THE IPEX MANUAL OF THE IPEX MANUAL OF MODERN HYDRONICS The IPEX WarmRite Control Panel product line was developed using this process, in combination with valuable feedback from the North American market place. The result is the following eleven different Control Panels (CP) Injection Mixing CP Recirculating Zone CP Recirculating Zone CP with Expansion Tank CP with Heat Exchanger Floor Warming CP Multi Zone Manifold Station Manifold Station with Circulator Manifold Station Snowmelt / Industrial CP Injection Mixing Secondary CP Isolation Module Each control panel is described in this section. However, because the panels have numerous common elements, a review of their similarities is in order. For detailed information, application notes and installation / operation manuals are available for each panel.
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7-1.3 Operating Principles All panels are designed to control the average floor temperature required to compensate for ongoing heat loss. Each panel does this by cycling between heat input (on cycle) and no heat input (off cycle).
During the on cycle, additional heat is added to the pipe loops to bring the floor temperature to its desired level. Ryobi Rbc30sbt Service Manual. The ratio between the on and off cycle is proportional to the average heat needed in the floor.
Simply put, if it is warm outside the heat loss is low. The on cycle is short and the off cycle is long. If the opposite is true and it is cold outside, the heat loss will be high causing the on cycle to be long and the off cycle to be short. In principle, radiant floor systems are designed so that on the coldest day of the year, the on cycle will operate 100% of the time. 7-1.4 Supply Water Temperature Most panels operate on constant supply temperature. Only the Injection Mixing Control Panel modulateschanges continuously-the supply temperature based on outdoor reset.
The Control Panel with Heat Exchanger and the Floor Warming Control Panel have a built-in tempering valve to set the supply temperature. These three panels control the floor supply temperature so no external supply water temperature control is needed. All other panels rely on receiving the calculated design water temperature.
7-1.5 Space Temperature Control Most of the panels are primarily operated as a zone control mechanism. They can provide loop control if necessary, but one should always consider the way the building is used and clarify if zone control is appropriate, or if loop by loop control is needed. Loop by loop control always requires more hardware components than zone control. Designers should consider how the building is used.
Who is using it What comfort level is required How even and constant is the required indoor temperature What level of accuracy is required from the control system One must first identify what is really required and design accordingly. 7-1.6 Why zone control It is fair to say that the most fundamental requirement of every heating system is to provide constant temperature in the heated space.
There are exceptions of course, but mostly a set temperature is desired throughout the heating season. The opposite of this occurs if a building needs to be heated only for a short time, then cooled and heated again. In most cases, high mass radiant floor may not be the best option for this type of heating pattern. Where radiant heating thrives is in constant temperature environments.
This being the case, the fundamental requirement is to be able to set a desired temperature and allow the system to maintain it - this is what zone control does best. To clarify, zone control means that all pipe loops (or heat emitters) connected to a manifold are controlled by one thermostat or sensor.
However, this does not mean that the temperature must be the same in all areas covered by the loops from a single manifold. Different temperatures can be set within the zone by adjusting the balancing valve on each loop. Adjusting the flow rate loop results in different temperatures in the areas covered by the loops. 7-1.7 Setting the Temperature All panels have a balancing valve for each pipe loop fitted on the return manifold.
Most panels also have flow rate indicators on the return manifold. The desired temperature relationship can be set easily and with no additional hardware-i.e. A thermostat in every room and an actuator on every loop. This approach to temperature control works very well as long as the preference 74 SECTION 7 PRE-ASSEMBLED CONTROL PANELS is for a consistent temperature pattern which is not often altered. The temperature difference between the areas will remain the same unless the balancing valves are readjusted.
Naturally there are applications when the temperature setting has to be changed more frequently - such as a motel where guests change every day, and with them so do individual comfort requirements. Perhaps in our own home there is a guest bedroom that is only used sporadically.
In these cases, separate thermostats are required. The pipe loops serving these spaces will have valve actuators connected to the appropriate room thermostat. When the room is occupied and that thermostat calls for heat, valves open on those loops until the appropriate setting is satisfied. The provision for individual loop valves is available on all WarmRite Floor control panels designed for residential or office environments.
Industrial and Secondary Injection Mixing Control Panels differ from the others in that the environments they are designed for rarely require loop by loop control. In large areas, the flow adjustment in a single loop has virtually no effect on the overall heat output. There are no sophisticated balancing or actuated valves in these panels because they are not required. All of the other control panels have been designed to accommodate individual loop by loop control when required. Every panel designed for closed loop systems has an automatic air vent on the supply manifold and a fill/drain valve on both manifolds. Each is equipped with a pressure gauge on the return manifold and two temperature gauges: one for supply and one for return water temperature. The temperature drop in the system characterizes best how the unit is operating.
7-1.8 Protection from Overheating All panels - except the manifold station - are fitted with a limit thermostat to protect the floor from overheating. Floor surface temperature should be less than 85 deg. For human comfort. The limit thermostat monitors the supply water temperature which is proportional to the floor surface temperature.
If the supply temperature reaches the setpoint, the limit thermostat turns off the heat input. This is a factory setting based on typical concrete slab installations. When higher supply temperatures are required, it can be readjusted accordingly. See the Application Notes and Installation / Operation Manual supplied with each panel for more details.
User Manuals A user operation manual for home or building owners to learn about accessible product features and settings.