INSTALLATION GUIDE · USER MANUAL
GAS HEATER SERIES
G&D CHILLERS, INC.
•
GD
-
MNL
-
GSHTR_R2024B
11
SEQUENCE OF OPERATION
1.)
Turn door power switch to “ON” posi�on
.
2.)
Door power switch will energize thermostat when turned on.
3.)
Thermostat sends power to pump contactor coil and heater contactor.
4.)
When fluid reaches desired set point, the thermostat stops sending power to the heater
contactor and the heater turns off
Below is the Rinnai temperature controller located on the door
panel
of the electrical enclosure. It is
primarily
used
as a display screen
only, and shows the temperature of the glycol/water
leaving the Rinnai
gas heater(s).
Do not modify the
temperature
set-
point here!
The Rinnai controller is set at the G&D factory and
should not require adjustment in the field.
Heater status indicator
Measured temperature
Rinnai