Overview of Primary Product

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MAKE UP AIR APPLICATIONS - Series 21 System
Series 21 Basic System Options
Valves Amplier
Selection
Method
Remote Selector
Model (if applicable)
Discharge
Temp. Sensor
Override
Stat
Inlet Air
Sensor
MR410,
MR510
& MR610
A1010U
(replaces A1010A, B
or A1011A, B)
Remote TD121 TS121 / MT1 or 2 T115 TS10765
AD1010U
(replaces A1010E, F
or A1011E, F)
Integral — TS121 / MT1 or 2 T115 TS10765
Note: Selector and sensor must have same temperature range to be compatible.
SYSTEM COMPONENTS
Series 21 Amplier (A1010U Shown)
A1010U
AD1010U - integral temp.
selector
Modulator-Regulator Valves
MR410
3/8” and 1/2” pipe sizes
MR510
1/2” and 3/4” pipe sizes
MR610
3/4” and 1” pipe sizes
Remote Temperature Selectors
TD121: 55° to 90°F
TD121A: 80° to 130°F
TD121B: 120° to 170°F
TD121C: 160° to 210°F
TD121D: 200° to 250°F
TD121E: 100° to 250°F
TD121F: 40° to 80°F
Note: Remote Selector and
Discharge Temperature Sensor
must have same temperature
range to be compatible.
Optional: ETD-1 enclosure, EFP-
1 cover plate only - no enclosure.
Discharge Temp. Sensors: use with Mixing Tube
TS121: 55° to 90°F
TS121A: 80° to 130°F
TS121B: 120° to 170°F
TS121C: 160° to 210°F
TS121D: 200° to 250°F
TS121E: 100° to 250°F
TS121F: 40° to 80°F
SPECIFICATIONS
Transformer secondary must not be grounded in any
portion of the circuit external to a Maxitrol amplier. If
existing transformer is grounded, a separate, independent
transformer must be used. Electrical interference may
affect performance and/or damage equipment.
NOTICE
Gases: Suitable for natural, manufactured, mixed gases,
liqueed petroleum gases, and LP gas-air mixtures.
Power Requirements:
Single Furnace.......24V AC, 40VA capacity
Multiple Furnace.....24V AC, 100VA capacity
Temperature Control Range:
Standard...................55° to 90°F
Optional ranges to....250°F
Ambient Limits: -30º to 125ºF / -34º to 52ºC
Mixing Tubes: use with Sensors
MT1-9 OR MT2-9: 9” length
MT1-12 OR MT2-12: 12” length
MT1-23 OR MT2-23: 23” length
MT1-28 OR MT2-28: 28” length
MT1-57: 57” length
OPTIONAL: Inlet Air Sensors - use with Mixing Tube
TS10765A - 8:1 ratio
TS10765B - 5:1 ratio
TS10765C - 3:5:1 ratio
OPTIONAL: Override Stat - use with TD121 only
T115: 40° to 90°F