Carrier 50HQ - Manual

Number One
AirConditbning
Maker
Carrier Parkway • Syracuse NY 13221
Sing le-Package
Water-Source Heat Pumps
INDEX
Page
SAFETY CONSIDERATIONS...........................1
INSTALLATION............................................... 1-5
Step 1 — Check Equipment and
Jobsite .............................................................. 1
• UNPACKAGE UNIT
• INSPECT EQUIPMENT
• COMPLETE OR CONSIDER THESE
SYSTEM REQUIREMENTS
Step 2 — Connect Supply Ductwork..............2
Step 3 — Make Piping Connections.............. 3
• CONNECT WATER SUPPLY AND
RETURN LINES
• INSTALL BALANCING VALVES
Page
MAKE CONDENSATE DRAIN
LINE CONNECTION
Step 4 — Make Electrical Connections... 4
• INSTALL A BRANCH CIRCUIT
DISCONNECT PER NEC
• BRING POWER LEADS INTO UNIT
• CONNECT GROUND LEAD TO
GROUND LUG IN SPLICE BOX
• SET FAN MOTOR SPEED
• CONNECT CONTROL POWER WIRING
START-UP......................................................... 6
SERVICE...................................................................7
#
SAFETY CONSIDERATIONS
Installation and servicing of air conditioning
equipment can be hazardous due to system pressure
and electrical components. Only trained and quali­
fied service personnel should install, repair or
service air conditioning equipment.
Untrained personnel can perform basic mainten­
ance functions of cleaning coils and cleaning 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. Wear safety glasses and,
work gloves. Use quenching cloth for brazing
operations. Have fire extinguishers available for all
brazing operations.
WARNING: Before performing service or
maintenance operations on system, turn off
main power switch to indoor unit and outdoor
unit. Turn off accessory heater power switch if
applicable. Electrical shock could cause per­
sona! injury.
INSTALLATION
Step 1 — Check Equipment and Jobsite
UNPACKAGE UNIT — Move to final location.
Slide from carton taking special care not to damage
service valves or grilles.
INSPECT EQUIPMENT — File claim with ship­
ping company if shipment is damaged or incomplete.
COMPLETE OR CONSIDER THESE SYSTEM
REQUIREMENTS before installation:
a.
b.
c.
d.
e.
Consult local building codes and National Elec­
trical Code (NEC) for special installation
requirements.
Consider type of water source. Ensure there is an
adequate supply of water at temperature of 60 F
to 90 F with minimum pressure of 10 psig.
Provide sufficient space for water piping, con­
densate drain, wiring and servicing unit. See
Fig. 1. When front (external) water piping
connections are used, locate unit so piping does
not block front access panels. (Units installed in
confined areas may have to be removed for major
servicing such as compressor or fan motor
replacement.)
Provide a minimum 6-in. clearance between
return air filter and adjacent wall.
Mount unit on floor or solid platform so unit is
elevated. (The 50HQ units can be suspended
from ceiling. See “f’ below.) Make sure unit is
supported from the bottom. To reduce sound
transmission, especially when unit is located in a
closet or utility room having louvered doors, the
following acoustical treatment is recommended:
place an isolation pad under unit. Pad must be
same size as unit base. Construct a 1-in. fiberglass
sound shield in front of unit.
© Carrier Corporation 1981 Form 50HQ,VQ-1SI