Operating instructions
14 ACZ / AGZ-BM IMM ACZ/AGZ-4
Table 5, Isolator Locations
ACZ-BS, AGZ-BM Less Evaporator Units
Operating
Weight
Neoprene-In-Shear Mountings Spring-Flex Mountings
ACZ-
BS
Model
AGZ-
BM
Model
lbs kg 1 2 3 4 5 6 1 2 3 4 (1) 5 6
030 026
3600 1631 Black Gray Gray Green - - Orange Purple Red Orange
035 030
3600 1631 Black Gray Gray Green - - Orange Purple Red Orange - -
040 035
3600 1631 Black Gray Gray Green - - Orange Purple Red Orange - -
045 040
3610 1635 Black Gray Gray Green - - Orange Purple Purple Orange - -
050 045
3650 1653 Black Gray Gray Green - - Orange Purple Purple Orange - -
055 050
3800 1721 Black Gray Gray Green - - Orange Purple Purple Orange - -
060 055
3850 1744 Black Gray Gray Green - - Orange Purple Purple Orange - -
065 060
4040 1830 Black Gray Gray Green - - Orange Purple Purple Orange - -
070 065
4070 1844 Black Black Gray Gray - - Orange Purple Purple Red - -
080 070
4180 1894 Black Black Gray Gray - - Orange Orange Purple Red - -
090 075
5630 2550 Red Black Red Black - - Green Orange Green Orange - -
100 085
5790 2623 Red Black Red Black - - Green Orange Green Orange - -
110 090
5950 2695 Red Black Red Black - - Green Orange Green Orange - -
120 100
6970 3157 Black Black Black Black Black Black Orange Orange Purple Orange Orange Purple
130 110
7230 3275 Black Black Black Black Black Black Orange Orange Purple Orange Orange Purple
140 120
7480 3388 Red Black Black Red Black Black Green Orange Purple Green Orange Purple
155 130
7760 3515 Red Black Black Red Black Black Green Orange Purple Green Orange Purple
NOTE (1): Position #4 is a CP-1, single spring isolator for ACZ 030 to 065 and AGZ 026 to 060. All others are CP-2, two
spring.
Ambient Temperature and Water Flow Limitations
ACZ/AGZ units are designed to operate in ambient temperatures as shown in the following table.
Table 6, Unit Maximum Operating Ambient Temperature
Unit Model Standard Controls
w/ Low Ambient VFD
Control Option
w/ Low Ambient VFD Control
Plus High Ambient Panel Option
AGZ 026B – 130B
ACZ 030B – 155B
115°F 105°F 125°F
The VFD Low Ambient Control Option imposes an additional heat load on the control panel limiting
operation to 105°F ambient temperature. The addition of the High Ambient Panel Option allows
operation to 125°F ambient temperature.
Compressor loading and unloading is adaptively determined by system load, ambient air temperature,
and other inputs to the MicroTech control algorithms. An optional low ambient fan VFD option allows
operation down to 0°F (-18°C). The minimum ambient temperature is based on still conditions where
the wind is not greater than five mph. Greater wind velocities will result in reduced discharge pressure,
increasing the minimum operating ambient temperature. Field-installed hail/wind guards are available
to allow the chiller to operate effectively down to the ambient temperature for which it was designed.
Evaporator flow rates can be found on page
25. Operation below the minimum values can result in
laminar flow causing freeze-up problems, scaling and poor control. Flow rates above the maximum
values will result in unacceptable pressure drops and can cause excessive erosion, potentially leading to
failure.
Water Piping (Model AGZ-BM)
Local authorities can supply the installer with the proper building and safety codes required for safe and
proper installation.
Install piping with minimum bends and changes in elevation to minimize pressure drop. The following
issues must be considered when designing and installing water piping: