Easy Radiant Works PPRTH-50-15 Installation & Operating Instructions Manual page 16

To allow heater expansion the gas supply must be installed using:
In the USA: a stainless steel flexible gas connector certified for use on an
infrared radiant tube heater (ANZI Z21.24 CSA 6.10)
In Canada: a Type 1 hose connector (CAN/CGA 8.1). Also the flue vent, and
combustion air intake (if used) must be installed in such a manner that the normal
expansion of the heater will be accommodated.
This heater will expand in length as it heats up. It is a normal condition that
during heat-up and cool-down a tube heater will expand and contract. Allowances for
heater expansion must be made in the gas connection, venting and combustion air
ducting. Improper installation, alteration, or adjustment can result in property
damage, injury or death.
The BTU input and the tube length determine the overall expansion that occurs.
A typical infrared tube installation will expand toward both the burner and the vent
end.
To allow heater expansion the gas supply must be installed using:
In the USA: a stainless steel flexible gas connector certified for use on an
infrared radiant tube heater (ANZI Z21.24 CSA 6.10)
In Canada: a Type 1 hose connector (CAN/CGA 8.1). Also the flue vent, and
combustion air intake (if used) must be installed in such a manner that the normal
expansion of the heater will be accommodated.
INDOOR INSTALLATIONS, VENTING OF PRODUCTS OF COMBUSTION
1. The tube system has been approved for vented and unvented applications. When
installed unvented indoors, it must be electrically interlocked to an exhaust fan with
an air proving switch. The exhaust fan must provide exhaust in the amount of 300
c.f.m. for every 100,000 BTU of input. When installed unvented provision must be
made to supply adequate combustion air from outside the space. Combustion air
openings must be in the amount of one square inch or more of free area for each
10,000 BTU.
When installed vented, installations must comply with all applicable codes.
When installed in an adequately ventilated agricultural building used only for
brooding purposes, the heater may be installed unvented and discharge the
products directly into the space without interlocking provided the maximum input
does not exceed 20 BTU per cubic foot, or the input specified by local codes. There
must be ventilation during the heating cycle.
2. All vent material shall meet C.G.A. approval standards and be a minimum of 4"
diameter.
WARNING
WARNING