Operating/Standby Limits; Pressure Drop Curves - Daikin McQuay AGZ-D Operating And Maintenance Manual

Air-cooled scroll compressor chiller

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automatic through the ambient sensing

thermostat that energizes the evaporator heater

cable for protection against freeze-up. Unless

Operating/Standby Limits

 Maximum standby ambient air temperature, 130F (55C)

 Maximum operating ambient air temperature 105 F (40.6 C)

 Minimum operating ambient temperature (standard), 35F (2C)

 Minimum operating ambient temperature (with optional low-ambient control), -10F (-23.3C)

 Leaving chilled water temperature, 40F to 60F (4.4C to 15.6C)

 Leaving chilled fluid temperatures (with anti-freeze), 15F to 60F (-9.4C to 15.6C)

 Chilled water Delta-T range, 6 degrees F to 16 degrees F (3.3 degrees C to 8.9 degrees C)

 Part load minimum flow for variable flow systems, varies with unit size; see Table 8 on page 11.

 Maximum operating inlet fluid temperature, 76F (24C)

 Maximum non-operating inlet fluid temperature, 100F (38 C).

Evaporator pressure drop curves on the

following page. They apply to either packaged

or remote evaporator applications. Figure 1,

Evaporator Pressure Drops. See following page

for curve cross-reference on the next page

contains the evaporator reference letter and the

minimum and maximum flows allowed for

each unit.

Occasionally the same evaporator is used on

multiple units resulting in overlapping lines.

The minimum and maximum flows for a given

unit will be at the point where the unit

reference number appears.

OMM 1087

the evaporator is drained in the winter, the

disconnect switch to the evaporator heater must

not be open.

AGZ 025D through 190D

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