11
English
Observe the following guidelines when installing concentrated
drain piping. Select the diameter of the concentrated drain pip-
ing to reflect the capacity of the units to which it will be con-
nected. (Install a drain trap for each indoor unit.) See Figure
12.
At least 4 in.
Concentrated drain piping
(Use a downward slope of at least 1/100.)
Figure 12
•
If a secondary drain is not installed, the secondary access
must be plugged.
Condensate drain traps with an open vertical Tee between the
cased coil and the condensate drain trap can improve conden-
sate drainage in some applications, but may cause excessive
air discharge out of the open Tee. Daikin does not prohibit this
type of drain but we also do not recommend it due to the result-
ing air leakage. Regardless of the condensate drain design used,
it is the installer’s responsibility to ensure the condensate drain
system is of sufficient design to ensure proper condensate re-
moval from the coil drain pan. Use of a condensate removal
pump is permitted when necessary. This condensate pump
should have provisions for shutting off the control voltage should
a blocked drain occur. See
8.8 Auxiliary Alarm Switch
section
for more details. A trap must be installed between the unit and
the condensate pump.
Drain piping connection
Do not connect drain piping directly to sewage pipes where
ammonia odor may be present. Ammonia in the sewage pipes
may enter the indoor unit body through the drain piping and cor-
rode the heat exchanger.
IMPORTANT NOTE:
The coil is fabricated with oils that may
dissolve styrofoam and certain types of plastics. Therefore, a
removal pump or float switch must not contain any of these ma-
terials.
7.
DUCT WORK
This cased coil is designed for a complete supply and return
ductwork system. To ensure correct system performance, the
ductwork is to be sized to accommodate 350-450 CFM per ton
of cooling with the static pressure not to exceed 0.9” in w.c. and
the gas furnace requirement.
Refer to ACCA Manual D, Manual S and Manual RS for infor-
mation on duct sizing and application. Flame retardant ductwork
is to be used and sealed to the unit in a manner that will prevent
leakage.
7.1
RETURN DUCTWORK
Do not locate the return ductwork in an area that can intro-
duce toxic or objectionable fumes/odors into the ductwork.
The return ductwork is to be connected to the gas furnace.
8.
ELECTRICAL WIRING WORK
IMPORTANT:
All routing of electrical wiring must be made
through provided electrical bushings. When routing electrical
wiring through bushings, take care not to damage the PCB. Do
not cut, puncture or alter the cabinet or control panel for electri-
cal wiring.
•
HIGH VOLTAGE!
Disconnect all power before servicing or installing this unit.
Multiple power sources may be present.
Failure to do so may cause property damage, personal
injury or death.
8.1
GENERAL INSTRUCTIONS
•
Shut off the power before doing any work.
•
All field supplied parts and materials, electric works must
conform to local codes.
•
Use copper wire only.
•
See also the “Wiring Diagram Label” located on the under-
side of the control panel cover.
•
For details on hooking up the remote controller, refer to the
“Remote Controller Installation Manual”.
•
All wiring must be performed by a licensed electrician.
•
This system may consist of multiple indoor units. Mark each
indoor unit as unit A, unit B . . . , and be sure the terminal
board wiring to the outdoor unit is properly matched. If wir-
ing and piping between the outdoor unit and an indoor unit
are mismatched, the system may malfunction.
•
Install a wiring interrupter or ground-fault circuit interrupter
for the power wiring.
•
To avoid short circuiting the power supply wire, be sure to
use insulated terminals.
•
Do not turn on the power supply (wiring interrupter or ground-
fault circuit interrupter) until all other work is done.
•
Do not ground units to water piping, telephone wires or light-
ning rods because incomplete grounding could cause a se-
vere shock hazard resulting in severe injury or death. Do
not ground to gas piping. A gas leak could result causing
an explosion which could lead to severe injury or death.
8.2
WIRE SIZING
Wire size is important to the operation of your equipment. Use
Table 2 when selecting the appropriate wire size for your unit.
•
Wire used must be sized to carry the Minimum Circuit
Ampacity (MCA) listed on the equipment’s Rating Plate.
•
Refer to the NEC (USA) or CSA (Canada) for wire sizing.
•
Wire must be sized to allow no more than a 2% voltage
drop from the building breaker/fuse panel to the unit.
•
Wires with different insulation temperature ratings have vary-
ing ampacities - be sure to check the temperature rating used.
