SYSTEM OPERATION
16
NOTE:
Trap should be deep enough to offset maximum
unit static difference. A minimum 4” trap is recommended.
Drain Plug
Roof Curb
See NOTE
Base Rail
Open Vent
2” Min
Drain Connection
Install condensate drain trap as shown. Use 1" drain line and
fittings or larger. Do not operate without trap.
Horizontal Drain
Drainage of condensate directly onto the roof may be ac-
ceptable; refer to local code. It is recommended that a small
drip pad of either stone, mortar, wood or metal be provided
to prevent any possible damage to the roof.
Cleaning
Due to the fact that drain pans in any air conditioning unit will
have some moisture in them, algae and fungus will grow due
to airborne bacteria and spores. Periodic cleaning is necessary
to prevent this build-up from plugging the drain.
STARTUP, ADJUSTMENTS, AND CHECKS
HIGH VOLTAGE!
T
O
AVOID
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRICAL
SHOCK
,
BOND
THE
FRAME
OF
THIS
UNIT
TO
THE
BUILDING
ELECTRICAL
GROUND
BY
USE
OF
THE
GROUNDING
TERMINAL
PROVIDED
OR
OTHER
ACCEPTABLE
MEANS
. D
ISCONNECT
ALL
POWER
BEFORE
SERVICING
OR
INSTALLING
THIS
UNIT
.
WARNING
T
O
PREVENT
PROPERTY
DAMAGE
OR
PERSONAL
INJURY
, D
O
NOT
START
THE
UNIT
UNTIL
ALL
NECESSARY
PRE
-
CHECKS
AND
TEST
HAVE
BEEN
PERFORMED
.
CAUTION
MOVING MACHINERY HAZARD!
T
O
PREVENT
POSSIBLE
PERSONAL
INJURY
OR
DEATH
,
DISCONNECT
POWER
TO
THE
UNIT
AND
PADLOCK
IN
THE
“OFF”
POSITION
BEFORE
SERVICING
FANS
.
WARNING
Contractor Responsibility
The installing contractor must be certain that:
•
All supply and return air ductwork is in place, properly
sealed, and corresponds with installation instructions.
•
All thermostats are mounted and wired in accordance
with installation instructions.
•
All electric power, all gas, hot water or steam line con-
nections, and the condensate drain installation have
been made to each unit on the job. These main supply
lines must be functional and capable of operating all
units simultaneously.
•
Requirements are met for venting and combution air.
•
Air filters are in place.
•
Input rate and temperature rise are adjusted per rating
plate.
• Return air temperature is maintained between 55°F
(13°C) and 80°F (27°C).
Roof Curb Installation Check
Inspect the roof curb for correct installation. The unit and curb
assembly should be level. Inspect the flashing of the roof
mounting curb to the roof, especially at the corners, for good
workmanship. Also check for leaks around gaskets. Note any
deficiencies in a separate report and forward to the contractor.
Obstructions, Fan Clearance and Wiring
Remove any extraneous construction and shipping materials
that may be found during this procedure. Rotate all fans man-
ually to check for proper clearances and that they rotate freely.
Check for bolts and screws that may have jarred loose during
shipment to the job site. Retighten if necessary. Re-tighten
all electrical connections.
Field Duct Connections
Verify that all duct connections are tight and that there is no
air bypass between supply and return.
Filter Section Check
Remove filter section access panels and check that filters
are properly installed. Note airflow arrows on filter frames.
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