York PCG6B42 Installation Manual page 7

SERVICE ACCESS
Access to all serviceable components is provided at the following loca-
tions:
• Coil guards
• Unit top panel
• Corner posts
• Blower access panel
• Control access panel
• Indoor coil access panel
• Compressor access panel
• Heat exchanger access panel
Refer to Figure 3 for location of these access locations and minimum
clearances in Table 4.
CAUTION
!
This system uses R-410A Refrigerant which operates at higher pres-
sures than some alternative refrigerants. Only R-410A Refrigerant
may be used in this system. Gauge sets, hoses, refrigerant contain-
ers and recovery systems must be designed to handle R-410A. If
unsure, the equipment manufacturer should be consulted. Failure to
use R-410A compatible servicing equipment may result in property
damage or injury.
WARNING
!
Wear safety glasses and gloves when handling refrigerants.
Failure to follow this warning can cause serious personal injury.
Refer to Figure 14 for the R-410A Quick Reference Guide.
THERMOSTAT
The room thermostat should be located on an inside wall approximately
60" above the floor where it is not subject to drafts, sun exposure or
heat from electrical fixtures or appliances. Sealant should be used
behind thermostat to prevent air infiltration. Manufacturer instructions
enclosed with the thermostat should be followed for general installation
procedures. Color coded insulated wires (minimum #18 AWG) should
be used to connect thermostat to unit. See Figure 6.
This unit contains a multistage cooling compressor. A two heat / two
cool (2H/2C) conventional thermostat must be used. If a single stage
thermostat is used, the high / low gas heat input staging can be con-
trolled by a built in staging function on the unit control board. Do not use
power stealing thermostats.
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. The correct voltage must be main-
tained at the compressor terminals during starting and running condi-
tions. The voltage tolerances can be referenced in Table 1.
Table 5: Electrical Data
Model
36065 208/230-3-60
36100 208/230-3-60
42065, 42100 208/230-3-60
48065, 48100, 48125 208/230-3-60
60065, 60100, 60125 208/230-3-60
NOTES:
1. Minimum Circuit Ampacity.
2. Maximum Over Current Protection per standard UL 1995.
3. Fuse or HACR circuit breaker size.
Johnson Controls Unitary Products
Compressor
Voltage
RLA LRA
11.6 73.0
11.6 73.0
14.2 88.0
14.0 83.1
16.2 110.0
The wiring entering the cabinet must be provided with mechanical 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, replacement
wire must be of the type shown on the wiring diagram.
Electrical service must be sized properly to carry the load. Each unit
must be wired with a separate branch circuit fed directly from the main
distribution panel and properly fused.
Refer to Figures 6 and 7 for typical field wiring and for the appropriate
unit wiring diagram of the control circuit and the power wiring informa-
tion.
FIGURE 6: Typical Field Control Wiring Diagram For Gas Heat - AC
Models
FIGURE 7: Typical Field Power Wiring Diagram
Outdoor Fan Indoor Fan
Motor Blower Motor
MCC FLA FLA
18.1 1.7
18.1 1.7
22.1 1.7
21.9 1.7
25.3 1.7
5285473-UIM-E-1217
Max Fuse
1
MCA
Breaker
(Amps)
(Amps)
3.8 20.0
5.4 21.6
5.4 24.9
5.4 24.6
7.0 29.0
2
/
3
Size
30
30
35
35
40
7