Theory of Operation
The CXRC1 monitors the indoor dew point and compares it to the water temperature
entering the supply manifold.
There is a cross-connect between the supply and return lines, and a motorized 3-way
mixing valve that can mix water returning from the radiant system back into the supply,
before entering the supply manifold, to quickly raise the temperature as needed to
adjust the water temperature so that it will be above the dew point or above a pre-set
delta to the dew point. This helps ensure that water entering the radiant system is at a
temperature that will not produce condensation.
Application Notes:
The CXRC1 is not a radiant controller, it is an add-on to most any Brand or model
standard radiant controller, to allow you to operate a radiant heating system In a cooling
mode without condensation issues.
BEFORE ORDERING OR INSTALLING THE CXRC1
, PLEASE CONSULT WITH CHILTRIX
TECHNICAL SUPPORT DEPT. TO VERIFY THAT YOUR RADIANT CONTROLLER IS
COMPATIBLE. YOU WILL NEED TO PROVIDE THE MAKE AND MODEL, AND A PDF
MANUAL OR A LINK TO THE MANUAL ONLINE FOR YOUR RADIANT CONTROLLER.
The radiant controller will need to have one or more thermostats that have the
capability of cooling function. You may need to replace or add to your current
thermostats.
2. This radiant cooling controller is designed to monitor indoor dew points and adjust the
temperature of the water (or water/glycol) entering the radiant system such that the
radiant surfaces do not drop below the dew point. This can prevent condensation
(accidental dehumidification) which could cause water damage or inconvenience.
3. The system is ordered as follows: CXRC1-4 has 4x RJ45 Ethernet ports, can connect to
one to four dew point sensors. CXRC1-8 has 8x RJ45 Ethernet ports, can connect to one
to eight dew point sensors. DPX1 Dew Point Sensors are ordered separately.
4. All dew point sensors connect to the CXRC1 via CAT6 cable (supplied by installer). Up
to 150 ft. cabling distance is allowed per sensor.
5. ASHRAE requires an indoor humidity </= 60% RH to prevent EMC, corrosion, or mold.
In some climates, you will need a dehumidifier to ensure this. A radiant cooling system
cannot and will not dehumidify.
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