Applied Air GAS-FIRED HEATERS, Installation & Operation Instruction

Page: 16 / 64

– 16 –
RP-13B
RP-18
RP-19
RP-10
SECOND STAGE COOLING
FIRST STAGE COOLING
RP-10
SECOND STAGE SUCTION
FIRST STAGE SUCTION
RP-09
RP-11 TO
RP-17
TO RP-11
RP-09
RP-18
12"
TO
24"
A-FRAME COIL ASSEMBLY END ELEVATION
COIL 'B'
RP-16
COIL 'A'
RP-12B RP-12A
RP-13A
SEE NOTE #12
THE ABOVE PIPING SCHEMATIC SHOULD BE USED AS A GUIDE ONLY.
PROPER ENGINEERING DESIGN OF THE OVERALL REFRIGERATION
SYSTEM MAY DICTATE AN ALTERNATE PIPING SCHEMATIC BE USED
TO THE ONE ILLUSTRATED ABOVE.
TO RP-11A
RP-09
RP-18
RP-11A TO
RP-09
RP-18
2. ALL PIPING TO BE ACR TYPE 'L' COPPER.
GENERAL NOTES:
3. ALL PIPING TO BE PITCHED IN THE DIRECTION OF
REFRIGERANT FLOW. PITCH TO BE 1 INCH PER 10 FEET.
4. ALL SUCTION LINES TO BE INSULATED.
5. LIQUID LINE FILTER/DRIER, SIGHT GLASS, SUCTION LINE
FILTER/DRIER, ISOLATION VALVES, FITTINGS, DISCHARGE
VIBRATION ABSORBER, ACCUMULATORS AND OTHER
AVAILABLE SYSTEM OPTIONS ARE NOT SHOWN.
6. RECOMMEND LONG RADIUS ELBOWS BE USED TO MINIMIZE
SYSTEM PRESSURE DROP.
7. RECOMMEND LIQUID LINES FOR R-410A BE SIZED FOR A
MAXIMUM PRESSURE DROP OF 6 PSIG.
8. RECOMMEND SUCTION LINES FOR R-410A BE SIZED FOR A
MAXIMUM PRESSURE DROP OF 3 PSIG.
9. RECOMMEND CONDENSER SUBCOOLING CIRCUIT FOR R-410A
BE CAPABLE OF SUBCOOLING LIQUID BETWEEN 12 TO 19°F.
1. RECOMMEND FIRST STAGE AND SECOND STAGE OF COOLING
BE PROVIDED WITH HOT GAS BYPASS.
10. CONNECT 1/4" O.D. EXTERNAL EQUALIZING LINE GENERALLY
LOCATED IN EACH SUCTION HEADER OF EACH DX COIL TO
THE APPROPRIATE THERMAL EXPANSION VALVE (TXV).
11. SENSING BULB FROM THERMAL EXPANSION VALVE (TXV) TO
BE LOCATED ON THE SIDE OF A HORIZONTAL PORTION OF
THE DX COILS' SUCTION LINE PIPING AT AN ANGLE OF
APPROXIMATELY 120° FROM VERTICAL. DO NOT LOCATE
SENSING BULB ON ANY PIPING USED IN A TRAP OR
DOWNSTREAM OF A TRAP.
12. INSTALL TRAP IN SUCTION LINE AS ILLUSTRATED IF
COMPRESSOR IS LOCATED BELOW THE THE DX COIL.
13. ALL COIL SPECIALTIES AND REFRIGERANT PIPING SHOWN
OTHER THAN THE REFRIGERANT DISTRIBUTOR AND ANY OTHER
REQUIRED REFRIGERATION SYSTEM SPECIALTIES ARE TO BE
PROVIDED BY AND INSTALLED IN THE FIELD BY OTHERS.
COMPONENT IDENTIFICATION
RP-09 HOT GAS BYPASS TEE
RP-10 LIQUID LINE SOLENOID VALVE
RP-11 HOT GAS BYPASS VALVE - SECOND STAGE
RP-12A THERMAL EXPANSION VALVE (TXV-1A)
CIRCUIT #2 - COIL 'A'
THERMAL EXPANSION VALVE (TXV-2A)
RP-13A
CIRCUIT #1 - COIL 'A'
THERMAL EXPANSION VALVE (TXV-1B)
RP-12B
CIRCUIT #2 - COIL 'B'
THERMAL EXPANSION VALVE (TXV-2B)
RP-13B
CIRCUIT #1 - COIL 'B'
RP-16 DX EVAPORATOR COIL 'A' - INTERTWINED
RP-17 DX EVAPORATOR COIL 'B' - INTERTWINED
RP-18 REFRIGERANT DISTRIBUTOR
RP-19 CONDENSATE PAN PROVIDED WITH DRAIN
CONNECTIONS ON BOTH ENDS
HOT GAS BYPASS VALVE - FIRST STAGE RP-11A
P000971R410