MC COMBOMAX Electric boiler with integrated instantaneous water heater Models from 8 kW to 24 kW : 240 Volts ( single phase ) Use and Care Manual With installation instructions for the contractor ® Your COMBOMAX electric boiler has been carefully assembled and factory tested to provide years of trouble-free service.
Section 1 : Technical specifications Nominal load in amps Model Kw BTU/h Heating elements Including the circulator COMBOMAX XX-8 8 27 296 33.3 34.3 COMBOMAX XX-10 10 34 120 41.6 42.6 COMBOMAX XX-15 15 51 180 62.5 63.5 COMBOMAX XX-18 COMBOMAX XX-20 COMBOMAX XX-24 18 20 24 61 416 68 240 81 888 75.0 83.4 100.0 76.0 84.4 101.
THERMO 2000 inc. DESSIN D'ATELIER / GENERAL DIMENSIONS COMBOMAX XX-XX Legeng/Légende: Figure 2 1) Boiler Water Supply Connection / Alimentation du chauffage (1" npt F) 2) Boiler Water Return/ Retour du chauffage (1" npt F) 3) Domestic Water inlet / Entrée eau domestique (3/4" Sweat F) 4) Domestic Water outlet/ Sortie eau domestique (3/4" Sweat F) 5) Safety relief valve/ Soupape de sûreté (3/4" npt M.) 6) Temperature and pressure Gage/ Indicateur de Température et pression (1/2'' npt.
! General Safety Precautions 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 3.3 CLEARANCE 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. boiler or any part of the circuit. It is preferable to use a calibrated diaphragm expansion tank. 3.5.5 Makeup valve 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 nondraw periods. 3.5.
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. BWTD is the boiler water temperature drop through the heating circuit. For example, a 24 Kw COMBOMAXMC boiler has a rated output of 81,964 BTU/hour. The system is designed for a boiler water temperature drop (BWTD) of 20°F.
cold water supply line between the COMBOMAXMC 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. A check valve should always be installed in the recirculation line to prevent cold water from entering. 3.6.
3.11 BI-ENERGY SETUP To take advantage of a special domestic electric utility rate, your COMBOMAXMC 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. Please refer to figures 7 and 8 for the set-up required. The CBE-EM bi-energy switching control (available as an option) is especially designed to satisfy utility requirements.
Section 4 : Operation ! 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. Should you have any problems reading, following or difficulty in understanding the instructions in this manual, STOP, and get help from a qualified person.
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. Note: The maximum setting for the boiler outlet temperature is 190°F. 4.4 STARTUP PROCEDURE 1. Fill tank and coil as described in sections 4.1 and 4.2. 2.
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. Protect yourself against the possibility of scalding. Measure the hot water temperature and adjust it with the mixing valve, following the manufacturer’s instructions.
Section 5 : Maintenance Regular boiler maintenance will ensure troublefree 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. The owner should set up the following maintenance program. 5.1 BOILER WATER PIPING : Annual visual inspection.
! General Safety Precautions Be sure to read and understand the entire Use & Care Manual before attempting to install or operate this COMBOMAXMC unit. 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.
THERMO 2000 inc.
THERMO 2000 inc.
THERMO 2000 inc.
Diagramme électrique/ Wiri ng diagram COMBOMAX 240V Modèle/Model 6 - 10 KW L2 Figure 5 L1 G N F R5 Voir/see note 2 HL C1 EL1 TH1 R4 C1 C C1 EL2 TH2 C 120 V 24 V Légende/ Legend TH C HL Aquastat TH5 R Élément chauffant/ Heating element Lampe témoin Pilot light Contacteur de puissance Power relay Fusible Fuse Haute limite Hi-Limit Thermostat R1 Relais Relay R2 R3 R3 T Cablage en usine/ Factory wiring T R4 Chauffage/ Heating Brun/ Brown Cablage par l'installateur/ Wiring by o
Diagramme électrique/ Wiri ng diagram COMBOMAX 240V : modèle/ model 15 - 24 KW Figure 6 L1 G L2 N F R5 Voir/see note 2 HL C1 EL1 TH1 R4 C C1 C1 TH2 EL2 120 V TH3 EL3 24 V C1 C TH5 C1 R1 EL4 TH4 R2 R3 R3 T Légende/ Legend TH C HL Aquastat R Contacteur de puissance Power relay Fusible Fuse Page 19 Brun/ Brown Relais Relay Lampe témoin Pilot light Thermostat T R4 Chauffage/ Heating Élément chauffant/ Heating element Haute limite Hi-Limit R3 Voir/see note 2 R6 Bleu /
Figure 7 Diagramme électrique/ Wiri ng diagram Contrôle Bi-énergy/ Dual control ener gy CBE-EM L1 N 120 Vac Transfo 24 Vac Lumière haut tarif/ High tarif light H H V2 V3 Sonde extérieur/ Outdoor sensor E2 E2 Bi-energie/ Dual energy Relais/ Relay COMBOMAX V2 E1 Electrique/ Ele ctric SPDT Relais/ Relay Mazout/ Oil T2 T T1 T Relais chaudière mazout/ Oil boiler Relay Interrupteur DPDT Switch ON-OFF-ON Electrique/ Electric Noir/ Black V1 B Brun/ Brown AB Bleu/ Blue A Cablage en usine
Figure 8 THERMO 2000 inc.
Figure 9 Diagramme électrique/ Wiri ng diagram Raccordement de zone valves/ Wiring for zoned va lves system Thermostat Zone 1 Thermostat Zone 2 Thermostat Zone 3 Note 1 Block terminal thermostat /Thermostat terminal block sur panneau électrique COMBOMAX/ on COMBOMAX electric pannel 2 Zone valves 24 Vac 2 2 Zone valves 4 1 2 2 Zone valves 4 1 3 2 4 1 3 3 Transfo Note 1 T T 40Va Transfo (3 zones) 20Va Transfo (2 zones) Diagramme électrique/ Wiri ng diagram Raccordement de multiples circula
Aquastat Priorité DHW/ DHW priority (Sugg: 160F) Aquastat Élément no. 4/ Element no. 4 (Sugg: 165F) Aquastat Élément no. 3/ Element no. 3 (Sugg: 170F) Figure 10 Aquastat Élément no. 2/ Element no. 2 (Sugg: 175F) Aquastat Élément no. 1/ Element no. 1 (Sugg: 180F) Bornier valve 3 voies/ 3 way valve terminal block Bornier/ Terminal block C-C (Pompe/ Pump) Transformateur contrôle/ Transformer Control Fusible contrôle/ Control Fuse THERMO 2000 inc.
COMBOMAX TM LIMITED WARRANTY Warranty Coverage for Residential Installation. Thermo 2000 Inc.
