Bell & Gossett 138809 GMU60 Glycol Make-Up Unit

Description

Large district-heating and process chilled-water systems can consider the Bell & Gossett 138809 GMU60 with 60-gallon storage, 115 V single-phase power, pressure-switch control, high-density polyethylene tank construction, and a 1/2-inch NPT discharge connection.

The GMU60 automatically draws water or water-glycol mixture from its tank for closed-loop make-up service, with documentation identifying operation up to 60 psi and approximately 5 GPM. Factory pressure-switch settings are listed at 30 psi cut-in and 50 psi cut-out.

System Components

• Sixty-gallon storage capacity establishes the reservoir volume for make-up planning.
• 115 V single-phase power supports electrical connection and control-panel planning.
• High-density polyethylene construction identifies the tank material for fluid-storage review.
• Pressure-switch control provides automatic start and stop based on system pressure.
• A 1/2-inch NPT discharge connection requires compatible make-up piping and fittings.
• The 60 psi system limit establishes a documented pressure boundary for application review.
• District heating and process chilled-water service define the listed application context.

Performance and Application

The GMU60 is listed for closed-loop heating, chilled water, process systems, snowmelt, radiant heat, and potable-water break-tank service. Documentation identifies operation up to 60 psi and approximately 5 GPM, while these values describe make-up capability rather than guaranteed system pressure control.

Installation Requirements

Install the unit on a level, secured base with accessible inspection space, provide secondary containment for glycol service, support the discharge line independently, and inspect fittings for leaks. Correctly sized relief, expansion, pressure, temperature, and flow-control devices remain necessary for closed-loop operation.

Warranty and Maintenance

Bell & Gossett provides an 18-Month Limited Warranty from shipment or a 1-Year Limited Warranty from installation, whichever occurs first, covering material and workmanship defects. Proper installation and intended use are required, while misuse, alteration, negligence, and contrary operation are excluded. Mulmotor provides pre-purchase product guidance and order-related customer support.