SERIES 92 Amplifier

A1092

Modulator Valves

Pipe Sizes:M420........................3/8” & 1/2”M520........................1/2” & 3/4”M620.........................3/4” & 1”

Remote Temperature Selector

TD92-0509 - (50° to 90°F)

Discharge Temperature Sensors: use with Mixing Tube

TS194Q

Mixing Tubes: use with Sensor

Lengths:MT1-9 or 2-9........................9”MT1-12 or 2-12 ................. 12”MT1-23 or 2-23 ................ 23”MT1-28 or 2-28 ................. 28”MT1-57.............................. 57”

Temperature Sensor

TS394-3B-48FQ

OPTIONAL: Room Override Thermostat

T115

The Selectra Series 92 system is used to obtain higher turndown on indirect fired applications.

Selectra systems maintain stable, precise temperatures. A significant improvement over mod motors and butterfly valves - M/MR valves provide instantaneous response and continual pressure adjustment.

The TD92-0509 remote temperature dial controls a 50° to 90°F range. It is similar in design to our popular TD94, but with no digital readout. It has a 6-place terminal block for lead connections. The A1092/A1192 amplifier functions similarly to an A1094, but uses standard wires (4) to connect to the TD92 instead of ribbon cable. Maximum recommended wire length is 300ft.

Duct temperature sensing is by 1,000 ohm RTD such as TS394-3B-48FQ or TS194Q (w/mixing tube).

An optional T115 room override thermostat, when used in conjunction with the remote temperature selector, provides space temperature control by raising the discharge air temperature to a pre-selected point.

Upon request, Maxitrol can configure Series 92 components for other desired temperature control ranges.

Pressure Limits for M420, M520, M620Maximum Discharge Pressure............................7” w.c. (1.7 kPa)Maximum Operating Inlet Pressure......................1.0 psi (7 kPa)Maximum Emergency Exposure*...........................3.0 psi (21 kPa)*May not function properly at this pressure, but will suffer no internal damage.

Power SupplyA1092: Independent 24 VAC, 40VA, 50/60 Hz Class II transformerA1192 Independent 24 VAC, 100VA, 50/60 Hz Class II transformer

NOTE: Transformer must have sufficient rating to cover amperage load.

GasesSuitable for natural, manufactured, mixed gases, liquified petroleum gases, and LP gas-air mixtures.

VentM420, M520, M620: Vertical vent outlet 1/8” NPT - 12A06 installed

Electronic Gas Modulation System

DESCRIPTION

Series 92

SPECIFICATIONS

1© 2012 Maxitrol Company, All Rights Reserved.

SYSTEM COMPONENTS

NOTICE

Maxitrol vent limiting devices eliminate the need to run vent piping to the outside. Vent limiting devices are designed for use indoors and in spaces where limiting the amount of gas escapement due to diaphragm failure is critical. Vent limiting devices should not be used outdoors if they are exposed to the environment. Vent protector 13A15 is available for all outdoor applications to ensure proper vent protection.

2© 2012 Maxitrol Company, All Rights Reserved.

Series 92 Electronic Gas Modulation System

See Bulletin MMR_MT_EN for additional M/MR valve information

NOTE: Low Fire Adjustment should be checked whenever High Fire Adjustment is changed.

High Fire AdjustmentsRotate selector dial to maximum temperature setting.

NOTE: Voltage to the valve must be at least 18VDC.

Adjust separate pressure regulator to obtain desired manifold pressure.

Low Fire AdjustmentsDisconnect a wire from M valve terminal block.

NOTE: Be careful not to allow wire to come in contact with any other part.

Remove by-pass cap (A) and turn screw (B) using small screwdriver to desired low fire adjustment. (See Figure 1)

NOTE: Clockwise Screw rotation reduces flow rate. Do not overtighten.

VALVE ADJUSTMENT

Ambient LimitsOperating: 32° to 131°F (0° to 55°C)Non Operating: -4° to 158°F (-20° to 70°C)

ModificationsModels M420, M520, M620 are available as “W” models - indicates covered wire terminal connections.

Models M420, M520, M620 are available with side pressure tap for reading outlet pressure - on side opposite of minimum adjustment mechanism.

Valve Mounting Valve must be mounted in upright position in horizontal pipe run, downstream of all other controls except high pressure cut-off switch if used.

Optional T115 Room Override ThermostatAs an optional component, an independent room override adjustment can be provided to permit setting of the override temperature from 0° to 40°F above the TD92 setpoint. The T115 override thermostat senses room temperature and resets the discharge air to a higher temperature whenever the sensed temperature falls below the T115 setting.

The standard configuration is to connect the T115 override thermostat to the TD92 remote temperature dial. In some cases it may be more convenient to connect the T115 to the A1092 amplifier. The T115 may be connected directly by removing the jumper on the amplifier’s input terminal block and connecting the T115 in its place. The jumper must then be installed across the TD92’s override terminals for proper operation. See Wiring Diagrams (Figures 2 - 8).

SPECIFICATIONS (cont.)

Figure 1: Valve Adjustment© 2012 Maxitrol

© 2012 Maxitrol

B

A

WIRING DIAGRAMS

Figure 2: Standard Connection of A1092 without Override Thermostat

JUMPER NOT REQUIRED ACROSS TERMINALS 11 & 12

3© 2012 Maxitrol Company, All Rights Reserved.

Series 92 Electronic Gas Modulation System

WIRING DIAGRAMS (cont.)

Figure 3: Standard Connection of Override Thermostat to A1092

Figure 4: Optional Connection of Override Thermostat to A1092

Figure 5: A1192 Independent Power SupplyFigure 7: A1092 Independent Power Supply

Figure 8: A1092 Common Power SupplyFigure 6: A1192 Common Power Supply

© 2012 Maxitrol

© 2012 Maxitrol

© 2012 Maxitrol© 2012 Maxitrol

© 2012 Maxitrol© 2012 Maxitrol

JUMPER REQUIRED ACROSS TERMINALS 11 & 12

JUMPER REQUIRED ACROSS TERMINALS 5 & 6

Maxitrol Company 23555 Telegraph Rd., P.O. Box 2230 Southfield, MI 48037-2230 U.S.A.

www.maxitrol.com © 2012 Maxitrol Company,

All Rights Reserved.

4

SEL92_MS_EN_07.2012

Series 92 Electronic Gas Modulation System

DIMENSIONS

Valve Dimensions Model

NumberSwing Radius

DimensionsA B C D

M420 3.1” (79 mm)

3.9”(100 mm)

2.0”(51 mm)

2.1” (54 mm)

0.9”(24 mm)

M520 4.3” (109 mm)

5.3”(135 mm)

3.25” (83 mm)

3.4”(86 mm)

1.2”(30 mm)

M620 5.7”(146 mm)

7.1” (180 mm)

3.9” (99 mm)

4.0”(102 mm)

1.5”(37 mm)

NOTE: Dimensions are to be used only as an aid in designing clearance for the valves. Actual production dimensions may vary somewhat from those shown.

4.68(165.7)

TYP.

2.96(105)TYP.

2.56(90.6)TYP.

1.69(59.8)TYP.

1.41(49.9)TYP.

3.46 (122.5)3.25 (115.1)

6050 8070 90

R

50

60

40

80

70

°F

90

2.25

7.50

3.38(85.9)CENT.

1.89 TYP.

(48.0) (57.2)

(190.5)

3.00(76.2)

9.50(241)

5.55(141)CENT.

2.71(68.9)

1.25(31.8)TYP.

2.75(69.9)CENT.

8.00(203.2)

TYP.

2.75(69.9)TYP.

1.75 TYP.(44.5)

.75 (19.1)TYP.

1012

118

97

R

A10921

23

54

6

A1192

R

Figure 11: A1092

Figure 9: TD92-0509

Figure 12: M420, M520, AND 620 Modulating Valves

Figure 10: Optional T115 Room Override Thermostat

in. (mm) in. (mm)

in. (mm)

© 2012 Maxitrol © 2012 Maxitrol

© 2012 Maxitrol

4.00

SQ

.(1

02)

4.68(119) TYP.

2.96(75) TYP.

1.69(43) TYP.

1.41(36) TYP.

3.46 (88)3.25 (83)

2.56 (65) TYP.

9.50(241)

1.89 TYP.

(48)2.25(57)

3.00(76)

7.50(191)

5.55 (141) CENT.

2.75(70)

CENT.

1.75 TYP. (45)

2.75 (70) TYP.

8.00(203) TYP.

.75 (20) TYP.

1.25(32) TYP.

2.71(69)

3.38 (86)

CENT.

A

D

C

B

© 2012 Maxitrol