Carrier ROOMTOP 50AH024-096 - Manual (Page 2)

2
Unit servicing is relatively simple since access to the con-
denser and evaporator motors, blowers, belt, and pulley is
gained through access panels located on the sides of the unit.
These panels may also be used for cleaning of condenser coils.
Unit side panels also provide access to control box and pres-
sure switches.
Refrigeration cycle components (e.g., compressor, filter
drier, etc.) can be serviced upon removal of the base unit from
the space.
INSTALLATION
The 50AH units are intended for indoor installation only.
Step 1 — Receive and Inspect Unit — Unpack and
check unit against shipping order. See Fig. 1 for model number
nomenclature. Inspect carefully for concealed shipping dam-
age. If unit is damaged or incomplete, file claim with transpor-
tation company and advise Carrier immediately.
Step 2 — Protect Unit from Damage — To main-
tain warranty, unit must be protected against theft and vandal-
ism and stored indoors at all times.
Step 3 — Provide Unit Support — Refer to Fig. 2-5
for unit dimensions. Refer to Table 1 for unit sizes and weights.
Each unit requires the following field-supplied items:
8 — threaded suspension rods (
3 /
8
-in.-16 SAE Grade 1
minimum), 4 additional rods are needed if the unit
has a factory-installed air-side economizer
8 — washers
8 — locknuts
Install the 8 field-supplied rods by suspending them from a
suitable ceiling support. Locate rods to mate with 8 outside cor-
ner rigging holes shown in Fig. 2-5. Unit center of gravity is
shown in Fig. 6.
The ceiling and ceiling supports of existing buildings may
require reinforcements; follow all applicable codes.
WARNING
Determine building alterations required to run piping, wir-
ing, and ductwork. Follow dimensional drawings carefully
for ductwork, piping locations, electrical wiring, and over-
all unit dimensions. Read all installation instructions before
starting installation.
Evaporator Configuration
Factory-Installed Options
50AH AC 048 5 – – – – 2 1 XX
50AH – Horizontal, Indoor
Single-Package Cooling Unit
Packaging
1 – Domestic
2 – Export
Voltage Description
5 – 208/230-3-60
6 – 460-3-60
Unit Size - Nominal Tons
024 – 2
036 – 3
048 – 4
Compressor Options
AC – Air Cooled
060 – 5
072 – 6
096 – 8
3 – 208/230-1-60
Condenser Configuration
Design Changes
2 – R-410A Original Design
Cabinet Type
S – Splittable*
– – Standard
Economizer and Hot Gas Options
A – Hot Gas Bypass†
B – Hot Gas Reheat†
– – None
C – Air-Side Economizer with Controls
E – Hot Gas Bypass and Air-Side Economizer†
F – Hot Gas Bypass, Air-Side Economizer, and
Hot Gas Reheat†
D – Hot Gas Bypass and Hot Gas Reheat†
G – Hot Gas Reheat and Air-Side Economizer†
B – Standard Motor with Alternate 2 Drive
A – Standard Motor with Alternate 1 Drive
– – Standard Motor with Standard Drive
E – Upgrade 1 Motor with Alternate 2 Drive
D – Upgrade 1 Motor with Alternate 1 Drive
C – Upgrade 1 Motor with Standard Drive
H – Upgrade 3 Motor with Alternate 2 Drive
G – Upgrade 2 Motor with Alternate 2 Drive
F – Upgrade 2 Motor with Alternate 1 Drive
B – Standard Motor with Alternate 1 Drive
A – Standard Motor with Standard Drive, Flooded Condenser
– – Standard Motor with Standard Drive
E – Upgrade 1 Motor with Alternate 3 Drive
D – Upgrade 1 Motor with Alternate 2 Drive
C – Upgrade 1 Motor with Alternate 1 Drive
H – Upgrade 2 Motor with Alternate 3 Drive
G – Upgrade 2 Motor with Alternate 2 Drive
F – Upgrade 2 Motor with Alternate1 Drive
J – Standard Motor with Alternate 1 Drive, Flooded Condenser
M – Upgrade 1 Motor with Alternate 3 Drive, Flooded Condenser
L – Upgrade 1 Motor with Alternate 2 Drive, Flooded Condenser
K – Upgrade 1 Motor with Alternate 1 Drive, Flooded Condenser
Q – Upgrade 2 Motor with Alternate 3 Drive, Flooded Condenser
P – Upgrade 2 Motor with Alternate 2 Drive, Flooded Condenser
N – Upgrade 2 Motor with Alternate1 Drive, Flooded Condenser
* Includes interconnecting kit and electrical box.
†Not available with splitable units. a50-8546
Fig. 1 — Model Number Nomenclature