Ventilation; Start-Up And Adjustment; Start-Up Procedure; Shut Down Procedure - Nordyne M2RC-080 Installation Instructions Manual

VENTILATION
Ventilation must be provided for homes built to
HUD Manufactured Homes Safety and Con-
struction Standards. This ventilation can be
supplied by the VentilAire III or VentilAire IV
accessories (see Table 13). Alternate means
to provide the ventilation air must meet the
requirements of all applicable local and federal
codes.
For downfiow models, a bracket is supplied
with the furnaces to allow the use of the VentilAire
III or VentilAire IV accessories. The bracket is
installed on the right hand side at the top of the
cabinet, as shown in Figure 27. The bracket
can be fastened using the self-drilling screws
supplied with the unit.
For upfiow models, the means to provide the
required ventilation must be incorporated into
the upflow furnace base or the return air
ductwork to the furnace.
For installation of the VentilAire III or IV, follow
the instructions provided with the VentilAire kit.
START-UPANDADJUSTMENTS
General
Prior to start-up, verify that:
.
The line voltage power leads are securely
connected, that the polarity of the con-
nections is correct, and that the furnace
is properly grounded.
2.
3,
The thermostat wires (R, W, Y, and G) are
securely connected to the correct leads
on the terminal strip of the circuit board.
The natural gas line service pressure must
not exceed 10.0 in. water column (0.36
psig), and must not be less than 4.5 in. water
column (0.16 psig). For LP gas the line
service pressure must not exceed 14 in.
water column (0.51 psig), and must not be
less than 11.0 in. W.C. (0.40 psig).
4,
26
The roll-out and vent safety manual reset
switches are closed. If necessary, press
the red button to reset a switch. See
Figure 31 for location. DO NOT install a
jumper wire across a switch to defeat its
function. If a switch reopens on start-up,
DO NOT reset the switch without identi-
fying and correcting the fault condition
which caused the switch to trip.
5. The blower door is in place, closing the
door switch in the line voltage circuit.
6. The gas line has been purged and all
connections are leak tight.
Start-Up Procedure
1. Set the thermostat to the lowest setting.
2. Close the disconnect(s) to provide line
voltage to the furnace.
3. Follow the procedures given on the oper-
ating instructions label attached to the
furnace.
4. Set the thermostat above room tempera-
ture and verify the sequence of operation.
(See the SEQUENCE OF OPERATION.)
5,
After the furnace has run for approximately
five minutes, set the thermostatbelow room
temperature and verify steps 9 - 11 of the
SEQUENCE OF OPERATION.
Shut Down Procedure
In the event that the furnace must be shut down,
follow this procedure:
1. Set the room thermostat to "OFF" or its
lowest temperature setting.
2.
,
Turn OFF the main gas supply to the
appliance at the manual valve outside of
the appliance casing.
Remove the control access panel / Iou-
vered door.
4. Move the appliance gas valve lever/knob
to the "OFF" position.
5. Turn OFF the electrical power to the
....._lSpli_+n_:e.
Verifying and Adjusting Firing Rate
The firing rate must be verified for each instal-
lation to prevent over-fldng the furnace.
NOTE: The firing rate must not exceed the
rate shown on the furnace rating plate. At
altitudes above 2000 ft. it must not exceed
that on the rating plate less 4% for each
1000 ft.
Use the following procedure to determine the
firing rate:
1. Shut off all other gas fired appliances.