CONTROL OPTIONS

CONTROL OPTIONS
Page Number _______ of ______
CONTROL OPTIONS
IGNITION CONTROL OPTIONS STANDARD EQUIPMENT
INTERMITTENT SPARK PILOT: Automatic lighting of pilot with an electronic
spark on a call for heat. Pilot gas flow is shut off between heat cycles. Certified by the Canadian Standards Association for use in Canada with natural gas only. Certified for use in the U.S.A. on outdoor
units with natural gas or propane.
OPTION AH3 INTERMITTENT SPARK PILOT WITH TIMED LOCKOUT: Automatic lighting of pilot with an
electronic spark on a call for heat. Pilot gas flow is shut off between heat cycles. This system also
incorporates a lockout device which stops gas flow to the pilot if the pilot fails to light in 120 seconds.
Reset of lockout requires manual interruption of the thermostat cycle. Approved for use with natural
or propane gas.
GAS CONTROLS
Applies to Models RPB, RPBL, RPDBL, PGBL, SSCBL and SSCDBL unless otherwise noted.
Reznor
Option
Code
AG1
AG2
AG7
AG10
AG11
Reznor
Option
Code
AG3
AG4
AG5
AG8
AG9
AG15
AG16
AG17
AG18
AG19
AG20
AG21
AG22
AG23
AG39
AG40
AG41
AG42
SPACE HEATING
APPLICATIONS
HEATING ONLY APPLICATIONS GAS CONTROLS
Model Numbers
RPB RPBL PGBL SSCBL
RPDBL
SSCDBL
STD
STD
STD
STD
STD
STD
X
N/A
N/A
N/A
N/A
N/A
X
X
X
X
X
X
N/A
X
X
X
X
X
N/A
X
X
X
X
X
MAKEUP AIR APPLICATIONS GAS CONTROL
Model Numbers
RPB
X
N/A
N/A
X
X
X
X
N/A
N/A
N/A
N/A
X
N/A
N/A
X
X
N/A
N/A
RPBL
X
X
X
X
X
X
X
X
X
X
X
X
N/A
N/A
X
X
X
X
PGBL
X
X
X
X
X
X
X
X
X
X
X
X
N/A
N/A
N/A
N/A
N/A
N/A
SSCBL
X
X
X
X
X
X
X
X
X
X
X
X
N/A
N/A
X
X
X
X
RPDBL
X
X
N/A
X
X
X
X
X
X
N/A
N/A
X
X
X
N/A
N/A
N/A
N/A
SSCDBL
X
X
N/A
X
X
X
X
X
X
N/A
N/A
X
X
X
N/A
N/A
N/A
N/A
Option AG1 ONE-STAGE CONTROL: Single-stage gas valve which cycles on at 100% fire on a call for heat
by a remote single-stage thermostat. Thermostat is not included.
Option AG10 ONE-STAGE CONTROL for units with one, two or three furnace sections: Each furnace is
equipped with single-stage gas valve and relay. Each furnace cycles on at 100% fire on call for heat
from remote single-stage thermostat. Thermostat is included. (Does not apply to Model RPB)
Option AG2 TWO-STAGE CONTROL: Two-stage gas valve which fires at 100% or 50%, as required, on call
by a remote two-stage thermostat. Thermostat is not included. (RPB Only).
Option AG11 TWO-STAGE HEATING CONTROL for units with one, two or three furnaces: Each furnace
is equipped with a two-stage gas valve and relay. Two-stage gas valves fire at 100% or 50% as
required, on call from remote two-stage thermostat. Thermostat is included. (Does not apply to
Model RPB)
Option AG7 ELECTRONIC MODULATION (60°-85°F): Solid state control system, providing close tempera-
ture control via manifold pressure. On a call for heat from a remote electronic thermostat, controls
modulate between 50% and 100%. Remote thermostat is included.
Form C-AH Page 22
Page Number _______ of ______
CONTROL OPTIONS (cont’d)
MAKEUP AIR HEATING
APPLICATIONS
Option AG3 TWO-STAGE CONTROL FROM DUCTSTAT (60°-110°F): Two-stage gas valve which fires at
100% or 50% as required, on call from a unit-mounted, two-stage ductstat. For units with two furnace
sections, Option AG3 includes a two-stage valve on each furnace and two ductstats which provide for
FOUR-STAGE CONTROL. For units with three furnace sections, Option AG3 includes a two-stage
valve on each furnace and three ductstats which provide for SIX-STAGE CONTROL*.
Option AG15 ELECTRONIC TWO-STAGE CONTROL USING DUCTSTAT (50°-130°F) WITH REMOTE
TEMPERATURE ADJUSTMENT: Same type of control as Option AG3, but the setpoint of the ductstat is adjustable from a remote temperature-selector. Includes factory-installed sensor and fieldinstalled temperature-selector module with an adjustable stage-adder module. For Model RPBL
packages with two furnace sections, Option AG15 includes a two-stage valve on each furnace and
ductstat which provides for FOUR-STAGE CONTROL. Includes factory-installed sensor and fieldinstalled remote temperature-selector module with three adjustable stage-adder modules. For units
with three furnace sections, Option AG15 includes a two-stage valve on each furnace and ductstat
which provides for SIX-STAGE CONTROL. Includes factory-installed sensor and field-installed remote temperature-selector module with five adjustable stage-adder modules.*
Option AG16 ELECTRONIC TWO-STAGE CONTROL USING DUCTSTAT (50°-130°F) WITH REMOTE
TEMPERATURE ADJUSTMENT AND TEMPERATURE DISPLAY: Same as Option AG15, plus a
digital (liquid crystal) temperature-display module that provides selectable set point and continuous
display of sensor reading.*
Option AG4 TWO-STAGE CONTROL FOR UNITS WITH TWO (2) FURNACES: Each furnace is equipped
with a single-stage gas valve. The gas valves are staged by a unit-mounted, two-stage ductstat (60°110°F). The furnace nearest the blower is staged first and the downstream furnace is staged second.
Applicable only to packaged systems with two furnace sections.* (Does not apply to Model RPB)
Option AG17 ELECTRONIC TWO-STAGE CONTROL FOR RPBL WITH TWO (2) FURNACE SECTIONS
USING A DUCTSTAT (50°-130°F) WITH REMOTE TEMPERATURE ADJUSTMENT: Same type of
control as Option AG4, but the ductstat has a remote temperature selector. Includes factory-installed
sensor and field-installed remote temperature-selector module with an adjustable stage-adder module.* (Does not apply to Model RPB)
Option AG18 ELECTRONIC TWO-STAGE CONTROL FOR UNITS WITH TWO (2) FURNACE SECTIONS
USING A DUCTSTAT (50°-130°F) WITH REMOTE TEMPERATURE ADJUSTMENT AND TEMPERATURE DISPLAY: Same as Option AG17, plus a digital (liquid crystal) temperature-display module
that provides selectable set point display and continuous display of sensor reading.* (Does not apply to Model RPB)
Options AG15, AG16, AG17, AG18, AG19, AG20
Options AG3, AG4, AG5
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A = Ductstat Temperature Module P/N
115848
B = Stage Adder Module, P/N 115849
(quantity varies - see Option description)
C = Digital Temperature Display Module,
P/N 115852 (Options AG16, AG18 and
AG20 only)
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Unit-Mounted Ductstat P/N 41700 (quantity varies - see Option description)
*APPLICATION NOTE: If the installation of a packaged unit with more than one
furnace section requires that any of the controls in this table be used in conjunction with an override thermostat, additional factory-installed relays are
required. Since this application is not covered by “normal” control sequence,
the additional relays (Option BG2) must be specified.
MINIMUM QUANTITY OF
RELAYS (Option BG2)
REQUIRED WHEN:
∙ Pkg Model w/2, 3 or 4 furnaces
∙ with AG Option Listed (right)
∙ plus Overide Thermostat
Models
PGBL, RPBL,
SSCBL
RPDBL,
SSCDBL
PGBL, RPBL,
SSCBL
RPDBL,
SSCDBL
AG15, AG17,
AG16 AG18
AG19
AG20
Size
500, 600,
700, 800
AG3
AG4
AG5
4
2
N/A
4
2
N/A
800
4
2
N/A
4
2
N/A
1050, 1200
6
N/A
3
6
N/A
3
1000, 1200,
1400, 1600
8
N/A
4
8
N/A
4
Form C-AH Page 23
Page Number _______ of ______
CONTROL OPTIONS (cont’d)
MAKEUP AIR HEATING
APPLICATIONS (cont’d)
Option AG5 THREE-STAGE CONTROL FOR UNITS WITH THREE (3) FURNACES: Each furnace is
equipped with a single-stage gas valve. The gas valves are staged in sequence by two (2) unitmounted, two-stage ductstats (60°-110°F). The furnace nearest the blower is staged first, the center
furnace is staged second, and the downstream furnace is staged last. Applicable only to packaged
systems with three furnace sections.* (Models RPBL, PGBL and SSCBL only)
Option AG19 ELECTRONIC THREE-STAGE CONTROL FOR UNITS WITH THREE (3) FURNACE SEC-
TIONS USING A DUCTSTAT (50°-130°F) WITH REMOTE TEMPERATURE ADJUSTMENT: Same
type of control as Option AG5, but the ductstat has a remote temperature selector. Includes factoryinstalled sensor and field-installed remote temperature-selector module with two adjustable stageadder modules.* (Models RPBL, PGBL and SSCBL only)
Option AG20 ELECTRONIC THREE-STAGE CONTROL FOR UNITS WITH THREE (3) FURNACE SEC-
TIONS USING A DUCTSTAT (50°-130°F) WITH REMOTE TEMPERATURE ADJUSTMENT AND
TEMPERATURE DISPLAY: Same as Option AG19, plus a digital (liquid crystal) temperature-display
module that provides selectable set point and continuous display of sensor reading.* (Models RPBL,
PGBL and SSCBL only)
Option AG22 ELECTRONIC FOUR-STAGE CONTROL FOR UNITS WITH FOUR (4) FURNACE SECTIONS
USING A DUCTSTAT (50°-130°F) WITH REMOTE TEMPERATURE ADJUSTMENT: Same type of
control as Option AG5, but the ductstat has a remote temperature selector. Includes factory-installed
sensor and field-installed remote temperature-selector module with two adjustable stage-adder modules.* (Models RPDBL and SSCDBL only)
Option AG23 ELECTRONIC FOUR-STAGE CONTROL FOR UNITS WITH FOUR (4) FURNACE SEC-
TIONS USING A DUCTSTAT (50°-130°F) WITH REMOTE TEMPERATURE ADJUSTMENT AND
TEMPERATURE DISPLAY: Same as Option AG22, plus a digital (liquid crystal) temperature-display
module that provides selectable set point and continuous display of sensor reading.* (Models RPDBL
and SSCDBL only)
Option AG8 ELECTRONIC MODULATION (55°-90°F) WITH DUCTSTAT: Solid state control system, provid-
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Option AG9 ELECTRONIC MODULATION (55°-90°F) WITH DUCTSTAT AND REMOTE TEMPERATURE
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ing close temperature control through regulated manifold pressure. On a call for heat from a unitmounted ductstat, controls modulate between 50% and 100%, as required. Units with two or three
furnace sections include an outside air controller. When setpoint temperature is reached, one or two
furnaces will be shut down providing 25% minimum system firing rate with two furnaces and 16-2/3%
minimum with three furnaces. A room override thermostat (Option CL9) is available for use with this
system. Temperature range 55° - 90°F.
SELECTION: Control is the same as Option AG8 except that the duct sensor setpoint may be reset
from a remote selector. Units with two or three furnace sections include an outside air controller.
When setpoint temperature is reached, one or two furnaces will be shut down providing 25% minimum system firing rate with two furnaces and 16-2/3% minimum with three furnaces. Remote temperature selector is included. A room override thermostat (Option CL9) is available for use with this
system. (See illustration)
AG21 ELECTRONIC MODULATION WITH DDC CONTROL: Used with customer-supplied 4-20MA or 010V input signal. Includes Maxitrol A200/SC10C-B6S1 signal conditioner and special modulating
gas regulator.
*APPLICATION NOTE: If the installation of a packaged unit with more than one
furnace section requires that any of the controls in this table be used in conjunction with an override thermostat, additional factory-installed relays are
required. Since this application is not covered by “normal” control sequence,
the additional relays (Option BG2) must be specified.
Duct Sensor
Form C-AH Page 24
CONTROL OPTIONS (cont’d)
MAKEUP AIR HEATING
APPLICATIONS (cont’d)
Page Number _______ of ______
Option AG39 ELECTRONIC MODULATION (SEE FIRING RATE TURNDOWN PERCENT IN TABLE BELOW): (Available with natural gas only on Model RPB Sizes 125-300 and Models RPB/RPBL/
SSCBL Size 400)
Description
● Reznor ® Option AG39 (patent pending) is an electronic modulation gas control that will provide precise
control of discharge air temperature over an increased range of outside air conditions. It is now available on
selected Models of Reznor gas furnaces.
● This option allows the furnace input ratio to be fully modulated between 100% and 28 to 20%.
● The part-load thermal efficiency of this system complies with and exceeds the current seventy-five percent
minimum requirement of ASHRAE standard 90.1 for part-load efficiencies. This system offers an average
thermal efficiency over the range of modulation that is equal to or exceeds the full input rate thermal efficiency.
● Furnaces with Option AG39 require stainless steel burners, a stainless steel heat exchanger, and a stainless
steel bottom pan. The gas train includes a single-stage gas valve, a modulating valve, and two gas pressure
switches. The burner rack is equipped with one flash carry-over and a regulated gas lighter tube system.
The carry-over lighter tube receives its gas supply through the regulator, simultaneously with the gas to the
burner. Control of the system is through a Maxitrol #A1092 amplifier with a corresponding remote temperature dial (Maxitrol® #TD92-0509).
Sensor Location
● The duct temperature sensor is factory installed in the cabinet leg. Although the sensor has a mixing tube,
at this distance from the discharge it does not receive a true mix, so the temperature read by the sensor will
be slightly higher than the actual air entering the ductwork. The system will provide comfort level heat if the
selector is set slightly lower to compensate for this reading. The offset temperature will vary with the application. If a direct correlation of these two temperatures is required, move the duct sensor to a location in the
ductwork about 10-12 feet from the furnace discharge.
Sample Specification
● The unit shall have electronic modulation offering at least full modulation to 28% of full fire (capacity) input
rate.
● Modulating gas control shall be certified by CSA for use in The United States and Canada.
● The furnace shall maintain an average thermal efficiency over the range of modulation that is equal to or
exceeds the full input rate thermal efficiency.
● The furnace shall ignite at any fire rate within its modulation range, not just high fire on start.
Option AG40 ELECTRONIC MODULATION (SEE FIRING RATE TURNDOWN PERCENT IN TABLE BE-
LOW) WITH DDC CONTROL: Same system as AG39 but includes signal conditioner for use with
customer-supplied 4-20MA or 0-10V input signal. (Available with natural gas only on Model RPB
Sizes 125-300 and Models RPB/RPBL/SSCBL Size 400)
Option AG41 ELECTRONIC MODULATION (SEE FIRING RATE TURNDOWN PERCENT IN TABLE BELOW) FOR RPBL UNITS WITH TWO (2) OR THREE (3) FURNACES: Same system as AG39 (electronic modulation gas control on the first furnace) with a two-stage with outside air temperature
control on the other(s). (Available on Models SSCBL/RPDBL sizes 500 - 1200)
Option AG42 ELECTRONIC MODULATION (SEE FIRING RATE TURNDOWN PERCENT IN TABLE BELOW) WITH DDC CONTROL FOR RPBL UNITS WITH TWO (2) OR THREE (3) FURNACES: Same
system as AG40 (electronic modulation gas control on the first furnace with signal conditioner for use
with customer-supplied 4-20MA or 0-10V input signal) with a two-stage with outside air temperature
control on the other(s). (Available on Models SSCBL/RPDBL sizes 500 - 1200)
Options AG39 and 40 are
available on:
Model
Size
RPB
125
RPB
150
RPB
175
RPB
200
RPB
225
RPB
250
RPB
300
RPB/RPBL/SSCBL
400
Options AG39 and 40 are
available on:
Model
Size
RPBL/SSCBL
500
RPBL/SSCBL
600
RPBL/SSCBL
800
RPBL/SSCBL
1200
Maximum
Trundown
Percent
20%
27%
23%
26%
23%
28%
23%
25%
Maximum
Trundown
Percent
14%
11.5%
12.5%
8.3%
Input Range
MBH
kW
25 - 125
7.3 - 36.6
40.3 - 150
11.8 - 44
40.3 - 175
11.8 - 51.3
51.8 - 200
15.2 - 58.6
51.8 - 225
15.2 - 65.9
69 - 250
20.2 - 73.3
69 - 300
20.2 - 87.9
100 - 400
29.3 - 117.2
Gas Supply Pressure
Required
5” w.c.
12.5 mbar
5” w.c.
12.5 mbar
5” w.c.
12.5 mbar
5” w.c.
12.5 mbar
5” w.c.
12.5 mbar
5” w.c.
12.5 mbar
5” w.c.
12.5 mbar
6” w.c.
14.9 mbar
Input Range
MBH
kW
70 - 500
20.5 - 146.5
69 - 600
20.2 - 175.9
100 - 800
29.3 - 234.5
100 - 1200
29.3 - 351.7
Gas Supply Pressure
Required
5” w.c.
12.5mbar
5” w.c.
12.5mbar
6” w.c.
14.9 mbar
6” w.c.
14.9 mbar
Form C-AH Page 25
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