REFCO AcquSwitch - Manual

HVAC/R
Service Products
REFCO Manufacturing Ltd. Telefon +41 41 919 72 82
Industriestrasse 11 Telefax +41 41 919 72 83
CH-6285 Hitzkirch (Switzerland) [email protected] www.refco.ch
INSTALLATION OPERATION
AND MAINTENANCE GUIDE
AQUASWITCH
SPECIFICATION
Power Supply 90 – 254 V, 50/60 Hz
24V AC/DC
Switching capacity 5A 250VAC 1250VA
Operating Temperature Air 0–70°C (32–158°F)
Water 0–50°C (32–122°F)
Switch On/Off Level ON: 10mm typical
6mm min., 14mm max.
Hysteresis 2mm
Delay on level fall 3 seconds as standard
Marker on cable denotes any other time delay
Protection IPX7
DESCRIPTION
The AquaSwitch is a rising water liquid level detector. Its solid state elect-
ronic sensing is not effected by oil film, metal trays, nor by slightly off the
vertical mounting position. The small footprint (4 x 5 cm) and the low swit-
ching level means that the AquaSwitch may be mounted in the smallest
of reservoirs. The in-built isolated relay switches loads up to 1250VA. This
allows the user to select the AquaSwitch to directly switch pumps and sole-
noids or interface into other control circuits. The built-in Delay to off timer
may be used to allow water being drained or pumped to be fully vacated or
just to prevent nuisance switching.
SAFETY FIRST
Disconnect all power supplies before starting installation or maintenance
work. The interconnecting conductors and connections are to be confined
within the host equipment. All wiring and connections are for internal in-
stallation only. This product must be installed only by competent engineers.
There are no user serviceable parts in this control. Do not use if damaged in
any way. Check the label to ensure this product is the correct voltage.
INSTALLATION
The AquaSwitch is intended to detect rising condensate water levels in A/
C and Refrigeration applications. It may also be used in Reservoir Top-Up
or High Level Alarm applications. The AquaSwitch is a semi-submersible
switch therefore it must not be used in application where it will be perma-
nently submerged or for long extended periods. It is not recommended to
use it as a low level switch. The AquaSwitch may be used in metal or plastic
collection trays. When positioning, ensure that there is 8 mm of clearance in
front and 5 mm below the sensing pads. The AquaSwitch will operate tilted
in any direction from the normal by up to 45° however for reliable operation
position the AquaSwitch flat and level. Tray depth must be at least 17 mm
to prevent overflowing.