Brewery Glycol Chiller, Fermenter Cooling & Taproom Refrigeration Repair in Knoxville, TN
When a brewery glycol chiller trips out during active fermentation or crash cooling, batch temperatures spike and brite tanks warm up. JW HVACR LLC diagnoses and repairs packaged brewery glycol chillers, hydronic pump loops, brite tank walk-ins, and long-draw draft chillers within 60 miles of Knoxville—backed by our 90-Day Repair Warranty.
Based at 823 Reed Dr, Powell, TN 37849 • Office hours 8:00 AM–5:00 PM Mon–Fri • 24/7 emergency service available after hours
Brewery Glycol Chiller, Cellar & Taproom Systems We Service
We troubleshoot both the primary sealed refrigerant loop and the secondary food-grade propylene glycol circulation loop across craft breweries, cideries, distilleries, and taprooms.
Packaged Air-Cooled Brewery Glycol Chillers
- Single- and dual-circuit outdoor/rooftop packaged process chillers serving cellar fermenters and brite tanks
- Brazed-plate and immersed-coil evaporator heat exchangers, thermostatic expansion valves (TXVs), and hot-gas bypass valves
- 3-phase scroll and semi-hermetic compressors, head-pressure fan speed controls, and EPA Section 608 leak repair
Glycol Loop Hydronics, Pumps & Jacket Valves
- Insulated glycol reservoir tanks, centrifugal process circulation pumps, flow switches, and pressure bypass relief valves
- USP food-grade propylene glycol refractometer concentration testing (
30%–35%mix for28°F / -2°Cbath setpoints) - 24V and line-voltage motorized ball valves, diaphragm solenoid valves, and PID tank temperature controllers
Taproom Cold Rooms, Brite Tank Walk-Ins & Trunk Chillers
- Brite tank cellar walk-in coolers and taproom keg walk-in boxes maintained at a steady 36°F–38°F dispense temperature
- Dedicated long-draw glycol power packs and insulated trunk-line loops keeping remote draft towers cold without foaming
- High-humidity cellar evaporator defrost tuning, condensate drainage, and door envelope sealing
Technical Schematic: Primary Refrigerant & Secondary Glycol Loop
A brewery chiller transfers heat from fermenter dimple jackets into a food-grade propylene glycol loop (28°F), then rejects it across a brazed-plate evaporator into the primary refrigerant circuit.
Brewery Glycol Chiller Diagnostic Table: Symptom vs. Repair
Check these safe cellar and reservoir items first, and see how our technician diagnoses the primary refrigerant or secondary glycol fault:
| Symptom You Observe | Most Likely Root Cause | Safe 5-Minute Cellar Check | JW HVACR Diagnostic & Repair |
|---|---|---|---|
| Glycol bath temperature climbs above 32°F–40°F during active fermentation or crash cooling | Tripped high- or low-pressure safety switch, failed condenser fan motor, dirty outdoor coil, or low primary refrigerant charge | Check how many tanks are simultaneously crash-cooling (stagger crash-cooling if multiple tanks were dropped at once) and check the chiller disconnect/breaker | Measure primary suction/discharge pressures and superheat/subcooling, clean outdoor condenser coils, replace failed fan/contactor, and repair any refrigerant leak |
| Chiller locks out on low-pressure / freeze alarm with frost covering the brazed-plate heat exchanger | Diluted propylene glycol concentration (<25%), plugged Y-strainer reducing glycol flow, or failed flow switch / TXV |
Do not bypass the freeze stat; check the reservoir sight glass level and verify the glycol circulation pump is running | Test glycol freeze point with a calibrated refractometer (ASHRAE Refrigeration), flush Y-strainer, verify pump differential pressure, and adjust TXV/freeze protection |
| Glycol supply header has zero pressure or pump cavitates and screeches | Air-locked circulation pump, low reservoir bath level after adding a new fermenter, worn pump seal/impeller, or tripped motor starter | Inspect the glycol reservoir tank level and check the cellar floor or tank jackets for pink/clear propylene glycol drips | Bleed air from high-point vents, replenish USP food-grade propylene glycol (21 CFR § 184.1666) to 30%–35%, and repair/replace process pump or starter |
| One fermenter either over-chills into a slush ring or refuses to cool while other tanks hold temp | Stuck-open or stuck-closed tank jacket solenoid/motorized ball valve, clogged valve diaphragm, or drifted thermowell RTD/NTC sensor | Check whether the frosted supply/return jumper pipes on that specific tank match the controller's call light | Test 24V/120V coil and actuator operation, rebuild or replace the stuck jacket solenoid/ball valve, and calibrate the tank thermowell probe |
| Taproom draft beer pours pure foam even though the keg walk-in cooler reads 37°F | Failed long-draw trunk-line glycol chiller deck, dead agitator/recirculation pump, or warm tower return loop | Check the digital thermometer on the dedicated trunk-line glycol deck and verify the bath isn't frozen into a solid block | Service the trunk-line glycol power pack, replace failed recirculation pump or agitator motor, descale/clean condenser coil, and balance 38°F pour temperature |
Verifiable Technical & Regulatory Standards Cited on This Page
- U.S. Food and Drug Administration (FDA) — Food-Grade Propylene Glycol GRAS Standard (
21 CFR § 184.1666): Federal regulation governing USP food-grade propylene glycol used as a direct and secondary heat-transfer coolant in food and beverage processing equipment. Read 21 CFR § 184.1666 (eCFR) - Brewers Association — Draught Beer Quality Manual & Cellar Temperature Standards: Industry engineering guidelines specifying 38°F (3.3°C) keg storage and long-draw glycol trunk-line cooling performance to maintain carbonation equilibrium and prevent foaming. Read Brewers Association Draught Quality Resource
- ASHRAE Handbook — Refrigeration (Secondary Coolants & Beverage Process Cooling): Engineering reference governing propylene glycol aqueous solution freeze-point curves, viscosity/pump head calculations, and brazed-plate evaporator burst protection. Read ASHRAE Handbook Overview
- U.S. Environmental Protection Agency (EPA) — Clean Air Act Section 608 (
40 CFR § 82.161) & AIM Act Commercial Leak Repair Rule (40 CFR § 84.106): Mandatory technician certification and refrigerant leak-repair compliance for commercial process chillers and walk-in cold rooms. Read 40 CFR § 82.161 (eCFR) · Read 40 CFR § 84.106 (eCFR)
Trusted by Knoxville-Area Bars, Restaurants & Beverage Operators
Verified 5.0 ★ Google reviews from local commercial refrigeration customers in the Knoxville area.
“Fast response and excellent communication. Our walk-in cooler went down unexpectedly and they got us back up and running before we lost product.”
“Reliable service and great attention to detail. Clear diagnosis on our kitchen refrigeration equipment, backed by a warranty.”
Request Brewery Glycol Chiller or Taproom Refrigeration Service
Tell us what your glycol chiller, cellar walk-in, or draft trunk system is doing (or request a Custom Quarterly Brewery PM Proposal). Sends directly to info@jwhvacr.com—we respond during office hours (8:00 AM–5:00 PM Mon–Fri). For an urgent fermentation/chiller outage or 24/7 emergency service after hours, call (865) 214-7334.
Brewery Glycol Chiller or Keg Walk-In Down in East Tennessee?
Call JW HVACR LLC at (865) 214-7334. Every commercial repair is backed by our 90-Day Repair Warranty. Office hours 8:00 AM–5:00 PM Mon–Fri, with 24/7 emergency service available after hours within 60 miles of Knoxville.
📞 Call Now: (865) 214-7334