Chiltrix CXRC1 Manuel utilisateur
Table of Contents
Operation Overview ……………………………………………………………..3
Theory of Operation & Application Notes ………………………..…..4
Installation Overview …………………………..……………………………....5
Fittings & Components Installation ……………………………………….6
Piping & Wiring Diagrams ………………………………………………….....9
Sensors Installation……………………………………………………………….10
Sensor Location …………………………………………....……………………..12
Controller Operation …………………………………………………………....13
Condensation Safety & Alarm Output ……………………………...…15
Testing & Troubleshooting …………………………………………………..16
Determining Set Points / Calculators …………………………………. 17
Augmentation ……………………………………………………………………..22
2
CXRC1 Operation Overview
Radiant cooling is the most efficient and comfortable method of
cooling available for users is a dry or moderate climate and be highly
beneficial even in humid climates.
However, if a radiant surface is operated below the dew point,
unwanted condensation will be produced. A fast acting radiant
cooling controller designed to prevent this, such as CXRC1, is
required.
The CXRC1 is designed to be added to any existing radiant heating
controller to enable the additional function of radiant cooling. The
existing radiant controller will need to have thermostat(s) that are
capable of calling for cooling. These can be added to nearly any
controller.
Below is a logical topology of the CXRC1 radiant cooling controller:
3
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.
4
Installation Overview
1. READ THIS MANUAL IN IT’S ENTIRETY BEFORE PROCEDING.
2. Verify the thermostats used with the existing radiant heating
controller are capable of a cooling setting. If not, augment or
replace the thermostats. Consult with the radiant cooling controller
manual to see how to connect any new or additional thermostat or
call Chiltrix technical support for assistance. Radiant cooling control
can be configured to work with nearly all radiant controllers.
3. Install sensor well and PT100 sensor fitting.
4. Install the controller CXRC1.
5. Install supply-return cross connect and proportional mixing valve.
6. Install dew point sensors, run cabling, connect CAT6 cables to all
dew point sensors to the controller according to this manual.
7. Connect all wiring according to this manual.
8. Determine and install optional customer-provided alarm output
device.
9. Configure controller according to the Chiltrix radiant calculators
particularly using the “Surface temperature” tab.
10. Test system operation.
5
Installation of fittings
.
When installing any fittings, make sure that you use some type of
sealant on all threads. Regular Teflon tape will work fine for sealant.
The included sensor fitting is 1 ¼ “ FNPT, you can adapt to this as
needed for your PEX or copper fittings. The fittings on the included
3 way valve are 1”FNPT.
Above is an image of the sensor fitting, a Tee-adapter from 1 ¼” to
the ½”. This size fitting is used to create a near-0 pressure drop
sensor fitting for the PT100 sensor.
6
A properly installed PT100 sensor assembly
Three-way mixing valve
7
Installation of Mixing Valve
When installing the 3 way valve please use Teflon tape on the
fitting ports to prevent any water leakage. The 3 way valve must be
installed with the white actuator on top as shown below. Secure the
valve to a mounting board if it is directly connected to PEX tubing on
all ends. The orientation of the position of the valve (0 to 1) at time of
install does not matter, it will be addressed later in the manual.
IMPORTANT NOTE
The mixing valve, cross connect piping, and PT100, MUST all be on
the manifold supply line and MUST be “upstream” of the pump(s)
as shown in the various diagrams of this manual.
Above, valve supported by copper pipe on 2 sides
8
Example Piping Diagram
Wiring Diagram
9
Mounting of the Controller and Dew Point Sensors
Mount the controller in a interior location near the mixing valve and PT100 temperature
sensor fitting, and away from any exposure to water or dirt. Mounting tabs are located on
the control box on each side. This location may be near the buffer tank, or near the
manifolds.
NOTE: neither the controller or dew point sensors are water proof. It’s also recommended
to consider access to a wall outlet (110-120vac). The controller is powered by a 110-120
wall outlet plug.
Sensors
Mount each sensor in each area where you wish to monitor the dew point. The sensors
have mounting tabs on each side just like the control box. The wire connector can go in two
different ways. First method is to drill a hole in the wall and slide the connector through the
back of the sensor box, it is an oval shaped hole. The short end of the housing “vents” can
also be pushed out with your fingers to run the sensor wire through if you wanted to mount
the sensor on the celling or along side a wall. Note these vents are designed to
“breakaway” so they are relatively fragile. Be careful and don’t break them by accident.
10
Ce manuel convient aux modèles suivants
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