JOHNSON CONTROLS
38
Form 150.63-NM9
Issue date: 5/20/2021
SECTION 4 – INSTALLATION
Single-point supply connection – terminal block, non-fused
disconnect switch, or circut breaker
Figure 9 - Single-Point Supply Connection – Terminal Block, Non-Fused Disconnect Switch, or Circuit Breaker
Electrical Notes and Legend located on page 51.
It is possible that multiple sources of
power can be supplying the unit power
panel. To prevent serious injury or death,
the technician should verify that NO
LETHAL VOLTAGES are present inside
the panel AFTER disconnecting power,
before working on equipment.
The unit evaporator heater uses 120 VAC.
Disconnecting 120 VAC power from the
unit, at or below freezing temperatures,
can result in damage to the evaporator
and unit as a result of the chilled liquid
freezing.
LD07719
Power PanelControl Panel
Terminal Block,
NF Disconnect SW
or Circuit Breaker
1L11L2 1L3
GRD
MICROPANEL
2
L
CTB2
13 14
CTB1
Field Provided Unit Power Supply
Field Provided 120- 1-60
Micropanel Power Supply if Control
Transformer not Supplied
Flow Switch
See electrical note 9
Power PanelControl PanelPower PanelControl Panel
Terminal Block,
NF Disconnect SW
or Circuit Breaker
1L11L2 1L31L11L2 1L3
GRDGRDGRD
MICROPANEL
2
L
CTB2
2
L
CTB2
13 1413 14
CTB1
Field Provided Unit Power Supply
Field Provided 120- 1-60
Micropanel Power Supply if Control
Transformer not Supplied
Flow Switch
See electrical note 9
Figure 10 - Discharge Air Sensor Field Wiring
9
8
7
6
5
4
3
2
1
7
4
1
J6 PIN
IDENTIFICATION
ON I/O
DISCHARGE AIR
SENSOR WITH
MOUNTING BRACKET
FIELD SUPPLIED WIRING
QUABBIN 930421-2
OR EQUIVALENT
LD13345a
BLK (SIGNAL)
RED (+5 VDC)
DRAIN (GND)
BLK (SIGNAL)
RED (+5 VDC)
DRAIN (GND)
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