Application 304V-2 - Watts Tekmar Zone Valve Control 304V Installation And Operation Manual

Application 304V–2
The Zone Valve Control 304V operates a three heating zones and a domestic hot water tank. When a thermostat calls for heat,
the zone valve opens and the system pump and the boiler turn on once the zone valve end switch closes. The domestic hot
water tank is heated using a pump. When priority is selected, the heating zones are shut off while the hot water tank is heated.
Mechanical - - - - -- - - - - --------- ----------- ---------- ----------------- --------------------- ---------------
Legend
A1 = DHW Tank Aquastat
B1 = Modulating Condensing Boiler
BP = Boiler Pump
PS = System Pump
P1 = Zone 1 DHW Tank Pump
T1 = WiFi Thermostat 561 or 562
T2 = Thermostat 518 or 519
T3 = Generic Digital Power-Stealing
Thermostat
V1 = 2-Wire Zone Valve
V2 = 3-Wire Zone Valve (e.g. Taco 570)
V3 = 4-Wire Zone Valve
Electrical - - - - - - - - - - - - ----------- ------------------- ----------------- --------------------- ---------------
T-T + -
DHW
+
-
MOD
POWER
PRIORITY
B1
120 VAC
POWER
L
L N
End switch jumper required for Zone 1
when using a pump and Zone Valve End
Switch DIP = On
B1
BP
T1
A1
C R Rh W
Away
A A
X X DHW C R W C R W
tN4 tN4
BOILER T-STAT 1 T-STAT 2
T1 T2
ROOM
RESPONSE
SYS PUMP
FUSE 2 FUSE 1
SYSTEM PRIORITY
PUMP PUMP 1
ZONE 1
N L N L N
END
MOTOR
SWITCH
PS P1
304V
Power
L N N L
A1
P1
T2 T3
C R Rh W R W
Away
A A C R W A A
C R W C R W
tN4 tN4 tN4 tN4
T-STAT 3 T-STAT 4 T-STAT 5
T3 T4 T5
SYSTEM PUMP WITH MEMBER CALL: ON
ZONE 2 ZONE 3 ZONE 4
END END END
MOTOR MOTOR MOTOR
SWITCH SWITCH SWITCH
1 2 3
V1
V2 V3
5 of 12
V1 V2
PS
DIP Switches
Master
T-stat 1 Priority = On
Exercising = On
Post Purge = On
Mod Boiler = depends on boiler
System Pump During Priority = Off
System Pump With Member Calls = On
Zone Valve End Switches = On
A
C R W B C D E
tN4
T-STAT 6 EXPANSION
T6
MASTER MEMBER
T-STAT 1 PRIORITY : ON OFF
EXERCISING : ON
OFF
POST PURGE : ON OFF
MOD BOILER : 0-10V
4-20 mA
SYSTEM PUMP DURING PRIORITY: ON
Included 510 Ω resistor must
OFF
OFF
be installed when using
ZONE VALVE END SWITCHES: ON OFF
RESERVED
power stealing thermostats
70 80
(e.g. Thermostat T3)
60 90
50 100
MOD MAX %
ZONE 5 ZONE 6
END END
MOTOR MOTOR
SWITCH SWITCH
© 2019 tekmar 304V _ D - 10/19
V3