Carrier 38HD018 - Safety Relief and Electrical Connections; Safety Relief Plug; Power Wiring Instructions

Table 2 — Physical Data
UNIT 38HD 018 024
030
036
048
060
OPER WT (lb), 1 ph/3 ph
148/*
160/*
171/* 240/226
244/235
244/235
REFRIGERANT
I R-22
COMPRESSOR
Model
Oil (pts), initial/recharge
Crankcase Heater Watts
Tecumseh
AW5519
32/30
Tecumseh
AW5524
32/30
Hermetic
Carlyle 1 Carlyle 1
J30 | J36 1
46/44
40
1 Carlyle
| J48
Copeland
CRP5-0450
70/66
CONDENSER AIR FAN 1
Number — Rpm
Diameter (in.) — no. blades
Fan Pitch
Motor Hp (NEMA)
Nominal Cfm
18 — 3
25 | 27
Vs
1835 | 1720 |
Propeller, C
1 —
j 1750
>irect Drive
850
24 — 3
24
%
3900
CONDENSER COIL
Rows
Face Area (sq ft)
Fins/in.
Vh
i .
61
2
1
15
1 2 |
12.3
! 2
CONNECTIONS
Suction (in.), Sweat
Liquid (in.), Flare
% I
i % i
%
7 /s
LINE SIZES
Suction
Liquid
%
i %
%
| m
CONTROLS
Pressurestat Settings
Ui/lh Cutout
Hlgh Cut-in
426 ± 7
320 ± 20
i «... Cutout
Low Cut-in
7 ± 5
22 ± 5
FUSIBLE PLUG
210 F
*Not applicable
should be installed just after liquid line shutoff valve. PROVIDE SAFETY RELIEF — A fusible plug is
Do not use a receiver (a receiver is not provided with unit located in unit suction line. Do not cap this plug. If local
and one should not be used). code requires additional safety devices, install as directed.
MAKE PIPING SWEAT CONNECTIONS — Remove
plastic caps from liquid and suction service valves.
Use refrigerant grade tubing. Service valves are closed
from the factory and ready for brazing. After wrapping
the service valve with a wet cloth, the tubing set can be
brazed to the service valve using either silver bearing or
non-silver bearing brazing material. Consult local code
requirements. Refrigerant tubing and indoor coil are now
ready for leak testing.
NOTE: Unit is shipped with R-22 factory holding charge
indicated on nameplate.
Pass nitrogen or other inert gas through piping while
brazing to prevent formation of copper oxide.
A CAUTION
To avoid damage while brazing, service valves should
be wrapped with a heat-sinking material such as a wet
cloth.
Step 4 — Complete Electrical Connections
POWER WIRING — Unit is factory wired for voltage
shown on nameplate. Provide adequate fused disconnect
switch within sight of unit, readily accessible, but out of
reach of children. Provision for locking switch open (off)
is advisable to prevent power from being turned on while
unit is being serviced. Disconnect switch, fuses, and field
wiring must comply with National Electrical Code and
local code requirements. Use copper wire only between
disconnect switch and unit. Use minimum 60 C wire for
field power connection.
Route power wires through opening in unit side panel
and connect in unit control box as shown on unit label
diagram and Fig. 6. Unit must be grounded
5