Roberts Gorden 150 Manual Do Utilizador

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UHA[X][S] heaters have automatic ignition burners 
for ON/OFF operation only. 

Gas-fired, power-vented unit heater with tubular heat 
exchanger. Units shall have a minimum of 82% 
thermal efficiency. The standard unit shall consist of 
a non-separated combustion design with an 
aluminized heat exchanger. Design and heat 
exchanger alternatives shall be offered as follows:

• Separated Combustion: A separated combustion 

unit shall feature an enclosed, sealed burner 
box. A piece of flexible air duct connects this 
burner box to a flange on the cabinet. 
Combustion air should be ducted from outside 
the heated space, with the ductwork connecting 
to the unit with the use of the flange.

• Stainless Steel Heat Exchanger: A stainless 

steel heat exchanger unit shall consist of heat 
exchanger tubes, heat exchanger tube supports, 
heat exchanger tube plates and vent box 
produced of 409 stainless steel.                       
The use of stainless steel heat exchanger unit is 
recommended when air inlet temperatures are 
below 40° F (4.4°C) or temperature rise is less 
than 40° F (22.2° C) as condensation may form 
on the heat exchanger resulting in corriosion that 
may shorten its life.

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 (

Figure 5) or from wall brackets of sufficient 
strength to support the heater as listed in the 
Technical Data Table 

on Page 49, Section 16.2. 

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 7, Figure 4 for details.

Clearances around the heater and vent must be as 
indicated 

on Page 7, Figure 4 and Page 13, Figure 6  

to ensure access for servicing and correct operation.

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 

11, Section 7. 

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 19, Section 9. 

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 21, Section 10.

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 11, Section 7.