Tekmar 304P, 306P Installation & Operation Manual
Installation & Operation Manual
304P_D
Switching Relay 304P
Zoning
12/18
Replaces: 11/16
Introduction
The Switching Relay
heating system. Zone 1 has optional priority over zones 2 through 4 and can be used to provide heat to an indirect
domestic hot water tank. The 304P includes optional exercising to prevent circulator seizure when not in use, and optional
post purge operation of the last operating zone to maximize energy savings. The 304P provides a RoomResponseTM
signal to modulating-condensing boilers to optimize comfort while improving boiler efficiency.
304
P connects up to four thermostats and operates circulators to provide heating to a zoned hydronic
Features
• RoomResponseTM signal
• Compatible with all low voltage thermostats
• Unlimited zone expansion
• Zone priority
• Priority override
• Pump exercising
• Post purge
•
LED for each zone, priority, end switch and RoomResponse
• Away signal shared between tekmar thermostats
• Four ground screws
• Top, bottom and back conduit knockouts
• Fuses protect transformers and pumps
• Two spare fuses included
• CSA approved
TM
Switching Relay 304P
Four Zones with Priority
Power
Priority
RoomResponse
TM
Zone 1 Zone 2 Zone 3 Zone 4
H3020A
© 2018 tekmar 304P_D - 12/18
Table of Contents
Important Safety Information .............................................2
Installation .........................................................................3
Preparation .................................................................... 3
Location ......................................................................... 3
Installing the Enclosure ................................................. 3
Application 304P–1 ........................................................ 4
Application 304P–2 ....................................................... 5
Application 304P–3 ....................................................... 6
User Interface ....................................................................7
Indicator LED ................................................................. 7
Sequence of Operation .....................................................7
Technical Data ..................................................................12
Limited Warranty and Product Return Procedure ............12
Important Safety Information
It is your responsibility to ensure that this control is safely installed according to all applicable codes and standards. tekmar is
not responsible for damages resulting from improper installation and/or maintenance.
This is a safety-alert symbol. The safety alert symbol is shown alone or used with a signal word (DANGER,
WARNING, or CAUTION), a pictorial and/or a safety message to identify hazards. When you see this symbol
alone or with a signal word on your equipment or in this manual, be alert to the potential for death or serious
personal injury.
This pictorial alerts you to electricity, electrocution, and shock hazards.
This symbol identifies hazards which, if not avoided, could result in death or serious injury.
This symbol identifies hazards which, 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 product labels BEFORE using the equipment. Do not use unless you know
the safe and proper operation of this equipment. Keep this manual available for easy access by all
users. Replacement manuals are available at tekmarControls.com
•
It is the installer’s responsibility to ensure that this control is safely installed according to all applicable codes and
standards.
•
Improper installation and operation of this control could result in damage to the equipment and possibly even personal
injury or death.
• This 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.
The control includes fuses and transformer that are serviceable. Do not attempt to service any other parts on the control.
Attempting to service the control voids the warranty.
• Strip all wiring to a length of 3/8 in. or 10 mm for all terminals.
• A circuit breaker or power disconnect that provides power to the control should be located nearby and clearly labeled.
• Refer to the current and voltage ratings at the back of this manual before connecting devices to this control.
© 2018 tekmar 304P_D - 12/18
2 of 12
-----------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------
------------------------------------------------------------------------------------
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
Installation
Preparation
Tools R equir ed
• tekmar or jeweler screwdriver
• Phillips head screwdriver
Materials Required
• 18 AWG LVT solid wire (low-voltage connections)
• 14 AWG solid wire (line-voltage connections)
Packaging Contents
• 1 Switching Relay 304P
• 2 Spare fuses (located in cover)
-----------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------
------------------------------------------------------------------------------------
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.
• Needle-nose pliers
• Wire stripper
• Four 1/8" - 1" wood screws
• 1 Installation and Operation Manual 304P_D
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.
3 of 12
© 2018 tekmar 304P_D - 12/18
Application 304P–1
---------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------
The Switching Relay 304P operates the circulators for four heating zones when the corresponding thermostat calls for heat.
The boiler is fired whenever a zone calls for heat.
Mechanical
---------------------------------------------------------------------------------------------
Legend
B1 = Boiler
P1 to P4 = Zone 1 through 4 Pumps
T1 = WiFi Thermostat 561 or 562
T2 = Thermostat 518 or 519
T3 = Generic Digital Power-Stealing Thermostat
T4 = Generic Bi-Metallic Strip Thermostat
B1
304P
P1
P2 P3 P4
Electrical
B1
-----------------------------------------------------------------------------------------------
T1
T2 T3 T4
70
Away C R Rh W Away C R Rh W
R W R W
DIP Switches
Master
T-stat 1 Priority Off
Exercising On
Post Purge On
Mod Boiler - not applicable
-
+
XX
MOD
POWER ROOM
A
DHW C R W
tN4
BOILER T-STAT 1 T-STAT 2 T-STAT 3
RESPONSE
FUSE 1
120 VAC
POWER
L
A
tN4
T1 T2 T3 T4 T5 T6
FUSE 7
FUSE 8
FUSE 2
PRIORITY
PUMP 1
NLNLNL N LNL NLN
A
CRW
tN4
FUSE 3 FUSE 4 FUSE 5
PUMP 2 PUMP 3 PUMP 4 PUMP 5 PUMP 6
CRW
A
tN4
T-STAT 4
CRW
A
tN4
T-STAT 5
CRW
A
CRW
tN4
T-STAT 6 EXPANSION
A
BCDE
tN4
MASTER MEMBER
T-STAT 1 PRIORITY : 0N
EXERCISING : ON
POST PURGE : ON
MOD BOILER : 0-10V
RESERVED
50 100
MOD MAX %
FUSE 6
70 80
OFF
OFF
OFF
4-20 mA
9060
LN
© 2018 tekmar 304P_D - 12/18
P1 P2 P3 P4
4 of 12
Loading...