Burnham ES2 - Manual (Page 31)

31
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T STAT 3
OFF
ON
ZONE 4 PRIORITY
TACO ZVC 404 (OR EQIV.)
FOUR ZONE ZONE VALVE CONTROL
WITH OPTIONAL PRIORITY
THERMOSTAT
BOILER JACKET
PANEL
1 2 3 T T
1 1
4
2
3
5
6
7
8
2
3
LINE VOLTAGE FACTORY WIRING SIZE 14 AWG TYPE TW OR TEW/AWM WIRE
LINE VOLTAGE FIELD WIRING
VALVE 3
T STAT 4
VALVE 4
POWER
POWER IN T T
ZONE 1
T T
ZONE 2
T T
ZONE 3
T T
ZONE 4
MODE
NORMAL RESET
THERMOSTAT THERMOSTAT
ZONE 1
1 2 3 4
ZONE 2
1 2 3 4
ZONE 3
1 2 3 4
ZONE 4
1 2 3 4
N/O COM N/C
ZONE 4 RELAY
DHW
CIRCULATOR
(SUPPLIED BY
OTHERS)
JUMPER
3 & 4
2 WIRE ZONE
VALVE
(NO END SWITCH)
2 WIRE ZONE
VALVE
(NO END SWITCH)
1
4 WIRE ZONE
VALVE
(POWER OPEN,
SELF CLOSING)
JUMPER
3 & 4
PRIORITY
ZONE
FU
SE
(3
AM
P
M
AX
.)
24V
TRANSFORMER
L1
POWER
SUPPLY
120/60/1
L2
DHW AQUASTAT
(L4006, L4080)
(SUPPLIED BY OTHERS)
DOMESTIC HOT WATER PRIORITY IS
SELECTED USING ZONE PANEL SWITCH
SYSTEM
CIRCULATOR
(SUPPLIED BY OTHERS)
WIRING USED WHEN DOMESTIC
HOT WATER PRIORITY IS DESIRED
N/O COM N/C
ZONE 4 RELAY
MAIN
END
SWITCH
EXTRA
END
SWITCH
DHW
CIRCULATOR
(SUPPLIED BY
OTHERS)
L1
L2
SYSTEM
CIRCULATOR
(SUPPLIED BY OTHERS)
WIRING USED WHEN DOMESTIC
HOT WATER PRIORITY NOT DESIRED
IQ OPTION PANEL
MAIN
END
SWITCH
EXTRA
END
SWITCH
2
3
Figure IW-: Multiple Zone System with Zone Valve Panel
INteRNAL WIRING (continued)