1 of 12 © 2003 A 264 - 10/03

- Application BrochureBoiler Control 264

A 26410/03

Features of the Boiler Control 264Please refer to Essay E 005: Control Functions and Benefits for a detailed description of these features.

ApplicationThe tekmar Boiler Control 264 can control the supply water temperature from up to 4 on / off stages based on outdoor temperature, control for Domestic Hot Water (DHW) generation, or a setpoint requirement. A large easy to read display provides current system temperatures and operating status. The control has outputs for a primary pump and either a combustion air damper or alarm. Based on the mode of operation selected, the control can operate different combinations of boiler stages and boiler pumps.

• Outdoor Reset• Characterized Heating Curve• Water Temperature Setback• Boost• Warm Weather Shut Down• Boiler Outdoor Reset• Boiler Differential (Automatic)• Boiler Minimum Supply• Boiler Post Purge• DHW Boiler Reset Override• DHW Condensing Boiler• DHW External Demand

• DHW Post Purge• DHW Priority• DHW Setback• PID Staging• Equal Run Time Rotation• Lo / Hi Fire Boiler Rotation• Fixed Lead• Fixed Last• Fire Delay• Boiler Mass• Setpoint Boiler Reset Override• Setpoint Priority

115 V (ac)

24 V (ac)

CombustionAir Damper (C1)

Boiler Control 264Four Stage Boiler & DHW / Setpoint

Menu Item

Boiler Demand

DHW/Setpoint Demand

WWSD

Priority Override

D1

© 2003 A 264 - 10/03 2 of 12

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nce

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ed to

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scrib

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rtic

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sys

tem

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o de

term

ine

the

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mpo

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s fo

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nfig

urat

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part

icul

ar s

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m b

eing

des

igne

d, i

nclu

ding

add

ition

al e

quip

men

t, is

olat

ion

rela

ys (

for

load

s gr

eate

r th

an t

he c

ontr

ol’s

spe

cifie

d ou

tput

rat

ings

), a

nd a

ny

safe

ty d

evic

es w

hich

in th

e ju

dgem

ent o

f the

des

igne

r ar

e ap

prop

riate

, in

orde

r to

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perly

siz

e, c

onfig

ure

and

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gn t

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syst

em a

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o en

sure

com

plia

nce

with

bui

ldin

g an

d sa

fety

cod

e re

quire

men

ts.

tekm

ar C

ontr

ol S

yste

ms

Ltd.

, Can

ada;

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ar C

ontr

ol S

yste

ms,

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, U.S

.A.;

ww

w.t

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arco

ntr

ols

.co

mH

ead

Off

ice:

510

0 S

ilver

Sta

r R

oad

, Ver

no

n, B

.C. C

anad

a, V

1B 3

K4;

(25

0) 5

45-7

749

Fax

(25

0) 5

45-0

650

- A

pp

licat

ion

Mec

han

ical

Sys

tem

Op

erat

ion

The

Boi

ler C

ontr

ol 2

64 p

rovi

des

outd

oor r

eset

to a

spa

ce h

eatin

g sy

stem

. The

boi

lers

are

pip

ed in

reve

rse

retu

rn. T

he 2

64

has

an a

larm

con

tact

that

clo

ses

durin

g an

err

or m

essa

ge.

A1

= A

larm

D1

= E

xter

nal B

oile

r D

eman

dP

1 =

Pri

mar

y S

yste

m P

ump

S1

= B

oile

r S

uppl

y S

enso

r 07

1S

2 =

Boi

ler

Ret

urn

Sen

sor

071

S3

= O

utdo

or S

enso

r 07

0

A 2

64-1

10/0

3

Out

door

Sen

sor

(S3)

070

115

V (

ac)

24 V

(ac

)

Cla

ss II

Tran

sfor

mer

264

P1

D1

Boi

ler

Sup

ply

Sen

sor

(S1)

071

Boi

ler

Ret

urn

Sen

sor

(S2)

071

Ala

rm (

A1)

3 of 12 © 2003 A 264 - 10/03

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nce

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scrib

e a

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plet

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stem

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sys

tem

. It

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sys

tem

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sign

er t

o de

term

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ssar

y co

mpo

nent

s fo

r an

d co

nfig

urat

ion

of t

he

part

icul

ar s

yste

m b

eing

des

igne

d, i

nclu

ding

add

ition

al e

quip

men

t, is

olat

ion

rela

ys (

for

load

s gr

eate

r th

an t

he c

ontr

ol’s

spe

cifie

d ou

tput

rat

ings

), a

nd a

ny

safe

ty d

evic

es w

hich

in th

e ju

dgem

ent o

f the

des

igne

r ar

e ap

prop

riate

, in

orde

r to

pro

perly

siz

e, c

onfig

ure

and

desi

gn t

hat

syst

em a

nd t

o en

sure

com

plia

nce

with

bui

ldin

g an

d sa

fety

cod

e re

quire

men

ts.

tekm

ar C

ontr

ol S

yste

ms

Ltd.

, Can

ada;

tekm

ar C

ontr

ol S

yste

ms,

Inc.

, U.S

.A.;

ww

w.t

ekm

arco

ntr

ols

.co

mH

ead

Off

ice:

510

0 S

ilver

Sta

r R

oad

, Ver

no

n, B

.C. C

anad

a, V

1B 3

K4;

(25

0) 5

45-7

749

Fax

(25

0) 5

45-0

650

- A

pp

licat

ion

Ele

ctri

cal

requ

ired

optio

nal

Ess

enti

al C

on

tro

l Set

tin

gs

MO

DE

= 3

A 2

64-1

10/0

3

A1

= A

larm

D1

= E

xter

nal B

oile

r D

eman

dP

1 =

Pri

mar

y S

yste

m P

ump

S1

= B

oile

r S

uppl

y S

enso

r 07

1S

2 =

Boi

ler

Ret

urn

Sen

sor

071

S3

= O

utdo

or S

enso

r 07

0

C24

V (

ac)

R

N11

5 V

(ac

)

Cla

ss II

Tran

sfor

mer

L

P1

A1

Do

no

t ap

ply

po

wer

1 Com

2 Boil

Sup

3 Boil

Ret

4 Out

5 UnO Sw

6 Boil

Dem

7 Com

Dem

8Se

tp/

DH

W

9 Powe

rN

LPr

im P1

12 C.A

./Al

arm

Pmp/

Vlv

1314 R

elay

1

1510

11

1

16 Rel

ay2

17 2

18 Rel

ay3

19 3

20 Rel

ay4

21 4

22 DH

W23

264

5A5A

5A5A

5A5A

5A

S1 S2 S

3

D1

Boi

ler

#1Lo

Hi

Boi

ler

#2Lo

Hi

© 2003 A 264 - 10/03 4 of 12

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nce

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win

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scrib

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plet

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stem

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rtic

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sys

tem

. It

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p to

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tem

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sign

er t

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term

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the

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ssar

y co

mpo

nent

s fo

r an

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nfig

urat

ion

of t

he

part

icul

ar s

yste

m b

eing

des

igne

d, i

nclu

ding

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ition

al e

quip

men

t, is

olat

ion

rela

ys (

for

load

s gr

eate

r th

an t

he c

ontr

ol’s

spe

cifie

d ou

tput

rat

ings

), a

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ny

safe

ty d

evic

es w

hich

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e ju

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ent o

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des

igne

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e ap

prop

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, in

orde

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perly

siz

e, c

onfig

ure

and

desi

gn t

hat

syst

em a

nd t

o en

sure

com

plia

nce

with

bui

ldin

g an

d sa

fety

cod

e re

quire

men

ts.

tekm

ar C

ontr

ol S

yste

ms

Ltd.

, Can

ada;

tekm

ar C

ontr

ol S

yste

ms,

Inc.

, U.S

.A.;

ww

w.t

ekm

arco

ntr

ols

.co

mH

ead

Off

ice:

510

0 S

ilver

Sta

r R

oad

, Ver

no

n, B

.C. C

anad

a, V

1B 3

K4;

(25

0) 5

45-7

749

Fax

(25

0) 5

45-0

650

- A

pp

licat

ion

Mec

han

ical

A 2

64-2

10/0

3

A1

= D

HW

Aqu

asta

tC

1 =

Com

bust

ion

Air

Dam

per

D1

= E

xter

nal B

oile

r D

eman

dP

1 =

Pri

mar

y S

yste

m P

ump

P2,

P3

= B

oile

r P

ump

P4

= D

HW

Pum

pS

1 =

Boi

ler

Sup

ply

Sen

sor

071

S2

= B

oile

r R

etur

n S

enso

r 07

1S

3 =

Out

door

Sen

sor

070

Sys

tem

Op

erat

ion

The

Boi

ler

Con

trol

264

pro

vide

s ou

tdoo

r re

set t

o a

spac

e he

atin

g sy

stem

and

dom

estic

hot

wat

er e

xcha

nge

tem

pera

ture

fo

r an

indi

rect

dom

estic

hot

wat

er ta

nk. T

he 2

64 p

rovi

des

stag

ing

and

rota

tion

for

two

sing

le s

tage

boi

lers

. The

boi

lers

are

pi

ped

in p

aral

lel p

rimar

y-se

cond

ary

to th

e he

atin

g lo

ad. T

he in

divi

dual

boi

ler

pum

ps a

re c

ontr

olle

d by

the

264

to a

llow

for

post

pur

ging

of

the

boile

rs a

fter

they

hav

e sh

ut o

ff. T

he in

dire

ct d

omes

tic h

ot w

ater

tan

k is

pip

ed in

par

alle

l to

the

spac

e he

atin

g lo

ad. T

he 2

64 o

pens

a c

ombu

stio

n ai

r da

mpe

r be

fore

the

first

boi

ler

fires

.

P3

P2

MC

ombu

stio

nA

ir D

ampe

r (C

1)

264

P1

A1

P4

DH

WTa

nk

Boi

ler

Sup

ply

Sen

sor

(S1)

071

Boi

ler

Ret

urn

Sen

sor

(S2)

071

115

V (

ac)

24 V

(ac

)

Cla

ss II

Tran

sfor

mer

D1

Out

door

Sen

sor

(S3)

070

5 of 12 © 2003 A 264 - 10/03

Co

nce

pt

Dra

win

gT

his

is o

nly

a co

ncep

t dra

win

g, n

ot a

n en

gine

ered

dra

win

g. It

is n

ot in

tend

ed to

de

scrib

e a

com

plet

e sy

stem

, no

r an

y pa

rtic

ular

sys

tem

. It

is u

p to

the

sys

tem

de

sign

er t

o de

term

ine

the

nece

ssar

y co

mpo

nent

s fo

r an

d co

nfig

urat

ion

of t

he

part

icul

ar s

yste

m b

eing

des

igne

d, i

nclu

ding

add

ition

al e

quip

men

t, is

olat

ion

rela

ys (

for

load

s gr

eate

r th

an t

he c

ontr

ol’s

spe

cifie

d ou

tput

rat

ings

), a

nd a

ny

safe

ty d

evic

es w

hich

in th

e ju

dgem

ent o

f the

des

igne

r ar

e ap

prop

riate

, in

orde

r to

pro

perly

siz

e, c

onfig

ure

and

desi

gn t

hat

syst

em a

nd t

o en

sure

com

plia

nce

with

bui

ldin

g an

d sa

fety

cod

e re

quire

men

ts.

tekm

ar C

ontr

ol S

yste

ms

Ltd.

, Can

ada;

tekm

ar C

ontr

ol S

yste

ms,

Inc.

, U.S

.A.;

ww

w.t

ekm

arco

ntr

ols

.co

mH

ead

Off

ice:

510

0 S

ilver

Sta

r R

oad

, Ver

no

n, B

.C. C

anad

a, V

1B 3

K4;

(25

0) 5

45-7

749

Fax

(25

0) 5

45-0

650

- A

pp

licat

ion

Ele

ctri

cal

requ

ired

optio

nal

Ess

enti

al C

on

tro

l Set

tin

gs

MO

DE

= 2

DH

W M

OD

E =

1 (

no p

riorit

y)

2 (p

riorit

y)

A 2

64-2

10/0

3

A1

= D

HW

Aqu

asta

tC

1 =

Com

bust

ion

Air

Dam

per

D1

= E

xter

nal B

oile

r D

eman

dP

1 =

Pri

mar

y S

yste

m P

ump

P2,

P3

= B

oile

r P

ump

P4

= D

HW

Pum

pS

1 =

Boi

ler

Sup

ply

Sen

sor

071

S2

= B

oile

r R

etur

n S

enso

r 07

1S

3 =

Out

door

Sen

sor

070

C24

V (

ac)

R

N11

5 V

(ac

)

Cla

ss II

Tran

sfor

mer

L

P1

P2

C1

Do

no

t ap

ply

po

wer

1 Com

2 Boil

Sup

3 Boil

Ret

4 Out

5 UnO Sw

6 Boil

Dem

7 Com

Dem

8Se

tp/

DH

W

9 Powe

rN

LPr

im P1

12 C.A

./Al

arm

Pmp/

Vlv

1314 R

elay

1

1510

11

1

16 Rel

ay2

17 2

18 Rel

ay3

19 3

20 Rel

ay4

21 4

22 DH

W23

264

5A5A

5A5A

5A5A

5A

S1 S2 S

3

D1

A1

Boi

ler

#1B

oile

r#2

MP

3P

4

© 2003 A 264 - 10/03 6 of 12

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nce

pt

Dra

win

gT

his

is o

nly

a co

ncep

t dra

win

g, n

ot a

n en

gine

ered

dra

win

g. It

is n

ot in

tend

ed to

de

scrib

e a

com

plet

e sy

stem

, no

r an

y pa

rtic

ular

sys

tem

. It

is u

p to

the

sys

tem

de

sign

er t

o de

term

ine

the

nece

ssar

y co

mpo

nent

s fo

r an

d co

nfig

urat

ion

of t

he

part

icul

ar s

yste

m b

eing

des

igne

d, i

nclu

ding

add

ition

al e

quip

men

t, is

olat

ion

rela

ys (

for

load

s gr

eate

r th

an t

he c

ontr

ol’s

spe

cifie

d ou

tput

rat

ings

), a

nd a

ny

safe

ty d

evic

es w

hich

in th

e ju

dgem

ent o

f the

des

igne

r ar

e ap

prop

riate

, in

orde

r to

pro

perly

siz

e, c

onfig

ure

and

desi

gn t

hat

syst

em a

nd t

o en

sure

com

plia

nce

with

bui

ldin

g an

d sa

fety

cod

e re

quire

men

ts.

tekm

ar C

ontr

ol S

yste

ms

Ltd.

, Can

ada;

tekm

ar C

ontr

ol S

yste

ms,

Inc.

, U.S

.A.;

ww

w.t

ekm

arco

ntr

ols

.co

mH

ead

Off

ice:

510

0 S

ilver

Sta

r R

oad

, Ver

no

n, B

.C. C

anad

a, V

1B 3

K4;

(25

0) 5

45-7

749

Fax

(25

0) 5

45-0

650

- A

pp

licat

ion

Mec

han

ical

A 2

64-3

10/0

3

C1

= C

ombu

stio

n A

ir D

amp

erD

1 =

Ext

erna

l Boi

ler

Dem

and

P1

= P

rim

ary

Sys

tem

Pum

pP

2, P

3 =

Boi

ler

Pum

pR

1 =

Rel

ay 0

03S

1 =

Boi

ler

Sup

ply

Sen

sor

071

S2

= P

ool S

enso

r 07

1S

3 =

Out

door

Sen

sor

070

V1

= B

alan

cing

or

Glo

be

Val

ve

Sys

tem

Op

erat

ion

The

Boi

ler C

ontr

ol 2

64 p

rovi

des

outd

oor r

eset

to a

spa

ce h

eatin

g sy

stem

and

set

poin

t ope

ratio

n fo

r a p

ool o

r sim

ilar l

oad.

T

he 2

64 p

rovi

des

stag

ing

and

rota

tion

for t

wo

sing

le s

tage

boi

lers

. The

boi

lers

are

pip

ed p

aral

lel p

rimar

y-se

cond

ary

to th

e he

atin

g lo

ad a

nd th

e in

divi

dual

boi

ler

pum

ps a

re c

ontr

olle

d by

the

264

to a

llow

pos

t pur

ging

of t

he b

oile

rs a

fter

they

hav

e sh

ut o

ff. T

he s

etpo

int l

oad

is p

iped

in p

aral

lel w

ith th

e sp

ace

heat

ing

load

. The

264

clo

ses

a co

ntac

t to

open

a c

ombu

stio

n ai

r da

mpe

r be

fore

the

first

boi

ler

fires

.

P3

P2

MC

ombu

stio

nA

ir D

ampe

r (C

1)O

utdo

or S

enso

r(S

3) 0

70

150

115

V (

ac)

24 V

(ac

)

Cla

ss II

Tran

sfor

mer

P1

Boi

ler

Sup

ply

Sen

sor

(S1)

071

R1

Poo

l Sen

sor

(S2)

071

P4

V1

D1

264

7 of 12 © 2003 A 264 - 10/03

Co

nce

pt

Dra

win

gT

his

is o

nly

a co

ncep

t dra

win

g, n

ot a

n en

gine

ered

dra

win

g. It

is n

ot in

tend

ed to

de

scrib

e a

com

plet

e sy

stem

, no

r an

y pa

rtic

ular

sys

tem

. It

is u

p to

the

sys

tem

de

sign

er t

o de

term

ine

the

nece

ssar

y co

mpo

nent

s fo

r an

d co

nfig

urat

ion

of t

he

part

icul

ar s

yste

m b

eing

des

igne

d, i

nclu

ding

add

ition

al e

quip

men

t, is

olat

ion

rela

ys (

for

load

s gr

eate

r th

an t

he c

ontr

ol’s

spe

cifie

d ou

tput

rat

ings

), a

nd a

ny

safe

ty d

evic

es w

hich

in th

e ju

dgem

ent o

f the

des

igne

r ar

e ap

prop

riate

, in

orde

r to

pro

perly

siz

e, c

onfig

ure

and

desi

gn t

hat

syst

em a

nd t

o en

sure

com

plia

nce

with

bui

ldin

g an

d sa

fety

cod

e re

quire

men

ts.

tekm

ar C

ontr

ol S

yste

ms

Ltd.

, Can

ada;

tekm

ar C

ontr

ol S

yste

ms,

Inc.

, U.S

.A.;

ww

w.t

ekm

arco

ntr

ols

.co

mH

ead

Off

ice:

510

0 S

ilver

Sta

r R

oad

, Ver

no

n, B

.C. C

anad

a, V

1B 3

K4;

(25

0) 5

45-7

749

Fax

(25

0) 5

45-0

650

- A

pp

licat

ion

Ele

ctri

cal

requ

ired

optio

nal

Ess

enti

al C

on

tro

l Set

tin

gs

MO

DE

= 2

Set

poin

t MO

DE

= 1

(no

prio

rity)

2

(prio

rity)

A 2

64-3

10/0

3

C1

= C

ombu

stio

n A

ir D

amp

erD

1 =

Ext

erna

l Boi

ler

Dem

and

P1

= P

rim

ary

Sys

tem

Pum

pP

2, P

3 =

Boi

ler

Pum

pR

1 =

Rel

ay 0

03S

1 =

Boi

ler

Sup

ply

Sen

sor

071

S2

= P

ool S

enso

r 07

1S

3 =

Out

door

Sen

sor

070

S2

C24

V (

ac)

R

N11

5 V

(ac

)

Cla

ss II

Tran

sfor

mer

L

S1 S

3

P3

P1

P2

P4

R1

7 8 1 2

6 5 4 3

Do

no

t ap

ply

po

wer

1 Com

2 Boil

Sup

3 Boil

Ret

4 Out

5 UnO Sw

6 Boil

Dem

7 Com

Dem

8Se

tp/

DH

W

9 Powe

rN

LPr

im P1

12 C.A

./Al

arm

Pmp/

Vlv

1314 R

elay

1

1510

11

1

16 Rel

ay2

17 2

18 Rel

ay3

19 3

20 Rel

ay4

21 4

22 DH

W23

264

5A5A

5A5A

5A5A

5A

D1

Boi

ler

#1B

oile

r#2

M C1

C-

8A8A

No

Pow

er

R+

Com

N/O

N/C

12

34

56

7

Sens

orPo

wer

150

OnPWM

Off

© 2003 A 264 - 10/03 8 of 12

Co

nce

pt

Dra

win

gT

his

is o

nly

a co

ncep

t dra

win

g, n

ot a

n en

gine

ered

dra

win

g. It

is n

ot in

tend

ed to

de

scrib

e a

com

plet

e sy

stem

, no

r an

y pa

rtic

ular

sys

tem

. It

is u

p to

the

sys

tem

de

sign

er t

o de

term

ine

the

nece

ssar

y co

mpo

nent

s fo

r an

d co

nfig

urat

ion

of t

he

part

icul

ar s

yste

m b

eing

des

igne

d, i

nclu

ding

add

ition

al e

quip

men

t, is

olat

ion

rela

ys (

for

load

s gr

eate

r th

an t

he c

ontr

ol’s

spe

cifie

d ou

tput

rat

ings

), a

nd a

ny

safe

ty d

evic

es w

hich

in th

e ju

dgem

ent o

f the

des

igne

r ar

e ap

prop

riate

, in

orde

r to

pro

perly

siz

e, c

onfig

ure

and

desi

gn t

hat

syst

em a

nd t

o en

sure

com

plia

nce

with

bui

ldin

g an

d sa

fety

cod

e re

quire

men

ts.

tekm

ar C

ontr

ol S

yste

ms

Ltd.

, Can

ada;

tekm

ar C

ontr

ol S

yste

ms,

Inc.

, U.S

.A.;

ww

w.t

ekm

arco

ntr

ols

.co

mH

ead

Off

ice:

510

0 S

ilver

Sta

r R

oad

, Ver

no

n, B

.C. C

anad

a, V

1B 3

K4;

(25

0) 5

45-7

749

Fax

(25

0) 5

45-0

650

- A

pp

licat

ion

Mec

han

ical

A 2

64-4

10/0

3

A1

= D

HW

Aqu

asta

tA

2 =

Ala

rmP

1 =

Pri

mar

y S

yste

m P

ump

P2

= B

oile

r P

ump

P3

= D

HW

Pum

pS

1 =

Boi

ler

Sup

ply

Sen

sor

071

S2

= O

utdo

or S

enso

r 07

0R

1 =

Rel

ay 0

04V

1 =

Pre

ssur

e D

iffer

entia

l Byp

ass

Val

veZ

1...Z

3 =

Zon

e V

alve

Sys

tem

Op

erat

ion

The

Boi

ler

Con

trol

264

pro

vide

s ou

tdoo

r re

set t

o a

spac

e he

atin

g sy

stem

and

dom

estic

hot

wat

er e

xcha

nge

tem

pera

ture

fo

r an

indi

rect

dom

estic

hot

wat

er t

ank.

The

264

pro

vide

s st

agin

g fo

r a

sing

le t

hree

-sta

ge b

oile

r. T

he b

oile

r is

pip

ed in

pr

imar

y-se

cond

ary

to t

he s

pace

hea

ting

load

. T

he b

oile

r pu

mp

is c

ontr

olle

d by

the

264

to

allo

w f

or p

ost

purg

ing

of t

he

boile

r af

ter

it ha

s sh

ut o

ff. T

he d

omes

tic h

ot w

ater

load

is p

iped

in p

rimar

y-se

cond

ary

to th

e sp

ace

heat

ing

load

. The

264

ha

s an

ala

rm c

onta

ct th

at c

lose

s du

ring

an e

rror

mes

sage

.

Out

door

Sen

sor

(S2)

070

115

V (

ac)

24 V

(ac

)

Cla

ss II

Tran

sfor

mer

264 R

1

Z1

Z2

tekm

ar 5

00 s

erie

s th

erm

osta

ts

MM

Z3

V1

M

Boi

ler

Sup

ply

Sen

sor

(S1)

071

Ala

rm (

A2)

P2

P1

DH

WTa

nkP

3

A1

∆P

9 of 12 © 2003 A 264 - 10/03

Co

nce

pt

Dra

win

gT

his

is o

nly

a co

ncep

t dra

win

g, n

ot a

n en

gine

ered

dra

win

g. It

is n

ot in

tend

ed to

de

scrib

e a

com

plet

e sy

stem

, no

r an

y pa

rtic

ular

sys

tem

. It

is u

p to

the

sys

tem

de

sign

er t

o de

term

ine

the

nece

ssar

y co

mpo

nent

s fo

r an

d co

nfig

urat

ion

of t

he

part

icul

ar s

yste

m b

eing

des

igne

d, i

nclu

ding

add

ition

al e

quip

men

t, is

olat

ion

rela

ys (

for

load

s gr

eate

r th

an t

he c

ontr

ol’s

spe

cifie

d ou

tput

rat

ings

), a

nd a

ny

safe

ty d

evic

es w

hich

in th

e ju

dgem

ent o

f the

des

igne

r ar

e ap

prop

riate

, in

orde

r to

pro

perly

siz

e, c

onfig

ure

and

desi

gn t

hat

syst

em a

nd t

o en

sure

com

plia

nce

with

bui

ldin

g an

d sa

fety

cod

e re

quire

men

ts.

tekm

ar C

ontr

ol S

yste

ms

Ltd.

, Can

ada;

tekm

ar C

ontr

ol S

yste

ms,

Inc.

, U.S

.A.;

ww

w.t

ekm

arco

ntr

ols

.co

mH

ead

Off

ice:

510

0 S

ilver

Sta

r R

oad

, Ver

no

n, B

.C. C

anad

a, V

1B 3

K4;

(25

0) 5

45-7

749

Fax

(25

0) 5

45-0

650

- A

pp

licat

ion

Ele

ctri

cal

requ

ired

optio

nal

A 2

64-4

10/0

3

Ess

enti

al C

on

tro

l Set

tin

gs

MO

DE

= 4

DH

W M

OD

E =

4 (

with

prio

rity)

A1

= D

HW

Aqu

asta

tA

2 =

Ala

rmP

1 =

Pri

mar

y S

yste

m P

ump

P2

= B

oile

r P

ump

P3

= D

HW

Pum

pS

1 =

Boi

ler

Sup

ply

Sen

sor

071

S2

= O

utdo

or S

enso

r 07

0R

1 =

Rel

ay 0

04Z

1...Z

3 =

Zon

e V

alve

C24

V (

ac)

R

N11

5 V

(ac

)

Cla

ss II

Tran

sfor

mer

L

A1

R1

P1

P2

P3

Z1

M

R

tekm

ar 5

00 S

erie

sTh

erm

osta

ts

CR

elay

1R

tekm

ar 5

00 S

erie

sTh

erm

osta

ts

CR

elay

1

Z2

M

R

tekm

ar 5

00 S

erie

sTh

erm

osta

ts

CR

elay

1

Z3

M

2 1 8 7

3 4 5 6

A2

S1 S

2

Do

no

t ap

ply

po

wer

1 Com

2 Boil

Sup

3 Boil

Ret

4 Out

5 UnO Sw

6 Boil

Dem

7 Com

Dem

8Se

tp/

DH

W

9 Powe

rN

LPr

im P1

12 C.A

./Al

arm

Pmp/

Vlv

1314 R

elay

1

1510

11

1

16 Rel

ay2

17 2

18 Rel

ay3

19 3

20 Rel

ay4

21 4

22 DH

W23

264

5A5A

5A5A

5A5A

5A

Thr

ee S

tage

Boi

ler

LoM

edH

i

© 2003 A 264 - 10/03 10 of 12

Co

nce

pt

Dra

win

gT

his

is o

nly

a co

ncep

t dra

win

g, n

ot a

n en

gine

ered

dra

win

g. It

is n

ot in

tend

ed to

de

scrib

e a

com

plet

e sy

stem

, no

r an

y pa

rtic

ular

sys

tem

. It

is u

p to

the

sys

tem

de

sign

er t

o de

term

ine

the

nece

ssar

y co

mpo

nent

s fo

r an

d co

nfig

urat

ion

of t

he

part

icul

ar s

yste

m b

eing

des

igne

d, i

nclu

ding

add

ition

al e

quip

men

t, is

olat

ion

rela

ys (

for

load

s gr

eate

r th

an t

he c

ontr

ol’s

spe

cifie

d ou

tput

rat

ings

), a

nd a

ny

safe

ty d

evic

es w

hich

in th

e ju

dgem

ent o

f the

des

igne

r ar

e ap

prop

riate

, in

orde

r to

pro

perly

siz

e, c

onfig

ure

and

desi

gn t

hat

syst

em a

nd t

o en

sure

com

plia

nce

with

bui

ldin

g an

d sa

fety

cod

e re

quire

men

ts.

tekm

ar C

ontr

ol S

yste

ms

Ltd.

, Can

ada;

tekm

ar C

ontr

ol S

yste

ms,

Inc.

, U.S

.A.;

ww

w.t

ekm

arco

ntr

ols

.co

mH

ead

Off

ice:

510

0 S

ilver

Sta

r R

oad

, Ver

no

n, B

.C. C

anad

a, V

1B 3

K4;

(25

0) 5

45-7

749

Fax

(25

0) 5

45-0

650

- A

pp

licat

ion

Mec

han

ical

A 2

64-5

10/0

3

A1

= D

HW

Aqu

asta

tA

2 =

Ala

rmP

1 =

Pri

mar

y S

yste

m P

ump

S1

= B

oile

r S

uppl

y S

enso

r 07

1S

2 =

Out

door

Sen

sor

070

Sys

tem

Op

erat

ion

The

Boi

ler

Con

trol

264

pro

vide

s do

mes

tic h

ot w

ater

ope

ratio

n to

a s

ingl

e in

dire

ct d

omes

tic h

ot w

ater

tan

k. T

he 2

64

prov

ides

sta

ging

and

rot

atio

n to

four

sin

gle

stag

e bo

ilers

. The

boi

lers

are

pip

ed in

rev

erse

ret

urn

with

a s

ingl

e pu

mp.

The

26

4 ha

s an

ala

rm c

onta

ct th

at c

lose

s du

ring

an e

rror

mes

sage

.

Out

door

Sen

sor

(S2)

070

115

V (

ac)

24 V

(ac

)

Cla

ss II

Tran

sfor

mer

P1

A1

264

Boi

ler

Sup

ply

Sen

sor

(S1)

071

Ala

rm (

A2)

11 of 12 © 2003 A 264 - 10/03

Co

nce

pt

Dra

win

gT

his

is o

nly

a co

ncep

t dra

win

g, n

ot a

n en

gine

ered

dra

win

g. It

is n

ot in

tend

ed to

de

scrib

e a

com

plet

e sy

stem

, no

r an

y pa

rtic

ular

sys

tem

. It

is u

p to

the

sys

tem

de

sign

er t

o de

term

ine

the

nece

ssar

y co

mpo

nent

s fo

r an

d co

nfig

urat

ion

of t

he

part

icul

ar s

yste

m b

eing

des

igne

d, i

nclu

ding

add

ition

al e

quip

men

t, is

olat

ion

rela

ys (

for

load

s gr

eate

r th

an t

he c

ontr

ol’s

spe

cifie

d ou

tput

rat

ings

), a

nd a

ny

safe

ty d

evic

es w

hich

in th

e ju

dgem

ent o

f the

des

igne

r ar

e ap

prop

riate

, in

orde

r to

pro

perly

siz

e, c

onfig

ure

and

desi

gn t

hat

syst

em a

nd t

o en

sure

com

plia

nce

with

bui

ldin

g an

d sa

fety

cod

e re

quire

men

ts.

tekm

ar C

ontr

ol S

yste

ms

Ltd.

, Can

ada;

tekm

ar C

ontr

ol S

yste

ms,

Inc.

, U.S

.A.;

ww

w.t

ekm

arco

ntr

ols

.co

mH

ead

Off

ice:

510

0 S

ilver

Sta

r R

oad

, Ver

no

n, B

.C. C

anad

a, V

1B 3

K4;

(25

0) 5

45-7

749

Fax

(25

0) 5

45-0

650

- A

pp

licat

ion

Ele

ctri

cal

requ

ired

optio

nal

Ess

enti

al C

on

tro

l Set

tin

gs

MO

DE

= 1

DH

W M

OD

E =

1

A 2

64-5

10/0

3

A1

= D

HW

Aqu

asta

tA

2 =

Ala

rmP

1 =

Pri

mar

y S

yste

m P

ump

S1

= B

oile

r S

uppl

y S

enso

r 07

1S

2 =

Out

door

Sen

sor

070

C24

V (

ac)

R

N11

5 V

(ac

)

Cla

ss II

Tran

sfor

mer

L

S1 S

2

P1

A1

Boi

ler

#3B

oile

r#4

Boi

ler

#1B

oile

r#2

Do

no

t ap

ply

po

wer

1 Com

2 Boil

Sup

3 Boil

Ret

4 Out

5 UnO Sw

6 Boil

Dem

7 Com

Dem

8Se

tp/

DH

W

9 Powe

rN

LPr

im P1

12 C.A

./Al

arm

Pmp/

Vlv

1314 R

elay

1

1510

11

1

16 Rel

ay2

17 2

18 Rel

ay3

19 3

20 Rel

ay4

21 4

22 DH

W23

264

5A5A

5A5A

5A5A

5A

A2

Product design, software and literature are Copyright © 2003 by:tekmar Control Systems Ltd. and tekmar Control Systems, Inc.

All specifications are subject to change without notice.Printed in Canada. A 264 - 10/03.

12 of 12

Specifi cations

tekmar Control Systems Ltd., Canadatekmar Control Systems, Inc., U.S.A.Head Office: 5100 Silver Star RoadVernon, B.C. Canada V1B 3K4(250) 545-7749 Fax. (250) 545-0650Web Site: www.tekmarcontrols.com

The following are the recommended specifications for the Boiler Control 264

• The control shall be able to operate boilers that have one, two, three or four independent on / off stages.

• The control shall have the ability to calculate the boilers’ target temperature based on outdoor reset.

• The control shall have the ability to have the boilers’ target temperature set using an adjustable setpoint.

• The control shall have an adjustable warm weather shut down. The warm weather shut down only applies to outdoor reset operation.

• The control shall have a primary pump contact that operates during a call for space heating.

• The control shall have the ability to operate a domestic hot water contact that operates during a domestic hot water call.

• The control shall have the ability to limit the number of boilers operated during domestic hot water calls for heat.

• The control shall have the ability to display the current temperature difference between the return temperature and the supply temperature, ∆T.

• The control shall have an option to rotate the firing sequence of the boilers and the option for rotating the boiler firing sequence shall be based on the boilers’ accumulated running hours.

• The control shall use proportional, integral and derivative (PID) logic when staging boiler stages.

• The control shall have an adjustable Minimum Supply water temperature setting to help prevent condensation of flue gases and subsequent corrosion and blockage of the boilers’ heat exchanger and chimney.

• The control shall have the option of an automatic differential calculation in order to prevent short cycling of the stages.

• The control shall have the ability to operate a primary pump plus individual boiler pumps based on the mode of operation selected.

• The boiler pumps shall have an adjustable post purge setting that allows the pump to run for a set period of time after the boiler has been shut off.

• The control shall have the option of staging multistage boilers in either a Low – High sequence or a Low – Low sequence.

• The control shall have the option for a fixed lead rotation and when this option is selected, the control shall have an option for either a first on / first off, or first on / last off firing sequence.

• The control shall have the option for a fixed last rotation.

• The control shall have the option for either an alarm output or a combustion air damper output. If the combustion air damper output is selected, the control shall have an adjustable combustion air damper opening time.

• The control shall have an adjustable minimum inter-stage delay that can be set manually or calculated automatically by the control.

• The control shall have two separate lockable access levels to limit the number of adjustments available to various users.

• The control shall have a test button that activates a pre-programmed test sequence testing all the control’s outputs.

• The control shall show a number of current sensor temperatures depending on the access level that has been selected.

• The control shall continually monitor its temperature sensors and provide an error message upon a control or sensor failure.

• The control shall record and display the running hours of each boiler.

• During extended periods of inactivity, the pumps or valves that are operated by the control shall be periodically exercised to prevent seizure during long idle periods.