SAMUEL JACKSON HU-SOUTHWEST-1480, Руководство по обслуживанию

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PAGE 45 of 84 HU-SOUTHWEST-1480 GAS-FIRED HUMIDAIRE UNIT
© SAMUEL JACKSON, INCORPORATED 2005 ALL RIGHTS RESERVED
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PID SETUP: The control action of the air and water valves is determined by the
“tuning” values called the PID. The PID values are labeled as GAIN, RESET
and RATE for both air and water on the PID SETUP screen. The default values
work for most installations. Consult the factory before adjusting these values.
Factory default values for the PID are:
Air – Gain 12.00
Air - Reset (m) 0.50
Air - Rate (s) 9.00
Water – Gain 8.00
Water – Reset (m) 0.65
Water – Rate (s) 45.00
•
PV OPEN TO LIGHT ONLY: The action of the gas Pilot Valve (PV) after
flame is established and the brief self-check period is over is set here. In most
cases, it is desirable to shut PV off after flame is established to preserve turn-
down when little heat is desired regardless of the manual low fire valve setting.
To activate, select “PV OPEN TO LIGHT ONLY”. MIN GAS is the minimum
position for the Gas Valve Motor (GVM) and this position is adjustable by
pressing the MIN GAS button. Pressing the “PV OPEN TO LIGHT ONLY”
toggles to the second choice “PV ALWAYS OPEN” which keeps the PV open
all the time during flame operation.
•
H20 SOFT START: This feature allows control of how far the water
temperature valve (WBV) will open (this is the SOFT POST) until the water
temperature reaches a certain temperature (SOFT TEMP) during the warm up of
the water temperature in the water tank. Once the SOFT TEMP water
temperature is reached, PID control action takes over. This feature is called
“soft start” since the warm-up of the water temperature, and hence the moisture
output of the unit, will be more gradual than with this feature off. Both SOFT
POST and SOFT TEMP are adjustable by pressing these buttons. “H2O
NORMAL START” is the second choice where PID control .
TEMP LIMITS & UNITS
The setpoint temperature ranges for air and water are set in this screen. Default values are
95
°
F [35
°
C] for the minimum and 155
°
F [68
°
C] for the maximum.
The allowed water temperature deviation from setpoint before the Turbo Nozzle is
activated or ERROR 115 TRU-TEMP (LOW WATER TEMPERTURE) occurs is also
set here at ALLOWED H20 TEMP DEVIATION. The default value is 5
°
F.
If the user wants the temperature units displayed in Celsius on the home page, then touch
the HOME PAGE TEMP UNIT IS button to toggle between Celsius and Fahrenheit.
PASSWORD
The default password is 1234. Touch the PASSWORD button to go to a screen that
allows you to change the default password. The password can be a 1 to 4 digit number.