Freeze Protection Fluids; Heating Appliance Removal From A Common Vent System; Condensate Removal System - Baxi LUNA DUO-TEC 1.70 User Manual

FREEZE PROTECTION FLUIDS

CAUTION
Never use automotive or standard glycol antifreeze, or even ethylene glycol made for hydronic systems. Use only
inhibited propylene glycol solutions, which are specifically formulated for hydronic systems. Ethylene glycol is toxic
and can attack gaskets or seals used in hydronic systems. Ensure that the glycol used never exceeds 35% of the
systems volume as this may damage the systems components.
Consider piping and installation when determining a location for the boiler. Any claims for damage or shortage in a
shipment must be filed immediately against the transportation company by the consignee.

HEATING APPLIANCE REMOVAL FROM A COMMON VENT SYSTEM

When removing an existing heating appliance, the steps below shall be followed. During this procedure each appliance remaining
connected to the common vent system shall be placed in operation while the other appliances, remaining connected to the
common vent system, are in standby.
• Seal any unused openings in the common vent system.
• Visually inspect the venting system for proper size and horizontal pitch to determine if there is blockage, leakage, corrosion or
other deficiencies that could cause an unsafe condition.
• If possible, close all building doors, windows and doors between the space in which the appliance remains connected to
the common vent system and other spaces in the building. Turn on clothes dryers and any appliances not connected to the
common vent system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, at maximum speed. Do not
operate a summer exhaust fan. Close all fireplace dampers.
• Place in operation the appliance being inspected. Follow the lighting instructions. Adjust the thermostat so the appliance will
operate continuously.
• Test for spillage at the draft hood relief opening 5 minutes after main burner operation using a match or candle flame.
• After determining each appliance remaining connected to common venting system properly vents when tested as outlined,
return doors, windows, exhaust fans, fireplace dampers and any other gas burning appliance to their previous condition of use.
• Any improper operation of the common vent system must be corrected so the installation conforms to the National Fuel Gas
Code, ANSI Z223.1.
When resizing any portion of the common vent system, the common vent system must be resized to approach the minimum size
as determined using the appropriate tables in Appendix G in the National Fuel Gas Code, ANSI Z 223.1.
WARNING
Verify proper operation after servicing.

CONDENSATE REMOVAL SYSTEM

This vent is to be used on a efficiency condensing appliance; therefore this venting has a condensate removal system. Condensate
is nothing more than water vapor, derived from the combustion products. It is very important that the condensate line is sloped
away from the vent and down to a suitable inside drain. A condensate filter, if required by local authorities can be made up of lime
crystals; marble or phosphate chips that will neutralize the condensate. This can be done in the field by the installer. It is also very
important that the condensate line is not exposed to freezing temperatures, or any other type of blockage. Plastic tubing must be
the only material used for the condensate line. Steel, brass, copper or others will be subject to corrosion or deterioration. A second
vent may be necessary to prevent condensate line vacuum lock if a long horizontal run is used. Also, an increase in pipe size may
be necessary to drain properly. Support of the condensation line may be necessary to avoid blockage of the condensate flow.
CAUTION
The condensate line must remain unobstructed, allowing free flow of condensate. If condensate is allowed to freeze in
the line or if the line is obstructed in any other manner, condensate can exit from the boiler condensate trap, resulting
in potential water damage to property.
Note:
Use materials approved by the authority having jurisdiction. In the absence of an authority, PVC and CPVC pipe must comply with
ASTMD1785, F441 or D2665. Cement and primer must comply with ASTM D2564 or F493. For Canada, use CSA or ULC certified
PVC or CPVC pipe, fittings and cement. When installing a condensate pump, select one approved for use with condensing boilers
and furnaces. The pump should have an overflow switch to prevent property damage from condensate spillage. Condensate from
the boiler will be slightly acidic (typically with a pH from 3.0 to 4.0). Install a neutralizing filter if required by local codes.
5 7703477.01 (1-03/18)