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Radio Frequency Interference

Installation

The installer must ensure that this control and its wiring 
are isolated and/or shielded from strong sources of elec-
tromagnetic noise. Conversely, this Class B digital appa-
ratus 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 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.

Tools Required

Materials Required

Packaging Contents

Location

Installing the Enclosure

•  tekmar or jeweler screwdriver
•  Phillips head screwdriver

•  Needle-nose pliers
•  Wire stripper

•  18 AWG LVT solid wire (low-voltage connections)
•  14 AWG solid wire (line-voltage connections)

•  Four 1/8” - 1” wood screws

•  1 Switching Relay 302P
•  2 Spare fuses (located in cover)

•  Installation Manual 302P_D

•  Keep the control dry. Avoid potential leakage onto the control.
•  Maintain relative humidity less than 90% in a non-condensing environment.
•  Avoid exposure to extreme temperatures beyond 32-122°F (0-50°C).
•  Install away from equipment, appliances, or other sources of electrical interference.
•  Install to allow easy access for wiring, viewing, and adjusting the display screen.
•  Install approximately 5 feet (1.5 m) off the finished floor.
•  Locate the control near pumps if possible.
•  Provide a solid backing which the enclosure can be mounted to. Example: plywood or wall studs.
•  Use the conduit knockouts provided on the upper, lower, and back of the enclosure for wiring.

To prevent the risk of personal injury and/or 
death, make sure power is not applied to the 
control until it is fully installed and ready for 
final testing. All work must be done with power 
to the circuit being worked on turned off.
Please be aware local codes may require 
this control to be installed or connected by 
an electrician.

Summary of Contents for Tekmar Switching Relay 302P Series

Page 1: ...ing to a zoned hydronic heating system RoomResponseTM signal Compatible with all low voltage thermostats Unlimited zone expansion Zone priority Priority override Pump exercising Post purge Away signal...

Page 2: ...if not avoided could result in minor or moderate injury This symbol identifies practices actions or failure to act which could result in property damage or damage to the equipment Read manual and all...

Page 3: ...crewdriver Needle nose pliers Wire stripper 18 AWG LVT solid wire low voltage connections 14 AWG solid wire line voltage connections Four 1 8 1 wood screws 1 Switching Relay 302P 2 Spare fuses located...

Page 4: ...able Away C R Rh W R W 70 FUSE 2 FUSE 7 FUSE 8 FUSE 3 FUSE 4 FUSE 5 FUSE 6 70 80 90 60 50 100 MOD MAX MASTER MEMBER OFF OFF OFF 4 20 mA T STAT 1 PRIORITY 0N EXERCISING ON POST PURGE ON MOD BOILER 0 10...

Page 5: ...t required Away C R Rh W 70 FUSE 2 FUSE 7 FUSE 8 FUSE 3 FUSE 4 FUSE 5 FUSE 6 70 80 90 60 50 100 MOD MAX MASTER MEMBER OFF OFF OFF 4 20 mA T STAT 1 PRIORITY 0N EXERCISING ON POST PURGE ON MOD BOILER 0...

Page 6: ...0V RESERVED FUSE 1 120 VAC POWER MOD X X tN4 POWER ROOM RESPONSE T1 T2 T3 T4 T5 T6 A DHW C R W BOILER T STAT 1 T STAT 2 T STAT 3 PRIORITY PUMP 1 PUMP 2 PUMP 3 PUMP 4 PUMP 5 PUMP 6 L N L N L N L N L N...

Page 7: ...Switching Relay set to Master When using multiple Switching Relays and or Zone Valve Controls set one control to Master and set all other controls to Member The boiler end switch XX only closes when t...

Page 8: ...Master Mod Max Max Voltage Max mA 50 5 12 60 6 13 6 70 7 15 2 80 8 16 8 90 9 18 4 100 10 20 FUSE 6 70 80 90 60 50 100 MOD MAX Mod Max dial set to 100 in the illustration Boiler Make Model Required Ad...

Page 9: ...Change Energy Management setting Central Heat Modulation Source to 4 20 mA Change Energy Management setting Central Heat 4 20 mA Setup 4 mA Water Temperature to 80 F 26 5 C 9 10 22 23 5 6 16 17 2 U 1...

Page 10: ...tpoint source to 4 20mA Enter boiler password Set Parameter Setpoint source to 4 20mA Lochinvar Knight Lochinvar FTXL NTI Trinity LX Riverside HeatStation NTI Trinity Fire Tube 302P 302P 302P 302P 302...

Page 11: ...P 302P 302P 1 4 1 2 5 6 Connect to the Viessmann Extension Module EA1 Plug 0 10V Switching Relay 302P Two Zones with Priority Literature Submittal 302P_C Installation Manual 302P_D Job Record 302P_J P...

Page 12: ...made by Pur chaser to its customers which are different from or in excess of the tekmar Limited Warranty are the Purchaser s sole responsibility and obligation Purchaser shall indemnify and hold tekma...

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