Weil-McLain BOILER SEQUENCING CONTROL User Manual

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BSC Installation and Operation Manual

SYSTEM RUN-ON

Adjustable from 0 to 360 minutes Default: 0 minutes

SELECT: MENU/System Settings/Standby Time

 7KH6\VWHPRXWSXWUHOD\ZLOOHQHUJL]HZKHQHYHUWKHUHLVDFDOOIRURXWSXWDQGWKH

Shutdown feature is not active.

---- SYSTEM RUN-ON ---

0min

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 7KH6\VWHPZLOOUHPDLQHQHUJL]HGZKLOHDQ\6WDJHLVDFWLYH:KHQWKHODVW6WDJHUHOD\WXUQVRIIWKH6\VWHPRXWSXWZLOOUHPDLQ

HQHUJL]HGIRUWKHSHULRGRIWLPHVHWE\WKH6\VWHP5XQ2Q

 ,IWKH6\VWHP5XQ2QLVVHWWRWKHSystem output will turn off immediately when the last Stage turns off.

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desirable to run the system pump for an additional period of time to transfer the residual heat from the boilers to the building.

 :KHQ2XWGRRU&XWRIILVXVHGWKH 6\VWHPRXWSXWUHOD\ZLOOUHPDLQHQHUJL]HGZKHQHYHUWKHRXWGRRUWHPSHUDWXUHLVEHORZWKH

2XWGRRU&XWRII+RZHYHUZKHQWKHRXWGRRUWHPSHUDWXUHULVHV°F above the Outdoor Cutoff, the System relay will remain

HQHUJL]HGIRUWKH5XQ2QSHULRGEHIRUHWXUQLQJRII

SETBACK

Adjustable from 0F°/0C° to 75F°/24C° Default: 0F°/0C°

SELECT: MENU/System Settings/More Settings/Standby Time

(Not Available in Reset Modes or EMS Modes)

 7KH6HWEDFNIHDWXUHFDQEHXVHGWRSURYLGHWKH%6&ZLWKDORZHUWHPSHUDWXUHSUHVVXUH

Set Point when less load is required.

------- SETBACK -------

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 7KHORZHU6HW3RLQWZLOODSSHDURQWKHPDLQGLVSOD\LQGLFDWLQJWKLVFRQGLWLRQ

 $W\SLFDOXVHIRU6HWEDFNLVWRSURYLGHOHVVV\VWHPWHPSHUDWXUHSUHVVXUHWRDIDFWRU\RUEXLOGLQJGXULQJWKHQLJKWRURQWKHZHHNHQGV

when product is not being manufactured or tenants are asleep or out, but heat is still required.

 7KH6HWEDFNZLOOQRWEHDFWLYDWHGXQOHVVDVLJQDOLVZLUHGLQWRWKH%6&EMS terminals. See Wiring the Setback on page 8.

 ,Q+HDWLQJPRGHWKHDPRXQWRI6HWEDFNVHOHFWHGLVVXEWUDFWHGIURPWKH6HW3RLQWZKHQD6HWEDFNVLJQDOLVUHFHLYHG

 )RUDWHPSHUDWXUHH[DPSOHLIWKH6HW3RLQWLV)DQGWKH6HWEDFNLV)WKHQZKHQWKHEMS (+) and SIGNAL terminals are

FORVHGWKH%6&ZLOOKROGD6HW3RLQWRI)

ROTATE TIME

Adjustable from 1 to 999 hours Default: 24 hours

SELECT: MENU/System Settings/More Settings/Lag Delay

 7KH5RWDWH7LPHRQO\WDNHVHIIHFWLIWKH$XWR5RWDWHW\SHLV7LPH6HH/HDG$XWR

Rotate on page 1.

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rotation, at 2 am every morning the Lead Stage will be the next stage in Auto Mode.

-AUTO ROTATE PERIOD-

0.0 hr

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H[DPSOHZLWKDKRXU5RWDWH7LPHWKH/HDG6WDJHZLOOURWDWHIURP$WR%DIWHUWKH¿UVWKRXUVRIRSHUDWLRQDQGWKHQIURP%WR

C after the next 12 hours, and so on.

LAST-STAGE-HOLD

Adjustable from 0Fº/0Cº to 30Fº/17Cº Default: 0Fº/0Cº

SELECT: MENU/System Settings/More Settings/Last-Stage-Hold

(Not Available in Process)

 7KH/DVW6WDJH+ROGSUHYHQWVVKRUWF\FOLQJRIWKH/HDG6WDJHGXULQJORZORDG

FRQGLWLRQVZKHUHWKHV\VWHPPLJKWKDYHDORDGWKDWLVVLJQL¿FDQWO\OHVVWKDQWKH

minimum output of one stage. When the BSC brings on the Lead Stage, the Set Point

is quickly exceeded, and the Lead Stage is turned off. To prolong the run time during

WKLVW\SHRIFRQGLWLRQXVHWKH/DVW6WDJH+ROGVHWWLQJ

 7KH%6&ZLOODOORZWKHV\VWHPWRH[FHHGWKH6HW3RLQWE\WKH/DVW6WDJH+ROGYDOXH

selected, before the Lead Stage is turned off.

- LAST STAGE HOLD -

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UHDFKHV)'XULQJWKDWSHULRGWKHGLVSOD\ZLOOVKRZHold Until 170FWKHQWKHOHDGVWDJHZLOOWXUQRII

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Weil-McLain BOILER SEQUENCING CONTROL Controller

User Manual - Page 21