Refer to Figure 5 for information concerning rear and bottom supply and return air duct openings.
Refer to Figure 5 for location of these access panels and mini- mum clearances.
ROOF CURB
On applications when a roof curb is used, the unit must be posi- tioned on the curb so the front of the unit is tight against the curb.
FILTERS
Single phase units are shipped without a filter and is the responsi- bility of the installer to secure a filter in the return air ductwork or install a Filter/Frame Kit (1FF0110 for the D1NA018 thru D1NA042 and 1FF0112 for the D1NA048 and D2NA060).
A filter rack and filters are standard on three phase units.
NOTE: Filters on the D1NA048 and D2NA060 units require the use of a 516
" nut driver for removal.
Filters must always be used and must be kept clean. When fil- ters become dirt laden, insufficient air will be delivered by the blower, decreasing your units efficiency and increasing operat- ing costs and
Filters should be checked monthly especially since this unit is used for both heating and cooling.
THERMOSTAT
The room thermostat should be located on an inside wall ap- proximately 56" above the floor where it will not be subject to drafts, sun exposure or heat from electrical fixtures or appli- ances. Follow manufacturer's instructions enclosed with the thermostat for general installation procedure. Four color coded insulated wires (minimum #18 AWG) should be used to con- nect thermostat to unit. See Figure 1.
POWER AND CONTROL WIRING
Field wiring to the unit must conform to provisions of the current N.E.C. ANSI/NFPA No. 70 or C.E.C. and/or local ordinances. The unit must be electrically grounded in accordance with local codes or, in their absence, with the N.E.C./C.E.C. Voltage tol- erances which must be maintained at the compressor termi- nals during starting and running conditions are indicated on the unit Rating Plate and Table 8.
The wiring entering the cabinet must be provided with me- chanical strain relief.
A fused disconnect switch should be field provided for the unit. If any of the wire supplied with the unit must be replaced, replace- ment wire must be of the type shown on the wiring diagram.
CONDENSATE DRAIN
A condensate trap is recommended to be installed in the con- densate drain. The plumbing must conform to local codes. Use a sealing compound on male pipe threads. Install the conden- sate drain line (34
“ NPTF) to spill into an open drain.
Electrical line must be sized properly to carry the load. Each unit must be wired with a separate branch circuit fed directly from the meter panel and properly fused.
SERVICE ACCESS
Access to all serviceable components is provided by the follow- ing removable panels:
•Blower compartment
•Gas control/electrical service access
Refer to Figure 1 for typical field wiring and to the appropriate unit wiring diagram for control circuit and power wiring information.
COMPRESSORS
Units are shipped with compressor mountings
THERMOSTAT | CONTROL WIRING | |
** = Minimum wire size of 18 AWG | R | R |
wire shuold be used for all field |
|
|
installed 24 volt wire. | G | G |
| ||
PROGRAMABLE | Y | Y |
THERMOSTAT ONLY |
|
|
| W | W |
NOTE:
HEAT ANTICIPATOR
SHOULD BE SET AT 0.35
AMPS FOR ALL MODELS.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.
CC
P O W E R
WIRING
REFER TO ELECTRICAL
DATA TABLES TO SIZE THE
DISCONNECT SWITCH,
WIRING & OVERCURRENT
FIG. 1 - TYPICAL FIELD WIRING DIAGRAM
4 | Unitary Products Group |
