Outdoor Unit Wiring Connections; Outdoor Unit Slab Or Frame Installation; Outdoor Unit Terminal - Johnson Controls DHPM09NWM42Q1 Installation Manual

898150-UIM-B-0113
SECURING OUTDOOR UNIT TO SLAB OR FRAME
If the outdoor unit is installed on a field-provided slab or frame, use lag
bolts or equivalent to secure the outdoor unit to the slab or frame.
FOUR FIELD PROVIDED ANCHOR BOLTS
FIGURE 30: Outdoor Unit Slab or Frame Installation
SECTION XVI: OUTDOOR UNIT WIRING
CONNECTIONS
In the United States, wiring must conform with current local codes
and the current National Electric Code (NEC). In Canada, wiring
must conform with current local codes and the current Canadian
Electrical Code (CEC).
The main system circuit breaker or disconnect should be sized per
unit requirements and should be installed adjacent to outdoor unit.
Mis-wiring could damage unit or cause communication errors
between indoor and outdoor unit.
18 KBTU OUTDOOR UNIT
(TWO ZONE MAXIMUM)
To unit A
N(1) 2 3
L1 L2
power
cable
TO INDOOR
MAIN
UNIT
FIGURE 31: 18K Outdoor Unit Terminal
14
To unit B
N(1) 2 3
connecting
connecting
cable cable cable cable
TO INDOOR
To the power supply
UNIT
• Refer to unit nameplate for minimum circuit ampacity and maxi-
mum overcurrent protection size
• Local codes may require a disconnect between the indoor and out-
door units
• The main system circuit breaker and outdoor unit disconnect
switch should be sized per local codes and unit requirements
• Stranded wire must be used to connect the outdoor unit to the
indoor unit. The stranded wire is necessary to ensure proper sys-
tem communication and operation.
• Make sure you use an approved circuit breaker or switch
Model
18K & 24k
30K
42K
1. Remove outdoor unit access panel.
2. Route all wiring to outdoor unit through the wire routing plate.
3. Connect the control wiring and power supply wiring to the outdoor
unit wiring terminals according to the figures shown in this section.
4. The power cable should be put in from the hole under connection
cable cover.
a. If connecting with two indoor units, the connection cable should
be put in from hole A and hole B.
b. If connecting with three indoor units, the connection cable
should be put in from hole A , B and C.
c. If connecting with four indoor units, the connection cable should
be put in from hole A, B , C and D.
All power cables and connection cables must be protected with con-
duits.
5. The unit must be grounded according to local codes.
6. Fasten the power supply cord and control wiring with cord clamp.
7. Secure wiring using built-in wire strain relief.
8. Install the outdoor unit access panel back.
MAIN
OUTDOOR UNIT
POWER
A
L1 L2 1 2
L2
L1
N(1)
INDOOR UNIT
TERMINAL LEGEND
N(1) = L1
2 = Communication line
3 = L2
= Ground
IMPORTANT
Check indoor to outdoor field wiring: (N)1 from indoor unit must
go to (N)1 of outdoor unit; terminal 2 from indoor unit must go to
terminal 2 of outdoor unit; and terminal 3 of indoor unit must go to
terminal 3 of outdoor unit.
NOTICE
Fuse or Circuit Breaker Capacity
25A
30A
40A
OUTDOOR UNIT
B
3 N(1) 2
N(1)
2 3 2
A B
INDOOR UNIT
Johnson Controls Unitary Products
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