Tjernlund HS3,4,5 Series with UC1 Universal Control (Version X.02) 8504111 Rev 09/02 - Manual (Page 8)

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VENT PIPE INSTALLATION
If Installing the Power Venter on an appliance not equipped with a draft hood or draft diverter (e.g. Power Burners, Induced Draft), a
barometric draft control must be added. The barometric draft control must be the same size as the flue outlet and installed as close
as possible to the appliance. After the draft hood, draft diverter or barometric draft control, a tapered reducer should be installed to
reduce the flue to the size shown in the selection table on page 2 of these instructions. After the tapered reducer, install the appropri-
ate type of vent pipe to the inlet of the Power Venter. The vent pipe chosen must be in compliance with local codes. The Power
Venter inlet and outlet are designed to accept single wall vent pipe. If using vent pipe other than single wall, the installer must supply
adapters to connect to the Power Venter. While it is recommended that the Power Venter be mounted at the point of termination, it is
acceptable to install vent pipe between the outlet of the Power Venter and the point of termination. The Installer must seal all vent
pipe connections after the Power Venter with high-temperature caulk or aluminum vent pipe tape to prevent flue gas leakage during
operation. The size of the vent pipe between the Power Venter and point of termination should be the same size shown on the selec-
tion table. Support the vent pipe as recommended by it’s manufacturer. Examples of proper vent pipe installation are shown below.
IMPORTANT: Elbows placed directly after discharge on Power Venter may cause erratic operation of Fan Prover. If elbows are
necessary on discharge, allow for a straight section of pipe 3 times the vent diameter being used before installing an elbow.
UC1 AND FAN PROVER SWITCH INSTALLATION
Do not mount the UC1 junction box on a heat source that exceeds 140oF. Examples of improper mounting surfaces include vent
pipe, top of heater casing or any place where radiant or convective heat would cause the junction box temperature to exceed 140oF.
The UC1 is intended for indoor installation only.
Using the key hole slots on the back of the UC1 junction box as a template, mark 4 holes on the mounting surface, drill pilot holes if
necessary, and secure junction box using provided screws.
The UC1 has a 2 foot whip that contains a ground lead and the leads to power the Venter motor and connect to the Fan Prover. If it
is desirable to mount the UC1 more than 2 feet from the Fan Proving Switch an additional electrical junction box and appropriate
length of conduit will be necessary. Any added wire should be 14 gage and a pig tail should be added to each ground wire connec-
tion so that each electrical junction box is grounded. See diagram on page 8 for a typical UC1, Fan Prover and Venter installation.