Carrier Air Conditioner 38APD025 130 User Manual

38APS025-065  
38APD025-130  
Long Line Check Valve Accessory  
50/60 Hz  
Installation Instructions  
Part No.: 38AP-900---011, 38AP-900---012, 38AP-900---013  
The kit consists of a liquid line check valve and a bypass  
SAFETY CONSIDERATIONS  
check valve to prevent charge migration to compressor.  
When installing this accessory, observe precautions in the  
literature and on any labels attached to the equipment, and all  
other safety precautions that may apply.  
INSTALLATION  
Follow all safety codes.  
Wear safety glasses and work gloves.  
Use care in handling and installing this accessory.  
CAUTION  
For all units with liquid lines of 100 ft (30.5 m) or more or  
any 025-030 size dual circuit unit application where evapo-  
rator is located higher than the condensing unit and liquid  
lines exceed 55 feet (16.8 m), a long line check valve must  
be installed to prevent compressor failure. The long line  
check valve accessory must be mounted in the liquid line  
as close as possible to the condensing unit.  
WARNING  
To avoid the possibility of electrical shock, open and tag all  
disconnects before installing this equipment. Failure to do  
so could result in severe personal injury.  
The long line check valve accessory must be mounted in the  
liquid line near the condensing unit. The valve is brazed into  
the liquid line. Fitting adapters may be required to connect the  
check valve to the liquid line. The valve may be mounted in  
any orientation, horizontally or vertically. See Fig. 1 for dimen-  
sions. Figure 2 shows the location of the check valves on a  
rooftop installation. Figure 3 shows the location of the check  
valves on a ground level installation.  
INTRODUCTION  
An accessory long line check valve must be installed for:  
1. Any 025-030 size dual circuit unit where the evapora-  
tor is located higher than the condensing unit and the  
linear line length exceeds 55 ft (16.8 m).  
2. Any size dual or single circuit unit with linear line  
length of 100 ft (30.5 m) or more.  
ACCESSORY USAGE  
CHECK  
VALVE SIZE  
(in. ODF)  
ACCESSORY USAGE (QUANTITY) — PART NO. 38AP-900---  
UNIT  
SIZE  
CIRCUIT  
TYPE  
011  
012  
013  
Dual  
Single  
Dual  
5/8 + 5/8  
5/8  
2
1
1
1
38APD/S025  
38APD/S027  
38APD/S030  
38APD/S040  
38APD/S050  
5/8 + 5/8  
5/8  
2
Single  
Dual  
1
5/8 + 5/8  
7/8  
2
Single  
Dual  
2
5/8 + 5/8  
7/8  
1
Single  
Dual  
2
5/8 + 5/8  
7/8  
1
Single  
Dual  
1
38APD060  
38APS065  
38APD070  
38APD080  
38APD090  
38APD100  
38APD115  
38APD130  
5/8 + 7/8  
7/8  
1
Single  
Dual  
1
7/8 + 7/8  
7/8 + 7/8  
7/8 + 7/8  
7/8 + 7/8  
7/8 + 7/8  
7/8 + 1 1/8  
2
Dual  
2
Dual  
2
Dual  
2
Dual  
2
Dual  
1
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 04-53380009-01 Printed in U.S.A. Form 38AP-5SI Pg 1 5-10 Replaces: New  
 
40RU  
a38-7098_gs  
LEGEND  
NOTES:  
1. All piping must follow standard refrigerant piping techniques. Refer to Carrier System  
Design Manual for details.  
LLSV — Liquid Line Solenoid Valve  
NEC — National Electrical Code  
TXV — Thermostatic Expansion Valve  
Piping  
2. All wiring must comply with the applicable local and national codes.  
3. Wiring and piping shown are general points-of-connection guides only and are not  
intended for, or to include all details for, a specific installation.  
4. Install field-supplied disconnect switch in accordance with all local and national electrical  
codes.  
Double Riser Piping (if required)  
*Field supplied.  
5. Liquid line solenoid valves (solenoid drop control) are not required but are recommended  
to prevent refrigerant migration to the compressor.  
†If double suction riser is required for piping  
system, size short riser (3 ft [0.9 m] maximum)  
according to base unit installation instructions.  
**Field supplied. See base unti installation  
instructions for refrigerant specialties part  
numbers.  
6. Factory-supplied accumulator not shown.  
7. Dual-circuit piping shown. Single-circuit piping is similar but would only have one suction  
line and one liquid line.  
8. A field-supplied (min. 5% up to 15%) bleed port TXV is required for every application.  
9. Sight glass, LLSV, and filter drier are field supplied.  
10. Long line length check valves are required for liquid line installation on all linear line  
length applications of more than 100 ft (30.5 m). For any 025-030 size dual-circuit unit  
application where evaporator is located higher than the condensing unit, check valves  
are required for linear line length above 55 ft (16.8 m).  
Fig. 2 — Accessory Location — 38AP Unit Rooftop Installation  
3
 
a38-7099_gs  
NOTES:  
LEGEND  
1. All piping must follow standard refrigerant piping techniques. Refer to Carrier System  
Design Manual for details.  
2. All wiring must comply with the applicable local and national codes.  
3. Wiring and piping shown are general points-of-connection guides only and are not  
intended for, or to include all details for, a specific installation.  
4. Install field-supplied disconnect switch in accordance with all local and national electrical  
codes.  
LLSV — Liquid Line Solenoid Valve  
NEC — National Electrical Code  
TXV — Thermostatic Expansion Valve  
Piping  
*Field supplied.  
†Field supplied. See base unit installation  
instructions for refrigerant specialties part  
numbers.  
5. Liquid line solenoid valves (solenoid drop control) are not required but are recom-  
mended to prevent refrigerant migration to the compressor.  
6. Factory-supplied accumulator not shown.  
7. Dual-circuit piping shown. Single-circuit piping is similar but would only have one suction  
line and one liquid line.  
8. A field-supplied (min. 5% up to 15%) bleed port TXV is required for every application.  
9. Sight glass, LLSV, and filter drier are field supplied.  
10.Long line length check valves are required for liquid line installation on all linear line  
length applications of more than 100 ft (30.5 m). For any 025-030 size dual-circuit unit  
application where evaporator is located higher than the condensing unit, check valves  
are required for linear line length above 55 ft (16.8 m).  
Fig. 3 — Accessory Location — 38AP Unit Ground Level Installation  
Copyright 2010 Carrier Corporation  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Catalog No. 04-53380009-01 Printed in U.S.A. Form 38AP-5SI Pg 4 5-10 Replaces: New  
 

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