9
SYMBOL DESCRIPTION REMARKS
LCOM Common for LED’s
LS
Expansion Tank / Cistern
Level Switch
Not Used
LT Evaporator Thermister
LTPV
Refrigerant Proportional
Control Valve
40V; 0-400mA
MAR1
High Fire Time Delay Relay
10 Sec
MB Burner Motor Contactor 120V Coil
MF
Flame Failure Dry Contact
Not Used
MP SP Starter
OP
Enable Signal Dry Contact
24V, 60va Max
OPL
Run Mode LED on
Remote Control Panel
P
Chilled/Hot Water Pump
Dry Contact
24V, 60va Max
P1 Chilled/Hot Water Pump
P2 Cooling Water Pump
P1E
Chilled/Hot Water Pump
Safety Interlock
P2E
Cooling Water Pump
Safety Interlock
PCH Palladium Cell Heater 200V; 30 Watts
PV Pilot Valve 120V Coil
R1 Burner Alarm Relay 120V Coil
R2
Mod Motor Control Relay
120V Coil
RBL
Gas Burner Demand Dry
Contact
24V, 60va Max
RBP
Burner Power Control Relay
24V Coil
RBPW
Burner Demand Control
Relay
RCVR CVR Motor Control Relay
RMP MP Control Relay 24V Coil
RRBH
Burner High/Low Control
Relay
24V Coil
RRBL
Burner Start/Stop
Control Relay
24V Coil
SYMBOL DESCRIPTION REMARKS
RV2
SV2 & SV22 Control Relay
24V Coil
RV9
SV9 & SV92 Control Relay
24V Coil
SA1 MOV Surge Protector
SA2 MOV Surge Protector
SP Solution Pump
ST2 External Safety Interface
NO or NC switches
SV1
Evaporator Freeze
Protection Valve
24V Coil
SV10
High Fire Burner Demand
Control Relay
SV2
Solution Flow Control
Valve
200V Coil; CH-
K60, 80, & 100
Only
SV22
Solution Flow Control Valve
200V Coil; CH-
K80 & 100 Only
SV4
Low Fire Burner Demand
Control Relay
SV9
Concentrated Solution
Bypass Valve
200V Coil
SV92
Concentrated Solution
Bypass Valve
200V Coil; CH-
K80 & 100 Only
THRP SP Over-Current Relay
TR BOX Transformer Box
TR1-ULCE Power Transformer
Primary; 200V,
24V, & 32V AC
Secondary
TR2-UL Power Transformer
Primary; 120V AC
Secondary
TR-LV Power Transformer
18V & 15V AC
Secondary
WTI
Entering Chilled/Hot
Water Thermister
Field-Installed
Option
WTO
Leaving Chilled/Hot
Water Thermister
CAPACITY CONTROL
COOLING HEATING
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