FAN & LIMIT CONTROLS 308 Part numbers and illustrations are for identification only © 1971-2010 w.d. armstrong corp. HL LIMIT SWITCH OPEN ON RISE HF FAN SWITCH CLOSE ON RISE MANUAL RESET LIMITS HEATING THERMOSTATS For Air Stream or Surface Mount These 6 new Adjustable Thermostats provide replacement coverage for approximately 95% of the hun- dreds of different temperature ranges and styles used on dryers and heating equipment.  Each AT Series thermostat can be adjusted up to 40º   from the low to the high setting by rotating the adjustable pointer to the desired temperature on the dial. ADJUSTABLE THERMOSTATS GAS FURNACE LIMIT THERMOSTATS Type 36T style thermostat, 3" board mount.  Replacement for gas furnace limits, used since 1987.  UL Recognized and CSA Approved. Temp. Setting(Fº) Part No   Cut-In Cut-Out HF90 90 80 HF110 110 90 HF120 120 100 HF130 130 110 HF140 140 120 HF150 150 130 HF160 160 140 HF170 170 150 HF180 180 160 HF190 190 170 HF200 200 180 HF250 250 220 HF350 350 330 Temp. Setting(Fº) Part No   Cut-In Cut-Out HL140 100 140 HL150 110 150 HL160 120 160 HL170 130 170 HL180 140 180 HL190 150 190 HL200 160 200 HL210 170 210 HL230 190 230 HL250 210 250 HL300 250 300 HL325 275 325 Temp.(Fº) Part  No Cut-Out HM160 160 HM170 170 HM180 180 HM190 190 HM200 200 HM240 240 HM300 300 Part No. Replacement for Opens Closes HL501 Bryant HH12ZA174A 170ºF 130ºF Carrier HH12ZA176A, P331-2203 HL502 Lennox 26H6501 180ºF 150ºF Carrier HH12ZA178A Goodman B1370001 HL503 Bryant HH12ZA189 190ºF 150ºF Carrier HH12ZA193A, P331-2205 HL504 Bryant HH12ZA240 240ºF 160ºF Carrier HH12ZA199A, HH12Z252A LIMIT CONTROLS - S.P.S.T. Part No. Range Diff. AT12 L135-2 to L175-2 20º AT13 L175-4 to L215-4 40º AT14 L210-4 to L250-4 40º AT15 L250-4 to L290-4 40º FAN CONTROLS - S.P.S.T. AT21 F90-2 to F130-2   20º AT22 F140-2 to L180-2 20º