Daikin DBG Series Service Instructions Manual page 16

SYSTEM OPERATION
Base Rail
Open Vent
2" Min
NOTE: Trap should be deep enough to offset maximum
unit static difference. A minimum 4" trap is recommended.
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
. D
ACCEPTABLE MEANS ISCONNECT ALL POWER BEFORE
SERVICING OR INSTALLING THIS UNIT
T
O PREVENT PROPERTY DAMAGE OR PERSONAL INJURY
THE UNIT UNTIL ALL NECESSARY PRE
.
PERFORMED
16
See NOTE
Drain Plug
WARNING
.
CAUTION
, D
O NOT START
-
CHECKS AND TEST HAVE BEEN
MOVING MACHINERY HAZARD!
T
O PREVENT POSSIBLE PERSONAL INJURY OR DEATH
POWER TO THE UNIT AND PADLOCK IN THE
SERVICING FANS
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.
Roof Curb
• 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.
WARNING
"OFF"
.
,
DISCONNECT
POSITION BEFORE