5
3-90-233R24_11/13
1. Install 3/4” MPT boiler drain in the fitting as shown. Either
side can be utilized. Note: If using the supply and return
on each side, either one of the returns is going to need
the drain valve incorporated.
Note: Use Teflon pipe thread sealant or Teflon tape on
All threads before connections are made.
2. Install the 1/2” MPT temperature/pressure gauge in fitting
where shown.
3. Locate and install the outside air temperature sensor.
Location of this sensor should be on the North side of the
home or building and out of direct sunlight. Use a cat3
cable or 18-2 thermostat wire to attach the sensor to the
terminals located beside the control board. The wires can
be connected to the sensor with wire nuts or butt splice
connectors.
Installation
boiler kit materials: (refer to page 3)
List of items shipped with the unit.
1 - 3/4” Boiler Drain
1 - 3/4” Safety Relief Valve
1 - 1/2” Dual Temperature/Pressure Gauge
1 - Outdoor Air Sensor
2 - Piping Support Brackets
1 - Scraper Tool
4 - 1½” Levelling Feet. (page 7)
Preparation For Installation:
Attach Outside
Air Sensor Here
Bolt-Down Brackets:
Use the brackets from the
original packaging and at
least 4 bolts (not supplied)
to secure the unit in its
permanent location.
Recommended for all in-
stallations.
Note:
It is recommended that the
levelling feet be installed in
all installations. The air space
provided will help to prevent
condensation or trapped mois-
ture which may lead to rust on
the bottom of the unit.
The feet can be adjusted using
a 7/16” open end wrench.
