Remote Evaporators
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IOM 1207-6 • TRAILBLAZER
®
MODEL AGZ CHILLERS
Liquid Line Solenoid Valve
The liquid line solenoid valves are supplied as part of the
Refrigerant Specialties Kit with a DIN connector. These 120
volt valves must be located within 3 feet of the evaporator.
Field supplied wiring must be connected to the terminal block
inside the AGZ-E control box via a field-supplied junction
box and #14 ga. wiring. All wiring should be run in conduit as
required by local and national code. See Field Wiring Diagram
included in unit, or Typical Field Wiring Diagram on
and
for wiring schematic.
Service Pumpdown
The service pumpdown capacity of AGZ units with
microchannel condenser coils is less than the previous model
with tube and fin coils
.
Care should be exercised to include
all equipment and lines when calculating the system charge
relative to the unit’s pumpdown (storage) capacity. While the
AGZ-E remote evaporators have an insignificant operating
charge, the amount of refrigerant in interconnecting refrigerant
piping can be considerable. Due to the decreased refrigerant
capacity of microchannel condenser coils, isolating refrigerant
charge in the condenser is not recommended for remote
evaporator applications with line sets exceeding the measured
.
WARNING
Failure to follow condenser volume limits when isolating
refrigerant charge in the condenser may result in unit
damage, personal injury, and unintentional loss of refrigerant
to atmosphere if condenser refrigerant volume exceeds
published capacity limits.
It is mandatory that the liquid line solenoid valve be located
close to the evaporator so that pumpdown does not have to
remove and store a large quantity of liquid refrigerant from the
liquid line.
Table 9: Maximum Line Set Length for Charge Isolation
Unit
Models
Coil Type
Max . Measured Line Set Length for
Field Charge Isolation
Feet
030E
Microchannel
25
035E
25
040E
55
045E
55
050E
55
055E
50
060E
50
065E
50
070E
50
075E
70
080E
70
090E
70
100E
70
110E
70
120E
70
130E
70
140E
75
150E
75
161E
75
170E
75
180E
75
191E
90
211E
90
226E
105
241E
105
