25
Table 30 — Service Test
THIRD PARTY CONTROL
Thermostat —
The method of control would be through
the thermostat inputs:
Y1 = first stage cooling
Y1 and Y2 = first and second stage cooling
W1 = first stage heating
W1 and W2 = first and second stage heating
G = supply fan
Alarm Output —
The alarm output TB4-7 and 8, will pro-
vide relay closure whenever the unit is under an alert or alarm
condition.
Remote Switch —
The remote switch may be configured
for three different functions. Under
Configuration
UNIT,
set
RM.CF
to one of the following:
0 = no remote switch
1 = occupied/unoccupied switch
2 = start/stop switch
3 = occupancy override switch
With
RM.CF
set to 1, no time schedules are followed and
the unit follows the remote switch only in determining the state
of occupancy.
With
RM.CF
set to 2, the remote switch can be used to shut
down and disable the unit, while still honoring time guards on
compressors. Time schedules, internal or external, may be run
simultaneously with this configuration.
With
RM.CF
set to 3, the remote input may override an
unoccupied state and force the control to go into occupied
mode. As with the start/stop configuration, an internal or exter-
nal time schedule may continue to control occupancy when the
switch is not in effect.
Under
Configuration
SW.LG
RMI.L
, the remote occu-
pancy switch can be set to either a normally open or normally
closed switch input. Normal is defined as either unoccupied, start
or “not currently overridden,” respective to the
RM.CF
configuration.
VFD Control —
On VFD equipped supply fans, supply
duct static pressure control may be left under unit control or be
externally controlled. To control a VFD externally with a 4 to
20 mA signal, set
SP.RS
to 4, under the
Configuration
SP
menu. This will set the reset to VFD control. When
SP.RS
= 4,
the static pressure reset function acts to provide direct VFD
speed control where 4 mA = 0% speed and 20 mA = 100%
(
SP.MN
and
SP.MX
will override). Note that
SP.CF
must be
set to 1 (VFD Control) prior to configuring
SP.RS
= 4. Failure
to do so could result in damage to ductwork due to overpressur-
ization. In effect, this represents a speed control signal “pass
through” under normal operating circumstances. The
Com-
fort
Link controller overrides the third party signal for critical
operation situations, most notably smoke and fire control. Wire
the input to the controls expansion module (CEM) using TB-11
and 12. An optional CEM board is required.
See Appendix C and the VFD literature supplied with the unit
for VFD configurations and field wiring connections to the VFD.
Supply Air Reset —
With the installation of the CEM,
the
Comfort
Link controller is capable of accepting a 4 to
20 mA signal, to reset the supply-air temperature up to a maxi-
mum of 20 F. See VFD Control section above.
Demand Limit Control —
The term “demand limit
control” refers to the restriction of the machine’s mechanical
cooling capacity to control the amount of power that a machine
may use.
ITEM
EXPANSION
RANGE
UNITS
POINT
WRITE STATUS
TEST
Service Test Mode
ON/OFF
MAN_CTRL
STOP
Local Machine Disable
YES/NO
UNITSTOP
config
S.STP
Soft Stop Request
YES/NO
SOFTSTOP
forcible
FAN.F
Supply Fan Request
YES/NO
SFANFORC
forcible
F.4.CH
4 in. Filter Change Mode
YES/NO
FILT4CHG
INDP
TEST INDEPENDENT OUTPUTS
ECN.C
Economizer Act.Cmd.Pos.
ECONCTST
E.PWR
Economizer Power Test
ECONPTST
E.CAL
Calibrate the Economizer?
ECON_CAL
PE.A
Power Exhaust Relay A
PE_A_TST
PE.B
Power Exhaust Relay B
PE_B_TST
PE.C
Power Exhaust Relay C
PE_C_TST
H.I.R
Heat Interlock Relay
ON/OFF
HIR_TST
ALRM
Remote Alarm/Aux Relay
ON/OFF
ALRM_TST
FANS
TEST FANS
S.FAN
Supply Fan Relay
ON/OFF
SFAN_TST
S.VFD
Supply Fan VFD Speed
0-100
%
SGVFDTST
CD.F.A
Condenser Fan Circuit A
ON/OFF
CNDA_TST
CD.F.B
Condenser Fan Circuit B
ON/OFF
CNDB_TST
A.VFD
MtrMaster A Commanded %
0-100
%
OAVFDTST
B.VFD
MtrMaster B Commanded %
0-100
%
OBVFDTST
MMF.A
MtrMaster Fan Circuit A
ON/OFF
MM A TST
MMF.B
MtrMaster Fan Circuit B
ON/OFF
MM B TST
COOL
TEST COOLING
A1
Compressor A1 Relay
ON/OFF
CMPA1TST
A2
Compressor A2 Relay
ON/OFF
CMPA2TST
MLV
Min. Load Valve (HGBP)
ON/OFF
MLV_TST
DS.CP
Digital Scroll Capacity
20-100
%
DSCAPTST
B1
Compressor B1 Relay
ON/OFF
CMPB1TST
B2
Compressor B2 Relay
ON/OFF
CMPB2TST
RHV
Humidimizer 3-Way Valve
ON/OFF
RHVH_TST
C.EXV
Condenser EXV Position
0-100
%
CEXVHTST
B.EXV
Bypass EXV Position
0-100
%
BEXVHTST
HEAT
TEST HEATING
HT.ST
Requested Heat Stage
0-MAX
HTST_TST
HT.1
Heat Relay 1
ON/OFF
HS1_TST
HT.2
Heat Relay 2
ON/OFF
HS2_TST
HT.3
Relay 3 W1 Gas Valve 2
ON/OFF
HS3_TST
HT.4
Relay 4 W2 Gas Valve 2
ON/OFF
HS4_TST
HT.5
Relay 5 W1 Gas Valve 3
ON/OFF
HS5_TST
HT.6
Relay 6 W2 Gas Valve 3
ON/OFF
HS6_TST
HMZR
TEST HUMIDI-MIZER
RHV
Humidimizer 3-Way Valve
ON/OFF
RHVH_TST
C.EXV
Condenser EXV Position
0-100
%
CEXVHTST
B.EXV
Bypass EXV Position
0-100
%
BEXVHTST
C.CAL
Condenser EXV Calibrate
ON/OFF
CEXV_CAL
B.CAL
Bypass EXV Calibrate
ON/OFF
BEXV_CAL
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...
