Weil-McLain BCP-8S User Manual
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Weil-McLain BCP-8S User Manual

Weil-McLain BCP-8S User Manual

Steam sequencing boiler control and extension
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Stage A
Stage B
Stage C
Stage D
OUTPUT RATING: 2A, 120VAC.
MAXIMUM 15A TOTAL FOR ALL CIRCUITS
INPUT RATINGS: 120VAC 60Hz, 12VA MAX
CAUTION:
Risk of Electric Shock.
Use Copper Conductors Only.
PWR
Stage A
Stage B
Stage C
Stage D
L N
1 2
3
4
5
6
7
8
9
10
Stage E
SYS
Stage F
AUX OUT
Stage G
COMB. AIR
Stage H
C
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
PROGRAM
AUX
Stage E
Stage F
Stage G
Stage H
SYS
OUT
16
18
11
12
13
14
15
17
19
20
21
BCP-8S
BCP-8X
BCP-8S
STEAM SEQUENCING CONTROL
13
PSI
<AB>
DE
HI
LO
STAGE
US
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
RUN
SENSORS MUST BE GOLD SERIES
System
COMB.
Auxiliary
Outdoor
4-20mA
AIR
Input1
Temp
+
-
22
23 24
25
26
27
28
29
30
AND
35
F
GH
JK
-- OFF
MENU
RS485
SHUTDOWN
Auxiliary
Auxiliary
PROVE
/TSTAT
Input2
Input3
/SETBACK
31
32
33
34
35
36
37
38
Part Number 550-100-069/0408

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Summary of Contents for Weil-McLain BCP-8S

  • Page 1 INPUT RATINGS: 120VAC 60Hz, 12VA MAX CAUTION: Risk of Electric Shock. Use Copper Conductors Only. Stage A Stage B Stage C Stage D Stage E Stage F BCP-8S BCP-8X BCP-8S STEAM SEQUENCING CONTROL <AB> AUX OUT COMB. AIR STAGE ENCLOSED ENERGY...

  • Page 2: Table Of Contents

    PID Operation ....5 OSS Operation....5 Selecting the System Features .
  • Page 3 Stage H 4-20mA Input1 23 24 When connecting Pressure Sensors, Polarity is observed. However, when connecting Temperature Sensors, no Polarity is observed. Prove terminals must be connected for BCP-8S to operate stages. -- OFF MENU RS485 Outdoor Auxiliary Auxiliary SHUTDOWN...
  • Page 4 The BCP-8S’s control PID algorithm allows it to look at the rate of change in the system. If the system oscillation is minimal, the BCP- 8S will make slow and gradual output adjustments. If the load is changing quickly, the BCP-8S can be set to OSS sequencing where it will react based on load changes.
  • Page 5 When the BCP-8S PID logic foresees that the system will overshoot, regardless of the current system and target values, it will make sure from short cycling. setting, as a mean to calculate the number of stages the BCP-8S shall have on at any point. For every Throttle Range below the set point 55 Psi...

  • Page 6: Interface

    The program should consist of the following: The BCP-8S has been designed with Steam heating as the primary purpose. With this in mind, many of the BCP-8S features can be (389-900-226). The BCP-8S can receive an external Set Point as a 4 - 20mA signal from an EMS system using the 420MOD Interface.
  • Page 7 Each of the BCP-8S and BCP-8X consists of three primary enclosure components. enclosed with the Enclosure Wiring Cover for security. The wiring terminals are of the plug-in type to ease installation and removal. components mount on the base. The bottom section of the Enclosure Base contains the wiring chamber with knockouts on the bottom to ease installation.
  • Page 8 2 voltage. If the System Sensor cannot sense the correct system pressure being supplied to the building, the BCP-8S will not provide comfortable heat levels. Be sure that it is located on the main supply header before any takeoffs.
  • Page 9 located on the common header. Contact the factory for pressure sensor options. 2-conductor cable (Belden #8760 or equivalent). 25 (+) and connect the Black wire to terminal 26 (-). 8S will disable all boilers when the outdoor temperature is above the adjustable Outdoor Cutoff temperature. This feature will automatically be activated when an outdoor sensor is connected.
  • Page 10 PROVE jumper supplied unless replacing it with a Prove signal. The BCP-8S can control the Combustion Air Damper when the Comb. Air Output option is activated in the Startup Menu (See page 1 ). In this scenario, the PROVE input will be used to check on the Combustion Air Damper status.
  • Page 11 (389-900-226) using the provided 6-pin phone cable. to the second extension or the420MOD Interface (389-900-226). be to use the 420MOD Interface (389-900-226) to provide a 4-20mA set point signal to the BCP-8S. communication problem. Extension B requires the Switch to be set to "B" will operate stages "Q" through "X".

  • Page 12: Control Mode

    <Maintenance> <System Startup> BACK SELECT ---- MAINTENANCE ---- Unit Present Time12:30P <Sensor Trim> <Histories> <Configuration> BACK SELECT BCP-8S V1.00 Pressure 30psi EMS 4-20mA, Shtdown 0psi - 30psi BACK NEXT Sys=10 psi 10:00AM BACK NEXT --- SENSOR TRIM ---- Sys Trim +0.0 psi...

  • Page 13: Season

    -- EMS SET POINT -- 8.0 psi BACK SAVE ----- SET POINT ----- 8.0 psi BACK SAVE TGT=9.0 psi <EFG> ---- Boiler Menu ----- SETTINGS ------ Season Winter Set Point 9.0psi EMS Set Point 9.0psi <System Settings> <Maintenance> <System Startup> BACK SELECT - SYSTEM SETTINGS -...
  • Page 14 Can be accessed by holding down the Menu button for over three seconds. To be able to change the BCP-8S settings the Program/Run Switch must be set to Program. The switch is located under the Enclosure Wiring Cover for security. The Enclosure Wiring Cover can be securely closed using a padlock.

  • Page 15: Total Boilers

    35 and 36 to turn off all the relays including all boiler stages. 35 and 36 the capability of functioning as a heat-call. That is, when the terminals are shorted, the BCP-8S will sequence the stages to maintain the set point. However, when terminals are opened, all stages will turn off.
  • Page 16 Hold Button: MENU/<System Startup>/.../Sequencing Hi/Hi. Then, the BCP-8S will sequence the lower stages of all Automatic boilers before sequencing the higher stages. higher stage of the lag boiler. Hold Button: MENU/<System Startup>/.../Sequencing Boiler Min. Run Time. The PID relies on the rate of change in the system pressure.

  • Page 17: System Settings

    Can be accessed by holding down the Menu button for over three seconds. To be able to change the BCP-8S settings the Program/Run Switch must be set to Program. The switch is located under the Enclosure Wiring Cover for security. The Enclosure Wiring Cover can be securely closed using a padlock.

  • Page 18: Pid Operation

    To be able to change the BCP-8S settings the Program/Run Switch must be set to Program. The switch is located under the Enclosure Wiring Cover for security. The Enclosure Wiring Cover can be securely closed using a padlock. Hold Button: MENU/<System Settings>/<Stage Settings>...

  • Page 19: Last Stage Hold

    Hold Button: MENU/<System Settings>/<Stage Settings>/Last Stge Hold turned off. until the system reaches 10 Psi. During that period, the display will show "Hold Until 10 Psi" then, the lead stage will turn off Hold Button: MENU/<System Settings>/<Stage Settings>/Throttle will be turned on or off. Set Point.

  • Page 20: Lead Boiler

    BACK ------ SETBACK ------- BACK Setback to 5 Psi". The temperature limits set on the boilers must be higher than the BCP-8S Set Point. Read the section at left for details that will prevent erratic system operation. SELECT SELECT 24hrs...

  • Page 21: Wiring

    PM hours. Remember that the battery is used as a time backup. If no power is supplied to the BCP-8S, the battery will die in three months and time clock values will be lost. Thus, DO NOT power down the control during off-season.

  • Page 22: Display

    Hold Button: The BCP-8S display layout provides a variety of information that gives an immediate picture of the operation status. The display shows four heating boilers at a time. The two middle buttons scrolls the screen to view additional boilers. Moreover, all the information is brightly displayed.
  • Page 23 Button: BOILER/Mode The BCP-8S will control the unit’s operation to maintain the desired Set Point. Only units set to Auto can be lead unit. These units can only be activated when all units in Auto have been at HI for an adjustable Standby delay period.
  • Page 24 BACK CLEAR 0.25 0.05 0.025 0.002 0.12 0.06 0.006 0.01 0.32 0.16 0.015 BCP-8S STEAM SEQUENCING CONTROL <AB> -- OFF BOILER MENU DO NOT APPLY ANY VOLTAGE TO INPUT TERMINALS SENSORS MUST BE GOLD SERIES RS485 System Auxiliary Outdoor Auxiliary...
  • Page 25 Check if the control has any of the following: Setback value. - The BCP-8S will only control boilers their mode is set to Auto or Standby. Check if any boilers have their Mode set to Manual, Off, or Standby. - Increase the Minimum Runtime only if all boilers tend to short-cycle.

  • Page 26: Season

    Startup and more advanced operation settings. The installer menu can be access by holding down the Menu button for three seconds or more. To be able to change the BCP-8S settings the Program/Run Switch must be set to Program. The switch is located under the Enclosure Wiring Cover for security. The Enclosure Wiring Cover can be securely closed using a padlock.
  • Page 27 º º º Button: MENU/Outdoor Cutoff BCP-8S will control and sequence the boiler stages to hold the set point. temperature and the burner stages will be active to hold the set point. Button: MENU/<System Settings>/<Setback Schedule>/Setback Button: MENU/<System Settings>/Setback load is required during the night or on the weekends when building is not occupied, but heat is still required.
  • Page 28 ....... . 20°F/-17°C to 100°F/38°C, ON and OFF 1 to 10 minutes 0 to 60 minutes 500 Blaine Street Michigan City, Indiana 46360 219-879-6561 http://www.weil-mclain.com Part Number 550-100-069/0408...

This manual is also suitable for:

Bcp-8x

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