Dometic 630025 Instructions d'exploitation Page 80

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80
6F.DC VOLT REQUIREMENTS
DC VOLTSDC VOLTS
DC VOLTSDC VOLTS
DC VOLTS
On models 391XX.XXX, a DC volt supply is supplied to the
thermostat location: Positive (+) DC volt wires to R terminal
on the thermostat; and negative (–) DC volt wires to the
black wire from the unit. Polarity is crucial for proper
operation.
The operating range is 10 to 16 volts DC.
7F.COMPONENTS
THERMOSTATTHERMOSTAT
THERMOSTATTHERMOSTAT
THERMOSTAT
A.A.
A.A.
A.
MODEL 39015.601 and 39025.501MODEL 39015.601 and 39025.501
MODEL 39015.601 and 39025.501MODEL 39015.601 and 39025.501
MODEL 39015.601 and 39025.501
Two thermostats were used on these models: a cooling
only thermostat and a heating and cooling thermostat. Both
are 24V AC controlled systems.
On the base of the
cooling only thermostacooling only thermosta
cooling only thermostacooling only thermosta
cooling only thermostat, the is a FAN
switch with two positions, AUTO and ON. This operates the
air conditioner only. A separate thermostat is needed for
the furnace.
Verify that the thermostat wiring is correct.
A three connector cable 19 to 22 AWG is to be used for low
voltage connections. Low voltage wires in the control
compartment are marked "R", "G" and "Y". Route low
voltage cable from thermostat to unit electrical box.
Connect "R" from thermostat to red wire in control compart-
ment. Connect "G" from thermostat to blue wire in control
box. Connect "Y" from thermostat to yellow wire in control
box. Use wire nuts to ensure good connections.
To check the thermostat, be sure the OFF switch is all the
way to the right side. Next, disconnect all three wires at the
terminals R, G and Y.
Next, using an ohmmeter, check for continuity between R
and G and/or Y in the following manner. With room tem-
perature above the set point temperature and FAN switch
in AUTO position, continuity should exist between R to Y
and R to G. With room temperature below the set point and
FAN switch AUTO position, no continuity should exist
between R to Y and R to G.
With FAN switch to ON position, continuity should exist
between R to G regardless of room temperature.
To check ACTIVE terminals, place one lead from ohm
meter to R terminal and the other lead to the ACTIVE
terminal.
SWITCHSWITCH
SWITCHSWITCH
SWITCH
COMBINATIONCOMBINATION
COMBINATIONCOMBINATION
COMBINATION
IF ROOM TEMP.IF ROOM TEMP.
IF ROOM TEMP.IF ROOM TEMP.
IF ROOM TEMP.
IS ABOVE/BELOWIS ABOVE/BELOW
IS ABOVE/BELOWIS ABOVE/BELOW
IS ABOVE/BELOW
SetpointSetpoint
SetpointSetpoint
Setpoint
TEMP.:TEMP.:
TEMP.:TEMP.:
TEMP.:
FANFAN
FANFAN
FAN
SWITCHSWITCH
SWITCHSWITCH
SWITCH
AUTOAUTO
AUTOAUTO
AUTO
ONON
ONON
ON
TERMINALS THATTERMINALS THAT
TERMINALS THATTERMINALS THAT
TERMINALS THAT
ARE "ON"ARE "ON"
ARE "ON"ARE "ON"
ARE "ON"
G YG Y
G YG Y
G Y
ABOVEABOVE
ABOVEABOVE
ABOVE
XX
XX
X
XX
XX
X
BELOWBELOW
BELOWBELOW
BELOW
ABOVEABOVE
ABOVEABOVE
ABOVE
XX
XX
X
XX
XX
X
BELOWBELOW
BELOWBELOW
BELOW
XX
XX
X
COOLING ONLY THERMOSTATCOOLING ONLY THERMOSTAT
COOLING ONLY THERMOSTATCOOLING ONLY THERMOSTAT
COOLING ONLY THERMOSTAT
(FRONT)(FRONT)
(FRONT)(FRONT)
(FRONT)
COOLING ONLY THERMOSTATCOOLING ONLY THERMOSTAT
COOLING ONLY THERMOSTATCOOLING ONLY THERMOSTAT
COOLING ONLY THERMOSTAT
(BACK)(BACK)
(BACK)(BACK)
(BACK)
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