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COMBOMAX

MC

 Electric boiler Set-up, use and care guide 

(revised  Oct 2015)

,  Page 

4.

 

   

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 2 : Introduction 

 
 

 

The important safeguards and instructions 
appearing in this manual are not meant to 
cover all possible conditions and situations 
that may occur. It should be understood that 
common sense, caution and care are factors 
which cannot be built into every product. 
These factors must be supplied by the 
person(s) caring for and operating the unit. 

 
2.1 LOCAL INSTALLATION 
REGULATIONS 

This water heater must be installed in 
accordance with these instructions and must 
conform to local, or in the absence of local 
codes, with the current edition of the National 
Plumbing Code and the National Electric Code. 
In any case where instructions in this manual 
differ from local or national codes, the local or 
national codes take precedence. 
 

2.2 CORROSIVE ATMOSPHERE 

The heater should not be located near an air 
supply containing halogenated hydrocarbons or 
high humidity. The limited warranty is voided 
when failure of the water heater is due to a 
corrosive atmosphere.

 

 
2.3 SHIPMENT INSPECTION 

Inspect the water heater for possible shipping 
damage. The manufacturer’s responsibility 
ceases upon delivery of goods to the carrier in 
good condition. Consignee must file any claims 
for damage, shortage in shipments, or non-
delivery immediately against carrier. 
 
 
 
 
 

2.4 CHECKLIST 

Please check the technical information plate to 
ensure you have the right model. 
 

 

The following items are shipped with the 
unit : 

 

30 PSI pressure relief valve. 

 

Drain cock. 

 

Thermo manometer (heat and 
pressure indicator). 

 

Thermostatic mixing valve 

 

 
 
 
The boiler should not be located in an area 
where leakage from the tank or water 
connections will result in damage to the 
adjacent area or to lower floors of the 
structure. When such areas cannot be 
avoided, a suitable drain pan or non-
flammable catch pan, adequately drained, 
must be installed under the boiler. The pan 
must be connected to a drain. 
 
NOTE: Auxiliary catch pan MUST conform to 
local codes. 

 

WARNING 

  ! 

WARNING 

  ! 

Summary of Contents for COMBOMAX 23-10

Page 1: ...lation operation and maintenance of the boiler in order to ensure your full satisfaction It is imperative that all persons who are expected to install operate or adjust this boiler read the instructions carefully Any questions regarding the operation maintenance service or warranty of this water heater should be directed to the dealer or distributor you purchased it from When all installation step...

Page 2: ... 76 Gal US 3 4 Sweat F 1 NPT F 67 24 425 lbs Table 3 Domestic hot water production capacity in US gallons 1st hour Continuous Model 110F 140F 180F 110F 140F 180F COMBOMAX 23 8 75 44 28 47 33 24 COMBOMAX 23 10 87 52 33 59 41 29 COMBOMAX 23 15 116 73 48 88 62 44 COMBOMAX 23 18 134 85 57 106 74 53 COMBOMAX 23 20 145 93 63 117 82 59 COMBOMAX 23 24 169 110 75 141 99 71 1st hour Continuous Model 110F 14...

Page 3: ...COMBOMAXMC Electric boiler Set up use and care guide revised Oct 2015 Page 3 Figure 1 Component diagram ...

Page 4: ...ctric Code In any case where instructions in this manual differ from local or national codes the local or national codes take precedence 2 2 CORROSIVE ATMOSPHERE The heater should not be located near an air supply containing halogenated hydrocarbons or high humidity The limited warranty is voided when failure of the water heater is due to a corrosive atmosphere 2 3 SHIPMENT INSPECTION Inspect the ...

Page 5: ...physical damage for example by moving vehicles area flooding etc All models can be installed on combustible floors and in alcoves If the water heater is to be installed in a restaurant or other location where the floor is frequently cleaned it must be elevated to provide at least 6 inches of clearance from the floor to comply with NSF International recommendations The room temperature must not exc...

Page 6: ...heating system related to the variation of its water temperature during the heating season Consequently the selection of the appropriate expansion tank model must be made taking into account both the maximum operating temperature of the system and its water content Note that the water content of an heating system with cast iron radiators is a lot more than a system with hot water baseboard The imp...

Page 7: ... 8 4 6 3 4 COMBOMAX XX 24 24 16 4 8 2 5 5 4 1 3 5 9 2 Selecting a circulator Consult the manufacturer s operating characteristic curves to select the proper model These curves plot flow versus pressure together with other information such as efficiency and power Ask your pump dealer or HVAC wholesaler to recommend the circulator which best fits your needs 3 6 DOMESTIC HOT WATER CIRCUIT 3 6 1 Conne...

Page 8: ...arge at most 6 above the floor far from any live electrical parts The discharge line must pitch downward from the valve to allow complete draining and be no smaller than the outlet of the valve The end of the discharge line should not be threaded or concealed and should be protected from freezing No valve of any type restriction or reducer coupling should be installed in the discharge line Local c...

Page 9: ... COMBOMAX MC 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 The CBE EM control selects the ...

Page 10: ...tap as soon as water flows out of it Fix any leaks Open all other hot water taps fed by this heating coil to bleed the air trapped behind them 4 3 ADJUSTING THE AQUASTATS Once all air has been bled from the system and all components valves bleeders controls have been properly adjusted the boiler can be put into operation Never operate the boiler before these adjustments are complete Bear in mind s...

Page 11: ...ximum boiler water temperature is 190 F This should be 20 F to 40 F above the desired temperature for domestic hot water In practice the boiler water temperature should be between 160 F and 180 F An excessively high setting can cause scalding Use the thermostatically controlled mixing valve included with the unit to lower the domestic hot water temperature and thus the risk of injury When there is...

Page 12: ... inspection To be checked manually to ensure safety and proper operation Air trapped in the boiler is bled Make sure the water is discharged to a floor drain and that no bystander is splashed Use the lever to open the safety valve Hot water should come flowing out Upon releasing the lever the safety valve should shut tight If it does not it must be replaced by an identical or equivalent model Neve...

Page 13: ...he energy source has shut off To find hot water temperature being delivered turn on a hot water faucet and place a thermometer in the hot water stream The following chart details the relationship of water temperature and time with regard to scald injury and may be used as a guide in determining the safest water temperature for your applications TIME TO SCALDING VS TEMPERATURE RELATIONSHIP Temperat...

Page 14: ...COMBOMAXMC Electric boiler Set up use and care guide revised Oct 2015 Page 14 Figure 2 General diagram single zone ...

Page 15: ...COMBOMAXMC Electric boiler Set up use and care guide revised Oct 2015 Page 15 Figure 3 General diagram radiant floor application ...

Page 16: ...COMBOMAXMC Electric boiler Set up use and care guide revised Oct 2015 Page 16 Fig 4 General diagram used on large heating water systems ...

Page 17: ...COMBOMAXMC Electric boiler Set up use and care guide revised Oct 2015 Page 17 Figure 5 General diagram used on multi zones systems ...

Page 18: ...COMBOMAXMC Electric boiler Set up use and care guide revised Oct 2015 Page 18 Figure 6 General diagram Dual Energy system without trhee way valve ...

Page 19: ...COMBOMAXMC Electric boiler Set up use and care guide revised Oct 2015 Page 19 Figure 7 General diagram Dual Energy with three way valve ...

Page 20: ...COMBOMAXMC Electric boiler Set up use and care guide revised Oct 2015 Page 20 ...

Page 21: ...COMBOMAXMC Electric boiler Set up use and care guide revised Oct 2015 Page 21 ...

Page 22: ...ar l installateur Wiring by others H H V1 V2 V3 E1 E2 Valve 3 voies optionnelle Optional 3 way valve Sonde extérieure Outdoor sensor Lumière haut tarif High tarif light Transfo 120 Vac 24 Vac Interrupteur DPDT Switch ON OFF ON Bi energie Dual energy Electrique Electric Mazout Oil DPST Relais Relay Chaudière mazout Oil boiler T T relais de combustion oil boiler burner DPST Relais Relay T6 T5 Relais...

Page 23: ...COMBOMAXMC Electric boiler Set up use and care guide revised Oct 2015 Page 23 Figure 8 Wiring diagram single and multiple zones ...

Page 24: ...COMBOMAXMC Electric boiler Set up use and care guide revised Oct 2015 Page 24 Figure 10 Parts list 240V models ...

Page 25: ...the unit Exclusions This warranty is void and shall not apply if A Defects or malfunctions resulting from installation repair maintenance and or usage that are not done in conformity with the manufacturer s installation manual or B Defects or malfunctions resulting from installation maintenance or repair that are not done in accordance with regulations in force or C Defects or malfunctions resulti...

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