Carrier WeatherMaster 50HC Series Installation Instructions Manual page 44

Table 12 — Enthalpy Operation with DCV (CO
DEMAND OUTSIDE AIR
CONTROLLED GOOD TO
VENTILATION (DCV) ECONOMIZE
Below CO set
2
Above CO set
2
*With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for sec-
ond stage cooling by turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled.
†With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on second stage of mechanical cooling Y2–O after the delay if the call for Y1–I and
Y2–I have not been satisfied.
ECONOMIZING
AVAILABLE
NOT AVAILABLE
TEMPERATURE
ENTHALPY TEMP. DRY
CURVE BULB (F)
ES1
80
ES2
75
ES3
70
ES4
65
ES5
60
HL
86
Y1-I Y2-I
Off Off
On Off
No
On On
Off Off
On Off
Yes
On On
Off Off
On Off
No
On On
Off Off
On Off
Yes
On On
Fig. 62 — Single Enthalpy Curve Boundaries
Table 13 — Single Enthalpy and Dual Enthalpy High Limit Curves
TEMP. ENTHALPY
DEWPOINT (F) (btu/lb/da)
60
57
54
51
48
66
Sensor) — 1 Speed Fan
2
FAN
Y1-O Y2-O
SPEED
High 0-v/Off 0-v/Off
High 24-v/On 0-v/Off
High 24-v/On 24-v/On
High 0-v/Off 0-v/Off
High 0-v/Off 0-v/Off
High 24-v/On 0-v/Off†
High 0-v/Off 0-v/Off
High 24-v/On 0-v/Off
High 24-v/On 24-v/On
High 0-v/Off 0-v/Off
High 0-v/Off 0-v/Off
DELAY*
High 0-v/Off†
24-v/On
POINT P1
TEMP. (F)
28.0 80
26.0 75
24.0 70
22.0 65
20.0 60
32.4 86
44
OCCUPIED
VENTMIN
VENTMIN
VENTMIN
VENTMIN
VENTMIN to
Full-Open
VENTMIN to
Full-Open
VENTMIN to
VENTMAX
VENTMIN L to
VENTMAX
VENTMIN H to
VENTMAX
VENTMIN L to
VENTMAX
VENTMIN to
Full-Open
VENTMIN to
Full-Open
DUAL ENTHALPY
HIGH LIMIT
SINGLE ENTHALPY
P2 (T,RH)
P1
(T,RH)
ES4 ES2
ES5 ES3
POINT P2
HUMIDITY
TEMP. (F)
(%RH)
36.8 66.3
39.6 63.3
42.3 59.7
44.8 55.7
46.9 51.3
38.9 72.4
UNOCCUPIED
Closed
Closed
Closed
Closed
Closed to
Full-Open
Closed to
Full-Open
Closed
Closed
Closed
Closed
Closed to
Full-Open
Closed to
Full-Open
ES1
HL
HUMIDITY
(%RH)
80.1
80.0
81.4
84.2
88.5
80.3