M-Series Technical Manual
73
Cambridge Air Solutions
INITIAL START-UP:
Procedure:
1. Turn unit Disconnect Switch to the “OFF” position
and test to verify there is no electricity to the unit and
ensure proper grounding. INSPECT AND TIGHTEN
ALL ELECTRICAL AND WIRE TERMINALS.
2. Check all wire and plumbing connections for proper
installation.
3. Fill sump tank with water and adjust float to ½ inch
below overflow drain.
4. Check for leaks in sump, water distribution piping,
and float operation.
5. The factory-installed freeze thermostat sensing tube
(located inside electric panel) senses the outdoor
ambient air. The 45 degree factory setting is
adjustable.
WARNING:
Whenever power is interrupted, the 24-hour clock
must be reset to local time.
6. Check that the fill and drain valve are installed and
wired to the 24-hour timer and freeze stat. Set the
24-hour fill and drain timer to local time. The drain
and refill feature is factory set to turn off the sump
for 1 hour between 4 am to 5 a.m., and is manually
adjustable to User’s requirements.
7. Turn power to unit on leaving unit disconnect "OFF".
Check for any shorts.
8. Check that line and sump pump voltages and
amperages are per the nameplate. Record supply
voltage and amperage. .
9. Turn the unit disconnect "ON".
10. Confirm the Time Delay has been set to 1 minute on
the sump pump(s).
11. Verify the Low Water Level float switch located in
sump is working properly and will turn the pump(s)
on.
12. Start-up the fan per manufacturer’s instructions. After
both the fan and sump are running and operating
properly, check that water is not being carried over
into the airstream from the media pads or sump.
Check fan rotation. Cycle damper actuators to ensure
they open and close freely.
If there is water carryover from the media pads
perform the following procedure:
13. Check for proper positioning of media pads (the sides
of pads are arrows marking the direction or air flow.
If media pads are correctly positioned then check
for air bypassing between the media pads and their
frames. If air is bypassing, then place a strip of foam
gasketing between the media pads and side channel
to compress the media pads and fill the gap.
14. After twenty (20) minutes observe media for
complete wetting and check that there are no dry
streaks. Open balancing valve more to increase water
flow and close valve as necessary to reduce water
flow to media pads (Initial factory set position of
valve is ½ open).
15. After running Cambridge Air Solutions DEC for
(1) week adjust factory pre-set bleed valve(s).
This process allows the pump to discharge the
concentration of solids in the water. Bleed valve is
located on the discharge portion of the pump and is
connected to a 3/8” drain tube. Drain tube should
always be positioned inside the overflow drain. Use
the following procedure to set bleed valve:
a.
Completely turn the bleed
valve(s) open. This allows
the pump to discharge the
concentration of solids in the
water.
b.
Close the bleed valve(s) and
count the number of turns
required.
c.
Set bleed valve(s) to ½ open
position.
d.
Check that bleed lines(s) are
connected to overflow drain.
e.
Increase water flow rate if
there are scale deposits on the
media pads. Check for water
carryover afterwards and adjust
if necessary.
f.
If there are dry streaks in the
media then remove distribution
header and any debris blocking
the distribution holes.
