9
PROVIDE SAFETY RELIEF — A fusible plug is located on
the compressor crankcase (Fig. 8). Do not cap this plug. If
local code requires additional safety devices, install as directed.
Head Pressure Control
— Fan cycling for head pressure con-
trol is a standard offering but is functional on the cooling cycle
only. Number 2 fan cycles as a function of liquid pressure. Fan
cycling pressure switch cycles the fan off at 160 ± 10 psig
(1103 ± 69 kPag) as pressure decreases and cycles back on at
255 ± 10 psig (1758 ± 69). Switch is automatically bypassed in
heating cycle. Table 6 shows minimum outdoor ambient air
temperature for full cooling capacity.
Table 6 — Minimum Outdoor Air
Operating Temperature
*Applies to Cooling mode of operation only.
UNIT
38AQS
%
COMPRESSOR
CAPACITY
CONDENSER
TEMP — F (C)
MINIMUM
OUTDOOR
TEMP — F (C)*
Standard Unit
012
100
67
90 (32.2)
80 (26.7)
35 (1.7)
45 (7.2)
016
100
67
90 (32.2)
80 (26.7)
23 (–5)
36 (2.2)
LIQUID LINE
BI-FLOW FILTER DRIER
TXV
REDUCING TEE
INDOOR COIL
B
A
A
UNIT
38AQS
LIQUID
LINE
SIZE (in.)
CARRIER
PART
NO.
QUANTITY
REQUIRED
FIGURE
REFERENCE
012
1
/
2
P504-8084S 2 A
5
/
8
P504-8165S 1 B
016
1
/
2
P504-8084S 2 A
5
/
8
P504-8085S 2 A
LEGEND
TXV
—
Thermostatic Expansion Valve
Fig. 6 — Recommended Filter Driers and Installation Locations
LEGEND
TXV
—
Thermostatic Expansion Valve
Fig. 7 — Vapor Line Branch Piping Details
Fig. 8 — Location of Fusible Plug
To Next Page
Loading...
