Configuring Return Temperature Reset; Outdoor-Air Temperature Reset; Space Temperature Reset; Return Fluid Reset - Carrier AquaSnap 30MPA Series Controls, Start-Up, Operation, Service, And Troubleshooting

MODE KEYPAD
(RED LED) ENTRY
ENTER
CONFIGURATION
LEGEND
LWT — Leaving Water (Fluid) Temperature
Fig. 19 — Outdoor-Air Temperature Reset
LEGEND
LWT — Leaving Water (Fluid) Temperature
Fig. 20 — Space Temperature Reset
Table 30 — Configuring Return Temperature Reset
SUB-MODE KEYPAD
ITEM
ENTRY
DISP TEST
ENTER
UNIT TYPE
ENTER
OPT1 FLUD
ENTER
OPT2 CTRL
ENTER
CCN
EXV.A
RSET CRST
ENTER
RT.NO
RT.F
RT.DG
ITEM
DISPLAY
EXPANSION
ON/OFF TEST DISPLAY LEDs
X UNIT TYPE
X COOLER FLUID
X CONTROL METHOD
3 COOLING RESET TYPE
RETURN FLUID - NO
10.0 F
RESET TEMP
RETURN FLUID - FULL
2.0 F
RESET TEMP
RETURN - DEGREES
5.0 F
RESET
54
12.2
11.1 54
50
10.0
48
8.9
46
7.8
44
6.7
SET POINT — 44 F
DESIGN RISE — 10 F
42
5.6
0 10
LEGEND
Entering Water (Fluid) Temperature
EWT —
Leaving Water (Fluid) Temperature
LWT —
Fig. 21 — Standard Chilled Fluid
Temperature Control — No Reset
10
9
8
7
6
RT.F = 2
5
4
3
CHANGE IN
LIMIT SETPOINT
2
1
0
0 1 2
ΔT (°F or °C), Entering Fluid Temperature - Leaving Fluid Temperature
Fig. 22 — Return Fluid Reset
33
COMMENT
0 = No Reset
1 = 4 to 20 mA Input (EMM required)
(Connect to EMM TB6-2,3)
2 = Outdoor-Air Temperature
3 = Return Fluid
4 = Space Temperature
(Connect to TB5-5,6)
Default: 10.0 F (5.6 C)
Range: 0° to 30 F COOLER DT
(0.0 to 16.7 C)
Default: 0 F (–17.8 C)
Range: 0° to 30 F COOLER DT
(0.0 to 16.7 C)
Default: 0 F (0 C)
Range: –30 to 30°F (–16.7 to 16.7 C)
DESIGN RISE
LWT
20 30 40 50 60 70
% UNIT LOADING
DESIGN RISE
CHANGE IN CHILLED
ΔT
FLUID,
RESET AMOUNT RT.NO = 10
3 4 5 6 7 8
80 90 100
RT.DG = 5
9 10