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Switching Relay 302P
The Switching Relay 302P connects up to two thermostats and operates circulators to provide heating to a zoned
hydronic heating system.
Features
• RoomResponse
signal
TM
• Compatible with all low voltage thermostats
• Unlimited zone expansion
• Zone priority
• Priority override
• Pump exercising
• Post purge
• Away signal shared between tekmar thermostats
Switching Relay 302P
Two Zones with Priority
• LED for each zone, priority, end switch and
• Four ground screws
• Top, bottom and back conduit knockouts
• Fuses protect transformers and pumps
• Two spare fuses included
• CSA approved
Power
RoomResponse
TM
Zone 1
Zone 2
Priority
RoomResponse
TM
Installation Manual
H3024A
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Table of Contents
Related Manuals for Watts Tekmar Switching Relay 302P Series
Summary of Contents for Watts Tekmar Switching Relay 302P Series
- Page 1 Installation Manual Switching Relay 302P The Switching Relay 302P connects up to two thermostats and operates circulators to provide heating to a zoned hydronic heating system. Features • RoomResponse signal • LED for each zone, priority, end switch and RoomResponse •...
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Page 2: Table Of Contents
Table of Contents Important Safety Information ......... 2 Application 302P-1 ............ 4 Application 302P-2 ............ 5 Installation ..............3 Application 302P-3 ............ 6 Packaging Contents ........... 3 Tools Required ............3 User Interface ..............7 Materials Required ............. 3 Indicator LED ............. 7 Location .............. -
Page 3: Installation
Radio Frequency Interference The installer must ensure that this control and its wiring the user is encouraged to try to correct the interference are isolated and/or shielded from strong sources of elec- by re-orientating or relocating the receiving antenna, tromagnetic noise. Conversely, this Class B digital appa- relocating the receiver with respect to this control, and/ ratus complies with Part 15 of the FCC Rules and meets or connecting the control to a different circuit from that... -
Page 4: Application 302P-1
Application 302P-1 The Switching Relay 302P operates the circulators for two heating zones when the corresponding thermostat calls for heat. The boiler is fired whenever a zone calls for heat. Mechanical Legend 302P B1 = Boiler P1, P2 = Zone 1 and 2 Pumps T1 = WiFi Thermostat 561, 562 or 563 T2 = Generic Digital Power-Stealing Thermostat Electrical... -
Page 5: Application 302P-2
Application 302P-2 The Switching Relay 302P operates two heating zone circulators when the corresponding thermostat calls for heat. Zone 1 heats a domestic hot water tank. When priority is selected, zone 2 shuts off when zone 1 is heating. The boiler is fired when there is a call for heat. -
Page 6: Application 302P-3
Application 302P-3 Two Switching Relay’s operate six heating zone circulators. The two controls are connected together using an expansion bus wire. The master 302P fires the boiler when any zone calls for heat. If priority is selected, zones 2 through 6 shut off when zone 1 is calling for heat. -
Page 7: User Interface
User Interface - Indicator LED Power Zone 1 • On when 115 V (ac) is applied. • On when thermostat 1 calls for heat. • Off when power disconnected or transformer fuse is Zones 2 blown. • On when thermostat 2 calls for heat. Priority •... - Page 8 RoomResponse Signal 70 80 The RoomResponse signal adjusts the temperature of a modulating condensing boiler that accepts a 0-10 V(dc) or 4-20 mA input. It works by continually adjusting boiler water temperatures to the lowest possible value to meet comfort without wasting energy. This is done by monitoring each thermostat's on and off time pattern and determines the ideal water temperature for each zone.
- Page 9 Aerco AM Series Camus Modulating MicoFlame – – – – 302P Aerco AM 302P Camus Micoflame • No changes to the boiler are required. • Change control to mode 6 in the control parameters. Bosch Greenstar Heat Transfer Products Elite –...
- Page 10 Laars Mascot FT Peerless Pinnacle PF-200, 210, 300, 399 – – – – – 302P Laars Mascot FT 302P Peerless • No changes to the boiler are required. Peerless Pinnacle Peerless PFA-1 Pinnacle Terminal Interface Adapter Lochinvar Knight Control Strip Board •...
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Page 11: Technical Data
Raypak XFyre and XPakFT Viessmann Vitodens 200-W, B2HP and Vitocrossal 300 CU3A – – – – 9 10 Viessmann 302P Extension Module EA1 Raypak XFyre or XPakFT 302P Plug 0-10V • Connect to the Viessmann Extension Module EA1 • Set boiler PIM DIP switch 2 to Down. Plug 0-10V. -
Page 12: Limited Warranty And Product Return Procedure
Warranty Limited Warranty The liability of tekmar under this warranty is tekmar Limited Warranty are the Purchaser’s sole responsibility and limited. The Purchaser, by taking receipt of any tekmar product obligation. Purchaser shall indemnify and hold tekmar harmless from (“Product”), acknowledges the terms of the Limited Warranty in and against any and all claims, liabilities and damages of any kind or effect at the time of such Product sale and acknowledges that it nature which arise out of or are related to any such representations or...