Wiring Guide

53
TEKMAR Communication Thermostat (TN4) Connected to SR504-EXP Switching Relay
TEKMAR
USER SWITCH
(OPTIONAL)
TO: “TT” ON BOILER
BOILER
H
N
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
120 VAC
INPUT
PRIMARY CIRCULATOR
(OPTIONAL)
FOUR ZONE
EXPANDABLE
SWITCHING RELAY
POWER
CONTROLS
120 VAC CIRCULATORS
ZC
INPUT
120 VAC
ZONE 1
ZONE 2 ZONE 3 ZONE 4
ZONE1
ZONE2
ZONE3
SR 504-EXP-4
FUSE
6 AMP
FUSE
6 AMP
FUSE
6 AMP
FUSE
6 AMP
FUSE
6 AMP
FUSE
6 AMP
NET
EXPANSIONMAIN PRIORITY
XX
XX
AB
CRW
CRW
CRW
CRW
C
12
END SWITCH THERMOSTATS (24 VAC)
PRIORITY
N/C
PRIMARY
120 VAC
ZR
H H N H N H NH NH NH NH N H
SLAVE
PRIORITY ON
RESET
PRIMARY PUMP ON
POST PURGE ON
PRIORITY PROTECT ON
PUMP EXERCISE ON
30 SEC/2 WK
MASTER
OFF
OFF
OFF
OFF
OFF
NORMAL
LOW LIMIT (ZC) ON OFF
4 MIN/24 HOUR
ZONE4 ZONE4
PRIORITY
ACCESSORY
PORT
ZONE 2
POWER
ZONE 1
ZONE 3
ZONE 4
LED
INDICATORS