Sensor Installation & Wiring - Bosch Heatronic 4000 Installation & Operating Instructions Manual

Modulating Boiler Wiring
For modulating boilers that do not require an enable:
• The Heatronic 4000 provides either a 4-20 mA or a 0-10 V (dc) output to each boiler.
• Polarity is important.
• Connect the Mod + terminals from boilers 1, 2, 3 and 4 to the Heatronic 4000 terminals 51, 57, 63
and 69, respectively.
• Connect the Mod - terminals from boilers 1, 2, 3 and 4 to the Heatronic 4000 terminals 52, 58, 64
and 70, respectively.
Special Requirements : Some modulating boilers may also require an on / off signal in addition to
the modulating signal. See the Stage 1 terminals for boilers 1, 2, 3 and 4.
Modutrol IV ™ gas valve
The 4 to 20 mA output can be converted to a 0 - 135 Ω
output for a Modutrol IV™ gas valve actuating motor using
a 0 - 135 Ω tekmar Converter 005 (sold separately).
Modutr ol IV™
0 - 1 35
Act uat i ng
M ot or
Heatronic
+
Mod
4000
-
Modutrol IV™ and V9055™ are trademarks of Honeywell, Inc.
Sensor Installation & Wiring
Mounting the Outdoor Sensor -------------- ---- ------------- -- - - -- -- -- ---- --- -- -- --- -- -- -- --- ---- --- ------ - -- -- -- -- --
The temperature sensor (thermistor) is built into the sensor
enclosure.
• Remove cover by sliding upwards away from the base.
• The sensor can be mounted directly onto a wall and the wiring
should enter through the back or bottom of the enclosure. Do
not mount the sensor with the conduit knockout facing upwards
as rain could enter the enclosure & damage the sensor.
• In order to prevent heat transmitted through the wall from
affecting the sensor reading, it may be necessary to install
an insulating barrier behind the enclosure.
BTC461503101C | 6720810369 (2018/03)
Modutr ol IV V9055
B B
R R
W W
+ +
- -
t ekm ar t ekm ar
------------------- ----------- --- -- -- -- -- -- -- -- - -- -- -- -- -- -- -- -- -- -- -- -- -- - - -- -- -- -- -- --
Sensor with
wiring from back
V9055 ™ gas valve
The 4 to 20 mA output can be converted to a 0 - 135 Ω output
for a V9055™ gas valve actuating motor using a 0 - 135 Ω
tekmar Converter 005 (sold separately).
Modutr ol IV
B
R
W
+
-
t ekm ar
• The Outdoor Sensor should be mounted on a wall which
best represents the heat load on the building (a northern
wall for most buildings & a southern facing wall for buildings
with large south facing glass areas). The sensor should not
be exposed to heat sources such as ventilation or window
openings.
• The sensor should be installed at an elevation above the
ground that will prevent accidental damage or tampering.
Sensor with
wiring from
bottom
25 of 60
Terminals 51 to 72
51 52 53 54
Boi l er 1
+
Mod - Sta g e 1 Sta g e 2
+ - T
Mod Enable
V9055
V9055™
B
0 - 1
R
Act uat i ng
W
M ot or
+
-
t ekm ar
+
Mod
-
Heatronic 4000
55 56
T
35
Heatronic
4000