– 9 –
SECTION V - UNIT START-UP GENERAL
Before attempting to start the heater read and
understand the the sequence of operations
electrical schematic, ignition module, control
components, gas train, burner and the Digital
Control System user manual.
WARNING: During installation, testing, servicing
and trouble shooting of this product, it may
be necessary to work with live electrical
components. Have a qualified licensed
electrician or other individual who has been
properly trained in handling live electrical
components to perform these tasks. Failure to
follow all electrical safety precautions when
exposed to live electrical components could
result in death or serious injury.
Make sure all manual gas valves are closed.
Make sure all doors and service panels have been
closed or replaced.
Turn main disconnect switch off. Check the incoming
line voltage to match unit rating plate rating. If voltage
is over ±10% of nameplate rating or phase voltage
unbalance is over 2%, notify contractor or power
company.
Fans Are Enabled And Disabled By The Following:
MDT And MRT Standard:
By rotating the remote
“Temperature Setpoint”
knob
(MP-15)
.
Clockwise will
enable
the fans.
Counterclockwise will
disable
the fans.
MRT-PRO With Smart Room Sensor:
To
enable
the fans and place the unit in the Occupied
Mode press the
“Manual On”
button on the face of
the
(TS-02) MRT-PRO
room sensor. Pressing the
“Warmer”
button will add 30-minute increments of
time for a total of 9-hours of operating time. To
disable
the fans and place unit in the Unoccupied Mode press
and hold down the
“Manual On”
button. Alternately
pressing the
“Manual On”
button will also decrease
the amount of operating time until it reaches zero and
turns the fan off.
MRT Expert or VDT Expert With A BACview (KP-01):
To
enable
the fans go to
“Unit Modes”
and enter
[MANUAL]
, this mode will enable the fans.
To also
enable
the fans go to
“Unit Modes”
and enter
[AUTO]
, this mode has four different functions that
control the fans and unit operation. They are a Time
Clock, Heating and Cooling Night Setbacks, and signal
from an external source to an auxiliary digital input.
To disable the fans go to
“Unit Modes”
and enter
[OFF]
.
NOTE: A BACview or PC is required to change Unit
Modes. For a more detailed control sequence see
the (Digital Control System User Manual).
Turn main disconnect switch on and Enable fans.
Damper opens (if applicable). After end switch has
proven damper is open, the blower fan turns on.
(see operating modes in Digital Control System user
manual)
Disable the fans. Check supply blower for proper
rotation.
NOTE: To change rotation of the blower, simply
interchange any two (2) of the line leads of the
motor starter for three (3) phase motors. On single
phase motors refer to motor nameplate.
Enable the fans. Check for proper blower rpm. Check
that all motor amp draws do not exceed rating plate
ratings and overloads are set to motor rating plate
amps.
Check all dampers for proper operation, and linkage
does not bind, see “Sequence of Operation”, and
Digital Control System user manual for damper control
modes.
Disable the fans.
NOTE: Before attempting to light the main burner
you need to review Section X for proper Manifold
and Valve Adjustments. A BACview 6 or PC will be
required to change setpoints.
Check the gas supply pressure by replacing the plug
fi
tting on the gas line with a pressure gauge having
appropriate range, and opening the manual gas
valve. Check that the pressure reading is within the
speci
fi
ed range on the rating plate.
NOTE: To adjust gas pressure on supply lines
where a regulator has been installed (to reduce the
inlet pressure to rating plate maximum pressure),
remove dust cap of main gas regulator and turn
adjusting screw clockwise to increase pressure or
counter-clockwise to decrease pressure.
Connect a DC Microammeter between SENSE
terminal and
fl
ame rod sensing wire.
