Premier VS Infrared Heating System
Page 50
June 04, 2014
INSTALLATION - Part 3
Part 3
- Optional Combustion Air Supply
An air supply at atmospheric pressure of 40 CFM per 100,000 BTU/hr to each Burner and the end of each
Radiant Branch (at the End Vent Cap) is usually sufficient.
Under certain circumstances of very dirty or wet environments, or extremely negative building pressure, a
Combustion Air Supply System that is connected to the fresh air outside the building may be recommended.
The Combustion Air Supply System must be designed with accepted HVAC design methods to ensure adequate
supply of air to each Burner and Radiant Branch. This Combustion Air can be supplied using a Blower. Supply
at the Burner must be at atmospheric pressure therefore it may be necessary for the
Installer
to insert Damper
Couplings to allow adjustment of pressure just before the connection to each Burner and at the end of each
Branch.
The Blower must be electrically interlocked with the Vacuum Pump, details can be found in
“Electrical Connections”.
A
- Combustion Air Supply Duct Connections
1.
Install Blower if required.
2.
Install Combustion Air Supply ductwork and Damper Couplings as required.
3.
Each Burner can be fitted with a 4” dia. fitting to accept 4” dia. Type C-Duct or 4” PVC pipe. Provision for
thermal expansion of the System must be made when considering Combustion Air Supply Ducting. Ensure
that the System movement / expansion does not restrict the supply of fresh air to the Burners or the Radiant
Branches. (Refer to Figure 37 for clearance requirements)
As required, connect the Supply Ductwork in the same manner as for the Burner. (Refer to Figure 37 for
details),
DO NOT
remove the End Vent Cap from the Radiant Branch to make this connection.
Figure 37: Outside Combustion Air Detail
Air
Flo
w
Dire
ctio
n
12" Min.
Flex Duct
To Outside Air:
Directly to Outside
or to Common
Ductwork
from Blower
Outside Air Dampers*
* Dampers are to be provided by Installer,
as necessary, to obtain atmospheric
pressure at the Burner(s)
for all Flex Ducts
To Outside Air:
Directly to Outside
or to Common
Ductwork
from Blower
Note:
DO NOT Remove
End Vent Cap
