Carrier 38AH044-084 User Manual

Page 30

LEGEND

AWG

— American Wire Gage

— Control Relay

— Heating Device

IFC

— Indoor-Fan Contactor

IFR

— Indoor-Fan Relay

kcmil — Thousand Circular Mils
LLS

— Liquid Line Solenoid

NEC

— National Electrical Code

(U.S.A. Standard)

— Heating Relay (field-

supplied 24-v sealed coil,
10 va maximum rating)

— Reversing Valve

— Terminal Block

Factory Wiring
Field Wiring

*To control heating device and provide automatic indoor-

fan operation on heating.

†Jumper removed only when separate 24-v trans-

former power source is used to power the 33CSUCE-06
relay pack.

**Field-supplied.

Internal 33CSUCE-06 relay contacts are rated for 1 amp/24 vac.

NOTES:
1. Liquid line solenoid valve LLS-A1 is used for solenoid drop

on circuit A. Liquid line solenoid valve LLS-B1 is used for
solenoid drop for circuit B.

2. Solenoid drop is a safety feature which prevents refrigerant

migration to the compressor during the OFF cycle. It is rec-
ommended on all systems and required on systems where
piping exceeds 75 ft (22.9 m) in length.

3. The 33CSUCE-06 relay pack requires 10 va.
4. Factory wiring is in accordance with NEC; field modifications

or additions must be in compliance with all applicable codes.

5. Wiring for field power supply must be rated 75 C mini-

mum. Use copper, copper-clad aluminum, or aluminum con-
ductors. Maximum incoming wire size for each terminal block
is 500 kcmil.

6. Terminal blocks are for external field control connections. Con-

trol connections must be Class 1 wiring.

7. Field-supplied components (IFC, LLS-A1, and LLS-B1) must

have a maximum sealed coil rating of 30 va each (0.25 amp
at 120 vac and 0.13 amp at 230 vac). Thermostats must have
a minimum pilot duty rating as follows:

38AH

(Ea Stage)

AMPS

VAC

094

275

2.29

120

1.15

240

104

325

2.70

120

1.35

240

8. Replacement of factory wires must be with

type 105 C wire or its equivalent.

9. Field-supplied liquid line solenoid valves in-

stalled at the evaporator are required on all
units.

10. Units 38AH094 has 140 va and unit 38AH104

has 130 va of power available for field-
installed accessories.

11. To minimize voltage drop, the following wire

sizes are recommended:

LENGTH —

Ft (M)

INSULATED WIRE —

AWG

(35 C Minimum)

Up to 50
(15.2)

No. 18

50-75
(15.2-22.9)

No. 16

More Than 75
(22.9)

No. 14

Fig. 22 — Field Wiring, One 2-Stage Thermostat — Units 38AH094 and 104