Pre- -Start- -Up; Start- -Up; Check For Refrigerant Leaks - Carrier 50SD030 Installation Instructions Manual

UNIT SIZE
NOMINAL CAPACITY (ton)
OPERATING WEIGHT (lb.)
COMPRESSOR
REFRIGERANT (R- -22) Quantity (lb.)
REFRIGERANT METERING DEVICE
ORIFICE OD (in.)
OUTDOOR COIL
Rows...Fins/in.
Face Area (sq. ft.)
OUTDOOR FAN
Nominal Cfm
Diameter
Motor HP (RPM)
INDOOR COIL
Rows...Fins/in.
Face Area (sq. ft.)
INDOOR BLOWER
Nominal Airflow (Cfm)
Size (in.)
Motor HP (RPM)
RETURN- -AIR FILTERS (IN.)*
Throwaway
*Required filter sizes shown are based on the larger of the ARI (Air Conditioning and Refrigeration Institute) rated cooling airflow or the heating airflow velocity
of 300 ft/minute for throwaway type. For permanent filters, follow filter manufacturer's recommendations for filter size based on allowable face velocity. Air filter
pressure drop for non ---standard filters must not exceed 0.08 in. wg.
SIZE 024
Cfm 800

PRE- -START- -UP

WARNING
!
FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death and/or property damage.
1. Follow recognized safety practices and wear protective
goggles when checking or servicing refrigerant system.
2. Relieve and recover all refrigerant from system before
touching or disturbing anything inside terminal box if
refrigerant leak is suspected around compressor terminals.
3. Never attempt to repair soldered connection while
refrigerant system is under pressure.
4. Do not use torch to remove any component. System
contains oil and refrigerant under pressure.
5. To remove a component, wear protective goggles and
proceed as follows:
a. Shut off electrical power to unit and install lockout
tag.
b. Relieve and reclaim all refrigerant from system
using both high- - and low- -pressure ports.
c. Cut component connecting tubing with tubing
cutter and remove component from unit.
d. Carefully unsweat remaining tubing stubs when
necessary. Oil can ignite when exposed to torch
flame.
Proceed as follows to inspect and prepare the unit for initial start- -up:
1. Remove all access panels.
2. Read and follow instructions on all DANGER, WARNING,
CAUTION, and INFORMATION labels attached to, or
shipped with unit.
3. Make the following inspections:
a. Inspect for shipping and handling damages, such as
broken lines, loose parts, disconnected wires, etc.
Table 1—Physical Data- -Unit 50SD
024
2
289
7.8
0.065
2...21
11.9
2700
22
1/8 (825)
3...17
3.7
800
10x10
1/3 (1050)
20x24x1
Table 2—Minimum Airflow for Safe Electric Heater Operation (Cfm)
030
1000
030 036
2--1/2 3
312 371
Scroll
8.4 10.9
AccuRater
0.070 0.080
2...21 2...21
13.6 15.5
2700 2800
22 22
1/8 (825) 1/8 (825)
3...17 3...17
3.7 4.7
1000 1200
10x10 11x10
1/3 (1050) 1/2 (1000)
20x24x1 24x36x1
036 042
1200 1400
b. Inspect for oil at all refrigerant tubing connections and on
unit base. Detecting oil generally indicates a refrigerant
leak. Leak test all refrigerant tubing connections using
electronic leak detector, or liquid- -soap solution. If a
refrigerant leak is detected, see following Check for
Refrigerant Leaks section.
c. Inspect all field- - and factory- -wiring connections. Be
sure that connections are completed and tight.
d. Ensure wires do not touch refrigerant tubing or sharp
sheet metal edges.
e. Inspect coil fins. If damaged during shipping and
handling, carefully straighten fins with a fin comb.
4. Verify the following conditions:
a. Make sure that outdoor fan blade is correctly positioned
in fan orifice (See Fig. 12).
b. Make sure that condensate drain pan and trap are filled
with water to ensure proper drainage.
c. Make sure that all tools and miscellaneous loose parts
have been removed.
MOTOR
1/8" MAX BETWEEN
MOTOR AND FAN HUB
Fig. 12 - - Fan Blade Clearance

CHECK FOR REFRIGERANT LEAKS

Proceed as follows to locate and repair a refrigerant leak and to
charge the unit:
10
042 048
3--1/2 4
398 418
10.9 12.3
®
0.088 0.088
2...21 2...21
19.4 19.4
2800 3300
22 22
1/8 (825) 1/4 (1100) 1/4 (1100)
3...17 3...17
4.7 5.6
1400 1600
11x10 11x10
1/2 (1075) 1/2 (1075) 1.0 (1040)
24x36x1 24x36x1 24x36x1
048 060
1600 1750
FAN GRILLE
1/2ý
MOTOR SHAFT

START- -UP

060
5
430
12.0
0.101
2...21
19.4
3300
22
4...17
5.6
1750
11x10
C99009