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Legend and Notes for Fig. 20-24
LEGEND
NOTES:
1. Factory wiring is in accordance with UL 1995 standards. Field
modifications or additions must be in compliance with all appli-
cable codes.
2. All units or modules have single point primary power connec-
tion. Main power must be supplied from a field or factory-
supplied disconnect.
3. Wiring for main field supply must be rated 75 C. Use copper
conductors only.
a. Incoming wire size range for terminal block with MCA (mini-
mum circuit amps) up to 175 amps is 14 AWG (American
Wire Gage) to 2/0.
b. Incoming wire size range for terminal block with MCA from
175.1 amps to 420 amps is 2 AWG to 600 kcmil.
c. Incoming wire size range for non-fused disconnect with MCA
up to 100 amps is 14 AWG to 1/0.
d. Incoming wire size range for non-fused disconnect with MCA
from 100.1 amp to 200 amps is 6 AWG to 350 kcmil.
e. Incoming wire size range for non-fused disconnect with MCA
from 200.1 amp to 450 amps is 3/0 to 500 kcmil.
4. Terminals 1 and 2 of the LVT are for the alarm relay. The maxi-
mum load allowed for the alarm relay is 5-va sealed and 10-va
inrush at 24-v. Field power supply is not required.
5. Refer to certified dimensional drawings for exact locations of
the main power and control power entrance locations.
6. Terminals 24, 25, and 2 of the LVT are for the control of the
field-supplied LLSV. The maximum load allowed for the LLSV is
15-va sealed and 30-va inrush at 24-v. Field power supply is not
required.
7. LLSV (24-v) should be 15-va maximum per valve as required.
8. Not used on single circuit unit.
9. Installation of fan status switch (FS1) is recommended.
10. The contacts for remote ON/OFF, fan status, and demand limit
options must be rated for dry circuit application capable of han-
dling a 24-vac load up to 50 mA.
ALM R — Alarm Relay (24-v), 5-va Maximum
COM — Communication
COOL1 — Thermostat Stage 1 (24-v)
COOL2 — Thermostat Stage 2 (24-v)
EAT — Evaporator Air Temperature Sensor
EMM — Energy Management Module
EQUIP GND — Equipment Ground
FS1 — Fan Status Switch (24-v)
LLSV — Liquid Line Solenoid Valve
LVT — Low Voltage Terminal
NEC — National Electrical Code
SA — Set Point Adjustment (T-56, T-59)
SAT — Supply Air Temperature Sensor
SPT — Space Temperature Sensor (T-55, T-56, T-59)
Field Power Supply
Field Control Wiring
Fig. 24 — Optional Energy Management Module Wiring
LVT
TERMINAL
STRIP
a38-7129