Operating instructions

1104UESAGBEN, page 9/31
Minimum inlet pressure natural gas : 17.0mbar
Minimum inlet pressure propane : 35.0 mbar
Table 4
Burner jets and
pressures
Figure 4
Honeywell gas
valve
1) Gas inlet
2) Gas outlet
3) Inlet pressure tap
4) Outlet pressure tap
5) 6.3mm AMP terminals and screws for wiring
6) 6.3mm AMP terminals
7) Earth terminal/screw (line voltage models only)
8) Pressure regulator adjustment screw
68 7
5
1
3
4
2
035 055 083 102
Nat. Gas
(G20)
Burner jet
mm 5,30 6,80 7,60 8,90
Burner
pressure
mbar 8,80 8,10 11,20 8,90
inlet pressure
20mbar
Prop. (G31)
Burner jet
mm 2,90 3,65 4,50 5,00
Burner
pressure
mbar 36,20 35,80 35,40 34,70
inlet pressure
37mbar
6.1.4 Gas conversion
Reznor UESA air heaters are designed to operate on natural, propane or butane gas
and will be supplied fi tted for the gas type ordered. In the event a site conversion is
required it is necessary to change the burner jet and gas valve.
Affi x new data plate and gas type label.
Upon completition of conversion re-commission the air heater in accordance with sec-
tion 9 of this document.
Changes to carry out :
Natural gas : set pressure regulator as per table in section 6.1.3
Propane/butane : set pressure regulator on maximum pressure and seal regulation
screw.
Additional information is supplied with the conversion kit.
6.2.1 Flue requirements
Model UESA heaters may be installed as Type-B or Type-C installations.
Flue must be in accordance with BS6230 or BS5440. Local requirements may apply in
addition to national requirements. The heaters are designed to operate safely and effi -
ciently with either a horizontal or vertical fl ue system when installed in accordance with
the manufactuerers instructions. If this heater is replacing an existing unit, ensure that
the fl ue is of the correct size and if suitable to use the existing fl ue is in good condition.
A correctly sized fl ue system is required for safe operation of the heater. An uncorrectly
sized fl ue system can cause unsafe conditions.
6.2 Flueing and
combustion air