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Features
& Benefits |
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Easy-wire terminal strip |
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Microprocessor-operated (Processor coordinates operation and diagnostic) |
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Easy remote sense (Electronic sensor, wired to control) |
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Self-checking program (Control locks out on diagnostic failure) |
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Diagnostic/status LED's (LED's indicate power, call for heat, and lockout) |
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SMC Technology on burner relay (Safety Monitoring Circuit) Lockout when welded contact sensed |
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Model
90524A |
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Triple
Limit or Cold-start Control
The 90524 triple limit control provides high limit function and can also provide minimum water temperature control for operating with a tankless heater in a boiler. Function can be turned off by turning Low Limit setting to Off. Low temperature limit to prevent flow through boiler if temperature is below preset minimum for preventing condensation in conventional boilers. Operates as a col-start control when Low Limit is Off. Provides input from zone controller or relays and output to enable circulators. Provides operation of burner/gas valve and heating circulator. |
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Power
Input
(L1-L2) |
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120
vac, 10 VA, 60 Hz |
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Control Power
(T-T) |
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24 vac, 130 mA |
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High Limit Range |
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Adjustable |
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High Limit Differential |
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Fixed if low limit is used or if differential set point is Off. Adjustable if low limit is turned Off. |
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Low Limit Range |
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Adjustable with Off position |
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Low Limit Differential |
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Adjustable fixed if differential set point is Off. |
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Low Temp Function |
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Fixed |
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Low Temp Differential |
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Fixed |
Temperature ranges Settings |
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Any value/range between 50-250 degrees |
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Temperature ranges Differential |
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Any value/range between 5-100 degrees |
Contact Ratings Full Load |
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Burner, circulator and ZC contacts 120 vac, 10 amps (total current on all contacts not to exceed 16 amps) |
Contact Ratings Locked Rotor |
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120 vac, 60 amps total current on all contacts not to exceed 96 amps |
Ambient Temperature |
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+32 to +140 Degrees |
Storage Temperature |
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-40 to +185 Degrees |
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Wiring
Diagram |
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Agencies |
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UL
Listed US and Canada |
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