Orizontal Nstallations; Startup Procedure & Adjustment - Goodman *MVM96 Installation Instructions Manual

FILTER
ACCESS
DOOR
RETURN
DUCT
FILTER
SUPPORT
BRACKET
(Field Supplied)
Possible Upright Counterflow
Filter Locations
H I
ORIZONTAL NSTALLATIONS
Filters must be installed in either the central return register or in
the return air duct work.
S P
TARTUP ROCEDURE
Furnace must have a 115 VAC power supply properly connected
and grounded. Proper polarity must be maintained for correct
operation. In addition to the following start-up and adjustment
items, refer to further information 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 con-
trol 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).
• 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.
CENTRAL
RETURN
GRILLE
AIR FLOW
& A
DJUSTMENT
UNIT CALL FOR HEAT ENDS
10 MINS.
8 MINS.
• 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%
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%
MIN.
Operation with Conventional 2-Stage Thermostat
(DIP switch selects 2-stage heat)
37
10 MINS.
8 MINS.
2 MINS.
10 MINS.
8 MINS.
2 MINS.