Tekmar D 315, tekmarNet4 315 User Manual
Installation & Operation Manual
tN4 Wiring Center 315
Introduction
The tekmarNet®4 (tN4) Wiring Center 315 is designed to
operate up to six zone valves in a hydronic heating system.
It can be mounted near a remote zone manifold, providing a
convenient location to wire both thermostats and zone valves
while only requiring two wires to be run back to the mechanical
room. When combined with tekmarNet®4 Thermostats, all
devices communicate to provide a synchronized end switch
that reduces cycling of equipment. A zone group pump
relay is also available to switch a pump.
Zone 1
Power
Zone 2
End Switch/ Zone Group Pump
Zone 3
Zone 4
Zone 5
Zone 6
Zoning
Replaces: 04/09
Features
Six 24 V (ac) powered zone outputs
•
For use with tekmarNet
•
tN4 expansion terminals
•
Isolated end switch
•
Zone group pump relay
•
External diagnostic LEDs
•
CSA C US Certified for use in USA and Canada
•
®
4 Thermostats
D 315
04/11
tN4 Wiring Center 315
Six Zone Valves
Benefi ts
Simple, convenient wiring location
•
Compact enclosure for flexible installation
•
Reduce equipment cycling when combined with
•
tekmarNet®4 Thermostats
Note
Not for use with tekmarNet®2 Thermostats•
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Table of Contents
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Installation ...................................................................... 2
Preparation ................................................................. 2
Physical Dimensions ..................................................3
Installation Location ...................................................3
Rough-In Wiring .........................................................3
Sizing the Transformer ...............................................4
Control Wiring ............................................................4
Testing the Control Wiring ..........................................6
Applic ations .................................................................... 7
User Interface ............................................................... 10
LEDs ........................................................................10
Sequence of Operation ................................................10
tekmarNet® System ..................................................10
Relay Outputs ........................................................... 11
Energy Saving Features ........................................... 11
Troubleshooting ............................................................ 11
Frequently Asked Questions .................................... 11
Technical Data ..............................................................12
Limited Warranty and Product Return Procedure ........12
Getting Started
Congratulations on the purchase of your new tekmarNet
This manual covers the complete installation, programming and sequence of operation for this control. You will also find
instruction on testing, commissioning, and troubleshooting the control and system that it operates.
®
Wiring Center!
Installation
Caution
Improper installation and operation of this control could
result in damage to the equipment and possibly even
personal injury or death. It is your responsibility to ensure
that this control is safely installed according to all applicable
codes and standards. This electronic control is not intended
for use as a primary limit control. Other controls that are
intended and certified as safety limits must be placed into
the control circuit. Do not attempt to service the control.
Refer to qualified personnel for servicing. There are no
user serviceable parts. Attempting to do so voids warranty
and could result in damage to the equipment and possibly
even personal injury or death.
Radio Frequency Interference
The installer must ensure that this control and its wiring are
isolated and/or shielded from strong sources of electromagnetic
noise. Conversely, this Class B digital apparatus complies
with Part 15 of the FCC Rules and meets all requirements of
the Canadian Interference-Causing Equipment Regulations.
However, if this control does cause harmful interference
to radio or television reception, which is determined by
turning the control off and on, the user is encouraged to try
Preparation
Tools Required
tekmar or jeweller screwdriver
•
Phillips head screwdriver
•
Materials Required
(2) #10 x 1” wood screws
•
(2) wire nuts
•
18 AWG LVT solid wire (low voltage connections)
•
Power Required
120 V (ac), 1-phase, 15 A service from circuit breaker
• Power disconnect (optional)•
panel
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to correct the interference by re-orientating or relocating
the receiving antenna, relocating the receiver with respect
to this control, and/or connecting the control to a different
circuit from that to which the receiver is connected.
Cet appareil numérique de la classe B respecte toutes
les exigences du Règlement sur le matériel brouilleur du
Canada.
Needle-nose pliers
•
Wire stripper
•
14 AWG solid wire (line voltage connections)
•
tekmar 009 (24 V (ac) transformer)
•
Cable or conduit connectors
•
© 2011 D 315 - 04/11 2 of 12
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Physical Dimensions
5–1/2”
(140 mm)
Front View
7/8”
C
Zone 2
W tN4CtN4CX
Zone 1
Zone 1 Expansion
Zone 2
Zone 3
Zone 4
Zone 5
Zone 6
End Switch
XC
Input Power
RR
tN4 Wiring Center 315
Six Zone Valves
Zone 1
Zone 2
VlvC
C
WtN4 R
Zone 3
Power
End Switch/ Zone Group Pump
Zone 3
Zone 4
VlvC
VlvC
WtN4 R C
VlvC
WtN4 R
H8001B
Zone 4
Zone 5
RWtN4C
WtN4C
Zone 6
R
Zone 5
Zone 6
(75°C) conductors
Use at least 167°F
VlvC
VlvC
Side View Back View
(22 mm)
CL
1–1/8” (30 mm)
5–1/2”
(140 mm)
Installation Location
When choosing the location for the control, consider the
•
following:
Keep dry. Avoid potential leakage onto the control.
•
RH 90% to 122°F (50°C) in a non-condensing
environment.
Do not expose to operating temperatures beyond 32-
•
122°F (0-50°C).
Provide adequate ventilation.
•
Keep away from equipment, appliances or other sources
•
of electrical interference.
2–1/4”
(57 mm)
1/2” Knock-out (x 4)
315
Strip wires1/2 inch (13 mm).
Installed wires are not removable.
12-18 AWG
7/8” x 1/2” (23 mm x 12 mm)
Knock-out (x 4)
1/2” x 5/8”
(12 mm x 16 mm)
Zone Power L
Ø 1/8” (3 mm)
Zone Group Pump
Knock-out (x 4)
Locate the control near zone valves if possible.
•
Provide easy access for wiring and viewing the
•
control.
Mount approximately 5 ft. (1.5 m) off the finished floor.
•
Install to wall using #10 x 1” wood screws. Wall anchors
•
are recommended when mounting to sheet rock, wallboard or masonry.
Rough-In Wiring
Line Voltage Wiring
In most cases, the control can be mounted directly to a wall
without the need for any line voltage connections.
As an option, the control may be mounted to a 4” x 4”
electrical junction box so that the high voltage electrical
connections for the transformer are safely contained.
For ease of service, the circuit breaker or power disconnect
should be located in reasonably close proximity to the
equipment.
All line voltage wire connections are recommended to
be pulled inside a flexible or solid conduit. Always follow
proper wiring practices, building and electrical codes for
your jurisdiction.
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Each cable must be pulled to the electrical junction box. It
is recommended to label each cable for easy identification.
All line voltage wires should be stripped to a length of 1/2”
(13 mm).
Pull a three conductor 14 AWG cable for the following
equipment:
Circuit Breaker or Power Disconnect (if applicable)
•
Zone Group Pump (if applicable)
•
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Low Voltage Wiring
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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®4 Expansion (if applicable)
•
24 V (ac) Power
•
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Sizing the Transformer
•
Zone Valves
•
Boiler T-T (If using End Switch)
Pull three conductor 18 AWG LVT cable, up to 500 feet
(150 m) for the following equipment:
tekmarNet
•
Pull four conductor 18 AWG LVT cable, up to 500 feet
(150 m) for the following equipment:
•
tekmarNet
®
4 Accessories (User Switch, Timer)
®
4 Thermostats
The control requires an external transformer. 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.
In order to correctly size the external transformer, all loads
connected to the control must be taken into account.
When adding up the loads, consider the following:
tekmarNet®4 Thermostats draw approximately 2 VA each.
•
Each zone valve must be sized for peak load. This can be
•
obtained by multiplying the peak current draw (in Amps)
by 24 V (ac).
Zone
Thermostat Load
Zone Valve Load
Total Zone Load
123456
++++++
The total power capacity of the power supply should be
larger than the total load of all the devices connected to
the control. This total load must not exceed 98 VA. Multiple
tekmar Transformer 009’s can be wired together to increase
total VA capacity.
The following chart is provided to simplify transformer
sizing:
Control Wiring
Line Voltage Wiring
CAUTION: TURN ALL POWER OFF BEFORE PERFORMING ANY WIRING.
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Control
Load (VA)
3
Transformer
must exceed:
VA
Wire the Grounds
Connect the power supply ground and zone group pump
•
ground to the electrical box as shown in Figure 1.
Wire the Neutrals (N)
Connect the 115 V (ac) neutral (N) and zone group pump
•
neutral wires to the 115 V (ac) side of the transformer. Use
a wire nut or approved connector. See Figure 1.
Wire the Power (L)
Connect the 115 V (ac) line voltage (L) wire to the 115 V
•
(ac) side of the transformer and to the Power L wire (red)
of the zone group pump relay. Use a wire nut or approved
connector. See Figure 1.
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Wire the Zone Group Pump (L)
Connect the 115 V (ac) line voltage (L) wire from the
•
zone group pump to the Zone Group Pump push-in wire
connector. See Figure 1.
If the zone group pump is not used, then cut the rear red
•
and black wires where they exit the enclosure.
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