10 LRR 1-52, LRR 1-53, URB 55 - USA - Installation & Operating Manual - 850703-00
Usage for the intended purpose
LRR 1-52 and LRR 1-53 conductivity controllers can be used in combination with LRG 1x-x
conductivity electrodes and LRGT 1x-x conductivity transmitters as conductivity controllers and
limiters in steam boilers and hot water installations and in condensate and feedwater tanks. The
conductivity controller indicates when MAX or MIN conductivity has been reached, opens or closes
a continuous blowdown valve and can actuate an intermittent blowdown valve. LRR 1-52 and
LRR 1-53 are classified as operating controls in accordance with UL 60730-1.
Configuration, operation and visual display
The equipment is configured and operated and information is viewed via the URB 50 or URB 55
visual display and operating unit. The URB 55 is designed for installation in a control cabinet door
or switch panel. It may only be used when correctly installed. If you are using a URB 50, please pay
attention to the information in Installation & Operating Manual “LRR1-52-LRR1-53-URB50”.
Overview of possible equipment combinations
Conductivity controller Conductivity electrode/transmitter Visual display and operating unit
LRR 1-52
LRG 16-4
LRG 16-9
URB 55
LRR 1-53
LRGT 16-3 / 16-4
LRGT 17-3
Fig. 1
Key to Fig. 1:
LRR = conductivity controller
LRG = conductivity electrode
LRGT = conductivity transmitter
URB = visual display and operating unit
To ensure proper use in all applications, please also read the Installation & Operating
Manuals for the system components used.
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You can find the latest Installation & Operating Manuals for the system components
named in Fig. 1 on our website:
http://www.gestra.com
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