Newco gxdf-8d 操作指南

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Equipped with a 6.5-gallon hot water tank, the brewer is powered by a 5500 watt, 240-volt element on single-phase units 
and three 3500 watt, 240-volt elements on three phase units. A single control board controls water temperature, brew 
volume, Visa-Brew, Auto-Arm, and the inlet water valve. Designed to brew simultaneously two separate brews of one, 
two or three gallons of hot coffee, the dual brewer also incorporates a hot water faucet. 
 
Timer Controls:  
 
Two independent volume controls for adjusting water volume for the left and right brewing centers.  The calibration 
system has been streamlined for the service tech with the incorporation of the Auto-Cal feature. To calibrate set the 
volume selector switch to the “I” position, turn the brew volume knob clockwise to the maximum setting, which is six (6) 
minutes, and initiate brew cycle. Brewer will then deliver water into the coffee or measuring container. Once the correct 
volume is reached simply turn the brew volume switch counter-clockwise until the brew stops.  The brew volume will now 
be calibrated for 1 and 2 volume settings. 
 
Auto-Arm:   
 
The Auto-Arm feature is designed to protect the customer from premature brewing when the water temperature is below 
the pre-set optimum brewing temperature setting. When a brew cycle is initiated, before the brew cycle begins Auto-Arm 
looks to see if the tank heater is on.  If the heater is on Auto-Arm will store the brew cycle signal and begin flashing the 
heating and Visa-Brew lights on the front control panel. Once the heater turns off, the brew cycle will automatically begin. 
This feature eliminates the need for the customer to check the tank temperature before brewing.  When brewing occurs 
on both sides, if a brew cycle is initiated while the other side is brewing, Auto-Arm will be disabled, eliminating any 
brewing delays. 
 
Visa-Brew:   
 
This feature uses a status brewing light on the left and right brew control center to alert the user that a brew cycle has 
either been initiated or is in process and to use caution. This feature also has a calibration adjustment on the control 
board, which allows for the calibration to continue the light flashing until the coffee completely drains from the brew 
basket.  Note:  A new brew cycle will not be accepted until the Visa-Light stops flashing. This design eliminates double 
brewing.  Auto-Cal is incorporated in this system. 
 
Temperature Calibration & Tank System:   
 
The system uses a solid state temperature control to maintain the water temperature in the tank with accuracy inside of 

±

 3

°

F. Included in the system is a water detection probe that prevents premature heater turn on when there is no water 

present in the tank. Until water makes contact with the probe, the tank heater will not energize. Additionally, a back-up 
manual reset limit control has been incorporated into the system, as well as heater run time protection. These features 
are designed to protect the equipment in the event of an operator or component failure. For ease of service, access to 
the tank is provided from the top of the unit and a top-mounted siphon-drain system is included. 
 
Service Alert System:   
 
The equipment is designed with maximum run time for the heating and water fill system. Listed below is a chart for 
interpreting an error code when the brewer will not operate. See brewer “face plate diagram” at rear of manual. 
   

Error Code: 

Problem Area: 

Cause: 

Check: 

Heating Lamp flashes 
continually  

Water Fill 

System detects that water valve has run 
for 6 min. w/o making contact with probe.   

Water supply to brewer, water filters & 
water probe to see if limed up. 

Left & Right Visa lights 
flash 

Tank Heater 

Tank heating system has run for 10 min. 
w/o a 3 degree change in temperature. 

Tank Heater, Main Thermostat & 
Limit Thermostat 

Right Visa light flashes 

Temperature Probe 

Thermistor is open 

Replace Thermistor 

Left Visa light flashes 

Temperature Probe 

Thermistor shorted 

Replace Thermistor