Section 12: User Instructions; User Instructions; Heater Operation; Common User Controls - Roberts Gorden DUAL AIR DAT100 Installation, Commissioning, Operation & Service Manual

SECTION 12: USER INSTRUCTIONS

12.1 User Instructions

®
The DualAir units are fully automatic and operate
from the external controls fitted on site.
The only user controls at the heater are the:
Burner lockout reset button:
...................................See Page 26, Section 12.3.3
Limit thermostat reset:
.................................... See Page 25, Section 12.3.1
Second limit thermostat reset button:
...................................See Page 25, Section 12.3.2

12.2 Heater Operation

When the heater has been switched on by the
remote controls installed, the main burner will
automatically turn on.
The burner control box will control the ignition of the
flame.
All heaters require a constant gas and electricity
supply which must not be interrupted during the
normal operation of this heater.
12.2.1 Warning Lights
®
The DualAir unit has three warning lights;
GREEN = Heater ON, burner attempting to fire
RED = Burner LOCKOUT, see Section 12.3.3.
AMBER = Dirty Filter, replace filter, air flow is
dropping to an unacceptably low value.

Figure 14: Heater Operating Sequence

12.3 Common User Controls

12.3.1 Combination Fan/Limit Thermostat
The Combination Fan/Limit Thermostat is located
inside the access door at the top of the heater. See
Page 38, Section 16.3.
This control ensures the heater does not blow cold
air in the normal heating cycle and protects the heat
exchanger against overheating.

Figure 15: Fan/Limit Thermostat

If the air flow is reduced due to power failure the
limit thermostat will cause the burner to lockout.
The combination fan/limit thermostat is preset
during commissioning.
See Page 7 , Section 4.3 and Page 8, Figure 4.4.
NOTE: To reset, the heat exchanger must be cool.
Description
Combination Fan/Limit Thermostat
12.3.2 Secondary Limit Thermostat
These are hand reset devices to give further
protection against fan failure.
NOTE: To reset, the heat exchanger must be cool.
Description
Secondary Limit Thermostat
SECTION 12: U I
SER NSTRUCTIONS
Part Number
K017A
Part Number
90412100
25