Cambridge Engineering, Inc. 60 S-Series Technical Manual
400,000 BTU & ABOVE
EDSM/TP Controls
Temperature Setback System
Temperature Averaging System
Symbol Description
AF Air Flow Switch
AMP Amplifier Solid State
AX1 Auxiliary Contact
AX Auxiliary Contact
CR1 Control Relay
D & D1 Damper Motor & End Switch
DISC Service Disconnect Non - Fused
DTS Discharge Temperature Sensor
EAT Entering Air Thermostat
FR Flame Rod
FSR Flame Safeguard Relay
FU1 Fuse 24 Volt Control
FU2 Fuse 120 Volt Control
Symbol Description
HL High Limit
IG Igniter
L1 Light - Alarm
L2 Light - Fan
L3 Light - Heat
LFS Low Fire Start
LTC Low Temperature Cutout
M Motor
MS Motor Starter
MV Modulating Valve
OL Overload Relay
OTS Override Timer Switch
RC Calibration Resistor
Symbol Description
RTSS Remote Temperature Sensor
R1 Relay - Gas Valve
SOV Shut-Off Valve - Gas
SSV Safety Shut-Off Valve - Gas
STS Space Temperature Selector
SW1 Service Switch - Fan
SW2 Service Switch - Heat
SW3 Switch - Fan/Off/Heat
SW4 Switch - SOV Leak Test
T1 Multi-Tap Transformer (24 & 120 Volt)
T2 Class 2 Transformer (24 Volt)
TPS Tamperproof Sensor
TSS Programmable Thermostat/Timer
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