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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
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
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
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
= 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
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
64-2
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
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
64-3
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.