Dometic AH-Passport I/O Compact, Инструкция по установке и эксплуатации

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19
EN
Passport I/O Digital Controls Operation
Parameter Name DX CW Factory Default Parameter Range
P-13
Reverse Automatic
Fan Speeds During
Heating
x x rEF
nor = Normal Fan Operation
rEF = Reversed Fan in HEAT Mode
Reverse the automatic fan speeds during HEAT mode to improve heat output in cooler
climates.
• When set to rEF, the fan speeds up when approaching the set point. The fan switches to
low speed at the set point and the water valve or compressor cycles off.
• When set to nor, the fan operates the same as during cooling, which represents normal fan
operation.
P-14
Cycle Fan With
Compressor
x x con
CYC = Cycle Fan with Compressor
con = Continuous Fan Operation
Select cycled or continuous fan operation.
• CYC: cycles the fan with the compressor.
• con: programs the fan to operate continuously whenever the system is on.
P-15
Reverse-Cycle or
Electric
x x nor
nor = Reverse-Cycle Heating
ELE = Electric Heater Installed
Units not equipped with reverse-cycle heat may have an optional electric heater added. Set
to ELE for the electric heat option.
• For software version A12 and older: Under the ELE setting, only the electric-heater relay
located toward the middle of the circuit board energizes during a heating cycle.
• For software version A13 and newer: Under the ELE setting, both the electric-heater relay
and the valve relay energize during a heating cycle. Since the valve-relay output only
supports a maximum of 15 A at 100–120 VAC or 10 A at 208–240 VAC (of resistive load,
when installing an optional electric heater that exceeds this load, it is necessary to install
an additional contactor that is rated to handle the full load of the electric heater.
P-16 Fan Motor Selection
x x SC
SC = Split Capacitor Fan Motor
SP = Shaded Pole Fan Motor
Set to SC for air-conditioner switch high-velocity blowers. Set to SP if your unit has a Shaded
Pole fan motor. See “Programming the Passport Control” on page 16 .
P-17
Reset Memorized
Defaults
x x nor
rST = Reset Defaults
nor = Normal
To reset all programming parameters, set this parameter to rST. This restores all
programmable parameters to the last saved default values.
P-18
Hydronic Water Valve
Forced Open
x nor
OPn = Valve Forced Open
nor = Normal Operation
Open the water valve to bleed air from the system.
• OPn: forces the valve open for four hours while the Passport control is turned OFF. If the
Passport control is turned ON or if AC power is interrupted during this four-hour period,
the valve override is canceled.
• nor: returns the valve to normal operation.
P-19
Water Temperature
Differential
x
15 °F (8 °C) 5 °F to 25 °F (3° C to 14 °C)
Set the temperature differential between the ambient air temperature and the hydronic water
temperature that controls the water valve. For example, selecting 10 °F (-12 °C ) opens the
valve when the water temperature is 10 °F (-12 °C ) less than the ambient temperature in the
cooling mode and 10 °F (-12 °C ) greater than the ambient temperature in the heating mode.
Careful selection of the temperature differential can fully utilize the ship’s heating and cooling
resources. For example, while in cooling mode and using a 10 °F (-12 °C ) value, the valve will
open to allow some cooling while the hydronic system is coming down to temperature.