Horizontal Installations; Startup Procedure & Adjustment - Amana MVM97 Installation Instructions Manual

FILTER
ACCESS
DOOR
RETURN
DUCT
FILTER
SUPPORT
BRACKET
(Field Supplied)
AIR FLOW
Possible Upright Counterflow Filter Locations

Horizontal Installations

Filters must be installed in either the central return regis-
ter or in the return air duct work.
Startup Procedure & Adjustment
Furnace must have a 115 VAC power supply properly
connected and grounded. Proper polarity must be main-
tained for correct operation. In addition to the following
start-up and adjustment items, refer to further informa-
tion in Operational Checks section.
100%
IGNITION
(80%)
78%
57%
2 MINS.
MIN.
Operation with Conventional 1-Stage Thermostat
(DIP switch selects 1-Stage heat)
Call for heat, thermostat energizes W1 on the furnace
control board (W2 input is ignored).
After a successful Light Off Sequence and expiration of
the Ignition Stabilization Period:
• The furnace control board adjusts the firing rate to
35% (low fire rate).
CENTRAL
RETURN
GRILLE
Figure 44
UNIT CALL FOR HEAT ENDS
10 MINS.
8 MINS.
Figure 45
• After 2 minutes, the furnace control board increases
the firing rate to 57% at a rate of 1% per second.
• After 10 total minutes, the furnace control board
increases the firing rate to 78% at a rate of 1% per
second.
• After 20 total minutes, the furnace control board
increases to 100% at a rate of 1% per second for the
remainder of the call for heat.
• The circulator fan is adjusted to the appropriate CFM,
corresponding to the current firing rate.
IGNITION
(80%)
70%
60%
50%
2 MINS.
MIN.
Operation with Conventional 2-Stage Thermostat
(DIP switch selects 2-stage heat)
Call for 1st-Stage Heat - Thermostat contacts close R to
W1.
After a successful Light Off Sequence and expiration of
the Ignition Stabilization Period:
• The furnace control board adjusts to the low firing
rate.
• After 2 minutes, the furnace control board increases
the firing rate to 50% for the next 8 minutes.
• Thereafter, the furnace control board will increase
the firing rate 10%, at a rate of 1% per second, every
10 minutes for the remainder of the call for heat (See
above figure).
• The circulator fan is adjusted to the appropriate CFM,
corresponding to the current firing rate.
90%
IGNITION
(80%)
70%
60%
50%
2 MINS.
MIN.
Operation with Conventional 2-Stage Thermostat
(DIP switch selects 2-stage heat)
10 MINS.
8 MINS.
Figure 46
10 MINS.
8 MINS.
Figure 47