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TXV — Thermostatic Expansion Valve
UNIT
38AQS
012
016
Fig. 6 — Recommended Filter Driers and Installation Locations
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
Fig. 8 — Location of Fusible Plug
LIQUID LINE
LEGEND
LIQUID
LINE
SIZE (in.)
1
/
2
5
/
8
1
/
2
5
/
8
Fig. 7 — Vapor Line Branch Piping Details
BI-FLOW FILTER DRIER
A
A
B
REDUCING TEE
CARRIER
QUANTITY
PART
REQUIRED
NO.
P504-8084S
2
P504-8165S
1
P504-8084S
2
P504-8085S
2
LEGEND
TXV — Thermostatic Expansion Valve
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
%
UNIT
COMPRESSOR
38AQS
CAPACITY
100
012
100
016
*Applies to Cooling mode of operation only.
9
TXV
INDOOR COIL
FIGURE
REFERENCE
A
B
A
A
CONDENSER
TEMP — F (C)*
TEMP — F (C)
Standard Unit
90 (32.2)
67
80 (26.7)
90 (32.2)
67
80 (26.7)
MINIMUM
OUTDOOR
35 (1.7)
45 (7.2)
23 (–5)
36 (2.2)
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