Alpha Technologies CFR 1500, CFR 2000, CFR 2500, CFR 3000 - Manual (Page 29)

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In North America, there are only two recognized supply voltages: 208 VAC
(most commonly used in industrial, commercial, and office areas); and 2 0 VAC
(most commonly used in residential areas). 120 VAC can be derived from both 208
and 2 0 VAC services.
NOTE: The terms 220 VAC and 230 VAC are actually local terminology,
referring to 2 0 VAC service.
IMPORTANT:
This unit complies with NEC/CEC for center tapped neutral bond to ground.
VOLTAGE POTENTIAL
UPS units equipped for 208 VAC output operation have a 208 VAC potential
between L1 and L2. In comparison, when the UPS is wired for 2 0 VAC output, a
120 VAC potential appears
between L2 and Neutral, and L1 and Neutral. For
further information, contact Alpha for assistance.
The transformer used in the CFR UPS is equipped with an additional
tap (L1 to N) for 120 VAC operation. This provides a dual output volt
age potential of 208 VAC and 120 VAC. Note: In this configuration,
the voltage potential between L2 (208 VAC) and Neutral is only
88
VAC. Refer to the illustration below.
LOAD SHARING
If several pieces of equipment are connected to the 120 V output of the CFR
(either to the output receptacle or terminal block), care must be taken to ensure that
the total power drawn does not exceed the maximum rating of the unit. For
Terminal block output, wherever possible, connect all 120V loads to L1 (not L2). If
120 V loads are connected to L2, do not exceed the current listed in Table 3. .1.
3.4 208 VAC vs 240 VAC (60 Hz) Configurations
3. INSTALLATION
Table 3.4.1
Model Maximum current on L2
CFR 1500 7.2A
CFR 2000 9.6A
CFR 2500 12.0A
CFR 3000 1 . A
5. RS-232 TERMINAL COMMUNICATION
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Cancel Output Shutdown
This command cancels any pending or current UPS output shutdown.
This command requires the USER SECURITY CODE.
Recover Output Shutdown Only When AC Line Restored (xxx)
xxx=“Yes” or “No”, (Default value is “Yes”)
This command determines when the CFR restores output power after
a output shutdown. If this option is set to “Yes”, the UPS restores output
when the input AC line is restored. Note that the output is guaranteed to be
off for the
“Output Shutdown Duration” period. During this period, the CFR
will not activate the output, even if AC line is restored. However, if this
option is set to “No”, then the CFR activates its output as soon as the
“Output Shutdown Duration” has expired. Thus, the CFR may even restore
output in the inverter mode. Changing this option requires the USER
SECURITY CODE.
Set Output Shutdown Delay (HH:MM:SS= hh:mm:ss)
This command sets the “output shutdown delay” period. After the
CFR receives an output shutdown command, it will wait for this period
before switching off the output.
hh:mm:ss - hh is hours; mm is minutes; ss is seconds. Entering the
seconds is optional, (i.e., HH:MM format is also acceptable). The factory
default setting for this value is 00:00:00 which causes the CFR to immedi-
ately shutdown when a shutdown command is set. If the CFR is set to start
shutdown when delay is set (menu item 501 is set to “Yes”), then it also
acts as a shutdown command, and the count down for shutting down the
unit starts immediately (there is no need to issue a 502 command). This
feature requires the USER SECURITY CODE for activation.
Set Output Shutdown Duration (HH:MM:SS= hh:mm:ss)
This command sets the “Output Shutdown Duration” which is the
guaranteed down time after an output shutdown.
hh:mm:ss - hh is hours; mm is minutes; ss is seconds. Entering the
seconds is optional, (i.e. HH:MM format is also acceptable). The factory
default setting for this value is 00:00:05 which causes the CFR to remain in
shutdown for a minimum of 5 seconds. The CFR may restore output
immediately when this duration is expired, or may wait for the AC line to be
restored (depending on the setting of menu item 50 ). This feature
requires the USER SECURITY CODE for activation.
Shut Off Inverter / Save Battery
This feature requires the USER SECURITY CODE and can only be
activated if unit is in LINE FAILURE mode. The inverter can then be shut
off to preserve battery power if its no longer necessary to back up the load.
Upon return of the line voltage, the unit will then resume operation as
normal.
Start-up Inverter From Save Battery
This feature requires the USER SECURITY CODE and can be
activated only if the inverter was shut off from save battery (507). The
inverter then can be restarted to provide power to the load.
503
504
5.9 User Parameters, continued
505
506
508
507