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059705–00 REV. B
11
INSTALLATION
HEATING SYSTEM SENSOR (HSS) INSTALLATION
HEATING SYSTEM SENSOR HSS—
HYDRONIC HEATING
•
Install the Heating System sensor approximately 10’ feet past the boiler
on the supply header but before any major takeoffs.
•
The sensor must be located where it sees the output of the boiler.
•
Only use the temperature sensor with enclosure (HT #904220–00) provided
with the Genesis Heat-Timer
®
control.
•
The sensor wires can be extended up to 500’ using a shielded 2-conductor
cable (Belden #8760 or equivalent). Do not ground the shield at the sensor
but at the panel using one of the terminals marked with an “O”.
•
Do not run sensor wires in conduit with line voltage wiring.
•
Install a 3/8” ID 1/2” NPT immersion well (HT #904011–00 or equivalent).
•
Insert the sensor probe of the supplied sensor into the well.
HEATING SYSTEM SENSOR HSS—
STEAM HEATING
•
Only use the temperature sensor with enclosure (HT #904220–00)
provided with the Genesis Heat-Timer
®
control.
•
The ideal location for the heating system sensor is on the furthest
radiator in the system. This radiator is usually the hardest to heat.
•
The sensor may also be located on the furthest return riser.
However, the sensor MUST be above the boiler water line (on a
dry return).
See “Piping Diagrams” on page 72
•
Strap the heating system sensor to the pipe using the tie-wraps
provided with the sensor. Then wrap insulation around the sensor
and pipe to achieve the highest accuracy.
•
The sensor wires can be extended up to 500 feet
(152.4 meters) using shielded 2-conductor (#18/2) cable
(Heat Timer P/N 703001–01).
•
Do not ground the shield at the sensor but at the panel using one
of the terminals marked with an “O”.
ALERT
If the HSS can not sense the correct heating system water temperature being supplied to the building, the Genesis
Heat-Timer
®
will not provide comfortable heat levels. Be sure the HSS is located on a main supply pipe which can not
easily be isolated from the system.
Return Riser Pipe
Pipe Insulation
Sensor Probe
Shield
Connect to Control
CAUTION
Determining the proper location for the heating system sensor is very important. If the heating system sensor cannot
sense the system is full of steam, the Genesis Heat-Timer
®
will not provide comfortable heat levels. Be sure the heating
system sensor is located on a properly vented pipe that cannot easily be isolated from the system.
NEVER install the heating system sensor between the condensate receiver and the boiler.
Common Supply Pipe
Sensor Probe
Strap-On Heating System Sensor
Shield
Pipe Insulation
Connect
To control
System Sensor
In Well
Shield
Not connected
Well Locknut
Sensor
in Well
Well
Sensor 2-Conductor
Shielded Cable
System
Strap-On
Sensor
Shield
Not connected
Plastic
Tie-Wraps
Around Pipe
Strap-On Sensor
Immersion Sensor
Common Supply
Header Pipe
Heating System
Sensor Wiring
Shield Wire
Heating System
Sensor Probe
IMMERSION HEATING SYSTEM SENSOR
Immersion Well
3/8” ID 1/2” NPT