North Chem Pump Plug

B2 Chem

B2 Chem

South Chem Pump Plug

B1 Chem

B1 Chem

Power Supply120 VAC

RP R4A cct 13

PL-5 PL-6

D1 D3

8104 612

H AO

B1 Chem H-O-A

B1 Chem Pump

CR-5

D2 D4

Neu

tral

H AO

B1 Blowdown

H-O-AB1

BlowdownCR-6

PL-7

H AO

B2 Chem H-O-A

B2 Chem Pump

CR-7

PL-8

H AO

B2 Blowdown

H-O-AB2

Blowdown

CR-8

P27 Starter

Aux

P28 Starter

Aux

P29 Starter

Aux

P30 Starter

Aux

P27 Status

CR-1

P28 Status

CR-2

P29 Status

CR-3

P30 Status

CR-4

CN

N

H

24 VAC from Xfmr Panel

(Siemens dwg 118)

24H 24N 13 CHEM PUMP

Legend

Existing wires & devices shown in solid lines & black text

New wiring & devices shown in dashed lines & blue text

White wires shown in grey

Relay coil

Status light

Terminal (labelled “T”)T

22 AWG twisted pair

DATE CREATED

2016-01-21CREATED BY

Andrew Snider, IntellitonDATE REVISED REVISED BY

DWG TITLE

Boiler Water Treatment ControlDWG NO.

BLR-CHEMCTL

SITE

First Canadian Centre, 350 7th Avenue SW, Calgary, ABREVISION HISTORY

# DATE BY DESCRIPTION

1 2016-01-21 Andrew Snider, Intelliton As-built

B2CH HAND

B1CH AUTO

B1B AUTO

B2CH AUTO

B2B AUTO

B1CH HAND

B1B HAND

B2B HAND

B2 BDN24N

B1CHEM

5.0.4.1

B1BDN

5.0.4.2

B2CHEM

5.0.4.3

B2BDN

5.0.4.4

New

BA

S O

utpu

ts

P27S

5.0.3.13

+

-

P28S

5.0.3.14

+

-

P29S

5.0.3.15

+

-

P30S

5.0.3.16

+

-

New

BA

S In

puts

B1 BDN

CHEM PUMPN

Boiler Feedwater Pump Control

PanelAt Deaerator

“CP-J”South of “Chemical Treatment” Panel

“FCC NODE 5”South of “CP-J”

“Boiler Water Treatment Control”Boiler Room West Wall Near Chemical Batch Tanks

120 VAC

120 VAC

120 VAC

120 VAC

16 AWG TEW

N

H

N

H

SV-1B1 Blowdown

Solenoid Valve

SV-2B2 Blowdown

Solenoid Valve

CR-5

CR-6

CR-8

CR-7

DATE CREATED

2016-01-21CREATED BY

Andrew Snider, IntellitonDATE REVISED REVISED BY

DWG TITLE

Boiler Water Treatment Control BOMDWG NO.

BLR-CHEMCTL BOM

SITE

First Canadian Centre, 350 7th Avenue SW, Calgary, ABREVISION HISTORY

# DATE BY DESCRIPTION

1 2016-01-21 Andrew Snider, Intelliton As-built

Control Device Service Qty Model Mfr Document Number DescriptionCR-1, CR-2, CR-3, CR-4 Feedwater pump status relays 4 NBA200 120FL CARLO GAVAZZI Power Relays Type NA/NF/NP/NB Monostable 120 VAC coil, DPST, 25 ACR-5, CR-6, CR-7, CR-8 Boiler chemical pump & blowdown valve control relays 4 NBA200 24FL CARLO GAVAZZI Power Relays Type NA/NF/NP/NB Monostable 24 VAC coil, DPST, 25 APL-5, PL-6, PL-7, PL-8 Boiler chemical pump & blowdown valve pilot lights 4 LEDTEC-Red-024 Techna LEDtec LED Indicators 24 VAC, 12 mA / 0.288 W, redSV-1, SV-2 Boiler blowdown solenoid valves 2 8220G409 ASCO 2/2 SERIES Hot Water / Steam 120 VAC, 10.1 W, 19 mm (3/4") pipe, Cv 8.8

Blowdown Control

1. Each boiler's automated blowdown solenoid valve (B1BDN & B2BDN) is in series with a continuous blowdown valve ("CBD") which is manually set by the operator. The CBD is used to regulate the blowdown flow rate when the automated blowdown solenoid valve is open. It is recommended to leave both CBDs at the same setting & use the operator-entered blowdown runtime multipliers (B1BDNTM & B2BDNTM) to adjust the amount of time that the automated blowdown solenoid valves open, as described below.

4. Operator control of each boiler's blowdown runtime is effected by adjusting its operator-entered blowdown runtime multiplier (B1BDNTM & B2BDNTM), which works as follows.Each boiler's blowdown runtime setpoint (B1BDNTS & B2BDNTS, minutes) is calculated at the beginning of each sampling interval based on its feedwater pump runtime during the preceding sampling interval (B1FPSINTT & B2FPSINTT, minutes) & its operator-entered blowdown runtime multiplier (B1BDNTM & B2BDNTM):

B?BDNTS = B?BDNTM * B?FPSINTT

Example: if boiler 1 feedwater pump ran for 3 minutes (B1FPSINTT) & the boiler 1 blowdown runtime multiplier (B1BDNTM) is set at 1.5, then the boiler 1 blowdown runtime setpoint (B1BDNTS) = 1.5 * 3 = 4.5 minutes.

2. Throughout each sampling interval, each boiler's blowdown solenoid runtime is tracked via its blowdown solenoid timer (B1BDNT & B2BDNT, minutes).3. Each boiler's blowdown solenoid valve (B1BDN & B2BDN) is commanded on (open), if the boiler's burner is proven on (B?BS = on), until the blowdown runtime (B1BDNT & B2BDNT, minutes) reaches the blowdown runtime setpoint (B1BDNTS & B2BDNTS).

4. The total runtime of each boiler's two feedwater pumps is tracked during each sampling interval.

Feedwater Pump Status Points:

Boiler 1: P27S, P29SBoiler 2: P28S, P30S

At the beginning of each sampling interval, each boiler's feedwater pump runtime total from the preceding interval is written to the boiler feedwater pump interval runtime (B1FPSINTT & B2FPSINTT, minutes) & the runtime total is reset to 0 minutes.5. For operator information only.At the beginning of each interval, each boiler's average burner output for the preceding sampling interval is written to its burner output average point (B1BOPA & B2BOPA, %).At the beginning of each sampling interval & immediately before the interval timer (BLRCHT) is reset to 0 minutes, the following calculations are made:

Boiler ? feedwater pump runtime as a percentage of interval time: B?FPSTP = 100 * (B?FPSINTT / BLRCHT)Boiler ? feedwater pumping rate (ratio of feedwater pump runtime percentage to average burner output): B?FRATE = 100 * B?FPSTP / B?BOPA

Chemical Pump Control

1. Each boiler's automated chemical injection pump (B1CHEM & B2CHEM) has a speed setting & a volume setting which are manually set by the operator. The speed & volume settings are used to regulate the rate of chemical injection when the chemical injection pump is running. It is recommended to leave both chemical injection pumps at the same speed & volume settings & use the operator-entered chemical injection pump runtime multipliers (B1CHEMTM & B2CHEMTM) to adjust the amount of time that the chemical injection pumps run, as described below.

4. Operator control of each boiler's chemical injection pump runtime is effected by adjusting its operator-entered chemical injection pump runtime multiplier (B1CHEMTM & B2CHEMTM), which works as follows.Each boiler's chemical injection pump runtime setpoint (B1CHEMTS & B2CHEMTS, minutes) is calculated at the beginning of each sampling interval based on its feedwater pump runtime during the preceding sampling interval (B1FPSINTT & B2FPSINTT, minutes) & its operator-entered chemical injection pump runtime multiplier (B1CHEMTM & B2CHEMTM):

B?CHEMTS = B?CHEMTM * B?FPSINTT

Example: if boiler 1 feedwater pump ran for 3 minutes (B1FPSINTT) & the boiler 1 chemical injection pump runtime multiplier (B1CHEMTM) is set at 2, then the boiler 1 chemical injection pump runtime setpoint (B1CHEMTS) = 2 * 3 = 6 minutes.

2. Throughout each sampling interval, each boiler's chemical injection pump runtime is tracked via its chemical injection pump timer (B1CHEMT & B2CHEMT, minutes).3. Each boiler's chemical injection pump (B1CHEM & B2CHEM) is commanded on until its chemical injection pump runtime (B1CHEMT & B2CHEMT, minutes) reaches the calculated chemical injection pump runtime setpoint (B1CHEMTS & B2CHEMTS).

3. The timer reset point BLRCHTRST turns on automatically when interval timer BLRCHT reaches interval time setpoint BLRCHTINT. The timer reset point BLRCHTRST may also be turned on by operator command to initiate the start of a new sampling interval.

Sequence of Operations

Interval Operations

1. The chemical interval time setpoint (BLRCHTINT) is an operator-entered setpoint (5 to 150 minutes, initially set at 15 minutes) which divides the day into sampling intervals.2. Each sampling interval begins when the timer reset point (BLRCHTRST) turns on, resetting the chemical interval timer (BLRCHT, minutes) to 0 minutes.