Carrier GTR040-420 Spezifikationen PDF herunterladen (Seite 48)

Table 27 — Configuring Temperature Reset

Table 28 — 4-20 mA Reset

NOTE: The example above shows how to configure the chiller for 4-20 mA reset. No reset will occur

at 4.0 mA input, and a 5.0 F reset will occur at 20.0 mA. An EMM is required.

MODE

KEYPAD

ENTRY

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY

ITEM

EXPANSION

COMMENT

CONFIGURATION

DISP TEST ON/OFF TEST DISPLAY LEDS

UNIT TYPE UNIT TYPE

OPT1 FLUD COOLER FLUID

OPT2 CTRL CONTROL METHOD

RSET CRST COOLING RESET TYPE 0 = No Reset

1 = 4 to 20 mA Input (EMM required)

(Connect to TB6-2,5)

2 = Outdoor-Air Temperature

(Connect to TB5-7,8)

3 = Return Fluid

4 = Space Temperature (Connect to

TB5-5,6)

CRT1 XXX.X F NO COOL RESET TEMP

Default: 125 F (51.7 C)

Range: 0° to125 F

Set to 4.0 for CRST= 1

CRT2 XXX.X F FULL COOL RESET TEMP

Default: 0° F (–17.8 C)

Range: 0° to 125 F

Set to 20.0 for CRST=1

DGRC XX.X °F DEGREES COOL RESET

Default: 0° F (0° C)

Range: –30 to 30° F (–16.7 to 16.7° C)

SUB-MODE

KEYPAD

ENTRY

ITEM DISPLAY

ITEM

EXPANSION

COMMENT

RSET

CRST 1

COOLING RESET

TYPE

0 = no reset

1 = 4 to 20 mA input

2 = Outdoor air temp

3 = Return Fluid

4 = Space Temperature

CRT1 4.0

NO COOL RESET

TEMP

Default: 125 F (51.7 C)

Range: 0° to 125 F

CRT2 20.0

FULL COOL

RESET TEMP

Default: 0° F (–17.8 C)

Range: 0° to 125 F

DGRC

5.0 F

(2.8 C)

DEGREES COOL

RESET

Default: 0°F (0° C) Reset at 20 mA

Range: –30 to 30 F (–16.7 to 16.7 C)

ENTER ENTER

ENTER

LEGEND

LWT —

Leaving Water (Fluid) Temperature

Fig. 24 — Outdoor-Air Temperature Reset

LEGEND

LWT —

Leaving Water (Fluid) Temperature

Fig. 23 — Space Temperature Reset

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 103 104

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