Flow Control:
MBV
WRV
Cooling Type:
Glycol
GLYCOOL™
Glycol
GLYCOOL™
Drycoolers in Loop
1
Multiple
1
Multiple
1
Multiple
1
Multiple
Stat Setting*
Optional
Factory
Optional
Optional
Factory
Factory
Optional Optional
Insulate Field Piping
Yes
No
Yes
Yes
No
No
Yes
Yes
* See
through
MBV = motorized ball valve, WRV = water regulating valve
Table 9.1 Water/Glycol System Conditions Requiring Optional Settings for Aquastats
Dial Setting (Stat Open Temp) Set for Mid Differential 8°F (4.4°C) Rise to Close
Aquastat #
Fans
Factory Setting (Glycol)
(see Notes 1 and 2)
Optional Setting (GLYCOOL)
(see Note 3)
Minimum Allowed Settings for CRV
AQ1
F1
65°F (18.3°C)
35°F (1.7°C)
45°F (7.2°C)
AQ2
F2 & F3
4
75°F (23.9°C)
45°F (7.2°C)
55°F (12.8°C)
AQ3
5
F4
5
70°F (21.1°C)
40°F (4.4°C)
50°F (10.0°C)
1.
All drycoolers are shipped at Factory Setting.
2.
Factory Setting is used for all glycol applications, except single drycooler loops with motor ball valve controls.
3.
Stats must be field-adjusted to Optional Setting for GLYCOOL/Dual Cool applications and all single drycooler loops using motorized-ball-valve flow controls
4.
F3 fan available only on drycoolers with 3 or 4 fans.
5.
AQ3 and F4 applicable only on drycoolers with 4 fans.
Source: DPN001602 Rev. 5
Table 9.2 Aquastat Settings—2 Fan through 4 Fan Drycoolers
Dial Setting (Stat Open Temp) Set for Mid Differential 8°F (4.4°C) Rise to Close
Aquastat #
Fans
Stat Location Cabinet
Factory Setting
(Glycol)
(see Notes 1
and 2)
Optional Setting
(GLYCOOL)
(see Note 3)
AQ1
F1
Main
65°F (18.3°C)
35°F (1.7°C)
AQ2
F2
Main
70°F (21.1°C)
40°F (4.4°C)
AQ3
F3 & F4
Auxiliary
73°F (22.8°C)
43°F (6.1°C)
AQ4
F5 & F6
Auxiliary
75°F (23.9°C)
45°F (7.2°C)
AQ5
4
F7 & F8
4
Main
78°F (25.6°C)
48°F (8.9°C)
1.
All drycoolers are shipped at Factory Setting.
2.
Factory Setting is used for all glycol applications, except single drycooler loops with motor ball valve controls.
3.
Stats must be field-adjusted to Optional Setting for GLYCOOL/Dual Cool applications and all single drycooler loops using motor ball valve flow controls.
4.
'AQ5 and F7 and F8 applicable only on Drycoolers with 8 fans.
Source: DPN001602 Rev. 5
Table 9.3 Aquastat Settings—6 Fan and 8 Fan Drycoolers
Vertiv | Liebert® Drycooler Installer/User Guide
54
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