Carrier 38AH044-134 - Manual (Page 28)

NOTES:
1 Liquid line soienoid vaive LLS-A is used for solenoid
drop on circuit A. Liquid line solenoid valve LLS-B is
used for solenoid drop for circuit B.
2 Solenoid drop is a safety feature which prevents refrig­
erant migration to the compressor during the OFF cycle.
It is recommended on all systems and required on sys­
tems where piping exceeds 75 ft (22 9 m) in length.
3 The TSR-01 relay pack requires 10 va.
4
Factory wiring is in accordance with NEC; field modi­
fications or additions must be in compliance with all ap­
plicable codes.
5 Wiring for field power supply must be rated 75 0 mini­
mum. Use copper, copper-clad aluminum, or alumi­
num conductors. Maximum incoming wire size for each
ferminal block is 500 kcmil.
6 Terminal blocks TB3 and TB4 are for external field con­
trol connections Control connections are to be class 1
wiring
10
Field-supplied components (IFC, LLS-A, and LLS-B) must
have a maximum sealed coil rating of 30 va each (0.25
amp at 120 vac and 0 13 amp at 230 vac) Thermo­
stats must have a minimum pilot duty rating of 300 va
(2 5 amps at 120 vac and 1 3 amps at 230 vac)
Replacement of factory wires must be with type 105 C
wire or its equivalent
Field-supplied liquid line solenoid valves installed at the
evaporator are required on all units
Units have 175 va of power available for field-installed
accessories
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
LEGEND
AWG — American Wire Gage
C — Compressor Contactor
CR — Control Relay
HD — Heating Device
IFC — Indoor-Fan Contactor
IFR — Indoor-Fan Relay
kcmil — Thousand Circular Mils
LLS — Liquid Line Solenoid
NEC — National Electrical Code
(US.A Standard)
R — Heating Relay (field-
supplied 24-v sealed coil,
10 va maximum rating)
RV — Reversing Valve
SDR — Solenoid Drop Relay
TB — Terminal Block
TR — Timer Relay
Factory Wiring
________Field Wiring
Fig. 20 — Field Wiring, One 2-Stage Thermostat — 38AH044-084 Duai-Circuit Units
28