Carrier 50SZ Series Product Data

50SZ
Single---Packaged 13 SEER Heat Pump System
1 and 3 Phase --- 2 to 5 Nominal Tons (024---060)
Unit 50SZ
Single- -Package Heat Pump for Residential and Light Commercial
Applications
S Low Sound Levels
S 13 SEER

FEATURES/BENEFITS

One- -piece heat pump with optional electric heater, low installation
cost, dependable performance and easy maintenance.

Efficient operation

High- -efficiency design with SEERs (Seasonal Energy Efficiency
Ratios) of 13.0 and HSPFs (Heating Seasonal Performance Factors)
of up to 7.7.

Easy Installation

Factory- -assembled package is a compact, fully self- -contained,
heat pump unit that is pre- -wired, pre- -piped, and pre- -charged for
minimum installation expense. 50SZ units are available in a variety
of standard capacity ranges with voltage options to meet residential
and light commercial requirements. Units install easily on a rooftop
or at ground level.

Product Data

Durable, dependable components

Scroll compressors are designed for high efficiency. Each com-
pressor is hermetically sealed against contamination to help pro-
mote longer life and dependable operation. Vibration isolation pro-
vides quiet operation. Compressors have internal high- -pressure and
overcurrent protection.
Direct- -drive multi- -speed, PSC (permanent split capacitor)
blower motor is standard on all 50SZ models.
Direct- -drive, PSC condenser- -fan motors are designed to help re-
duce energy consumption and provide for cooling operation down
to 40_F (4.4_C) outdoor temperature. MotormasterR II low ambi-
ent kit is available as a field- -installed accessory and does not require
a special motor.
Corporate thermostats work with Carrier's small packaged prod-
ucts as a system to promote year round comfort.
Refrigerant system is designed to provide dependability. Liquid
refrigerant strainers are used to promote clean, unrestricted opera-
tion. Each unit leaves the factory with a full refrigerant charge. Re-
frigerant service connections make checking operating pressures
easier.
Low- -Pressure/Loss- -of- -Charge Switch assures added safety and
reliability for the compressor.
C99001
Indoor and outdoor coils are computer- -designed for optimum
heat transfer and cooling efficiency. The indoor coil is fabricated
from copper tube and aluminum fins and is located inside the unit
for protection against damage. The outdoor coil is internally
mounted on the top tier of the unit. A FIOP (Factory- -Installed Op-
tion) metal louvered grille is available on all models. Copper fin
coils and pre- -coated fin coils are available from the factory by spe-
cial order. These coils are recommended in applications where alu-
minum fins are likely to be damaged due to corrosion. They are ideal
for seacoast applications.
Low sound ratings ensure a quiet indoor and outdoor environment
with sound ratings as low as 72 dBA. (See page 3.)
Easy to service cabinets provide easy single- -panel accessibility to
serviceable components during maintenance and installation. The
unit base, with integrated drain, provides easy ground level installa-
tion with or without a mounting pad. Convenient handholds are pro-
vided to manipulate the unit on the job site. A nesting feature ensures
a positive unit base to roof curb seal when the unit is roof mounted.
A convenient 3/4- -in. wide perimeter flange makes frame mounting
on a rooftop easy.
Downflow operation is easily provided in the field to allow vertical
Ductwork connections. The unit base utilizes knockout style seals
on the bottom openings to ensure a positive seal in the horizontal air-
flow mode.
Standard metal duct covers with insulation come with the unit and
cover the duct openings. These can be left in place if the units are
converted to downshot.
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