Page 228 of Propane and Natural Gas Equipment by National Energy Equipment, Inc.

CANADAS LEADER IN ENERGY PRODUCTS EQUIPMENT  MAXITROL MODULATING SYSTEMS Designed for applications such as portable construction heaters. The T244 Selectrastat senses the ambient air and provides a dial for selecting desired room temperature within a 55 to 90 F range. The valve is driven by an A1024 amplifier. The system can be used only on units not requiring a high temperature discharge cut off. Use with M411, M511,M611, MR212 modulator/modulator-regulator valves. Used to obtain higher turndown on indirect fired applications. 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 amplifier is similar in function to an A1094, but uses standard wires (4) to connect to the TD92 instead of a ribbon cable. Maximum recommended wire length is 300 ft. Duct temperature sensing is by 1,000 ohm RTD such as TS394-3B-48FQ or TS194 (w/mixing tube). An optional T115 room override thermostat provides space temperature control by raising the discharge air temperature to a pre-selected point -when used in conjunction with the remote temperature selector. Use with M420, M520, M620 modulating valves. A1024 T244 SELECTRA SYSTEMS Selectra Series 24 Systems M411, 511 M611 MR212 Selectra Series 92 Systems A1092 TD92-0509 (50 to 90 ) TS394-3B-48FQ TS194 (use with mixing tube) Use with M420, M520 and M620 Modulating Valves T115 (optional)

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