SQ-Elite-MV & SQ-Elite-EXT Installation Manual
37
Mul
tIple 2-st
age BoIlers wItH HIgH
and low teMpera
ture zone
and dHw prIorIty
Shield
SEQ System Sensor
Shutdown
Dry Contact
Boiler1
Lo
L
N
Boiler2
Lo
Boiler3
Lo
L
N
Stage F
DHW Call
Dry Contact
SEQ Pump
MOV Pump
DHW Pump
Shield
Outdoor Sensor
Shield
Return Sensor
Shield
MOV System Sensor
Open
Close
Com
24VAC
Transformer
Motorized
V
alve
Boiler1
Hi
Boiler2
Hi
Boiler3
Hi
Flow Switch
Dry Contact
Outdoor Sensor
DHW
Indirect
Boiler 1
Boiler 2
Boiler 3
MOV
MOV Pump
DHW Pump
SEQ Pump
Hi
T
emp
Zones
Lo
T
emp
Zones
SEQ Sys
MOV Sys
Flow Switch
Return T
emp
SQ-Elite-MV
SQ-Elite-MV
SEQUENCING CONTROL
INPUT RATINGS:
115VAC 60Hz, 12VA MAX
Use Copper Conductors Only.
CAUTION:
Risk of Electric Shock.
Stage E
Stage F
Stage A
Stage B
Stage C
Stage D
PROGRAM
RUN
SEQ=
138
F MOV=
128
F
OD=40F
RTN=122F
SEQ TGT =140F MOV TGT =130F <AB
>
CD
EF
HI
LO
--
L
N
1
2
MOV
SYS
3
MOV
CLOSE
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
4
SEQ
SYS
19
DHW
PUMP
21
27
29
31
MOV
T
emp
33
SHUTDOWN
/TSTAT
/SETBACK
35
Return
T
emp
20
22
28
30
32
34
36
25
26
DHW
37
38
SEQ
PR
OVE
/MOV
TSTAT
23
24
MOV
OPEN
SEQ
Temp
Outdoor
Temp
MOV CLOSE
SEQ SYS
DHW PUMP
MOV OPEN
SEQ SYS
SENSORS MUST BE GOLD SERIES
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
Use Copper Conductors Only.
CAUTION:
Risk of Electric Shock.
PROGRAM
RUN
L
N
1
2
MOV
SYS
3
MOV
CLOSE
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
4
SEQ
SYS
19
DHW
PUMP
21
27
29
31
MOV
Temp
33
SHUTDOWN
/TSTAT
/SETBACK
35
Return
Temp
20
22
28
30
32
34
36
25
26
DHW
37
38
SEQ PROVE
/MOV TSTAT
23
24
MOV
OPEN
SEQ
Temp
Outdoor
Temp
SENSORS MUST BE GOLD SERIES
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
•
The SQ-Elite-MV sequencing 3 2-stage boilers piped in Reverse Return. DHW is piped in parallel t
o boilers' loop. 4 high temperature zones are provided before connecting to the low temperature
zone controlled by the 3-way motorized valve.
The SQ-Elite-MV controls the boilers, the boiler loop pump (SEQ Pump), DHW Pump, the Motorized valve, and the low temperature loop pump
(MOV Pump).
•
Heat-T
imer Corp. is aware that each installation is unique.
Thus, Heat-T
imer Corp. is not respon
sible for any installation related to any electrical or mechanical diagram generated by Heat-T
imer
Corp..
The provided illustrations are to demonstrate Heat-T
imer Corp.’
s control operating concept only
.
Mechanical
electrical
