Carrier 59MN7A Instruction Manual Page 64
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64
(6.) Turn SW1--2 switch OFF.
(7.) Install blower door.
b. Electronic thermostat: Set cycle rate for 3 cycles per hr.
Check Safety Controls
The flame sensor, gas valve, and pressure switch were all checked
in the Start--up procedure section as part of normal operation.
1. Check Main Limit Switch
This control shuts off combustion system and energizes air--
circulating blower motor, if furnace overheats. By using this
method to check limit control, it can be established that lim-
it is functioning properly and will operate if there is a re-
stricted return--air supply or motor failure. If limit control
does not function during this test, cause must be determined
and corrected.
a. Run furnace for at least 5 minutes.
b. Gradually block off return air with a piece of cardboard or
sheet metal until the limit trips.
c. Unblock return air to permit normal circulation.
d. Burners will re--light when furnace cools down.
2. Check Pressure Switch(es)
This control proves operation of the draft inducer blower.
a. Turn off 115--v power to furnace.
b. Disconnect inducer motor lead wires from wire harness.
c. Turn on 115--v power to furnace.
d. Set thermostat to “call for heat” and wait 1 minute. When
pressureswitch is functioning properly, hot surface igniter
should NOT glow and control diagnostic light flashes a
status code 32. If hot surface igniter glows when inducer
motor is disconnected, shut down furnace immediately.
e. Determine reason pressure switch did not function prop-
erly and correct condition.
f. Turn off 115--v power to furnace.
g. Reconnect inducer motor wires, replace blower door, and
turn on 115--v power.
h. Blower will run for 90 seconds before beginning the call
for heat again.
i. Furnace should ignite normally.
Checklist
1. Put away tools and instruments. Clean up debris.
2. Verify that switches SW1--1 and SW1--6 are OFF and other
setup switches are set as desired. Verify that switches
SW1--7 and SW1--8 for the blower OFF DELAY are set as
desired per Table 17.
3. Verify that blower and control doors are properly installed.
4. Cycle test furnace with room thermostat.
5. Check operation of accessories per manufacturer’s instruc-
tions.
6. Review Owner’s Manual with owner.
7. Attach literature packet to furnace.
ON/OFF Switch
1/2” NPT Outlet
Manifold
Pressure Tap
Inlet
Pressure Tap
Min/Max Heat Adust
(Under Cap)
GAS FLOW
MODULATING
Turn screw 1 click per
second to adjust rate.
Clockwise to increase
rate, counter clockwise
to decrease rate.
A10496
Fig. 50 -- Gas Valve
BURNER
ORIFICE
A93059
Fig. 51 -- Orifice Hole
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
A96316
Fig. 52 -- Amp. Draw Check with Ammeter
59MN7A
- Series 200 1
- IMPORTANT 2
- SAFETY CONSIDERATIONS 3
- INTRODUCTION 4
- CODES AND STANDARDS 4
- ELECTROSTATIC DISCHARGE (ESD) 4
- PRECAUTIONS PROCEDURE 4
- ACCESSORIES 5
- LOCATION 5
- * Recommended 6
- Fig. 1 -- Dimensional Drawing 7
- 18-IN. (457.2 mm) 8
- MINIMUM TO BURNERS 8
- AIR FOR COMBUSTION AND 9
- VENTILATION 9
- CONDENSATE TRAP 11
- (Appearance May Vary) 12
- CONDENSATE DRAIN CONNECTION 16
- Horizontal Orientation 17
- INSTALLATION 19
- Horizontal Installation 20
- Filter Arrangement 20
- Fig. 17 -- Media Filter 22
- UPFLOW DOWNFLOW HORIZONTAL 24
- HORIZONTAL TOP 25
- RETURN NOT 25
- PERMITTED FOR 25
- ANY MODEL 25
- COMBUSTION - AIR PIPE 26
- (SEE VENTING SECTION) 26
- AIR DUCTS 27
- Table7–Cooling 28
- With Filter) 28
- Table 7 -- Cooling 29
- With Filter) (Continued) 29
- GAS PIPING 31
- 115--V Wiring 32
- J--Box Installation 33
- 24--V Wiring 33
- Alternate Power Supplies 34
- 12 and 16 38
- Materials 41
- Venting Systems 41
- Locating the Vent Termination 41
- Guidelines 42
- Configure the Furnace 42
- Pipe Adapter 43
- Vent Coupling and Adapter 49
- Downflow Vertical 51
- HORIZONTAL LEFT 52
- RIGHT VENT CONFIGURATION* 52
- Fig. 41 -- Horizontal Right 53
- TOP PLATE ATTACHMENT 54
- COMBUSTION AIR PIPE 54
- (ATTIC OR CRAWLSPACE ONLY) 54
- Abandoned masonry 57
- (per code) 57
- OVERHANG 58
- 12 in. (304.8mm) MIN. Ground 58
- Level OR Snow Level 58
- Select Setup Switch Positions 60
- Purge Gas Lines 61
- Adjustments 61
- Adjust Temperature Rise 62
- Check Safety Controls 64
- Checklist 64
- 338307-201 Rev. F 65
- A11575 AMV 67
- MODULATING FURNACE 69
- U.S.A. Only 72
- SERVICE AND MAINTENANCE 73
- PROCEDURES 73
- Component Self--Test 74
- Care and Maintenance 74
- Servicing Hot Surface Igniter 77
- WINTERIZATION 78
- Burner Flame 79
- Manifold 79
- Fig. 60 -- Blower Assembly 80
- Fig. 61 -- Burner Assembly 81
- Troubleshootin 82
- SEQUENCE OF OPERATION 85
- (Adaptive Mode) 86
- Maximum Heating 87
- Cooling Mode 87
- Catalog No:59MN7A---04SI 90
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