ELECTRICAL INSTALLATION
INSTRUCTIONS
1. Disconnect the electrical supply to the pump before
installing the controller.
2. Refer to the applicable wiring diagram
- Figure 1: Cold Start Boiler
- Figure 2: Tankless Coil
3. Verify that the circulator(s) do not exceed the electrical rat-
ing of the controller.
4. Make electrical connections according to the applicable
wiring diagram. Run the pump power through the holes in
the controller chassis to the applicable L/N terminals. Keep
120 VAC and 24 VAC wiring separate. All 120 VAC wiring
should be 14 AWG (minimum) copper electrical. Perform all
wiring in accordance with applicable codes.
5. Run the thermostat wires through the grommet(s) in the
controller chassis and connect to the appropriate R/W ter-
minals. Keep 24 VAC wiring separate from 120 VAC wiring.
DESCRIPTION
The Bell & Gossett ZoneTrol II and McDonnell & Miller Zone-
Smart Pump Controllers are designed to control 120 VAC
circulating pumps in hydronic systems.
Max.
T-stat
Number of
Max.
Model
Current
Zones
HP/Pump
Z-1 / ZS-1
0.085
1
1/3
LED DEFINITION
Power LED will illuminate when input power is applied to the
controller. Zone LED will illuminate when relay is energized.
MECHANICAL INSTALLATION
INSTRUCTIONS
The pump controller should be securely mounted on a wall
near the pumps using four #8 screws (not included).
Installation, Operation and Service Instructions
Bell & Gossett
®
ZoneTrol II
™
Model Z-1
McDonnell & Miller ZoneSmart
™
Model ZS-1
SAFETY
INSTRUCTION
This safety alert symbol will be used in this manual and on the
unit safety instructions decal to draw attention to safety related
instructions. When used, the safety alert symbol means
ATTEN-
TION! BECOME ALERT! YOUR SAFETY IS INVOLVED!
FAILURE TO FOLLOW THE INSTRUCTIONS MAY RESULT
IN A SAFETY HAZARD.
INSTALLER:
PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.
Instruction Manual 210711
REVISION A
1
WARNING: Electrical Shock Hazard
Electrical connections are to be made by a qualified
electrician in accordance with all applicable codes, ordi-
nances and good practices Disconnect and lock out the
power before making electrical connections. Failure to fol-
low these instructions could result in serious personal injury
and/or death.
WARNING: Electrical Shock Hazard
When wiring per the Tankless Coil Application, pump
controller and boiler aquastat must be on the same circuit
and have a common disconnect. Failure to follow these
instructions may introduce a secondary source of power
resulting in personal injury or death.
UL
®
C
US
LISTED
