Fig. 32 Aeration shutters
7.9. Operation checks
7.9.1. System pressure check
The appliance is pre-set to give the correct heat input with the gas for which it is
designed.
The burner manifold pressure is controlled by a built-in non-adjustable regulator.
The gas supply pressure to the appliance inlet and the manifold pressure must be
between the figures shown in section 3.2.
The manifold pressure should be checked at the pressure test point which is located
on a “T” piece between the control valve and the burner selector knob. The
pressure check should be made with both burners alight and the thermostat at its
highest setting.
7.9.2. Supply line pressure check
Fig. 33 Bottom Louver Attachment (Standard fascia)
The appliance and its individual shut-off valve must be disconnected from the
gas supply piping system during any pressure testing of that system at test
pressures in excess of 1/2 psig (3.5kPa). The appliance must be isolated from
the gas supply piping system by closing its individual manual shut off valve
during any pressure testing of the gas supply piping system at test pressures
equal to or less than 1/2 psig (3.5kPa).
7.9.3. Burner operation check
Check ignition, pilot stability, burner selection control, burner flames and the
full range of the thermostat using the rotary switch inside the appliance and
all other controls (appliance rocker switch, remote hand unit). See owner’s
lighting instructions further on in this manual for full details.
Fig. 34 Inner front unit attachment
(Standard fascia)
7.9.4. Aeration adjustment
On natural gas appliances (Model 737XN) both front and rear burners are equipped with
adjustable shutters to control primary aeration. The air holes are at the right side of the front and
rear burner rails - See fig 32. The shutters can slide to the right to reduce the air supply or to the
left to increase it.
The appliance is supplied with the shutters set to suit the vast majority of installations. No
adjustment should usually be necessary. However, in certain installations (e.g. Low Btu value gas,
high altitude) it may be necessary to adjust the shutter position of one or both of the burners to
obtain the optimal visual effect.
Aeration is not adjustable on Propane appliances (Model #737XP)
7.10. Fascia installation
7.10.1. Standard fascia
7.10.1.1 Hook the bottom louver unit on to the brackets near the bottom of the frame sides (see
fig. 33).
Take care not to trap any wires or thermostat parts between the frame and appliance case.
7.10.1.2 Locate the hooks on the inner front unit into the slots at each side of the fire box. Push the inner front fully downwards
(fig.
34).
7.10.2. Cast fascia
7.10.2.1 Attach the bottom front casting by hooking the two steel locators at back of the
casting over the brackets at the bottom of the front frame sides (see fig. 35). Check
that the swing door opens and shuts correctly.
Fig. 36
7.10.2.2 Rest the upper front casting on
the bottom casting. Then
slightly lift the upper casting
and attach it to the appliance
by hooking the two steel
locators at back of the casting
over the brackets inside the
top corners of the front frame
(see fig. 36).
Fig. 35
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