PrecisionTemp TwinTemp Junior Installation Manual

Please read these instructions thoroughly before starting your installation
Note: These instructions apply to both models. The TwinTemp-2 is a dual zone heating unit whereas the Junior is a
single zone. Both also provide continuous hot water. Installation is identical except for the additional zone.
The TwinTemp is designed to be installed in a ventilated compartment of the vehicle such as a lower luggage
compartment
or "basement" and vented through the bottom of that compartment to the outside. The heater must not be mounted
in the living area of the vehicle or in a way that receives its combustion air from the living area or flues into the
living area of the vehicle. Doing so will void the warranty and cause the heater to malfunction and could cause
damage, injury or death.
Please read these instructions before making any modification to the construction of your RV.
Installation Overview
The installation of the TwinTemp is done in three steps:
Installation of main heating unit and exhaust system
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Installation of blower heating units and thermostats
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Routing wiring and high temperature tubing from main heating unit to blowers
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Installation of main heating unit and expansion tank
When selecting an installation location, please note the following installation requirements:
Surface should be able to support at least 100 pounds
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The front panel of the heater should be accessible for inspections or servicing
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The vent must be able to be installed through the floor without interference with frame members or
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other equipment.
The compartment where the heater is installed must not be air tight from the outside. There should
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be at least 12 square inches of fresh air available from the outside, NOT FROM THE LIVING
AREA OF THE VEHICLE OR TINY HOUSE.
Caution: the combustion air cannot be supplied from any compartment which may contain
combustible gases (i.e. battery gases, gasoline fumes, propane fumes, etc.)
Water, gas and electric line should be able to run to the installation.
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Installation must be done to allow at least 10" access to the front and at least 8" access above the
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unit. There must be access to all plumbing connections on the right side of the heater if they are not
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made prior to securing the installation into place.
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There should be at least 1" clearance in the back and at least 8" of top clearance is recommended to
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facilitate startup.
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It is recommended to install the heater as close to the gas supply as practical to minimize the length
of the gas line.
TwinTemp Installation Manual