Controls, Start-Up, Operation, Service and ... - Climayoreo
Controls, Start-Up, Operation, Service and ... - Climayoreo
Controls, Start-Up, Operation, Service and ... - Climayoreo
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On units equipped with optional supply fan <strong>and</strong>/or exhaust<br />
fan VFDs, the fan speed is controlled by a 3-phase VFD. The<br />
supply fan VFD is located in the supply fan section (030-050<br />
size units) or mixing box section (055-100 size units) behind an<br />
access door. For 075-100 size units with optional high-capacity<br />
power exhaust or return/exhaust fan, the exhaust fan VFD is located<br />
in the mixing box section behind an access door.<br />
The P-Series units use ABB VFDs. The VFDs communicate<br />
to the ComfortLink MBB over the local equipment network<br />
(LEN). The VFD speed is controlled directly by the<br />
ComfortLink controls over the LEN. The interface wiring for<br />
the VFDs is shown in Fig. A <strong>and</strong> the terminal designations are<br />
shown in Table A. The VFD has a keypad display panel that<br />
can be used for <strong>Service</strong> Diagnostics <strong>and</strong> setting the initial VFD<br />
parameters required to allow the VFD to communicate on the<br />
LEN. Additional VFD parameters are set by the ComfortLink<br />
controls <strong>and</strong> sent to the VFD over the LEN at power up of the<br />
VFD. The VFD faults can be reset with the VFD keypad or<br />
through the ComfortLink controls (AlarmsR.CUR =Yes).<br />
Table B outlines the VFD parameters required to initialize<br />
communication over the ComfortLink LEN. These parameters<br />
must be set correctly for any communications to occur. These<br />
APPENDIX D — VFD INFORMATION<br />
Table A — VFD Terminal Designations<br />
194<br />
parameters come preset from the factory. If the VFD is replaced,<br />
these parameters must be set at the initial power up of<br />
the drive. This can be accomplished by running the Carrier Assistant<br />
through the VFD keypad (see START UP WITH THE<br />
CARRIER ASSISSTANT section), or setting each of the parameters<br />
individually.<br />
After the parameters in Table B have been set, the ComfortLink<br />
controls configure the additional parameters listed in<br />
Tables C <strong>and</strong> D automatically. These parameter configurations<br />
are sent to the VFD at every power up. The parameters listed in<br />
Table C have corresponding ComfortLink configurations<br />
(ConfigurationS.VFD <strong>and</strong> ConfigurationE.VFD). The<br />
parameters in Table D are hard-coded to be set as listed.<br />
After configuration Tables C <strong>and</strong> D have been sent to the<br />
VFD, the drive continues to send <strong>and</strong> receive information from<br />
the ComfortLink controls. This information is outlined in Tables<br />
E <strong>and</strong> F. Table E lists the information the VFD sends to the<br />
ComfortLink controls, <strong>and</strong> Table F lists the information the<br />
ComfortLink controls send to the VFD. These tables are updated<br />
at every scan the ComfortLink controls perform of the LEN.<br />
This occurs approximately once every second.<br />
TERMINAL FUNCTION<br />
U1 Three-Phase Main Circuit Input Power Supply<br />
V1<br />
W1<br />
U2 Three-Phase AC Output to Motor, 0 V to Maximum Input Voltage Level<br />
V2<br />
W2<br />
X1-11 (GND) Factory-supplied jumper<br />
X1-12 (D-COM)<br />
X1-10 (+24 V) Factory-supplied jumper<br />
X1-13 (DI-1)<br />
X1-10 (+24 V) <strong>Start</strong> Enable 1 (Factory-supplied jumper). When opened the drive goes to emergency stop.<br />
X1-16 (DI-4)<br />
X1-28 (SCR) Factory wired for local equipment network LEN communication<br />
X1-29 (B+)<br />
X1-30 (B-)<br />
X1-31 (AGND)<br />
X1-32 (SCR)<br />
+24 V<br />
GND<br />
DCOM<br />
DI-1<br />
DI-2<br />
DI-3<br />
Terminal X1<br />
DI-4<br />
10 11 12 13 14 15 16 17 18 28 29 30 31 32<br />
DI-5<br />
DI-6<br />
Fig. A — VFD Wiring<br />
SCR<br />
B(+)<br />
A(-)<br />
AGND<br />
SCR<br />
LEN connection from ComfortLink