Nortek Reznor VRA-4E Series, Установка, пусконаладка, обслуживание

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1712VRA ‐ 4EGBEN, pag.. 12/25
6.4.2 To turn the air heater "OFF" for short periods
Adjust the room thermostat to its lowest setting or
'OFF'. The fan will continue to run to cool the
heater and then switch OFF automatically.
6.4.3 To turn the air heater "OFF" for long periods
Adjust the room thermostat to OFF or its lowest
setting. When the fan has stopped, turn OFF the
gas supply and then switch OFF the electricity
supply to the air heater.
6.5 Air heater gas pipe work
The soundness of the air heater pipe work has
been checked prior to leaving the factory.
However during installation, connections may
have been loosened. Check the soundness of the
appliance pipe work using a soapy solution. If any
leaks are found they must be rectified
immediately.
6.6 Adjustments
The gas pressure is set for the required heat
input before the appliance leaves the factory.
Provided the gas supply to the air heater is in
accordance with the supply pressure described on
the appliance data plate the operating pressure
will not require adjustment. To check the
pressure, the following procedure should be
carried out:
* Ascertain from section 1 of this document and
the appliance data plate the correct operating
gas pressure for the air heater;
* Turn the room thermostat control to its lowest
setting;
* Remove the screw from the burner pressure
test point of the multi-functional control valve.
Connect a manometer to the test point( see
figure 7);
* Adjust the room thermostat to call for heat e.g.
above room ambient temperature;
* Observe the burner gas pressure on the
manometer and compare to the required
pressure;
* If necessary, adjust the burner gas pressure
(only for natural gas). Remove the cover
screw. Turn the regulator screw anti-clockwise
to decrease pressure or clockwise to increase
pressure (see figure 7);
* Set room thermostat to lowest setting to turn
the burners OFF. Replace the test point screw
(if removed) and with the main burner alight,
test for gas soundness using a soapy solution.
Reset temperature control/room thermostat to
comfort operating level.
Figure 7a : Gas valve types 20-30 Figure 7b : Gas valve types 35-145
1) Shut-off solenoid valve EV1
2a) Adjustment low fire
2b) Adjustment high fire
3) Inlet pressure test point (not visible on fig. 7b)
4) Outlet pressure test point (not visible on fig7b)
5) Shut-off solenoid valve EV2
6) Pilot outlet
7) Main gas outlet
8) Holes (M5) for fixing flanges