THERMO 2000 VoltMax SCR VOLTSCR480150P3 Commercial Electric Boiler | 150 kW - 480V 3 Phase

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Thermo 2000’s VoltMax SCR 150 is a compact, vertical 150 kW commercial electric boiler on 480 V three-phase that needs little clearance.

Model numberVOLTSCR480150P3

150 kW511,800 BTU/h
180.4 Acurrent at 480 V three-phase
0 to 100%SCR power modulation
480 V · three-phaseVertical and compactOutdoor sensor supplied
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514 316-2973 · sales@airgreen.ca

Quick facts

Model numberVOLTSCR480150P3
ManufacturerThermo 2000
Manufacturer designationVOLTMAX SCR 150-480-3 PH
Output150 kW (511,800 BTU/h)
Power supply480 V, three-phase, 60 Hz
Current180.4 A
CommunicationBACnet IP / MS-TP, Ethernet

150 kW in a vertical format, for mechanical rooms short on space

What the VoltMax SCR 150 is and who it is for

In many commercial buildings, the boiler to be replaced sits in a narrow mechanical room surrounded by piping and electrical panels. Thermo 2000’s VoltMax SCR 150 lends itself well to that setting: the manufacturer describes it as a compact, vertical boiler that needs little clearance. This 150 kW version, or 511,800 BTU/h, runs on 480 V three-phase.

It is aimed at owners and managers of commercial or industrial buildings, as well as contractors preparing a replacement. Its loop can supply radiators, hot-water baseboards, a radiant floor or hydro-air coils, and its second setpoint can serve an indirect water heater.

In a Quebec mechanical room

Take a commercial building on the South Shore with a 480 V service. There, the VoltMax SCR 150 draws 180.4 A. Thermo 2000 requires 3 in of clearance on the sides and back, 24 in in front for service and 32 in above; no clearance is required underneath. It holds 30 US gal of water (113.5 L) and connects through four 2 1/2 in male NPT side connections, while the relief valve and drain are 3/4 in female NPT.

The compact format does not make it light, though: 550 lb (250 kg). Access therefore matters as much as space, and we check it before setting the delivery date. Once in place, the boiler modulates its output from 0 to 100% with solid-state relays, accepts a setpoint from 50 °F to 200 °F and adjusts the water temperature with the supplied outdoor sensor. Its Incoloy immersion elements are replaceable, an advantage when service work happens in a confined space.

The job with AirGreen

The on-site estimate is free: we measure the mechanical room and the access path, check the electrical service and examine the loop and the emitters. The written quote that follows details the boiler, the circulating pump and the expansion tank, the last two not being among the items supplied by Thermo 2000.

On the day, our crews set the boiler in place, connect the piping and the 480 V circuit, fill and purge the loop, then set up the Schneider Electric controller: setpoint, outdoor reset curve and, if needed, a BACnet link with the building management system. On warranty, Thermo 2000 covers the tank for 10 years (limited warranty, closed-loop heating) and the electrical and mechanical components for 2 years.

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.

Request an estimate

On the South Shore, in Longueuil, Montreal, Laval or on the North Shore, we come and measure your mechanical room for free. The quote is in writing and financing is available.

01 · What it is for

Replacing a boiler in a tight mechanical room

The VoltMax SCR 150 sits 3 in from the walls on the sides and back and connects through four 2 1/2 in male NPT side connections. This version runs on 480 V three-phase.

  • Replacing a commercial electric boiler in an existing mechanical room
  • Commercial and industrial buildings on 480 V three-phase power
  • Radiators, hot-water baseboards or radiant floors, with a 50 °F to 200 °F setpoint
  • Hydro-air systems connected to a hot-water loop
3 in on the sides and backVertical, compact format: the front needs 24 in for service, the top 32 in and the floor none.
30 US gal of waterThe tank holds 30 US gal (113.5 L) and connects through four 2 1/2 in male NPT side connections.
50 °F to 200 °F setpointFrom 10 °C to 93 °C: the setpoint is adjusted to the building’s emitters, radiant floor or radiators.
02 · Specifications

Specifications

From the manufacturer’s documentation. A value the manufacturer does not publish is not listed.

ManufacturerThermo 2000
SeriesVoltMax SCR
Manufacturer designationVOLTMAX SCR 150-480-3 PH
ConfigurationB (99 to 180 kW)
TypeCommercial hot-water electric boiler, vertical
Output150 kW
Output in BTU/h511,800 BTU/h
Power supply480 VAC, 60 Hz, three-phase
Current180.4 A
ModulationSCR 0 to 100% (solid-state relay) plus relay stages
Water volume30 US gal (113.5 L)
Water connections2 1/2 in male NPT, 4 side connections
Relief valve and drain3/4 in female NPT
Max. working pressure125 psi (862 kPa), standard
Setpoint range50 °F to 200 °F (10 °C to 93 °C)
ControllerSchneider Electric, 3 in backlit LCD, alarm codes, °C/°F, French and English
Control functionsStage rotation, outdoor reset, schedules, pump contact with or without domestic hot water priority, second setpoint for an indirect water heater
External control0-10 Vdc signal (setpoint and output)
CommunicationBACnet IP / MS-TP; Ethernet port with web page and email alarms
Heating elementsImmersion type, Incoloy, replaceable
Low-water cutoffStandard (models above 60 kW)
ClearancesSides 3 in, back 3 in, front 24 in, top 32 in, floor 0
Weight550 lb (250 kg)
Manufacturer warrantyThermo 2000: 10 years on the tank (limited warranty, closed-loop heating); 2 years on electrical and mechanical components (parts and accessories)
StandardsCSA C22.2 No. 165-92, UL 834, CSA B-51-14, CRN, ASME Section IV (H)
Model numberVOLTSCR480150P3
03 · Before installing

What to know before installing

  • 480 V three-phase, 60 Hz power supply: 180.4 A. Check the service voltage; the series also comes in 600 V.
  • Weight of 550 lb (250 kg): access to the mechanical room (doors, stairs, freight elevator) is checked before delivery.
  • Clearances: 3 in on the sides and back, 24 in in front, 32 in above, none underneath.
  • Relief valve and drain in 3/4 in female NPT. The circulating pump and expansion tank are not among the items supplied by Thermo 2000.
In the box
  • Schneider Electric controller with backlit display
  • Outdoor temperature sensor
  • On/off control switch
  • Control and power fuses and breakers
  • SCR relays
  • Two limit controls, automatic and manual reset
  • Factory-installed relief valve
  • Drain valve
  • Low-water cutoff
04 · Documents

Manufacturer documents

05 · See also

Explore the range

Same category
Electric boilers
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Same brand
THERMO 2000
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06 · Questions

Frequently asked questions

Our mechanical room is small: will the boiler fit?

Thermo 2000 requires only 3 in on the sides and back, 24 in in front and 32 in above, with no clearance underneath. We measure the room and the access path during the free estimate, since the boiler weighs 550 lb (250 kg).

Can we keep our existing radiators?

The setpoint adjusts from 50 °F to 200 °F (10 °C to 93 °C), which allows it to supply radiators as well as a radiant floor. We check the condition of the loop and the emitters before confirming it in the quote.

How does it connect to the piping?

Through four 2 1/2 in male NPT side connections. The factory-installed relief valve and the drain valve are 3/4 in female NPT.

What maintenance does it need?

Thermo 2000 describes it as quiet, clean and low-maintenance; its Incoloy immersion elements are replaceable. The controller’s alarm codes help pinpoint a service call.

Is it available in 600 V?

Yes, the VoltMax SCR series comes in 600 V. This page covers the 480 V three-phase version, which draws 180.4 A.

AirGreen · Montréal, Laval, Longueuil, South Shore, North Shore

A 150 kW, 480 V VoltMax SCR, installed by AirGreen

Tell us about your project: we check the sizing, confirm availability and send you a quote. Or let our technicians install it for you.

RBQ 5645-9605-01Ventilation, refrigeration and electrical
Free estimateon site, for any installation
Quote in 24 hby phone or email
Bouchervilleshowroom

Specifications from the manufacturer’s documentation, checked on October 19, 2026.