93
A4 WATER CONNECTIONS (MOD. 121-126)
RE
ECH
AP1
ST1
ST2
PD
VSM
VE
SA
VSS
PU
VSM
IN
OUT
IN
RAA
VSM
KEY
AP1 = MICROPROCESSOR ELECTRONIC CONTROL
ECH = EVAPORATOR/CONDENSER PLATE EXCHANGER
PD = DIFFERENTIAL PRESSURE SWITCH
RAA= STORAGE HEATER ANTI-FREEZE HEATING ELEMENT
RE = PLATE HEAT-EXCHANGER HEATING ELEMENT
PU= PUMP
S= STORAGE TANK DRAIN COCK
SA = STORAGE TANK
ST1= SUMMER/WINTER WORKING TEMPERATURE SENSOR
ST2 = SAFETY ANTI-FREEZE TEMPERATURE SENSOR
VSM= MANUAL AIR BLEED VALVE OR DRAIN
VE = EXPANSION TANK
VS = SAFETY VALVE