Step 3—Fan Adjustment Check
This furnace is equipped with a variable speed motor to deliver a
constant airflow. Adjust DIP switches on the electronic board
ACCORDING TO OIL INPUT SELECTED AND A/C SIZE. (See
Tables 11A, 11B, and 11C or Tables 12A, 12B and 12C.)
FIRE HAZARD AND UNIT RELIABILITY
Failure to follow this warning could result in property
damage, personal injury or death.
When operating furnace in heating mode, static pressure and
temperature rise (supply-air temperature minus return-air
temperature) must be within those limits specified on rating
label.
Step 4—Limit Control Check
After furnace has been in operation for at least 15 minutes, restrict
return-air supply by blocking filters or closing return registers and
allow furnace to shut down on high limit. The burner should shut
off, and main blower should continue to run.
Step 5—For Year-Round Air Conditioning
This furnace is designed for use in conjunction with cooling
equipment to provide year-round air conditioning. The blower has
been sized for both heating and cooling, however, fan motor
setting may need to be changed to obtain necessary cooling
airflow.
Step 6—Heating
The blower speed is factory set to deliver required airflow at
normal duct static pressure for 0.75 GAL/HR (US) INPUT for the
58VMR105 size (See Table 11A, 11B, and 11C) and 0.85
GAL/HR (US) INPUT for the 58VMR120 size. (See Table 12A,
12B, and 12C.) The blower motor may be field adjusted to deliver
required airflow for other capacity.
Step 7—Cooling
The blower may be field adjusted to deliver required airflow for
cooling application. (See Table 13 and 14.)
MAINTENANCE
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow this warning could result in possible damage
to this equipment, serious personal injury, or death.
The ability to properly perform maintenance on this equip-
ment requires certain expertise, mechanical skills, tools, and
equipment. If you do not possess these, do not attempt to
perform any maintenance on this equipment other than those
procedures recommended in the User’s Manual.
ELECTRICAL SHOCK HAZARD
Failure to comply with this warning could cause electrical
shock resulting in personal injury or death.
Before performing any service functions, unless operations
specifically require power to be on, make sure all utilities are
turned off upstream of appliance.
Table 11a—58VMR105 Dip Switch Adjustment for
Oil Heating Mode
SW1-HEAT
DIP SWITCH
POSITION
INPUT
USGPH
SW4-DELAY
DIP SWITCH
POSITION
INPUT
USGPH
1 212
OFF OFF 0.75 OFF OFF 0.75
ON OFF 0.65 ON OFF 0.65
OFF ON 0.5 OFF ON 0.5
ON ON N/A ON ON N/A
Table 11b—58VMR105 Size Dip Switch
Adjustments for Heat Pump and Cooling Mode
SW2-COOL
DIP SWITCH POSITION
A/C SIZE
(TONS)
1 2
OFF OFF 3.0
ON OFF 2.5
OFF ON 2.0
ON ON 1.5
Table 11c—58VMR105 Size Dip Switch CFM
Adjustments in All Modes
SW2-ADJUST
DIP SWITCH POSITION
HEATING CFM %
INCREASE OR
DECREASE
COOLING CFM %
INCREASE OR
DECREASE
1 2
OFF OFF 0 0
ON OFF + 13 + 10
OFF ON - 15 - 10
ON ON N/A 0
Table 12a—58VMR120 Dip Switch Adjustment for
Oil Heating Mode
SW1-HEAT
DIP SWITCH
POSITION
INPUT
USGPH
SW4-DELAY
DIP SWITCH
POSITION
INPUT
USGPH
1 212
OFF OFF 0.85 OFF OFF 0.85
ON OFF 1.00 ON OFF 1.00
OFF ON 1.10 OFF ON 1.10
ON ON N/A ON ON N/A
Table 12b—58VMR120 Size Dip Switch
Adjustments for Heat Pump and Cooling Mode
SW2-COOL
DIP SWITCH POSITION
A/C SIZE
(TONS)
1 2
OFF OFF 5.0
ON OFF 4.0
OFF ON 3.5
ON ON 3.0
Table 12c—Dip Switch CFM Adjustments in All
Modes
SW2-ADJUST
DIP SWITCH POSITION
HEATING CFM %
INCREASE OR
DECREASE
COOLING CFM %
INCREASE OR
DECREASE
1 2
OFF OFF 0 0
ON OFF + 13 + 10
OFF ON - 15 - 10
ON ON N/A 0
12
To Next Page
Loading...
