8
tion). Two check valves with hex nipple fittings
come packaged with the Air Dryer. If using only
one Air Outlet, install the Check Va l ve marked with
P/N 47744 Flow Restrictor Check Valve label at
the outlet. NOTE: the direction of the large arrow
indicates main airflow. This check valve has been
modified with a small orifice to allow feedback of
dry air into Standby Air Dryers that are on Trans-
fer/Cycling Systems.
6.6 Verify that the Power Switch on the front control
panel is in the OFF position. Locate the Alarm/ATS
Interface Board and remove the battery insulation
boot prior to turning on the Air Dryer. See Appendix
A for battery location.
WARNING!
RISK OF ELECTROCUTION - Disconnect from
electrical power before starting this proceedure.
- - - NOTE - - -
An External Surge Protection Device should be
used when operating this device. This Equipment
is suitable for Common or Isolated Bonding and
for Network Telecommunication Facilities and
locations where NEC applies.
6.6.1 Instructions for Model 22000ST only:
The 22000ST operates on 208-240 VA C , 1 Ph.
power. Route the power cord (not provided) to a
wall mounted listed electrical disconnect box, or
alternately, install an appropriate twist lock connec-
tor on the cord and install a mating connector at the
wall or on a free-hanging power cord. At the rear of
the air dryer route the cable through the strain relief
and into the power entrance box.
Connect the power cord BLACK lead to L1 of
Terminal Board.
Connect the other BLACK lead (or WHITE lead
with marker) to L2 of the Terminal Board.
Connect the GREEN lead to the Ground Stud.
(see appendix "G" for proper grounding to the
ground stud).
6.6.2 Instruction for Model 33000ST only:
The Model 33000ST operates on 208/240 VAC , 3
Ph. power. Route the power cord (not provided) to
a wall mounted listed electrical disconnect box, or
alternately, install an appropriate twist lock connec-
tor on the cord and install a mating connector at the
wall or on a free-hanging power cord. At the rear
of the air dryer, route the cable through the strain
relief and into the power entrance box.
Connect the power cord BLACK lead to L1 of
the Terminal Board.
Connect the BLUE lead (or white with blue
marker) to L2 of the Terminal Board.
Connect the RED lead to L3 of the Ter minal
Board.
Connect the GREEN lead to the Ground Stud.
(see appendix "G" for proper grounding to the
ground stud)
6.6.3 The Power Switch
(6) on the Front Control
Panel MUST
REMAIN OFF u ntil performing the
start up procedure described in Paragraph 7.7.
6.7 If the electrical supply voltage is 200 volts or
lower, a purge valve malfunction may occur. See
the Parts List for special solenoid coils for this par-
ticular installation.
6.8 Two CO summary alarm termination blocks
are located at the rear of the Air Dryer. These are
factory configured for either close or open circuit in
alarm. Both are dry contact with a rating of up to 10
amps at 125 VAC and are isolated from each other
for different monitoring systems. Two additional
Alarm Options for CO#1 terminal block (only) may
be user configured. The choice is 540K ohms clear
with 270K ohms alarm indication or 270K ohm clear
with 0 ohm (short) alarm indication. Two jumpers
are easily set on the circuit board with the monitor-
ing system wired to the common and CIA (closed in
alarm) terminal block. See Appendix A for optional
Alarm Configuration.
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