background image

© 2018 tekmar  304P_D - 12/18

3 of 12

Preparation

Tools Required

 -----------------------------------------------------------------------------------------

 -----------------------------------------------------------------------------------------

•  tekmar or jeweler screwdriver
•  Phillips head screwdriver

• Needle-nose pliers
• Wire stripper

Materials Required

 -------------------------------------------------------------------------------------

 -------------------------------------------------------------------------------------

Packaging Contents

 ------------------------------------------------------------------------------------

 ------------------------------------------------------------------------------------

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

•  Four 1/8" - 1" wood screws

Installation

•  1 Switching Relay 304P
•  2 Spare fuses (located in cover)

•  1 Installation and Operation Manual 304P_D

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 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 exi-
gences du Règlement sur le matériel brouilleur du Canada.

 Radio Frequency Interference 

Location

•  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.

Installing the Enclosure

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 304P

Page 1: ...d Introduction The Switching Relay 304P connects up to four thermostats and operates circulators to provide heating to a zoned hydronic heating system Zone 1 has optional priority over zones 2 through...

Page 2: ...ided 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 product la...

Page 3: ...the control to a different circuit from that to which the receiver is connected Cet appareil num rique de la classe B respecte toutes les exi gences du R glement sur le mat riel brouilleur du Canada...

Page 4: ...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 10V RESERVED FUSE 1 120 VAC POWER MOD X X tN4 POWER ROOM RESPONSE T...

Page 5: ...4 PUMP 5 PUMP 6 L N L N L N L N L N L N L N tN4 A C R W tN4 A C R W T STAT 4 tN4 A C R W T STAT 5 tN4 A C R W T STAT 6 EXPANSION tN4 A C R W tN4 A B C D E T T DHW B1 A1 T1 P1 L N P2 P3 P4 T2 T3 A1 DHW...

Page 6: ...TAT 3 PRIORITY PUMP 1 PUMP 2 PUMP 3 PUMP 4 PUMP 5 PUMP 6 L N L N L N L N L N L N L N tN4 A C R W tN4 A C R W T STAT 4 tN4 A C R W T STAT 5 tN4 A C R W T STAT 6 EXPANSION tN4 A C R W tN4 A B C D E T T...

Page 7: ...ntrol zones are able to turn back on This prevents building freeze up if the DHW tank aquastat fails in the closed position Exercising DIP Switch ON Each circulator pump is energized for 30 seconds ev...

Page 8: ...trols set as the 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 Setting the Max Mod Dial Boiler Make Model Required Adapter Supplied by boiler manufacturer...

Page 9: ...point Source 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...

Page 10: ...eter to ACTIVE Set BMS Type to SETPOINT Enter boiler password Set Parameter Setpoint source to 4 20mA Enter boiler password Set Parameter Setpoint source to 4 20mA Lochinvar Knight Lochinvar FTXL NTI...

Page 11: ...2 Volts For Min to 2 V Set Local Priority 2 Volts For Max to 10 V Install the OpenTherm Module as per the boiler manufac turer s instructions Raypak MVB or XTherm Raypak XFyre or XPakFT 304P 304P J2...

Page 12: ...nsibility and obligation Purchaser shall indemnify and hold tekmar harmless from and against any and all claims liabilities and damages of any kind or nature which arise out of or are related to any s...

Reviews: