Mechanical Aquastat Wiring - Amtrol HYDROMAX HM-80 Installation & Operation Instructions

7. Mechanical Aquastat Wiring Diagrams
Common wiring diagrams are shown below. Select the appropriate diagram for the application. Diagrams are popular examples
only. If your application is not shown, contact Amtrol Technical Support at 401.535.1216.
Boiler Controls
Typical Oil Burner (Non-Priority)
L1
AQUASTAT
WHEN NO "ZR" TERMINAL IS AVAILABLE
GO TO THE SUPPLY SIDE OF THE HI LIMIT
Zone Valves
3-Wire
24VAC
END
SWITCH
TRANSFORMER
ZONE VALVE
Other Applications
Multi-Zone Control
AQUASTAT
L2 L1
DHW ZONE
X X
TO BOILER
HYDROMAX
CIRCULATOR
OR ZONE VALVE
HONEYWELL
R4222D 1013
OR EQUIVALENT
DPDT RELAY
1 3
ZR
2
4 6
5
HYDROMAX ®
CIRCULATOR
COIL
L1
AQUASTAT
TRANSFORMER
L2 L1
L2 L1
Boiler Control Input
®
AQUASTAT
4-Wire
AQUASTAT
24VAC
MOTOR
ZONE VALVE
END
SWITCH
AQUASTAT
DHW ZONE
HYDROMAX
®
CIRCULATOR
OR ZONE VALVE
-8-
Typical Gas Valves (Non-Priority)
HONEYWELL
W
R4222D 1013
OR EQUIVALENT
Z
DPDT RELAY
1 3
2
L1
4 6
5
COIL
Universal Sensor Kit
Installing Universal 10K Ohm Sensor Kit
HYDROMAX models with a mechanical aquastat
include a universal temperature sensor kit allowing
HYDROMAX to be used with any boiler control featuring
a standard "10K" DHW thermisor input (10,000 Ohms
at 77°F). When installed, domestic water temperature is
regulated by the boiler and the HYDROMAX aquastat is
not used.
1. Unscrew and remove copper sensor bulb from
sensor well.
2. Insert Universal Sensor to bottom of sensor well.
3. Plug Universal Sensor into Extension cable.
4. Connect wire leads to DHW input terminals on
boiler control.
AQUASTAT
SENSOR BULB
(REMOVE)
EXTENSION
CABLE
DHW
BOILER CONTROL
BOILER
B
HYDROMAX ®
CIRCULATOR
L2
PLUG
UNIVERSAL SENSOR
IN SENSOR WELL
HYDROMAX
®