Installation guide

3.StartunitinCoolingmodeandla'tanitrtmlmtilsystempressuresstabilize.
4. Measureoaldreanrd the following:
a, €_ltdoor ambieat-_ temperature (_'F db),
b. Evaporator inlet-_ temperature (_F wb).
e, Suction-tube temperature (_F) at low-side sarv'iec fit_g.
d. Suction (low-side) pressure (psig).
5. Using "Conling Charging Charts," onmpare outdeor-_ tempar_--,Jture(°F db) wlth the suction llaaepressure (psig) to deton'nlaae desirad system
opara_g sue'don line temperature (S_ Fit, 18-30).
6. Compare actual suction-tube temperature with desired suetlon-tubc temperature, Using a tolcro_oc of ± 3_F, add refrlgemnt if antw.1
temperature is more than 3_F higher tlw_ proper suction-tube temperaau'e, or remove refrigerant if antw.1 temperature is more than 3_F lower
tlwaa reqtfirad suction-tube temperature.
NOTE: If the problem causing the inaeonmte readings is a refrigerant leak, refbr to the CheckJbr Refrigerant Leal_ s_tion.
C. INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS
A CAUTION: For cooling operation, the recommended airflow is 350 to 450 elm for each 12,000 Btuh of rated cooling
capacity. For heating operation, the airflow must produce a temperature rise that falls within the range stamped on the unit
rating plate.
Table 7 shows the temperature rise at various airflow rates. Tables 1] and 13 show both heating and eonling airflows ut various external static
pressures. Refer to these tables to deton'nlaae the _flow for the Wstom being installed (See Tables 14 and 15 for ",vetcoil pressure drop),
NOTE: Be sure that all supply- and return-air grilles are open, free from obstructions, mad adjusted properly,
WARNING: Before changing blower speed, shut off gas supply. Then disconnect electrical power to the unit and install
lockout tag, Electrical shock or explosion can cause serious injury or death.
Airflow con be changed by changing the lead connections of the blower motor,
Unit PY]P two- or thr_-spccd motors. (except size 030) m'e factory wired for low _ced operation, Unit PY]P030 is fantox3, wired for medium
speed.
All PY2P traits are faetox3' w'h'ed for low _ced and may need to be wired for medium or high _ced in the field.
FOR 2081230V
For color and.ingon the 2081230V motor leads, see Table 9,
Table 9-Color Coding for 208f230-V Motor Leads
3-SPEED 2-SPEED
black = high speed black = high speed
blue = medium speed
red = low speed rod = low speed
To change the sp_d of the blower motor (BM), remove the fan motor speed leg leed from the blower relay (BR). This w'ire is attached to tt,mninal
BM of the integrated gas control (IGC) board for single- and 3-phase traits. To change the _ccd, remove and replace with lead for desired blower
motor sp_d. Insulate _he removed lead _oavoid contact wi_h chassL_ parts,
FOR 460-V GE MOTORS
For color anding on the 460-'¢ GE motor leads, see Table 10.
Table lf)-Color Coding for 460-V GE Motor Leads
3*SPEED 2-SPEED
black = high speed block = high speed
violet = jumper blue = jumper
orange = medium speed
red = low speed red = low speed
To clxange the speed of the blower motor (BM), remove fan motor sp_d lead from the blower relay (BR) and replane xv'iththe leed for the desired
blower motor speed, The motor _ced leed is attached to ton'nlaaal BM of the integrated gas eonb'ol (IGC) board. For low mad medium _ccds, black
must be connected to the jumper wire. [nsulaee removed lead end ¢o avoid contact wieh chassL_parts', To sclce't high speed on 460-v GE motors,
separate the black (female quiak connee't - QC - from the jumper lead (male quiak connee't - QC) mad connect the black lead to the BR. Insulate
_hejumper R_avoid contact with arty chassL_ parts,
D. COOLING SEQUENCE OF OPERATION
With the room thermostat SYSTEM swlteh in the COOL position mad the FAN swlteh in the AUTO, position, the eonling sequence of operation
is as follows:
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