Minimum Cooler Flow Rates; Minimum Fluid Volume In Circulation; Temperature Limits For Standard 30Rap Units; Low Ambient Operation - Carrier AQUASNAP 30RAP010-150 Controls, Start-Up, Operation, Service, And Troubleshooting

30RAP MINIMUM COOLER FLOW
SIZE RATE (gpm)
010
015
018
020
025
030
035
040
045
050
055
060
070
080
090
100
115
130
150
Table 22 — Minimum Fluid Volume in Circulation
NORMAL AIR
CONDITIONING
30RAP
APPLICATION
UNIT
gal/ton (L per kW)
SIZE
Std Unit HGBP Digital
010,015 12 (13) N/A 3 (3.3)
018-030 6 (6.5) 4 (4.3) 3 (3.3)
035-150 3 (3.3) 3 (3.3) 3 (3.3)
LEGEND
Hot Gas Bypass
HGBP —
High Cooler Leaving Chilled Water (Fluid) Temperatures
(LCWT) — During start-up with cooler LCWT above approx-
imately 60 F (16 C), the unit expansion valve will limit suction
pressure to approximately 142 psig (929 kPa) to avoid over-
loading the compressor.
Low Cooler LCWT — For standard units, the LCWT must be
no lower than 40 F (4.4 C). If the unit is the factory-installed
optional medium temperature brine unit, the cooler LCWT can
go down to 15 F (–9.4 C).
Table 23 — Temperature Limits for
Standard 30RAP Units
UNIT SIZE 30RAP
Temperature
Maximum Ambient
Temperature
Minimum Ambient
Temperature
Maximum Cooler EWT*
Maximum Cooler LWT
Minimum Cooler LWT
LEGEND
Entering Fluid (Water) Temperature
EWT —
Leaving Fluid (Water) Temperature
LWT —
*For sustained operation, EWT should not exceed 85 F (29.4 C).
LOW-AMBIENT OPERATION — If operating temperatures
below 45 F (7 C) on size 018-030 units, and 32 F (0° C) on size
035-150 units are expected, accessory Motormaster
must be installed. Operating temperatures can go as low
as –20 F (–29 C) on size 010 and 015 units, as standard.
Table 21 — Minimum Cooler Flow Rates
MAXIMUM COOLER FLOW
RATE (gpm)
13
17
20
23
28
33
41
47
53
57
63
68
86
98
107
123
140
158
175
PROCESS COOLING,
LOW AMBIENT
OPERATION, OR MEDIUM
TEMPERATURE BRINE
APPLICATIONS
gal/ton (L per kW)
Std Unit HGBP Digital
12 (13) N/A 6 (6.5)
10 (10.8) 10 (10.8) 6 (6.5)
6 (6.5) 6 (6.5) 6 (6.5)
010-030 035-150
F C F C
120 49 120 49
45 7 32 0
95 35 95 35
70 21 70 21
40 4.4 40 4.4
® V control
MINIMUM COOLER FLOW
RATE (l/s)
50
66
78
91
112
133
164
186
209
228
251
270
310
355
387
444
503
569
629
Installation of wind baffles is also required. Refer to sep-
arate installation instructions for operation using this accessory.
Contact your Carrier representative for details.
Brine duty application (below 40 F [4.4 C] LCWT) for
chiller normally requires factory modification. Contact
your Carrier representative for applicable LCWT range for
standard water-cooled chiller in a specific application.
VOLTAGE — ALL UNITS
Main Power Supply — Minimum and maximum acceptable
supply voltages are listed in the Installation Instructions.
Unbalanced 3-Phase Supply Voltage — Never operate a motor
where a phase imbalance between phases is greater than 2%.
To determine percent voltage imbalance:
% Voltage Imbalance = 100 x
The maximum voltage deviation is the largest difference
between a voltage measurement across 2 legs and the average
across all 3 legs.
Example: Supply voltage is 240-3-60.
AB = 243 v
BC = 236 v
AC = 238 v
1. Determine average voltage:
Average voltage =
47
MAXIMUM COOLER FLOW
RATE (l/s)
0.8
1.1
1.3
1.5
1.8
2.1
2.6
3.0
3.3
3.6
4.0
4.3
5.4
6.2
6.8
7.8
8.8
10.0
11.0
CAUTION
max voltage deviation
from avg voltage
average voltage
243 + 236 + 238
3
717
=
3
= 239
3.2
4.2
4.9
5.7
7.1
8.4
10.3
11.7
13.2
14.4
15.8
17.0
19.6
22.4
24.4
28.0
31.7
35.8
39.6