Crown Boiler BWC Series Service Supplement Manual
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Crown Boiler BWC Series Service Supplement Manual

Boilers equipped with type iii mcba
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D
E S I G N E D
BWC Series
Service Supplement for BWC Series
Boilers Equipped with Type III MCBA
IMPROPER SETTING OF PARAMETERS CAN CAUSE UNRELIABLE OR UNSAFE OPERATION,
RESULTING IN PROPERTY DAMAGE, PERSONAL INJURY, OR LOSS OF LIFE:
• CHANGING PARAMETERS SHOULD ONLY BE ATTEMPTED BY A PROFESSIONAL HEATING
SERVICE TECHNICIAN.
• DO NOT CHANGE ANY PARAMETERS NOT DESCRIBED IN THIS MANUAL WITHOUT FIRST
CONSULTING THE FACTORY.
• AFTER CHANGING ANY PARAMETERS, CAREFULLY CONFIRM PROPER BOILER OPERATION
BEFORE LEAVING THE INSTALLATION SITE.
• THIS MANUAL IS INTENDED AS A SUPPLEMENT, NOT A REPLACEMENT, FOR THE
INSTALLATION MANUAL SUPPLIED WITH THE BOILER. SEE THE INSTALLATION MANUAL FOR
IMPORTANT INFORMATION NOT SHOWN IN THIS MANUAL.
Tel: (215) 535-8900 • Fax: (215) 535-9736 • www.crownboiler.com
WARNING
Manufacturer of Hydronic Heating Products
D
E S I G N E D
P.O. Box 14818 3633 I. Street
Philadelphia, PA 19134
L
T O
L
T O
E A D
E A D

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  • Page 1 E S I G N E D E A D BWC Series Service Supplement for BWC Series Boilers Equipped with Type III MCBA WARNING IMPROPER SETTING OF PARAMETERS CAN CAUSE UNRELIABLE OR UNSAFE OPERATION, RESULTING IN PROPERTY DAMAGE, PERSONAL INJURY, OR LOSS OF LIFE: •...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Boiler Operating Parameters Overview Entering The Access Code Changing Parameters Field Adjustable Parameters Communication, Fan Speed and Error Modes GCI PC Interface System Requirements Connecting Hardware Installing Gascom Changing The MCBA Parameters With Gascom Using Gascom To Monitor The MCBA Reading the MCBA Error Log III.

  • Page 4: Entering The Access Code

    I Boiler Operating Parameters A. Overview All BWC Series boilers are equipped with a microprocessor-based Honeywell control module called a “ MCBA”. This control manages all boiler functions including flame supervision and modulation. A total of 46 field adjustable param- eters are stored in the memory of this control.

  • Page 5: Changing Parameters

    entered, the menu tree will be expanded to include the items shown inside the dashed lines in Figure 1.1. Access to parameters 5 - 42 will be possible by following the instructions in Section C. After 15 minutes have passed without any keys being pressed, access to the expanded menu will end and the access code will need to be reentered to regain access to parameters 5-42.
  • Page 6 4) Double-click on the desired parameter. A window will open with either a field or a pull down list of options will appear. Enter or select the desired value for the parameter. 5) Click OK. 6) Repeat Steps (3) - (5) to change any other desired parameters. FIGURE 1.1: EXPANDED MENU TREE USE MODE KEY TO TOGGLE BETWEEN MODES (Mode returns to Standby from other modes if no key is pressed for 20 min.)
  • Page 7 7) After all parameters have been changed, click on the “Parameters” menu at the top of the screen and then click on “Write to MCBA”. After a few seconds, the display on the boiler will blink. This indicates that the parameters are written to the control and are in effect.

  • Page 8: Field Adjustable Parameters

    2) Changing the boiler water reset curve - When an outdoor temperature sensor is connected to a BWC Series boiler, the MCBA will adjust the target boiler supply temperature based on outdoor temperature when the boiler is respond- ing to a call for central heat.
  • Page 9 Table 1.3: Parameter Descriptions DESCRIPTION PURPOSE Factory set to 134F. This value plus 46F equals the target supply water temperature when the T3set DHW boiler responds to a call from the indirect water heater thermostat. With 134F factory setting, target supply temperature is 180F when boiler is responding to a call for DHW. DHW system Factory set to "ON".

  • Page 10: Communication, Fan Speed And Error Modes

    E. Communication, Fan Speed and Error Modes In addition to providing access to all field adjustable parameters, entering the access code also provides access to three additional mode menus using the boiler keypad. These are shown in Figure 1.1: 1) Communication Mode - This mode does not currently have any function. 2) Fan Speed Mode - Allows the user to view the blower fan speed (firing rate is determined by fan speed).

  • Page 11: Gci Pc Interface

    II GCI PC Interface A. System Requirements The GCI Interface requires a PC computer running a Windows 98/NT/2000 or XP operating system. In addition, the PC must have an open serial port. B. Connecting Hardware 1) Connect the serial cable from the GCI to the computer. 2) Plug in the GCI 3) Open the lower front jacket panel.
  • Page 12 CONNECT GCI RIBBON CABLE TO X7 OR X8 RECEPTACLE (WHICHEVER IS OPEN) Figure 3.1: GCI Ribbon Cable Receptical on MCBA...

  • Page 13: Changing The Mcba Parameters With Gascom

    D. Changing The MCBA Parameters With Gascom See Part I of this manual for instructions on changing parameters to the MCBA, not just the ones which were modi- fied. E. Using Gascom To Monitor The MCBA From the Monitor Menu select “Monitor MCBA”. This will bring up a window which plots the following informa- tion: 1) Temperatures: Flow - Actual boiler supply temperature...

  • Page 14: Component Test Procedures

    III COMPONENT TEST PROCEDURES A. Flame Signal Check 1) The flame signal can be checked between terminal number 9 on the low voltage terminal strip and ground. A good signal reading should be 6 VDC or greater. 2) If the signal is lower than 6 VDC, check the continuity of the ground wire between the ignitor and the junction box. If the ground wire is suspect replace the ground wire.
  • Page 15 Sensor Resistance Values Minimum Value Nominal Value Maximum Value Temperature (°F) (Ohms) (Ohms) (Ohms) 82304 89767 97227 71959 78310 84663 62144 67449 72755 53074 57443 61814 46557 50262 53966 40650 43770 46890 35665 38312 40960 33669 36129 38590 31370 33622 35874 27543 29443...
  • Page 16 APPENDIX A. Factory Parameter Settings Factory setting DESCRIPTION BWC070 BWC090 BWC120 BWC150 BWC225EN BWC225EL T3set DHW 1 (On) DHW system 1 (On) CH system T1top CH Mode T1foot CH Mode T4 minimum T4 maximum T4 frost protection T4 correction Tblocking Booster time Tparallel shift 13/14*...
  • Page 17 Manufacturer of Hydronic Heating Products E S I G N E D E A D P.O. Box 14818 3633 I. Street Philadelphia, PA 19134 Tel: (215) 535-8900 • Fax: (215) 535-9736 • www.crownboiler.com A1-2 PN: 980XXX 6/07...

This manual is also suitable for:

Bwc070Bwc090Bwc120Bwc150Bwc225enBwc225el

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