6. WIRING
-8-
CH-41Z and CH-80Z options utilize a standard dry-contact aquastat with capillary temperature sensor. The dial control
contains a make-and-break switch and is suitable for 24V.
CH-41BZ options utilize a standard dry-contact aquastat with capillary temperature sensor. The dial control contains a
make-and-break switch and is suitable for 24V or 120V, 25A Max.
To wire Dial Control models, select the appropriate diagram from the following pages. If a suitable diagram is not available for
your application, please contact AMTROL Tech Support at (
401)535-1216. Always disconnect power before wiring the control.
Ensure that the proper conduit and connectors are used per your local code. In lieu of local code, the National Electric Code
(NEC) should be followed. If power is supplied to the control, minimum 18-gauge wire should be used in conjunction with an
NEC Class II transformer.
Note: Line-voltage and safety-circuit wiring which is external to the water heater jacket when all panels are in place, and which
is part of the appliance, shall be protected by metal conduit, metal-clad cable or raceways. "Power Limited Circuit Cable" need
not be provided with the protection specified above if it is securely fastened to the appliance jacket and follows the contour of
the appliance jacket. Thermoelectric circuit wiring shall be exempt from this provision.
Note: Strain relief shall be provided for all conductors leaving an enclosure. For low-voltage wiring, strain relief at the point of
exit from an enclosure is not necessary if, by wire location or support, protection is provided against accidental strain.
Note: If an external electrical source is utilized, the appliance, when installed, must be electrically grounded in accordance with
local codes or, in the absence of local codes, with the National Electrical Code, ANSI/NFPA 70.
Note: The thermostat is adjusted to 120°F. when shipped from the factory.
CAPILLARY TUBE
SENSOR BULB
SHAFT
WIRE LEADS
DPDT RELAY
BoilerMate
®
THERMOSTAT
BoilerMate
®
CIRCULATOR
(ON BOILER
CONTROL)
L2
L1
COIL
ZR
2
3
1
4
6
WHEN NO “ZR” TERMINAL IS AVAILABLE
GO TO THE SUPPLY SIDE OF THE HI LIMIT
120 VOLT - ZR TERMINAL
SCHEMATIC 1
5
24VAC
DPDT RELAY
STACK SWITCH
(ON BOILER CONTROL)
BoilerMate
®
THERMOSTAT
24VAC
BoilerMate
®
CIRCULATOR
L2
“T”
“T”
COIL
2
3
1
4
6
24 VOLT - STACK SWITCH
5
L1
SEPARATE CIRCULATOR
SEPARATE CIRCULATOR
