77
Table 77 — Remote Switch Logic Configuration
Hot Gas Bypass —
Hot gas bypass is an active part of
the A Series
Comfort
Link capacity staging and minimum
evaporator load protection functions. It is controlled though the
Minimum Load Valve function.
The hot gas bypass option consists of a solenoid valve with
a fixed orifice sized to provide a nominal 3-ton evaporator load
bypass. A hot gas refrigerant line routes the bypassed hot gas
from Circuit A’s discharge line to Circuit A’s evaporator
distributor. When the unit control calls for hot gas bypass, the
hot gas enters the evaporator coil and adds refrigeration load
to the compressor circuit to reduce the cooling effect from
Circuit A.
The hot gas bypass system is a factory-installed option
installed on Circuit A only. This function is enabled at
Config-
uration
COOL
MLV
. When this function is enabled, an
additional stage of cooling capacity is provided by the unit
control staging sequences (see Tables 38, 39, 43, and 45).
Space Temperature Offset —
Space temperature off-
set corresponds to a slider on a T56 sensor that allows the occu-
pant to adjust the space temperature by a configured range
during an occupied period. This sensor is only applicable to
units that are configured as either 2-Stage SPT or Multi-Stage
SPT control (
Configuration
UNIT
C.TYP
= 5 or 6).
Space Temperature Offset Sensor
(
Configuration
UNIT
SENS
SP.O.S
) — This configuration disables the reading
of the offset slider.
Space Temperature Offset Range
(
Configuration
UNIT
SENS
SP.O.R
) — This configuration establishes
the range, in degrees F, that the T56 slider can affect
SPTO
when adjusting the slider from the far left (
-
SP.O.R
) to the far
right (+
SP.O.R
). The default is 5° F.
Space Temperature Offset Value
(
Temperatures
AIR.T
SPTO
) — The Space Temperature Offset Value is the read-
ing of the slider potentiometer in the T56 that is resolved to
delta degrees based on
SP.O.R
.
TIME CLOCK CONFIGURATION
This section describes each Time Clock menu item. Not
every point will need to be configured for every unit. Refer to
the Controls Quick Start section for more information on what
setpoints need to be configured for different applications. The
Time Clock menu items are discussed in the same order that
they are displayed in the Time Clock table. The Time Clock
table is shown in Table 78.
Hour and Minute (
HH.MM
) —
The hour and minute
of the time clock are displayed in 24-hour, military time. Time
can be adjusted manually by the user. When connected to the
CCN, the unit can be configured to transmit time over the
network or receive time from a network device. All devices on
the CCN should use the same time. Only one device on the
CCN should broadcast time or problems will occur.
Month of Year (
MNTH
) —
This variable is the current
month of the calendar year.
Day of Month (
DOM
) —
This variable is the current
day (1 to 31) of the month.
Day of Week (
DAY
) —
This variable is the current day
of the week (Monday = 1 through Sunday = 7).
Year (
YEAR
) —
This variable is the current year (for ex-
ample, 2005).
Local Time Schedule (
SCH.L
) —
This submenu is
used to program the time schedules. There are 8 periods
(
PER.1
through
PER.8
). Each time period can be used to set
up a local schedule for the unit.
Monday In Period (
PER.X
DAYS
MON
) — This vari-
able is used to include or remove Monday from the schedule.
Each period is assigned an occupied on and off time. If this
variable is set to YES, then Monday will be included in that peri-
od’s occupied time schedule. If this variable is set to NO, then
the period’s occupied time schedule will not be used on Monday.
This variable can be set for Periods 1 through 8.
Tuesday In Period (
PER.X
DAYS
TUE
) — This variable
is used to include or remove Tuesday from the schedule. Each
period is assigned an occupied on and off time. If this variable
is set to YES, then Tuesday will be included in that period’s oc-
cupied time schedule. If this variable is set to NO, then the peri-
od’s occupied time schedule will not be used on Tuesday. This
variable can be set for Periods 1 through 8.
Wednesday In Period (
PER.X
DAYS
WED
) — This
variable is used to include or remove Wednesday from the
schedule. Each period is assigned an occupied on and off time.
If this variable is set to YES, then Wednesday will be included
in that period’s occupied time schedule. If this variable is set to
NO, then the period’s occupied time schedule will not be used
on Wednesday. This variable can be set for Periods 1 through 8.
Thursday In Period (
PER.X
DAYS
THU
) — This vari-
able is used to include or remove Thursday from the schedule.
Each period is assigned an occupied on and off time. If this
variable is set to YES, then Thursday will be included in that
period’s occupied time schedule. If this variable is set to NO,
then the period’s occupied time schedule will not be used on
Thursday. This variable can be set for Periods 1 through 8.
Friday In Period (
PER.X
DAYS
FRI
) — This variable is
used to include or remove Friday from the schedule. Each peri-
od is assigned an occupied on and off time. If this variable is set
to YES, then Friday will be included in that period’s occupied
time schedule. If this variable is set to NO, then the period’s oc-
cupied time schedule will not be used on Friday. This variable
can be set for Periods 1 through 8.
Saturday In Period (
PER.X
DAYS
SAT
) — This vari-
able is used to include or remove Saturday from the schedule.
Each period is assigned an occupied on and off time. If this
variable is set to YES, then Saturday will be included in that
period’s occupied time schedule. If this variable is set to NO,
REMOTE
SWITCH LOGIC
CONFIGURATION
(
RMI.L
)
SWITCH
STATUS
REMOTE INPUT STATE
(REMT)
REMOTE SWITCH CONFIGURATION (
RM.CF
)
0
1
2
3
No Remote Switch
Occ-Unocc Switch
Start/Stop
Override
OPEN
OPEN
OFF
xxxxx
Unoccupied
Start
No Override
CLOSED
ON
xxxxx
Occupied
Stop
Override
CLOSED
OPEN
ON
xxxxx
Occupied
Stop
Override
CLOSED
OFF
xxxxx
Unoccupied
Start
No Override
ITEM
EXPANSION
RANGE
UNITS
CCN
POINT
SP.O.S
Space Temp
Offset Sensor
Enable/
Disable
SPTOSENS
SP.O.R
Space Temp
Offset Range
1 - 10
SPTO_RNG
SPTO
Space Temperature
Offset
+-
S
P.O.R
^F
SPTO
Содержание Carrier Weathermaker 48A2
Страница 105: ...105 Fig 20 Typical Main Control Box Wiring Schematic 48 50A2 A3 A4 A5 Units...
Страница 106: ...106 Fig 21 Typical Auxiliary Control Box Wiring Schematic...
Страница 107: ...107 Fig 22 Typical 2 Stage Gas Heat Wiring Schematic Size 060 Units Shown a48 8357...
Страница 108: ...108 TO NEXT PAGE Fig 23 Typical Staged Gas Heat Wiring Schematic Size 060 Units Shown A48 7296...
Страница 109: ...109 Fig 23 Typical Staged Gas Heat Wiring Schematic Size 060 Units Shown cont A48 8358...
Страница 110: ...110 Fig 24 Typical Electric Heat Control Schematic 50 Series Size 060 Units Shown a50 8228...
Страница 111: ...111 Fig 25 Typical Power Schematic 48 50A2 A3 A4 A5 060 Unit Shown...
Страница 112: ...112 Fig 26 Typical Low Ambient Controls Option Wiring...
Страница 113: ...113 Fig 27 Typical Small Chassis Component Location Size 020 035 Units...
Страница 114: ...114 Fig 28 Typical Large Chassis Component Locations Size 040 060 Units...
Страница 118: ...118 Fig 30 Economizer Control Board ECB1 and VAV Control Board ECB2 A48 7706...
Страница 142: ...142 A48 3733 Fig 56 Main Burner Removal...
Страница 176: ...176 APPENDIX C VFD INFORMATION cont Fig F Internal Enclosure Fan Replacement A48 7716...
