INSTALLATION GUIDE · USER MANUAL
GAS HEATER SERIES
12
This is the
Dwyer TSW-150
main controller for the glycol
temperature in the heater.
It is located inside the electrical
enclosure.
For safety purposes, this is factory set to 90°F. Change the target
setpoint
here
to achieve glycol temperatures up to 140°F
.
Setpoint controls
Status indicators:
Err
–
Memory reading error
ErP
–
Error of probe not shown on screen
AH1
–
Maximum temperature alarm, probe 1
AL1
–
Minimum temperature alarm, probe 1
AH2
–
Maximum temperature alarm, probe 2
AL2
–
Minimum temperature alarm, probe 2
ooo/(- - -)
–
open probe / shorted probe
This is the
Ranco ETC-111000
, the high temperature protec�on in
the heater.
It is located inside the electrical enclosure.
The cutoff temperature is factory set at 160°F with a differen�al of
10°F. It will prevent the heater from opera�ng if glycol temperature
reaches 160°F. Once the glycol temperature cools back down to
150°F or lower, the Ranco will allow the heater to operate normally.
High temp c
utoff
setpoint controls
Status indicators:
E1
– The (
↑) or (↓) keys while not in programming mode
E2
–
Control se�ngs are not properly stored in memory
EP
–
The temp probe is open, shorted, or reads anomalously
EE
–
EEPROM data corrup�on error
CL
–
Indicates calibra�on mode is ac�ve