SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 3
– FUNCTIONAL DESCRIPTION
OMM-0069_0H
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25
of
134
120 VAC, 60 Hz
OR
220 Hz, 50 Hz
HEAT
EXCHANGER
MIXED
TEMP
24 VAC XFMR
WITH 3A, 24 VAC
CKT BRKR
POWER INPUT
OVER-TEMP
SWITCH
CONTROL BOX
CIRC
PUMP
DOMESTIC WATER
DOMESTIC
COLD
WATER IN
TEMPERATURE
CONTROLLER
DHW DUAL OUTLET TEMP
MIXED IN
BW OUT
BW IN
STRAINER
A
AB
3-WAY
24 VAC
0
– 10 V
DHW
OUT
B
FEED FORWARD TEMP
DHW OUT
BOILER
WATER (BW)
OUT
STRAINER
POWER
SWITCH
TO CIRC
PUMP
TC
OUT
TC
IN
BOILER
WATER (BW)
IN
(SEE NOTE 1)
( SEE NOTE 2)
NOTES:
1. THE BW TC IN & BW TC OUT THERMOCOUPLES ARE CONNECTED TO DISPLAY DEVICES IN THE
CONTROL BOX.
THESE ARE “INDICATION ONLY” DISPLAYS WHICH MAY BE USER-CONFIGURED FOR
ALARM SETTINGS.
2. THE BOILER WATER BYPASS LINE IS NORMALLY OPEN (3-WAY VALVE CONFIGURATION). FOR A
2-WAY CONFIGURATION, CLOSE THE VALVE ON THE BYPASS LINE. ENSURE THAT A BYPASS LINE IS
INSTALLED EXTERNAL TO THE SMART PLATE.
DHW OUTLET TEMP
F
FUSE
TC MIX
TC DUAL
Figure 3-1. SmartPlate Water Heater Functional Block Diagram
120 VAC, 60 Hz
OR
220 VAC, 50 Hz
or
220 VAC, 60 Hz