Filter
Top Products
SECTION 3: CRITICAL CONSIDERATIONS
3
SECTION 3: CRITICAL CONSIDERATIONS
3.1 Basic Information
UHA[S] heaters have automatic ignition burners for
ON/OFF operation only.
3.2 Location and Suspension
All models:
• Must be installed indoors.
• Must be installed in a level position with
horizontal discharge.
• May be mounted on a shelf of non-combustible
material.
• May be suspended from above (See Page 6,
Figure 2) or from wall brackets of sufficient
strength to support the heater as listed in the
Dimension Data Table on Page 38, Section 15.1.
Drop rods must be a minimum of 3/8" diameter
mild steel. Four suspension points (3/8" nuts)
are located on top of the heater.
• Must be installed in a manner which allows
access to all serviceable components.
See Page 4, Figure 1 for details.
3.3 Minimum Required Installation Clearances
Clearances around the heater and vent must be as
indicated on Page 4, Figure 1; Page 9, Figure 3
through Page 12, Figure 8 to ensure access for
servicing, and correct operation.
3.4 Clearances to Combustibles
Clearances must be as indicated on Page 4, Figure
1. If clearances to combustibles are not indicated,
then installation clearances apply.
3.5 Ventilation
It is important to ensure that there is adequate air
space around the heater to supply air for
combustion, ventilation and distribution in
accordance with local and national codes on Page 7,
Section 6.
3.6 Gas Supply
It is important that the gas supply pipe is sized
correctly to provide the inlet pressure as stated on
the heater data plate. The gas supply pipe and
electrical connections must not support any of the
heater's weight on Page 14, Section 8.
3.7 Electrical Supply
A permanent 120 V 60 Hz 1 Ø electrical supply is
required for the main electrical power. The heater
also requires suitable controls in accordance with
See Page 15, Section 9.
3.8 Vent
Choose heater orientation to allow for the proper
location of the vent. Each heater must be fitted with
a correctly sized sealed vent system.
If vented horizontally, no other appliance may be
connected to the vent. See Page 7, Section 6.
3.9 Separated Combustion Installation
For separated combustion installation, the vent and
air intake must be fitted with an individual and
correctly sized sealed system and the vent and air
intake must terminate at approved wall and roof
terminals.
Separated combustion units may not be common
vented. See Page 7, Section 6.