Coates ST SERIES 5.5 & 11kW 240V SINGLE PHASE - Manual (Page 4)

MODEL 12406ST / 12411ST
Wiring Diagram
1
2
HTL: HI-TEMP CUT OFF “MANUAL RESET”.
TC: TEMPERATURE CONTROL - THERMOSTAT.
ELM 1 - 2: HEATING ELEMENT(S).
CON 1: CONTACTOR, 2 POLE, 50 AMP RES.
PL 1: PILOT LIGHT “ELEMENT”.
PL 2 PILOT LIGHT “FLOW SWITCH”.
FLOW: FLOW SWITCH
RLY: FLOW RELAY
FACTORY SPLICED LEADS ARE PROVIDED FOR
CONNECTION TO CUSTOMER SUPPLIED AUXILIARY
CONTROLS. i.e. REMOTE THERMOSTAT OR HEATER
“ON/OFF” SWITCH. SEE YOUR DEALER FOR FURTHER
INFORMATION.
INSULATED GROUND CONDUCTOR, COPPER ONLY.
MUST BE SAME SIZE AS THE SUPPLY WIRING, BUT
NOT LESS THAN # 12 AWG.
LINE 1
LINE 2
GROUND
RED #8
BLK #8
HEATING
ELEMENT - 1
“ELEMENT”
LIGHT
PL1
“FLOW”
LIGHT
PL2
TEMP.
CONTROL
TC
TEMP. LIMIT
CONTROL
HTL
BLUE
RED
RED
BLK
RED
RED # 8
RED # 8
BLK # 8
BLK
RED
BLK # 8
1
2
CON 1
COIL
CON 1
COIL
240V
NO COM
RLY FLOW
BLUE
BLUE
RED
RED
HEATING
ELEMENT - 2
12411ST
240V
J4 J3
J1
J2
AC
AC
C NO
J9
B W R
TEMP
PROBE
BLK
TABLE 1
RECOMMENDED
SUPPLY WIRING
MODEL NO. HEATER
KW/VOLT
RATING
NO. & KW OF
HEATING
ELEMENTS
HEATER
CURRENT
RATING
RECOMMENDED
CIRCUIT RATING
COPPER @ 60° C
12406ST 5.5 @ 240VAC 1 @ 5.5 KW 23 AMPS 30 AMPS #10 AWG
12411ST 11 @ 240 VAC 2 @ 5.5 KW 46 AMPS 60 AMPS #4 AWG
TABLE 2
ITEM PART NUMBER DESCRIPTION QTY
1 – CON1 21000100 CONTACTOR, 2P, 50 AMP, 240VAC 2
2 - TC 22002150 DIGITAL TEMPERATURE CONTROL 1
3 - FLOW 23000105 FLOW SWITCH, 20 GPM 1
4 - HTL 22003820 HIGH TEMPERATURE LIMIT, MANUAL RESET 1
5 - RLY 21006010 FLOW RELAY, 30AMP, 240V 1
6 – PL1,2 29034620 PILOT LIGHTS for ELEMENT and FLOW 2
7 62002615 VESSEL ASSEMBLY, STAINLESS STEEL 1
8 20005061 HEATING ELEMENT, 5.5KW, 240 VOLTS *
9 29020025 GROUND LUG, LA-2 1
10 29020035 BONDING LUG, SAU-70 1
11 32705010 UNION ASSEMBLY 2
* SEE TABLE 1 FOR ELEMENT QUANTITY
When ordering parts from your dealer, provide the model number and serial number of your heater.