ECR Dunkirk Q95M-200, Installation, Operation & Maintenance Manual

6.2 Combustion Air and Vent Pipe Requirements

• This boiler requires dedicated direct vent system. 
• In direct vent system all air for combustion is taken 

directly from outside atmosphere, and all flue products 

are discharged to outside atmosphere.

• Combustion air and vent pipe connections must 

terminate together in same atmospheric pressure 

zone, either through roof or sidewall (roof termination 

preferred). See Figures 5 and 6

for required clearances. 

For proper set up of concentric vent termination see 

Figure 7 and Figure 8.

 WARNING

Solvent cements are combustible. Keep away from 

heat, sparks, and open flame. Use only in well 

ventilated areas. Avoid breathing in vapor or allowing 

contact with skin or eyes. Failure these instructions 

could result in fire, personal injury, or death.

!

• Locate combustion air inlet as far away as possible 

from swimming pool and swimming pool pump house. 

• All combustion air and vent pipes must be airtight and 

watertight. Combustion air and vent piping must also 

terminate as shown in “Combustion Air and Vent Pipe” 

section.

• Vent connections serving appliances vented by 

natural draft shall not be connected into any portion 

of mechanical draft systems operating under positive 

pressure.

• Covering non-metallic vent pipe and fittings with 

thermal insulation shall be prohibited.

6 - LOCATING THE BOILER

6.3 Condensate Drain Requirements

• Condensate trap provided with boiler, an additional 

trap is not required and should not be used.

• Pitch condensate drain line down to floor drain at 

minimum of ¼” per foot. External condensate pump 

(not furnished) may be used if floor drain is not 

available. 

• Condensate pump must be designed for flue gas 

condensate application.

• Wood frame or blocks may be used to raise boiler 

to maintain drain pitch or to be above external 

condensate pump reservoir.

• If boiler is not level, condensate drain lines will not 

function properly.  Adjustable feet are located on boiler 

to make up for minor surface irregularities or tilt.

• 115 volt AC receptacle provided on control panel to 

provide power for external condensate pump if used.

6.4  Removal of Existing Boiler From Common 

Vent System

When an existing boiler is removed from a common 

venting system, the common venting system is likely to be 

too large for proper venting of the appliances remaining 

connected to it. At the time of removal of an existing boiler, 

the following steps shall be followed with each appliance 

remaining connected to the common venting system 

placed in operation, while the other appliances remaining 

connected to the common venting system are not in 

operation.

1. 

Seal any unused openings in the common venting 

system.

2. 

Visually inspect the venting system for proper size and 

horizontal pitch and determine there is no blockage, or 

restrictions, leakage, corrosion and other deficiencies 

which could cause an unsafe condition.

3. 

In-so-far as is practical, close all building doors and 

windows and all doors between the space in which the 

appliances remaining connected to the common venting 

system are located and other spaces of the building. 

Turn on clothes dryer and any appliance not connected 

to the common venting system. Turn on any exhaust 

fans, such as range hoods and bathroom exhaust, so 

they will operate at maximum speed. Do not operate a 

summer exhaust fan. Close fire dampers. 

4. 

Place in operation the appliance being inspected. 

Follow the lighting instructions. Adjust thermostat so 

appliances will operate continuously.

5. 

Test for spillage at the draft hood relief opening after 5 

minutes of main burner operation. Use the flame of a 

match or candle, or the smoke from a cigarette, cigar 

or pipe.

6. 

After it has been determined that each appliance 

remaining connected to the common venting system 

properly vents when tested as outlined above, return 

doors, windows, exhaust fans, fire place dampers, 

and any other gas-burning appliance to their previous 

condition of use.

7. 

Any improper operation of the common venting system 

should be corrected so the installation conforms with 

the National Fuel Code, NFPA-54/ANSI -Z223.1 and/or 

the Natural Gas and Propane Installation Code, CAN/

CSA B149.1. When re-sizing any portion of common 

venting system, common venting system should be re-

sized to approach minimum size as determined using 

appropriate tables in Chapter 13 of the National Fuel 

Gas Code, NFPA-54/ANSI- Z223.1 and/or the Natural 

Gas and Propane Installation Code, CAN/CSA B149.1.

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