Wiring Guide

54
TEKMAR Communication Thermostat (TN4) Connected to ZVC404-EXP Zone Valve Control
1234
ZONE 1
1234
ZONE 2
1234
ZONE 3
1234
ZONE 4
PRIORITY
ZONE
2 WIRE
ZONE VALVE
(NO END SWITCH)
MUST USE JUMPER
TACO
3 WIRE
ZONE VALVE
1
2
3
JUMPER
3 & 4
MOTOR END
SWITCH
4 WIRE
ZONE VALVE
(POWER OPEN,
SELF CLOSING)
JUMPER
3 & 4
POWER
CONTROLS
SEE NOTE 2
ZVC 404-EXP-4
FOUR ZONE EXPANDABLE
ZONE VALVE CONTROL
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
POWER IN
24 VAC
24 VAC
FACTORY
INSTALLED
TRANSFORMER
120 VAC
INPUT
WHITE
BLACK
DRY
CONTACTS
N/O COM N/C
PUMP END
SWITCH
ZONE 4 PUMP
END SWITCH
SLAVE
PRIORITY ON
RESET
POST PURGE ON
PRIORITY PROTECTION ON
PUMP EXERCISE ON
30 SEC/2 WK
MASTER
OFF
NORMAL
OFF
OFF OFF
4 MIN/24 HOUR
NOTE 2: When a circulator is used on the priority zone instead of a zone valve, jumper 3 and 4 of the priority zone.
TEKMAR
USER
SWITCH
T STAT 1
VALVE 1
T STAT 2
VALVE 2
T STAT 3
VALVE 3
T STAT 4
VALVE 4
POWER
LED
INDICATORS
TO: “TT” ON BOILER
ZONE 1
ZONE 2 ZONE 3 ZONE 4 NET
EXPANSION
MAIN
PRIORITY
XX
XX
AB
CRW
C
RW
C
RW
CRW
C
12
END SWITCH THERMOSTATS (24 VAC) PRIORITY
24 VAC ZONE VALVES
ACCESSORY
PORT
PRIORITY
XX
FUSE
5 AMP
FUSE
5 AMP
Powered from
Transformer A
Powered from
Transformer B
A
B
BOILER
120 VAC
INPUT
HN
SYSTEM PUMP
Powered from
Transformer A
Powered from
Transformer B
TO: “TT” ON BOILER WITH
DHW “TT” INPUT
R W C tn4
R W C tn4
R W C tn4
R W C tn4
tn4
R
C