34
Heat-Timer Corp.
059040-00 C
MultIple ModulatIng boIlers
external 4-20Ma set poInt usIng
4-20Ma eMs Interface
4-20 mA EMS
4-20mA INPUT
+
Signal GND
1
2
3
RS485
EXTENSION
CONNECTORS
4-20mA EMS Interface
To EMS/BMS
4-20mA Set Point
L
N
Sy
st
em P
ump
L
N
Mini-MOD
SYSTEM
A
B
C
D
Full Modulation Sequencing Control
1 2
RUN
PROGRAM
DO NOT APPLY ANY VOLTAGE
TO INPUT TERMINALS
3 4 5 6 7 8 9 10 11 12
13
15
14
17
16
18
22
20
19
21
24
23
29
25
27
26
28
32
30 31
L N
-
+
+
T
T
O
O
RS-485
mA
GND
VLT
SYS
A
B
C
D
PWR
CUR / VLT
A
-
+
+
mA
GND
VLT
-
+
+
mA
GND
VLT
-
+
+
mA
GND
VLT
+
mA
TEMP
OUTDOOR
O
O
TEMP
SYSTEM
EXTENSION
MODULE
CUR / VLT
B
CUR / VLT
C
CUR / VLT
D
---
---
PROVE
/DHW
SHUTDOWN
/SETBACK
FOR ALL CIRCUITS
120VAC, 6A RESISTIVE
OUTPUT RATINGS:
1A PILOT DUTY, 15A TOTAL
115VAC 60Hz , 30VA MAX
INPUT RATINGS:
USE COPPER WIRE,
CLASS 1 WIRE ONLY.
CAUTION
: RISK OF ELECTRIC SHOCK
More than one disconnect switch may be required
to de-energize the equipment before servicing.
/TSTAT
Boiler 1
Boiler 2
Boiler 3
Boiler 4
4 - 20 mA
Signal Outputs
Out
do
or S
ensor
Sy
st
em S
ensor
Pr
ov
e J
ump
er
D
o N
ot r
emo
ve
Shield
Shield
Boiler 1
Boiler 2
Boiler 3
Boiler 4
startup settIngs
Sensor Type = Set Point °F or Set Point °C
EMS Input Mode = Enable
Boost = Disable
