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 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 RoomResponse™ signal to modulating-condensing boilers to optimize comfort while improving boiler efficiency.
- Submittal Sheet
- Installation
Features
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Away signal shared between tekmar thermostats
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CSA approved
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Compatible with all low voltage thermostats
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Four ground screws
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Fuses protect transformers and pumps
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LED for each zone, priority, end switch and RoomResponse™
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Post purge
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Priority override
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Pump exercising
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RoomResponse™ signal
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Top, bottom and back conduit knockouts
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Two spare fuses included
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Unlimited zone expansion
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Zone priority
Specifications
| Control | Microprocessor control. This is not a safety (limit) control. |
| Packaged weight | 5.0 lb. (2250 g) |
| Dimensions | 8-3/16″ H x 10-11/16″ W x 2-3/8″ D (208 x 271 x 60 mm) |
| Enclosure | Cover: ABS plastic, Base: galvanized steel, NEMA type 1 |
| Approvals | CSA C US |
| Ambient conditions | Indoor use only, 32 to 122°F (0 to 50°C), RH ≤90% non-condensing |
| Power supply | 115 V (ac) ±10%, 60 Hz, 17.3 A |
| Transformer | 40 VA at 24 V (ac), expandable to 80 VA with additional transformer M3069 (sold separately) |
| Fuses | T5A 250 V slow blow, two spare fuses included |
| Control load | 7 VA at 24 V (ac) |
| Pump relays | 115 V (ac), 5 A, 1/3 hp, 17.3 A combined |
| Boiler XX end switch | 24 V (ac), 5 A |
| DHW end switch | 24 V (ac), 5 A |
| Mod boiler output | 0-10 V (dc) 500 Ω min load impedance |
| 4-20 mA 1 kΩ max load impedance | |
| Warranty | Limited 3 Year Warranty |
Speedy Shipping and Professional Packaging
Due to our long-term partnership in a long-standing partnership with UPS, FedEx, DHL as well as a range of other leading global carriers, we can offer a variety of shipping options. Our warehouse staff is highly educated and will package your goods in accordance with our exact and precise specifications. Your items are carefully inspected and properly secured before shipping. Everyday, we send to thousands of customers across many countries. Our commitment to become the biggest online retailer worldwide is demonstrated by this. The warehouses are located in Europe as much as they are in USA.
Note: Orders that contain more than one item are assigned a processing period depending on the item.
We will inspect each and every one of the products before they are shipped. Today, the majority of orders will be shipped within 48 hours. Delivery is expected to take between 3 and seven days.
Returns
We don't manage the stock in our factory and warehouse. Actual stock levels may fluctuate at any time. It is possible that your order will be out of stock once the order has been placed.
Our policy lasts 30 days. Unfortunately, if 30 days have passed since you purchased your item, we will not be able to give you a refund or exchange.
The item you purchase must be in its original packaging and in good condition. It must also not be used. The item must be in its original packaging.
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