120 Vac Power Supply Connection; System Configuration - Dometic Blizzard NXT H540315 Installation Instructions Manual

Roof top unit used with 3105007.xxx or 3105935.xxx return air grille, electronic control kit, thermostat, optional indoor temperature sensor, air conditioner, ccc 2/lcd sz controls
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INSTALLATION INSTRUCTIONS
5. Plug the indoor temperature sensor cable (if ap-
plicable) into the P4 (white) 2 pin matching con-
nector in the electronic control box.
6. Connect the previously run Energy Manage-
ment System wires (if applicable) to the yellow
wires in the 6 wire harness. The polarity of these
connections does not matter.
7. If an Automatic Generator Start (AGS) kit is in-
stalled, follow installation instructions furnished
with AGS kit.
K.

120 Vac Power Supply Connection

 ELECTRICAL SHOCK HAZARD.
Make sure 120 Vac power is disconnected from
RV. Failure to obey this warning could result in
death or serious injury.
 ELECTRICAL SHOCK HAZARD.
Provide grounding in compliance with all appli-
cable electrical codes. Failure to obey this warn-
ing could result in death or serious injury.
1.  R oute the previously run 120 Vac power supply
wire through the strain relief and into the junc-
tion box. Tighten strain relief making sure not to
damage wires. Leave enough wire inside junc-
tion box to connect to unit 120 Vac wires.
2. Connect white to white; black to black; and green
to green or bare copper wire using appropriate
size connectors.
3. Tape the connectors to the supply wire to ensure
they don't vibrate loose.
4. Push the wires into the electronic control box.
L.

System Configuration

Now that the system is installed, it is necessary to do a
system configuration.
1. Electronic Control Configuration
Depending on the equipment options installed
by the RV manufacturer, the appropriate dip
switches will need to be switched to the "ON"
position. Placing the switch in the "ON" position
selects that option. See (FIG. 22) & (FIG. 23) &
(FIG. 24).
 D ip switches are in the "OFF position
when shipped from the factory except heat
pump models. On these models the ap-
propriate dip switch is in the "ON" position
from the factory. They are visible through
the opening in the electronic control box.
See (FIG. 23).
FIG. 22
Dip
Switches
FIG. 23
a. Ext. Stage - Ext. Stage is not used on this
unit. Leave in the "OFF" position.
b. Zone selection - Each CCC 2 thermostat can
have up to 4 zones. When only one unit is in-
stalled it becomes Zone 1 and no dip switch
setting is required. Each additional unit must
be assigned a zone (2 through 4). Each unit
must have a different zone setting.
c. Stage selection - Stage is not used on this
unit. Leave in the "OFF" position.
d. Heat Strip - Heat strip is not used in these
models. Leave in the "OFF" position.
e. Heat Pump - On heat pump models the #7
dip switch is in the "ON" position from the
factory. Non heat pump models leave in the
"OFF" position.
f. Furnace - If a Furnace/Aqua heat system
has been connected to this unit, the furnace
dip switch must be placed in the "ON" posi-
tion.
g. Dehumidify - Dehumidify is not used on this
unit. Leave in the "OFF" position.
13
Electronic Control Box
Dip Switches
Ext. Stage
Zone 2
Zone 3
Zone 4
Stage
Heat Strip
Heat Pump
Furnace
Dehumidify
Gen Start

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