Install Instructions

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IM-PR 566442 1114 (Design Manual)

(CSA B214 Clause 12.1.2)

Radiant oor heating panels shall be protected

with a high-limit control set 11°C (20°F) above

the maximum design water temperature for the

panel to stop the introduction of heat into the

panel. The high-limit setting shall not exceed

the temperature rating for the pipe.

1.12.1 Fixed temperature

A fixed temperature control is the most simplistic

but also the least precise. This temperature control

method provides one set water temperature to

the system at all times, and can be achieved by

setting the heat source to a fixed temperature

or by using a thermostatic device to maintain a

fixed temperature based upon incoming water

temperatures. This control method is typically

used in an effort to reduce first costs of controls

by eliminating actuators, reset controls, etc.

To prevent overheating, it is normally used in

conjunction with a device that reduces or stops

flow when the space is satisfied.

• Thermostatic mixing valve – Water

temperature on the outlet of a thermostatic

mixing valve is regulated by a built-in, non-

electric temperature control. The non-electric

control is set to the desired temperature

and adjusts the amount of hot supply or

cold return water that flows through the

valve in order to maintain the desired supply

temperature to the panel. See Figure 1-33.

Figure 1-33 Thermostatic mixing valve to provide

fixed supply temperature to manifold

Figure 1-34 Dedicated heat source to provide

fixed supply temperature to manifold. Check with

manufacturer and local code to ensure application

is acceptable. Note that expansion tank, trim, etc,

have been omitted for clarity

• Dedicated heat source – With this

configuration, the heat source is programmed

to output a fixed supply temperature, which

it achieves through its internal sensors

and controls that vary the amount of

energy consumed (fossil fuel, electricity,

etc.). Modulating-condensing boilers and

ground source heat pumps are ideal for this

configuration. If a cast iron boiler is specified,

ensure that boiler protection is provided to

avoid low return temperatures that could

result in condensation of flue gases and

damage to the unit.

1.12.2 Radiant ﬂoor heating panels