Carrier 48GH - Manual (Page 6)

Table 2 — Electrical Data
MODEL
48
SERIES V-PH
OPER
VOLTAGE
RANGE
TOTAL
AMPS
MAX BRANCH
CIRCUIT FUSE
SIZE (Amps)*
MCA
MIN
WIRE SIZE
(AWG)t
MAX WIRE
LENGTH
(ft)t
Min Max
GL018 320 208-230-1 197 253 11 4 20 13.8 14 67
GL024 320 208-230-1 197 253 160 30 194 12 76
GH024 320 208-230-1 197 253 17 3 30 20 7 10 112
GL030 320/330 208-230-1 197 253 19 3 35 23 4 10 100
GH030 320/330 208-230-1 197 253 19.1 35 23 2 10 101
320/330 208-230-1 197 253 25 0 45 30.0 r 10 77
GL036 520/530 208/230-3 187 253 18 6 35 21 9 10 121
620/630 460-3 414 506 9 1 15 108 14 218
320/330 208-230-1 197 253 24.8 45 29 8 10 78
GH036
520/530 208/230-3 187 253 19 5 35 22.8 10 116
GL042
320 208-230-1 197 253 26.4 50 31 8 8 117
520 208/230-3 187 253 21 9 40 25.8 10 103
GH042
320 208-230-1 197 253 26 2 50 31 6 8 117
520 208/230-3 187 253 21.3 40 25.2 10 106
320 230-1 207 253 30 3 60 36 3 8 107
GL048 520 208/230-3 187 253 26 6 45 30 8 8 135
620 460-3 414 506 11.7 20 135 14 169
GH048
320 230-1 207 253 29 5 60 35.5 8 110
520 208/230-3 187 253 24 6 45 28 8 10 92
GL060 320/330 230-1 207 253 43.4 60 52 3 6 116
GH060 320/330 230-1 207 253 43 7 60 52 6 j 6 116
AWG —American Wire Gage
MCA —Minimum Circuit Ampacity
*Maximum Dual Element Size.
tUse only copper wire for field connections to unit. Wire size is
based on 60 C or 75 C copper conductor at 86 F (30 C) ambient
temperature and ampacity shown in table If other than 60 C or
75 C copper conductor is used, if ambient temperature is above
86F, or if voltage drop of the wire exceeds 2% of total rated
voltage of the unit, determine wire size from ampacity shown
and National Electrical Code (NEC). Wire lengths shown are
measured one way along wire path between unit and service
panel for minimum voltage drop.
Adhere to the following criteria when selecting,
sizing, and installing duct system:
1. Select and size ductwork, supply-air registers
and return-air grilles according to Carrier Sys­
tem Design Manual, Part 2. System airflow must
he within range of temperature rise and external
static pressure shown on unit AGA rating plate.
CAUTION; When duci-sj'stem fastening boks
are being drilled into side of Model 4 M } H f C L
instead of the unit ductnanges, use extreme care
to avoid puncturing coil or coil tubes.
2. Use a flexible transition between rigid ductwork
and unit to prevent transmission of vibration.
The transition may be screwed or bolted to duct
flanges. Use suitable gaskets to ensure a weather
and airtight seal.
3. Install an external, field-supplied air filter(s)
in return-air ductwork where it is easily accessible
for service. Recommended filter sizes are shown
in Table 1.
4. Size all ductwork for maximum required airflow
(either heating or cooling) for unit being in­
stalled. Avoid abrupt duct size increases or
decreases.
5. Adequately insulate and weatherproof all duct­
work located outdoors. Insulate ducts passing
thru an unconditioned space, and use a vapor
barrier in accordance with latest issue of
SMACNA and NESCA minimum installation
standards for heating and air conditioning
systems. Secure all ducts to building structure.
6. Flash, weatherproof and vibration-isolate all
openings in building structure in accordance
with local codes and good building practices.
Step 4 — Make Wiring Connections
WARNING: Umt cabinet must have an un~
intemipted. unbroken electrical ground to
minimize the possibility of personal injury'
if an electrical fault should occur. Ibis ground
may consist of electrical wire connected to unit
ground lug in control compartment, or conduit
approved for electrical ground when installed in
accordance with National Electrical Code and
local electrical codes. Do not use gas piping
as an electrical ground. A failure to follow this
warning could result in the installer being liable
for the personal injury' of others.
CAUI ION: A failure lo follow' these precau­
tions could result in damage to unit being
installed: