Wiring Requirements - Dometic Blizzard NXT H541815A Installation Instructions Manual

INSTALLATION INSTRUCTIONS
FIG. 7
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Supply
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D.

Wiring Requirements

1.  R oute a copper, with ground, 120 Vac supply
wire from the time delay fuse or circuit breaker
box to the roof opening. Use a listed/certified
non metallic - sheathed single strand cable. See
"A. Table - Unit Data" on page (4).
a. This supply wire must be located in the front
portion of the roof opening.
b. The power MUST be on an appropriately
sized separate time delay fuse or circuit
breaker. See "A. Table - Unit Data" on page
(4).
c. Make sure that at least 15" of supply wire
extends into the roof opening. This ensures
an easy connection at the junction box.
d. Protect the wire where it passes into the
opening with approved method.
2. Route a dedicated 12 Vdc supply wire (18-22)
AWG) from the RV converter (filtered side) or
battery to the roof opening.
 W hen a Comfort Control Center 2 (here-
inafter referred to as CCC 2) thermostat
is being installed with more than 2 zones,
route a dedicated 12 Vdc supply wire
(18-22 AWG) to zone 1 and zone 3 roof
opening.
a. This supply wire must be located in the front
portion of the roof opening.
b. Make sure that at least 15" of supply wire
extends into the roof opening.
3. Thermostat Communication Cable
a. CCC 2 Thermostat
I. Route a 4 conductor communication ca-
ble from the roof opening to the thermo-
stat mounting location using the shortest
most direct route. Make sure that at least
15" of the wire extends into the roof open-
ing and 6" extends from the wall at the
thermostat mounting location. See "E.
Choosing Thermostat Location" on page
(9).
b. LCD SZ Thermostat
I. Route a 3 conductor communication ca-
ble, 18 to 22 AWG, from the roof open-
ing to the Liquid Crystal Display Single
Zone (hereinafter referred to a LCD SZ)
thermostat mounting location. Make sure
that at least 15" of the wire extends into
the roof opening and 6" extends from the
wall at the thermostat mounting location.
See "E. Choosing Thermostat Location"
on page (9).
4. (CCC 2 system only) Optional Indoor Tempera-
ture Sensor
8
Supply
 W hen more than one unit is being
installed (additional zones) with the
CCC 2 thermostat, an additional
4 conductor communication cable
MUST be routed to each additional
unit roof opening. Make sure that
at least 15" of the wire extends into
the roof opening. See (FIG. 35).
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