Daikin Trailblazer AGZ030E-070E, Инструкция по установке, эксплуатации и обслуживанию

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IOM 1207-6 • TRAILBLAZER
®
MODEL AGZ CHILLERS 20 www.DaikinApplied.com
Remote Evaporators
Remote Evaporators
Refrigerant Piping and Application
AGZ-E units have two circuits, each with either tandem or trio
compressors. These circuits must be kept separate throughout
the entire refrigerant piping system. Pipe all lines (suction,
liquid, and hot gas bypass, if used) of each evaporator circuit to
the corresponding circuit on the outdoor unit. Evaporator circuit
#1 must be piped to the circuit #1 condensing unit. Evaporator
circuit #2 must be piped to the circuit #2 condensing unit. Be
careful not to cross-pipe any lines.
CAUTION
Refrigerant circuits must be kept isolated from each other
throughout the entire system. Note that the connection
locations vary by model size, see Figure 24 and Figure 25 .
Braze connections on evaporator are stainless steel so a
minimum of 40% silver braze rod must be used.
Figure 24: Connection Locations - AGZE Models 030-070
Figure 25: Connection Locations - AGZE Models 075-241
Performance Adjustments Due to Piping
Performance will be impacted by the equivalent feet of piping
between the condensing unit and the evaporator. To determine
the adjusted unit capacity, power, and efficiency, refer to DST
Pathfinder selection software.
Piping Recommendations
IMPORTANT: Refrigerant piping information for this manual
has changed to reflect only Microchannel coils.
New refrigerant piping must be used for all equipment
installations. Refrigerant piping must be properly sized for
the circuit capacity and unit refrigerant. Piping system must
be brazed and have the proper lay out with all required
components.
IMPORTANT NOTE
Service Form SF99006 (current version available from the
local sales office) must be submitted to Daikin Technical
Response Center and reviewed at least two weeks prior to
beginning piping installation.
Refrigerant piping design must be provided by a qualified
HVAC Design Engineer familiar with piping design, as
well as local codes and regulations. The manufacturer
recommendations provided here are to be used as a general
guide, and do not replace system design by a qualified
professional. All field piping, wiring, and procedures must be
performed in accordance with ASHRAE, EPA, local codes, and
industry standards.
Proper refrigerant piping can make the difference between a
reliable system and an inefficient, problematic system. See the
recommended field pipe sizes shown in Table 6 and Table 7 on
page 23 . For additional information about refrigerant piping
techniques and sizing, see the Daikin Applied Refrigerant
Piping Design Guide, AG 31-011, which is found on www.
DaikinApplied.com.
The primary concerns related to piping are refrigerant pressure
drop, an adequately subcooled liquid feed to the expansion
valves, continuous oil return, and properly sized refrigerant
specialties. AGZ-E unit performance is negatively affected by
suction line pressure drop losses. The distance between the
AGZ-E condensing unit and the remote evaporator should be
kept as short as possible to minimize the performance derate.
Underground refrigerant piping is not permitted.
WARNING
Improper installation can cause refrigerant migration, flood
back, oil loss, line corrosion, or mechanical failures
CAUTION
Glycol is not allowed to be used in AGZ-E remote evaporator
installations.
For installations where the evaporator is installed either above
or below the unit - the following recommendations apply:
Evaporator installed below outdoor unit:
• 30 ft. maximum measured vertical distance, 75 ft.
maximum vertical equivalent length
• Only single riser suction tubing is to be used - Double
riser installations are not permitted
• A suction line trap must be installed at the bottom of the
riser and a second trap at 20 ft. height
SO FIELD MUST USE MIN 45% SILVER BRAZE ROD.
BRAZE CONNECTIONS ON EVAP ARE STAINLESS STEEL,
LIQUID
CIR. #1
SUCTION
CIR. #1
TEMP SENSOR
ENTERING WATER
CIR. #2
LOCATION
LIQUID
CIR. #2
SUCTION
STAINLESS STEEL
PIPE PLUG
SUCTION
CIRCUIT #2
LIQUID CIRCUIT #2
SUCTION
CIRCUIT #1
LIQUID
CIRCUIT #1
ENTERING WATER TEMP
SENSOR LOCATION