Carrier Aquazone™ 50WC Vertical Water Source Heat Pump – Supplied & Professionally Installed by 4Most Energy
The Aquazone™ 50WC Vertical is engineered equipment: AHRI certified to ISO 13256-1, ETL/Intertek listed, and built around Puron Advance™ (R-454B) refrigerant with a GWP of 465 — well under U.S. EPA and Canadian regulatory limits of 700. The unit's double-isolated rotary compressor (sizes 007–030) or scroll compressor (024–070) rides on a floating basepan with rubber grommet isolation, and a stainless steel drain pan with a factory-installed condensate overflow sensor protects against the corrosion and cracking that shortens the life of steel or plastic pans. Every vertical unit is internally trapped from the factory, and the swing-out control box and slide-out fan assembly are built for straightforward servicing in the tight equipment rooms and closets where these units are typically installed.
None of that performance is realized without correct installation. A 50WC Vertical replacement or new install requires water loop balancing to the unit's rated 1.5–4.0 GPM per ton, and ESA-compliant electrical work sized to the correct MCA/MOCP for the unit's voltage configuration — anything from 115V single-phase to 575V three-phase depending on size. Because vertical units are typically installed in confined equipment rooms or closets, Carrier's recommended service clearances (18–24 in. for blower access, 24–36 in. for compressor and electrical access) have to be accounted for at layout time, not discovered on service day. R-454B is a mildly flammable (A2L) refrigerant; installation and service must be performed by a licensed refrigeration mechanic under Ontario's refrigeration trade requirements, which 4Most Energy provides on every job.
4Most Energy is a certified installer for water source heat pump installation Toronto, water source heat pump replacement GTA, and Carrier Aquazone 50WC installation Ontario projects, and provides licensed gas technician near me and ENERGY STAR water source heat pump Toronto–calibre service across the region — so the unit's rated performance is what you actually get, not just what's on the spec sheet.
Carrier Water Source 50WC-3PD
Warranty
Carrier backs every Aquazone™ 50WC Vertical unit with a standard 12-month parts warranty from start-up (or 18 months from ship date, whichever occurs first), plus a compressor parts warranty of up to 5 years from shipping. Optional extended warranty coverage is available at the time of purchase. 4Most Energy handles warranty registration and the required Check, Test & Start documentation on your behalf.
- Puron Advance™ (R-454B) low-GWP refrigerant — GWP of 465, well under EPA/regulatory limits of 700.
- Double-isolated rotary (007–030) or scroll (024–070) compressor on a floating basepan with rubber grommet mounting for exceptionally quiet operation.
- Stainless steel drain pan with factory-installed condensate overflow sensor; vertical units are internally trapped from the factory.
- Swing-out control box and slide-out fan assembly for simplified maintenance without disconnecting ductwork.
- Three fan motor options — PSC (3-speed, standard), Constant Torque ECM, and Constant Airflow ECM (constant CFM delivery, sizes 015–070).
- Copper coaxial refrigerant-to-water heat exchanger, with cupronickel available for open tower, geothermal, or higher-corrosion water loops.
- Unit Protection Module (UPM) standard — high/low refrigerant pressure protection, air and water coil freeze protection, condensate overflow shutdown, and intelligent alarm reset.
- Optional single-stage electric heater (5, 7.5, or 10 kW) factory-installed on top-discharge vertical units with ECM motors.
- Optional hot gas reheat (HGRH), hot gas bypass (HGBP), and waterside economizer (WSE) for free cooling when loop water is between 40–65°F.
- Optional Carrier i-Vu® TruVu™ DDC controller with BACnet® IP connectivity for building automation integration.
- AHRI Certified (ISO 13256-1), ETL/Intertek Listed.
System Specifications & Operating Parameters
| Parameter | Value |
|---|---|
| Refrigerant | R-454B (Puron Advance™, A2L, GWP 465) |
| Heat exchanger | Copper coaxial standard; cupronickel optional |
| Fan motor | PSC standard; Constant Torque ECM or Constant Airflow ECM optional |
| Minimum operating water flow | 1.5 GPM/ton |
| Standard entering water temp range (water loop) | 50°F–80°F (rated); extended range 20°F–110°F |
| Ground loop / ground water entering temp | 32°F–77°F (ground loop); 50°F–59°F (ground water) |
| Maximum water working pressure | 400 psig standard; 300 psig with factory 2-way valve option |
| Controller | Unit Protection Module (UPM) standard; Carrier i-Vu® TruVu™ DDC optional (BACnet® IP) |
| Electrical protection | 5 kA SCCR standard; 65 kA SCCR optional |
| Filtration | 1" MERV 5 standard; optional 2" MERV 8, 2" MERV 13, or 4" MERV 13 |
| Cabinet finish | Heavy gauge galvanized steel |
| Certifications | AHRI Certified (ISO 13256-1), ETL/Intertek Listed, CSA C22.2 No. 60335-2-40 |
Full-load EER/COP and airflow-by-size performance data are extensive by fan motor type and voltage — request the Carrier 50WC Product Data (Form 50WC-4PD) or an eCAT selection report for exact tables by size and configuration.
50WC Vertical units are sized by nominal cooling capacity (sizes 007 through 070, corresponding to ½ through 6 tons — see the size table). Correct sizing depends on the served zone's square footage, glazing/exposure, occupancy, and the existing ductwork's airflow capacity — not simply matching the nameplate of the unit being removed. Because vertical units are installed in equipment rooms or closets, sizing also has to account for available floor space and Carrier's recommended service clearances (18–24 in. minimum for blower access, 24–36 in. for compressor and electrical access) so the unit stays serviceable long-term. If the space has a history of humidity complaints or the water loop can sustain 40–65°F temperatures, the hot gas reheat or waterside economizer options should be evaluated during sizing.
Model Sizes at a Glance — 50WC Vertical
| Size Code | Nominal Capacity | Compressor Type | Approx. Operating Weight | Approx. Shipping Weight |
|---|---|---|---|---|
| 007 | ½ ton (7,000 Btuh) | Rotary | 106 lb | 134 lb |
| 009 | ¾ ton (9,000 Btuh) | Rotary | 112 lb | 139 lb |
| 012 | 1 ton (12,000 Btuh) | Rotary | 117 lb | 144 lb |
| 015 | 1¼ ton (15,000 Btuh) | Rotary | 146 lb | 174 lb |
| 018 | 1½ ton (18,000 Btuh) | Rotary | 170 lb | 195 lb |
| 024 | 2 ton (24,000 Btuh) | Rotary or Scroll* | 191 lb | 218 lb |
| 030 | 2½ ton (30,000 Btuh) | Rotary or Scroll* | 191 lb | 218 lb |
| 036 | 3 ton (36,000 Btuh) | Scroll | 215 lb | 241 lb |
| 042 | 3½ ton (42,000 Btuh) | Scroll | 228 lb | 254 lb |
| 048 | 4 ton (48,000 Btuh) | Scroll | 228 lb | 253 lb |
| 060 | 5 ton (60,000 Btuh) | Scroll | 275 lb | 299 lb |
| 070 | 6 ton (70,000 Btuh) | Scroll | 338 lb | 362 lb |
*At 024 and 030, single-phase (208-230V/265V) units use a rotary compressor; three-phase (208-230V/460V) units use a scroll compressor. 4Most Energy confirms the exact compressor type for your specific voltage during the quote.
- Site assessment — existing unit inspection (brand, model, condition), water loop and electrical evaluation, mechanical room or closet clearance check.
- Load calculation and unit sizing — confirm correct 50WC Vertical size, compressor type, fan motor option, and return air side (left or right).
- Access and rigging setup — confirm floor space, doorway clearance, and Carrier's recommended service clearances before the unit arrives on site.
- Isolation and disconnection — lockout/tagout of electrical and water loop; safe removal of the old unit, with refrigerant recovery if applicable.
- Mounting — the unit is set on a high-density isolation pad extending at least 6 inches beyond the unit footprint in each direction to minimize vibration transmission.
- Water piping and ductwork connections — braided stainless supply/return hoses, isolation valves/strainer, the factory-internal condensate trap connected to the building drain, and supply duct connection with turning vanes to minimize turbulence.
- Electrical connection — ESA-compliant hookup to the building's dedicated circuit and disconnect, sized to the unit's rated MCA/MOCP.
- Commissioning — flow rate, temperature differential, refrigerant circuit verification, and (if equipped) TruVu™ DDC or option card configuration, with warranty registration filed.
- Final walkthrough — service clearances confirmed, controls demonstrated, and the space left clean before the crew leaves site.
Standard warranty: 12 months parts from start-up or 18 months from ship date, whichever occurs first, plus a 5-year compressor parts warranty. Optional extended warranty coverage is available at purchase — 4Most Energy will review the right level of coverage for your building's usage profile.
Ongoing maintenance is minimal: fan motors are permanently lubricated on most configurations and require no oiling. Filters should be checked every 60 days initially and adjusted to your building's actual lint/dust load thereafter; the stainless steel condensate drain pan and internal trap should be inspected annually. 4Most Energy offers scheduled maintenance plans that cover filter changes, condensate pan inspection, refrigerant circuit checks, and annual performance logging.
Service Area
Greater Toronto Area (GTA) and surrounding regions
Toronto, Markham, Richmond Hill, Vaughan, Aurora, Newmarket, Scarborough, Brampton, and Mississauga.
Extended Service Area: Stouffville, Oshawa, Barrie, Orangeville, Hamilton, St. Catharines, Guelph, Kitchener.
Frequently Asked Questions
How do I know if I even have this type of unit?
Look in your mechanical closet or equipment room for a floor-standing cabinet with ductwork running from the top and water piping at the base. If return air is drawn through a louvered grille in the closet door, that's this unit.
Is the Aquazone 50WC Vertical a direct replacement for my existing unit?
In most cases, yes — the vertical floor-standing footprint, duct connection, and water connections are compatible with standard retrofit practice, though 4Most Energy always verifies exact dimensions and return air side before ordering.
Do you need to do any demolition to install this unit?
Usually not — since the unit sits in an accessible mechanical closet or room rather than above a ceiling, most vertical replacements don't require the ceiling cutting and patching a horizontal replacement does. Ductwork and water piping reconnections are still required.
Is R-454B refrigerant safe in an occupied building?
Yes — R-454B is a mildly flammable (A2L) refrigerant with a GWP of 465, used safely worldwide in sealed HVAC systems. It must be installed and serviced by a licensed refrigeration mechanic, which 4Most Energy provides on every job.
Can this unit include electric heat?
Yes — an optional single-stage electric heater (5, 7.5, or 10 kW) is available factory-installed on top-discharge vertical units with ECM motors, useful for boilerless water loop applications or supplemental heat.
How long does a typical unit replacement take?
Most single-unit vertical water source heat pump replacements are completed in a single day, minimizing disruption to the tenant.
