830CA: Installation, Start–Up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
25
A180231
Fig. 40 – Gas Control Valve
A180238
Fig. 41 – Orifice Hole
7. Set thermostat heat anticipator.
a. Mechanical thermostat - Set thermostat heat anticipator to match
the amp. draw of the electrical components in the R-W/W1
circuit. Accurate amp. draw readings can be obtained at the wires
normally connected to thermostat subbase terminals, R-W. The
thermostat anticipator should NOT be in the circuit while
measuring current.
(1.) Remove thermostat from subbase or from wall.
(2.) Connect an amp. meter as shown in
. across the R
and W subbase terminals or R and W wires at wall.
A96316
Fig. 42 – Amp. Draw Check With Ammeter
(3.) Record amp. draw across terminals when furnace is in low
heat and after blower starts when furnace is heating and
after blower starts.
(4.) Set heat anticipator on thermostat per thermostat
instructions and install on subbase or wall.
(5.) Install blower access door.
b. Electronic thermostat: Set cycle rate for 4 cycles per hr.
8. Set Airflow for Air Conditioning -Single Stage and High Stage
Cooling
The ECM blower can be adjusted for a range of airflow for Low
Speed or High Speed cooling.
-Air Delivery - CFM (With
Filter). Depending on the model size, the cooling airflow can be
adjusted from 1.5 to 6 tons based on 350 CFM/ton.
The cooling airflow is adjusted by turning Setup switches SW2-1,
SW2-2 and SW2-3 either ON or OFF. Select the required airflow
from
.
is based on 350 CFM per ton. For airflow at
400 CFM per ton, turn Setup SW1-5 ON, see
and
NOTE:
5.5 ton airflow will truncate at 2200 cfm on applicable models.
For a complete explanation of cooling airflow, refer to the section titled
“Sequence of Operation.”
9. Set Airflow for Continuous Fan/Low Speed Cooling Airflow The
ECM blower motor can be adjusted for continuous fan speeds
different than heating or cooling fan speed. See
Delivery - CFM (With Filter). Select the required continuous fan
.
The continuous fan speed is also the switch setting for low speed
cooling when furnace is used with a 2-speed cooling unit. Adjust
the continuous fan CFM to match the airflow required for low
speed cooling. Select the required airflow from
. For airflow
at 400 CFM per ton, turn Setup SW1-5 ON, see
. The
airflow selected for low speed cooling will also be the airflow used
for continuous fan.
The continuous fan speed can be further adjusted at the thermostat
using the “Comfort Fan” select function. Changing the continuous
fan speed at the thermostat DOES NOT change the low speed
cooling airflow selected at the control board.
CAUTION
!
FURNACE OVERHEATING HAZARD
Failure to follow this caution may result in reduced furnace life.
Recheck temperature rise. It must be within limits specified on the
rating plate. Recommended operation is at the mid-point of rise range
or slightly above.
GAS OUTPUT
GAS INPUT
ON & OFF TOGGLE
INLET PRESSURE TAP SET
SCREW: 3/32” HEX HEAD.
ACCEPTS 5/16” HOSE
CONNECTION
GAS VALVE OUTLET
PRESSURE TAP
SET SCREW:
3/32” HEX HEAD.
ACCEPTS 5/16” HOSE
CONNECTION
1/2” NPT
OUTLET
1/2” NPT
INLET
REGULATOR
ADJUSTMENT
CAP (REGULATOR
ADJ. UNDER CAP)
BURNER
ORIFICE
R
Y W
G
10 TURNS
THERMOSTAT SUBBASE
TERMINALS WITH
THERMOSTAT REMOVED
(ANITICIPATOR, CLOCK, ETC.,
MUST BE OUT OF CIRCUIT.)
HOOK-AROUND
AMMETER
EXAMPLE:
5.0 AMPS ON AMMETER
10 TURNS AROUND JAWS
=
0.5 AMPS FOR THERMOSTAT
ANTICIPATOR SETTING
FROM UNIT 24-V
CONTROL TERMINALS