THERMO 2000 VoltMax SCR VOLTSCR20850P1 Commercial Electric Boiler | 49.5 kW - 208V 1 Phase

A 49.5 kW electric boiler that modulates its output from 0 to 100%, for buildings with a 208 V supply

What the VoltMax 50 is and who it suits

The VoltMax SCR is Thermo 2000’s commercial electric boiler. The VoltMax 50 size, on 208 V single phase, delivers 49.5 kW to a hot-water loop: radiant floors, radiators, the coils of a hydro-air system or an indirect water heater. It suits apartment buildings, commercial spaces and institutional buildings that heat with water and have a 208 V electrical supply.

What sets it apart is in the three letters of its name. A solid-state relay (SCR) varies output from 0 to 100% instead of simply switching elements on and off. According to Thermo 2000, this modulation limits the boiler’s peak power demand. Relay stages complement the solid-state relay, and the controller rotates the order in which they work.

What to plan for in a 208 V building

The VoltMax 50 name rounds the output: the manufacturer’s documentation lists 49.5 kW at 208 V. For this size, Thermo 2000 also publishes a current of 238.4 A. That is the first value we compare with the capacity of the electrical service, before recommending this model rather than a neighbouring size in the series, such as the 45 kW or the 54 kW VoltMax.

The boiler is vertical and compact. Thermo 2000 requires 3 in of clearance on the sides and back, 24 in at the front and 32 in above, and it can sit directly on the floor. It weighs 310 lb (141 kg) and holds 11 US gal of water. Its four 1 1/2 in male NPT side connections tie into the existing loop.

The Incoloy immersion elements can be replaced one by one: 6 elements of 5 kW and 6 of 6 kW. The manufacturer describes the unit as quiet, clean and low-maintenance.

A controller built for building management

The Schneider Electric controller shows its data on a 3 in backlit display, in French or English, with alarm codes. The outdoor sensor is included: water temperature follows the weather, which avoids running the loop at full output in mild weather. The Ethernet port gives access to a web page and sends alarms by email. The controller communicates over BACnet IP or MS-TP with a building management system, accepts a 0-10 Vdc signal for setpoint or output, and handles schedules. A contact controls the pump, with or without domestic hot water priority, and a second setpoint serves an indirect water heater.

What AirGreen’s installation covers

Everything starts with a free on-site estimate. We look at the hot-water loop, the mechanical room, the electrical service and the unit being replaced. You then receive a written quote that specifies the circulator and expansion tank, which are not on the list of supplied parts, as well as the low water cut-off, offered as an option on this size.

On installation day, our technicians set the boiler in place, connect it to the loop, extend the discharge of the factory-installed relief valve and make the electrical connection. They mount the outdoor sensor, fill and purge the system, then set the setpoint and schedules with you. AirGreen is a family business established in Montreal for more than fifteen years, holding RBQ licence 5645-9605-01 in ventilation, refrigeration and electrical work. Thermo 2000 covers the tank for 10 years (limited warranty, closed-loop heating) and the electrical and mechanical components for 2 years.

Let’s talk about your building

We install the VoltMax SCR in Montreal, Laval, Longueuil, on the North Shore and on the South Shore. Ask for your free estimate: you receive a detailed written quote, and financing is available so you can go ahead without waiting.