Page No 18 Reznor, Guardian 1 Phase Electric Heat, Installation Manual, EN 2021-08, D301299 Iss D
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CONTROLLER
Introduction
The function of the display panel is to send
commands to and receive status messages from up
to 16 controls in a multi heater system.
The display panel has a microcontroller, a 16
character by 2 line display, 4 buttons and a
communication interface. It also has a clock with
battery back-up to provide time based control
functionality.
The display panel can be set to operate with
different languages at the time of installation.
The display panel will work with all air curtains
types: electric, legacy electric, LPHW/Ambient and
legacy LPHW. Electric and legacy electric air curtains
can operate in a mixed network. However due to
differences in operation new LPHW and legacy LPHW
air curtains cannot be mixed in a network but can be
operated in separate networks.
Additionally the new electric air curtain controls are
compatible with legacy 3 button display networks
however, again due to differences in operation, the
new LPHW/Ambient air curtain control will not work
under control of a legacy 3 button display.
Networking
The display panel is connected to the first air curtain
via pre-wired RJ45 cable to the socket in the first air
curtain housing. See figure 25 on page <?>
Connect a second RJ45 cable in to the spare RJ45
socket of the first air curtain, and then take across to
one of the RJ45 sockets in the second air curtain.
Further RJ45 cables can be used to connect more air
curtains to the network, up to a maximum of 16 air
curtains can be linked to one display panel.
The RJ45 cable is 10m as standard however it is
available in 2m, 20m, 30m, 50m and 100m lengths.
Maximum length 100m. (Total length
of cable used between display panel
and last air curtain in network).
It is recommended that this control cable is run
separately within its own trunking if possible, to
avoid external interference.
Note: All air curtains connected within the
network system can be controlled under the
user settings of the single display panel.
Air curtain addressing
All air curtains work on an address to communicate
with the display panel and are supplied with an
default address of ‘0’.
Where multiple air curtains exist in a network they
must be re-addressed using a unique address
(0-9/A-F). This is achieved using the 4 way DIP switch
[2] mounted on the control panel base unit PCB.
Figure 23 DIP switch position
The display panel will check all addresses on first
power up and the result will be displayed. All
addresses will be viewed in rotation.
Note: If any address is altered after initial power up
or an air curtain removed after initial installation,
the display panel will also retain the original
address although unable to respond. To remove an
unwanted address, rescan the whole network in the
manner detailed in Engineers settings on page 22.
Figure 24 Air curtain address numbers
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