Diversitech CS-1 Instruction/Installation Manual

TECHNICAL SERVICE BULLETIN

March 26, 2019

Installation Update

This bulletin claries the installation protocol

recommended by DiversiTech for condensate switch
products CS-1, CS-2 and CS1200.

Description: Some Communicating HVAC Systems using
a dedicated condensate overow safety switch
shutdown input will require the use of an additional
(optional) relay. The additional relay is only required if,
aer the installation of the above products, the HVAC
system does not properly shutdown during verication
testing.

Testing: Proper system shutdown verication testing is
performed by rst, ensuring that the system is running
normally. Then,

- For CS-1 & CS-2, raising the Pull-To-Test lever

- For CS1200, pushing the test button

CHECK BACK FOR

ADDITIONAL INFORMATION

CS-1

CS-2

And nally, check that the system shuts down as
expected. If the unit does not shutdown, your unit is more
sensitive to switch characteristics than traditional systems
and, therefore, requires a relay. Please proceed to
implement the relay solution outlined below.

Action: Use a normally open SPST relay with a 24VAC coil
(DiversiTech part # D90-290Q or equivalent) to break the
condensate overow safety shutdown input circuit.
DiversiTech condensate switch CS-1, CS-2, or CS1200
should be used to make or break control power to the
relay coil.

Control Board in Air Handler

Float Switch
Terminal Block/Connector

SPST-NO Relay

Coil: 24VAC; 1.5A Max

NC Float Swtich

24 VAC
Power Supply

CS1200

Please contact DiversiTech Customer Service at [phone]
with any questions.

DOC151908
www.diversitech.com

1.800.995.2222

6650 Sugarloaf Parkway, Suite 100

Duluth, GA 30097

678.542.3600

Fax [phone]