Safety Considerations; General; Heating Stage - Carrier Aquazone 50HQP Series Installation, Start-Up And Service Instructions Manual

• INSUFFICIENT VENTILATION ALARM
• RELATIVE HUMIDITY ALARM
• TIME SCHEDULES
• HOLIDAY SCHEDULES
• OVERRIDE SCHEDULES
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Water Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Condensate Drain Pans . . . . . . . . . . . . . . . . . . . . . . 43
Refrigerant System . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Condensate Drain Cleaning . . . . . . . . . . . . . . . . . . . 43
Air Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Condenser Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . 43
• GRAVITY FLOW METHOD
• FORCED CIRCULATION METHOD
Checking System Charge . . . . . . . . . . . . . . . . . . . . . 44
Refrigerant Charging . . . . . . . . . . . . . . . . . . . . . . . . . 44
Air Coil Fan Motor Removal . . . . . . . . . . . . . . . . . . . 44
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 44
Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
50HQP,VQP START-UP CHECKLIST . . . . . . . . . . CL-1
IMPORTANT: Read the entire instruction manual before start-
ing installation.

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified service personnel should install, repair, or
service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. All other operations
should be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit, and other safety
precautions that may apply.
Follow all safety codes, including ANSI (American National
Standards Institute) Z223.1. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire
extinguisher available for all brazing operations.
It is important to recognize safety information. This is the safety-
alert symbol . When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
Electrical shock can cause personal injury or death. Before
installing or servicing system, always turn off main power to
system. There may be more than one disconnect switch. Turn
off accessory heater power if applicable.
DO NOT USE TORCH to remove any component. System
contains oil and refrigerant under pressure.
To remove a component, wear protective gloves and goggles
and proceed as follows:
a. Shut off electrical power to unit.
b. Recover refrigerant to relieve all pressure from system
using both high-pressure and low pressure ports.
c. Traces of vapor should be displaced with nitrogen and
the work area should be well ventilated. Refrigerant in
contact with an open flame produces toxic gases.
d. Cut component connection tubing with tubing cutter and
remove component from unit. Use a pan to catch any oil
that may come out of the lines and as a gage for how
much oil to add to the system.
e. Carefully un-sweat remaining tubing stubs when neces-
sary. Oil can ignite when exposed to torch flame.
Failure to follow these procedures may result in personal inju-
ry or death.
DO NOT re-use compressor oil or any oil that has been ex-
posed to the atmosphere. Dispose of oil per local codes and
regulations. DO NOT leave refrigerant system open to air any
longer than the actual time required to service the equipment.
Seal circuits being serviced and charge with dry nitrogen to
prevent oil contamination when timely repairs cannot be com-
pleted. Failure to follow these procedures may result in dam-
age to equipment.
This Installation and Start-Up Instructions literature is for
Aquazone™ water source heat pump systems.
Water source heat pumps (WSHPs) are single-package vertically
or horizontally mounted units with a reversible refrigeration
cycle for year-round cooling and heating.
IMPORTANT: The installation of water source heat pump
units and all associated components, parts, and accessories
which make up the installation shall be in accordance with the
regulations of ALL authorities having jurisdiction and MUST
conform to all applicable codes. It is the responsibility of the
installing contractor to determine and comply with ALL appli-
cable codes and regulations.
2
WARNING
DANGER
CAUTION

GENERAL