Benjamin Heating products WK400, Owner'S Manual

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INSTALLATION INSTRUCTIONS FOR THE WK4OOA
The BENJAMIN WK400A wood furnace is certified by the Canadian Standards Association for series
connection to the outlet only of an existing electric, gas or oil fired furnace. The instructions for the care
and operation of the WK400 forced air furnace which appear elsewhere in this manual, also apply when
used as an add-on. In addition, the following instructions must be observed to ensure your safety and
comfort. Ensure that there is a minimum of 200 sq. inches of return air back to the furnace.
1. The WK400A may be connected to warm air furnaces with an air volume of 1100 to 1300 CFM, a
warm air furnace having an oil input as shown on the original name plate between
.85 GPH (US)
minimum and 1.10 GPH (US) Maximum or an existing warm air furnace having an output of 100,000
to 130,000 BTU’s per hour. Units outside of these ratings are not suitable for connection to the
WK400A.
2. The interconnecting duct shall have a crossed sectional area of not less than 240 sq. in., and the duct
elbows shall have a minimum inside radius of six inches.
3. The installer will find it necessary to cut the proper size holes in the appropriate side panel of the
furnace (See Diagram on page 8).
4. A typical add-on installation is shown on page 8. This configuration must be followed.
5. The wiring must be installed by a qualified licensed electrician. Wire the add-on wood furnace in
accordance with page 9, using the controls provided. The proper positioning of the controls on the
wood unit is shown on page 8. The interconnecting wiring from the primary furnace to the wood
furnace shall conform to all local codes and regulations. It is recommended that an approved metal
conduit be used for this purpose.
CAUTION:
DO NOT connect the duct work in such a manner that reverse air flow is possible.
DO Operate the primary furnace periodically to ensure that it will operate satisfactorily when needed.
DO NOT relocate any of the safety controls in the original installation.
DO Be sure that the duct system is in good condition and that the chimney is suitable for connection
to a wood burning appliance.
DO NOT change the primary furnace blower. (Pulleys and motor may be changed.)
A central location is most desirable for a hot air furnace. A short distance from the chimney with
large ducts will give best results.
DO NOT connect this unit to an automatic stoker.
INSTALLATION
Electric and mechanical installation must conform to all local and national codes and standards as their
jurisdiction may apply. It is imperative that a qualified installer be engaged who is familiar with local
codes and standard requirements. Select a standard position for your furnace, close to the chimney using
large ducts. Connect only to a flue approved for solid fuels. Install the thermostat in a location free from
drafts. Place the furnace on a non-combustible floor. The blower compartment may be placed on either the
right or left side. (Blower compartment instructions are included.)
ELECTRICAL
See Page 9 & 11