than the capacity listed on a quote.
Three capacities in the range, with different performance levels
The FUJITSU specifications provided cover three main configurations in the series:
- 09KTAP1: 9,000 BTU/h nominal cooling capacity
- 12KTAP1: 12,000 BTU/h nominal cooling capacity
- 15KTAP1: 14,500 BTU/h nominal cooling capacity
In heating mode, the listed nominal capacities are 12,000, 15,300, and 17,400 BTU/h, respectively. The maximum available capacity is even higher under certain conditions: up to 24,000 BTU/h for the 09KTAP1, 27,300 BTU/h for the 12KTAP1, and 28,000 BTU/h for the 15KTAP1.
This modulation is linked to Inverter technology, which allows the compressor to adjust its operation according to the actual load rather than operating exclusively according to an on-off logic.
For the homeowner, this can translate into more consistent comfort when the equipment is properly sized.
The energy efficiency of the ORION XLTH+
The range also offers particularly attractive efficiency ratings.
The documentation indicates a TRÉS2 of 33.5 for the 9,000 BTU model, 31.5 for the 12,000 BTU model, and 28.7 for the 15,000 BTU model in the series. The three configurations shown are also identified in the specifications as ENERGY STAR, ENERGY STAR Cold Climate, and ENERGY STAR Most Efficient.
For us, these values are used to compare systems on a technical basis, but they never replace building sizing.
A highly efficient heat pump may operate less efficiently in practice if it is:
- significantly oversized;
- installed in an area with poor airflow;
- connected to incorrect piping;
- improperly configured;
- installed with inadequate condensate drainage;
- exposed to excessive snow accumulation.
The performance of a wall-mounted heat pump therefore depends as much on the quality of the product as on the quality of its installation.
What this AirGreen installation in Ange-Gardien clearly demonstrates
An outdoor unit installed above ground
The first visible element in the photo is the height of the outdoor unit.
We used metal wall brackets secured to the lower part of the building. The machine does not rest on the lawn or directly on the ground.
This configuration provides several important benefits.
Reducing the risks associated with snow accumulation
A heat pump must be able to move a significant amount of air through its heat exchanger. When a unit is installed too low, heavy snow accumulation can reduce the necessary clearances around the condenser.
By raising the unit, we increase the available clearance before the snow reaches the base of the machine.
This does not, of course, relieve the owner of the responsibility to keep a reasonably clear space around the heat pump after a major storm, but choosing the installation height is already a first preventive measure.
Facilitating drainage during defrost cycles
In heating mode, frost may form on the outdoor heat exchanger. The heat pump then initiates a defrost cycle to clear the heat exchanger.
This process produces water.
On a unit installed too close to the ground, this water can freeze beneath the appliance and gradually form a mass of ice. Sufficient space beneath the condenser helps manage this situation more effectively.
The ORION XLTH+ series is also equipped, according to FUJITSU, with a base pan heater designed for extremely cold climates.
The level visible on the unit: a simple but essential check
In this photo from Ange-Gardien, the spirit level placed on top of the condenser shows a very practical step in our installation process.
An outdoor heat pump must be properly installed on its supports. We check the alignment before finalizing the installation.
Why?
Because an inclined or unstable installation can make the following more difficult:
- water drainage;
- chassis stability;
- vibration management;
- the appearance of the installation;
- long-term maintenance.
Sometimes, the simplest checks prevent the most unnecessary problems.
An installation against lightweight exterior siding requires a sound attachment strategy
The photographed building has light-colored horizontal exterior siding above the foundation.
When we install a heat pump on a building of this type, we do not consider the siding itself to be a structural element. The attachment must be designed to support the weight of the unit and the vibrations associated with the operation of the compressor and fan.
In this project, the supports are installed in the lower section of the wall, keeping the condenser compactly positioned against the building while leaving the necessary space underneath.
The electrical disconnect is installed nearby
To the left of the FUJITSU unit, we can see the electrical disconnect box.
This component makes it possible to disconnect the unit’s power supply for certain service and maintenance work. Having it near the outdoor unit facilitates technical access.
The required power supply varies according to the heat pump’s capacity.
FUJITSU documentation specifies a 208 to 230 V, 60 Hz, single-phase power supply for the three models shown. The specified circuit breaker is 15 A for the 09KTAP1, then 20 A for the 12KTAP1 and 15KTAP1 models.
That is why electrical requirements must never be determined solely based on a habit formed with an older heat pump model. We must always refer to the equipment actually installed.
1/4 in. and 3/8 in. refrigerant lines
Another important technical detail of this series concerns the dimensions of the lines.
FUJITSU specifies, for the three capacities shown:
- liquid: 1/4 in.
- gas: 3/8 in.
The specified minimum piping length is 10 feet, while the maximum length reaches 66 feet. The maximum permitted vertical difference is 49 feet.
These figures are particularly useful when we are preparing a project in which the indoor unit is far from the best possible outdoor location.
They also show why we never decide by eye whether existing piping can be kept when replacing a wall-mounted air conditioner or heat pump.
We check:
- the diameter;
- the length;
- the condition of the copper;
- the route;
- compatibility with the new refrigerant and new equipment;
- the quality of the connections.
R-32 also changes the way we approach installation
The logo R32 is clearly visible on the front panel of the unit installed in Ange-Gardien.
FUJITSU indicates a global warming potential of 675 for R-32, compared with 2,088 for R-410A, representing an announced reduction of 68%.
R-32 nevertheless belongs to the A2L category. For an HVAC company, this means complying with the methods and procedures applicable to this type of refrigerant.
It is therefore not enough to replace an old heat pump with a new unit and assume that the practices are identical.
Exceptionally quiet indoor operation
The ORION XLTH+ series is also designed to limit indoor noise levels.
Depending on the capacity:
- the 09KTAP1 and 12KTAP1 models can go down to 23 dB(A) in quiet mode;
- the 15KTAP1 goes down to 26 dB(A).
The indoor unit offers several fan speeds as well as a quiet operating mode. The documentation also mentions ProCore copper indoor coils with high corrosion resistance.
This quiet operation becomes particularly relevant when the wall-mounted unit is located in a bedroom, living room, office, or open-concept area where the unit operates for several hours.
Integrated Wi-Fi for everyday control
FUJITSU also indicates integrated Wi-Fi connectivity, with remote monitoring and control using the AIRSTAGE app.
The homeowner can therefore manage certain system functions more easily without having to remain in front of the wall-mounted remote control.
For more complex applications, the documentation also mentions integration possibilities with various controllers and interfaces, including BACnet and Modbus with the appropriate accessories.
Subsidies and eligibility: always verify the exact pairing
The ENERGY STAR rating of this series may make certain configurations appealing in the context of financial assistance programs available in Quebec.
However, at AirGreen, we always prefer to verify the exact model number of the indoor unit, outdoor unit, and recognized pairing before announcing a subsidy amount.
The documented range includes, among others:
- ASUH09KTAS with AOUH09KTAP1;
- ASUH12KTAS with AOUH12KTAP1;
- ASUH15KTAS with AOUH15KTAP1.
This check prevents basing a purchasing decision on a subsidy estimate that corresponds to a different configuration.
The mistakes we seek to avoid with a wall-mounted heat pump in Ange-Gardien
A good machine cannot automatically correct a poor installation.
Among the points we monitor particularly closely:
-
An outdoor unit installed too low
Quebec's climate requires planning for snow before winter arrives. -
Improperly leveled supports
The control visible in the photo from Ange-Gardien is part of the essential checks. -
Insufficient service access
The panels and connections must remain accessible. -
Piping selected without consulting the specifications
For this series, FUJITSU requires 1/4 in. liquid and 3/8 in. gas lines. -
Sizing based solely on square footage
A residence must be assessed based on its heat loss, insulation, windows, and layout. -
An improvised electrical supply
The circuit amperage must precisely match the installed configuration. -
A final installation without mechanical inspection
Position, stability, and level must be checked before leaving the job site.
An installation that clearly demonstrates how we work at AirGreen
This FUJITSU ORION XLTH+ heat pump installation project in Ange-Gardien is not spectacular because it involves piping spanning several floors or an installation on a difficult-to-access roof.
Its value lies precisely in the details.
A properly elevated unit. Aligned supports. A level check. An electrical disconnect installed nearby. Clear access in front of the fan. An outdoor unit installed compactly against the building.
These are the elements that turn equipment that performs well on paper into a cohesive HVAC system once installed.
We apply the same approach to our wall-mounted heat pump installations in Montreal, Laval, Longueuil, the North Shore, and the South Shore: understanding the building before deciding where to install the unit, meeting the manufacturer's technical requirements, and considering from day one the conditions the equipment will have to withstand several years later.
With the FUJITSU AIRSTAGE ORION XLTH+, performance down to -30 °C, the Inverter compressor, R-32, the integrated base-pan heater, low noise levels, and high efficiency provide a solid technical foundation. Our job then is to ensure that the installation lives up to the equipment.