COMBOMAX Electric boiler with integrated instantaneous water heater Models from 8 kW to 24 kW : 2 4 0 V o l t s ( s i n g l e p h a s e ) Use and Care Manual With installation instructions for the contractor ®...
Be sure to read and understand the entire Use & Care Manual before attempting to install or operate this water heater. Pay particular attention to the following General Safety Precautions. Failure to follow these warnings could cause property damage, bodily injury or death. Should you have any problems understanding the instructions in this manual, STOP, and get help from a qualified installer or technician.
Section 3 : INSTALLATION WARNING The manufacturer’s warranty does not cover any damage or defect caused by installation or attachment or use of any special attachment other than those authorized by the manufacturer into, onto, or in conjunction with the water heater. The use of such unauthorized devices may shorten the life of the water heater and may endanger life and property.
Install shutoff (ball) valves for servicing convenience. Install thermometers on the inlet and outlet lines. Never plug the pressure relief valve to avoid creating a hazardous situation. 3.5.2 Flow-check valve If the heating system uses a single circulator, a flow-check valve must be installed to minimize gravity flow and heat loss during non- draw periods.
Pump flow rate = Boiler output ÷ BWTD ÷ 500 • Pump flow rate is expressed in U.S. gallons per minute or GPM. • The Boiler output ( in net BTU per hour) is the maximum amount of heat to be transferred through the heating circuit to meet the hot water demand.
cold water supply line between the COMBOMAX unit and flow check valve. Contact your installing contractor, water supplier, local plumbing inspector or plumbing supply house for assistance. 3.6.3 Recirculation line (if applicable) If a recirculation line is installed, the return connection should be made to a tee close to the inlet connection on the water heater.
3.11 BI-ENERGY SETUP To take advantage of a special domestic electric utility rate, your COMBOMAX boiler can be combined with an existing oil or gas-fired furnace. Please contact your utility to make sure your building is eligible and to find out about the new wiring configuration.
SAFETY PRECAUTIONS Before operating this water heater, be sure to read and follow these instructions, as well as the warnings printed in this manual. Failure to do so can result in unsafe operation of the water heater resulting in property damage, bodily injury, or death.
Adjust the boiler aquastats as required. Please note that lowering the setting will not have an immediate effect as the heat stored in the boiler water must first be consumed. Check the boiler water temperature periodically. Further adjustments may be required as the system goes through several space and water heating cycles.
4.6 ADJUSTING THE MIXING VALVE A thermostatically controlled mixing valve works automatically thanks to the thermostatic element controlling the mix of very hot and cold water as required to provide safe domestic hot water under variable conditions. To adjust the mixing valve setting, carefully open a hot water tap.
Regular boiler maintenance will ensure trouble- free service for many years. It is recommended that you set up and follow a maintenance program. All components fail eventually. The use of incorrect replacement parts or disregarding safety procedures and warnings during repairs may reduce the boiler safety level and shorten its useful life.
Be sure to read and understand the entire Use & Care Manual before attempting to install or operate this COMBOMAX Precautions. Failure to follow these warnings could cause property damage, bodily injury or death. Should you have any problems understanding the instructions in this manual, STOP, and get help from a qualified installer or technician.
Diagramme électrique/ Wiri ng diagram Raccordement de zone valves/ Wiring for zoned va lves system Thermostat Zone 1 Zone valves 24 Vac Transfo 40Va Transfo (3 zones) 20Va Transfo (2 zones) 120 Vac Raccordement de multiples circulateurs/ Wiring for m ultiple circulators Electrical service Thermostat Zone 1...
COMBOMAX LIMITED WARRANTY Warranty Coverage for Residential Installation. Thermo 2000 Inc. hereby warrants to the original residential purchaser that the COMBOMAX tank and exchanger (coil assembly) installed in a residential setting shall be free of leaks during normal use and service for a period of fifteen (15) years from the date of purchase as long as the original residential purchaser owns the home in which the unit was originally installed, the ten (10) years in full and years eleven (11) through fifteen (15) prorated 20% each year at suggested retail price.