15
Fig. 12 — 42WKN Unit 2-Pipe System with Heating/Cooling Changeover Aquastat and
Microprocessor Control Wiring Diagram, Sizes 18 and 20
A42-4339
AL
—
Alarm Relay
AWG
—
American Wire Gage
BAT
—
Battery
CPM
—
Condensate Pump
CPU
—
Central Processing Unit
PCB
—
Printed Circuit Board
VM
—
Vane Motor
VR
—
Valve Relay
Factory-Installed
Field-Installed
Terminal Block
Component Terminal
Connected Path
1
LEGEND