Mechanical Aquastat Wiring - Amtrol HYDROMAX HM-41 Installation & Operation Instructions

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)
HONEYWELL
R4222D 1013
OR EQUIVALENT
DPDT RELAY
L1
AQUASTAT 1
4
WHEN NO "ZR" TERMINAL IS AVAILABLE
GO TO THE SUPPLY SIDE OF THE HI LIMIT
Zone Valves
3-Wire
AQUASTAT
24VAC
END
SWITCH
TRANSFORMER
ZONE VALVE
L2
Other Applications
Multi-Zone Control
AQUASTAT
L2 L1
DHW ZONE
X X
TO BOILER
HYDROMAX
CIRCULATOR
OR ZONE VALVE
7. Mechanical Aquastat Wiring Diagrams
3
ZR
2
6
5
HYDROMAX ®
CIRCULATOR
COIL
L2
4-Wire
TRANSFORMER
L2 L1
L1
Boiler Control Input
AQUASTAT
DHW ZONE
®
Typical Gas Valves (Non-Priority)
AQUASTAT
Universal Sensor Kit
Installing Universal 10K Ohm Sensor Kit
HYDROMAX models with a mechanical aquastat
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
24VAC
sensor well.
2. Insert Universal Sensor to bottom of sensor well.
3. Cut male plug from end of sensor cable, strip
MOTOR
sheathing and wire insulation from end.
ZONE VALVE
4. Connect wire leads to DHW input terminals on
boiler control.
END
SWITCH
AQUASTAT
BOILER CONTROL
HYDROMAX
®
CIRCULATOR
OR ZONE VALVE
-8-
HONEYWELL
W
R4222D 1013
OR EQUIVALENT
B
Z
DPDT RELAY
1 3
2
L1
4 6
5
HYDROMAX
CIRCULATOR
COIL
SENSOR BULB
(REMOVE)
EXTENSION
CABLE
PLUG
DHW
UNIVERSAL SENSOR
IN SENSOR WELL
BOILER
®
L2
HYDROMAX
®