54
BAS-SVX080B-EN
Table 15.
Complete list of manual override selections – cprsr control button (continued)
Manual Enable Cprsr1A
(b)
Off / On
Manual Enable Cprsr2B
(b)
Off / On
Manual Enable Cprsr1B
(b)
Off / On
Manual Enable Cprsr2A
Off / On
Manual Enable Cprsr1B
(b)
Off / On
(a)
Compressor Control Manual Override must be set to Manual before compressors are placed in manual override.
(b)
Manual Override Control of Compressors are setup in Stop mode, and will only be turned On in Auto mode.
Beginning a Manual Override Event
N
No
otte
e:: Please consider the following when applying manual overrides to the Supply and Relief
fans. The F
Fa
an
n S
Sp
pe
ee
ed
d C
Co
om
mm
ma
an
nd
d value entered on these screens has a range of 0 to 100%.
This commanded value range equates to Minimum Speed (min%) thru Maximum Speed
(Hz or RPM) of the selected fan when the C
Cu
urrrre
en
ntt V
Va
allu
ue
e: is M
Ma
an
nu
ua
all, and the fan is
operating. The Speed Status shown is in percent where 0% equates to fan Off, (min%)
equates to fan operating at minimum speed, and 100% equates to fan operating at
maximum speed. See and . below for example fan motor commands and status.
Table 16.
Fan manual override command and status - example
Fan Motor
Speed
Parameter
Min Speed
Setup
Max Speed
Setup
Fan Speed
Command
Fan
Minimum
Speed (min
%)
Fan
Maximum
Speed
Fan Speed
Status
Hz
23 Hz
(a)
60 Hz
(a)
0%
38.30%
100%
38.30%
RPM
120 RPM
(b)
1010 RPM
(c)
65.40%
11.90%
100%
69.50%
(a)
The Supply fan(s) motor’s minimum and maximum speed setup, in Hz, are entered via the VFD’s keypad.
(b)
The Relief fan EBM motor’s minimum speed setup, in RPM, is set to 10% of motor nameplate speed and is not adjustable.
(c)
The Relief Fan motor’s maximum speed setup is set to the RPM value entered at the TD7 display’s
Settings – Unit Settings
– Service Settings
menu button for
Relief Fan Maximum Speed Setpoint
.
Figure 44.
Relief Fan Manual Override screen - example
To begin a manual override event:
1. If necessary, press the S
Stto
op
p button on the TD7 display.
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