Installation Guide
CSR-112 / CSR-124 Command Relay
Oct 13, 2009 www.greystoneenergy.com 1-800-561-5611 support@greystoneenergy.com Page 2
Wiring
The controller digital output (either 12 Vdc
for CSR-112 or 24 Vdc for CSR-124)
controls the CSR command relay coil input.
When the coil signal is received, the CSR
relay contacts close to supply 120 Vac power
to the motor contactor.
The motor contactor then switches the 600
Vac power to the fan and the fan starts.
The CS-610 current switch monitors the
current flow to the fan and when it’s trip level
is exceeded, it supplies a digital input signal
to the controller to indicate the fan status.
The CS-610 monitors the current to the
heater. When the heater current exceeds
the CS-610 trip point, the CS output
contacts close to complete the low
voltage circuit and 24 Vdc is applied to
the CSR-124 coil input.
The energized coil input closes the CSR
relay contacts and applies 120 Vac to
the fan.
