KE2 Therm Solutions 20543 Installing

Installing the KE2 Therm Door Switch
thermsolutions
Basic Description
high traffic installations, the door switch provides in-
creased energy efficiency, more stable product tem-
perature, and is effective at preventing coil freeze
ups. The reed switch is hermetically sealed with a PVC
shock absorber, enclosed within a solid aluminum
housing.
Installation wires are protected in a 36" (61 cm)
stainless steel armored cable. The magnet is mounted
on an adjustable L shaped bracket providing greater
flexibility, universal mounting, higher pulling power, and a professional appearance.
Controller Operation with Door Switch Activated
Normal system operation while the door is closed.
When the door is opened, evaporator fans are turned off.
If the door is open for longer than 60 seconds, the solenoid & EEV close to initiate
system pumpdown. System will remain in pumpdown until door is closed.
If the door is open for time set in Door Alarm Delay (default 30 min.) and the tem-
perature rises 5°F (2.8°C) above setpoint, a Door Alarm is activated and the system turns on to resume cooling
Once the door is closed, normal system operation resumes.
Mounting the Door Switch
The door switch mounts in any position along the door, however the
A
gap between the magnet and the contact assembly/sensor
not exceed 2" (5 cm) when the door is closed.
If the gap is greater than 2" (5 cm) the door switch will continually signal
that the door is open, and the controller will turn off the evaporators.
To adjust the gap, the L-bracket has
the magnet can moved forward, or backward, in the slot
Attach to
the door
C
multiple holes
A
for exibility
when mounting
D
magnet can
be adjusted
forward or
backward
in the slot
Wiring to the Controller's Digital Input
Wire the door switch (dry contact) to a Digital Input (DI1 default). Be-
cause the wires are not polarized, either wire can connect to either
terminal on the pluggable connector.
Door switch wires may be extended with 18 AWG twisted shielded pair wire. Max 100ft.)
Configuring Ethernet Enabled Controllers:
Configuring Non-Ethernet Enabled Controllers:
: Designed to withstand rugged
C multiple mounting holes, and
D .
L-Bracket
Magnet
Armored
Cable
3 ft. (91 cm)
Contact Assembly
1 2 3 4
B
Attach to
the wall
Transformer
18V
3A Relay
COM
3A Relay
COM
Digital Inputs
DI 1
*
DI 2
DI 3
Temperature Sensors Pressure
T4Aux T3Coil T2Air T1Suct
KE2 Evaporator Efficiency, KE2 Evap for Rack Efficiency & KE2 Controlled Environment
KE2 Low Temp & KE2 Adaptive Control
Door Switch - Specifications - pn 20543
Contact
Contact Rating
Contact Type
Max Carry Current
Max Switching
Current
Breakdown Voltage
Operating Gap
Temperature Range
Housing Material
Cable Length
Certifications
Position
The magnet mounts
to the inside or out-
B can-
side of the L-Bracket.
Inside
Power In
line / L1
L-Bracket &
ground
neutral / L2
Magnet Options
COM
NO NC
COM
NO NC
COM
NC
NC
NO
NO
COM
NC
NC
NO
NO
KE2 Therm has videos on door switch instal-
lation and programming on our YouTube
Transducer channel, at YouTube.com/ke2therm.
_
+
Q.1.27 March 2022
22AWG
10VA
Normally Open
2 Amp
.5 Amp
250 VDC
2 inches (5 cm)
32°F to 120°F (0°C to 49°C)
solid aluminum housing
36" (91 cm) stainless steel armored cable
UL and ULC listed
The Contact Assembly / Sensor should
be mounted parallel to one another. The
switch should activate when within two
inches of the magnet, but may need to
be closer depending on the material the
switch and magnet are mounted to.
Outside Mount switch parallel to the magnet
thermsolutions TM
KE2 EvaporatorEfficiency
Top of Door
ENTER
BACK
Side of
Door