LAARS EDN Series - Installation, Operation and Maintenance Instructions - Manual (Page 21)

Endurance Page 21
1
2
3
1 1
2 2
3 3
ENDURANCE FIELD
WIRING BOX
T'STAT (T)
GROUND
120 VAC LINE
C1
CIRCULATOR
T'STAT (T)
CIRCULATOR
120 VAC NEUT.
RED
WHT/RED
GRN/YEL
BLK
BLU/WHT
WHT
BLU/WHT
ZONE THERMOSTATS
TRANSFORMER
120 VAC
120
VA
C
R
TACO ZONE VALVES
RELAY
24VAC COIL
N.O.CONTACTS
24 VAC
Figure 27. Multiple Zones with Three Wire Zone Valves (Requires Isolation Relay).
Figure 28. Multiple Zones with Circulators and Room Thermostats.
NOTE: This wiring is NOT the same
as shown by valve manufacturer.
Figure 29. Wiring for Single Zone Power Stealing Type Clock Thermostats That Require 24 VAC.
RELAY
24 VOLT
NO CONTACT
LAARS
P/N 2400-060
TO T-T BOILER
CONNECTIONS
120V/24-20VA
W Y G
R Rc
L1 (HOT)
L2
120
VAC
TRANSFORMER
NOTE: This wiring required only for
single zone applications utilizing clock
thermostats requiring 24 volt power
supply.
RED
RED/WHT
BLUE/WHT
WHT
BLK
FIELD
WIRING BOX
ZONE1 ZONE2 ZONE3
120 VOLT CIRCULATORS
N
24VAC
POWER
THERMOSTATS
P ZC H X1 X2
ZONE1 ZONE2 ZONE3
BOILER T-T
BOILER T-T
CIRULATOR/ZONE VALVE (HOT)
120 VAC (NEUTRAL)
120 VAC (HOT)
TYPICAL ZONE PUMPS RELAY
ARGO AR8---
B&G ZT-
HONEYWELL R8---
TACO 005
TACO SR502
SINGLE RELAY 1-3
ZC-P
ZC-LI
PR,JN
ZC-ZR
ZC-ZR
ZC
PR,JN
ZC
ZC
3
ZC
5-6
XI-X2
H1-H2
X-X
3-4
X-X
MFG&MODEL JUMPER BLUE/WHITE RED-RED/WHITE
FROM
REMOVE CONNECT CONNECT
TO TO