Reznor, Photon, Installation Manual, EN 2021-04, D301310 Iss 0 Page No 17 of 52
I
Gas connection
A competent and/or qualified engineer is
required to either install a new gas meter to the
service pipe or to check that the existing meter
is adequate to deal with the rate of gas supply
required. Installation pipes should be fitted in
accordance with national standards so that the
supply pressure, as stated in the technical data
section will be achieved.
It is the responsibility of the competent engineer
to ensure that other relevant standards and
codes of practice are complied with in the
country of installation. Pipes of smaller size
than the heater inlet gas connection must not
be used. The complete installation must be
tested for soundness as described in the country
of installation. Support gas piping with pipe
hangers, metal strapping, or other suitable
material.
Do not rely on the unit to support
the gas pipework installation.
Before installation, check that
the local distribution conditions,
nature of gas and pressure, and
adjustment of the appliance are
compatible.
This appliance is designed for a
maximum gas supply pressure of
50mbar. When pressure testing the
supply piping with test pressures
above 50mbar, disconnect the
heater and manual valve from the
gas supply line that is to be tested.
Cap or plug the supply line.
All sealing products must be resistant to the
action of liquefied petroleum gas or any other
chemical constituents of the gas being supplied.
Install a ground joint union and manual shut-off
gas cock upstream of the unit control system.
The unit is equipped with a nipple that extends
outside the cabinet.
Check that the gas category is in accordance
with the data described on the air heater.
Ensure that a gas supply line includes a filter and
has been tested and purged in accordance with
prescribed practice prior to commissioning and
taking the air heater into service.
This appliance is equipped for a maximum gas
supply pressure of 50mbar.
Never use a flame to test for gas
soundness.
PHOTON unit heaters are designed to operate
on natural gas (G20, G25 or G25.3). Check
that the gas supply, gas category and gas inlet
pressure is in accordance with the information
given on the unit data plate. To let the unit
function at maximal heat output, the gas
supply pipe MUST be correctly sized. Close to
the air heater a gas tap with coupling must be
mounted for servicing (see figure 4).
The unit is equipped with a nipple that extends
outside the cabinet. The gas connection is ½-,
¾-, or 1-inch, depending on the size of the unit.
The whole of the gas service installation
including the meter must be inspected, tested
for soundness and purged in accordance with
appropriate requirements by a qualified person.
Figure 4 Gas Connection Details
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