Wiring Guide

9 of 12 © 2008 W 346 - 12/08
Connect the Aux Pmp 3 terminal 12 to the Mixing
Expansion Module System Pump terminal.
Connect the C terminal 14 to the Mixing Expansion
Module C terminal.
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Connect the R terminal 15 to the Mixing Expansion
Module R terminal.
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Auxiliary Pump 3 to Mixing Expansion Modules Terminals 12, 14, 15
Connect the Aux Pmp 3 terminal 12 to the tN4 Thermostat
W terminal.
Connect the C terminal 14 to the tN4 Thermostat C
terminal.
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Connect the R terminal 15 to the tN4 Thermostat R
terminal.
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Auxiliary Pump 3 to tN4 Thermostats Terminals 12, 14, 15
Connect the Aux Pmp 3 terminal 12 to the tN4 Setpoint
Control R1 terminal.
Connect the C terminal 14 to the tN4 Setpoint Control
C terminal.
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Connect the R terminal 15 to the tN4 Setpoint Control
R terminal.
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Auxiliary Pump 3 to tN4 Setpoint Controls Terminals 12, 14, 15
Wiring the Input Power Terminals 23, 24, 27, 28
Provide a 15 Amp circuit for the input power.
Connect the 115 V (ac) line wire (L) to terminal 23.
Connect the neutral wire (N) to terminal 24.
Connect the ground wire (G) to one of the ground screws
provided in the wiring chamber.
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If using Auxiliary Pump Outputs 2 and 3, either provide
a 15 Amp circuit for the relay power, or share the same
circuit as the input.
If separate power is used for the Relay Power:
Connect 115 V line in (L) to the Relay Power L terminal 27.
Connect a neutral to the Relay Power N terminal 28.
Connect the ground wire to one of the grounding screws
provided in the wiring chamber.
If shared power is used for the Relay Power:
Connect 115 V line in (L) to terminal 27 using a jumper
wire from terminal 23.
Connect a neutral (N) to terminal 28 using a jumper wire
from terminal 24.
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N
G
L
23 24
Input Power
L N
27 28
Relay Power
L N
115 V (ac)
Shared power for Zone Pumps
N
G
L
N
G
L
23 24
Input Power
L N
27 28
Relay Power
L N
Separate power for Zone Pumps
115 V (ac)
N
G
L
23 24
Input Power
L N
115 V (ac)
Wiring the Relay Power Terminals 27, 28
Note: Installations up to 104°F (40°C) only require 90°C
supply wiring, whereas environments of 105 to 117°F (41 to
47°C) require 105°C rated wiring.