Application Limitations
Outdoor Ambient Air Temperature °F
Minimum DB - Cooling | Maximum DB |
Cool Heat
65
12575
| Indoor Ambient | Air Temperature °F | I |
Minimum | Maximum |
| |
DB/WB | DB | DB,_VB | DB |
Cool | Heat | Cool | Heat |
62/57 | 50 | 90/72 | 80 |
Table t
Ductwork
Ductwork should be designed and sized according to the methods in Manual Q of the Air Conditioning Contractors of America (ACCA).
It is recommended that supply and return duct connec-
1ne supply and return air duct systems should be de- signed for the CFM and static requirements of the job.
They should not be sized to match the dimensions of the duct connections on the unit.
Supply duct flanges are shipped flat and must be bent
up before attaching the supply duct.
To connect the return duct to the unit, use a straight piece of duct 22" wide by 7" deep. Insert the duct into the return opening in the bottom of the unit. Flange the duct over the existing flanges around the opening inside unit. Make sure that all sides of the duct are flanged over to permit removal of cooling chassis if required. Use a flexible connection to attach remainder of return duct. The return duct should be sealed to the unit casing and terminate outside the space contai_ningthe furnace.
The return duct must allow for the unit drain pan connections and drain tube.
[ ACAUTION J
no not screw into the side of the drain pan.
AirFilter
All indoor return air must be filtered. A
access panel. Removing the panel permits access to the filter.
The filter should be cleaned at least three times during each of the heating and cooling seasons, or more fre- quently if unusual conditions are encountered. To clean the permanent filter, shake filter to remove excess dirt and/or use a vacuum cleaner. Wash filter in soap or detergent water and replace after filter is dry. It is not necessary to oil the permanent filter after washing.
If an installation is.made in which it is more desirable to mount the filter exterior to the unit, in the return duct work or elsewhere, the permanent filter can be used or re- placed with a disposable filter. If a disposable filter is used, use the information provided in Table 2 when sizing the disposable filter.
Minimum Required Surface Area for Disposable Filters
Model Number | Filter Area (minimum) | |
PWC183 - | 480 | square inches |
PWC24,3 | 480 | square inches |
Table 2
Thermostat
The room thermostat should be located on an inside wall where it will not be subject to drafts, sun exposure or heat from electrical fixtures or appliances. Follow the manufacturer's instructions enclosed with the thermostat
for general installation procedures. Color coded insulated wires (#18 AWG) should be used to connect the thermo- stat to the unit.
Electrical Connections
All wiring must be done In accordance with the National Electrical Code (NEC), ANSl/NFPA No. 70 (latest edition); Canadian Electrical Code CSA C22.2 Part I (latest edition); or local codes, where they prevail. Any alteration of internal wiring will void certification and warranty.
Units are factory wired for a 230 volt power supply. If power supply is 208 volts, it will be necessary to
change a wire connection on unit transformer from 240 volt terminal to 208 volt terminal as shown on the
wiring diagram.
