Filter
Top Products
LEGEND AND NOTES FOR FIG. 58 AND 59
LEGEND
AHA -- Adjustable, Heat Anticipator SN -- Sensor
BKR W/AT -- Breaks with Amp Turns TB -- Terminal Block
C -- Contactor, Compressor TC -- Thermostat Cooling
CAP -- Capacitor TH -- Thermostat Heating
CB -- Circuit Breaker TRAN -- Transformer
CC -- Cooling Compensator
CLO -- Compressor Lockout _ Terminal (Marked)
COMP -- Compressor Motor O Terminal (Unmarked)
DM -- Damper Motor
DU -- Dummy Terminal _ Terminal Block
EQUIP -- Equipment
FPT -- Freeze Protection Thermostat • Splice
FU -- Fuse Factory Wiring
GND -- Ground
HPS -- High-Pressure Switch _ m-- Field Control Wiring
IAQ -- Indoor Air Quality Sensor Accessory or Optional Wiring
IDM -- Induced-Draft Motor
IFM -- Indoor-Fan Motor ......m_ To indicate common potential only;
not to represent wiring.
IGC -- Integrated Gas Unit Controller
L -- Light _ Economizer Motor
LED -- Light Emitting Diode
LPS -- Low-Pressure Switch _ Remote POT Field Accessory
LS -- Limit Switch
MGV -- Main Gas Valve OAT Sensor
NEC -- National Electrical Code
OAT -- Outdoor Air Temperature Sensor _ Disch Air Sensor
OCCUP -- Occupancy Sensor RAT Accessory Sensor
OFC -- Outdoor-Fan Contactor
OFM -- Outdoor-Fan Motor Low Ambient Lockout Switch
PL -- Plug Assembly
PMR -- Phase Monitor Relay
QT -- Quadruple Terminal
RAT -- Return Air Temperature Sensor
RS -- Rollout Switch
NOTES:
1. Compressor and/or fan motor(s) thermally protected three phase motors protected against primary
single phasing conditions.
2. If any of the original wire furnished must be replaced, it must be replaced with Type 90 ° C or its
equivalent.
3. TRAN1 is wired for 230-v operation. If unit is 208 v, disconnect the black wires from the ORN TRAN
wire and reconnect to the RED TRAN wire. Apply wirenuts to wires.
4. CB1,2 Must Trip Amps are equal to or less than 156% FLA. IFCB 140%.
5. The CLO locks out the compressor to prevent short cycling on compressor overload and safety devices;
before replacing CLO check these devices.
6. Jumpers are omitted when unit is equipped with economizer.
7. Number(s) indicates the line location of used contacts. A bracket over (2) numbers signifies a single
pole, double throw contact. An underlined number signifies a normally closed contact. Plain (no line)
number signifies a normally open contact.
8. Remove jumper between RC and RH.
9. 620 Ohm, 1watt, 5% resistor should be removed only when using differential enthalpy or dry bulb.
10. If a separate field-supplied 24 v transformer is used for the IAQ sensor power supply, it cannot have the
secondary of the transformer grounded.
11. OAT sensor is shipped inside unit and must be relocated in the field for proper operation.
12. For field-installed remote minimum position POT. remove black wire jumper between P and P1 and set
control minimum position POT to the minimum position.
47