12
Heat-Timer Corp.
wIrIng tHe stages
(terMInals 3 to 14)
The SQ-Elite-MV can be configured to operate the stages of a heating boiler or multiple boilers.
Moreover, it can be configured to operate the boiler pumps or valves in addition to the stages.
• The N.O. contacts are dry-contacts only. They do not source any voltage.
• Wire the N.O. relay contacts in series with the boiler’s limit circuit on On/Off boilers. However, on
multi-stage boilers follow the burner manufacturer diagrams to wire the individual stages.
• No stage outputs will be activated until the
Prove
input is shorted. If a Prove is not required, the
factory-installed jumper should remain connected or the
Prove
terminal functionality should change.
• Class 1 voltage wiring must enter the enclosure through a different opening from any Class 2 voltage
wiring.
PWR
L N
1 2
3
5
Stage A
7
Stage B
9
Stage C
11
13
Stage E Stage F
Stage D
6
8
10
12
14
4
Lo Hi
Unit1
Stages
Lo Hi
Unit2
Stages
wIrIng tHe stage outputs
• Each Stage output (A through F) has one Normally Open (N.O.) relay contact.
• Wire the N.O. relay contacts in series with the boiler’s limit circuit on On/Off boilers. However, on
multi-stage boilers follow the burner manufacturer diagrams to wire the individual stages.
• When wiring several multi-stage boilers, start with the lower stage of the first boiler and wire it to
Output A, followed by the higher stage of the same boiler and wire it to Stage B.
wIrIng tHe puMp or ValVe outputs
• If the SQ-Elite-MV is configured to operate Stage Pumps or Valves (See Boiler Output menu under
19), then, wire them using the stage after the highest firing stage on that boiler.
That is, the low stage for the first boiler must be connected to A and the higher stage of the same
boiler must be connected to Stage B. The boiler valve or pump must be connected to Stage C.
PWR
L N
1 2
3
5
Stage A
7
Stage B
9
Stage C
11
13
Stage E
15
Stage F
Stage D
6
8
10
12
14
4
Lo Hi
Unit1
Stages
Unit1
Pump
Lo Hi
Unit2
Stages
Unit2
Pump
L
N
wIrIng tHe MotorIzed ValVe
(terMInals 21 to 24)
The SQ-Elite-MV has 2 S.P.S.T (single pole single throw) modulating output relays.
• The Motorized Valve
Open
and
Close
outputs are dry-contacts only. They do not source any power.
A separate power source must be used to provide the actuator with power.
• To ease the wiring, the power to the motorized valve can be switched using the
MOV Open
and
Close
relay
outputs. See diagram.
DHW
PUMP
13
Stage E
15
Stage F
17
12
14
16
18 19
21
20
22 23 24
MOV
OPEN
MOV
SYS
MOV
CLOSE
SEQ
SYS
Open
Close
Com
24VAC
Transformer
120VAC
Motorized Valve
connectIng to tHe sQ-elIte-eXt panels and 4-20Ma eMs Interface
• The SQ-Elite-MV is equipped with a 6-pin phone socket to connect to SQ-Elite-EXT Extension panels or 4-20mA EMS Interface.
• Only the 6-wire phone cable provided must be used for proper operation.
• Each SQ-Elite-EXT Extension has two RS485 communication ports. Use one to connect to the SQ-Elite. Use the other port to
connect to the second extension or 4-20mA EMS Interface.
• Additional compatible devices can utilize the second RS485 connection on the second SQ-Elite-EXT Extension. i.e. 4-20mA EMS
Interface (HT# 926741-00) to provide a 4-20mA set point signal to the SQ-Elite-MV (SEQ Set Point only). See SEQ Control
selectIng tHe sQ-elIte-eXt panel letter
• The SQ-Elite-MV is capable of communicating to two SQ-Elite-EXT Extensions.
To avoid having
communication problem
, each extension must be identified as either A or B using the switch on each
extension.
• Extension A (Switch is set to "A") will operate stages "G" through "N". While Extension B (Switch
is set to "B") will operate stages "O" through "V".
Ext A
Ext B
