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The 569J***A/B is a single-circuit, two-stage cooling unit. Se-
lect a two-stage cooling thermostat, with or without supple-
mental heating as needed.
The 569J***T/U is a dual-circuit, three-stage cooling unit. Se-
lect a three-stage cooling thermostat, with or without supple-
mental heating as needed.
Select a thermostat cable or equivalent single leads of different
colors with minimum of five leads for 569J***A/B or six leads
for 569J***T/U unit. Check the thermostat installation instruc-
tions for additional features which might require additional
conductors in the cable.
For wire runs up to 50 ft (15 m), use no. 18 AWG (American
Wire Gauge) insulated wire (35°C minimum). For 50 to 75 ft
(15 to 23 m), use no. 16 AWG insulated wire (35°C minimum).
For over 75 ft (23 m), use no. 14 AWG insulated wire (35°C
minimum). All wire sizes larger than no. 18 AWG cannot be
directly connected to the thermostat and will require a junction
box and splice at the thermostat.
CONTROL CIRCUIT WIRING
Control voltage is 24 v. See Fig. 14 and the unit's label diagram
for field-supplied wiring details. Route control wires through
the opening in unit's end panel to the connection in the unit's
control box.
CONTROL TRANSFORMER WIRING
On multi voltage units, check the transformer primary wiring
connections. See Fig. 20 or refer to the unit's label diagram.
If the unit will be operating at 208-3-60 power, remove the
black wire (BLK) from the transformer primary connection la-
beled "230" and move it to the connection labeled "208". See
Fig. 20.
Fig. 20 — Control Transformer Wiring
EXTERNAL DEVICES
The 569J control transformers provide 24-v NEC Class 2 pow-
er sources to energize external control devices. These devices
will include the indoor fan motor contactor (or control relay).
These devices may also include liquid line solenoid valve (two
on 569J***T/U model), economizer control relay, supplemen-
tal electric heater contactors or control relays and other devices
selected by system designer.
Control transformer TRAN1 provides control power through
terminal R to C on the field connection terminal strip TB for
supply fan motor interlock. This source may also be used to en-
ergize economizer control relay and electric heater contactors
or relays. Maximum available power is 20 va. Check concur-
rent loadings by external control devices. If the maximum con-
current loading exceeds 20 va, purchase and install the acces-
sory Transformer-Relay package (available for 208/230 and
460-v units).
569J***T/U Only
Control transformer TRAN3 provides control power through
terminals A1 (9) and A2 (10) to C for liquid line solenoids.
Maximum available power is 75 va. These outputs are
switched ON/OFF by the Solenoid Valve Relays.
18
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