Step 6 - Install Accessories - Carrier 38AU Installation, Start-Up And Service Instructions Manual

LIQUID LINE
UNIT
SIZE (in.)
3
38AUZ*07 /
8
3
/
8
38AUZ*08
1
/
2
1
38AUZ*12 /
2
5
38AUZ*14 /
8
3
38AUD*12 /
8
1
38AUD*14 /
2
‡
Bushings required.
TXV
INDOOR SENSING
COIL CKT BULB
AIRFLOW 15 DIAMS
10
MIN
DIAMS
8 DIAMS
MIN
Single Circuit Coil Piping Configuration - AUZ07, 08
For single compressor condensing units
TXV
INDOOR SENSING
COIL CKT 2 BULB
15 DIAMS
AIRFLOW
10
MIN
DIAMS
8 DIAMS
MIN
TXV
SENSING
INDOOR
BULB
COIL CKT 1
AIRFLOW 15 DIAMS
10
MIN
DIAMS
8 DIAMS
Dual Circuit Coil Piping Configuration - AUZ12, 14
For single compressor condensing units
LEGEND
TXV — Thermostatic Expansion Valve
Fig. 5 — Location of Sight Glass(es)
and Filter Driers
Table 5 — Refrigerant Specialities Part Numbers.
LIQUID LINE
SOLENOID VALVE (LLSV)
ALC-066208
ALC-066208
ALC-066209
ALC-066211
ALC-066212
ALC-066208 (Qty 2)
ALC-066209 (Qty 2)
EQUALIZER LINE
SIGHT GLASS
A LOCATION
FILTER DRIER
TXV
A LOCATION
SIGHT GLASS
B LOCATION
FILTER
DRIER
B LOCATION
DROP
CONTROL
SOLENOID
VALVE
EQUALIZER LINE
SIGHT GLASS
A LOCATION
TXV FILTER DRIER
CKT 2 A LOCATION
SIGHT
GLASSES
B LOCATION
FILTER
DROP
DRIERS
CONTROL
B LOCATION
SOLENOID
VALVE
TXV
CKT 1
MIN
LLSV SIGHT
COIL GLASS
AMG-24/50-60 HMI-1TT3
AMG-24/50-60 HMI-1TT3
AMG-24/50-60 HMI-1TT4
AMG-24/50-60 HMI-1TT4
AMG-24/50-60 HMI-1TT5
AMG-24/50-60 HMI-1TT3
AMG-24/50-60 HMI-1TT4
Factory
High-Flow
Access Port
Service Valve
with Stem Cap
Fig. 6 — Typical Piping Connection Assembly
EVACUATION/DEHYDRATION — Evacuate and dehydrate
the connected refrigeration system (excluding the 38AU unit)
to 500 microns using a two-stage vacuum pump attached to the
service ports outside the 38AU service valves, following de-
scription in GTAC II, Module 4, System Dehydration.
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal injury,
death and/or equipment damage.
Puron® (R-410A) refrigerant systems operate at higher
pressures than standard R-22 systems. Do not use R-22
service equipment or components on Puron refrigerant
equipment.
PRELIMINARY CHARGE — Before starting the unit, charge
R-410A liquid refrigerant into the high side of the system
through the liquid service valve. The amount of refrigerant
added must be at least 80% of the operating charge listed in the
Physical Data table (Tables 1A through 2B, pages 4 through 7)
LESS the factory charge quantity (if factory shipping charge
has not been removed). Allow high and low side pressures to
equalize. If pressures do not equalize readily, charge R-410A
vapor (using special service manifold with expansion device)
into the suction line service port for the low side of system to
assure charge in the evaporator. Refer to GTAC II, Module 5,
Charging, Recover, Recycling, and Reclamation for liquid
charging procedures.
Step 6 — Install Accessories
Accessories requiring modifications to unit wiring should be
completed now. These accessories may include Winter Start
controls, Low Ambient controls, phase monitor, Compressor
LOCout. Refer to the instructions shipped with the accessory.
11
FILTER SUCTION LINE
DRIER ACCUMULATOR
‡
EK083S S-7063S
‡
EK083S S-7063S
‡
EK164S S-7063S
EK164S S-7063
EK305S S-7063
EK083S S-7061 (Qty 2)
‡
EK164S S-7063S (Qty 2)
Field Service
Access Port
(Schrader core)
Sweat
Connection