24
P40-R I&O Manual
IM120801
RD: AUG 2013
RL: 1D
12 COMBUSTION AIR REQUIREMENTS
Outside combustion air must not be ducted directly to this appliance.
Do not install a filter at the combustion air inlet.
Make provision to ensure adequate combustion and ventilation air in the space:
USA:
In accordance with Section 9.3 ANSI Z223.1 / NFPA-54 for a fan-assisted appliance.
Canada:
In accordance with CSA B149.1: 4 in
2
(2,600 mm
2
) required free area of air-supply
opening [acceptable round opening of approximate 2.25 in (57 mm) diameter].
Ensure adequate clearance around the air intake (at top of burner cabinet) to allow sufficient
combustion air supply to the heater. Keep the area around the air intake free and clear of de-
bris or other material.
Regularly check that the bird-screened air inlet on top of blower is not clogged with dust or fi-
brous material. Clean away any foreign matter build-up regularly.
13.
GAS SUPPLY - GAS CONNECTION
CAUTION:
All gas supply piping and appliance connection must be in accordance with local
and national codes,
ANSI Z223.1 (NFPA 54)
in the USA, and the
CSA B149.1
Natural Gas and Propane Installation Code
in Canada. Model P40-R is an appli-
ance approved as a Vented Overhead Heater under ANSI Z21.86 / CSA 2.32
Vented Gas-Fired Space Heating Appliances.
TEST FOR LEAKS: All gas piping and connections must be tested for leaks after
the installation is completed.
Apply soap suds solution to all connections and joints and if bubbles appear,
leaks have been detected and must be corrected.
DO NOT USE A MATCH OR OPEN FLAME OF ANY KIND TO TEST FOR
LEAKS. NEVER OPERATE THE HEATER WITH LEAKING CONNECTIONS.
Provide a 1/8 in (3.2 mm) NPT plugged tapping, accessible for test gauge con-
nection, immediately upstream of the gas supply connection to the heater.
The gas supply should be checked first with heater turned “OFF” followed by an-
other check with heater turned “ON”.
This appliance and its main gas valve must be disconnected from the gas supply
piping system during any pressure testing of the gas supply piping system at test
pressure in excess of 1/2 psi (3.5 kPa).
This appliance must be isolated from the piping system by closing the equipment
shut off valve (field supplied) during any pressure testing of the gas piping sys-
tem at test pressure equal to or less than 1/2 psi (3.5 kPa).
