IMM AGS-2
23
ordering number 017503300. It is a paddle-type switch and adaptable to any pipe size from
1" (25mm) to 8" (203mm) nominal.
Certain minimum flow rates are required to close the switch and are listed in Table 13.
Installation should be as shown in Figure 18.
Electrical connections in the unit control center should be made at terminals 60 and 67 from
switch terminals Y and R. The normally open contacts of the flow switch should be wired
between these two terminals. Flow switch contact quality must be suitable for 24 VAC, low
current (16ma). Flow switch wire must be in separate conduit from any high voltage
conductors (115 VAC and higher) and have an insulation rating of 600 volts.
Table 13, Flow Switch Flow Rates
inch
1 1/4
1 1/2
2
2 1/2
3
4
5
6
8
Pipe Size
(NOTE !)
mm
32 (2)
38 (2)
51
63 (3)
76
102 (4)
127 (4)
153 (4)
204 (5)
gpm
5.8
7.5
13.7
18.0
27.5
65.0
125.0
190.0
205.0
Flow
Lpm
1.3
1.7
3.1
4.1
6.2
14.8
28.4
43.2
46.6
gpm
3.7
5.0
9.5
12.5
19.0
50.0
101.0
158.0
170.0
Min.
Adjst.
No
Flow
Lpm
0.8
1.1
2.2
2.8
4.3
11.4
22.9
35.9
38.6
gpm
13.3
19.2
29.0
34.5
53.0
128.0
245.0
375.0
415.0
Flow
Lpm
3.0
4.4
6.6
7.8
12.0
29.1
55.6
85.2
94.3
gpm
12.5
18.0
27.0
32.0
50.0
122.0
235.0
360.0
400.0
Max.
Adjst.
No
Flow
Lpm
2.8
4.1
6.1
7.3
11.4
27.7
53.4
81.8
90.8
NOTES:
1. A segmented 3-inch paddle (1, 2, and 3 inches) is furnished mounted, plus a 6-inch paddle loose.
2. Flow rates for a 2-inch paddle trimmed to fit the pipe.
3. Flow rates for a 3-inch paddle trimmed to fit the pipe.
4. Flow rates for a 3-inch paddle.
5. Flow rates for a 6-inch paddle.
Figure 18, Typical Field Water Piping
Vent
Drain
Gate
Valve
Water
Strainer
Vibration
Eliminator
Valved
Pressure
Gauge
In
Out
Protect All Field Piping
Against Freezing
Flow
Vibration
Eliminator
Flow
Switch
Balancing
Valve
Gate
Valve
Flow
Liquid
Suction
Notes:
1.
Connections for vent and drain fittings are located on the top and bottom of the evaporator.
2.
Piping must be supported to avoid putting strain on the evaporator nozzles.
Refrigerant Charge
All packaged units are designed for use with R-134a and are shipped with a full operating
charge. The operating charge for each unit is shown in the Physical Data Tables beginning
on page 26 for packaged units, and page 60 for remote evaporator models. Model AGS-
CM/CB with remote evaporators are shipped with a full unit charge. Refrigerant must be
added in the field for the evaporator and for the refrigerant lines.
Glycol Solutions
When using glycol anti-freeze solutions the chiller's capacity, glycol solution flow rate, and
pressure drop through the evaporator can be calculated using the following formulas and
tables.
