Bunn ITCB Series - Preventive Maintenance; Draining the Tank; PM Steps

Bunn-O-Matic Corporation
17
In order to maintain proper operation and long service life BUNN recommends performing the preventative main-
tenanceevery6months.Individualcustomerswillvarywithsomecustomerschoosingnottoreceivepreventative
maintenance.
Tools Required:
Flat blade screwdriver•
Channel lock pliers•
Needle nose pliers•
Delimingtool(BUNNP/N:38227.0000)•
Priortoservicingthebrewer:
Disconnect the electrical supply•
Shut off the water supply•
Remove the top panel•
Drain the tank (see below)•
Draining the Tank
Step 1:Useaatbladescrewdrivertoremovethe7or10screwssecuringtherearpanelontothechassis,remove
the panel.
Step 2: Locatethehoseclamponthelltube,andclampoffthewaterline.
Step 3:Removetheclipsecuringthebottomendofthelllinetothecheckvalveandremovethelinefromthe
check valve.
Step 4:Placethewaterlineoverasinkorbucketandremovethehoseclamptoallowthetanktodrain.
PM Steps
Step 1: Disassemble and clean the strainer assembly:
UseChannellockplierstoremovethe¼”areto¾”hosethreadadapterttingfromthewaterinletassembly □
Use needle nose pliers to gently pull the strainer straight out. □
Rinse the mesh screen to remove any debris build-up. □
Reassembly is the opposite of disassembly. □
Step 2: Remove and clean the temperature sensor:
Gently pull the temperature sensor from the grommet in the top of the tank. □
Wipe any mineral build-up from the probe. □
Reinstallation is the opposite of removal. □
Step 3:Removeandcleanthellprobe:
Gentlypullthellprobeoutofthegrommet. □
Wipe any mineral deposits off of the probe. □
Reinstallation is the opposite of removal. □
Step 4: Remove and clean the sprayhead:
Using the pointed end of the deliming tool, remove any mineral build-up from the sprayhead outlet holes. □
Cleansprayheadtting □
Step 5: Rebuild the dispense solenoid:
Remove the hose clamps that secure the tubing to the valve. □
Remove the two nuts that hold the solenoid bracket to the machine. □
Gently remove the tubing from the valve body. □
Usingaatbladescrewdriver,removethefourscrewsandseparatethevalve  □
assembly.
Replaceplunger,spring,andrubberseatusingtherebuildkitBUNNP/N:  □
11517.0008.
Clean any mineral build-up from the valve. □
Reassembly is the opposite of disassembly. □