Carrier 39E - Manual (Page 9)

10. Set power switch at ON so that take-up spool
makes 2 complete turns. Be sure that paper
leader lies flat against media so that as media
winds around core it does not come loose or
bunch up. Be sure that media is free of wrinkles
and travels without snagging. Again, check that
media is routed as shown in Fig. 2.
11. Dual roll sections — Repeat threading pro­
cedure for upper media roll. Note that a second
threading rod and wire are provided. After
upper roll is threaded, about 4 turns of media
will be wound on lower take-up spool. Do not
operate gear motor any more than necessary.
Media cannot be rewound onto supply spool.
12. Set manual override switch at AUTO, as appli­
cable. Then set power switch at ON.
13. Perform operational checks as required. Close
and secure access doors. Refer to air handling
unit operating instructions as applicable.
START-UP
Step 8 — Perform Electrical Control System
Checkout
— Control system designed and factory
set to provide full-span media advancement when
required. Before performing Operational Check,
and Complete Electrical Check, described below, re­
view Roll Filter Description (page 8), Wiring Dia­
grams (Fig. 3 and 4) and Component Description.
Be sure that media is correctly installed and routed
as shown in Fig. 2.
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OPERATIONAL CHECK (all power is off)
1. Automatic Units — set manual override
switch at AUTO.
2. Set media switch at OFF.
3. Turn on power to unit at fused disconnect
switch.
4. Set power switch at ON. Read steps 5, 6 and
7; perform in relatively rapid succession.
5. Set media switch at ON.
Manual Units — Motor should operate.
Automatic Units — Amber operating light
should light up.
6. Automatic Units — Set manual override
switch momentarily at MANUAL. Motor
should operate momentarily.
7. Swing media runout switch arm away from
supply media spool. Depress media runout
switch (micro-switch behind runout arm).
Manual Units — Motor should stop.
Automatic Units — Media runout light (red)
should light up.
8. Release media runout switch. Restore control
circuit to operating status (i.e. media switch at
ON, runout switch at AUTO., power switch at
ON).
COMPLETE ELECTRICAL CHECKOUT to be
performed by a qualified electrician only.
Because it has fewer controls, the complete elec­
trical checkout of a manual roll filter section is the
same as the operational check described above. The
following procedure applies to automatic roll filter
section only.
1. Set power switch at OFF. Turn power off at
external fused disconnect switch.
2. Remove access panel below control panel
(Fig- 2).
3. Restore power at fused external disconnect
switch; set power switch at ON.
4. Perform Operational Check described pre­
viously as required.
5. Connect a 36-in. (approximate) piece of 3/8-in.
tubing to high-pressure tap on control panel
face (Fig. 2).
6. Blow on tube to close pressure switch to simu­
late high pressure caused by dirty filters. Media
advance motor should operate. Refer to Pres­
sure Switch Adjustment described later as
required.
7. Maintain pressure on pressure switch long
enough to perform step 8.
8. As media advances, allow media metering wheel
to revolve thru one revolution. This closes pulse
generator switch and energizes sequence relay
(Fig. 5 and 6). Review Pulse Generator Assem­
bly description as required.
9. Set power switch at OFF. Shut off power at
fused disconnect.
10. Remove tubing from high-pressure tap.
11. Reset sequence relay by manually turning cam
clockwise until relay switch arm drops into
valley of cam (either cam on sizes 75 and 90).
12. Replace control box cover, restore power at
fused disconnect switch and set all switches
as follows:
Media Switch — ON
Manual Override Switch — AUTO.
Power Switch — ON
13. Roll filter section is again ready for automatic
operation. Check that all is in order. Close and
secure access doors before leaving job site.