tekmar 401 House Control Installation - Manual (Page 4)

© 2011 D 401 - 07/11 4 of 28
Zone 4
Zone 3
Power
Source
DHW
Zone 2 Zone 1
The control requires an external transformer with 20 VA
capacity or greater. A tekmar Transformer 009 (or 009K
which includes a 4” x 4” electrical box) can supply up to 40 VA, and includes an in-line fuse to protect the transformer
and control.
Sizing the Transformer
Control Wiring
Line Voltage Wiring----------------------------------------------------------------------------------- -----------------------------------------------------------------------------------
CAUTION: TURN ALL POWER OFF BEFORE PERFORMING ANY WIRING.
Each cable must be pulled from the equipment to the
control’s plastic enclosure. All low voltage wiring connections
enter the enclosure through conduit knockouts on the
sides, or through the square knockouts on the rear. It is
recommended to label each cable for easy identification.
All low voltage wires are to be stripped to a length of 3/8”
(9 mm) to ensure proper connection to the control.
Pull two conductor 18 AWG LVT cable, up to 500 feet
(150 m) for the following equipment:
tekmarNet ® 2 Thermostats
Boiler Stage 1 T-T
•
•
Boiler Stage 2 T-T (if applicable)
Modulating Boiler 0-10 V (dc) or 4-20 mA (if applicable)
Outdoor Temperature Sensor
Boiler Supply Temperature Sensor
DHW Tank Temperature Sensor (if applicable)
DHW Tank Aquastat (if applicable)
Setpoint Device (if applicable)
Pull three conductor 18 AWG LVT cable for the following
equipment:
tekmarNet ® 4 Accessories (User Switch, Timer)
•
•
•
•
•
•
•
•
Low Voltage Wiring ----------------------------------------------------------------------------------- -----------------------------------------------------------------------------------
Ground the Pumps
Connect the pump grounds to the power supply
ground as shown in Figure 1. The ground wire must
also be grounded to the electrical box.
Wire the Pump Neutrals
Connect the Neutral (N) wires from each pump and wire
to the 115 V (ac) Neutral (N) wire. If the transformer has
been mounted to this electrical box, connect its neutral
wire with this group. This is shown in Figure 2.
•
•
Wire the Pump Power (L)
Connect the 115 V (ac) line voltage (L) wire to the red
Pump Power (L) wire on the back of the House Control
and to the 115 V (ac) side of the transformer. Use a
wire nut or approved connector. See Figure 3.
Wire the Pumps
Wire each remaining line voltage pump wire into the
push-in wire connector of the corresponding pump
lead on the back of the House Control. This is shown
in Figure 4.
•
•
401
Zone 4 Zone 3
Zone 2
Zone 1 DHW Pump
Pump Power
Strip wires 1/2 inch
(13 mm). Installed
wires are not removable.
12-18 AWG
Zone 4
Power
Source
(L,N)
DHW
Zone 2 Zone 1
Zone 3
Pump
Leads
Zone 4
Zone 3
Power
Source
(L,N)
DHW
Zone 2 Zone 1
Figure 1 - Connect
Ground Wires
401
Zone 4 Zone 3
Zone 2
Zone 1 DHW Pump
Pump Power
Strip wires 1/2 inch
(13 mm). Installed
wires are not removable.
12-18 AWG
Zone 3
Power
Source
(L,N)
DHW
Zone 2 Zone 1
Zone 4
Figure 2 - Connect
Neutral Wires
Figure 3 - Connect
Line Voltage (Hot)
Figure 4 - Connect
Pump Line (Hot)