216
APPENDIX D — VFD INFORMATION
On units equipped with optional supply fan and/or exhaust fan
VFDs, the fan speed is controlled by a 3-phase VFD. The sup-
ply fan VFD is located in the supply fan section (030-050 size
units) or mixing box section (055-100 size units) behind an ac-
cess door. For 075-100 size units with optional high-capacity
power exhaust or return fan, the exhaust fan VFD is located in
the mixing box section behind an access door.
The P Series units use ABB VFDs. The VFDs communicate to
the
Comfort
Link MBB over the local equipment network
(LEN). The VFD speed is controlled directly by the
Com-
fort
Link controls over the LEN. The interface wiring for the
VFDs is shown in Fig. A and the terminal designations are
shown in Table AA. The VFD has a keypad display panel that
can be used for Service Diagnostics and setting the initial VFD
parameters required to allow the VFD to communicate on the
LEN. Additional VFD parameters are set by the
Comfort
Link
controls and sent to the VFD over the LEN at power up of the
VFD. The VFD faults can be reset with the VFD keypad or
through the
Comfort
Link controls (
Alarms
R.CUR
=Yes).
Table AB outlines the VFD parameters required to initialize
communication over the
Comfort
Link LEN. These parameters
must be set correctly for any communications to occur. These
parameters come preset from the factory. If the VFD is re-
placed, these parameters must be set at the initial power up of
the drive. This can be accomplished by running the Carrier As-
sistant through the VFD keypad (see START UP WITH THE
CARRIER ASSISSTANT section), or setting each of the pa-
rameters individually.
After the parameters in Table AB have been set, the
Com-
fort
Link controls configure the additional parameters listed in
Tables AC and AD automatically. These parameter configura-
tions are sent to the VFD at every power up. The parameters
listed in Table AC have corresponding
Comfort
Link configura-
tions (
Configuration
S.VFD
and
Configuration
E.VFD
).
The parameters in Table AD are hard-coded to be set as listed.
After configuration Tables AC and AD have been sent to the
VFD, the drive continues to send and receive information from
the
Comfort
Link controls. This information is outlined in Ta-
bles AE and AF. Table AE lists the information the VFD sends
to the
Comfort
Link controls, and Table AF lists the information
the
Comfort
Link controls send to the VFD. These tables are
updated at every scan the
Comfort
Link controls perform of the
LEN. This occurs approximately once every second.
Table AA — VFD Terminal Designations
Fig. A — VFD Wiring
TERMINAL
FUNCTION
U1
Three-Phase Main Circuit Input Power Supply
V1
W1
U2
Three-Phase AC Output to Motor, 0 V to Maximum Input Voltage Level
V2
W2
X1-11 (GND)
Factory-supplied jumper
X1-12 (D-COM)
X1-10 (+24 V)
Factory-supplied jumper
X1-13 (DI-1)
X1-10 (+24 V)
Start Enable 1 (Factory-supplied jumper). When opened the drive goes to emergency stop.
X1-16 (DI-4)
X1-28 (SCR)
Factory wired for local equipment network LEN communication
X1-29 (B+)
X1-30 (B-)
X1-31 (AGND)
X1-32 (SCR)
+
24 V
GND
DCOM
DI-1
DI-2
DI-3
DI-4
DI-5
DI-6
SCR
B(+)
A(-)
AGND
SCR
10
11
12
13
14
15
16
17
18
28
29
30
31
32
LEN connection from
Comfort
Link
Terminal X1
Summary of Contents for Weathermaster 48P2030-100
Page 130: ...130 Fig 19 Typical Power Schematic Sizes 040 075 Shown ...
Page 131: ...131 Fig 20 Main Base Board Input Output Connections ...
Page 132: ...132 Fig 21 RXB EXB CEM SCB Input Output Connections ...
Page 133: ...133 Fig 22 Typical Gas Heat Unit Control Wiring 48P030 100 Units Shown ...
Page 134: ...134 Fig 23 Typical Electric Heat Wiring 50P030 100 Units Shown ...
Page 135: ...135 Fig 24 Typical Power Wiring 115 V ...
Page 136: ...136 Fig 25 Typical Gas Heat Section Size 030 050 Units Shown ...
Page 138: ...138 Fig 27 Component Arrangement Size 030 035 Units ...
Page 139: ...139 Fig 28 Component Arrangement Size 040 075 Units ...
Page 140: ...140 Fig 29 Component Arrangement Size 090 100 Units ...