Installation, Operation, and Maintenance Manual
CA Series Heat Pumps - 8733851021 (2025/04) US
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17 Maintenance
WARNING
Personal injury hazard!
Servicing of this equipment can be hazardous due to system pressure and electrical
components. Only trained and qualified personnel should install, repair, or service
the equipment.
DANGER
Electric shock!
Before performing service or maintenance operations on the system, turn OFF
main power to the unit. Electrical shock will cause personal injury or death.
17.1 Filter Cleaning
Filter cleaning is required at regular intervals. The time period between filter
cleaning will depend upon type of environment where the equipment is used. In a
single-family home that is not under construction, cleaning the filter every 60 days
is sufficient. In other applications such as motels where daily vacuuming produces
a large amount of lint, filter cleaning may need to be as frequent as bi-weekly.
NOTICE
Product damage!
NOTICE
Equipment should never be used during construction due to likelihood of wall board
dust accumulation in the air coil of the equipment that permanently affects the
performance and may shorten the life of the equipment.
17.2 Annual Checkup
An annual “checkup” by a trained and qualified HVAC mechanic is required.
Complete the check-out sheet on page 44 when performing the annual
maintenance checkup. Record the performance measurements of volts, amps,
and water temperature differences for both heating and cooling. This data should
be compared to the information on the unit’s data plate and the data taken at the
original startup of the equipment.
17.3 Annual Condensate Drain Cleaning
Clean and flush the condensate drain annually to ensure proper drainage.
17.4 Handling Periodic Lockouts
Periodic lockouts almost always are caused by air or water flow problems. The
lockout (shutdown) of the unit is a normal protective measure in the design of the
equipment. If continual lockouts occur call a mechanic immediately and have them
check for:
• water flow problems
• water temperature problems
• air flow problems, or
• air temperature problems
Use of the pressure and temperature charts for the unit may be required to properly
determine the cause.
18 Servicing and Repair Information
18.1 Confined Space Work
Work in confined spaces must be avoided.
18.2 Controlled Work Procedure
All work must be undertaken under a controlled procedure to minimize the risk of a
flammable gas or vapor being present while the work is being performed.
18.3 Safety Checks
Prior to beginning work on systems containing flammable refrigerants, safety
checks are necessary to ensure that the risk of ignition is minimized. The following
precautions must be taken prior to conducting work on the refrigerating system.
18.3.1 Inform Everyone in the General Work Area
All maintenance staff and others working in the local area must be instructed on the
nature of work being carried out.
18.3.2 Check for the Presence of Refrigerant
The area must be checked with an appropriate refrigerant detector prior to and
during work, to ensure the technician is aware of potentially toxic or flammable
atmospheres. Ensure that the leak detection equipment being used is suitable for
use with R-454B refrigerant; i.e., non-sparking, adequately sealed, or intrinsically
safe.
18.3.3 Fire Extinguisher
If any hot work is to be conducted on the refrigerating equipment or any associated
parts, appropriate fire-extinguishing equipment must be available on hand. Have a
dry powder or CO
2
fire extinguisher adjacent to the charging area.
18.3.4 Ignition Sources
Ensure the following prior to the work taking place:
1. The area around the equipment is to be surveyed to make sure that there are
no flammable hazards or ignition risks.
2. "No Smoking" signs must be posted.
3. All possible ignition sources, including cigarette smoking, must be kept
sufficiently far away from the site of installation, repair, removal, or disposal
during which refrigerant may possibly be released and exposed to the
surrounding area and the ignition sources.
4. Ensure that any person carrying out work in relation to a refrigerating
system that involves exposing any pipe work knows that they must NOT use
any sources of ignition in such a manner that it may lead to the risk of fire or
explosion.
18.3.5 Ventilated Area
Ensure that the area is in the open or that it is adequately ventilated before breaking
into the system or conducting any hot work. The ventilation must safely disperse
all released refrigerant, preferably expelling it externally into the atmosphere. The
ventilation must be present during the period that the work is carried out.
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