Weil-McLain BCP-8S User manual

Weil-McLain
Brand
Weil-McLain
Model
BCP-8S
Category
Water heaters & boilers
Type
User manual

This manual is also suitable for

BCP-8W
HYDRONIC SEQUENCING CONTROL
SYSTEM
DHW PUMP
PWR
LN
12
SYSTEM
3
DHW
PUMP
5
Stage A
7
Stage B
9
Stage C
11 13
Stage E
15
Stage F
17
Stage D
6 8 10 12 14
16 18
RS485
SYS=144F OD=35F
<AB
>DEGHJK
HI LO -- OFF
4
Stage G
19
Stage H
21
OUTDOOR
TEMP
27 29 31
DHW
33
SHUTDOWN
/TSTAT
/SETBACK
35
RETURN
TEMP
20 22 28 30 32 34 36
STAGE MENU
Stage E
Stage F
Stage G
Stage H
Stage A
Stage B
Stage C
Stage D
25 26
37 38
PROVE
TEMP
PROGRAM RUN
23 24
COMB.
AIR
COMB. AIR
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
CUS
AUX 1
INPUT RATINGS: 120VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
CAUTION:
Risk of Electric Shock.
OUTPUT RATING: 2A, 120VAC.
MAXIMUM 15A TOTAL FOR ALL CIRCUITS
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
 ,167$//$7,21$1'23(5$7,21,16758&7,2160$18$/
 86(523(5$7,21,16758&7,2160$18$/
BCP-8W
AND
BCP-8X
+<'521,&6(48(1&,1*%2,/(5&21752/$1'(;7(16,21
7KLV:HLO0F/DLQFRQWUROLVVWULFWO\DQRSHUDWLQJFRQWUROLWVKRXOGQHYHUEHXVHGDVD
SULPDU\OLPLWRUVDIHW\FRQWURO$OOHTXLSPHQWPXVWKDYHLWVRZQFHUWLILHGOLPLWDQGVDIHW\
FRQWUROVUHTXLUHGE\ORFDOFRGHV7KHLQVWDOOHUPXVWYHULI\SURSHURSHUDWLRQDQGFRUUHFWDQ\
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:$51,1*
Part Number 550-100-071/0408
2
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81'(567$1',1*23(5$7,21&21&(37     5
Reset Ratio/Outdoor Reset ................5
PID Operation .......................6
OSS Operation ......................6
0DNH6XUH<RX+DYHWKH5LJKW&RQWURO          7
,1,7,$/6(783                     7
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,167$//$7,21                    
0RXQWLQJWKH(QFORVXUH                
,QVWDOOWKH6HQVRUV                    9
System Sensor Installation ................9
Outdoor Sensor Installation ................9
:LULQJ                          10
Wiring the Power (Terminals 1, 2) . ...........10
Wiring the Sensors ...................10
Wiring the Domestic Hot Water (DHW) Sensor (Terminals 33,
34)............................11
Wiring the Shutdown (Terminals 35, 36) ........11
Wiring the T-STAT (Terminals 35, 36) ..........11
Wiring the Setback (Terminals 35, 36) .........11
Connecting to the BCP-8X Panels and 420MOD Interface13
Selecting the BCP-8X Panel Letter ...........13
,167$//(50(186(48(1&(           14
6WDUWXS6HWWLQJV                      17
Program Change Settings. ...............17
Startup Sequence ....................17
Control Mode ......................17
Display Unit .......................17
Setting the 4mA and 20mA Set Points (Available in 4-20mA
EMS only) ........................17
DHW Piping .......................18
DHW Pump Output ...................18
Combustion Air Damper Output . ............18
External Input Mode . ..................18
Burner Type .......................19
Boiler Output ......................19
Total Boilers .......................19
Staging .........................19
Sequence ........................19
Control Logic ......................19
Sensor Fault. ......................20
6HWWLQJWKH&RQWUROWR)DFWRU\'HIDXOWV         20
2SHUDWLQJ6HWWLQJV                    20
Program Change Settings. ...............20
Season .........................21
Reset Ratio .......................21
Customized Reset Ratio. ................21
Set Point (Not Adjustable in EMS Mode) ........22
Outdoor Cutoff Temperature. ..............22
Target Offset. ......................22
Minimum Target .....................23
Maximum Target. ....................23
%RLOHU0LQLPXP5HWXUQ                  23
Minimum Return. ....................23
Return Lag. .......................24
6\VWHP6HWWLQJV                      24
Program Change Settings. ...............24
6WDJH6HWWLQJV                       24
Reaction Time . .....................24
Purge Delay .......................24
Minimum Runtime . ...................24
Standby Delay. .....................25
Last Stage Hold .....................25
Throttle Range. .....................25
/HDG6HWWLQJV                       25
Lead Boiler .......................26
Rotate Mode. ......................26
6HWEDFN6FKHGXOH                     26
Setback .........................26
Boost ..........................26
Boost Period. ......................27
Day/Night Schedules ..................27
Set Present Time ....................27
'+:6HWWLQJV                       2
DHW Priority Timer (Available with Parallel DHW Piping)28
DHW Set Point (Requires an Optional DHW Temperature
Sensor) .........................28
3XPS9DOYHDQG&RPEXVWLRQ$LU'DPSHU2SHUDWLRQ 29
Run-On .........................29
Pump Exercise .....................29
0DLQWHQDQFH                        30
System & Outdoor Sensor Trim .............30
+LVWRU\                           30
&RQ¿JXUDWLRQ ......................30
Display and Buttons . ..................30
%RLOHU6HWWLQJV                       32
Mode ..........................32
RunTime. ........................32
7528%/(6+227,1*                 33
08/7,3/(%2,/(56:,7+380363,3,1*:,5,1*
',$*5$06                      34
86(50(186(48(1&(               35
Program Change Settings. ...............35
Season .........................35
Set Point (Not Adjustable in EMS Mode) ........36
Reset Ratio .......................36
Customized Reset Ratio. ................36
Outdoor Cutoff Temperature. ..............37
Setback .........................37
Day/Night Schedules ..................37
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HYDRONIC SEQUENCING CONTROL
SYSTEM
DHW PUMP
PWR
LN
12
SYSTEM
3
DHW
PUMP
5
Stage A
7
Stage B
9
Stage C
11 13
Stage E
15
Stage F
17
Stage D
6 8 10 12 14
16 18
RS485
SYS=144F OD=35F
<AB
>DEGHJK
HI LO -- OFF
4
Stage G
19
Stage H
21
OUTDOOR
TEMP
27 29 31
DHW
33 35
RETURN
TEMP
20 22 28 30 32 34 36
STAGE MENU
Stage E
Stage F
Stage G
Stage H
Stage A
Stage B
Stage C
Stage D
25 26
PRESS
+ -
37 38
PROVE
TEMP
PROGRAM RUN
23 24
COMB.
AIR
COMB. AIR
Connect to Extension panels to
add additional stages or connect
to 420MOD Interface for
external set point.
When connecting Temperature Sensors, no
Polarity is observed. Prove terminals
must be connected for BCP-8 to
operate stages.
Button function is presented on
bottom row of the display.
LEDs indicate
associated relay’s status
Program Switch to restrict access
to function changes. This Switch is
covered with Enclosure Wiring Cover.
System Output controls pumps,
valves, or other system components.
DHW Pump and Comb. Air relays are
controlled when configured.
Output Relays to manage the stages.
BCP-8W
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
CUS
SHUTDOWN
/TSTAT
/SETBACK
INPUT RATINGS: 120VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
CAUTION: Risk of Electric Shock.
OUTPUT RATING: 2A, 120VAC.
MAXIMUM 15A TOTAL FOR ALL CIRCUITS
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
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4
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The BCP-8W is the perfect control whenever multiple boiler stages are required for Hydronic heating applications. The BCP-8W controls
the stages and their pumps or valves to maintain a precise system set point.
3,'2529(56,=('6<67(0266/2*,&
The BCP-8W’s control algorithm allows it to look at the rate of change in the system. If the load is changing quickly, the BCP-8W can
be set to OSS sequencing where it will react based on load changes. If the system oscillation is minimal as in heating applications, the
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oscillation around the set point.
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The BCP-8W’s alphanumeric digital display names each system parameter in simple English and shows its precise value. The easy to
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commands.
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Manual, First-On/First-Off (FOFO), or Time. The Time rotates the lead stage every selected period from every hour to every 41 days.
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With its Outdoor reset feature, the BCP-8W is capable of changing its temperature target based on the outdoor temperature. It offers
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or Setback using an External Signal. )XUWKHUPRUHDFXVWRPL]DEOHRXWGRRUUHVHWFXUYHKDVEHHQLQFRUSRUDWHGIRUXQLTXHDSSOLFDWLRQV
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work in standby mode will remove it from the rotation. In this mode, the boiler will be used for backup in large demand periods where
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These outputs work with the control logic to operate a primary system pump and a combustion air damper. In addition, a System Prove
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The BCP-8W can sequence boilers as needed)RUKHDWLQJV\VWHPVZKHUHKLJKHUHI¿FLHQF\LVDFKLHYHGXVLQJORZHU¿ULQJVWDJHVWKH
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other types of boilers, using the Normal Sequencing option brings the lower operating stage followed by the higher one of the lead boiler.
That will be repeated for each of the lag boilers.
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require that the operation of the higher stages turn off the lower operating stages. This can be achieved by selecting Single from the
Startup Staging menu.
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As a stand-alone, the BCP-8W-8 is designed to control eight stages. However, it has the capability of expanding its control to two
extension panels (BCP-8X) each with eight stages. Thus, the BCP-8W can control a total of up to 24 stages.
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Using a smart algorithm, the BCP-8W can monitor the boiler return temperature using an optional return sensor mounted on the return
line. Then, sequence the boilers to raise the return temperature above an adjustable Minimum Return.
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Having a DHW input either as a dry contact to be used with an external aquastat or as a temperature sensor that can be ordered separately,
the BCP-8W can control a DHW pump using its built-in DHW Pump output relay. The user will have different priority options that
varies based on the DHW piping design.
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The BCP-8W has multiple operating modes that satisfy most hydronic systems. When the
Outdoor Reset is selected, it can change the System Set Point based on outdoor temperature.
Or, it can be set to Set Point and sequence stages to achieve a manually adjusted Set Point.
In Outdoor Reset, the BCP-8W controls a hot water heating system to provide a building with
comfortable and even heat levels. The BCP-8W varies the Target temperature of the circulating
heating water in response to changes in the outdoor temperature.
The BCP-8W also controls the system circulating pump with an adjustable Outdoor Cutoff.
When the outdoor temperature is above the Outdoor Cutoff, the System Pump will be off
and no heating water is circulated through the system. When the outdoor temperature drops
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circulate through the system. The temperature of the heating water is controlled by the Reset
Ratio parameters or the Set Point.
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When a building is being heated, heat escapes through the walls, doors, and windows to
the colder outside air. The colder the outside temperature, the more heat escapes. If you
can input heat into the building at the same rate that it is lost out of the building, then the
building temperatures will remain constant. The Reset Ratio is an adjustment that lets
you achieve this equilibrium between heat input and heat loss.
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temperature drops, the temperature of the heating water will increase one degree. The
starting point of the curves is adjustable, but comes factory selected at 70°F Outdoor
Temp. and 100°):DWHU7HPS)RUH[DPSOHZLWKD2'6<6UDWLRLIWKH
outdoor temperature is 50°F, this means the temperature has fallen 20° from the starting
point of 70°F. Therefore, the heating water temperature will increase 20° to 120°F.
Each building has different heat loss characteristics. A very well insulated building will
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degrees to increase the water temperature 1 degree. On the other hand, a poorly insulated
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This means that for each degree the outdoor temperature dropped the water temperature
will increase 2 degrees. The BCP-8W has a full range of Reset Ratios to match any
buildings heat loss characteristics.
A heating curve that relies not only on Outdoor temperature but also on the type of
radiation will improve heat comfort. The following are suggested initial settings for
different types of radiation based on average building insulation and heat loss. The
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Radiators (Steel & Cast Iron) 1.00 (OD) : 1.00 (SYS) Û)
Baseboard (Finned copper tube& Cast Iron) 1.00 (OD) : 1.00 (SYS) Û)
Radiant (High Mass/Concrete) 4.00 (OD) : 1.00 (SYS) Û)
Radiant (Low Mass/Joists) 2.00 (OD) : 1.00 (SYS) Û)
Fan Coils & Air Handlers 1.00 (OD) : 1.00 (SYS) Û)
Outdoor Temperature
Water Temperatur e
70 405060
130
120
110
100
Outdoor Temperature
Water Tem perature
70 405060
110
100
90
80
Outdoor Temperature
Water Tem perature
70 405060
150
140
130
120
1:4
With a 0° Offset, the
ratio curves begin at
100° Water Temperature.
With a -20° Offset, the
ratio curves begin at
80° Water Temperature.
With a +20° Offset, the
ratio curves begin at
120° Water Temperature.
1:4
1:4 1:1
1:1
1:1
4:1
4:1
4:1
90
100
+20 Offset
-20 Offset
(O) Outdoor Temperature (in °F)
70 60
50
40 20
30 0 -10
10 -20
100
120
110
130
140
150
160
180
170
190
200
210
220
1:3 1:2 1:1.5
1:1.25
1:1
1.25:1
1.5:1
2:1
3:1
4:1
(S) Water Temperature (in °F)
Reset Ratio Curves
Reset Ratio is Presented as
Outdoor Temp.(O) : Water Temp.(S) Ratio
1:4
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The BCP-8W has multiple operating modes that satisfy most hydronic systems. It can sequence stages to achieve an adjustable Set Point
or an Outdoor Reset Ratio. Moreover, when used with the 420MOD Interface it can accept a 4-20mA signal as a set point. The 420MOD
Interface must be purchased separately. This gives the BCP-8W the capability of being controlled remotely.
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by either closing the TSTAT input or opening the SHUTDOWN input, and when the outdoor temperature is below the Outdoor Cutoff, the
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BCP-8W will start calculating the Reaction Period. If after a full Reaction Time the control logic foresee additional stages are needed,
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When the BCP-8W PID logic foresees that the system will overshoot, regardless of the current system and target values, it will make sure
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satisfying the Minimum Runtime condition. That is, if the Set Point was 150°)DQGWKH/DVW6WDJH+ROGZDVVHWWR°F, the lead stage
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from short cycling.
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setting, as a mean to calculate the number of stages the BCP-8W shall have on at any point. For every Throttle Range below the set
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dropped below 175°F (180°F - 5°)WKHOHDGVWDJHZLOOHQHUJL]H:LWKIXUWKHUGHFUHDVHLQWKHV\VWHPYDOXHWR°F (180°F - 5°F - 5°F),
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As the system temperature rises towards the set point, stages will turn off. Using the previous example, when the system rise to 175°F
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point. This will leave the lead boiler A on until the temperature rises to 185°)WKHQWXUQRIIGHHQHUJL]H
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185°F
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166 to 169°F --- --- A,B --- A,B,C
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161 to 165°F --- --- A,B,C --- A,B,C,D
160°F 180 - (4)THR D A,B,C,D --- A,B,C,D
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saving features and give more comfortable heat when needed.
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The BCP-8W has been designed with Hydronic heating as the primary purpose. With this in mind, many of the BCP-8W features can
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8W versatile for many industries.
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Reset) or by maintaining an adjustable Set Point. The Outdoor Reset option uses an Outdoor Sensor (supplied with the control) and
achieves better fuel savings in addition to better comfort.
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results. However, OSS, can be used for applications where the load changes frequently and the sequencing must match the load and
its immediate change.
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Extension Panels, each with eight stages.
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 The control of the DHW is based on either a temperature sensor, can be purchased separately, on the DHW source or using a dry
contact from an aquastat. The BCP-8W provides multiple DHW Priority options based on the DHW piping. The Combustion Air
Damper output can be used in conjunction with the PROVE input to check the status of the Combustion Air Damper's End Switch,
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 The optional return line sensor, is purchased separately, can be connected to monitor and help protect the boilers from thermal
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one hour to every 41 days (999 hours).
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 The Day/Night Scheduling provides an adjustable time-based schedule for the Setback. It will be available when Shutdown or Tstat
is selected from the External Input Startup menu options.
 :hen Setback is selected from the External Input Startup menu options, an external signal can be used to switch the operation of
the BCP-8W in and out of setback mode
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increasing the target temperature for an adjustable period that follows the setback.
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Each of the BCP-8W and BCP-8X consists of three primary enclosure
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above the terminals. This switch is enclosed with the Enclosure Wiring
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on the base. The bottom section of the Enclosure Base contains the wiring
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8W or BCP-8X.
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operating temperature is from 20 to 120°F.
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removing the two bottom screws.
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mounting holes on the back of the enclosure.
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should not exceed ¼"
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 7KH%&3:LVGHVLJQHGWREHFRQQHFWHGWRDWHPSHUDWXUHVHQVRUIRULPPHUVLRQLQD,'ZHOO
located on the common header. Contact the factory for additional temperature sensor options.
 7HPSHUDWXUHVHQVRUZLUHVFDQEHH[WHQGHGXSWR¶E\VSOLFLQJVKLHOGHGFRQGXFWRUFDEOH%HOGHQRU
equivalent (#18/2)).
 7HPSHUDWXUHVHQVRUVKDYHQRSRODULW\&RQQHFWWKHWZRZLUHVIURPWKHVHQVRUWRWKH%&3:WHUPLQDOVPDUNHG
SYSTEM TEMP 27, 28.
 &RQQHFWWKHVKLHOGWRWKHFLUFOHGWHUPLQDOZLWKRQHRIWKHVHQVRUZLUHV'RQRWFRQQHFWWKHVKLHOGDWWKH
sensor end.
287'2256(1625:,5,1*7(50,1$/6
 :KHQ2XWGRRU5HVHWLVVHOHFWHGWKH%&3:ZLOOYDU\WKHV\VWHPWDUJHWEDVHGRQWKHRXWGRRUWHPSHUDWXUH
 :KHWKHULQ6HW3RLQWRU2XWGRRU5HVHWPRGHVWKHRXWGRRUVHQVRUFDQEHXVHGDVDQ2XWGRRU&XWRII7KH%&3
8W 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.
 )RUDQRXWGRRUVHQVRUXVHWKHSURYLGHG:HLO0F/DLQRXWGRRUVHQVRU
 7KHVHQVRUZLUHVFDQEHH[WHQGHGXSWR¶XVLQJVKLHOGHGFRQGXFWRUFDEOH%HOGHQRUHTXLYDOHQW
(#18/2)).
 7HPSHUDWXUHVHQVRUVKDYHQRSRODULW\&RQQHFWWKHZLUHVIURPWKHRXWGRRUVHQVRUWRWKH%&3:WHUPLQDOV
marked OUTDOOR TEMP - 29, 30. Connect the shield to the circled terminal 30 with one of the sensor wires.
Do not connect the shield at the sensor end.
Sensor Shiled
Outdoor Sensor
29 31
D
328 30 32
MP
OUTDOOR
TEMP
RETURN
TEMP
5(78516(1625:,5,1*7(50,1$/6237,21$/$9$,/$%/(,1+($7,1*21/<
 ,IWKH5HWXUQ6HQVRULVFRQQHFWHGPXVWEHSXUFKDVHGVHSDUDWHO\WKH%&3:ZLOOUHFRJQL]HLWDQGDOWHUQDWHLWV
temperature on the display with the Target temperature. If the Return is below the Minimum Return, the BCP-
8W will sequence stages based on the Return Sensor, Minimum Return, Calculated Target, and the actual System
Temperature.
 7KH5HWXUQRQWKH%&3:LVGHVLJQHGWREHFRQQHFWHGWRDWHPSHUDWXUHVHQVRUWKDWFDQEHSXUFKDVHGVHSDUDWHO\
IRULPPHUVLRQLQD,'ZHOO
 7KHVHQVRUZLUHVFDQEHH[WHQGHGXSWR¶XVLQJVKLHOGHGFRQGXFWRUFDEOH%HOGHQRUHTXLYDOHQW
(#18/2)).
 7HPSHUDWXUHVHQVRUVKDYHQRSRODULW\&RQQHFWWKHZLUHVIURPWKHRXWGRRUVHQVRUWRWKH%&3:WHUPLQDOV
marked OUTDOOR TEMP - 31, 32.
 &RQQHFWWKHVKLHOGWRWKHFLUFOHGWHUPLQDO32 with one of the sensor wires. Do not connect it to the sensor.
31
DHW
3330 32 34
Sensor Shiled
Return Sensor
D
OOR
MP
RETURN
TEMP
11
%&3:,QVWDOODWLRQDQG2SHUDWLRQ0DQXDO
:,5,1*7+('20(67,&+27:$7(5'+:6(16257(50,1$/6
 7KH'+:LQSXWFDQEHXVHGWRUDLVHV\VWHP6HW3RLQWWR)RU0D[LPXP7DUJHWZKLFKHYHULVORZHU7KH
DHW Piping on page 18 must be selected from the Startup Menu to determine the DHW Priority options.
 DHW Call terminals can be connected to either a dry-contact or a temperature sensor that can be purchased
VHSDUDWHO\IRULPPHUVLRQLQD,'ZHOO
 ,IXVLQJDGU\FRQWDFWZLUHDQDTXDVWDWRURWKHUFRQWUROVWRSURYLGHGU\FRQWDFWFORVXUHRQWKHDHW terminals.
 ,IXVLQJDVHQVRUWKHVHQVRUZLUHVFDQEHH[WHQGHGXSWR¶XVLQJVKLHOGHGFRQGXFWRUFDEOH%HOGHQRU
equivalent (#18/2)).
 7HPSHUDWXUHVHQVRUVKDYHQRSRODULW\&RQQHFWWKHZLUHVIURPWKH'+:VHQVRUWRWKH%&3:WHUPLQDOV
marked DHW - 33, 34. Connect the sensor shield to the circled terminal 34 with one of the sensor wires. Do not
connect the shield to the sensor.
 ,I6KXWGRZQZDVVHOHFWHGDVWKH([WHUQDO,QSXWDQ\'+:FDOOZLOOEHLJQRUHGZKHQWKH6KXWGRZQLVDFWLYH
Sensor Shiled
DHW Sensor
DHW
33 35
3
23436
3
P
SHUTDOWN
/TSTAT
/SETBACK
R
N
P
:,5,1*7+(6+87'2:17(50,1$/6
 7KLVIHDWXUHZLOORQO\EHDYDLODEOHZKHQ6KXWGRZQLVVHOHFWHGDVWKH([WHUQDO,QSXW0RGHRQSDJH18.
 7KLVIHDWXUHFDQEHXVHGZKHQHYHULWLVGHVLUDEOHWRWXUQRIIWKH%&3:VWDJHRXWSXWVIURPDUHPRWHORFDWLRQRU
another controller (i.e. EMS input).
 :KHQWKH6KXWGRZQLVHQDEOHGDOODFWLYHVWDJHVZLOOLPPHGLDWHO\WXUQRII7KH6\VWHP3XPS&RPEXVWLRQ$LU
DQGERLOHUSXPSVRUYDOYHVUHOD\VZLOOUHPDLQHQHUJL]HGIRUWKH5XQ2QGHOD\SHULRGDQGWKHQWXUQRII
 7KH6KXWGRZQVLJQDOPXVWEHDGU\FRQWDFWLQSXW1RYROWDJHFDQEHSODFHGDFURVVWKHSHUTDOWN terminals.
 %ULQJWKHWZRZLUHVIURPWKHGU\FRQWDFWWRWKHSHUTDOWN- 35,36 terminals.
 :KHQ6KXWGRZQLVVHOHFWHG6HWEDFNZLOOEHDYDLODEOHXVLQJWKHSURJUDPPHG'D\1LJKWVFKHGXOH
D
HW
3
3534 36
37 38
PROVE
Shutdown
Dry Contact
SHUTDOWN
/TSTAT
/SETBACK
:,5,1*7+(767$77(50,1$/6
 7KLVIHDWXUHFDQEHXVHGZKHQHYHULWLVGHVLUDEOHWRVZLWFKWKH%&3:WRRSHUDWHIURPDUHPRWHORFDWLRQLH
EMS input or thermostat). It will only be available when Tstat is selected as the External Input Mode option
from the Startup menu on page 18.
 :KHQWKH7VWDWLVHQDEOHGE\FORVLQJDGU\FRQWDFWWKH%&3:ZLOODFWLYDWHWKHKHDWLQJORJLF
 7KH7VWDWVLJQDOPXVWEHDGU\FRQWDFWRQO\1RYROWDJHFDQEHSODFHGDFURVVWKHTSTAT terminals.
 %ULQJWKHWZRZLUHVIURPWKHGU\FRQWDFWWRWKHTSTAT- 35,36 terminals.
 $IDFWRU\LQVWDOOHGMXPSHUSURYLGHVWKH7VWDWVLJQDO'RQRWUHPRYHWKHMXPSHUXQOHVVLWZLOOEHUHSODFHGE\D
Tstat signal.
 :KHQ7VWDWLVVHOHFWHGIURPWKH6WDUWXS([WHUQDO,QSXWPRGH6HWEDFNZLOOEHDYDLODEOHXVLQJWKHSURJUDPPHG
Day/Night schedule.
33 3534 36
37 38
PROVE
SHUTDOWN
/TSTAT
/SETBACK
Auxiliary
Input3
T-Stat
Dry Contact
:,5,1*7+(6(7%$&.7(50,1$/6
 7KLVIHDWXUHFDQEHXVHGZKHQHYHULWLVGHVLUDEOHWRVZLWFKWKH%&3:WRRSHUDWHLQ6HWEDFNIURPDUHPRWH
location (i.e. EMS input or external time clock). It will only be available when Setback is selected as the
External Input Mode option from the Startup menu. See page 18.
 :KHQWKH6HWEDFNLVHQDEOHGE\FORVLQJDGU\FRQWDFWWKH7DUJHWZLOOFKDQJHE\WKH6HWEDFNYDOXH7KDWLVWKH
Target will be reduced by the Setback value.
 7KH6HWEDFNVLJQDOPXVWEHDGU\FRQWDFWRQO\1RYROWDJHFDQEHSODFHGDFURVVWKHSETBACK terminals.
 %ULQJWKHWZRZLUHVIURPWKHGU\FRQWDFWWRWKHSETBACK- 35,36 terminals.
 :KHQ6HWEDFNLVVHOHFWHG1R'D\1LJKW6FKHGXOLQJZLOOEHDYDLODEOH
D
HW
3
SHUTDOWN
/TSTAT
/SETBACK
3534 36
37 38
PROVE
Setback
Dry Contact
:,5,1*7+(3529(7(50,1$/6
 7KH3URYHIHDWXUHLVSURYLGHGWRFKHFNV\VWHPFRPSRQHQWRSHUDWLRQEHIRUHHQHUJL]LQJWKHVWDJHV,WFDQEH
used to check on the Combustion Air Damper by connecting it to the end switch of the damper. In this case,
the Comb. Air Output option must be activated from the Startup Menu on page 18.
 ,IWKH&RPE$LU'DPSHU2XWSXWRSWLRQZDVQRWDFWLYDWHGWKHPROVE input can be used to check on the
6\VWHP2XWSXW$W\SLFDOXVHRIWKLVIHDWXUHLVWRFKHFNIRUV\VWHPSXPSÀRZEHIRUHHQHUJL]LQJDQ\VWDJH
 ,IWKHPROVE input is open on a call, the BCP-8W will enable only the System Output. All stage outputs will
be off when the PROVE input is open.
 $IDFWRU\LQVWDOOHGMXPSHUSURYLGHVWKH6\VWHP3URYHVLJQDO'RQRWUHPRYHWKHMXPSHUXQOHVVLWZLOOEH
replaced by a System Prove signal.
 %ULQJWKHWZRZLUHVIURPWKHGU\FRQWDFWWRWKHPROVE - 37, 38 terminals. No voltage can be placed across the
PROVE terminals
Prove
Dry Contact
RS485
36
37 38
PROVE
D
OWN
T
AT
B
ACK
12
%&3:,QVWDOODWLRQDQG2SHUDWLRQ0DQXDO
:$51,1*
7KH3529(LQSXWFDQQRWEHXVHGDVDVDIHW\OLPLW$OOHTXLSPHQWPXVWKDYHLWVRZQFHUWL¿HGOLPLWDQGVDIHW\
controls as required by local codes. No boiler stage will start unless the Prove terminals are shorted. DO NOT
remove the PROVE jumper supplied unless replacing it with a Prove signal.
:,5,1*7+(6<67(02873877(50,1$/6
 7KH6\VWHPRXWSXWKDVD1RUPDOO\2SHQ12UHOD\WKDWDFWVDVDGU\FRQWDFW,WGRHVQRWVRXUFHDQ\SRZHU
 &ODVVYROWDJHVPXVWHQWHUWKHHQFORVXUHWKURXJKDGLIIHUHQWRSHQLQJIURPDQ\&ODVVYROWDJHZLULQJ
6\VWHP2XWSXW2SHUDWLRQLQ6HW3RLQW0RGH
 7KH6\VWHPRXWSXWUHOD\ZLOOHQHUJL]HZKHQHYHUWKHRXWGRRUWHPSHUDWXUHGURSVEHORZWKH2XWGRRU&XWRIIRU
ZKHQHYHUDVWDJHRXWSXWLVDFWLYH,IQRRXWGRRUVHQVRULVFRQQHFWHGDQGWKHODVWERLOHUUHOD\KDVGHHQHUJL]HG
WKH6\VWHPUHOD\ZLOOUHPDLQHQHUJL]HGIRUDSHULRGVHWE\WKH5XQ2QDQGWKHQGHHQHUJL]H
 ,IWKHPROVELQSXWLV2SHQWKH6\VWHPUHOD\ZLOOUHPDLQHQHUJL]HGKRZHYHUDOOVWDJHVZLOOEHGHHQHUJL]HG
If a Prove is not required, the factory-installed jumper must remain connected for proper operation.
System
Pump
SYSTEM
DHW
PUMP
17
16 18
ge G
19
Stage H
2120 22
L
N
 $W\SLFDOXVHRIWKH6\VWHPRXWSXWLVWRDFWLYDWHDV\VWHPSXPSRULWVVWDUWHU7KHSXPSFDQUXQZKHQHYHUWKHUHLVDFDOOIRU
KHDW:KHQVWDJHVDUHQRORQJHUUHTXLUHGWKHSXPSZLOOVWD\DFWLYHIRUDQDGMXVWDEOH5XQ2QGHOD\DQGWKHQGHHQHUJL]H
6\VWHP2XWSXW2SHUDWLRQLQ5HVHW0RGH
 7KH6\VWHPRXWSXWUHOD\ZLOOHQHUJL]HZKHQHYHUWKHRXWGRRUWHPSHUDWXUHLVEHORZWKH2XWGRRU&XWRII
 :KHQWKHRXWGRRUWHPSHUDWXUHULVHV)DERYHWKH2XWGRRU&XWRIIWKH6\VWHPRXWSXWZLOOUHPDLQHQHUJL]HGIRUWKHSHULRGVHW
by the System Run-OnDQGWKHQGHHQHUJL]H.
:,5,1*7+('+:38037(50,1$/6
The BCP-8W can control the DHW Pump when the DHW Pump Output option is activated from the Startup Menu.
See page 18.
 7KH%&3:ZLOOHQHUJL]HWKH'+:3XPSZKHQHYHUWKHUHLVDFDOOIRU'+:XVLQJDGU\FRQWDFWRUZKHQWKH
DHW temperature falls below the DHW Set Point and DHW Differential when using a DHW sensor.
 7KH'+:3XPSRXWSXW relay is a Normally Open (N.O.) dry contact. It does not source any power.
 &ODVVYROWDJHVPXVWHQWHUWKHHQFORVXUHWKURXJKDGLIIHUHQWRSHQLQJIURPDQ\&ODVVYROWDJHZLULQJ
 ,I6KXWGRZQZDVVHOHFWHGDVWKH([WHUQDO,QSXWSDJH18), The BCP-8W will ignore a DHW call when the
Shutdown is active.
DHW
Pump
DHW
PUMP
7
18
19
a
ge H
2120 22
23
CO
M
A
I
SYSTEM
L
N
:,5,1*7+(&20%867,21$,5'$03(57(50,1$/6
The BCP-8W can control the Combustion Air Damper when the Comb. Air Output option is activated in the Startup
Menu (Page 18). In addition, the PROVE input will function as the Combustion Air Damper status checker.
 7KH%&3:ZLOOHQHUJL]HWKH&RPEXVWLRQ$LU'DPSHUUHOD\ZKHQHYHUWKHUHLVDFDOOWRHQHUJL]HDQ\RIWKH
boiler stages.
 7KH&RPEXVWLRQ$LURXWSXW relay is a Normally Open (N.O.) dry contact. It does not source any power.
 &ODVVYROWDJHVPXVWHQWHUWKHHQFORVXUHWKURXJKDGLIIHUHQWRSHQLQJIURPDQ\&ODVVYROWDJHZLULQJ
DHW
PUMP
21
0
22
23 24
COMB.
AIR
E
M
Comb.
Air
Damper
L
N
:,5,1*7+(67$*(67(50,1$/672
7KH%&3:FDQEHFRQ¿JXUHGWRRSHUDWHWKHVWDJHVRIWKHERLOHUV0RUHRYHULWFDQEHFRQ¿JXUHGWR
operate the boiler pumps or valves in addition to the boiler stages.
 7KHUHOD\VDUHN.O. dry contacts only. They do not source any voltage.
 :LUHWKH12UHOD\FRQWDFWVLQVHULHVZLWKWKHERLOHUVOLPLWFLUFXLW
 &ODVVYROWDJHVPXVWHQWHUWKHHQFORVXUHWKURXJKDGLIIHUHQWNQRFNRXWIURPDQ\&ODVVYROWDJH
wiring.
:,5,1*7+(67$*(2873876
 (DFK6WDJHRXWSXW$WKURXJK+KDVRQH12UHOD\
 :KHQZLULQJVHYHUDOPXOWLVWDJHERLOHUVVWDUWZLWKWKHORZHUVWDJHRIWKH¿UVWERLOHUDQGZLUHLWWR
Output A, followed by the higher stage of the same boiler and wire it to Stage B.
35
Stage A
7
Stage B
9
Stage C
11
Stage
Stage D
6 8 10 14
Lo Hi
Unit1
Stages
Lo Hi
Unit2
Stages
13
%&3:,QVWDOODWLRQDQG2SHUDWLRQ0DQXDO
:,5,1*7+(3803259$/9(2873876
 ,IWKH%&3:LVFRQ¿JXUHGWRRSHUDWH6WDJH3XPSVRU9DOYHV7KH\PXVWEHZLUHGWRWKHVWDJH
RXWSXWDIWHUWKHKLJKHVWVWDJHIRUWKDWERLOHU7KDWLVWKHORZVWDJHIRUWKH¿UVWERLOHUPXVWEH
connected to A and the higher stage of the same boiler must be connected to Stage B. The boiler
valve or pump for the same boiler must be connected to Stage C.
N
2
35
Stage A
7
Stage B
9
Stage C
11 13
Stage E Stage F
Stage D
6 8 10 12 144
Lo Hi
Unit1
Stages
Unit1
Pump
Lo Hi
Unit2
Stages
Unit2
Pump
L
N
&211(&7,1*727+(%&3;3$1(/6$1'02',17(5)$&(
 7KH%&3:LVHTXLSSHGZLWKDSKRQHVRFNHW56WRFRQQHFWWRWKH%&3;([WHQVLRQSDQHOVRUWKH02',QWHUIDFH
XVLQJWKHSURYLGHGSLQSKRQHFDEOH
 (DFK%&3;([WHQVLRQKDVWZR56FRPPXQLFDWLRQSRUWV8VHRQHWRFRQQHFWWRWKH%&3:8VHWKHRWKHUSRUWWR
connect to the second extension or the 420MOD Interface.
 $GGLWLRQDOFRPSDWLEOHGHYLFHVFDQXWLOL]HWKHVHFRQG56FRQQHFWLRQRQWKHVHFRQG%&3;([WHQVLRQ$QH[DPSOHZRXOG
EHWRXVHWKH02',QWHUIDFHWRSURYLGHDP$VHWSRLQWVLJQDOWRWKH%&3:
6(/(&7,1*7+(%&3;3$1(//(77(5
 7KH%&3:LVFDSDEOHRIFRPPXQLFDWLQJWRWZR%&3;([WHQVLRQV+RZHYHUHDFK
H[WHQVLRQPXVWEHLGHQWL¿HGDVHLWKHU$RU%XVLQJWKHVZLWFKRQHDFKH[WHQVLRQWRDYRLGKDYLQJ
communication problem.
 ([WHQVLRQ$6ZLWFKLVVHWWR$ZLOORSHUDWHVWDJHV,WKURXJK3:KLOH([WHQVLRQ%
(Switch is set to "B") will operate stages "Q" through "X".
Ext A
Ext B
Connecting BCP-8 to Two Extension Panels
and 420MOD Interface using RS485
BCP-8
HYDRONIC SEQUENCING CONTROL
SYSTEM
DHW PUMP
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
CAUTION: Risk of Electric Shock.
PWR
LN
12
SENSORS MUST BE GOLD SERIES
SYSTEM
3
DHW
PUMP
5
Stage A
7
Stage B
9
Stage C
11 13
Stage E
15
Stage F
17
Stage D
6 8 10 12 14
16 18
RS485
SYS=144F OD=35F
<AB
>DE GH JK
HI LO -- OFF
4
Stage G
19
Stage H
21
OUTDOOR
TEMP
27 29 31
DHW
33
SHUTDOWN
/TSTAT
/SETBACK
35
RETURN
TEMP
20 22 28 30 32 34 36
STAGE MENU
Stage E
Stage F
Stage G
Stage H
Stage A
Stage B
Stage C
Stage D
25 26
PRESS
+ -
37 38
PROVE
TEMP
PROGRAM RUN
23 24
COMB.
AIR
DO NOT APPLY ANY VOLTAGE TO INPUT TERMINALS
COMB. AIR
ENCLOSED
ENERGY
MANAGEMENT
EQUIPMENT
LISTED
99RA
CUS
O
P
Power
CAUTION:
Risk of Electric Shock.
PWR
LN
12
I
34
J
56
K
78
L
910
M
11 12
EXTENSION
MODULE
RS-485
Ext A
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
OUTPUT RATINGS:
120VAC, 6A RESISTIVE
1A PILOT DUTY, 15A TOTAL
FOR ALL CIRCUITS
Ext B
L
M
N
Comm
T
U
V
W
X
N
13 14
Q S UR T V
BCP-8X A
Use Copper Conductors Only.
I
J
K
Q
R
S
O
15 16
P
17 18
W X
O
P
Power
CAUTION:
Risk of Electric Shock.
PWR
LN
12
I
34
J
56
K
78
L
910
M
11 12
EXTENSION
MODULE
RS-485
Ext A
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
OUTPUT RATINGS:
120VAC, 6A RESISTIVE
1A PILOT DUTY, 15A TOTAL
FOR ALL CIRCUITS
Ext B
L
M
N
Comm
T
U
V
W
X
N
13 14
Q S UR T V
BCP-8X B
Use Copper Conductors Only.
I
J
K
Q
R
S
O
15 16
P
17 18
W X
4-20 mA EMS
4-20mA INPUT
+
Signal GND
1
2
3
RS485
EXTENSION
CONNECTORS
420MOD EMS Interface
4-20mA
EMS Signal
(+)
(-)
6 Pin Phone Cable (provided with Extension)
6 Pin Phone Cable (provided with 420MOD EMS Interface)
SEQUENCING CONTROL EXTENSION
BCP-8X
SEQUENCING CONTROL EXTENSION
BCP-8X
BCP-8W
14
%&3:,QVWDOODWLRQDQG2SHUDWLRQ0DQXDO
S
-
-----
SETTINGS
------
S
eason
Wi
n
t
er
<
Outdoor Rst>
1
35 F
Set Point
135
F
EMS Set Point
135
F
Mi
n
R
e
t
urn
110
F
<
System Settings>
<
Maintenance>
<System Startup>
BACK SELECT
,
167$//(5
0
(18
6
(
4
8(1&(
SYS
=
168
FOD
=
45
F
TGT
=
172
F
ABC <EFG >
---- LO
BOILER MENU
-
--- CONTROL MODE --
-
Outdoor Reset
Set Point
EMS 4-20m
A
BACK SAVE
-
--- DISPLAY UNIT --
-
F
C
BACK SAVE
EMS 4mA SET POINT
100
F
[
]
BACK SAVE
E
MS 20mA SET POIN
T
170
F
[
]
BACK SAVE
-
---
DHW PIPING
---
Parallel
Primary/Secondar
y
BACK SAVE
-
-DHW PUMP OUTPUT--
No
Yes
BACK SAVE
-
-COMB. AIR OUTPUT--
No
Yes
BACK SAVE
-
-- BURNER TYPE ----
On/Off
2
-
Stage
3
-Stage
4
-Stage
BACK SAVE
-
-
BOILER OUTPUT
-
-
None
Pump
V
alve
BACK SAVE
-
-
TOTAL BOILERS
-
-
8
[
]
BACK SAVE
-
-----
STAGING
------
M
ultiple Outputs
S
ingle Outpu
t
BACK SAVE
-
-----
SEQUENCE
-------
Lo/Hi/Lo/Hi
Lo/Lo/Hi/Hi
BACK SAVE
-
-- CONTROL LOGIC---
PID
OSS
BACK SAVE
-
-- SENSOR FAULT ---
Stages On
Stages Off
BACK SAVE
ARE YOU SURE
?
No
Yes
BACK SAVE
(
06 6(
7
32,17
-
---
MAINTENANCE
----
U
n
it
F
Present Time
12
:
30P
<
Sensor Trim>
<Hi
s
t
or
i
es
>
<Configuration>
BACK SELECT
--- SENSOR TRIM ---
-
System Trim
+0
F
Outdoor Trim
+0
F
Return Trim
+0
F
D
HW Trim +0 F
BACK SELECT
Sys=12
0
F
1
0:00AM
BACK NEXT
BCP
-
8W V1.00
Outdoor reset
D
ay/Night Schedul
e
D
HW Parallel
BACK SELECT
$
/
(57
7RDFFHVV,QVWDOOHU0HQXKROG
do
wn th
e
M
e
n
u
bu
tt
o
n f
o
r
o
v
er
t
h
ree secon
ds
.
7REHDEOHWRFKDQ
J
HWKH%
&
3:
s
ettings the Program/Run Switch
m
ust
b
e set to
P
rogra
m
.
6
6
7$5783
&
0
$,17(1$1
&
(
-
-
EXTERNAL INPUT -
Shutdown
Tstat
Setback
BACK SAVE
15
%&3:,QVWDOODWLRQDQG2SHUDWLRQ0DQXDO
S
-
----
SETTINGS
-----
-
Season
Winter
<O
u
td
oor
R
s
t>
135
F
S
et Poin
t
1
35
F
EMS Set Point
135
F
Min Return
110
F
<System Settings>
<
Maintenance>
<
System Startup>
BACK SELECT
----
SEASON
--
-
Winter
Summe
r
BACK SAVE
--
OUTDOOR RESET
-
Reset Ratio
7
Target Offset +0 F
Outdoor Cutoff 65 F
Min.Target
120
F
Max.Target
120
F
BACK SELECT
-
--- RESET RATIO ---
C
us
t
om
1(8.00
OD
:
1.00
SYS)
2(4.00
OD
:
1.00
SYS)
3
(3.00
O
D:1.00
S
YS)
4(2
.
00
OD
:
1
.
00
SYS)
5(1.50
OD
:
1.00
SYS)
6(1.25
OD
:
1.00
SYS)
7(1.00
O
D:1.00
S
YS)
8(1.00
O
D:1.25
S
YS)
9(1.00
O
D:1.50
S
YS)
10(1.00
OD
:
2.00
SYS)
11(1.00
OD
:
3.00
SYS)
12(1.00 OD:4.00
S
YS)
BACK SAVE
-
- SET SYS TEMP.1
-
100
F
[
]
]
BACK SAVE
--
AT OD TEMP.1
---
7
0
F
[
]
]
BACK SAVE
--
SET SYS TEMP.2
-
170
F
[
]
BACK SAVE
-- AT OD TEMP.2 ---
0
F
[
]
BACK SAVE
-- TARGET OFFSET --
-
+
0
F
[
]
BACK SAVE
-- OUTDOOR CUTOFF -
-
60
F
[
]
BACK SAVE
---- MIN TARGET ---
-
140
F
[
]
BACK SAVE
----
MAX TARGET
---
-
20
0
F
[
]
BACK SAVE
-
----
SET POINT
----
-
140
F
[
]
BACK SAVE
-
-
EMS SET POINT
-
-
140 F
BACK SAVE
- SYSTEM SETTINGS -
<Stage Settings>
<Setback Schedule>
<DHW Settings
>
Setback
0
F
Run
-
On
2min
Pump Exercise
Off
BACK SELECT
-
---
MIN RETURN
----
120
F
[
]
BACK SAVE
-
---
RETURN LAG
----
2min
[
]
BACK SAVE
---
PUMP EXERCISE
-
-
Off
On
BACK SAVE
-
------
RUN
-
ON
------
-
2min
[
]
BACK SAVE
-
-----
SETBACK
------
-
0 F
[ ]
BACK SAVE
-- DHW SETTINGS ---
D
HW Temp
.
120 F
DHW
Prior
Tmr
60min
DHW Set Point
120
F
D
HW Diff
.
5 F
BACK SELECT
DHW PRIORITY TIMER
2min
[
]
BACK SAVE
-
-
DHW SET POINT
--
140
F
[
]
BACK SAVE
DHW DIFFERENTIAL
10
F
[
]
]
BACK SAVE
SYS=168 F OD=45
F
TGT
=
172
F
ABC
<EFG
>
---- L
O
BOILER MENU
'+:
6
6
(77,1
*
*
6
6
6
5(
6
(
7
2
5$7,
2
6
6
(
7
2
3
2
,1
7
16
%&3:,QVWDOODWLRQDQG2SHUDWLRQ0DQXDO
S
-----
SETTINGS
------
Season
W
inter
<Outdoor Rst>
1
35
F
Set Point
135
F
EMS Set Point
135
F
Mi
n
R
e
t
urn
110
F
<System Settings>
<Maintenance>
<System Startup>
BACK SELECT
- SYSTEM SETTINGS
-
<Stage Settings
>
<Setback Schedule>
<DHW Settings>
Setback
0
F
Run-O
n
2
min
Pump Exercise
O
ff
BACK SELECT
--
STAGE SETTINGS
-
-
Reaction Time
1min
Purge Delay
0.0min
Min Runtim
e
2min
Standby Dela
y
10min
Last
Stage
Hold
5
F
Throttle
2
F
<Lead Settings
>
BACK SELECT
--
LEAD SETTINGS
--
Lead Boiler
AB
R
otate Mode Time
BACK SELECT
--
REACTION TIME
--
1mi
n
[
]
]
BACK SAVE
---
PURGE DELAY
---
-
1.0min
[ ]
BACK SAVE
- MINIMUM RUNTIME
-
2mi
n
[
]
]
BACK SAVE
-- STANDBY DELAY --
10mi
n
[
]
]
BACK SAVE
LAST STAGE HOLD
0
F
[]
BACK SAVE
SYS=
168
F OD=
45
F
TGT
=
172
F
ABC <EF
G
>
---- LO
BOILER MENU
-
---- BOILER AB ----
-
Mode
Auto
Runtime
58Hrs
<Prev Boiler>
<Next Boiler>
BACK SAVE
-
- BOILER AB MODE -
A
uto
S
tandby
Off
On
BACK SAVE
B
OILER AB RUNTIM
E
58hrs
BACK CLEAR OK
S
ETBACK SCHEDUL
E
Setbac
k
0
F
Present Time
**:**
Day Schdul
7
:
00Am
Night Schdu
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BACK SELECT
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SETBACK
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0
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-- NIGHT SCHEDULE -
-
07
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Pm
BACK SAVE
--
DAY SCHEDULE
---
-
07:**Am
BACK SAVE
- SET PRESENT TIME
**:*
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BACK SAVE
--
LEAD BOILER
--
A
B
CD
BACK SELECT
-- LEAD ROTATION --
T
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Manual
FOFO
BACK SELECT
AUTO ROTATE PERIOD
24hr
s
[
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BACK SAVE
-
-------
BOOST
---------
0
F
[
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BACK SAVE
-
-----
BOOST PERIOD
--
-
30min
[
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BACK SAVE
-- THROTTLE RANGE -
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2
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Can be accessed by holding down the Menu
button for over three seconds.
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To be able to change the BCP-8W 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.
PROGRAM RUN
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Hold Button: MENU/<System Startup>
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ARE YOU SURE?
No
Yes
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described in this section.
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Hold Button: MENU/<System Startup>/..../Control Mode
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 2XWGRRU5HVHWPRGHUHTXLUHVWKHXVHRIDQRXWGRRUVHQVRU'2127VHOHFW2XWGRRU
Reset without an outdoor sensor.
---- CONTROL MODE ---
Outdoor Reset
Set Point
EMS 4-20mA
BACK SAVE
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an Outdoor Cutoff point. That is, to turn the stages, system, and Comb. Air relays off.
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Hold Button: MENU/<System Startup>/..../Display Unit
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the critical factor. It allows the user to display temperature information and settings in
either ºF (Fahrenheit) or ºC (Celsius). Select the display unit that is best suited for your
application.
---- DISPLAY UNIT ---
F
C
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Hold Button: MENU/<System Startup>/..../EMS 4mA Set Point/EMS 20mA Set Point
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accept the 4-20mA signal and transmit it to the BCP-8W.
EMS 4mA SET POINT
100 F
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temperature set point, then the 20mA temperature set point.
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2-22mA range. The display will show the message "Shutdown by EMS" and all
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EMS 20mA SET POINT
170 F
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check all operating settings and adjustments to match the new settings.
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Hold Button: MENU/<System Startup>/..../DHW Piping
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priority will only take place during heating periods. See the DHW Priority Timer on
page 28.
---- DHW PIPING ---
Parallel
Primary/Secondary
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DHW even during the Summer or when outdoor temperature is above the Outdoor Cutoff. No priority will be available.
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A DHW call can be initiated by either a dry contact or using a Weil McLain Sensor (389-900-230)
for immersion in a 3/8ID well (592-300-023). The use of a sensor will allow the adjustment of the
DHW Set Point and DHW Differential.
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Hold Button: MENU/<System Startup>/..../DHW Pump Output
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to select if the BCP-8W should be controlling the DHW Pump or not.
--DHW PUMP OUTPUT--
No
Yes
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Hold Button: MENU/<System Startup>/..../Comb. Air Output
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allows the user to select if the BCP-8W should be controlling the Combustion Air
Damper or not.
- COMB. AIR OUTPUT-
No
Yes
BACK SAVE
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 On a prove failure situation, the message "Wait for Comb. Prove". No boiler stages will be active until the Prove
input is Shorted.
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FailureZLOOGLVSOD\XQWLOWKHVLWXDWLRQLVUHFWL¿HG
 ,I1RLVVHOHFWHGWKHPROVE input will be used to check System status instead of the Combustion Air Damper.
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Hold Button: MENU/<System Startup>/..../External Input
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WHUPLQDOVDQGWRWXUQRIIDOOUHOD\VLQFOXGLQJDOOERLOHUVVWDJHV
 :KHQ6KXWGRZQLVVHOHFWHG'+:FDOOVZLOOEHLJQRUHGXQOHVVWKHFRQWUROLVRXWRI
Shutdown.
-- EXTERNAL INPUT -
Shutdown
Tstat
Setback
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 7KH7VWDWRSWLRQJLYHVWHUPLQDOV35 and 36 the capability of functioning as a heat-call. That is, when terminals 35 and 36 are
shorted, the BCP-8W will sequence the stages. However, when they are opened, all stages will turn off. Thus, do not remove
the factory installed jumper unless it was replaced with a Tstat signal.
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the External Input, or an external dry contact signal to switch to setback by selecting Setback from this menu.
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Hold Button: MENU/<System Startup>/..../Burner Type
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the option based on your boiler number of stages.
--- BURNER TYPE ----
On/Off
2-Stage
3-Stage
4-Stage
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Hold Button: MENU/<System Startup>/..../Boiler Output
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additional boiler pumps or valves.
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pumps. The pump stage will run for the Run-On delay after the lower stage of that boiler
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-- BOILER OUTPUT --
None
Pump
Valve
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Hold Button: MENU/<System Startup>/..../Boiler Output
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determine the total number of outputs the BCP-8W will need to control.
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control and extension stages, the additional boilers containing these stages will have CE
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-- TOTAL BOILERS --
8
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Hold Button: MENU/<System Startup>/..../Staging
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stages. These boilers will need to select the Multiple Output option. That means, both
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option.
------ STAGING ------
Multiple Outputs
Single Output
BACK SAVE
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Hold Button: MENU/<System Startup>/..../Sequencing
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sequence the lower stages of all Automatic boilers before sequencing the higher stages.
------ SEQUENCE -------
Lo/Hi/Lo/Hi
Lo/Lo/Hi/Hi
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higher stage of the lag boiler.
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Hold Button: MENU/<System Startup>/..../Sequencing
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and the Boiler Minimum Run Time. The PID relies on the rate of change in the System
Temperature. The PID logarithmic calculations foresee changes and sequence stages
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--- CONTROL LOGIC---
PID
OSS
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the Target Temperature. At one Throttling range below the Set Point, only one stage will be on. For each additional Throttling
range below the Set Point, an additional stage will be activated. The last stage on will be allowed to exceed the Set Point by one
Throttling range before turning off that stage. This helps to prevent the last stage from short cycling.
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Hold Button: MENU/<System Startup>/..../Sensor Fault
 The Sensor Fault will determine the operating status of all output stages set to Auto or
Standby when a sensor reads Short or Open.
--- SENSOR FAULT ---
Stages On
Stages Off
BACK SAVE
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the Shutdown was active, all stages will be Off on a sensor fault.
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outdoor is below the Outdoor Cutoff. When the Outdoor reads Short or Open, the BCP-8W will change the Target to the
Maximum Target.
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the Outdoor reads Short or Open, the BCP-8W will change the Target to the Minimum Target.
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To Reset the BCP-8W control to its original factory defaults, power down the control. Hold
down the two right most buttons while powering the control back up until the Total
Clear Started screen appears. The Display will direct you to the Startup menu to
program the control after the defaults are loaded.
TOTAL CLEAR STARTED
Release buttons
and
Please Wait
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Do not turn off power to control until all Startup settings have been made. Otherwise, the next
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To be able to change the BCP-8W 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.
PROGRAM RUN
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Weil-McLain BCP-8S User manual

Weil-McLain
Brand
Weil-McLain
Model
BCP-8S
Category
Water heaters & boilers
Type
User manual
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