Bofa TCU User Manual

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TCU

USER MANUAL

VER 2.8 – 02/2020

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Summary of Contents for Bofa TCU

Page 1 USER MANUAL VER 2.8 – 02/2020...
Page 2: Table Of Contents
Table of Contents Safety ................................. 3 Warning Notices..........................3 Intended Use ............................ 4 Installation .............................. 5 Technical Data ..........................5 Services Required ..........................6 Transportation ..........................6 Power Supply Connection ........................ 7 Condensate Collection ........................8 Indicator Beacon ..........................8 Air Ducting Hose ..........................
Page 3: Safety
Safety Warning Notices To ensure the safe operation of equipment, all personnel must follow generally accepted safety procedures. These procedures ensure their own safety and the safety of those around them. In this manual and on the machine, safety symbols of the type described below are shown when a potential hazard is given, the advisory notices should be heeded at all times.
Page 4: Intended Use
The TCU uses a re-circulating air system. Air entering the TCU is passed via a fan through an air conditioning module where it is cooled and dehumidified before being ducted into a plenum containing air heaters.
Page 5: Installation
Installation Technical Data ITEM DESCRIPTION Ambient Temperature 15 - 35°C Ambient Humidity 30 - 70% @ 20°C Process Temperature +/- 8°C of ambient within a programmable range of 19° to Range 30°C Process Temperature +/- 1°C Control Air Delivery System Re-circulating Cooling capacity 2000W...
Page 6: Services Required
Services Required Bofa requires additional machine supply protection with the fitment of an external double pole circuit breaker conforming to national/federal regulations. Use the following table to ensure the recommended circuit breaker is used. Voltage Frequency Value of Supply Circuit Breaker...
Page 7: Power Supply Connection
Power Supply Connection 1. Check the integrity of the electrical power supply cable. 2. Test the mains input at the isolated supply is the correct voltage and frequency before proceeding. 3. Connect to the mains supply. Temperature sensor placement Install the temperature sensor as close to the operating area of the printer, without effecting the printing process.
Page 8: Condensate Collection
Condensate Collection Condensate is collected in the plastic container at the base of the machine and is accessed from the rear (FIG 1). FIG 1 Alternatively, condensate can be diverted directly to a drain via pipe work (not included) connected to the spout on the underside of the condensate tray (FIG 2 – Condensate Collector removed).
Page 9: Air Ducting Hose
Remove the indicator beacon from its protective packaging. Pass the beacon loom connector through the plenum base into the electrical compartment (FIG 3) and secure the beacon with the supplied fasteners (FIG 4). FIG 3 FIG 4 Connect the beacon loom to the Control PCB connector CN2. FIG 5 WARNING ELECTRICAL HAZARD.
Page 10 Connect Air Ducting Hoses to the TCU using the supplied hose clips. The upper port is the conditioned air outlet. The lower port is for air returning from the Printer. FIG 6 ------------------------------------------------------------------------------------------------------------------------------------------ Temperature Control Unit Issue 2.8 Feb 2020...
Page 11: Operation
Operation Initializing the Machine 1. On completion of the Printer/TCU installation turn the TCU Isolator to the ON position (FIG 7). The Green lamp should illuminate indicating that the TCU is energized and the Controller display will initially show as (FIG 8) with ‘tESt’...
Page 12 When an output temperature signal is available from the printer, the Controller shows the actual printer temperature (PV) in Red, with the target temperature (SV) displayed Green (FIG 10). The TCU will start and begin working to achieve the target temperature. FIG 10 The target or desired operating temperature (SV) of the printer can be adjusted to a value between 19°C and 30°C.
Page 13 FIG 13 A sticker on the machine, adjacent to the Controller, can be used as a guide for the procedure described (FIG 14). FIG 14 4. The Process Temperature (PV) within the Printer should move towards and stabilize within +/- 1°C of the Set Value Temperature (SV) in approximately 30 minutes (FIG15). PV = SV +/- 1°C <30 min PV ≠...
Page 14 If the Condensate Container is not replaced after emptying, or refitted with the plug still fitted, condensate will collect on the lower tray. Sensor probes at the front of the lower tray will detect the presence of condensate and cause the TCU to shutdown (FIG 18). ------------------------------------------------------------------------------------------------------------------------------------------ Temperature Control Unit Issue 2.8...
Page 15 (TCM Shut down) FIG 18 Remove the cap from the lower tray to allow condensate to drain from the tray and empty any condensate within the cap to clear the fault. The TCU will automatically commence operation (FIG 19). FIG 19...
Page 16: Disconnect And Shutdown Periods
0 – 9 minutes in 1 minute increments. The default setting is 1 minute. The Amber beacon will flash rapidly during the DISCONNECT period. If the Temperature Signal to the TCU is reinstated during the Disconnect period, the TCU will continue to run and not enter a SHUTDOWN period.
Page 17 FIG 21 ------------------------------------------------------------------------------------------------------------------------------------------ Temperature Control Unit Issue 2.8 Feb 2020 - 17 -...
Page 18: Preventative Maintenance
ELECTRICAL HAZARD. Ensure Isolator is in the OFF position before opening access door. The life span of the TCU Discharge Filter; will vary depending on the level of contamination of the ambient air. The filter can be deemed serviceable if the TCU can maintain the process temperature (PV) within +/- 1°C of Target temperature (SV) (FIG 22).
Page 19: Condenser Fan/Coil
(FIG 23). FIG 23 If it is thought likely the underside of the condenser coil may be obstructed, air applied as shown below may help improve TCU operating performance (FIG 24). FIG 24 ------------------------------------------------------------------------------------------------------------------------------------------ Temperature Control Unit Issue 2.8...
Page 20: Scheduled Maintenance
Scheduled Maintenance Scheduled Maintenance Task Frequency Date Comments Engineer Check/Replace TCU Filter Monthly Check/Clean Condenser Fan intake is clear Monthly Check Condensate Collector for leaks and Monthly level sensors are in place Check Condensate drainage path is clear Monthly Inspect Flexible ducting Connections...
Page 21: Spare Parts List
Spare Parts List ITEM PART NUMBER A1030305 Air Filter ------------------------------------------------------------------------------------------------------------------------------------------ Temperature Control Unit Issue 2.8 Feb 2020 - 21 -...
Page 22: Beacon/Pcb Interpretation And Fault Analysis
Beacon/PCB Interpretation and Fault Analysis Beacon and PCB Interpretation 1. TCU OK and Printer (PV) within +/- 1°C of Target Temperature (SV) CN10 CN11 2. TCU OK but Printer (PV) > 1°C from Target Temperature (SV) CN10 CN11 ------------------------------------------------------------------------------------------------------------------------------------------ Temperature Control Unit Issue 2.8...
Page 23 3. Condensate Container Full and Requires Emptying CN10 CN11 4. Condensate Container Overflow (Automatic Shutdown) CN10 CN11 ------------------------------------------------------------------------------------------------------------------------------------------ Temperature Control Unit Issue 2.8 Feb 2020 - 23 -...
Page 24 5. Condensate Present on Lower Collection Tray (Automatic Shutdown) CN10 CN11 6. Heater Enclosure Over Temperature (Automatic Shutdown) CN10 CN11 ------------------------------------------------------------------------------------------------------------------------------------------ Temperature Control Unit Issue 2.8 Feb 2020 - 24 -...
Page 25 7. Air Conditioning Unit Circuit Breaker Open (Automatic Shutdown) CN10 CN11 8. Heater Circuit Breaker Open (Automatic Shutdown) CN10 CN11 ------------------------------------------------------------------------------------------------------------------------------------------ Temperature Control Unit Issue 2.8 Feb 2020 - 25 -...
Page 26: Display And Condensate Error Checklist
No beacon and/or Controller display (see electrical faults section). TCU fails to move PV towards SV. Possible fault with ACU, Heater, or Control Module. ESCALATE Check supply voltage has not dropped below 207V Possible anomaly of the Controllers EPROM memory.
Page 27: Electrical Faults
Electrical Faults Error Remedy Red Beacon (No Blue) Check ACU circuit breaker is closed. (TCU Shutdown) Check heater circuit breaker is closed Heater Enclosure Thermal Trip may have operated due to an over temperature condition. Investigate cause of failure. ESCALATE No display on Beacon or Controller Check Control Module circuit breaker is closed.